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WO2024058199A1 - Dispositif de palier et dispositif mécanique - Google Patents

Dispositif de palier et dispositif mécanique Download PDF

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Publication number
WO2024058199A1
WO2024058199A1 PCT/JP2023/033296 JP2023033296W WO2024058199A1 WO 2024058199 A1 WO2024058199 A1 WO 2024058199A1 JP 2023033296 W JP2023033296 W JP 2023033296W WO 2024058199 A1 WO2024058199 A1 WO 2024058199A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing device
fixed
protrusion
ring
fitting element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2023/033296
Other languages
English (en)
Japanese (ja)
Inventor
孝誌 小池
靖之 福島
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTN Corp
Original Assignee
NTN Corp
NTN Toyo Bearing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2023147527A external-priority patent/JP2024041062A/ja
Application filed by NTN Corp, NTN Toyo Bearing Co Ltd filed Critical NTN Corp
Publication of WO2024058199A1 publication Critical patent/WO2024058199A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/067—Fixing them in a housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such

Definitions

  • the present disclosure relates to a bearing device and a mechanical device.
  • a bearing device in which a sensor is provided adjacent to the bearing for the purpose of monitoring the condition of the rolling bearing for device maintenance.
  • the bearing device includes a generator and a sensor.
  • the bearing device may have a configuration capable of wirelessly transmitting the data detected by the sensor for the purpose of transmitting the data detected by the sensor with high convenience.
  • the sensor unit disclosed in Japanese Patent Application Publication No. 2021-63510 is mounted on a bearing device.
  • the sensor unit includes an annular support and a sensor (such as an acceleration sensor) fixed to a thin portion of the support.
  • a positioning hole extending in an axial direction perpendicular to the radial direction is provided in the thick part of the support.
  • the acceleration sensor has a detection axis.
  • the detection axis means the direction in which the acceleration should be detected by the sensor, and does not necessarily mean that there is an axis as a structure.
  • JP-A-2021-63510 in order to align the vibration direction to be measured with the detection axis of the acceleration sensor, a hole provided in the support body is provided in order to align the position with a hole provided in the equipment to which the bearing device is fixed; and a pin inserted into the hole.
  • the sensor unit disclosed in Japanese Patent Application Laid-open No. 2021-63510 can uniquely match the circumferential phase of the acceleration sensor by aligning it with the main body using the positioning hole of the support.
  • the contact force (pressing force) between the sensor unit and the bearing is weak, the vibration generated in the bearing will be attenuated and transmitted to the acceleration sensor, and there is a risk that the acceleration in the desired direction (detection axis) cannot be accurately measured. be.
  • An object of the present disclosure is to provide a bearing device and a mechanical device in which an acceleration sensor is reliably fixed to equipment while the bearing device is fixed to the equipment, and acceleration can be measured more accurately.
  • One bearing device includes a bearing and an acceleration sensor.
  • a bearing includes an outer ring, an inner ring, and rolling elements.
  • the acceleration sensor detects vibrations in the bearing.
  • the first fitting element is formed in a fixed ring integral member that includes a fixed ring that is either an outer ring or an inner ring and is integrated with the fixed ring.
  • the first fitting element is at least one of a recess and a protrusion.
  • An acceleration sensor is fixed to the fixed wheel integral member.
  • One mechanical device includes the above bearing device and a main body to which it is fixed.
  • the main body is formed with a cavity in which the bearing device can be accommodated.
  • a second fitting element that contributes to fitting with the first fitting element is formed in the main body so as to extend radially from the cavity.
  • the second fitting element is at least one of a recess and a protrusion. In the above, the second fitting element may extend from the cavity along the axial direction.
  • a second mechanical device includes the above bearing device and a main body to which it is fixed.
  • the main body is formed with a cavity in which the bearing device can be accommodated.
  • the main body is provided with a fixing member in which a second fitting element that contributes to fitting with the first fitting element is formed.
  • the second fitting element is at least one of a recess and a protrusion.
  • a bearing includes an outer ring, an inner ring, and rolling elements.
  • the acceleration sensor detects vibrations in the bearing.
  • An acceleration sensor is fixed to a fixed ring that is either an outer ring or an inner ring.
  • a hole is formed in the fixed ring so that a part of the fixing member can be housed therein, and another part of the fixing member can be protruded from the hole.
  • a protrusion serving as the fixing member may protrude from the fixed ring.
  • Another mechanical device according to the present disclosure includes the bearing device described above and a main body to which it is fixed.
  • the main body is formed with a cavity in which the bearing device can be accommodated.
  • a groove into which the protrusion is inserted is formed in the main body so as to extend radially outward from the cavity.
  • FIG. 1 is a perspective view of an entire bearing device according to a first embodiment
  • FIG. 2 is a cross-sectional view of the bearing according to the first embodiment on a plane including the rotation axis.
  • 3 is an enlarged cross-sectional view of the sensor unit and magnetic ring in FIG. 2
  • FIG. FIG. 7 is an enlarged cross-sectional view of a modification of the first embodiment, showing an aspect of a protrusion as a bolt.
  • FIG. 3 is a diagram of the bearing device of Embodiment 1 viewed from the sensor unit side.
  • FIG. 2 is an exploded perspective view of the sensor unit in Embodiment 1.
  • FIG. 3 is a perspective view of the sensor unit according to the first embodiment after being assembled.
  • FIG. 3 is a view of a state in which the bearing device according to Embodiment 1 is attached to a main body, viewed from the sensor unit side, for explaining the effects of Embodiment 1;
  • FIG. 3 is a perspective view of the entire bearing device according to the second embodiment.
  • FIG. 7 is a diagram of the bearing device of Embodiment 2 viewed from the sensor unit side.
  • FIG. 7 is a perspective view of the sensor unit in Embodiment 2 after assembly.
  • FIG. 7 is a diagram of a state in which a bearing device according to a second embodiment is attached to a main body, as viewed from the sensor unit side, for explaining the effects of the second embodiment.
  • FIG. 7 is a view of a bearing device according to a third embodiment attached to a main body, viewed from the sensor unit side, for explaining the effects of the third embodiment.
  • FIG. 7 is a cross-sectional view of a bearing according to a fourth embodiment in a plane including a rotation axis.
  • FIG. 7 is a diagram of a first example of a mode in which a bearing device according to a fifth embodiment is attached to a main body, as viewed from the sensor unit side.
  • FIG. 12 is a diagram of a second example of the aspect in which the bearing device according to Embodiment 5 is attached to the main body, as viewed from the sensor unit side.
  • FIG. 7 is a diagram of a third example of a bearing device according to a fifth embodiment, viewed from the sensor unit side.
  • FIG. 12 is a view of a bearing device according to a third example of Embodiment 5 attached to a main body, viewed from the sensor unit side, for explaining the effects of the third example of Embodiment 5;
  • FIG. 7 is a diagram of a fourth example of a bearing device according to Embodiment 5, viewed from the sensor unit side.
  • FIG. 12 is a view of a bearing device according to a fourth example of Embodiment 5 attached to a main body, viewed from the sensor unit side, for explaining the effects of the fourth example of Embodiment 5;
  • FIG. 12 is a view of a bearing device according to a fourth example of Embodiment 5 attached to a main body, viewed from the sensor unit side, for explaining the effects of the fourth example of Embodiment 5;
  • FIG. 12 is a view of a bearing device according to a fourth example
  • FIG. 7 is a cross-sectional view of a first example of a bearing device according to a sixth embodiment in a plane including a rotating shaft.
  • FIG. 7 is a cross-sectional view taken on a plane including the rotating shaft, showing a state in which a bearing device according to a first example of Embodiment 6 is attached to a main body, for explaining the effects of the first example of Embodiment 6;
  • FIG. 12 is a view of a state in which a bearing device according to a first example of Embodiment 6 is attached to a main body, viewed from the sensor unit side, for explaining the effects of the first example of Embodiment 6;
  • FIG. 7 is a cross-sectional view of a first example of a bearing device according to a sixth embodiment in a plane including a rotating shaft.
  • FIG. 7 is a cross-sectional view taken on a plane including the rotating shaft, showing a state in which a bearing device according to a first example of Embodiment 6 is attached to
  • FIG. 7 is a cross-sectional view of a second example of a bearing device according to Embodiment 6 in a plane including a rotating shaft.
  • FIG. 7 is a cross-sectional view taken on a plane including the rotating shaft, showing a state in which a bearing device according to a second example of Embodiment 6 is attached to a main body, for explaining the effects of the second example of Embodiment 6;
  • FIG. 7 is a cross-sectional view of a first example of a bearing device according to a seventh embodiment in a plane including a rotating shaft.
  • FIG. 7 is a cross-sectional view taken on a plane including the rotating shaft, showing a state in which a bearing device according to a first example of Embodiment 7 is attached to a main body, for explaining the effects of the first example of Embodiment 7;
  • FIG. 12 is a diagram of a state in which a bearing device according to a first example of Embodiment 7 is attached to a main body, as viewed from the sensor unit side, for explaining the effects of the first example of Embodiment 7;
  • FIG. 7 is a cross-sectional view of a second example of a bearing device according to Embodiment 7 in a plane including a rotating shaft.
  • FIG. 12 is a diagram of a state in which a bearing device according to a first example of Embodiment 7 is attached to a main body, as viewed from the sensor unit side, for explaining the effects of the first example of Embodiment 7;
  • FIG. 7 is a cross-sectional view of a second example of a bearing
  • FIG. 7 is a cross-sectional view taken on a plane including the rotating shaft, showing a bearing device according to a second example of Embodiment 7 attached to a main body, for explaining the effects of the second example of Embodiment 7;
  • FIG. 12 is a diagram of a state in which a bearing device according to a second example of Embodiment 7 is attached to a main body, as seen from the sensor unit side, for explaining the effects of the second example of Embodiment 7;
  • FIG. 7 is a sectional view taken in a plane including the rotating shaft, showing a bearing device according to the first example of Embodiment 8 attached to a main body, for explaining the configuration and effects of the first example of Embodiment 8; be.
  • FIG. 12 is a diagram of a state in which a bearing device according to a second example of Embodiment 7 is attached to a main body, as seen from the sensor unit side, for explaining the effects of the second example of Embodiment 7
  • FIG. 7 is a
  • FIG. 12 is a diagram of a state in which a bearing device according to a first example of Embodiment 8 is attached to a main body, as viewed from the sensor unit side, for explaining the effects of the first example of Embodiment 8;
  • 2 is a sectional view taken in a plane including the rotating shaft, showing a bearing device according to a second example of Embodiment 8 attached to a main body, for explaining the configuration and effects of the second example of Embodiment 8; be.
  • FIG. 12 is a diagram of a state in which a bearing device according to a second example of Embodiment 8 is attached to a main body, as seen from the sensor unit side, for explaining the effects of the second example of Embodiment 8.
  • FIG. 1 is a perspective view of the entire bearing device according to the first embodiment.
  • a bearing device 1 according to the present embodiment includes a bearing 2, a sensor unit 6, and a magnetic ring 7.
  • the bearing 2 includes an outer ring 3 and an inner ring 4.
  • the outer ring 3 is a fixed ring
  • the inner ring 4 is a rotating ring.
  • the bearing 2 will be explained using a deep groove ball bearing as an example, the type of the bearing 2 is not limited to the deep groove ball bearing.
  • the bearing 2 is a standard bearing whose main dimensions (inner diameter, outer diameter, width, etc.) are specified in a specific standard.
  • a standard bearing is, for example, a bearing with dimensions specified in ISO standards and JIS standards.
  • the bearing 2 is a radial bearing, and the main dimensions of the bearing 2 are those specified in ISO15 or JISB1512-1. Below, the bearing 2 is also referred to as a standard bearing 2.
  • the sensor unit 6 includes a stator 5 and a lid 14. Details of the structure of the stator 5 will be described later.
  • the lid 14 protects the inside of the sensor unit 6.
  • the magnetic ring 7 is a magnetic member in which north poles and south poles are alternately magnetized in the circumferential direction.
  • the stator 5 is fixed to the outer ring 3 and the magnetic ring 7 is fixed to the inner ring 4.
  • the stator 5 and the magnetic ring 7 constitute a generator G.
  • the generator G is a claw pole type generator, it may be a generator having another structure.
  • the one-dot chain line in FIG. 1 is the rotation axis O of the bearing 2.
  • FIG. 2 is a cross-sectional view of the bearing according to the first embodiment in a plane including the rotation axis.
  • FIG. 3 is an enlarged cross-sectional view of the sensor unit and magnetic ring in FIG. 2, in particular.
  • the bearing 2 includes, in addition to an outer ring 3 and an inner ring 4, rolling elements 8, a retainer 9, and a seal 10.
  • the distance W between the end surface 11 and the rolling elements 8 in the axial direction may be selected from the size of a standard bearing model that can accommodate the sensor unit 6 and the magnetic ring 7.
  • the end face 11 is also the end face of the outer ring 3.
  • a plurality of rolling elements 8 are arranged at intervals in the circumferential direction of the bearing 2 (depth direction in FIG. 2).
  • a cage 9 holds the plurality of rolling elements 8.
  • the retainer 9 is open at one end surface side (the right side in FIG. 2) in the left-right direction in FIG. 1, which is the axial direction.
  • the cage 9 has a shape in which the other end surface side in the axial direction (the left side in FIG. 2) is connected. For this reason, in FIG. 2, the cage 9 is arranged only in an area to the left of the center of the rolling element 8, and the cage 9 is not arranged in an area to the right of the center of the rolling element 8.
  • the sensor unit 6 that constitutes the bearing device 1 of this embodiment includes a holding member 12 and a circuit board 13 in addition to the stator 5 and the lid 14.
  • the holding member 12 is disposed at a position of the retainer 9 closer to one end surface than the rolling elements 8 (on the right side in FIG. 2). That is, the holding member 12 is arranged in the axial direction on the side where the cage 9 is opened and the cage 9 is not disposed.
  • the holding member 12 is placed at the position where the retainer 9 should originally be placed.
  • the holding member 12 has a side plate portion 12A, an outer peripheral portion 12C, and an inner peripheral portion 12D.
  • the outer circumferential portion 12C and the inner circumferential portion 12D will be collectively referred to as a circumferential portion.
  • the side plate portion 12A extends along the circumferential direction, that is, in an annular shape. That is, the side plate portion 12A extends continuously in the circumferential direction (one round).
  • the peripheral portion extends to intersect with the side plate portion 12A.
  • the side plate portion 12A is arranged at a position of the holding member 12 closest to the rolling element 8 in the axial direction (inner side within the bearing 2) so as to be adjacent to the rolling element 8.
  • the side plate portion 12A has a back surface 12b on the side facing the rolling element 8, and a front surface 12f on the side opposite to the back surface 12b (that is, the side not facing the rolling element 8).
  • the back surface 12b faces the inside of the bearing 2
  • the front surface 12f faces the outside of the bearing 2.
  • the area on the surface 12f of the side plate 12A of the holding member 12 is surrounded by the side plate 12A, the outer periphery 12C, and the inner periphery 12D.
  • the holding member 12 is a ring member having a C-shaped (or U-shaped) cross-sectional shape with a side plate portion 12A, an outer peripheral portion 12C, and an inner peripheral portion 12D.
  • the circuit board 13 is fixed to the surface 12f of the side plate portion 12A of the holding member 12.
  • One or more sensors for monitoring and detecting the state of the bearing 2 are mounted on the circuit board 13.
  • an acceleration sensor 15 is mounted on the circuit board 13 as a sensor. Acceleration sensor 15 detects vibrations of bearing 2 .
  • the circuit board 13 is fixed to, for example, a relatively radially outer region (a region close to the outer peripheral portion 12C) of the surface 12f. A part of the outer edge of the circuit board 13 may be in contact with the inner wall of the outer peripheral portion 12C.
  • the acceleration sensor 15 is located between the outer ring 3 and the inner ring 4 in the radial direction, and is located in an annular space (inside the bearing 2) on the rolling element 8 side (left side in FIG. 2) than the ends of the outer ring 3 and the inner ring 4 in the axial direction. space). In other words, the acceleration sensor 15 is arranged inside the bearing 2.
  • the acceleration sensor 15 detects vibrations generated due to an abnormality in the bearing 2, and uses the detected data to monitor whether or not the bearing 2 is abnormal.
  • the outer circumferential portion 12C of the holding member 12 is fixed by fitting into a first notch 3a formed in the inner circumferential surface of the outer ring 3 on one end surface side (right side in FIG. 2).
  • the holding member 12 may be fixed to the outer ring 3 by using a combination of press-fitting and adhesion, or may be fixed by a method other than these.
  • Fixation is not limited to strong fixation that does not allow them to come apart from each other, but also includes a state where the parts can be easily removed but require a certain amount of pulling force, such as when they are press-fitted.
  • the outer ring 3 and the holding member 12 are integrated. Therefore, in the present embodiment, a combination of the outer ring 3 and the holding member 12 fixed integrally with the outer ring 3 is defined as a "fixed ring integral member.” Therefore, in this embodiment, the acceleration sensor 15 mounted and fixed on the circuit board 13 fixed to the holding member 12 is considered to be fixed to the holding member 12. That is, in this embodiment, the acceleration sensor 15 is fixed to the fixed wheel integral member.
  • the first notch 3a extends along the axial direction from the end surface 11 by, for example, 10% or more and 20% or less of the axial dimension of the outer ring 3.
  • the first notch portion 3a extends along the radial direction from the surface of the outer ring 3 closest to the inner ring 4 (radially inner side), for example, by a dimension of 20% or more and 40% or less of the radial dimension of the outer ring 3.
  • the radial dimension and the axial dimension of the first notch portion 3a may be equal, the radial dimension may be larger, or the axial dimension may be larger.
  • the holding member 12 is a member that constitutes the sensor unit 6. Therefore, by fixing the holding member 12 to the outer ring 3, which is a fixed ring, other members constituting the sensor unit 6, that is, the circuit board 13, are also fixed to the outer ring 3. Since the acceleration sensor 15 is mounted on the circuit board 13, it can be said that the acceleration sensor 15 is also fixed to the outer ring 3. Actually, the acceleration sensor 15 is not directly fixed to the outer ring 3 , but is fixed to the outer ring 3 via the circuit board 13 and the holding member 12 . However, here, the case is not limited to the case where the two members are directly fixed, but also includes the case where the two members are restrained to each other (indirectly) via another member, such as the acceleration sensor 15 and the outer ring 3. Suppose that the two members are fixed.
  • the outer ring 3 has an outer ring raceway surface 3b and an outermost surface 3c.
  • the outer ring raceway surface 3b is a surface where the outer ring 3 contacts the rolling elements 8.
  • the outermost surface 3c is the outermost surface of the outer ring 3 in the radial direction.
  • the outermost surface 3c is also the outermost surface in the radial direction of the entire bearing 2.
  • a protrusion 33A (fixing member) protrudes from the outer ring 3.
  • the protrusion 33A is an elongated member such as a pin that extends in one direction. In this embodiment, a recess 34A serving as a hole is formed in the outer ring 3.
  • the protrusion 33A is embedded in a recess 34A formed a certain depth along the radial direction from the outermost surface 3c of the outer ring 3, and protrudes from there so as to extend outward in the radial direction.
  • the recessed portion 34A is a region where the material constituting the outer ring 3 is partially shaved off.
  • the portion of the protrusion 33A inserted into the recess 34A is surrounded by the outer ring 3 and is therefore surrounded by the material forming the outer ring 3. Therefore, part of the surface of the protrusion 33A is buried inside the outer ring 3, and the other part of the surface is exposed from the outermost surface 3c of the outer ring 3 to the outside of the outer ring 3. There is.
  • the protrusion 33A protrudes from the inside of the outer ring 3 to the outside of the outer ring 3 so as to extend in the radial direction.
  • the recess 34A formed in the outer ring 3 and the protrusion 33A protruding therefrom are the first fitting elements formed in the outer ring 3 (fixed ring integral member).
  • the first fitting element is at least one of a recess and a protrusion.
  • the first fitting element is formed as an uneven portion having at least one of a concave shape and a convex shape on the surface of the fixed ring integral member other than the first fitting element.
  • the first fitting element may be at least one of a concave portion and a convex portion relative to a portion of the fixed ring integral member other than that (first fitting element).
  • the first fitting element may be one of a recess and a protrusion on the surface of the fixed ring integral member, or both a recess and a protrusion.
  • the first fitting element is both a concave portion 34A and a convex protrusion 33A relative to the other portions of the outer ring 3.
  • the outer ring 3 and the protrusion 33A may be formed by machining so that the recess 34A is not provided and the outer ring 3 and the protrusion 33A are cut out as one piece. In this case, the first fitting element is only the protrusion 33A.
  • the first fitting element of the present embodiment shown in FIG. 2 and the like is only a protrusion 33A that is a convex portion for fitting into a recess described below.
  • the recess 34A for fixing the projection 33A to the outer ring 3 is required, not only the projection 33A but also the recess 34A is structurally included in the first fitting element.
  • the following examples are also based on this concept, and for example, in the case of FIG. 2 of this embodiment, depending on the situation, the first fitting element is only the protrusion 33A, and the first fitting element is the protrusion 33A and the recess. There are two ways to state that it is both 34A and 34A.
  • the protrusion 33A is fixed in the recess 34A of the outer ring 3 by press-fitting or adhesive. In any case, the protrusion 33A is fixed to the outer ring 3 so as to be restrained. In other words, the protrusion 33A is rotationally restrained by the outer ring 3 with a pulling force greater than a certain level. Therefore, in order to remove the protrusion 33A from the outer ring 3, a pulling force greater than a certain level is required.
  • the protrusion 33A may have a shape that has a constant thickness (cross-sectional area), for example, from the inside of the recess 34A to the outside of the recess 34A (outside the outermost surface 3c of the outer ring 3).
  • the protrusion 33A may have a shape that gradually becomes thicker (the cross-sectional area increases) from the inside of the recess 34A toward the outside of the recess 34A. That is, the side surface of the protrusion 33A may be tapered.
  • the protrusion 33A may have a bent shape, for example, in the cross-sectional view of FIG. 2, having a portion extending in the radial direction and a portion bent therefrom and extending in the axial direction.
  • FIG. 4 is an enlarged sectional view of a modification of the first embodiment, showing the aspect of the protrusion as a bolt.
  • the protrusion 33A is a bolt with a male thread.
  • a female thread is formed in the recess 34A that accommodates the protrusion 33A to be fastened to the male thread of the protrusion 33A.
  • FIG. 4 differs from FIG. 2 in the above points, other points than the above are the same as FIG. 2, so the description thereof will not be repeated.
  • the stator 5 includes a stator 5A and a stator 5B.
  • the stator 5 when viewed from a different perspective, the stator 5 includes two magnetic members 21 and 22, a bobbin 23, and a coil 24.
  • a part of the holding member 12 is used as the magnetic member 21 of the stator 5A of the stator 5.
  • the stator 5B is used as the magnetic member 22.
  • the stator 5A corresponds to the holding member 12 and corresponds to the magnetic member 21.
  • the stator 5B corresponds to the magnetic member 22.
  • the stator 5A, the holding member 12, and the magnetic member 21 are the same, and the stator 5B and the magnetic member 22 are the same.
  • a coil 24 wound around a bobbin 23 is arranged inside the stator 5A, that is, in a relatively radially inner region surrounded by the side plate portion 12A, the outer peripheral portion 12C, and the inner peripheral portion 12D. A part of the surface of at least one of the bobbin 23 and the coil 24 may contact the inner peripheral portion 12D or may contact the side plate portion 12A.
  • the bobbin 23 and the coil 24 are covered with a magnetic member 22 as the stator 5B from the end surface 11 side in the axial direction (the side opposite to the rolling element 8). In the cross section shown in FIGS. 2 and 3, the magnetic member 22 has an outer peripheral portion 22B and an end surface portion 22C.
  • the magnetic member 22 actually further includes an inner peripheral portion 22D, which will be described later, in addition to the above.
  • the outer peripheral portion 22B and the end surface portion 22C are substantially perpendicular to each other. Since the magnetic member 22 has a portion that is not visible in FIGS. 2 and 3, it has a C-shape (U-shape).
  • the outer peripheral portion 22B divides the inside of the stator 5A into a radially outer region (a region where the circuit board 13 is arranged) and an inner region (a region where the coil 24 is arranged).
  • the end surface portion 22C is lined with the lid 14 and covers the inside of the stator 5A.
  • the end face portion 22C covers a radially inner region inside the stator 5A.
  • the inside of the stator 5A is covered from the end face 11 side so that both are lined up.
  • the bobbin 23 and the coil 24 are surrounded by a portion (radially inner region) of the side plate portion 12A of the stator 5A, an inner peripheral portion 12D, and an outer peripheral portion 22B and an end surface portion 22C of the stator 5B.
  • the above is as follows. While the magnetic member 21 occupies the entire holding member 12 , the magnetic member 22 is arranged in a radially inner region of the holding member 12 . A radially inner region of the U-shaped cross section of the magnetic member 21 faces the U-shaped cross section of the magnetic member 22 . A coil 24 including a bobbin 23 is mounted between the magnetic members 21 and 22 facing each other so as to be surrounded by the magnetic members 21 and 22.
  • the lid 14 covers the inner region of the stator 5A, especially in the region outside the stator 5B in the radial direction except for a part of the stator 5A surrounding the coil 24 and the stator 5B.
  • a stepped second notch 4a is formed on the outer peripheral surface of the inner ring 4 on one end surface side (right side in FIG. 2) so as to face the first notch 3a.
  • an annular recess cut out toward the rolling elements 8 is formed from the outer ring 3 to the inner ring 4 by the first notch 3a and the second notch 4a.
  • the second notch portion 4a extends along the axial direction from the end surface 11 by a distance of, for example, 5% or more and 10% or less of the axial dimension of the inner ring 4.
  • the second notch portion 4a extends along the radial direction from the surface of the inner ring 4 closest to the outer ring 3 (radially outer side) by a distance of, for example, 10% or more and 30% or less of the radial dimension of the inner ring 4.
  • the radial dimension and the axial dimension of the second notch portion 4a may be equal, the radial dimension may be larger, or the axial dimension may be larger.
  • the magnetic ring 7 includes a core metal 7a and a multipolar magnet 7b.
  • the multipolar magnet 7b is made by, for example, vulcanizing and adhering a magnetic material made by kneading magnetic powder and rubber to a core metal 7a, and then alternately magnetizing the N pole and the S pole in the circumferential direction of the magnetic ring 7. This is what I did.
  • the core metal 7a of the magnetic ring 7 has a flange portion 7c to increase rigidity.
  • the magnetic ring 7 is fixed to the outer diameter surface 4b of the inner ring 4 by press fitting, adhesive, or the like.
  • the flange portion 7c fits into a second notch portion 4a formed in the inner ring 4.
  • the holding member 12 is press-fitted or bonded so as not to protrude outward in the axial direction from the end surface 11 of the outer ring 3.
  • the circuit board 13 fixed to the holding member 12 also extends outward in the axial direction from the end surface 11 of the outer ring 3. It is placed so that it does not protrude.
  • the sensor unit 6 is fixed to the outer ring 3 so as not to protrude outward in the axial direction from the end surface 11 of the outer ring 3.
  • the magnetic ring 7 is arranged so as not to protrude from the end surface 20 of the inner ring 4.
  • the sensor unit 6 and the magnetic ring 7 are prevented from protruding from the open side of the retainer 9 in the axial direction.
  • both the sensor unit 6 (holding member 12 and circuit board 13) and the magnetic ring 7 are fixed (arranged) so that they do not protrude outward in the axial direction from the end surface 11 of the outer ring 3 and the end surface 20 of the inner ring 4. Ru.
  • the sensor unit 6 can be made thin in the axial direction, and the bearing device 1 can be provided with the same size as a standard bearing.
  • the magnetic ring 7, coil 24, and circuit board 13 of the bearing 2 are inside the annular recess formed by the first notch 3a and the second notch 4a. They are arranged on an imaginary straight line L extending along the radial direction so as to be spaced apart from each other. In other words, these are arranged on an imaginary straight line extending along the axial direction of the bearing 2 so as not to be lined up at intervals.
  • the magnetic ring 7, the coil 24, and the circuit board 13 are arranged in this order from the inside to the outside in the radial direction of the bearing 2. Thereby, each component can be arranged inside the annular recess, so that the thickness of the bearing 2 in the axial direction can be suppressed.
  • the magnetic ring 7 is fixed to the inner ring 4, and the stator 5 (particularly the area where the stator 5A and the stator 5B surround the bobbin 23 and the coil 24) is attached to the outer ring 3 at the opposing position. Fixed. Since the variation in the radial gap between the stator 5 and the magnetic ring 7 is small, a stable amount of power generation can be ensured by the generator G.
  • the holding member 12 (stator 5A/magnetic member 21) and the magnetic member 22 (stator 5B) are magnetic materials and are made of metal.
  • the lid 14 is a non-metallic resin member.
  • the circuit board 13 may be sealed using a resin sealing material instead of the lid 14.
  • FIG. 5 is a diagram of the bearing device of Embodiment 1 viewed from the sensor unit side.
  • a part of the lid 14 is omitted so that the inside of the sensor unit 6 can be seen.
  • a temperature sensor 16 is mounted on the circuit board 13 as sensors.
  • the acceleration sensor 15 is capable of detecting acceleration of the bearing 2, for example in the radial direction. Furthermore, the temperature sensor 16 can accurately measure the temperature of the bearing 2.
  • the bearing 2 is driven to rotate in the circumferential direction. Therefore, the radial direction, which is a direction intersecting the circumferential direction, is a direction in which acceleration does not normally reach the bearing 2. Therefore, by detecting the acceleration in the radial direction of the bearing 2, unintended abnormal vibrations of the bearing 2 can be detected.
  • a protrusion extension direction 35A (first direction indicated by arrow A) that radially connects the center of the rotation axis O of the bearing 2 and the protrusion 33A.
  • an acceleration sensor detection direction 35B (second direction indicated by arrow B) that radially connects the center through which the rotation axis O of the bearing 2 passes and the position where the acceleration sensor 15 is arranged.
  • the protrusion extension direction 35A and the acceleration sensor detection direction 35B have an angle ⁇ .
  • the angle ⁇ is designed by considering in advance the direction (angle) in which the bearing device 1 is to be fixed to the main body 36 (see FIG. 8, which will be described later) in the circumferential direction.
  • the sensor unit 6 on which the acceleration sensor 15 is mounted is fitted and fixed in the annular recess so that the angle ⁇ is predetermined depending on the aspect of the main body 36 to which the bearing device 1 is attached.
  • the position (angle ⁇ ) of the acceleration sensor 15 may be determined after being installed so that the protrusion extension direction 35A faces upward in the radial direction (vertical direction).
  • the recess 34A and the protrusion 33A as the first fitting element may be formed at a position where the detection direction of the acceleration sensor 15 can be detected.
  • a power supply circuit 17 and a wireless communication circuit 18 are further mounted on the circuit board 13.
  • the power supply circuit 17 rectifies the AC power generated by the generator G due to the rotation of the inner ring 4 and converts it into DC power.
  • the power supply circuit 17 is completely different from the power supply, that is, the generator G (electromagnetic induction generator) in this embodiment.
  • Acceleration sensor 15, temperature sensor 16, and wireless communication circuit 18 use DC power converted by power supply circuit 17.
  • Terminals 25 are arranged on the circuit board 13. Each end (not shown) of the winding start and winding end of the coil 24 included in the stator 5 and drawn out from the stator 5 is connected to a terminal 25 .
  • the circuit board 13 Since the circuit board 13 is fixed to a part of the annular side plate portion 12A, it has a generally arcuate shape.
  • An acceleration sensor 15 and a temperature sensor 16 are mounted in the circumferential direction of the arc-shaped circuit board 13 . Screws 19 may be placed on both sides of the acceleration sensor 15 with a space therebetween.
  • the wireless communication circuit 18, the acceleration sensor 15, the power supply circuit 17, and the terminal 25 may be arranged at intervals from one end to the other in the circumferential direction of the circuit board 13 in this order.
  • the wireless communication circuit 18 includes an antenna section 18a.
  • the outputs of the acceleration sensor 15 and the temperature sensor 16, which monitor the state of the bearing 2 are wirelessly transmitted to the outside using the antenna section 18a.
  • the circuit board 13 is fixed to the holding member 12 with a plurality of screws 19. Note that the circuit board 13 may be adhesively fixed to the holding member 12.
  • the circuit board 13 on which the wireless communication circuit 18 is mounted is placed facing the lid 14 made of resin.
  • the wireless communication circuit 18 has a structure that is not sealed with a conductive material such as metal. Therefore, wireless communication is possible using the antenna section 18a within the wireless communication circuit 18. Therefore, the bearing of the bearing device 1 is a bearing with a wireless sensor.
  • FIG. 6 is an exploded perspective view of the sensor unit in the first embodiment.
  • FIG. 7 is a perspective view of the sensor unit according to the first embodiment after being assembled. Note that the lid 14 is omitted in FIGS. 6 and 7.
  • a plurality of claw portions 21a are formed on the inner peripheral portion 12D of the magnetic member 21 (the member on the left in FIG. 6) having a U-shaped cross section.
  • a plurality of claw portions 22a are formed on the inner peripheral portion 22D of the magnetic member 22.
  • a coil 24 having a plurality of turns of magnet wire is arranged in a groove provided in the circumferential direction of the bobbin 23, a coil 24 having a plurality of turns of magnet wire is arranged.
  • the bobbin 23 may be omitted.
  • a through hole 12e is formed in the side plate 12A of the stator 5A (holding member 12/magnetic member 21).
  • the through hole portion 12e is formed in a radially inner region of the side plate portion 12A.
  • a convex portion 22e is formed at an end portion of the outer peripheral portion 22B of the stator 5B (magnetic member 22) on the side plate portion 12A side of the holding member 12 in the axial direction.
  • the end portion of the holding member 12 on the side plate portion 12A side protrudes toward the side plate portion 12A compared to the other portions.
  • a plurality of through holes 12e and convex portions 22e are formed at intervals in the circumferential direction.
  • each through-hole portion 12e and convex portion 22e have an arc shape along the circumference of the annular shape of the holding member 12.
  • the convex portion 22e is inserted into the through hole portion 12e, and the two are fitted together.
  • the plurality of claw parts 21a and the plurality of claw parts 22a are assembled so as to be arranged alternately with gaps in the circumferential direction.
  • the magnetic member 22 is attached to the inner peripheral portion 12D of the holding member 12.
  • the stator 5B is coupled to the stator 5A so that the end face portion 22C faces the outermost part in the axial direction (the rightmost part in FIG. 6).
  • the magnetic member 21 and the magnetic member 22 are coupled so that the end portion of the outer peripheral portion 22B (excluding the convex portion 22e) comes into contact with the side plate portion 12A.
  • the through hole portion 12e and the convex portion 22e are fixed to each other so as to be restrained by press fitting, adhesion, welding (for example, laser welding), or the like.
  • a plurality of the above fixing means may be selected and used in combination.
  • the axes of the magnetic member 21 and the magnetic member 22 can be aligned without using a jig, and assembly of the two becomes easier. Further, the phases can be adjusted so that the claw portions 21a and the claw portions 22a are arranged alternately in the circumferential direction. However, the through hole portion 12e and the convex portion 22e may be omitted. If both are omitted, a jig not shown in FIGS. 6 and 7 may be used to align the axes of the magnetic member 21 and the magnetic member 22, and to align the phases of the claw portions 21a and 22a. good. In this case, the side plate portion 12A and the outer peripheral portion 22B are brought into contact and fixed by welding (for example, laser welding).
  • the circuit board 13 is fixed to the surface 12f of the side plate portion 12A with screws 19, and the circuit board 13 is protected by the lid 14 or the resin sealant.
  • an insulating sheet for example, a polyimide film
  • an insulating sheet may be inserted between the circuit board 13 and the side plate portion 12A to ensure insulation between the circuit board 13 and the holding member 12.
  • the plurality of claw parts 21a and the plurality of claw parts 22a are arranged to face each other with a gap between them and the multipolar magnet 7b of the magnetic ring 7 shown in FIG.
  • the plurality of claws 21a of the magnetic member 21 in the stator 5, the plurality of claws 22a of the magnetic member 22, and the magnetic ring 7 constitute a radial claw pole generator G.
  • the total number of the plurality of claw portions 21a and 22a is equal to the number of poles (the total number of N poles and S poles) of the multipolar magnet 7b.
  • the stator 5 and the magnetic ring 7 face each other in the radial direction of the bearing 2.
  • the magnetic flux emitted from the N pole of the multipolar magnet 7b enters the magnetic member 21 (or magnetic member 22) from the plurality of claws 21a (or the plurality of claws 22a), which are magnetic poles, and flows around the coil 24. and returns to the S pole of the multipolar magnet 7b via a plurality of adjacent claw portions 22a (or a plurality of claw portions 21a).
  • the positions of the N and S poles of the multipolar magnet 7b are swapped due to the rotation of the inner ring 4, the direction of the magnetic flux is reversed.
  • the alternating magnetic field generated in this manner generates alternating current power at both ends of the coil 24.
  • a bearing device 1 includes a bearing 2 including an outer ring 3, an inner ring 4, and rolling elements 8, and an acceleration sensor 15 that detects vibrations of the bearing 2.
  • An acceleration sensor 15 is fixed to a fixed ring, which is either the outer ring 3 or the inner ring 4.
  • a hole (recess 34A) is formed in the fixed ring to accommodate a part of the fixing member (protrusion 33A) and allow the other part of the fixing member to protrude.
  • a protrusion 33A serving as a fixing member may protrude from the fixed ring.
  • the bearing device 1 includes a bearing 2 including an outer ring 3, an inner ring 4, and rolling elements 8, and an acceleration sensor 15 that detects vibrations of the bearing 2.
  • a first fitting element is attached to a fixed ring integral member that includes a fixed ring that is either the outer ring 3 or the inner ring 4 and is integrated with the fixed ring (the outer ring 3 and the holding member 12 are integrated by fixing). is formed (here, the first fitting element is formed on the outer ring 3).
  • the first fitting element is at least one of the recess 34A and the projection 33A (in this embodiment, it is both the recess 34A and the projection 33A).
  • An acceleration sensor 15 is fixed to the fixed wheel integral member.
  • FIG. 8 is a view of the bearing device according to Embodiment 1 attached to the main body, viewed from the sensor unit side, for explaining the effects of Embodiment 1.
  • the main body 36 to which the bearing device 1 is attached by the user is formed with a groove 36G into which the protrusion 33A is inserted.
  • the housing 36H which is part or all of the main body 36, has a cavity in which the annular bearing device 1 can be accommodated.
  • the cavity has a circular planar shape.
  • a groove 36G is formed by partially cutting away the material constituting the housing 36H so as to extend radially outward from the cavity. Note that the entire bearing device 1 attached to the main body 36 will be referred to as a mechanical device 37 below.
  • the main body 36 includes a first fitting element (in this case, a first fitting element) extending radially (radially outward) from the cavity, which contributes to fitting with the first fitting element (protrusion 33A).
  • a second fitting element (which is directly fitted with the protrusion 33A which is the fitting element) is formed.
  • the second fitting element is at least one of a recess and a protrusion.
  • the second fitting element is formed as an uneven portion having at least one of a concave shape and a convex surface on a portion of the main body 36 (housing 36H) other than the second fitting element.
  • the second fitting element may be at least one of a concave portion and a convex portion relative to a portion of the main body 36 other than that (second fitting element).
  • the second fitting element may be one of a recess and a protrusion on the surface of the main body relative to other parts, or both a recess and a protrusion.
  • the second fitting element is a groove 36G that is concave relative to the rest of the main body 36.
  • the bearing device 1 is fixed to the main body 36 by this fitting.
  • the second fitting element will also be considered depending on the situation in each of the following examples. There are two ways to consider it: and when it is considered both.
  • the bearing device 1 is designed in advance so that the angle between the protrusion extension direction 35A and the acceleration sensor detection direction 35B is ⁇ .
  • the acceleration sensor 15 is positioned on a straight line in the acceleration sensor detection direction 35B extending vertically upward. get on.
  • the bearing device 1 can be used to detect unintended vibrations with high precision. Since the protrusion 33A protruding from the bearing device 1 is inserted into the groove 36G of the housing 36H, the protrusion 33A (first fitting element) is restrained by the groove 36G (second fitting element), and the bearing device 1 This is because there is less possibility that the circumferential phase and radial position of will change with respect to the initial state.
  • the outer ring 3 (fixed ring) is prevented from rotating. Therefore, the outer ring 3 is prevented from rotating in the circumferential direction during operation of the mechanical device 37 including the main body 36. Therefore, the acceleration sensor detection direction 35B can always be maintained in the same direction (for example, vertically upward). Therefore, the accuracy of acceleration detection by the acceleration sensor 15 is increased, and the reliability of the acceleration sensor 15 is improved. If the position of the acceleration sensor 15 changes unintentionally, the vibration detected by the acceleration sensor 15 may be attenuated more than the vibration that should be detected originally. However, in this embodiment, such problems can be suppressed.
  • the bearing device 1 is securely fixed to the main body 36. Therefore, the acceleration sensor 15 fixed to the fixed ring is securely fixed to the main body 36, and acceleration can be measured more accurately.
  • the protrusion 33A may protrude from within the fixed ring (outer ring 3) so as to extend in the radial direction.
  • the protrusion 33A as the first fitting element protrudes from the outer ring 3 that is a part of the fixed ring integral member, and the protrusion 33A protrudes from the outer ring 3 so as to extend in the radial direction.
  • the radially extending protrusion 33A can suppress unintended displacement of the bearing device 1 in the circumferential direction that intersects with the protrusion 33A.
  • the bearing device 1 may further include a magnetic ring 7, a stator 5, a wireless communication circuit 18, a power supply circuit 17, and a circuit board 13.
  • the magnetic ring 7 is fixed to a rotating ring, which is either the outer ring 3 or the inner ring 4, and is magnetized alternately to north and south poles.
  • the stator 5 includes a magnetic ring 7 and a holding member 12 fixed to a fixed ring so as to face the bearing 2 in the radial direction as components, and houses a coil 24 therein.
  • the wireless communication circuit 18 wirelessly transmits the output of the acceleration sensor 15 to the outside.
  • the power supply circuit 17 can adjust the output from the generator G composed of the magnetic ring 7 and the stator 5.
  • Circuit board 13 mounts acceleration sensor 15, wireless communication circuit 18, and power supply circuit 17.
  • the bearing device 1 can generate electric power using the generator G as a power source, and the electric power generated by the generator G can be adjusted by the power supply circuit 17.
  • the wireless communication circuit 18 and acceleration sensor 15 mounted on the circuit board 13, the output of the acceleration sensor 15 can be wirelessly transmitted to the outside.
  • the power supply circuit 17 being able to adjust the output from the generator G means rectifying, for example, AC power generated by the generator G and converting it into DC power as described above.
  • the above-mentioned “adjustable” may mean controlling the voltage value to a target value by step-up or step-down.
  • a part of the stator 5 is the holding member 12, and the circuit board 13 may be fixed to the holding member 12.
  • the holding member 12 By allowing the holding member 12 to also function as the stator 5A (magnetic member 21), the number of parts can be reduced and each part can be easily press-molded.
  • the circuit board 13 is fixed to the fixed ring, and the acceleration sensor 15 mounted on the circuit board 13 is also fixed to the fixed ring. Therefore, the acceleration sensor 15 fixed to the fixed wheel is securely fixed to the main body 36, and acceleration can be measured more accurately.
  • the protrusion 33A may be fixed so as to be restrained by a fixed ring (fixed ring integral member). Therefore, by fitting the protrusion 33A into, for example, the groove 36G of the main body 36, the entire bearing device 1 including the fixed ring can be rotationally restrained with respect to the main body 36.
  • the acceleration sensor 15 is arranged in an annular space between the outer ring 3 and the inner ring 4 and closer to the rolling elements 8 than the ends of the outer ring 3 and the inner ring 4.
  • the first fitting element includes both the recess 34A and the protrusion 33A.
  • the protrusion 33A can be firmly fixed to the outer ring 3 so that the protrusion 33A is embedded in the recess 34A.
  • FIG. 9 is a perspective view of the entire bearing device according to the second embodiment. However, the viewing angle of the bearing device 1 in FIG. 9 is slightly different from that in FIG. 1 (Embodiment 1).
  • FIG. 10 is a diagram of the bearing device of Embodiment 2 viewed from the sensor unit side.
  • FIG. 11 is a perspective view of the sensor unit according to the second embodiment after assembly. In other words, FIGS. 9, 10, and 11 correspond to FIGS.
  • bearing device 1 of this embodiment is basically the same as that of Embodiment 1.
  • the protrusion 33A extends outward from the holding member 12 (the magnetic member 21 of the sensor unit 6) along the radial direction.
  • the protruding portion 33A is fixed to the outer peripheral portion 12C of the holding member 12.
  • the protrusion 33A is inserted into a notch 34B formed in the outer ring 3, which is a fixed ring.
  • the notch 34B corresponds to a hole (the recess 34A in the first embodiment).
  • the cutout portion 34B is formed on one end surface side of the outer ring 3 in the axial direction so as to extend in the radial direction.
  • the protrusion 33A extends longer in the radial direction than the notch 34B. Therefore, a portion of the protrusion 33A is exposed to the outside of the notch 34B in the radial direction, that is, to the outside of the outer ring 3.
  • the projection 33A radially penetrates the outer ring 3 from the holding member 12 and extends to the outside of the outer ring 3.
  • a notch 34B is formed in the outer ring 3 so that the protrusion 33A passes through the outer ring 3.
  • the protruding portion 33A is fixed to the outer peripheral portion 12C by, for example, welding.
  • the protrusion 33A may be integrally molded with the magnetic member 21 so that the protrusion 33A protrudes from the outer peripheral portion 12C. In this case, a bending process is performed.
  • the protrusion 33A penetrates the notch 34B and protrudes therefrom so as to extend radially outward.
  • the notch 34B is an area where the material constituting the outer ring 3 has been partially removed.
  • the portion of the protrusion 33A that penetrates the notch 34B is surrounded by the outer ring 3 on all sides, and is therefore surrounded by the material constituting the outer ring 3.
  • the protrusion 33A in this embodiment protrudes radially from within the outer ring 3 to the outside of the outer ring 3, similar to the protrusion 33A in embodiment 1.
  • the protrusion 33A penetrates the notch 34B of the outer ring 3, so the protrusion 33A protrudes from inside the outer ring 3 so as to extend in the radial direction.
  • the protrusion 33A is not directly fixed to the notch 34B.
  • the protrusion 33A is fixed to the holding member 12.
  • the holding member 12 is fixed to the outer ring 3 by press-fitting, adhesion, or the like so as to ensure a certain level of pulling force from the outer ring 3. Therefore, the protrusion 33A passing through the notch 34B is in substantially the same state as being rotationally restrained by the outer ring 3.
  • the angle between the protrusion extension direction 35A and the acceleration sensor detection direction 35B is zero degrees. That is, the protrusion extension direction 35A and the acceleration sensor detection direction 35B match, and arrow A and arrow B are in the same direction.
  • the protrusion 33A extends from the holding member 12 in the radial direction.
  • the protrusion 33A is fixed to the holding member 12.
  • the protrusion 33A is inserted into a notch 34B formed in the outer ring 3. More specifically, for example, the protrusion 33A may radially penetrate the outer ring 3 from the holding member 12 and extend to the outside of the outer ring 3.
  • FIG. 12 is a diagram of a state in which the bearing device according to Embodiment 2 is attached to the main body, as seen from the sensor unit side, for explaining the effects of Embodiment 2.
  • the protrusion 33A is fixed to the holding member 12
  • the protrusion 33A is inserted into the groove 36G of the main body 36, similar to the first embodiment in which the protrusion 33A is fixed to the outer ring 3.
  • the bearing device 1 can be fixed so that the acceleration sensor 15 is arranged in the direction in which acceleration is to be detected. Therefore, acceleration can be measured more accurately.
  • the protrusion 33A penetrates the outer ring 3 in the radial direction and extends to the outside thereof, the protrusion 33A as a first fitting element protruding from the outermost surface 3c can be firmly fixed to the outer ring 3.
  • a first direction (protrusion extension direction 35A) that radially connects the center through which the rotation axis O of the bearing 2 passes and the protrusion 33A (first fitting element), and a first direction (protrusion extension direction 35A) between the center and the acceleration sensor 15 in the radial direction (acceleration sensor detection direction 35B) and the second direction (acceleration sensor detection direction 35B) is zero degree.
  • the direction radially connecting the center of the rotation axis O and the groove 36G of the main body 36 is the vertically upward direction in the radial direction, and the direction in which vibration is desired to be detected is the vertically upward direction in the radial direction, It is preferable to set the above angle to zero degrees, as shown in FIG.
  • the protrusion 33A, the acceleration sensor 15, and the center of the rotation axis O are arranged on a straight line in the vertical direction.
  • the acceleration sensor detection direction 35B can be matched to the vibration direction desired to be measured.
  • FIG. 13 is a diagram of a state in which the bearing device according to Embodiment 3 is attached to the main body, viewed from the sensor unit side, for explaining the effects of Embodiment 3.
  • a bearing device 1 according to the present embodiment is basically the same as that according to the second embodiment.
  • the bearing device 1 of the present embodiment has a first direction (protrusion extension direction 35A) that radially connects the center through which the rotation axis O of the bearing 2 passes and the protrusion 33A (first fitting element);
  • the angle between the center and the second direction (acceleration sensor detection direction 35B) connecting the acceleration sensor 15 in the radial direction is 180 degrees.
  • the second embodiment FIG. 3
  • the protrusion 33A, the acceleration sensor 15, and the center of the rotation axis O are arranged on a straight line in the vertical direction.
  • the acceleration sensor detection direction 35B can be aligned with the vibration direction desired to be measured, for example, the vertical direction.
  • FIG. 14 is a sectional view of the bearing according to the fourth embodiment in a plane including the rotation axis.
  • this embodiment is basically the same as Embodiment 1, but inner ring 4 is a fixed ring and outer ring 3 is a rotating ring. Therefore, the sensor unit 6 including the stator 5 is fixed to the inner ring 4.
  • a second notch 4a having a similar aspect to the first notch 3a of the first embodiment is formed in the inner ring 4.
  • the inner circumferential portion 12D of the holding member 12 is fixed by fitting into a second notch 4a formed in the outer circumferential surface of the inner ring 4 on one end surface side (right side in FIG. 2). Therefore, the "fixed ring integral member" in this embodiment is a combination of the inner ring 4 and the holding member 12 fixed to the inner ring 4.
  • the magnetic ring 7 is fixed to the outer ring 3.
  • the outer ring 3 is formed with a first notch 3a and an inner diameter surface 3d in the same manner as the second notch 4a and outer diameter surface 4b of the first embodiment.
  • the protrusion 33A is embedded in a recess 34A formed a certain depth along the radial direction from the innermost surface 4c of the inner ring 4, and protrudes from there so as to extend inward in the radial direction.
  • the protrusion 33A extends to the outside of the inner ring 4 (radially inward of the innermost surface 4c) which is the fixed ring.
  • the fixed ring may be either the outer ring 3 or the inner ring 4.
  • FIG. 15 is a diagram of a first example of the aspect in which the bearing device according to Embodiment 5 is attached to the main body, as viewed from the sensor unit side.
  • FIG. 16 is a diagram of a second example of the aspect in which the bearing device according to Embodiment 5 is attached to the main body, as viewed from the sensor unit side.
  • a mechanical device 37 shown here is basically the same as the mechanical device 37 of the second embodiment shown in FIG.
  • the recess 34A and the groove 36G extend sufficiently longer in the axial direction (the depth direction of the paper in FIG. 15) than in the radial direction.
  • FIGS. 15 and 16 differ from FIG. 12 in which the recess 34A and the groove 36G extend along the radial direction, and the axial dimension may be smaller than the radial dimension.
  • a generally known pin 38 (having a circular cross section intersecting the extending direction) is shown in FIG. 15, and a generally known pin 38 is shown in FIG.
  • a key 39 (having a rectangular cross section intersecting the extending direction) is inserted in the axial direction of each figure.
  • the recess 34A and the groove 36G have a semicircular shape in FIG. 15 and a rectangular shape in FIG. 16.
  • the pin 38 and the key 39 are elongated members that extend in the axial direction and are inserted into the recess 34A, which is the first fitting element of the outer ring 3.
  • the pin 38 and key 39 contribute to the fitting by the recess 34A.
  • the pin 38 and the key 39 are interposed between the recess 34A (first fitting element) and the groove 36G (second fitting element), and the outer ring 3 has the recess 34A formed therein and the groove 36G has the groove 36G formed therein. This is a mode in which the main body 36 that has been removed is restrained.
  • the pin 38 and the key 39 suppress unintentional displacement of the bearing device 1 in the circumferential direction, and the acceleration sensor 15 fixed to the fixed ring can be moved to the main body 36. is securely fixed. Therefore, acceleration can be measured more accurately.
  • the angle between the protrusion extension direction 35A and the acceleration sensor detection direction 35B is zero degrees, similar to FIG. 12 of the second embodiment.
  • the angle formed between the protrusion extension direction 35A and the acceleration sensor detection direction 35B is arbitrary, so the angle is the same as in the first embodiment (FIG. 8) and the third embodiment (FIG. 13). You can.
  • the extending direction of the recess 34A formed for fixing the bearing device 1 to the main body 36 may be the radial direction as in the first to fourth embodiments, or may be the axial direction as in the fifth embodiment. .
  • the pin 38 and the key 39 are fixed to. I haven't.
  • the pin 38 and the key 39 are removable from the bearing device 1 and the main body 36, so they are not fixed to either the bearing device 1 or the main body 36. In some cases, they only make contact with both parties. In this case, pin 38 and key 39 do not function as protrusions of either the first or second fitting element. In this case, the concave groove 36G as the second fitting element does not directly fit into the concave recess 34A as the first fitting element.
  • the groove portion 36G and the recessed portion 34A have a concave shape, fitting is normally performed between the concave shape and the convex shape.
  • the groove portion 36G and the recess portion 34A allow the pin 38 or the key 39 to be inserted (accommodated), and the pin 38 or the key 39 can be fitted together. Therefore, the groove 36G and the recess 34A only indirectly contribute to the fitting between the bearing device 1 and the main body 36.
  • the pin 38 and the key 39 are fixed to either the bearing device 1 or the body 36 (as described in the following third and fourth examples)
  • the second mating element is connected to the first mating element. It may also directly contribute to mating. In this way, "contributing to fitting" includes both cases where it is directly involved in fitting and cases where it is only indirectly involved in fitting.
  • the explanation is based on the assumption that the key 39 is "fixed" to either the bearing device 1 (for example, the recess 34A of the outer ring 3) or the main body 36 (for example, the groove 36G).
  • FIG. 17 is a diagram of a third example of the bearing device according to Embodiment 5, viewed from the sensor unit side.
  • a bearing device 1 according to a third example of the fifth embodiment is basically the same as the bearing device 1 according to the first embodiment shown in FIG.
  • the recess 34A extends along the axial direction.
  • FIG. 17 is structurally different from Embodiment 1 in which the recess 34A extends in the radial direction.
  • the protrusion is not fixed to the outer ring 3.
  • FIG. 17 is structurally different from Embodiment 1 in which the protrusion 33A is embedded in the recess 34A and fixed to the outer ring 3.
  • a groove-shaped recess 34A extending along the axial direction is formed from the outermost surface 3c of the outer ring 3 to a certain depth along the radial direction.
  • the recess 34A extending along the axial direction means that the dimension in which the recess 34A extends in the axial direction is sufficiently larger than the dimension in which the recess 34A is cut in the radial direction (depth direction) from the outermost surface 3c. means.
  • a recess extension direction 35C (first direction indicated by arrow C) that radially connects the center through which the rotation axis O of the bearing 2 passes and the recess 34A.
  • the concave portion extension direction 35C and the acceleration sensor detection direction 35B coincide, and the angle they make is zero degrees.
  • the angle may be 180 degrees.
  • FIG. 18 is a diagram of a bearing device according to a third example of Embodiment 5 attached to a main body, viewed from the sensor unit side, for explaining the effects of the third example of Embodiment 5. .
  • a groove 36G is formed that extends radially outward (in the depth direction) from the inner peripheral surface of the cavity of the main body 36 (housing 36H).
  • the groove 36G extends in the axial direction similarly to the recess 34A.
  • a key 39 is fixed to fit into the groove 36G.
  • the key 39 functions as a protrusion 33A.
  • a portion of the key 39 is inserted into the recess 34A of the outer ring 3.
  • part of the key 39 is inserted into the groove 36G and the other part is inserted into the recess 34A. Therefore, in FIGS. 17 and 18, a first direction (protrusion extension direction 35A) radially connecting the center through which the rotation axis O of the bearing 2 passes and the protrusion 33A, and a radial connection between the center and the acceleration sensor 15 are shown.
  • the angle formed by the second direction (acceleration sensor detection direction 35B) connected to the direction is zero degrees. This is because the recess extension direction 35C is the same as the protrusion extension direction 35A.
  • the protrusion 33A may be fixed to the groove 36G of the main body 36.
  • the "fixing" of the key 39 to the main body 36 (groove 36G) is a concept similar to fixing by press fitting the outer ring 3 and the holding member 12 in the fixed ring integrated member in Embodiment 1 (however, it is more (The fixing force is a little weak.)
  • the key 39 is pushed into the groove 36G and is held and fitted so that it is difficult to move due to the narrow gap. Although it is easy to remove the key 39 from the groove 36G, it requires a certain amount of pulling force. This state is herein referred to as the key 39 being "fixed" to the main body 36 (groove portion 36G).
  • the protrusion 33A (key 39) suppresses unintended displacement of the bearing device 1 in the circumferential direction, and the acceleration sensor 15 fixed to the fixed ring It is securely fixed to the main body 36. Therefore, acceleration can be measured more accurately.
  • the first fitting element is formed on the outer ring 3, which is a fixed ring.
  • a recess 34A is formed as the first fitting element.
  • a mechanical device 37 according to the third example of the fifth embodiment includes a bearing device 1 and a main body 36 to which the bearing device 1 is fixed.
  • the main body 36 is formed with a cavity in which the bearing device 1 can be accommodated.
  • the main body 36 extends from the cavity along the axial direction and contributes to fitting with the first fitting element (recess 34A) (indirectly or directly with the recess 34A, which is the first fitting element).
  • a second mating element is formed which is mated with the second mating element.
  • the second fitting element is a recess (groove 36G). If the fixing force of the key 39 (pin 38) by fitting in the groove 36G is strong, the second fitting element may include the key 39 (pin 38) as a protrusion. In this case, the second mating element (key 39) is directly mated with the first mating element, as described above.
  • the recess 34A, the groove 36G, and the key 39 (pin 38) of the third example of the fifth embodiment extend along the axial direction, they also extend along the radial direction. This is because the recess 34A, the groove 36G, and the key 39 (pin 38) extend along a direction radially extending from the rotation axis O, and have a radial dimension.
  • FIG. 19 is a diagram of a fourth example of the bearing device according to Embodiment 5, viewed from the sensor unit side.
  • a bearing device 1 of a fourth example of the fifth embodiment is basically the same as the bearing device 1 of the third example of the fifth embodiment shown in FIG.
  • the protrusion 33A key 39
  • FIG. 19 is structurally different from FIG. 17 in which the protrusion is not fixed to the recess 34A. Therefore, the fourth example in FIG. 19 is similar to the first embodiment in FIG. 5, except that the recess 34A extends in the axial direction and the key 39 is fixed therein (however, the key 39 in FIG. 19 is fixed).
  • the applied force may be weaker than that of the protrusion 33A in FIG. 5). This is because the recess 34A of the first embodiment extends in the radial direction, and the protrusion 33A, which is not a key, is fixed to the outer ring 3 of the bearing device 1.
  • FIG. 20 is a diagram of a bearing device according to a fourth example of Embodiment 5 attached to a main body, viewed from the sensor unit side, for explaining the effects of the fourth example of Embodiment 5. .
  • a key 39 is fixed to fit into the recess 34A.
  • a portion of the key 39 is inserted into the groove 36G of the main body 36.
  • the first fitting element is formed on the outer ring 3, which is a fixed ring.
  • the fourth example of the fifth embodiment includes a recess 34A and a key 39 as the first fitting element.
  • a mechanical device 37 according to a fourth example of the fifth embodiment includes a bearing device 1 and a main body 36 to which the bearing device 1 is fixed.
  • the main body 36 is formed with a cavity in which the bearing device 1 can be accommodated.
  • the main body 36 extends from the cavity along the radial and axial directions and contributes to the fitting with the first fitting element (the recess 34A) (indirectly with the recess 34A or with the recess 34A and the key).
  • a second mating element (which is directly mated with 39) is formed.
  • the second fitting element is a recess (groove 36G).
  • the first fitting element may include the key 39 (pin 38) as a protrusion.
  • the second fitting element groove portion 36G is directly fitted with the first fitting element (key 39).
  • the protrusion 33A may be fixed to the outer ring 3 of the bearing device 1, or may be fixed to the inner ring 4.
  • the protrusion 33A (key 39) may be fixed to the main body 36 as in the third example.
  • the pin 38 and the key 39 suppress unintended displacement of the bearing device 1 in the circumferential direction and fix it.
  • the acceleration sensor 15 fixed to the wheel is securely fixed to the main body 36. Therefore, acceleration can be measured more accurately.
  • the acceleration sensor 15 detects the acceleration of the bearing 2 in the radial direction. Therefore, the third and fourth examples of the present embodiment are not limited to the examples in which the recess 34A is formed in the vertically upward direction as shown in FIGS. 17 and 19. For example, in FIGS. 17 and 19, it is assumed that there is a protrusion or the like in the vertically upward direction of the hollow portion of the main body 36 (housing 36H) that houses the bearing device 1 (not shown). A recess 34A is arranged. However, the present invention is not limited to this.
  • the recess extension direction is in that direction. 35C may be extended.
  • the acceleration sensor detection direction 35B may also point to 2 o'clock on the clock.
  • the recess extension direction 35C may extend in any direction other than the above.
  • it is preferable that the recess 34A of the bearing device 1 is arranged so that the acceleration sensor detection direction 35B substantially coincides with the direction in which radial vibration is desired to be detected.
  • FIG. 21 is a cross-sectional view of a first example of a bearing device according to Embodiment 6 in a plane including the rotating shaft.
  • a bearing device 1 of the first example of the sixth embodiment is basically the same as the bearing device 1 of the first embodiment shown in FIG.
  • the recess 34A is formed by a certain depth along the axial direction from the axial end surface 50 of the outer ring 3.
  • a projection 33A is embedded in the recess 34A and protrudes from the recess 34A so as to extend outward in the axial direction.
  • the protrusion 33A is fixed to the recess 34A of the outer ring 3.
  • the protrusion 33A may be similar to the protrusion 33A of the first embodiment.
  • the protrusion 33A may be the pin or key of the fifth embodiment.
  • FIG. 22 is a cross-sectional view in a plane including the rotating shaft, showing a state in which the bearing device according to the first example of Embodiment 6 is attached to the main body, for explaining the effects of the first example of Embodiment 6. It is a diagram.
  • FIG. 23 is a diagram of a state in which the bearing device according to the first example of Embodiment 6 is attached to the main body, viewed from the sensor unit side, for explaining the effects of the first example of Embodiment 6. . Referring to FIGS.
  • a protrusion 33A as a first fitting element protrudes from within the outer ring 3 that is a part of the fixed ring integral member, and the protrusion 33A protrudes from within the outer ring 3 in the axial direction. It may protrude so as to extend.
  • the projection 33A protruding from the end surface 50 in the axial direction is inserted into the groove 36G (second fitting element) of the housing 36H to fit them together.
  • FIG. 24 is a cross-sectional view of a second example of the bearing device according to Embodiment 6 in a plane including the rotating shaft.
  • a second example bearing device 1 is basically the same as the first example bearing device 1 of the sixth embodiment.
  • the recess 34A is formed by cutting a portion of both the axial end surface 50 and the radial outermost surface 3c of the outer ring 3.
  • the recessed portion 34A is formed by cutting a part of the outer edge of the outer ring 3.
  • the axial dimension of the recess 34A (in the left-right direction in the figure) is larger (deeper) than the axial dimension of the protrusion 33A to be inserted therein.
  • the radial dimension (vertical direction in the drawing) of the recess 34A may be slightly larger than the radial dimension of the protrusion 33A so that the protrusion 33A can be inserted therein.
  • the depth direction of the recess 34A may be slightly larger than the dimension of the protrusion 33A in the depth direction of the paper so that the protrusion 33A can be inserted therein.
  • the recess 34A is formed by cutting using an end mill.
  • FIG. 25 is a cross-sectional view in a plane including the rotating shaft, showing a state in which the bearing device according to the second example of Embodiment 6 is attached to the main body, for explaining the effects of the second example of Embodiment 6. It is a diagram. Referring to FIG. 25, a protrusion 33A inserted and fitted into a recess 34A formed in the second example is fixed so as to protrude in the axial direction from a groove 36G of a housing 36H.
  • a key 39 may be fixed to the main body 36 (housing 36H) as the protrusion 33A (the key 39 directly fits into the first fitting element (recess 34A) as the protrusion of the second fitting element).
  • the protrusion 33A in FIG. 25 may be similar to the protrusion 33A in the first embodiment.
  • the main body 36 (housing 36H) may not have the groove 36G, and the housing 36H and the protrusion 33A may be machined into one piece.
  • the second fitting element is only the protrusion 33A.
  • the key 39 When the key 39 is not fixed to the main body 36, the key 39 can be inserted into and removed from the bearing device 1 (the second fitting element (groove 36G) does not fit into the first fitting element (recess 34A), By allowing the key 39 to be placed between them, it indirectly contributes to the fitting with the first fitting element).
  • the first fitting element is formed on the outer ring 3 or the inner ring 4, which is a fixed ring.
  • the acceleration sensor 15 fixed to the fixed ring is securely fixed to the main body 36, and acceleration can be measured more accurately.
  • the first fitting element is formed in the holding member 12 included in the fixed ring integral member. This will be explained below.
  • FIG. 26 is a cross-sectional view of the first example of the bearing device according to Embodiment 7 in a plane including the rotating shaft.
  • the bearing device 1 of this embodiment is basically the same as the bearing device 1 of each of the above examples.
  • the recessed portion 34A as the first fitting element is formed by both the outer ring 3 and the holding member 12 that constitute the fixed ring integral member.
  • the holding member 12 is located inside the surface (axial end surface 11) of the outer ring 3 in the axial direction (left side in FIG. 26) in a part of the outer peripheral portion 12C (see FIG. 3). ) is formed with a cutout so that the end thereof is located at. Since the missing portion is formed, the surface of the first notch portion 3a is partially exposed and has an exposed notch portion 34C. The space portion surrounded by the outer edge surface of the outer circumferential portion 12C recessed inward by the missing portion and the exposed cutout portion 34C of the first cutout portion 3a is the recessed portion 34A. The recess 34A extends along the axial direction.
  • the recess 34A is a part of the outer periphery of the holding member 12 cut out.
  • the recess 34A is open on the end surface 11 side (the right side in FIG. 26) of the bearing 2 (outer ring 3).
  • the holding member 12 is fixed to the fixed ring (outer ring 3) in the fixed ring integrated member.
  • the first fitting element includes a first notch portion 3a (exposed cutout portion 34C) formed in the outer ring 3 and capable of fixing the holding member 12, and a first notch portion 3a (notch exposed portion 34C) that is formed in the outer ring 3, and a first notch portion 3a (notch exposed portion 34C) that is formed in the outer ring 3 and that the holding member 12 is This is a recessed portion 34A formed from a notched portion cut out on the inside in the axial direction.
  • FIG. 27 is a cross section in a plane including the rotating shaft, showing a state in which the bearing device according to the first example of Embodiment 7 is attached to a main body, for explaining the effects of the first example of Embodiment 7. It is a diagram.
  • FIG. 28 is a diagram of a state in which the bearing device according to the first example of Embodiment 7 is attached to the main body, viewed from the sensor unit side, for explaining the effects of the first example of Embodiment 7. .
  • the mechanical device 37 of the first example of the present embodiment like the others, includes a bearing device 1 and a main body 36 in which a cavity in which the bearing device 1 can be housed is formed.
  • the main body 36 is provided with a main body fixing member 60 (corresponding to "fixing member” in the claims).
  • the main body fixing member 60 may be considered to be included in the main body 36 (a part of the main body 36).
  • a second fitting element is formed on the main body fixing member 60.
  • the second mating element contributes to the mating with the first mating element.
  • the second fitting element is a protrusion 60A that protrudes from the main body fixing member 60 so as to extend in the axial direction.
  • the protrusion 60A is formed on the main body fixing member 60 and is a part of the main body fixing member 60 (for example, a relatively inner region in the radial direction). In other words, the protrusion 60A is included in the main body fixing member 60.
  • the protrusion 60A may be cut so as to be integrated with the main body fixing member 60.
  • the protrusion 60A is a separate member from the main body fixing member 60, and may be connected and fixed to the main body fixing member 60.
  • the protrusion 60A is considered to be a part of the main body fixing member 60 here.
  • the protrusion 60A is provided so as to be able to face the recess 34A in the axial direction.
  • the protrusion 60A extends in the axial direction from the end surface 11 of the outer ring 3 to the inner side of the outer ring 3 (left side in FIG. 27). As a result, the concave portion 34A (which is an uneven portion) and the protrusion portion 60A are directly fitted into each other, and the main body 36 is fixed to the bearing device 1.
  • a through hole 60b is provided in a part of the main body fixing member 60.
  • the through hole 60b is formed in a portion where the fixing member 60 contacts the main body 36.
  • a bolt 61 is inserted into the through hole 60b.
  • the main body fixing member 60 is fixed to the housing 36H of the main body 36. In this state, at least a portion of the protrusion 60A is inserted into the recess 34A along the axial direction.
  • a recess 34A is formed on the bearing device 1 side. Therefore, similarly to the third example of the fifth embodiment in FIG. 17, the recess extension direction 35C (first direction) radially connecting the center through which the rotation axis O of the bearing 2 passes and the recess 34A is shown in FIG. It is shown.
  • the embodiments 1 to 36 in which the first fitting element is formed in the holding member 12 of the fixed ring integral member are also applicable. It has the same effect as 6.
  • the bearing device 1 is securely fixed to the main body 36. Therefore, the acceleration sensor 15 fixed to the fixed ring is securely fixed to the main body 36, and acceleration can be measured more accurately.
  • FIG. 29 is a cross-sectional view of a second example of the bearing device according to Embodiment 7, taken on a plane including the rotating shaft.
  • the bearing device 1 of this embodiment is basically the same as the bearing device 1 of each of the above examples.
  • the protrusion 33A as the first fitting element is formed on the holding member 12 that constitutes the fixed ring integral member.
  • the holding member 12 is axially outward (in FIG. 9) with respect to the surface (axial end surface 11) of the outer ring 3 in a part of the outer peripheral portion 12C (see FIG. 3).
  • the protrusion 33A protrudes toward the right side). That is, in the bearing device 1 of the second example of the present embodiment, the first fitting element is the protrusion 33A of the holding member 12 that protrudes outward in the axial direction with respect to the surface (end surface 11) of the outer ring 3.
  • FIG. 30 is a cross section in a plane including the rotating shaft, showing a state in which the bearing device according to the second example of Embodiment 7 is attached to the main body, for explaining the effects of the second example of Embodiment 7. It is a diagram.
  • FIG. 31 is a view of a bearing device according to a second example of Embodiment 7 attached to a main body, viewed from the sensor unit side, for explaining the effects of the second example of Embodiment 7. .
  • the mechanical device 37 of the second example of the present embodiment has basically the same configuration as the mechanical device 37 of the first example of FIGS. 27 and 28.
  • the second fitting element is a recess (groove 60G) formed in the main body fixing member 60.
  • the groove 60G has a certain depth in the axial direction (extending in the axial direction) in a part of the main body fixing member 60 (for example, a relatively inner region in the radial direction) so that it can face the protrusion 33A in the axial direction. ).
  • the groove portion 60G which is an uneven portion
  • the projection portion 33A are directly fitted into each other, and the main body 36 is fixed to the bearing device 1.
  • the second example is similar to the first example in that the bearing device 1 and the main body 36 are fixed via the main body fixing member 60, and the first fitting element is formed on the holding member 12 of the fixed ring integral member.
  • the second example differs from the first example in that the protrusion 33A of the first fitting element is formed on the bearing device 1 side. Therefore, similarly to Embodiment 1, a protrusion extension direction 35A (first direction) that radially connects the center through which the rotation axis O of the bearing 2 passes and the protrusion 33A is shown in FIG. .
  • the second example having the above configuration also has the same effects as the first example.
  • FIG. 32 is a plane including a rotating shaft, showing a state in which a bearing device according to a first example of Embodiment 8 is attached to a main body, for explaining the configuration and effects of the first example of Embodiment 8.
  • FIG. 33 is a diagram of a state in which the bearing device according to the first example of Embodiment 8 is attached to the main body, viewed from the sensor unit side, for explaining the effects of the first example of Embodiment 8. .
  • 32 and 33 in this embodiment, as in the second example of Embodiment 6, both the axial surface (end surface 11) and the radial outermost surface 3c of outer ring 3 are A recessed portion 34A (first fitting element) is formed by cutting the portion.
  • a main body fixing member 60 is provided on the main body 36, and this includes a protrusion 60A (protrusion 33A) as a second fitting element.
  • the first fitting element may be formed on the fixed ring (outer ring 3) instead of the holding member 12.
  • FIG. 34 is a plane including a rotating shaft, showing a state in which a bearing device according to a second example of Embodiment 8 is attached to a main body, for explaining the configuration and effects of the second example of Embodiment 8.
  • FIG. FIG. 35 is a view of a bearing device according to a second example of Embodiment 8 attached to a main body, viewed from the sensor unit side, for explaining the effects of the second example of Embodiment 8. .
  • a recess 34A extending in the axial direction as a first fitting element is formed in the outer ring 3, and a pin (along the axial direction) as a protrusion 33A is formed therein.
  • a groove portion 60G (extending in the axial direction) as a second fitting element is formed in the main body fixing member 60 provided on the main body 36. There is. Such a configuration may be used. By fitting the protrusion 33A and the groove 60G, the same effects as in each of the above embodiments can be obtained.
  • a bearing including an outer ring, an inner ring and rolling elements, and an acceleration sensor that detects vibrations of the bearing
  • a first fitting element is formed in a fixed ring integral member that includes a fixed ring that is either the outer ring or the inner ring and is integrated with the fixed ring, The first fitting element is at least one of a recess and a protrusion,
  • a bearing including an outer ring, an inner ring and rolling elements, an acceleration sensor that detects vibrations of the bearing; a holding member fixed to either the outer ring or the inner ring, A fixed ring integral member is formed in which the fixed ring and the holding member are integrated, including a fixed ring that is either the outer ring or the inner ring, a first fitting element is formed on the fixed ring integral member; The first fitting element is at least one of a recess and a protrusion, A bearing device in which the acceleration sensor is fixed to the fixed ring integral member.
  • a magnetic ring fixed to a rotating ring which is either the outer ring or the inner ring, and having north and south poles alternately magnetized
  • a stator that houses a coil and includes a holding member fixed to the fixed ring so as to face the magnetic ring and the bearing in a radial direction
  • a wireless communication circuit that wirelessly transmits the output of the acceleration sensor to the outside
  • a power supply circuit capable of adjusting the output from a generator including the magnetic ring and the stator
  • the bearing device according to supplementary note 1, further comprising a circuit board on which the acceleration sensor, the wireless communication circuit, and the power supply circuit are mounted.
  • the holding member is fixed to the fixed ring
  • the first fitting element includes a cutout portion formed in the fixed ring and capable of fixing the holding member, and a cutout portion in which the holding member is notched inward in the axial direction with respect to the surface of the fixed ring.
  • a mechanical device comprising a main body to which the bearing device is fixed, The main body is formed with a cavity in which the bearing device can be housed, A second fitting element that contributes to fitting with the first fitting element is formed in the main body so as to extend in a radial direction from the cavity, A mechanical device, wherein the second fitting element is at least one of a recess and a protrusion.
  • a mechanical device comprising a main body to which the bearing device is fixed, The main body is formed with a cavity in which the bearing device can be housed, A second fitting element that contributes to fitting with the first fitting element is formed in the main body so as to extend from the cavity along the axial direction, A mechanical device, wherein the second fitting element is at least one of a recess and a protrusion.
  • a mechanical device comprising a main body to which the bearing device is fixed, The main body is formed with a cavity in which the bearing device can be housed, The main body is provided with a fixing member in which a second fitting element that contributes to fitting with the first fitting element is formed, A mechanical device, wherein the second fitting element is at least one of a recess and a protrusion.
  • a bearing 2 including an outer ring 3, an inner ring 4, and rolling elements 8, and an acceleration sensor 15 that detects vibrations of the bearing 2, and a fixed ring, which is either the outer ring 3 or the inner ring 4, receives the acceleration.
  • the sensor 15 is fixed, and a part of the fixing member (protrusion 33A, pin 38, key 39) is accommodated in the fixing ring, and a hole (recess 34A) from which the other part of the fixing member can be protruded is provided. , notch portion 34B) is formed.
  • the stator 5 includes a holding member 12 fixed to the fixed ring so as to face the fixed ring as a component, and stores the coil 24 (part of the stator 5A and the stator 5B specifically stores the coil 24), and a wireless communication circuit 18 that wirelessly transmits the output of the sensor 15 to the outside; a power supply circuit 17 that can adjust the output from the generator G that is composed of the magnetic ring 7 and the stator 5; the acceleration sensor 15;
  • the bearing device 1 according to (2) or (3), further comprising a circuit board 13 on which the wireless communication circuit 18 and the power supply circuit 17 are mounted.
  • a first direction that radially connects the center through which the rotation axis O of the bearing 2 passes and the protrusion 33A, and connects the center and the acceleration sensor 15 in the radial direction.
  • the bearing device 1 according to any one of (2) to (5), wherein the angle formed by the second direction (acceleration sensor detection direction 35B) is zero degrees.
  • a first direction that radially connects the center through which the rotation axis O of the bearing 2 passes and the protrusion 33A, and connects the center and the acceleration sensor 15 in the radial direction.
  • the bearing device 1 according to any one of (2) to (5), wherein the angle formed by the second direction (acceleration sensor detection direction 35B) is 180 degrees.
  • the protrusion 33A extends radially from the holding member 12, the protrusion 33A is fixed to the holding member 12, and the protrusion 33A is inserted into the notch 34B formed in the fixed ring.
  • the bearing device 1 according to (4) or (5).
  • the acceleration sensor 15 is arranged in an annular space between the outer ring 3 and the inner ring 4 and closer to the rolling elements 8 than the ends of the outer ring 3 and the inner ring 4, (1) to ( 10) The bearing device 1 according to any one of items 10) to 10).
  • a mechanical device 37 comprising the bearing device 1 according to any one of (2) to (10) and a main body 36 to which the bearing device 1 is fixed, wherein the main body 36 includes the above-mentioned A mechanical device in which a cavity in which the bearing device 1 can be housed is formed, and a groove 36G into which the projection 33A is inserted is formed in the main body 36 so as to extend radially outward from the cavity. 37.
  • the protrusion extension direction 35A radially connects the center through which the rotation axis O of the bearing 2 passes and the protrusion 33A, and the acceleration radially connects the center and the position where the acceleration sensor 15 is arranged.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)

Abstract

L'invention concerne un dispositif de palier (1), comprenant un palier (2) et un capteur d'accélération (15). Le palier (2) comprend une cage extérieure (3), une cage intérieure (4) et des éléments roulants (8). Le capteur d'accélération (15) détecte les vibrations du palier (2). Un premier élément d'accouplement (33A) est formé dans un élément intégré à cage fixe qui comprend une cage fixe, celle-ci étant soit la cage extérieure (3), soit la cage intérieure (4), et qui est intégré à la cage fixe. Le premier élément d'accouplement (33A) est au moins l'une d'une partie évidée et d'une partie saillante. Le capteur d'accélération (15) est fixé à l'élément intégré à cage fixe.
PCT/JP2023/033296 2022-09-13 2023-09-13 Dispositif de palier et dispositif mécanique Ceased WO2024058199A1 (fr)

Applications Claiming Priority (4)

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JP2022145440 2022-09-13
JP2022-145440 2022-09-13
JP2023-147527 2023-09-12
JP2023147527A JP2024041062A (ja) 2022-09-13 2023-09-12 軸受装置および機械装置

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WO2024058199A1 true WO2024058199A1 (fr) 2024-03-21

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3161253A1 (fr) * 2024-04-10 2025-10-17 Skf Dispositif de palier à isolation électrique intégrée, notamment pour moteur ou machine électrique, et procédés de fabrication associés

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WO2012080779A1 (fr) * 2010-12-17 2012-06-21 Aktiebolaget Skf Ensemble de détection de rotation, ensemble palier comprenant un tel ensemble de détection de rotation et appareil équipé d'un tel ensemble palier
US20120169166A1 (en) * 2009-07-03 2012-07-05 Schaeffler Technologies Gmbh & Co. Kg Bearing having a power generation unit
JP2013006488A (ja) * 2011-06-23 2013-01-10 Ntn Corp 車輪用軸受装置
JP2021127831A (ja) * 2020-02-14 2021-09-02 Ntn株式会社 軸受装置、間座および製造方法

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Publication number Priority date Publication date Assignee Title
JP2005233290A (ja) * 2004-02-19 2005-09-02 Nsk Ltd センサ付軸受装置
US20120169166A1 (en) * 2009-07-03 2012-07-05 Schaeffler Technologies Gmbh & Co. Kg Bearing having a power generation unit
WO2012080779A1 (fr) * 2010-12-17 2012-06-21 Aktiebolaget Skf Ensemble de détection de rotation, ensemble palier comprenant un tel ensemble de détection de rotation et appareil équipé d'un tel ensemble palier
JP2013006488A (ja) * 2011-06-23 2013-01-10 Ntn Corp 車輪用軸受装置
JP2021127831A (ja) * 2020-02-14 2021-09-02 Ntn株式会社 軸受装置、間座および製造方法

Cited By (1)

* Cited by examiner, † Cited by third party
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FR3161253A1 (fr) * 2024-04-10 2025-10-17 Skf Dispositif de palier à isolation électrique intégrée, notamment pour moteur ou machine électrique, et procédés de fabrication associés

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