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WO2019001869A1 - Moteur électrique - Google Patents

Moteur électrique Download PDF

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Publication number
WO2019001869A1
WO2019001869A1 PCT/EP2018/063912 EP2018063912W WO2019001869A1 WO 2019001869 A1 WO2019001869 A1 WO 2019001869A1 EP 2018063912 W EP2018063912 W EP 2018063912W WO 2019001869 A1 WO2019001869 A1 WO 2019001869A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing
electric motor
motor shaft
face
rotor
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/EP2018/063912
Other languages
German (de)
English (en)
Inventor
Harald Merz
Charles Gommenginger
Peter Kalchschmidt
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO2019001869A1 publication Critical patent/WO2019001869A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2786—Outer rotors
    • H02K1/2787—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/2788—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of a single magnet or two or more axially juxtaposed single magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • 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
    • F16C41/002—Conductive elements, e.g. to prevent static electricity
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/02—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for suppression of electromagnetic interference
    • H02K11/028—Suppressors associated with the rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/40—Structural association with grounding devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1737—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/003—Couplings; Details of shafts
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/086—Structural association with bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
    • H02K7/088—Structural association with bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly radially supporting the rotor directly
    • 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
    • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
    • F16C19/546—Systems with spaced apart rolling bearings including at least one angular contact bearing
    • 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
    • F16C2380/00—Electrical apparatus
    • F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/22—Contacts for co-operating by abutting
    • H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted
    • H01R13/2464—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the contact point
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/64—Devices for uninterrupted current collection
    • H01R39/643—Devices for uninterrupted current collection through ball or roller bearing

Definitions

  • the invention relates to an electric motor with a contact element according to the preamble of the independent claims.
  • the invention is based on an electric motor, in particular an external rotor motor, with a rotor, a stator and a motor shaft, wherein the motor shaft has an axis of rotation about which rotor and stator are rotatably mounted to each other via a bearing, and wherein the motor shaft has a free end with a
  • Contacting element has a first section and a second section, wherein the first portion is arranged in the region of the bearing and the second portion on the end face of the motor shaft to this movable, in particular rotatably abuts.
  • the contacting element can be installed in a particularly space-saving and easy. Since the contacting of the motor shaft additionally takes place on the front side of the motor shaft, unwanted squeaking noises can be minimized, which often occur especially with a radial contacting of the motor shaft and are distracting. These unwanted squeaking noises in a radial contact often arise due to natural vibrations in which the components get by uneven rubbing and sliding of the radial contact on the motor shaft.
  • an imaginary axis can be understood by a rotation axis about which a body, in particular the rotor, rotates in the sense of a rotation axis.
  • the term motor shaft an objective machine element to be understood, which transmits a torque.
  • an end face of the motor shaft can be understood as that surface of the motor shaft which delimits the motor shaft laterally in the direction of the axis of rotation.
  • the term end face is not limited to a flat surface, but the end face may have any surface contour.
  • the motor shaft for example, in Motor carrier or stator be clamped.
  • the motor shaft itself is clamped in the rotor and rotates together with the rotor in the stator or engine block.
  • the electric motor is an external rotor motor.
  • the shielding effect of the rotor itself is made use of.
  • a further development is characterized in that the second section comprises at least one elastic element, the elastic element pressing in the axial direction onto the end face of the motor shaft.
  • the elastic element which has a bias in the installed state in the axial direction, the elastic element exerts a compressive force on the end face. In this way, a permanent contact between the elastic element and the end face of the motor shaft can be ensured.
  • Direction has a certain elasticity, that is in the sense of a spring in the installed state can apply a restoring force on the face.
  • the axial direction essentially means the direction of extension of the axis of rotation. It is not necessary that it extends the entire contact force with which the elastic element presses on the end face, in the direction of the axis of rotation. It is also conceivable that the contact force is arranged at a certain angle to the end face and the force vector of the contact pressure has a vertical and a vertical portion. Essential to the invention here is only that the force vector of the contact pressure in the axial direction is the largest in terms of magnitude.
  • the elastic element is designed as a radially extending bending beam, wherein the bending beam is connected to the first portion.
  • a bending beam can be understood as a rod-shaped element which is stressed transversely to its main axis.
  • This may be, for example, a bending beam with a rectangular cross-section.
  • the invention is not limited to such an embodiment, other cross-sectional shapes of the bending beam are conceivable.
  • the bearing comprises at least one bearing, which is arranged at the free end of the motor shaft.
  • the bearing comprises at least one bearing, which is arranged at the free end of the motor shaft.
  • bridging route can be kept low.
  • the bearing of the bearing is designed as a rolling bearing.
  • rolling bearings have a variety of electrically conductive materials.
  • the electric motor acting forces are additionally improved.
  • the shielding of electrical interference radiation can be provided in a preferred manner in that the first portion of the Kunststoffieriatas for axial fixation of the bearing bears against the bearing.
  • axial fixation can be understood to mean a transmission of forces in the axial direction, wherein, as already explained, the direction of the axis of rotation is essentially understood to mean under the axial direction.
  • the bearing has an inner ring and an outer ring, wherein the inner ring is rotatably connected to the motor shaft and wherein the outer ring rests against a bearing seat and wherein the first portion of the contacting the outer ring is supported in the axial direction.
  • support means the transmission of force.
  • the bearing seat can be in this case
  • a securing element can be understood to mean a fastening element in the form of a clamping disk, a nut, a sleeve, a threaded nut, a clamping element, a securing ring or a plug-in nut.
  • the securing element is designed as a speed groove
  • the securing of the bearing can be made particularly simple and secure.
  • the speed groove is braced or clawed with the radially outer rotor wall, which avoids shifting the speed groove in the axial direction after the speed groove has been mounted.
  • Electric motor according to the invention comprises the elastic element of
  • the support area is curved.
  • Such a curved embodiment of the support area can be made particularly simple and inexpensive by Anlagen réelleumformen the bending beam.
  • curved can be understood to mean any surface contour which has a curvature or curvature.
  • a curved contour can be formed for example by a support area, which has a convex or semicircular shape.
  • the arched structure is not limited to a curvature of the entire end face. It is also conceivable and sufficient for functional fulfillment that, for example, only a section of the end face is arched. Such a cutout may, for example, be an area arranged at the midpoint of the end face.
  • the effect of the minimized friction can be utilized in a particularly preferred manner in a further embodiment in that the end face of the motor shaft of the electric motor according to the invention is designed to taper in the direction of the axis of rotation. Due to the tapered end face, the bearing surface of the contacting reduces on the shaft, whereby the friction is reduced.
  • Such an embodiment of the electric motor according to the invention enables a simple and accurate centering of the
  • Contacting element and motor shaft can be miniert in the contact area.
  • the contacting element is designed to reduce electromagnetic interference radiation. In this way, the emission of unfavorable interference can be substantially reduced.
  • the contact element according to the invention is particularly suitable for being used in such an electric motor which has a stator and a rotor and a motor shaft. Due to its embodiment with a first and a second portion, wherein in the installed state, the first portion is disposed in the region of the bearing and the second portion on the end face of the motor shaft to this movable, in particular rotatably abuts and wherein the second portion at least one axially elastic Element comprises and presses the axially elastic member on the end face of the motor shaft, the contact element according to the invention can be derived in a particularly advantageous manner interfering radiation and secure the bearing in the axial direction. At the same time, the functional integration of securing and contacting enables cost optimization and quick and easy installation.
  • Contacting element is designed as a securing element, in particular as a speed groove.
  • Figure 1 is a schematic sectional view of an inventive
  • FIG. 2 shows a section of the electric motor according to the invention in an enlarged view analogously to FIG. 1,
  • FIG. 3 shows a second embodiment of the electric motor according to the invention
  • Figure 4 is a perspective view of a section of a
  • FIG. 1 shows a sectional view of an electric motor 10 embodied by way of example as an external rotor motor.
  • the electric motor can in particular as
  • Fan motor in HVAC systems or for cooling an internal combustion engine in a vehicle or for driving a fan, a gearbox, a pump or an actuator can be used.
  • the electric motor 10 has a fixed part, the stator 12 and a
  • External rotor motor as exemplified in Figure 1, is characterized in that the radially inner part is fixed during operation, while the radially outer part rotates.
  • a plurality of windings 16 is arranged on the stator 12.
  • the rotor 14 in turn has magnets 18.
  • Windings 16 are traversed by current, this generates the magnetic field of the electric motor 10.
  • the electric motor 10 is shown in Figure 1 only schematically, since structure and functionality of a suitable electric motor are well known in the prior art, so here for the purpose
  • Invention can also be found in an internal rotor motor application.
  • the windings 16 of electric motors are fed in operation usually with pulse width modulated signals that can cause interference.
  • the electromagnetic interference occurs here usually at the
  • the interference radiation can lead to disruption of other electronic systems and components which are arranged in the vicinity of the electric motor 10.
  • the interference radiation can lead to disruption of other electronic systems and components which are arranged in the vicinity of the electric motor 10.
  • the electric motor 10 should therefore shield windings 16 and magnets 18 as possible in all directions.
  • a shield can be achieved inter alia by a rotor 14 arranged as close as possible to the stator 12.
  • the rotor 14 is formed substantially cup-shaped.
  • This cup-shaped design of the rotor 14 in this case forms a shield for the windings 16 and magnets 18, which are arranged within the cup-shaped rotor 14.
  • the pot-shaped rotor 14 has for this purpose a radially extending in the first portion 20.
  • This first portion 20 of the rotor 14 forms the bottom of the cup-shaped rotor 14.
  • the Rotor has a second portion 22 which is disposed on the outer edge of the rotor 14 and forms a circumferential side wall of the rotor 14.
  • the open area of the rotor opposite the bottom 20 of the cup-shaped rotor 14 is shielded by a motor carrier 24, as can be clearly seen in FIG. Due to the arrangement of the cup-shaped rotor 14 and acting as a cover motor carrier 24 results in a substantially
  • the motor shaft 26 is rotatably connected to the motor carrier 24 and the stator 12, respectively. Such a rotationally fixed connection can be provided in particular by injecting the motor shaft 26 into the motor carrier 24. As shown in Figure 1, the motor shaft 26 has a free end 30 and a rotation axis 32 about which the rotor 14 and the stator 12 are rotatably mounted to each other.
  • the axis of rotation 32 extends in the sense of an infinitely extending imaginary straight line in particular centrally through the motor shaft 26 and corresponds to the central axis of the motor shaft 26.
  • the pot-shaped rotor 14 For rotatable mounting of the rotor 14 relative to the stator 12 about the axis of rotation 32 points the pot-shaped rotor 14 on its side facing the motor shaft 26 on a bearing seat 36 which extends in the axial direction.
  • a bearing 38 is arranged inside the bearing seat 36 of the rotor 14.
  • the bearing 38 has two bearings 40, 42, wherein both bearings 40, 42 with their respective outer ring 44 in the bearing seat 36 of the rotor and with their corresponding inner ring 46 via a press fit rotationally fixed on the motor shaft 26 sit ,
  • the rotor 14 In order to prevent the rotor 14 from taking over the function of a high-frequency antenna and possibly worsening the interference problem, the rotor 14 has to be replaced be contacted to a ground potential 34.
  • the rotor 14 must be electrically conductively connected to the motor shaft 26, which in turn is pressed into the motor carrier 24 and thus abuts the ground potential 34.
  • Such a coupling between the rotor 14 and the motor shaft 26 can not be provided via the bearings 40, 42 as a rule, since they have an oil-filled bearing gap, which has the consequence that no sufficiently stable Ohmic connection can be provided ,
  • an electrically conductive contacting element 48 is disposed between the stator 12 and the rotor 14.
  • the Kunststoffierelement 48 causes the reduction of potential differences between the rotor 14 and stator 12 of the electric motor 10.
  • the contact element 48 according to the invention, as explained in more detail below, additionally assumes the function of a bearing locking element.
  • bearings 40, 42 shown in Figure 1 are shown by way of example only as a rolling bearing, in particular as a ball bearing. It is also conceivable that other types of bearings, such as plain bearings apply. However, all these types of bearings have in common that they are due to the lubrication or their nature are not able to provide a sufficiently stable Ohmic connection between the rotor 14 and the motor shaft 26 in terms of a Greierimplantations 48.
  • the second bearing 42 assumes the function of a fixed bearing, that is, it is able to position the motor shaft 26 in the axial direction clearly.
  • the second bearing 42 must be both radial as well Also absorb axial forces and can lead into the surrounding structure.
  • neither the outer ring 44 in the bearing seat 36 nor the inner ring 46 is displaceable on the motor shaft 26, whereby the fixing of the motor shaft 26 in
  • the inner ring 46 of the second bearing 42 is fixed for this purpose at your the free end 30 of the motor shaft 26 facing side via a locking ring 50 on the motor shaft 26.
  • an inventive electric motor 10 is not limited to an axial fixation of the inner ring 46 via a locking ring 50. It can also other security elements, such as nuts or
  • the outer ring 44 of the second bearing 42 is fixed at its the free end 30 of the motor shaft 26 opposite sides via a spacer sleeve.
  • Bearing arrangement and securing the first bearing 40 can be modified or modified in various ways, without departing from the spirit.
  • the contacting element 48 has a first and a second portion 52, 54.
  • the first portion 52 of the Wegieriatas 48 is annular
  • the annular securing element or the first section 52 of the contacting element 48 is designed, for example, as a speed groove, as a spring washer or as a spring.
  • Support area 58 is so large that a sufficiently stable ohmic
  • the contacting element 48 has, in addition to the first section 52, a second section 54.
  • an elastic element 56 which presses in the axial direction, that is, in the direction of the axis of rotation 32 on the motor shaft 26.
  • the elastic element 56 is preferably designed as a bending beam, which has a rectangular cross-section.
  • the contacting of the motor shaft 26 takes place, as clearly shown in FIG End face 60 of the motor shaft 26. In this way, an axial contact can be provided by which unwanted squeaking noises are minimized. These occur in particular in a radial contact of the
  • the elastic element 56 is installed with a defined preload, so that the elastic element 56 is pressed with sufficient functional performance pressing force in the axial direction of the end face 60, that is, the elastic member 56 acts in the sense of a spring, which restoring force on the end face 60 applies.
  • the contacting on the end face 60 optimally takes place centrally in the area of the rotation axis 32, so that relative movements and
  • the contacting element 48 is movably in particular rotatably on the end face 60 of the motor shaft 26 at.
  • Figure 1 shows a one-piece contact element 48, which
  • the contacting element 48 is not limited to such an embodiment shown in FIG. So are, for example
  • Embodiments are conceivable in which the first and second sections 52, 54 are produced in two parts and are connected to one another in an additional production step.
  • FIGS. 2 to 4 each show embodiments of the invention
  • FIG. 2 shows a detail of the invention
  • Contacting element 48 has a first and a second section 50, 52.
  • the first portion 52 is formed as an annular speed groove and is located with his Support area 58 on the outer ring 44 of the second bearing 42 at.
  • the radially outer tabs 59 of the second portion 54 are hooked to the bearing seat 36 of the rotor 14. In this way, the outer ring 44 of the second bearing 42 is secured in the axial direction.
  • Integrally connected to the first section 52 is the second section 54, which is designed as a bending beam and has at least one elastic element 56.
  • the second section 54 of the contacting element 48 contacts the motor shaft 26 centrally on the end face 60.
  • the second section 54 is designed as a substantially constructed shaped element.
  • a bridging section 62 which runs essentially perpendicular to the elastic element 56 and merges into the first section 52 of the contacting element 48, adjoins the elastic element 56, which extends substantially in the radial direction.
  • First and second sections 52, 54 together form the substantially L-shaped form of the second section 54.
  • the elastic element 56 has a region 66 tapering in the direction of the end face 60.
  • this tapered region 66 is formed as a curved, in particular as a semicircular element, so that the contact surface of the elastic element 56 on the end surface 60 is minimized by the only punctiform support.
  • the tapered portion 66 is not limited to a semi-circular one as shown in FIG Embodiment. There are also other tapered shapes are conceivable, which are adapted to contact the motor shaft 26 in the smallest possible contact area 64 frontally axially.
  • FIG. 2 shows an embodiment in which end face 60 of motor shaft 26 is designed as a substantially planar surface extending in the radial direction. Only for improved sliding of the bearings 40, 42 and securing elements 50 on the motor shaft 26, this has a chamfer 68. However, it should be expressly mentioned at this point that such a chamfer 68 does not represent an end face running in the direction of the axis of rotation in the sense of the invention according to a further embodiment.
  • FIG. 3 shows a further embodiment of the invention
  • rotationally symmetric tapered end face 60 which has been tapered to a substantial extent, are also other tapered shapes, such as a curved or
  • Semicircular end face 60 conceivable and sufficient for functional fulfillment.
  • FIG. 4 shows a perspective view of such a tapered end face 60, which is formed by a contacting element 46 according to the invention or the elastic element designed as a bending beam with a rectangular cross-section Element 56 is contacted.
  • the second section 54 is L-shaped, wherein the elastic element 56 presses on the motor shaft 26 in the axial direction.
  • the bending beam has a rectangular cross-sectional shape which has a significantly lower height than width, since this is produced, in particular, by stamping and bending technology from a sheet with a small thickness.
  • the end face 60 is formed tapered and forms a truncated cone whose top surface is smaller by a multiple than the base surface, that is, the cross-sectional area of the motor shaft 26.
  • the top surface of the truncated cone body forms the bearing surface of the elastic element 56. It is also conceivable that the tapered end face 60 forms a cone, insofar as the support surface is sufficient for dissipating the electromagnetic interference radiation.
  • the configuration of the end face and / or the support area can be adapted to the permissible relative speeds, coefficients of friction and squeaking noises.
  • the design of the contacting as a one-piece or two-part component can be adapted to product requirements such as the cost of the component or the retrofitting of an existing system.
  • the electric motor 10 drives the electric motor 10 according to the invention.
  • the electric motor 10 can also be used in a pump, in particular a coolant pump, or an interior ventilation system of a vehicle.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Motor Or Generator Frames (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

L'invention concerne un moteur électrique, en particulier un moteur à induit extérieur, comportant un rotor, un stator et un arbre de moteur. Ledit arbre de moteur comprend un axe de rotation autour duquel le rotor et le stator sont montés de manière rotative l'un par rapport à l'autre par le biais d'un palier et l'arbre de moteur comporte une extrémité libre doté d'une surface frontale, et un élément de contact électrique est disposé entre le rotor et le stator. Selon l'invention, l'élément de contact comprend une première et une seconde section, la première section étant disposée dans la zone du palier et la seconde section étant mobile, en particulier rotative par rapport au palier au niveau de la surface frontale de l'arbre de moteur.
PCT/EP2018/063912 2017-06-28 2018-05-28 Moteur électrique Ceased WO2019001869A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017210867.3A DE102017210867A1 (de) 2017-06-28 2017-06-28 Elektromotor
DE102017210867.3 2017-06-28

Publications (1)

Publication Number Publication Date
WO2019001869A1 true WO2019001869A1 (fr) 2019-01-03

Family

ID=62455472

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/063912 Ceased WO2019001869A1 (fr) 2017-06-28 2018-05-28 Moteur électrique

Country Status (2)

Country Link
DE (1) DE102017210867A1 (fr)
WO (1) WO2019001869A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019207241A1 (de) * 2019-05-17 2020-11-19 Zf Friedrichshafen Ag Vorrichtung zur elektrisch leitfähigen Verbindung zwischen einer Welle und einem Gehäuse
DE102019133886B4 (de) 2019-12-11 2024-12-05 Schaeffler Technologies AG & Co. KG Ableitvorrichtung mit Luftdurchlass sowie elektrische Antriebsanordnung mit der Ableitvorrichtung
DE102022002744A1 (de) 2022-07-28 2022-09-15 Mercedes-Benz Group AG Wälzlager für eine elektrische Maschine
KR20250057614A (ko) * 2023-10-20 2025-04-29 엔 에스 케이-와너 가부시키가이샤 구름 베어링용 전해 부식 방지 부재 및 전해 부식 방지 구름 베어링 유닛
FR3158601A1 (fr) * 2024-01-18 2025-07-25 Ampere Sas Élément conducteur électrique pour une machine électrique tournante.

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US5454724A (en) * 1994-07-22 1995-10-03 Seagate Technology, Inc. Floating electrical contact for spindle motor
JP2002146568A (ja) * 2000-11-06 2002-05-22 Tsurumi Mfg Co Ltd 水中回転機械の電食防止装置
JP2002295492A (ja) * 2001-03-30 2002-10-09 Tsurumi Mfg Co Ltd 導通軸受
JP2009243695A (ja) * 2009-07-31 2009-10-22 Ntn Corp 通電軸受
DE102012201545A1 (de) 2011-12-29 2013-07-04 Robert Bosch Gmbh Vorrichtung zum Schirmen von elektromagnetischer Störstrahlung eines Elektromotors

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5454724A (en) * 1994-07-22 1995-10-03 Seagate Technology, Inc. Floating electrical contact for spindle motor
JP2002146568A (ja) * 2000-11-06 2002-05-22 Tsurumi Mfg Co Ltd 水中回転機械の電食防止装置
JP2002295492A (ja) * 2001-03-30 2002-10-09 Tsurumi Mfg Co Ltd 導通軸受
JP2009243695A (ja) * 2009-07-31 2009-10-22 Ntn Corp 通電軸受
DE102012201545A1 (de) 2011-12-29 2013-07-04 Robert Bosch Gmbh Vorrichtung zum Schirmen von elektromagnetischer Störstrahlung eines Elektromotors

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