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WO2011078103A1 - Joint homocinétique à trépied - Google Patents

Joint homocinétique à trépied Download PDF

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Publication number
WO2011078103A1
WO2011078103A1 PCT/JP2010/072854 JP2010072854W WO2011078103A1 WO 2011078103 A1 WO2011078103 A1 WO 2011078103A1 JP 2010072854 W JP2010072854 W JP 2010072854W WO 2011078103 A1 WO2011078103 A1 WO 2011078103A1
Authority
WO
WIPO (PCT)
Prior art keywords
roller
joint member
constant velocity
velocity universal
outer joint
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/JP2010/072854
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English (en)
Japanese (ja)
Inventor
裕志 村上
達朗 杉山
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
Application filed by NTN Corp, NTN Toyo Bearing Co Ltd filed Critical NTN Corp
Publication of WO2011078103A1 publication Critical patent/WO2011078103A1/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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/202—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints
    • F16D3/205—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part
    • F16D3/2055—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part having three pins, i.e. true tripod joints
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/202—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints
    • F16D2003/2026—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints with trunnion rings, i.e. with tripod joints having rollers supported by a ring on the trunnion

Definitions

  • the present invention is used in power transmission systems of automobiles, airplanes, ships, and various industrial machines, and is incorporated into a drive shaft, a propeller shaft, etc. used in, for example, a 4WD vehicle, an FR vehicle, etc.
  • the present invention relates to a tripod type constant velocity universal joint which is a kind of a sliding type constant velocity universal joint that allows axial displacement and angular displacement between them.
  • constant velocity universal joints such as fixed constant velocity universal joints and sliding constant velocity universal joints, that are built into drive shafts and propeller shafts that transmit rotational force from automobile engines to wheels at constant speed.
  • Both of these constant velocity universal joints have a structure in which two shafts on the driving side and the driven side are connected so that rotational torque can be transmitted at a constant speed even if the two shafts have an operating angle.
  • the drive shaft that transmits power from the engine of the automobile to the driving wheel needs to correspond to the angular displacement and axial displacement due to the change in the relative positional relationship between the engine and the wheel, the engine side (inboard side) ) And a fixed constant velocity universal joint on the drive wheel side (outboard side), and a structure in which both constant velocity universal joints are connected by a shaft.
  • tripod constant velocity universal joint One of the sliding constant velocity universal joints assembled to this drive shaft is a tripod constant velocity universal joint.
  • This tripod type constant velocity universal joint has a cup shape having an opening at one end, three track grooves extending in the axial direction are formed on the inner peripheral surface, and roller guides facing each other on the inner wall of each track groove
  • An outer joint member formed with a surface, a tripod member having three leg shafts projecting in the radial direction, and rotatably supported by the leg shaft of the tripod member and rolling in a track groove of the outer joint member And a roller guided along the roller guide surface to form a main portion, and an internal component including the roller and the tripod member is accommodated in the outer joint member so as to be slidable in the axial direction.
  • the tripod type constant velocity universal joint When assembling this type of tripod type constant velocity universal joint to an automobile, the tripod type constant velocity universal joint is assembled on the engine side (inboard side), and then the fixed type constant velocity universal joint is installed on the drive wheel side (outboard side). ) Is generally assembled. On the drive wheel side, the hub bearing is assembled to the fixed type constant velocity universal joint and assembled to the suspension system of the vehicle body by the knuckle. When the hub bearing is assembled to the fixed type constant velocity universal joint, the hub bearing and the knuckle are attached to the vehicle body. Since the tripod type constant velocity universal joint is not assembled to the suspension device, a total load (for example, 0.3 kN or more) of the fixed type constant velocity universal joint, the hub bearing, and the knuckle may be applied. When such a load is applied to the tripod type constant velocity universal joint, a slide over may occur in which the internal part jumps out of the opening of the outer joint member. Therefore, conventionally, in order to prevent this slide-over, the following retaining mechanism is employed
  • a pair of left and right spherical recesses that open to the outer sides of the roller guide surface of the outer joint member and a pair of left and right spheres that extend to the closed side are formed on the upper and lower sides of the opening end of the roller guide surface.
  • convex portions are arranged (see, for example, Patent Document 2). With such a structure, when the internal component is displaced in the axial direction, the roller interferes with the spherical convex portion, thereby restricting the axial displacement amount of the roller.
  • a protruding portion is formed on the inner peripheral surface of the opening of the outer joint member by crushing the inner edge of the opening end face of the outer joint member by caulking (for example, a patent) Reference 3).
  • Japanese Utility Model Publication No. 10-194 Japanese Utility Model Publication No. 58-30027 Japanese Patent Laid-Open No. 11-336782
  • the present invention has been proposed in view of the above-mentioned problems, and the object of the present invention is to eliminate the need for turning and dedicated equipment, and to easily realize reliable retaining by simple means and the machining process.
  • An object of the present invention is to provide a tripod type constant velocity universal joint that can be simplified and cost can be reduced.
  • the present invention has a cup shape having an opening at one end, and three track grooves extending in the axial direction are formed on the inner peripheral surface.
  • An outer joint member having roller guide surfaces facing each other on the inner wall, a tripod member having three leg shafts projecting in the radial direction, and an outer joint supported rotatably on the leg shaft of the tripod member
  • a tripod in which an inner part including the roller and the tripod member is accommodated in the outer joint member so as to be axially slidable.
  • a constant velocity universal joint of the outer joint member is formed by forging the outer joint member on the inner peripheral surface of the outer joint member on the roller guide surface of at least one side of the track groove. Characterized by providing simultaneous molding.
  • At least one side means that a convex portion is provided on one side of a pair of roller guide surfaces facing each other on the inner wall of the track groove, or a convex portion is provided on both sides of the pair of roller guide surfaces. Means to include both.
  • the tripod type constant velocity universal joint since the inner peripheral surface of the opening of the outer joint member is provided with a convex portion for locking the roller of the internal component on the roller guide surface on at least one side of the track groove, By restricting the amount of axial displacement of the internal component by the roller interfering with the convex portion during axial displacement, it is possible to prevent the internal component from sliding out from the opening of the outer joint member.
  • this tripod type constant velocity universal joint is assembled to a car as a drive shaft, even if the total load of the fixed type constant velocity universal joint, hub bearing and knuckle is applied to the tripod type constant velocity universal joint, the internal parts are the outer joint members. This is effective in that it is possible to surely prevent a slide-over jumping out from the opening of the.
  • the convex part is formed by forging the outer joint member at the same time, so that it can be used for turning for forming an annular groove like the conventional one, another part such as a circlip, and a caulking jig.
  • a dedicated facility for positioning the outer joint member can be dispensed with, and variations in the size of the convex portion are unlikely to occur, and the convex portion can be formed with high accuracy.
  • the retaining function can be surely exhibited by a simple means of simultaneous forming by forging of the outer joint member, and the machining process can be simplified and the cost can be reduced.
  • the tightening margin between the convex portion and the roller is preferably 0.2 to 0.8 mm.
  • the tightening margin between the convex portion and the roller is smaller than 0.2 mm, the resistance becomes too small, so that the mold can be easily pulled out during forging of the outer joint member, and the convex portion can be simultaneously formed. It can be easily realized, and the inner part can be easily press-fitted into the outer joint member when the inner part is assembled to the outer joint member. On the other hand, when the internal part is displaced in the axial direction, the roller is securely locked to the convex part. It is unsuitable because it is difficult to do.
  • the convex portion in the present invention is provided with a tapered surface that is inclined with respect to the joint axis and reaches the roller guide surface on the side opposite to the opening of the outer joint member. In this way, the resistance is reduced by the tapered surface, which is effective in that it is easier to pull out the mold during forging of the outer joint member and it is possible to more easily realize the simultaneous forming of the convex portion. It is.
  • the taper surface of the convex portion in the present invention has a taper angle of 45 ° or less. In this way, when the internal part is displaced in the axial direction, the interference between the roller and the convex portion is ensured, and the taper angle is small, so that it becomes even easier to pull out the mold when forging the outer joint member. Thus, it is effective in that the simultaneous forming of the convex portions can be realized more easily. If the taper angle is larger than 45 °, it is not suitable because it is difficult to draw the mold during forging of the outer joint member and it becomes difficult to simultaneously form the convex portions.
  • the convex portion in the present invention is provided at least at the roller contact position of the roller guide surface. In this way, for example, even when the tightening margin between the convex portion and the roller is reduced, it is effective in that the roller can be reliably locked to the convex portion when the internal component is displaced in the axial direction. is there.
  • “at least the roller contact position” means that it is possible to provide a convex portion at a portion other than the roller contact position.
  • the convex part is provided in a part other than the roller contact position on the roller guide surface, for example, if the tightening margin between the convex part and the roller is increased, the roller is locked to the convex part when the internal component is displaced in the axial direction. Is possible.
  • the convex portion in the present invention is desirably provided in a region having a width of 1 mm from the roller contact position of the roller guide surface to both sides in the radial direction.
  • the movement amount of the roller in the radial direction may be set to 1 mm or less. Therefore, if a convex portion is provided in a region having a width of 1 mm from the roller contact position of the roller guide surface to both sides in the radial direction, even if the roller moves in the radial direction within that region, the roller is securely locked to the convex portion. It is effective in that it can be made to.
  • the form in which the roller in the present invention contacts the roller guide surface may be either an angular contact or a circular contact.
  • convex portions are formed at roller contact positions located at two locations in the radial direction of the roller guide surface.
  • a convex portion is formed at the roller contact position (outer joint member PCD) located at one place in the radial direction of the roller guide surface.
  • the “outer joint member PCD” means the PCD (pitch circle diameter) of the roller in contact with the roller guide surface of the track groove of the outer joint member.
  • the roller in the present invention is an outer roller arranged on the outer peripheral side of the inner roller fitted on the leg shaft, the inner peripheral surface of the inner roller has a convex arc shape, and the leg shaft is orthogonal to the axis of the joint in the longitudinal section.
  • the present invention is effective when applied to a double roller type tripod type constant velocity universal joint.
  • the present invention can also be applied to other than the double roller type, for example, a single roller type tripod type constant velocity universal joint.
  • At least one roller guide surface of the track groove on the inner peripheral surface of the opening of the outer joint member is provided with a convex portion that is engaged with the roller of the internal component. Since the roller interferes with the convex portion to restrict the amount of axial displacement of the internal component, it is possible to prevent the internal component from sliding out from the opening of the outer joint member.
  • the convex part is formed by forging the outer joint member at the same time, so that it can be used for turning for forming an annular concave groove as in the past, another part such as a circlip, and a caulking jig
  • a dedicated facility for positioning the outer joint member can be dispensed with, and variations in the size of the convex portion are unlikely to occur, and the convex portion can be formed with high accuracy.
  • the retaining function can be surely exhibited by a simple means of simultaneous forming by forging of the outer joint member, and the machining process can be simplified and the cost can be reduced.
  • FIG. 3 is a partial enlarged cross-sectional view taken along line BB in FIG. 1.
  • It is a principal part expanded sectional view which shows the case where an outer roller makes an angular contact with an outer joint member.
  • It is a principal part expanded sectional view which shows the case where an outer roller makes circular contact with an outer joint member.
  • tripod type constant velocity universal joints will be described in detail below.
  • a double roller type tripod type constant velocity universal joint capable of reducing vibration during operation will be exemplified.
  • the present invention can be applied to other tripod type constant velocity universal joints such as a single roller type in addition to the double roller type.
  • FIG. 1 and 2 show the basic structure of a double roller type tripod type constant velocity universal joint
  • FIG. 1 shows a longitudinal section with respect to the axis of the joint
  • FIG. 2 shows an arrow view seen from the direction A in FIG. (However, only one roller unit 30 is shown in cross section).
  • the outer joint member 10 the tripod member 20, and the roller unit 30 constitute main parts.
  • the outer joint member 10 has a cup shape having an opening 11 at one end, and a rotation shaft (for example, a drive shaft) (not shown) is integrally formed at the center of the bottom.
  • a rotation shaft for example, a drive shaft
  • Three linear track grooves 12 extending in the axial direction are formed on the inner peripheral surface of the outer joint member 10 at equal intervals in the circumferential direction.
  • Each track groove 12 has a pair of roller guide surfaces 14 opposed to each other on both inner walls thereof.
  • the roller guide surface 14 has an arc-shaped cross section and extends linearly in the axial direction of the outer joint member 10.
  • On the outer peripheral surface of the outer joint member 10, a portion corresponding to the space between the track grooves 12 is thinned to reduce the weight, and a recess 13 is formed in the axial direction.
  • Internal parts including the tripod member 20 and the roller unit 30 are accommodated in the outer joint member 10.
  • the roller unit 30 includes an outer roller 32, an inner roller 34 that is disposed inside the outer roller 32 and is externally fitted to the leg shaft 22, and a needle roller 36 that is interposed between the outer roller 32 and the inner roller 34. It is comprised and is accommodated in the track groove 12 of the outer joint member 10.
  • the inner peripheral surface of the inner roller 34 has a convex arc shape.
  • a plurality of needle rollers 36 are disposed between the inner roller 34 and the outer roller 32 in a so-called single row full roller state without a cage.
  • the inner roller 34 and the needle roller 36 are fitted with ring-shaped washers 31, 33 in annular grooves formed on the inner peripheral surface of the outer roller 32, and are prevented from coming off from the outer roller 32 by the washers 31, 33. .
  • the tripod member 20 has three leg shafts 22 integrally formed radially at equal intervals in the circumferential direction (120 ° intervals) on the outer peripheral surface of a cylindrical boss portion 21.
  • the front end of the leg shaft 22 extends in the radial direction to the vicinity of the bottom surface of the track groove 12.
  • the shaft end of the rotating shaft 40 (for example, a driven shaft) is connected to the shaft hole of the boss 21 by spline fitting, and is prevented from coming off from the tripod member 20 by an annular snap ring 42.
  • the leg shaft 22 of the tripod member 20 has a straight shape perpendicular to the axis of the joint in the longitudinal section with respect to the axis, and as shown in FIG.
  • an elliptical shape that contacts the inner roller 34 is formed, and a gap n is formed between the inner roller 34 and the inner roller 34 in the axial direction of the joint.
  • the roller unit 30 is rotatably supported on the leg shaft 22 having such a shape.
  • a gap n is formed between the leg shaft 22 and the inner roller 34 in the axial direction of the joint, and the leg shaft 22 is tiltable with respect to the roller unit 30 that rolls on the roller guide surface 14. Therefore, even if the joint takes an operating angle, the roller unit 30 does not tilt with respect to the roller guide surface 14. In this way, the roller unit 30 and the roller guide surface 14 are prevented from being obliquely crossed with the inclination of the leg shaft 22, thereby reducing induced thrust and slide resistance.
  • the following retaining mechanism is employed in order to prevent a slide-over in which internal parts including the tripod member 20 and the roller unit 30 jump out of the opening 11 of the outer joint member 10. To do.
  • the tripod type constant velocity universal joint has a pair of rollers facing each other on both inner walls of the track groove 12 on the inner peripheral surface of the opening 11 of the outer joint member 10.
  • the guide surface 14 is provided with a structure in which a convex portion 15 to which an outer roller 32 as an internal part is locked is provided.
  • the convex portions 15 are provided on the roller guide surfaces 14 of all three track grooves 12 is illustrated, but the convex portions 15 are projected on at least one of the track grooves 12.
  • the portion 15 may be provided, and the convex portion 15 may be provided only on the roller guide surface 14 located on one side of the pair of roller guide surfaces 14 located on both sides of the track groove 12.
  • the outer joint member 10 is manufactured, for example, by forming a material made of medium carbon steel into a general shape by forging, and then performing turning, high-frequency heat treatment, grinding, and the like.
  • the convex portion 15 as the internal component retaining mechanism is simultaneously formed by forging the outer joint member 10 described above. Moreover, the above-mentioned convex part 15 does not need to perform the hardening process by heat processing.
  • the convex portion 15 is simultaneously formed by forging the outer joint member 10, so that it can be turned into another part such as a conventional circular concave groove, a circlip, or a caulking jig.
  • a dedicated facility for positioning the outer joint member can be eliminated, the size of the convex portion 15 hardly varies, and the convex portion 15 can be formed with high accuracy.
  • the retaining function can be surely exhibited by a simple means of simultaneous forming by forging of the outer joint member 10, and the machining process can be simplified and the cost can be reduced.
  • the convex part 15 which the outer roller 32 of an internal component latches was provided in the roller guide surface 14 of the both sides of the track groove 12 in the inner peripheral surface of the opening part 11 of the outer joint member 10. From the above, when the internal component is displaced in the axial direction, the outer roller 32 interferes with the convex portion 15 to restrict the amount of axial displacement of the internal component, thereby causing the internal component to slide out from the opening 11 of the outer joint member 10. It can be prevented in advance.
  • this tripod type constant velocity universal joint when this tripod type constant velocity universal joint is assembled to a car as a drive shaft, the inner part is an outer joint member even if the total load of the fixed type constant velocity universal joint, hub bearing and knuckle is applied to the tripod type constant velocity universal joint.
  • the slide over which jumps out from the 10 opening parts 11 can be prevented reliably.
  • the convex portion 15 is simultaneously formed by forging the outer joint member 10, it is necessary to provide a concave portion corresponding to the convex portion 15 in the mold used for the forging.
  • a die is press-fitted into the outer joint member 10 to form its internal shape (track groove 12 and roller guide surface 14). Pulled out.
  • the concave portion of the mold becomes a resistance against the outer joint member 10.
  • the outer roller 32 of the roller unit 30 is connected to the outer joint because the convex portion 15 of the outer joint member 10 becomes a resistance against the inner part. It press-fits into the track groove 12 of the member 10.
  • the tightening margin between the convex portion 15 and the outer roller 32 is set to 0.2 to 0.8 mm.
  • the internal component pull-out force when the operating angle of the constant velocity universal joint is 0 ° is 1.0 kN.
  • the tightening margin is 0.8 mm the operating angle of the constant velocity universal joint is The pull-out force of the internal parts at 0 ° is 6.5 kN.
  • the outer roller 32 can be reliably locked to the convex portion 15 when the internal component is displaced in the axial direction.
  • the outer joint member 10 is forged, since the resistance due to the concave portion of the mold is small, it is easy to pull out the mold, and it is possible to easily form the convex portion 15 at the same time, and to suppress the life reduction of the mold.
  • the inner part is assembled to the outer joint member 10, since the resistance by the convex portion 15 of the outer joint member 10 is small, the inner part can be easily press-fitted into the outer joint member 10.
  • the tightening margin between the convex portion 15 and the outer roller 32 is smaller than 0.2 mm, the resistance due to the concave portion of the mold is small at the time of forging the outer joint member 10, so that the mold can be easily pulled out. It is possible to easily form the portion 15 at the same time, and when the inner part is assembled to the outer joint member 10, the resistance of the convex part 15 of the outer joint member 10 is small, so that the inner part is attached to the outer joint member 10. Although it can be easily press-fitted, it is not suitable because it is difficult to securely lock the outer roller 32 to the convex portion 15 when the internal component is displaced in the axial direction.
  • the outer roller 32 can be reliably locked to the convex portion 15 when the internal component is displaced in the axial direction.
  • the resistance due to the concave portion of the mold is large, it is difficult to pull out the mold and it becomes difficult to form the convex portion 15 at the same time.
  • the resistance due to the convex portion 15 of the outer joint member 10 is large, it is difficult to press-fit the internal component into the outer joint member 10.
  • the removal force of the internal parts is also equivalent. That is, for one track groove 12, the total height of the convex portions 15 is the same regardless of whether the convex portions 15 are provided on the roller guide surface 14 on one side or the convex portions 15 are provided on the roller guide surfaces 14 on both sides. If there is, the removal force of the internal parts is equivalent. Therefore, it is preferable to provide the mold with the same removal force of the internal parts by providing the convex portions 15 at half the height on the roller guide surfaces 14 on both sides, rather than providing the convex portions 15 on the roller guide surface 14 on one side. It is more effective to provide the convex portions 15 on the roller guide surfaces 14 on both sides in that it can be easily pulled out and the life of the mold can be improved.
  • FIG. 4 is an enlarged partial cross-sectional view taken along the line BB in FIG. 1 and shows the convex portion 15 provided on the roller guide surface 14.
  • the convex portion 15 is provided with a tapered surface 16 that is inclined with respect to the joint axis and reaches the roller guide surface 14 on the side opposite to the opening of the outer joint member 10.
  • a reverse tapered surface is formed corresponding to the concave portion of the mold. Since the resistance due to the concave portion of the mold is further reduced at the time of forging, it is easier to pull out the mold and simultaneously form the convex portion 15 than when the tapered surface 16 is not provided. At the same time, it is possible to suppress a decrease in the life of the mold.
  • the taper surface 16 of the convex portion 15 has a taper angle ⁇ of 45 ° or less. In this way, by restricting the taper angle ⁇ to 45 ° or less, when the internal component is displaced in the axial direction, the interference between the outer roller 32 and the convex portion 15 is ensured and the taper angle ⁇ is small.
  • the member 10 is forged, the resistance due to the concave portion of the mold is further reduced, the mold can be easily pulled out, and the convex portion 15 can be easily formed at the same time, and the decrease in the life of the mold can also be suppressed. .
  • the taper angle ⁇ is larger than 45 °, the resistance due to the concave portion of the mold is increased during the forging of the outer joint member 10, so that it is difficult to pull out the mold, and the convex portion 15 is simultaneously formed. And the life of the mold is reduced.
  • FIG. 5 shows a cross section of the roller guide surface 14 at a portion where the convex portion 15 (see FIG. 6) is not formed.
  • the convex portion 15 is provided at the roller contact position P of the roller guide surface 14 as shown in FIG.
  • the convex portion 15 is provided at the roller contact position P of the roller guide surface 14 as described above, for example, when the tightening margin between the convex portion 15 and the outer roller 32 is reduced within the range of 0.2 to 0.8 mm described above. Even so, the outer roller 32 can be reliably locked to the convex portion 15 when the internal component is displaced in the axial direction.
  • the convex part 15 in parts other than the roller contact position P. Even if the convex portion 15 is provided at a portion other than the roller contact position P of the roller guide surface 14, for example, if the tightening margin between the convex portion 15 and the outer roller 32 is increased within the range of 0.2 to 0.8 mm described above. The outer roller 32 can be locked to the convex portion 15 when the internal component is displaced in the axial direction.
  • the convex portion 15 is provided in a region R having a width W of 1 mm from the roller contact position P of the roller guide surface 14 to both sides in the radial direction.
  • the movement amount of the outer roller 32 in the radial direction may be set to 1 mm or less. Therefore, even if the outer roller 32 moves in the radial direction in the region R by providing the convex portion 15 in the region R having a width W of 1 mm on both sides in the radial direction from the roller contact position P of the roller guide surface 14 as described above. The outer roller 32 can be reliably locked to the convex portion 15.
  • FIG. 7 illustrates a case where the outer roller 32 is in circular contact with the roller guide surface 14 ′.
  • the outer peripheral surface of the outer roller 32 comes into contact with one place (roller contact position P ′) in the radial direction of the roller guide surface 14 ′.
  • the roller contact position P ′ in the circular contact is the outer joint member PCD, that is, the PCD (pitch circle diameter) of the outer roller 32 in a state of contacting the roller guide surface 14 ′ of the track groove 12 of the outer joint member 10.
  • FIG. 7 shows a cross section of the roller guide surface 14 ′ at a portion where the convex portion 15 ′ (see FIG. 8) is not formed.
  • the convex portion 15 ' is provided at the roller contact position P' of the roller guide surface 14 '.
  • a convex portion 15 ′ is provided in a region R ′ having a 1 mm width W ′ on both sides in the radial direction from the roller contact position P ′ of the roller guide surface 14 ′. Note that the embodiment in the case of this circular contact also has the same effect as the embodiment in the case of the above-described angular contact, and therefore redundant description is omitted.

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

L'invention concerne un joint homocinétique à trépied, qui comprend un élément de joint extérieur (10) en forme de coupelle, muni d'une ouverture (11) dans une de ses extrémités, et qui présente trois rainures de guidage (12) formées dans sa surface périphérique intérieure et qui s'étendent dans la direction axiale. Chaque rainure de guidage (12) présente des faces (14) de guidage de rouleaux formées sur la paroi intérieure de la rainure de guidage, de manière à ce qu'elles soient en regard l'une de l'autre. Le joint homocinétique comporte également un élément formant trépied (20) présentant trois pattes (22) saillant radialement et des unités de rouleaux (30) supportées à rotation sur les pattes (22) de l'élément formant trépied (20). Chaque unité de rouleau est en l'occurrence insérée à roulement dans la rainure de guidage (12) de l'élément de joint extérieur (10) et est guidée le long des faces (14) de guidage de rouleaux. Les composants intérieurs, y compris les unités de rouleaux (30) et l'élément formant trépied (20), sont contenus à l'intérieur de l'élément de joint extérieur (10) de manière à pouvoir coulisser dans la direction axiale. Des saillies (15) qui s'engagent avec les unités de rouleaux (30), qui sont les composants intérieurs, sont forgées conjointement avec l'élément de joint extérieur (10), et sont formées sur les faces (14) de guidage de rouleaux qui sont situées sur des côtés opposés de chaque rainure de guidage (12) sur la surface périphérique intérieure de l'ouverture (11) de l'élément de joint extérieur (10).
PCT/JP2010/072854 2009-12-22 2010-12-20 Joint homocinétique à trépied Ceased WO2011078103A1 (fr)

Applications Claiming Priority (4)

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JP2009290873 2009-12-22
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JP2010282067A JP2011149551A (ja) 2009-12-22 2010-12-17 トリポード型等速自在継手

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WO2020166504A1 (fr) * 2019-02-13 2020-08-20 Ntn株式会社 Élément de liaison externe pour joint universel homocinétique de type coulissant, et joint universel homocinétique de type coulissant
EP4119810A4 (fr) * 2020-03-11 2024-02-21 NTN Corporation Élément de joint externe pour joint universel homocinétique coulissant de type plongeant, joint universel homocinétique coulissant de type plongeant et procédé de traitement de prévention de détachement

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WO2020166507A1 (fr) * 2019-02-13 2020-08-20 Ntn株式会社 Organe raccord externe destiné à un accouplement universel de type coulissant à vitesse constante, accouplement universel de type coulissant à vitesse constante, dispositif de formation de saillie
JP7139263B2 (ja) * 2019-02-13 2022-09-20 Ntn株式会社 摺動式等速自在継手用外側継手部材、及び摺動式等速自在継手

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JP2008008474A (ja) * 2006-06-30 2008-01-17 Ntn Corp 固定式等速自在継手
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JPH11336782A (ja) * 1998-05-04 1999-12-07 Gkn Loebro Gmbh 分解防止手段を備えた定速度押し込み継ぎ手
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JP2006153135A (ja) * 2004-11-29 2006-06-15 Toyoda Mach Works Ltd 等速ジョイント、等速ジョイントの加工方法および等速ジョイントの組付方法ならびに等速ジョイントの組付冶具
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Publication number Priority date Publication date Assignee Title
WO2020166504A1 (fr) * 2019-02-13 2020-08-20 Ntn株式会社 Élément de liaison externe pour joint universel homocinétique de type coulissant, et joint universel homocinétique de type coulissant
JP2020133659A (ja) * 2019-02-13 2020-08-31 Ntn株式会社 摺動式等速自在継手用外側継手部材、及び摺動式等速自在継手
JP7179637B2 (ja) 2019-02-13 2022-11-29 Ntn株式会社 摺動式等速自在継手用外側継手部材、及び摺動式等速自在継手
EP4119810A4 (fr) * 2020-03-11 2024-02-21 NTN Corporation Élément de joint externe pour joint universel homocinétique coulissant de type plongeant, joint universel homocinétique coulissant de type plongeant et procédé de traitement de prévention de détachement

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