JP2009097709A - Sliding-type constant velocity universal joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate disassembly/assembly and operatability of a sliding-type constant velocity universal joint. <P>SOLUTION: The sliding-type constant velocity universal joint comprises an outer joint member 10 connected to a drive shaft or a driven shaft, an inner joint member 20 connected to the driven shaft or the drive shaft, and a torque transmission element 30 for transmitting torque between the outer joint member 10 and the inner joint member 20. The torque transmission element 30 is movable along a track formed in the outer joint member 10, and a slip-off prevention device is provided at the opening end of the outer joint member 10, whereby the outer joint member 10, the inner joint member 20 contained in the outer joint member 10 and the torque transmission element 30 can be made in a cassette form and can be treated as a single unit. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sliding type constant velocity universal joint used for a power transmission device of an automobile or various industrial machines. Sliding type constant velocity universal joints are capable of not only angular displacement but also axial displacement (plunging). Examples include tripod type constant velocity universal joints, double offset type constant velocity universal joints, and cross groove type constant velocity universal joints. Etc.

  The drive shaft that transmits the power from the engine of the car to the wheels consists of an intermediate shaft and a sliding constant velocity universal joint and fixed constant velocity universal joints attached to both ends of the intermediate shaft, and a differential through the sliding constant velocity universal joint. And is connected to the wheel via a fixed type constant velocity universal joint. As an example of a sliding type constant velocity universal joint, a tripod type constant velocity universal joint has a structure in which a tripod 320 as an inner joint member is inserted inside outer rings 310 and 410 as outer joint members as shown in FIG. The outer rings 310 and 410 and the tripod 320 can be displaced in the axial direction (plunging). 12A shows an example of an outer ring 310 having a circular outer cross-sectional shape, and FIG. 12B shows an outer ring having a three-valve corollary shape in which the outer cross-sectional shape is a repetition of a small diameter portion 412 and a large diameter portion 414. 410 is an example. The outer rings 310 and 410 are cup-shaped, and three track grooves 314 extending in the axial direction on the inner periphery are formed at equal intervals in the circumferential direction. The tripod 320 has three trunnion journals 326 protruding in the radial direction. A roller 330 is rotatably attached to each trunnion journal 326. The rollers 330 are accommodated in the track grooves 314 of the outer rings 310 and 410, respectively, and roll in the axial direction of the outer rings 310 and 410 along the roller guide surfaces 316 of the track grooves 314 during plunging.

  In the process of assembling the drive shaft to the vehicle body, the drive shaft may have to be tilted or made vertical. At that time, if the tripod type constant velocity universal joint is raised, the tripod 320 may fall off the outer rings 310 and 410 due to weight. For this reason, conventionally, a clip 342 is attached to the inner periphery of the open end of the outer ring 310, 410 as a tripod 320 stopper (Patent Document 1). The clip 342 is mounted in a circular (part of) groove 340 formed on the inner peripheral surface of the outer ring 310, 410, and has a smaller diameter than the circumscribed circle diameter of the roller 330 group attached to the trunnion journal 226. . Therefore, the clip 342 interferes with the roller 330 when it moves to the opening end side of the outer rings 310 and 410 to prevent the tripod 320 from coming off.

In Patent Document 2, as shown in FIG. 13, the roller guide surface 514 of the outer ring 510 of the tripod type constant velocity universal joint is cured by heat treatment leaving the opening end 544 of the outer ring 510, and an uncured opening end A technique is described in which a protrusion 546 is formed by plastic working at 544 and the protrusion 546 interferes with a roller to prevent the roller from coming off. In FIG. 13, a dotted pattern represents a region 542 cured by heat treatment.
Japanese Utility Model Publication No. 61-24528 JP 2002-235766 A

In the above prior art, whether it is the one of Patent Document 1 or Patent Document 2, after inserting the tripod and the roller integrated with the shaft into the outer ring, the clip is attached to the opening end of the outer ring, Alternatively, it is necessary to form a retaining device by performing plastic working on the outer ring, which requires much labor for assembly.
Accordingly, an object of the present invention is to facilitate assembly of a sliding type constant velocity universal joint.

  The present invention includes an outer joint member connected to a drive shaft or a driven shaft, an inner joint member connected to the driven shaft or the drive shaft, and torque for transmitting torque between the outer joint member and the inner joint member. A sliding type constant velocity universal joint, wherein the torque transmission element is movable along a track formed inside the outer joint member, and a retaining device is provided at an opening end of the outer joint member. By providing, the outer joint member, the inner joint member accommodated in the outer joint member, and the torque transmission element are made into one cassette. Here, the “cassette” means a unit that can be handled collectively without being dispersed.

The retaining device is formed, for example, by attaching a clip to the opening end of the outer joint member, or by providing a protrusion on the track on the inner side of the opening end surface of the outer joint member. be able to.
By providing the protrusion on the track, the protrusion interferes with the roller. Therefore, when the roller moves toward the opening end surface of the outer joint member, it interferes with this and restricts further movement. . In this way, the retaining can be achieved without adding a clip or the like for retaining. Further, by forming a protrusion on the back side of the opening end surface of the outer joint member, and forming an angle of 10 degrees to 60 degrees with respect to the opening end surface of the outer joint member on the processing surface of the protrusion, It is possible to effectively cause plastic deformation with a small load while suppressing unnecessary deformation of the outer joint member. Thus, the arrangement | positioning and shape of the protrusion part which comprise a retaining mechanism can be devised, and the stable pulling-out intensity | strength is securable.

  The protrusion is disposed on the back side of the opening end surface of the outer joint member, and the shape of the protrusion is such that the surface on the opening end surface side of the outer joint member forms an acute angle with respect to the opening end surface. By doing so, the protruding portion can be formed easily and at low cost. That is, the projecting portion can be processed by causing plastic deformation of the track using a caulking jig. At that time, since the processed surface of the protrusion (the surface on the opening end face side of the outer joint member) forms an angle of 10 degrees or more and 60 degrees or less with respect to the opening end face, the pushing amount of the caulking jig is the same A large amount of protrusion can be secured, and plastic deformation can be effectively caused with a small load.

  When the angle of the processed surface of the protrusion is α, the angle α is set in the range of 10 degrees to 60 degrees for the following reason. When the angle α is small, a large load is required to push the caulking jig. Therefore, the lower limit of the angle α is set to 10 degrees so that processing can be performed with a small load. On the other hand, when the angle α exceeds 60 degrees, the component force directed outward in the radial direction generated in the caulking process increases, and acts to spread the track. Therefore, the upper limit of the angle α is set to 60 degrees in order to suppress the deformation of the track. By using a caulking jig having a tapered surface as the processed surface of the protruding surface, a pair of processed surfaces can be formed simultaneously with a low load.

  The protrusion height of the protrusion from the track is preferably 0.4 mm or more. The clearance between the track of the outer joint member and the outer peripheral surface of the roller is about 0.2 mm at the maximum. Therefore, if the protruding height of the protruding portion is 0.4 mm or more, the protruding portion can be made to interfere with the roller, and the necessary removal strength can be secured stably.

  The width of the protrusion, that is, the dimension of the outer joint member in the radial direction is desirably 4 mm or more. This is because if the width of the protruding portion is narrow, the pull-out strength varies.

  A pulling strength of 490 N or more is desirable. The pull-out strength 490N means that the roller can be extracted from the outer joint member by applying a load of 490N or more to the roller in the axial direction of the outer joint member. When assembling the constant velocity universal joint to the vehicle, it is assumed that its own weight is applied to peripheral parts such as a hub, and the weight is 294 to 490 N depending on the vehicle. Therefore, in that case, the required pullout strength is 490 N or more.

  In the sliding type constant velocity universal joint, the torque transmission element transmits torque while rolling on the track, and therefore, the track is required to have a high rolling fatigue life. When the track is cured by heat treatment, the rolling fatigue life can be increased, and the joint life and torque capacity can be increased. However, when the entire track is hardened, there is a concern that the base material cracks due to insufficient ductility during the plastic working process. Therefore, in order to be able to perform the caulking process without difficulty, heat treatment is performed on the track on the back side (opposite end face side) from the protrusion. By doing so, an uncured portion having a lower hardness than the cured roller guide surface and rich in ductility is formed in the vicinity of the opening end surface, and the uncured portion is plastically deformed to form a protruding portion. Material cracking can be avoided. In order to reliably prevent the base material from cracking, it is desirable that the surface hardness of the uncured portion is set to HRC 40 or less in terms of Rockwell hardness (C scale test: the same applies hereinafter).

  Various surface hardening treatments can be used for the surface of the track. Among them, induction hardening is particularly possible, and local heating is possible, and the depth of the hardened layer can be freely selected. Therefore, it has the advantage that the performance of the base material can be maintained. Therefore, it is suitable as a heat treatment for hardening the surface of the track except for the vicinity of the opening end face of the outer joint member as described above. Of course, it is also possible to employ quenching by carburizing heat treatment.

  The present invention can be applied to a sliding type constant velocity universal joint such as a tripod type constant velocity universal joint, a double offset type constant velocity universal joint, and a cross groove type constant velocity universal joint.

  According to this invention, with the inner joint member separated from the shaft and the torque transmission element inserted into the outer ring cup, the retaining device is provided at the opening end of the outer joint member, and this is used as one cassette. When assembling a sliding type constant velocity universal joint, only grease filling, shaft insertion, and boot installation are required, which is greatly simplified.

Embodiments of the present invention will be described below with reference to the drawings.
First, the basic configuration of a tripod constant velocity universal joint will be described with reference to FIG. The tripod type constant velocity universal joint includes an outer ring 10 as an outer joint member, a tripod 20 as an inner joint member, and a roller 30 as a torque transmission element as main components.

  The outer ring 10 includes a mouse portion 12 and a stem portion 18, and is connected to one of the two shafts to be coupled with each other by a spline (or serration, hereinafter the same) shaft portion of the stem portion so that torque can be transmitted. ing. The mouse portion 12 is cup-shaped, and a track groove 14 extending in the axial direction is formed at a position equally divided into three in the circumferential direction on the inner periphery. Both side walls of the track groove 14 are roller guide surfaces 16.

  The tripod 20 includes a boss 22 and a trunnion journal 26, and is connected to the other of the two shafts to be connected to each other by a spline hole 24 formed in the axial center portion of the boss 22 so as to transmit torque. The trunnion journal 26 protrudes in the radial direction from the circumferentially divided position of the boss portion 22. Each trunnion journal 26 has a cylindrical shape, and an annular groove 28 is formed near the tip.

  The roller 30 is rotatably supported by the trunnion journal 26 via a large number of needle rollers 32. The needle rollers 32 are assembled between the trunnion journal 26 and the roller 30 in a full roller state, the outer peripheral surface of the trunnion journal 26 becomes the inner raceway surface of the needle rollers 32, and the inner peripheral surface of the roller 30 is the needle rollers 32. It becomes the outer raceway surface. An inner washer 34 and an outer washer 36 are disposed at both ends of the needle roller 32, and are prevented from coming off by a circlip 38 so as not to come out to the tip side of the trunnion journal 26.

  The outer washer 36 includes a disk portion extending in the radial direction of the trunnion journal 26 and a cylindrical portion extending in the axial direction of the trunnion journal 26. The circlip 38 is mounted in the annular groove 28 of the trunnion journal 26. Since the outer diameter of the circlip 38 attached to the annular groove 28 is larger than the inner diameter of the disk portion of the outer washer 36, the movement of the outer washer 36 toward the shaft end side of the trunnion journal 26 is restricted. Since the outer diameter of the cylindrical portion of the outer washer 36 is the same as or slightly smaller than the circumscribed circle of the needle rollers 32, the needle rollers 32 are prevented from coming off. The outer diameter of the cylindrical portion of the outer washer 36 is smaller than the inner diameter of the roller 30, and the end portion is larger than the inner diameter of the roller 30. Therefore, the roller 30 can move to a certain extent in the axial direction of the trunnion journal 26.

  1 and 2 show an example in which the inner washer 34, the outer washer 36, and the circlip 38 are omitted to reduce the component structure. In this case, the annular groove 28 of the trunnion journal 26 is also abolished. Instead, a raceway groove 32 for the needle roller 32 is formed by forming a collar 27 at the tip, and the needle roller 32 is a raceway groove 29. The movement in the axial direction is restricted by both side walls of the raceway groove 29.

  The outer ring 10 is manufactured from, for example, carbon steel having a carbon content of 0.15 to 0.60 wt% (for example, S53C) through processes such as forging, machining, heat treatment, and grinding of the stem portion 18.

  The heat treatment includes a surface hardening process for the roller guide surface 16. For example, the roller guide surface 16 is cured to HRC 55 or more by heat treatment such as quenching, and a sufficient rolling fatigue life that can withstand the rolling of the roller 36 is given. Of the roller guide surface 16, the vicinity of the opening end surface of the outer ring 10 is not subjected to heat treatment, leaving an uncured portion. And the surface hardness of this unhardened part shall be below HRC40, in order to prevent the crack generation at the time of forming the projection part 40 mentioned later. In the roller guide surface 16, the roller 36 does not roll in the vicinity of the opening end surface of the outer ring 10 where the uncured portion remains, so that no particular problem occurs even if the heat treatment is omitted. The uncured portion can be tempered by applying an appropriate heat treatment as long as the surface hardness does not exceed HRC40 in addition to leaving unquenched raw material without being heat-treated as described above. Since the uncured portion is formed only in a partial region of the roller guide surface 16 in this way, the heat treatment of the roller guide surface 16 can be controlled so that local heating is easy and there is no significant thermal influence other than the cured layer. It is preferable to use induction hardening. It is also possible to perform carburizing and quenching.

  Referring to FIGS. 1 and 2, a protrusion 40 is formed on the roller guide surface 16 near the opening end of the outer ring 10. As shown in FIGS. 3 and 4, the protrusion 40 is formed by locally plastically deforming the roller guide surface 16 by rollers that caulk the roller guide surface 16 of the outer ring 10 using a caulking jig 44. Form. In FIG. 3A, symbol B represents the dimension of the protrusion 40 in the radial direction of the outer ring 10. 3B, symbol D represents the caulking depth, symbol H represents the projecting height of the projecting portion 40 from the roller guide surface 16, and symbol L represents the caulking jig 44 on the opening end surface of the outer ring 10. Represents the length to be pushed in the axial direction. If the caulking depth D is too shallow, the projecting height H of the projecting portion 40 is reduced, and conversely if it is too deep, machining becomes difficult. Since the purpose of forming the protrusion 40 is to prevent the roller 36 from coming off, the caulking depth D is suitably 0.3 mm or more and 5 mm or less.

  The crimping jig 44 shown in FIG. 3C has a tapered surface pressed against the outer ring 10 and can process the two protrusions 40 simultaneously. The following findings were obtained when caulking was attempted with various changes in the angle α. When compared with the same indentation length L (see FIG. 3B), a large load is required when the angle α is small (less than 10 degrees). As the angle α increases, the protrusion height H increases and the load decreases. However, when the angle α exceeds 45 degrees, the protrusion height H is small. When the angle α exceeds 60 degrees, the protrusion 40 is formed and the deformation in the direction in which the distance between the roller guide surfaces facing each other increases is significant. For these reasons, the angle α needs to be 10 degrees or more and 60 degrees or less, and preferably 15 degrees or more and 45 degrees or less.

  In FIG. 3 (A), the caulking shows an example in which two tracks facing each other in one phase are processed at the same time. However, one track can be processed at a time, three phases can be processed simultaneously, or one track can be processed within one phase. To establish. Further, the processing site may be only the track or may extend over the peripheral site.

  Although only the outer ring 10 is shown in FIG. 4, the caulking process is performed in a state where the tripod kit (20, 30) is inserted into the outer ring 10 to form a cassette (10, 20, 30). Here, the tripod 20, the roller 30, the needle roller 32, and other accessories are referred to as a tripod kit. FIG. 3 (A) shows a state where the tripod kit (20, 30) is accommodated in the outer ring 10 to form a cassette. By forming a cassette in this way, the outer ring 10 and the tripod kit (20, 30) can be handled as one unit. Note that the retaining device provided at the opening end of the outer ring 10 may be a type in which a retaining ring is mounted (see FIG. 12).

  As shown in FIG. 14, a clip 54 is used to prevent the tripod 20 and the shaft 50 from coming off. Then, when the shaft 50 with the clip 54 mounted in the annular groove 52 at the shaft end portion is inserted into the spline hole 24 of the tripod 20 in the cassette state, the clip 54 reaches the concave portion on the terminal end side of the spline hole 24. As soon as it expands elastically, it fits into the recess of the tripod 20. As shown in the drawing, the dimensional relationship is set so that the tip of the shaft 50 does not hit the bottom of the mouth portion of the outer ring 10 until the clip 54 can be mounted in a predetermined position and posture.

  The clip 54 having an enlarged diameter interferes with the side wall of the annular groove 52 of the shaft 50 and the side wall of the recess of the tripod 20 to play a role of preventing the removal. The side wall of the recess of the tripod 20 has a slope inclined with respect to the central axis of the tripod 20, and when an axial load is applied to pull out the shaft 50 from the tripod 20, a component force in a direction to reduce the diameter of the clip 54 is generated. To do. Therefore, when an axial load exceeding a predetermined value is applied to the shaft 50, the clip 54 is reduced in diameter and enters the annular groove 52 of the shaft 50 to escape from the recess of the tripod 20, thereby allowing separation of the tripod 20 and the shaft 50. . As described above, the cassette can be exchanged by designing it so that the fitting between the tripod 20 and the shaft 50 is eliminated.

  A tripod kit (20, 30) separated from the shaft 50 is inserted into the outer ring 10, and a retaining device is provided at the opening end of the outer ring 10. Thereby, the outer ring 10 and the tripod kit (20, 30) are made into a cassette, and the whole can be handled as one unit. The assembly of the tripod type constant velocity universal joint becomes only the grease filling, the shaft insertion, and the boot (not shown) attachment by using the cassette, and the work is simplified. For comparison, the prior art is referred to as follows. That is, after the tripod kit is fitted to the shaft and fixed with a clip, the tripod kit is inserted into the outer ring, and then a retaining device is provided at the opening end of the outer ring.

  As described above, the case where the present invention is applied to a tripod type constant velocity universal joint has been described as an example, but the present invention is applicable to other types of tripod type constant velocity universal joints, and also to sliding type constant velocity universal joints other than the tripod type. The same can be applied.

  6 to 8 show examples of a double offset type constant velocity universal joint. The double offset type constant velocity universal joint includes an outer ring 110 as an outer joint member, an inner ring 120 as an inner joint member, a ball 130 as a torque transmission element, and a cage 132 that holds the ball 130 as main components. This is a sliding constant velocity universal joint.

  The outer ring 110 has a cylindrical inner peripheral surface 112, and ball grooves 114 extending in the axial direction are formed at equal intervals in the circumferential direction. Here, the outer ring 110 is a flange type, and is connected to one of two shafts (drive shaft or driven shaft) to be coupled by the joint via a flange 116 formed integrally so that torque can be transmitted. In the following description, the flange 116 side (right side in FIG. 6) of the outer ring 110 is referred to as the outer ring rear side, and the opposite side (left side in FIG. 6) is referred to as the outer ring inlet side. Since the flange type outer ring 110 is open at both ends, a cap 118 is attached to the opening on the back side of the outer ring in order to fill the inside with grease. There is also a type of outer ring having a stem portion that forms a serration shaft.

  The inner ring 120 has a spherical outer peripheral surface 122, and ball grooves 124 extending in the axial direction are formed at equal intervals in the circumferential direction. The inner ring 120 is connected to the other of the two shafts (driven shaft or drive shaft) to be coupled by the joint via a serration hole 126 formed in the shaft center portion so as to be able to transmit torque.

  The ball groove 114 of the outer ring 110 and the ball groove 124 of the inner ring 20 make a pair, and one ball 130 is incorporated between each pair of ball grooves 114 and 124. Although the number of balls is arbitrary, generally six or eight balls 130 are used, and all the balls 130 are held in the same plane by the cage 132.

  The cage 132 has pockets 134 for accommodating the balls 130 formed at predetermined intervals in the circumferential direction. The outer peripheral surface 136 of the cage 132 has a convex spherical portion that contacts the inner peripheral surface 112 of the outer ring 110, and the inner peripheral surface 138 of the cage 132 has a concave spherical portion that contacts the outer peripheral surface 122 of the inner ring 120. The spherical center of the convex spherical portion of the outer peripheral surface 136 and the spherical center of the concave spherical portion of the inner peripheral surface 138 are offset by an equal distance on both sides in the axial direction across the joint center O. The pocket 134 is disposed so that the axial position of the ball center is bisected at a distance from the spherical center of the convex spherical portion of the outer peripheral surface 136 of the cage 132 to the spherical center of the concave spherical portion of the inner peripheral surface 138. It is set as follows.

  In the double offset type constant velocity universal joint, the ball groove 114 of the outer ring 110 corresponds to the aforementioned track. As shown in FIGS. 4 and 6, by providing the protruding portion 140 in the ball groove 114, the movement of the ball 130 in the direction of the opening end surface of the outer ring 110 is restricted, and the inner ring 120 can be prevented from coming out of the outer ring 110. it can.

  9 to 11 show examples of a cross groove type constant velocity universal joint. The cross groove type constant velocity universal joint includes an outer ring 210 as an outer joint member, an inner ring 220 as an inner joint member, a ball 230 as a torque transmission element, and a cage 232 for holding the ball 230 as main components. .

  The outer ring 210 is a disk type here, and ball grooves 214a and 214b are formed on a cylindrical inner peripheral surface 112. Bolt holes 216 are equally arranged in the circumferential direction so as to be positioned between the ball grooves 214 a and 14 b of the outer ring 210. An end cap 234 is attached to one end of the outer ring 210, and a boot adapter 236 is attached to the other end. In addition to the disk type illustrated here, the outer ring includes a flange type and a bell type.

  The inner ring 220 has ball grooves 224 a and 224 b formed on a substantially spherical outer peripheral surface 222. The inner ring 220 has a spline hole and is fitted to the spline shaft of the shaft so that torque can be transmitted, as indicated by a broken line.

  Ball grooves 214a inclined with respect to the axis of the outer ring 210 and ball grooves 214b inclined in the direction opposite to the ball groove 214a with respect to the axis of the outer ring 210 are alternately arranged in the circumferential direction. Similarly, ball grooves 224a inclined with respect to the axis of the inner ring 220 and ball grooves 224b inclined with respect to the axis in a direction opposite to the ball grooves 224a are alternately arranged in the circumferential direction.

  Referring to FIG. 11, the crossing angle of each ball groove 214a, 214b; 224a, 224b with respect to the axis is represented by the symbol β. The ball groove 214a of the outer ring 210 and the ball groove 224a of the inner ring 220 that are inclined in opposite directions form a pair, and the angle between the two is represented by 2β. Similarly, the ball groove 214b of the outer ring 210 and the ball groove 224b of the inner ring 220 which are inclined in opposite directions form a pair, and the angle formed by both is represented by 2β.

  Balls 230 are incorporated in the intersection between the ball groove 214a of the outer ring 210 and the ball groove 224a of the inner ring 220 and the intersection of the ball groove 214b of the outer ring 210 and the ball groove 224b of the inner ring 220, respectively. FIG. 10 illustrates a case where the number of balls 230 is six.

  In the cross groove type constant velocity universal joint, the ball grooves 214a and 214b of the outer ring 210 correspond to the aforementioned track. As shown in FIGS. 9 and 10, by providing the protrusions 240 in the ball grooves 214a and 214b, the movement of the ball 230 in the direction of the opening end surface of the outer ring 210 is restricted, and the inner ring 220 is prevented from coming out of the outer ring 210. be able to.

It is a longitudinal cross-sectional view of the cassette of the tripod type constant velocity universal joint which shows an Example. (A) is an end view of the joint of FIG. 1, and (B) is a bb cross-sectional view of FIG. 2 (A). (A) is an end view of the outer ring, (B) is a bb cross-sectional view of FIG. 3 (A), and (C) is a plan view of a caulking jig. (A) is a longitudinal sectional view of the outer ring before caulking, (B) is a plan view of FIG. 4 (A), and (C) is a side view of FIG. 4 (B). (A) is a longitudinal cross-sectional view of a tripod type constant velocity universal joint, (B) is a cross-sectional view. It is a longitudinal cross-sectional view of a double offset type constant velocity universal joint. It is a longitudinal cross-sectional view of the inner sub-assembly in FIG. FIG. 7 is an end view of the outer ring in FIG. 6. It is a longitudinal cross-sectional view of a cross groove type constant velocity universal joint. FIG. 10 is an end view of the joint of FIG. 9. FIG. 10 is a development view of a ball groove of the joint of FIG. 9. (A) and (B) are end views of a tripod type constant velocity universal joint provided with a clip type retaining device. It is a partial longitudinal cross-sectional view of the outer ring | wheel of a tripod type constant velocity universal joint. It is a longitudinal cross-sectional view which shows the assembly process of a cassette (an outer ring, a tripod, a roller) and a shaft.

Explanation of symbols

10 Outer ring (outer joint member)
12 Mouse part 14 Track groove 16 Roller guide surface 18 Stem part 20 Tripod (inner joint member)
22 Boss 24 Spline hole 26 Trunnion journal 27 Brim 28 Annular groove 29 Track groove 30 Roller (torque transmission element)
32 Needle roller 34 Inner washer 36 Outer washer 38 Circlip 40 Projection 44 Caulking jig 50 Shaft 52 Annular groove 54 Clip

Claims (11)

An outer joint member connected to the drive shaft or the driven shaft, an inner joint member connected to the driven shaft or the drive shaft, and a torque transmission element for transmitting torque between the outer joint member and the inner joint member In the sliding constant velocity universal joint, the torque transmission element is movable along a track formed inside the outer joint member,
By providing a retaining device at the open end of the outer joint member, the inner joint member and the torque transmission element accommodated in the outer joint member and the outer joint member are used as a sliding type, etc. Fast universal joint.   The sliding type constant velocity universal joint according to claim 1, wherein the retaining means is formed by attaching a clip to an opening end of the outer joint member.   The sliding type constant velocity universal joint according to claim 1, wherein the retaining device is formed by providing a projecting portion on the track on the inner side of the opening end surface of the outer joint member.   The protrusion height of the protrusion from the track is 0.4 mm or more, and the surface on the opening end face side of the protrusion forms an angle of 10 degrees or more and 60 degrees or less with respect to the opening end face. Sliding type constant velocity universal joint.   The sliding constant velocity universal joint according to claim 3 or 4, wherein the protruding width of the protruding portion is 4 mm or more.   6. The sliding type constant velocity universal joint according to claim 3, 4 or 5, having a pull-out strength of 490 N or more.   The sliding type constant velocity universal joint according to any one of claims 3 to 6, wherein the track on the back side of the protruding portion is quenched by induction heat treatment.   The sliding constant velocity universal joint according to any one of claims 3 to 6, wherein the track is quenched by carburizing heat treatment.   The sliding type constant velocity universal joint according to any one of claims 1 to 8, which is a tripod type constant velocity universal joint.   The sliding type constant velocity universal joint according to any one of claims 1 to 8, which is a double offset type constant velocity universal joint.   The sliding type constant velocity universal joint according to any one of claims 1 to 8, which is a cross groove type constant velocity universal joint.