JP2011058582A - Roller cassette for tripod type constant-velocity universal joint, sub assembly for tripod type constant-velocity universal joint, tripod kid for tripod type constant-velocity universal joint, and tripod type constant-velocity universal joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a roller cassette for a tripod type constant-velocity universal joint, a sub assembly for a tripod type constant-velocity universal joint, a tripod kid for a tripod type constant-velocity universal joint, and a tripod type constant-velocity universal joint. <P>SOLUTION: While assembled to an outer joint member 1, in needle rollers 12, a first skew angle θ1 is made by a circumferential clearance, and a second skew angle θ2 is made by a radial clearance. While keeping a joint function, difference in range of the second skew angle θ2 is larger than difference in range of the first skew angle θ1. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a roller cassette for a tripod type constant velocity universal joint, a subassembly for a tripod type constant velocity universal joint, a tripod kit for a tripod type constant velocity universal joint, and a tripod type constant velocity universal joint.

  For example, in a drive shaft that transmits torque from an automobile engine to a wheel, one end of the drive shaft is connected to a differential via a sliding type constant velocity universal joint, and the other end is connected to a wheel via a fixed type constant velocity universal joint. The As a sliding type constant velocity universal joint used for a drive shaft, for example, a tripod type constant velocity universal joint is known.

  As shown in FIGS. 8 and 9, the tripod type constant velocity universal joint includes an outer joint member 51, a tripod member 52 as an inner joint member, and a roller 53 as a torque transmission member as main components.

  The outer joint member 51 includes a mouth portion 54 and a stem portion 55 that are integrally formed. The mouse part 54 has a cup shape opened at one end, and a track groove 56 extending in the axial direction is formed at a position of the inner circumference at a halved position. The mouse portion 54 has a non-cylindrical shape in which large-diameter portions 54a and small-diameter portions 54b appear alternately, and a track groove 56 is formed on the radially inner side of the large-diameter portion 54a. Roller guide surfaces 57 and 57 are formed on the side walls of each track groove 56 facing in the circumferential direction.

  The tripod member 52 has a boss 58 and a leg shaft 59. The boss 58 is formed with a spline or serration hole 61 which is coupled to a shaft (not shown) so as to be able to transmit torque. The leg shaft 59 protrudes in the radial direction from the circumferentially divided position of the boss 58. Each leg shaft 59 of the tripod member 52 supports the roller 53 rotatably.

  A plurality of needle rollers 62 are disposed between the leg shaft 59 and the roller 53. The positions of these needle rollers 62 are restricted by an inner washer 63 attached to the outer peripheral surface of the base end side of the leg shaft 59 in the base end direction of the leg shaft 59. In the direction of the distal end of the leg shaft 59, the position is regulated and prevented from coming off by an outer washer 64 provided on the distal end side of the leg shaft 59. A circumferential groove 65 is formed on the outer peripheral surface on the distal end side of the leg shaft 59, and a retaining ring 66 is attached to the circumferential groove 65. The outer washer 64 is fitted to the outer peripheral surface of the leg shaft 59 on the inner side (leg shaft base end side) of the retaining ring 66.

  In the conventional tripod type constant velocity universal joint as shown in FIG. 8 and FIG. 9, the clearance (circumferential clearance and radial clearance) between the trunnion journal (leg shaft) 59, needle roller 62, and roller 53 is as follows. It was not set considering the skew angle.

  The NVH characteristics of the tripod constant velocity universal joint change depending on the angle at which the needle roller can actually skew. However, since the skew angle is determined from the radial clearance and the circumferential clearance, this has not been taken into consideration conventionally. For this reason, the NVH characteristics differ depending on the proportion and size of the tripod type constant velocity universal joint, and optimization has not been achieved.

  Therefore, conventionally, there has been proposed one in which the skew of the needle roller is suppressed to reduce the vibration of the tripod type constant velocity universal joint (Patent Document 1).

  In this tripod type constant velocity universal joint described in Patent Document 1, a skew angle (θ1) of a needle roller that may be generated by a circumferential clearance is set in an annular space between the roller and the trunnion journal (leg shaft). The needle roller has a larger skew angle (θ2) that can be generated by the radial clearance in the needle roller, and the needle roller in the annular space between the roller and the trunnion journal out of the skew angle of the needle roller. The skew angle (θ2) of the needle rollers generated by the radial clearance is in the range of 4.0 ° to 4.5 °.

The angle at which needle rollers can actually skew, that is, the degree of freedom of the skew angle, is limited by the radial clearance (radial clearance) and the clearance between rollers in the pitch circle (circumferential clearance). The smaller of them becomes dominant. In the case of the skew caused by the clearance in the circumferential direction, the skew can occur until the rollers come into contact with each other. Therefore, the skew angle θ1 at this time is expressed by Equation 1.

  Here, D is the inner diameter of the roller, d is the roller diameter, and Z is the number of rollers.

Further, in the case of skew due to the radial clearance, the skew can be skewed until both end portions of the roller are in contact with the inner diameter of the roller. Therefore, the skew angle θ2 at this time is expressed by Equation 2.

  Here, gr is the radial clearance, and l is the effective length of the roller.

  These skew angles θ1 and θ2 are obtained, and the smaller one is the skew angle that can actually occur.

  And in the said patent document 1, by setting radial clearance so that the relationship of both skew angle (theta) 1 and (theta) 2 is (theta) 1> (theta) 2 and skew angle (theta) 2 may be 4.0 degrees-4.5 degrees, it is tripod. It is said that the induced thrust of the type constant velocity universal joint has been reduced and low vibration has been achieved.

  By the way, the tripod type constant velocity universal joint shown in FIG. 8 and FIG. 9 is a single roller type with one roller for each leg shaft. On the other hand, there is also a double roller type tripod type constant velocity universal joint with two rollers for each leg shaft as described in Patent Document 2.

Japanese Patent No. 3987476 Japanese Patent No. 3599618

  The tripod type constant velocity universal joint described in Patent Document 1 can surely achieve low vibration, and is a preferable configuration for this low vibration. However, strict clearance management is required by setting the skew angle (θ2) in the range of 4.0 ° to 4.5 °.

  Therefore, the diameters of the rollers, trunnion journals, and needle rollers are all processed with extremely high accuracy and assembled. Alternatively, it is necessary to measure the diameters of rollers, trunnion journals (leg shafts), and needle rollers in advance and combine them (matching) so that a predetermined clearance is obtained.

  However, if each member is processed with high accuracy, the processing time will be increased, defective products will be generated, and the cost will increase. In addition, even if each member is processed with high accuracy, it is not clear whether a clearance in which the skew angle (θ2) is in the range of 4.0 ° to 4.5 ° can be secured in the assembled state. In addition, for matching, it is necessary to prepare multiple types with different dimensions for each part, so new man-hours for component measurement, management, and part selection during assembly are required. Since the number of parts is not known in advance, it is necessary to make a large number of parts, and an extra storage location is required, resulting in high costs.

  Further, even in the double roller type tripod type constant velocity universal joint described in Patent Document 2, the skew angle is not considered.

  Therefore, in view of such circumstances, the present invention is intended to provide a double roller type tripod type constant velocity universal joint capable of taking a large skew angle and facilitating clearance management without adversely affecting the joint function. To do.

  A roller cassette for a tripod type constant velocity universal joint according to the present invention includes an inner roller that is externally fitted to a leg shaft that protrudes in the radial direction of the tripod member, and an outer roller that rolls on the roller guide surface of the track groove of the outer joint member. The needle roller includes a plurality of needle rollers interposed between the outer roller and the inner roller. When assembled to the outer joint member, the needle roller may have a first skew angle due to a circumferential clearance. And a tripod type constant velocity universal joint roller cassette capable of generating a second skew angle due to a radial clearance, wherein a difference in the range of the second skew angle is determined while maintaining the joint function. It is larger than the range difference.

  According to the tripod type constant velocity universal joint roller cassette of the present invention, the range of the second skew angle can be increased without adversely affecting the joint function. In particular, by setting the first skew angle θ1 to 6 ° to 9 °, the range of the second skew angle θ2 can be made as large as 3 ° to 12 °. Here, maintaining the joint function means that the function as a constant velocity universal joint is not adversely affected. Specifically, the induced thrust shows a good value and the durability does not deteriorate. That is. Here, the induced thrust refers to a thrust force generated by friction within the joint when torque is applied at a certain angle during rotation of the constant velocity universal joint.

  The first skew angle can be made smaller than the second skew angle and can be filled with grease.

  The tripod type constant velocity universal joint tripod kit of the present invention comprises a tripod member having three leg shafts protruding in the radial direction, and a roller cassette mounted on each leg shaft of the tripod member. A tripod kit in which a member and a roller cassette are integrated, wherein the roller cassette is a roller cassette for the tripod type constant velocity universal joint.

  A sub-assembly for a tripod type constant velocity universal joint according to the present invention includes an outer joint member having three track grooves in the axial direction formed on the inner peripheral portion, and roller guide surfaces extending in the axial direction on both sides of each track groove. A tripod type constant velocity universal joint subassembly comprising a tripod member having three leg shafts projecting in the radial direction and a roller cassette mounted on each leg shaft of the tripod member, wherein the roller The above-described tripod type constant velocity universal joint roller cassette is used as the cassette.

  It is preferable that the surface pressure between the needle roller and the inner roller be higher than the surface pressure between the outer roller and the roller guide surface of the outer joint member. Also, the outer roller and the roller guide surface of the outer joint member can be an angular contact or a circular contact.

  Tripod which has three track grooves in the axial direction on the inner periphery, an outer joint member having a roller guide surface extending in the axial direction on each side of each track groove, and three leg shafts projecting in the radial direction A tripod type constant velocity universal joint subassembly comprising a member and a roller cassette mounted on each leg shaft of the tripod member, wherein the tripod kit is used for the tripod member and the roller cassette. .

  The tripod type constant velocity universal joint according to the present invention uses the tripod type constant velocity universal joint sub-assembly.

  In the tripod type constant velocity universal joint roller cassette of the present invention, the second skew angle range can be increased without adversely affecting the joint function. For this reason, clearance management can be facilitated. Therefore, it is not necessary to carry out high-precision finishing of each component constituting the roller cassette, and it is not necessary to carry out high-precision matching, so that the assembling property can be improved and the cost can be reduced.

  In particular, by setting the first skew angle θ1 to 6 ° to 9 °, the second skew angle θ2 can be set in a wide range without adversely affecting the joint function, and the clearance management can be facilitated stably. be able to.

  The skew angle that can actually occur is the smaller of the skew angle (θ1) that can be generated by the circumferential clearance and the skew angle (θ2) that can be generated by the radial clearance. Therefore, by reducing the skew angle (θ1) that can be generated by the circumferential clearance, only the skew angle (θ1) can be regulated to take measures against the skew of the needle rollers.

  In the double roller type tripod type constant velocity universal joint, there is a roller that can take an angle between the trunnion journal (leg shaft) and the trunnion journal (leg shaft). The influence of the roller skew on the function is smaller than that of the single roller type. For this reason, it is possible to increase the skew angle without adversely affecting the function.

  In the double roller type tripod type constant velocity universal joint, the roller is in contact with the inside of the needle roller and is rotatable. For this reason, the point where the load is applied constantly fluctuates, and the entire surface of the roller is repeatedly subjected to the load. In the single roller type, the trunnion journal (leg shaft) is in contact with the inside of the needle roller, and since it does not rotate, it always receives a load at the same point. For this reason, the double roller type has high durability of the inner parts (inner rollers) of the needle rollers, and the surface pressure can be set high.

  The contact length between the needle roller and the inner roller can be reduced by making the surface pressure between the needle roller and the inner roller higher than the surface pressure between the outer roller and the roller guide surface of the outer joint member. As a result, the inner roller can be made smaller, and the entire joint can be made compact.

  A tripod kit can be constituted by using the roller cassette according to the present invention, a subassembly can be constituted by using such a tripod kit, and a tripod type constant velocity universal joint can be constructed by using such a subassembly. Can be configured. For this reason, as a tripod type constant velocity universal joint, the improvement of assembly property and cost reduction can be achieved.

It is sectional drawing of the tripod type | mold constant velocity universal joint which shows embodiment of this invention. It is an enlarged vertical sectional view of the roller cassette of the tripod type constant velocity universal joint. It is an expansion cross-sectional view of the roller cassette of the tripod type constant velocity universal joint. It is a simplified diagram showing an annular space formed between an inner roller and an outer roller. It is explanatory drawing of the skew resulting from the circumferential direction clearance of a needle roller. It is explanatory drawing of the skew resulting from the radial direction clearance of a needle roller. The relationship between an outer side roller and a roller guide surface is shown, (a) is a simplified diagram in the case of making an angular contact, and (b) is a simplified diagram in the case of making a circular contact. It is a longitudinal cross-sectional view of the conventional tripod type constant velocity universal joint. It is a cross-sectional view of a conventional tripod type constant velocity universal joint.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the tripod type constant velocity universal joint includes an outer joint member 1, a tripod member 2 as an inner joint member, and a roller cassette 3 as a torque transmission member as main components. In this case, the combination of tripod member 2 and roller cassette 3 is referred to as tripod kit 20, and the combination of outer joint member 1, tripod member 2 and roller cassette 3 is referred to as subassembly 21.

  The outer joint member 1 includes a mouth portion 4 and a stem portion (not shown) that are integrally formed. The mouse portion 4 has a cup shape opened at one end, and a track groove 6 extending in the axial direction is formed at a position of the inner circumference that is equally divided into three. The mouse portion 4 has a non-cylindrical shape in which large-diameter portions 4a and small-diameter portions 4b appear alternately, and a track groove 6 is formed on the radially inner side of the large-diameter portion 4a. Roller guide surfaces 7 are formed on the side walls of each track groove 6 facing each other in the circumferential direction.

  The tripod member 2 has a boss 8 and a leg shaft 9 as shown in FIG. The boss 8 is formed with a spline or serration hole 11 coupled to a shaft (not shown) so as to be able to transmit torque. The leg shaft 9 protrudes in the radial direction from the circumferentially divided position of the boss 8. Each leg shaft 9 of the tripod member 2 supports the roller cassette 3 to be rotatable. A hardened layer S is provided on the outer peripheral surface of the leg shaft 9. This hardened layer S is formed by, for example, induction hardening.

  The roller cassette 3 includes an inner roller 13 that is fitted onto the leg shaft 9, an outer roller 14 that rolls on the roller guide surface 7, and a plurality of needle rollers that are interposed between the inner roller 13 and the outer roller 14. 12. In this case, the roller cassette 3 (the roller cassette in a state before being attached to the leg shaft 9) is filled with grease. As the grease, urea-based or lithium-based grease, etc., which is generally filled in this type of roller cassette is used.

  That is, as shown in FIG. 2, the cylindrical outer peripheral surface 13a of the inner roller 13 is used as the inner raceway surface, and the cylindrical inner peripheral surface 14a of the outer roller 14 is used as the outer raceway surface. 12 is movably interposed. As shown in FIG. 3, the needle roller 12 is incorporated in a so-called full-roller state in which as many rollers as possible are inserted and there is no cage. In addition, annular grooves 17 and 18 (see FIG. 2) are formed at both axial ends of the inner peripheral surface of the outer roller 14, and washers 15 and 16 for retaining the needle rollers 12 are attached to the respective annular grooves. ing.

  The outer peripheral surface 14b of the outer roller 14 may be a partial spherical surface having a center of curvature on the axis, or may be a convex curved surface having an arc having a center of curvature at a position away from the axis in the radial direction as a generating line. Further, the contact form of the roller guide surface 7 and the outer roller 14 may be an angular contact as shown in FIG. 7A or a circular contact as shown in FIG. 7B. Since the angular contact has a certain contact angle and contacts at two points, a contact ellipse is generated at two points in the contact angle direction. Since the circular contact is a contact between spherical surfaces, it contacts at one point.

  In the present embodiment, the surface pressure between the needle roller 12 and the inner roller 13 is preferably higher than the surface pressure between the outer roller 14 and the roller guide surface 7 of the outer joint member 1. For example, the surface pressure between the outer roller 14 and the roller guide surface 7 of the outer joint member 1 is 2.70 GPa, and the surface pressure between the needle roller 12 and the inner roller 13 is 3.79 GPa.

  The outer peripheral surface of the leg shaft 9 has a straight shape parallel to the axis of the leg shaft 9 when viewed in a longitudinal section (see FIG. 1), and the long axis is perpendicular to the axis of the joint when viewed in a cross section (FIG. 3). It is elliptical. The cross-sectional shape of the leg shaft 9 is substantially elliptical by reducing the thickness seen in the axial direction of the tripod member 2. In other words, the cross-sectional shape of the leg shaft 9 is such that the surfaces of the tripod member 2 facing each other in the axial direction are retracted in the mutual direction, that is, on the smaller diameter side than the virtual cylindrical surface.

  The inner peripheral surface of the inner roller (support ring) 13 has an arcuate convex cross section as shown in FIG. Since the cross-sectional shape of the leg shaft 9 is substantially elliptical as described above and a predetermined clearance is provided between the leg shaft 9 and the support ring 13, the inner roller 13 is provided with the leg shaft 9. In addition to being able to move in the axial direction of 9, it can swing and swing with respect to the leg shaft 9.

  Further, as described above, since the inner roller 13 and the outer roller 14 are unitized so as to be relatively rotatable via the needle rollers 12, the inner roller 13 and the outer roller 14 swing as a unit with respect to the leg shaft 9. It is in a swingable relationship. Here, swinging means that the axes of the inner roller 13 and the outer roller 14 are inclined with respect to the axis of the leg shaft 9 in a plane including the axis of the leg shaft 9.

  By the way, in such a tripod type constant velocity universal joint, a circumferential clearance and a radial clearance are generated with respect to the needle roller 12. The needle roller 12 is disposed around the leg shaft 9 as shown in FIG. 3 with its axis O1 parallel to the axis O of the leg shaft 9. For this reason, the circumferential clearance includes the clearance between the needle rollers 12 generated along the circumferential direction A in the direction in which the needle rollers 12 are arranged, and the needle rollers 12 are legged by the circumferential clearance. As shown in FIG. 4 and FIG. The tilt angle is referred to as a first skew angle θ1 of the needle roller 12 that can be generated by the circumferential clearance. Further, an annular space 25 is formed between the inner roller 13 and the outer roller 14, and the needle rollers 12 are disposed in the annular space 25. For this reason, there exists a possibility that the needle roller 12 may fall in the arrow B direction (radial direction) of FIG. The tilt angle is referred to as a second skew angle θ2 (see FIG. 6) of the needle roller 12 that can be generated by the radial clearance.

  In this tripod type constant velocity universal joint, the magnitude difference in the range of the second skew angle θ2 is made larger than the magnitude difference in the range of the first skew angle θ1 while maintaining the joint function. In this embodiment, the range of the first skew angle θ1 is 6 ° to 9 °, and the range of the second skew angle θ2 is 3 ° to 12 °. Here, maintaining the joint function means that the function as a constant velocity universal joint is not adversely affected. Specifically, the induced thrust shows a good value and the durability does not deteriorate. That is. Here, the induced thrust refers to a thrust force generated by friction within the joint when torque is applied at a certain angle during rotation of the constant velocity universal joint.

  By the way, in this tripod type constant velocity universal joint, the roller cassette 3 is first assembled as shown in FIG. Next, the assembled roller cassette 3 is attached to each leg shaft 9 of the tripod member 2, thereby assembling the tripod kit 20 in which the tripod member 2 and the roller cassette 3 are assembled. Then, the subassembly 21 is assembled by inserting the tripod kit 20 into the mouth portion 4 of the outer joint member 1. In this manner, the tripod type constant velocity universal joint can be obtained by fitting the shaft into the boss 8 of the tripod member 2 and attaching the boot for closing the opening of the mouse portion 4 of the outer joint member 1 to the subassembly 21. Complete.

  In the tripod type constant velocity universal joint roller cassette of the present invention, the range of the second skew angle θ2 can be increased without adversely affecting the joint function. For this reason, clearance management can be facilitated, and it is not necessary to carry out high-precision finishing of each component constituting the roller cassette 3, and it is not necessary to carry out high-precision matching. Cost reduction can be achieved.

  In particular, by setting the first skew angle θ1 to 6 ° to 9 °, the second skew angle θ2 can be set in a wide range without adversely affecting the joint function, and the clearance management can be facilitated stably. be able to.

  The skew angle that can actually occur is the smaller of the skew angle (θ1) that can be generated by the circumferential clearance and the skew angle (θ2) that can be generated by the radial clearance. Therefore, by reducing the skew angle (θ1) that can be generated by the circumferential clearance, only the skew angle (θ1) can be regulated to take measures against the skew of the needle rollers.

  In the double roller type tripod type constant velocity universal joint, there is a roller that can take an angle between the trunnion journal (leg shaft) 9 and the needle roller 12 between the trunnion journal (leg shaft) 9. Therefore, the influence of the skew of the needle roller 12 on the function is smaller than that of the single roller type. For this reason, it is possible to increase the skew angle without adversely affecting the function.

  In the double roller type tripod type constant velocity universal joint, it is a roller that contacts the inside of the needle roller 12 and is rotatable. For this reason, the point where the load is applied constantly fluctuates, and the entire surface of the roller is repeatedly subjected to the load. In the single roller type, the trunnion journal (leg shaft) 9 is in contact with the inside of the needle roller 12, and since it does not rotate, it always receives a load at the same point. Therefore, in the double roller type, the durability of the inner part (inner roller) of the needle roller 12 is high, and the surface pressure can be set high.

  The contact length between the needle roller 12 and the inner roller 13 is increased by making the surface pressure between the needle roller 12 and the inner roller 13 higher than the surface pressure between the outer roller 14 and the roller guide surface 7 of the outer joint member 1. Can be reduced. As a result, the inner roller 13 can be made smaller, and the entire joint can be made compact.

  As described above, the embodiment of the present invention has been described. However, the present invention is not limited to the above embodiment, and various modifications are possible. For example, as a tripod type constant velocity universal joint, the outer periphery of the leg shaft of the tripod member The surface may be a true spherical surface, and the cylindrical inner peripheral surface of the inner roller may be slidably fitted onto the true spherical surface. This can reduce slide resistance and induced thrust. Further, a type in which a ring member is interposed between the inner roller and the needle roller may be used. Here, the slide resistance is a sliding joint such as a tripod type constant velocity universal joint, and means a magnitude of the axial friction force generated when the outer ring and the tripod member slide relative to each other. The induced thrust is as described above.

Example 1
A constant velocity universal joint as a plurality of samples with θ1 of 6 ° to 9 ° and θ2 of 3 ° to 15 ° was manufactured, and induced thrust was measured for each sample. In this case, the torque was 294 N · m, the rotation speed was 1500 rpm, and the operating angle was 7 °. When [theta] 2 was 3 [deg.] to 15 [deg.], there was not much change and a good value was shown. Further, even when θ1> θ2 and θ1 <θ2, the results were almost the same.

Example 2
A constant velocity universal joint as a plurality of samples having θ1 of 6 ° to 9 ° and θ2 of 3 ° to 15 ° was manufactured, and a durability test was performed on each sample. In this case, the torque was 726 N · m, the rotation speed was 230 rpm, and the operating angle was 6 °. The target durability was exhibited when θ2 was 3 ° to 12 °, but the target durability was not exhibited when θ2 was 15 °.

  As can be seen from Examples 1 and 2, it is understood that θ1 should be 6 ° to 9 ° and θ2 should be 3 ° to 12 °.

DESCRIPTION OF SYMBOLS 1 Outer joint member 2 Tripod member 3 Roller cassette 6 Track groove 7 Roller guide surface 9 Leg shaft 13 Inner roller 12 Needle roller 14 Outer roller 20 Tripod kit 21 Subassembly

Claims (11)

An inner roller that is externally fitted to a leg shaft that protrudes in the radial direction of the tripod member, an outer roller that rolls on the roller guide surface of the track groove of the outer joint member, and the outer roller and the inner roller. A tripod comprising a plurality of needle rollers, and in the assembled state to the outer joint member, the needle rollers can generate a first skew angle due to a circumferential clearance and a second skew angle due to a radial clearance. Type constant velocity universal joint roller cassette,
A tripod type constant velocity universal joint roller cassette, wherein the difference in the range of the second skew angle is made larger than the difference in the range of the first skew angle while maintaining the joint function.   2. The roller cassette for a tripod type constant velocity universal joint according to claim 1, wherein the range of the first skew angle is 6 ° to 9 ° and the range of the second skew angle is 3 ° to 12 °. .   The roller cassette for a tripod type constant velocity universal joint according to claim 1 or 2, wherein the first skew angle is smaller than the second skew angle.   The roller cassette for a tripod type constant velocity universal joint according to any one of claims 1 to 3, which is filled with grease. A tripod kit including a tripod member having three leg shafts projecting in the radial direction and a roller cassette mounted on each leg shaft of the tripod member, and the tripod member and the roller cassette are integrated. There,
5. A tripod kit using the tripod type constant velocity universal joint roller cassette according to any one of claims 1 to 4 as the roller cassette. Tripod having three axially formed track grooves on the inner periphery, outer joint members having roller guide surfaces extending axially on both sides of each track groove, and three leg shafts projecting in the radial direction A tripod type constant velocity universal joint sub-assembly comprising a member and a roller cassette mounted on each leg shaft of the tripod member,
A tripod type constant velocity universal joint subassembly according to any one of claims 1 to 4, wherein the roller cassette is the tripod type constant velocity universal joint roller cassette.   7. A subassembly for a tripod type constant velocity universal joint according to claim 6, wherein the surface pressure between the needle roller and the inner roller is higher than the surface pressure between the outer roller and the roller guide surface of the outer joint member. .   The subassembly for a tripod type constant velocity universal joint according to claim 6 or 7, wherein the outer roller and the roller guide surface of the outer joint member are angular contacts.   The tripod type constant velocity universal subassembly according to claim 6 or 7, wherein the outer roller and the roller guide surface of the outer joint member are circular contacts. Tripod which has three track grooves in the axial direction on the inner periphery, an outer joint member having a roller guide surface extending in the axial direction on each side of each track groove, and three leg shafts projecting in the radial direction A tripod type constant velocity universal joint sub-assembly comprising a member and a roller cassette mounted on each leg shaft of the tripod member,
A tripod type constant velocity universal joint sub-assembly using the tripod kit according to claim 5 for the tripod member and the roller cassette.   A tripod type constant velocity universal joint, wherein the tripod type constant velocity universal joint subassembly according to any one of claims 7 to 11 is used.

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