JP2005226812A - Constant velocity universal joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a yield of a constant velocity universal joint by improving a joint structure of a coupling member to an outside member or an inside member. <P>SOLUTION: By plastically joining a coupling member 50 to an outside member 10 or an inside member 20, shaft rigidity between both members is secured to reduce a press-fit load of the coupling member 50 to the outside member 10 or the like. As a result, no impression is made in track grooves 12, 24 of the outside member 10 or the inside member 20. As shown in the selected drawing, for example, if the outside member 10 is formed in a cap shape for fitting the inside member thereto through the medium of a holder 40 and provided with a through hole 15 in a side opposed to the side fitting with the inside member 20, a fitting part 53a of the coupling member 50 fitted in the through hole 15 of the outside member 10 is plastically transformed to the outside diameter side so as to be locked to a locking part 15c of the outside member 10. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a torque transmission ball type constant velocity freely in which a ball disposed on each of a plurality of ball tracks formed by cooperation of a track groove of an outer member and a track groove of an inner member is held by a cage. More particularly, the present invention relates to a structure in which a torque transmission connecting member extending from an outer member or an inner member is integrally attached to the outer member or the inner member.

  Constant velocity universal joints are broadly classified into fixed types that allow only angular displacement between the input and output shafts, and sliding types that allow angular displacement and axial displacement. Each model is selected according to the application and usage conditions. The

  FIG. 8 illustrates a Rzeppa type joint 1 ′ (hereinafter referred to as a joint 1 ′) which is a kind of fixed type constant velocity universal joint. Hereinafter, a conventional constant velocity universal joint will be described by taking the joint 1 'as an example. In the joint 1 ′, a cup portion 13 having a spherical inner surface 12 is provided at one end of the shaft portion 11, and the outer member 10 having a plurality of track grooves 14 formed in the spherical inner surface 12 of the cup portion 13, and at one end of the shaft portion 21. An inner ring 23 having a spherical outer surface 22 is provided, and an inner member 20 composed of an inner ring 23 having a plurality of track grooves 24 formed on the spherical outer surface 22 and a shaft portion 21, and a plurality of members disposed between both track grooves 14, 24. The ball 30 has a spherical outer surface 42 corresponding to the spherical inner surface 12 of the outer member 10 and a spherical inner surface 44 corresponding to the spherical outer surface 22 of the inner member 20, and a plurality of ball pockets 46 holding the ball 30 are arranged in the circumferential direction. A cage 40 formed at a predetermined interval is used as a main component (see, for example, Patent Document 1).

  FIG. 9 illustrates a case where the joint 1 ′ is applied to a vehicle steering device 71. The steering device 71 is provided with a joint 1 ′ between the input shaft 73 connected to the steering wheel 72 and the steering gear 74, and the steering wheel 72 operates with the input shaft 73 and the steering gear 74 at an operating angle. The applied rotational torque is transmitted to the steering gear 74.

  In FIG. 9, reference numerals 50a to 50c denote yokes as connecting members. The yoke 50a transmits torque between the shaft portion 11 of the outer member 10 extending from the joint 1 ′ on the steering wheel 72 side and the shaft portion 21 of the inner member 20 extending from the joint 1 ′ on the steering gear 74 side. It is for connecting as possible. The yoke 50b is for connecting the input shaft 73 and the shaft portion 21 of the inner member 20 extending from the joint 1 'on the steering wheel 72 side so that torque can be transmitted. The yoke 50c is for connecting the shaft portion 11 of the outer member 10 extending from the joint 1 'on the steering gear 74 side and the steering gear 74 so that torque can be transmitted. The connecting members for connecting the joint 1 ′ and the shaft outside the joint so as to be able to transmit torque, including these yokes 50a to 50c, are separate from the outer member 10 and the like from the viewpoint of processing requirements and ease of specification change. It is molded and coupled to the outer member 10 and the like so as to be able to transmit torque.

FIG. 10 shows a coupling structure of the shaft portion 11 of the outer member 10 of the joint 1 ′ on the steering gear 74 side and the yoke 50c. The conventional joint 1 ′ meshes with the outer diameter side of the shaft portion 11 of the outer member 10 and the inner diameter side of the yoke 50 c in order to transmit torque between the shaft portion 11 of the outer member 10 and the yoke 50 c. Torque transmission means S ₁ and S ₂ such as splines composed of axial ridges are formed to fit the shaft portion 11 and the yoke 50c so that torque can be transmitted, and press fitting, welding, bonding, bolting, etc. The shaft portion 11 and the yoke 50c are fixed by simple means. Note that the yokes 50a and 50b are coupled to the first and shaft portions 11 and 21 of the joint 1 'on the steering wheel 72 side and the shaft portion 21 of the joint 1' on the steering gear 74 side as shown in FIG. Since it is almost the same as the case, illustration and description are omitted.

  By the way, in the above-described steering device 71, there is a problem of preventing the rotation play in order to accurately transmit the rotation of the steer wheel 72 to the steering gear 74. Thus, in the use which dislikes rotation backlash, it is calculated | required to prevent the rotation backlash between the outer member 10 grade | etc., Of joint 1 ', and yoke 50a-50c.

In the case of press-fitting the yoke 50a~50c relative to the outer member 10 or the like, when the rotational backlash between the two members to attempt to suppress only the torque transmission means S _1, S _2, of the torque transmission means S _1, S ₂ It is necessary to narrow the radial gap between each other as much as possible. However, if the radial gap is narrowed, an excessive press-fitting load is required for the fitting of both members, so that the assembly workability is reduced, and the excessive press-fitting load is inward from the outer member 10 via the cage 40. By acting on the member 20, the spherical inner surface 12 of the outer member 10, the spherical outer surface 42 and the spherical inner surface 44 of the retainer 40, and the spherical outer surface 22 of the inner member 20 are indented, and the quality of the joint 1 'is lowered. There is a risk. For this reason, the radial gap between the torque transmission means S ₁ and S ₂ cannot be completely eliminated, and bolt tightening is required.

  On the other hand, when the outer member 10 and the like and the yokes 50a to 50c are fixed by welding, there is no rotation backlash between the two members, but the welded portion is exposed to high temperature, so the accuracy inside the joint is reduced due to strain. There is a risk that cracks may occur and the yield of the joint 1 ′ may decrease.

Further, in the case of adhesion, the radial gap between the torque transmission means S ₁ and S ₂ gradually increases with the aging of the adhesive, and there is a risk that rotation play will occur. In the case of bolt tightening, there is a risk that the bolt loosens due to vibration transmitted from the steering gear 74 side, and rotation play occurs.

  As described above, in the conventional joint 1 ′, even if the yokes 50 a to 50 c are fixed to the outer member 10 and the inner member 20, even if rotation backlash occurs or rotation backlash can be prevented, the yield can be increased. Since there exists a possibility that it may fall, improving the coupling | bonding structure of yoke 50a-50c is desired.

Japanese Patent Laid-Open No. 2003-130082

  The present invention was devised in view of such circumstances, and its object is to improve the coupling structure of the connecting member to the outer member or the inner member, to prevent the backlash of the constant velocity universal joint and its yield. It is in not lowering.

  In order to achieve the above object, the constant velocity universal joint of the present invention has an outer member in which a plurality of track grooves are formed on the inner diameter surface, an inner member in which a plurality of track grooves are formed on the outer diameter surface, and an outer member. The track groove of the inner member and the track groove of the inner member cooperate to form a ball disposed on each of a plurality of ball tracks, and a holding member disposed between the outer member and the inner member to hold the ball. And a connecting member fitted to the outer member or the inner member, in the constant velocity universal joint, an axial protrusion is formed on a fitting portion of at least one of the outer member or the inner member and the connecting member. The outer member is provided by a gap and fitted into the other member with a gap, and at least one of the outer member or the inner member and the connecting member is plastically deformed and locked to the other member. Alternatively, the inner member and connecting member are connected together so that torque can be transmitted. It was.

  In this way, when the outer member (or inner member) and the connecting member are fitted into the gap, the joint performance such as the inner diameter surface of the outer member (or the outer diameter surface of the inner member) is affected by the fitting. Since excessive force does not act on the part to do, the quality of the joint does not deteriorate. Then, by plastically deforming at least one of the outer member (or inner member) and the connecting member, both members can transmit torque and are integrally coupled, and both members are accompanied by plastic deformation. Since the tightening force acts, rotation backlash can be suppressed.

  In the present invention, as described above, the outer member and the connecting member or the inner member and the connecting member are both fitted into the gap and plastically joined. This prevents rotation of the constant velocity universal joint and improves its yield.

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

  FIG. 1 is a longitudinal sectional view of an essential part showing a constant velocity universal joint 1 according to a first embodiment of the present invention. The constant velocity universal joint 1 includes an outer ring 10 as an outer member, an inner member 20, a ball 30, a retainer 40, and a yoke 50 as a connecting member as main components.

The outer ring 10 is formed in a cup shape to which the inner member 20 is fitted via the cage 40, and a fitting portion with the yoke 50 is provided on the side opposite to the fitting side with the inner member 20 (upper side in the drawing). This is a member provided with a through-hole 15. The through hole 15 of the outer ring 10 has a two-stage configuration of a small diameter hole 15 a formed on the end surface side of the outer ring 10 and a large diameter hole 15 b formed on the inner surface side of the outer ring 10. Small-diameter hole 15a is is formed with torque transmission means S ₁ of splines on its inner surface. A stepped engagement portion 15c is formed at the boundary between the small diameter hole 15a and the large diameter hole 15b.

  The inner member 20 is a member provided with a pressing portion 25 that fits the shaft portion 21 on the inner diameter side of the inner ring 23 and that causes an elastic pressing force to act on the tip portion of the shaft portion 21 in the axial direction. The pressing portion 25 is disposed inside the housing 25a formed in a covered cylindrical shape and the housing 25a, and a part of the pressing portion 25 protrudes from the window hole provided on one end surface of the housing 25a to the outside of the housing 25a. A spherical body 25b, and an elastic member 25c such as a coil spring that is disposed inside the housing 25a and on the back side of the spherical body 25b and applies an axial pressing force to the spherical body 25b. It is slidably inserted into a fitting hole 21a provided coaxially with the shaft portion 21 on the surface.

  The ball 30 is disposed on each of the ball tracks formed between the track groove 14 of the outer ring 10 and the track groove 24 of the inner ring 23.

  The retainer 40 is disposed between the outer ring 10 and the inner ring 23, and a lid-shaped receiving part 48 that covers the end face opening on the back side is attached. The receiving portion 48 has a spherical portion 48a at the center thereof, and an attachment portion 48b for the retainer 40 is formed in an annular shape at the peripheral portion thereof. The spherical surface portion 48a has both an inner surface and an outer surface formed into a spherical shape, and receives a pressing force from the pressing portion 25 on the inner surface. Thus, when an axial pressing force is applied between the pressing portion 25 of the inner member 20 and the receiving portion 48 of the retainer 40, the inner member 20 and the retainer 40 are relatively moved in the axial direction, An axial gap between the track grooves 14 and 24 is filled via the ball 30 so that rotation backlash does not occur.

The yoke 50 is a member in which a connecting portion 52 is provided on one end side of the cylindrical portion 51 and a fitting portion 53 is provided on the other end side of the cylindrical portion 51 to be fitted into the through hole 15 of the outer ring 10. In the figure, reference numeral 54 denotes a seal member, which is provided inside the cylinder portion 51 to prevent the lubricant inside the joint from flowing out. The fitting portion 53 a of the yoke 50 is formed with a smaller diameter than the outer diameter of the cylindrical portion 51, and a stepped portion 55 that abuts on the outer surface portion of the outer ring 10 is formed at the boundary with the cylindrical portion 51. Further, the fitting portion 53a of the yoke 50 is formed longer than the small diameter hole 15a of the outer ring 10, and the fitting portion 53a of the yoke 50 is fitted with the stepped portion 55 of the yoke 50 in contact with the outer ring 10 as shown by the broken line in FIG. The front end portion of the joint portion 53 a extends into the large diameter hole 15 b of the outer ring 10. In this state, the front end portion of the fitting portion 53a is plastically deformed to the outer diameter side over the entire circumference by appropriate means such as a press machine to form a crimped portion 51a. As shown by a solid line, the stepped engagement portion 15c in the through hole 15 is engaged with no gap. Thereby, the outer ring | wheel 10 and the yoke 50 couple | bond together. A torque transmission means S ₂ such as a spline that meshes with the torque transmission means S ₁ of the outer ring 10 is formed on the outer diameter surface of the fitting portion 53a, and the torque transmission means S ₁ and S ₂ are connected to each other. In this case, a required radial clearance is provided to suppress the press-fitting load of the outer ring 10 and the yoke 50.

  Thus, when the members 50 are joined by plastically deforming the yoke 50 with respect to the outer ring 10, a tightening force accompanying plastic deformation of the yoke 50 acts between the outer ring 10 and the yoke 50. That is, when the fitting portion 53a of the yoke 50 is plastically deformed to the outer diameter side, the plastic deformation portion of the fitting portion 53a and the peripheral portion thereof are expanded in diameter, and the radial direction between the small diameter hole 15a of the outer ring 10 is increased. Tightening force is applied. Further, an axial tightening force is applied to both end portions of the small diameter hole 15 a of the outer ring 10 by the tip end portion of the fitting portion 53 a of the yoke 50 and the step portion 55. As a result, axial play and rotational play between the outer ring 10 and the yoke 50 are suppressed.

Further, since the required radial gap is provided between the torque transmission means S ₁ and S ₂ of the outer ring 10 and the yoke 50, an excessive press-fitting load is not required when press-fitting them, and the outer ring 10. The spherical inner surface 12, the spherical outer surface 42 and the spherical inner surface 44 of the cage 40, and the spherical outer surface 22 of the inner member 20 are not marked with press fit. Furthermore, since defects such as distortion and cracking do not occur, the yield of the joint 1 can be improved.

  FIG. 2 is a longitudinal sectional view of an essential part showing a constant velocity universal joint 1 according to a second embodiment of the present invention. In addition, in 2nd Example, the same code | symbol is attached | subjected to the same site | part as the constant velocity universal joint 1 of 1st Example, detailed description is abbreviate | omitted, and it demonstrates centering on difference with 1st Example hereafter. .

  In FIG. 2, reference numeral 10 denotes an outer ring, which is different from the outer ring 10 of the first embodiment in that the through hole 15 has a single-stage configuration instead of a two-stage configuration. 50 is a yoke, and a groove-like engagement portion is formed at the boundary between the cylinder portion 51 and the fitting portion 53b. This is different from the yoke 50 of the first embodiment in that 53b1 is formed in the circumferential direction.

  In this constant velocity universal joint 1, the fitting portion 53b of the yoke 50 is fitted into the through hole 15 of the outer ring 10, and the opening end peripheral portion on the end surface side and the inner surface side of the through hole 15 of the outer ring 10 is plastically deformed to the inner diameter side. The outer ring 10 and the yoke 50 are integrally coupled by engaging the crimped portions 15d and 15e with the end portion of the fitting portion 53 of the yoke 50 and the groove-like engaging portion 53b1 without any gap.

In this way, when the members 10 and 50 are joined by plastically deforming the peripheral edge of the opening end of the outer ring 10 with respect to the yoke 50, a tightening force accompanying plastic deformation of the outer ring 10 acts between the outer ring 10 and the yoke 50. To do. That is, the tightening force acting in the radial direction of the yoke 50 with the diameter reduction of the crimping portions 15d and 15e of the outer ring 10 and the axial direction of the fitting portion 53b of the yoke 50 between the crimping portions 15d and 15e of the outer ring 10 Due to the tightening force acting on the outer ring 10, axial play and rotation play between the outer ring 10 and the yoke 50 are suppressed. As a result, a radial gap is provided between the torque transmission means S ₁ and S ₂ of the outer ring 10 and the yoke 50 to reduce the press-fitting load when the outer ring 10 and the yoke 50 are fitted. I can't. Therefore, the rotation play of the constant velocity universal joint can be prevented and the yield can be improved.

  FIG. 3 is a longitudinal sectional view of an essential part showing a constant velocity universal joint 1 according to a third embodiment of the present invention. In the third embodiment, the same parts as those in the constant velocity universal joint 1 of the first and second embodiments are denoted by the same reference numerals, and detailed description thereof is omitted. Hereinafter, differences from the first and second embodiments are described. The explanation will focus on the points.

In FIG. 3, reference numeral 10 denotes an outer ring, and a fitting portion 16 formed in a cylindrical shape from the side opposite to the fitting side with the inner member 20 is extended in the axial direction, and in the first and second embodiments. This is different from the outer ring 10. The fitting portion 16 has a torque transmission means S ₁ such as a spline formed on the inner diameter side thereof. The yoke 50 is different from the yoke 50 of the second embodiment in that the outer diameters of the cylindrical portion 51 and the fitting portion 53b are formed to be substantially the same as the inner diameter of the fitting portion 16 of the outer ring 10.

  This constant velocity universal joint 1 plastically deforms the end portion of the fitting portion 16 of the outer ring 10 toward the inner diameter side in a state where the fitting portion 53b of the yoke 50 is in contact with the inner bottom portion of the fitting portion 16 of the outer ring 10. Thus, the caulking portion 16a is formed, and the caulking portion 16a is engaged with the groove-like engaging portion 53b1 of the yoke 50 without any gap, so that the outer ring 10 and the yoke 50 are integrally coupled.

As described above, when the yoke 50 is fixed by plastically deforming the outer ring 10, a tightening force accompanying plastic deformation of the outer ring 10 acts between the outer ring 10 and the yoke 50. That is, the clamping force acting in the radial direction of the yoke 50 with the diameter reduction of the fitting portion 16 of the outer ring 10 and the axial direction of the yoke 50 between the inner bottom portion of the fitting portion 16 of the outer ring 10 and the crimping portion 16a. Due to the acting tightening force, axial play and rotational play between the outer ring 10 and the yoke 50 are suppressed. As a result, a radial clearance is provided between the torque transmission means S ₁ and S ₂ of the outer ring 10 and the yoke 50, and the press-fit load when the outer ring 10 and the yoke 50 are fitted can be reduced. In addition, there is no press-fitting mark on the retainer 40. Therefore, the rotation play of the constant velocity universal joint can be prevented and the yield can be improved.

  In the third embodiment, the case where the yoke 50 is fitted into the fitting portion 16 of the outer ring 10 has been described, but the reverse is also possible. That is, as shown in FIG. 4, the cup portion 13 that the outer member 10 is fitted to the inner member 20 via the retainer 40 is provided on one end side of the shaft portion 11 that is a fitting portion with the yoke 50. In the case of the provided member, the end portion of the cylindrical portion 51 of the yoke 50 is used as a fitting portion to be fitted to the outer diameter side of the shaft portion 11 of the outer member 10, and the end portion of the cylindrical portion 51 of the yoke 50 is used as the inner diameter. The caulking portion 51a is formed by plastic deformation on the side, and the caulking portion 51a is locked to the groove-like engaging portion 11a provided in the circumferential direction on the outer diameter side of the shaft portion 11 of the outer member 10 without a gap. Let

  Further, the coupling structure of the outer ring 10 and the yoke 50 described in the third embodiment can be applied to the coupling of the inner member 20 and the yoke 50 as shown in FIG. 5 or FIG.

In FIG. 5, reference numeral 20 denotes an inward member, which is provided on a shaft portion 21 having a fitting portion 21 b with a yoke 50 on one end side, and provided on the other end side of the shaft portion 21, and outwardly via a retainer 40 (not shown). This is a member composed of an inner ring 23 fitted to the member 10. Fitting portion 21b of the inner member 20, to form a torque transmission means S ₃ of splines on the outer diameter side, a groove-like engagement portion 21c on the base end side of the torque transmission means S ₃ in the circumferential direction It is. The yoke 50 is different from the yoke 50 of FIG. 4 in that the inner diameter of the cylindrical portion 51 is formed to be approximately the same as the outer diameter of the fitting portion 21b of the inner member 20. This constant velocity universal joint 1 has a cylindrical portion 51 of the yoke 50 fitted on the outer diameter side of the fitting portion 21b of the inner member 20, and an end portion of the cylindrical portion 51 of the yoke 50 is plastically deformed to the inner diameter side. The inner member 20 and the yoke 50 are integrated with each other by forming the crimped portion 51a and engaging the crimped portion 51a with the groove-shaped engaging portion 21c provided on the shaft portion 21 of the inner member 20 without any gap. It is bound to.

  In FIG. 6, reference numeral 20 denotes an inner member, which is different from the inner member 20 of FIG. 5 in that a fitting portion 21d formed in a cylindrical shape on one end side of the shaft portion 21 is extended in the axial direction. Reference numeral 50 denotes a yoke, in which the outer diameter of the fitting portion 53b provided at the end of the cylindrical portion 51 is formed to be substantially the same as the inner diameter of the fitting portion 21d of the inner member 20. FIGS. This is different from the yoke 50. In this constant velocity universal joint 1, the fitting portion 53b of the yoke 50 is fitted into the inner diameter side of the fitting portion 21d of the inner member 20, and the end portion of the fitting portion 21d of the inner member 20 is plastically deformed to the inner diameter side. Thus, the crimped portion 21d1 is formed, and the crimped portion 21d1 is engaged with the groove-like engaging portion 53b1 of the yoke 50 without any gap, so that the inner member 20 and the yoke 50 are integrally coupled.

  As described above, the embodiment of the present invention has been described. However, the present invention is not limited to the above-described embodiment, and various modifications are possible. For example, in FIG. Although it is plastically deformed over the entire circumference, as shown in FIG. 7A, a caulking portion 51b in which the end portion of the fitting portion 53a of the yoke 50 is partially plastically deformed may be formed. Further, as shown in FIG. 7B, a plurality of claw portions 57a may be formed by cutting the end portions of the fitting portions 53a of the yoke 50, and the claw portions 57a may be plastically deformed. Further, as shown in FIG. 7C, a plurality of claw portions 57b may be provided at the end of the fitting portion 53a of the yoke 50, and the claw portions 57b may be plastically deformed. Note that the partial crimping or claw portions 57a and 57b shown in FIGS. 7A to 7C are also applicable to the constant velocity universal joint 1 shown in FIGS.

  Moreover, in the said embodiment, although the groove-shaped engaging part is formed in any one member of the outer member 10 or the inner member 20, and the yoke 50, the other member is each figure of FIG. When partially plastically deforming as described, the engaging portion of one member can be formed in a concave shape. Furthermore, in the said embodiment, although the edge part of any one member of the outer member 10 or the inner member 20 and the yoke 50 is plastically deformed, it is restricted to the edge part of a fitting part. It is also possible to plastically deform the axial intermediate portion.

  Moreover, in the said embodiment, as shown, for example in FIG. 1, etc., while providing the pressing part 25 which makes an elastic pressing force act on an axial direction at the front-end | tip part of the axial part 21 which comprises the inner member 20, a holder | retainer 40 is provided with a receiving portion 48 that receives a pressing force from the pressing portion 25, but either of a pressing portion that causes an elastic pressing force to act in the axial direction and a receiving portion that receives the pressing force from the pressing portion. One is provided on the cage 40 and the other is provided on the inner member 20. Furthermore, the present invention can be applied to any fixed type or some sliding type constant velocity universal joints, in addition to a Rzeppa type joint having a pressing part and a receiving part, and particularly as in a steering device 71 shown in FIG. It is preferable to apply to a constant velocity universal joint that is used for applications that dislike rotating backlash and that is used for transmitting low torque. The steering device 71 may be an electric power steering device (EPS) that applies assisting force by a motor, or may be a hydraulic power steering device that applies assisting force by hydraulic pressure.

It is a principal part expanded longitudinal cross-sectional view of the constant velocity universal joint which concerns on 1st Example of this invention, Comprising: It is a figure which shows the connection structure of the connection member with respect to an outward member. It is a principal part expansion longitudinal cross-sectional view of the constant velocity universal joint which concerns on 2nd Example of this invention, Comprising: It is a figure which shows the connection structure of the connection member with respect to an outward member. It is a principal part expansion longitudinal cross-sectional view of the constant velocity universal joint which concerns on 3rd Example of this invention, Comprising: It is a figure which shows the connection structure of the connection member with respect to an outward member. It is a principal part expanded longitudinal cross-sectional view which shows the modification of the constant velocity universal joint which concerns on 3rd Example of this invention, Comprising: It is a figure which shows the connection structure of the connection member with respect to an outward member. It is a principal part expanded longitudinal cross-sectional view which shows the modification of the constant velocity universal joint which concerns on 3rd Example of this invention, Comprising: It is a figure which shows the connection structure of the connection member with respect to an inward member. It is a principal part expanded longitudinal cross-sectional view which shows the modification of the constant velocity universal joint which concerns on 3rd Example of this invention, Comprising: It is a figure which shows the connection structure of the connection member with respect to an inward member. (A) The figure thru | or (C) figure are principal part expansion longitudinal cross-sectional views which show the modification of this invention. It is a longitudinal cross-sectional view which illustrates the conventional constant velocity universal joint. It is the schematic of a steering device. It is a principal part expansion longitudinal cross-sectional view which illustrates the conventional constant velocity universal joint, Comprising: It is a figure which shows the connection structure of the connection member with respect to an outer member or an inner member.

Explanation of symbols

1 Constant velocity universal joint 10 Outer member (outer ring)
11 Shaft portion 11a Groove-shaped engaging portion 12 of outer member 12 Spherical inner surface 13 Cup portion 14 Track groove 15 Through hole 15a Small-diameter hole 15b Large-diameter hole 15c Step-shaped engaging portions 15d and 15e of outer ring Caulking portion 16 Outside Fitting portion 16a of side member Clamping portion 20 Inner member 21 Shaft portion 21a Groove-like engagement portion 21b of inner member Fitting portion 21b1 of inner member Clamping portion 22 Spherical outer surface 23 Inner ring 24 Track groove 25 Press Part 30 Ball 40 Cage 42 Spherical outer surface 44 Spherical inner surface 46 Ball pocket 48 Receiving part 50 Yoke 51 Tube part 51a Caulking part 51b Caulking part 52 Connection part 53a Yoke fitting part 53b Yoke fitting part 53b1 Yoke groove Jo engagement portion 54 sealing member 55 stepped portion 57a, 57 b claw portion S ₁ the outer member of the torque transmitting means S ₂ yokes of the torque transmission means S ₃ inner member of the torque transmission means

Claims (12)

  An outer member having a plurality of track grooves formed on the inner diameter surface, an inner member having a plurality of track grooves formed on the outer diameter surface, and the track grooves of the outer member and the track grooves of the inner member cooperate with each other. A ball disposed on each of a plurality of formed ball tracks; a cage disposed between the outer member and the inner member to hold the ball; and a connecting member fitted to the outer member. In the constant velocity universal joint, an axial protrusion is provided at a fitting portion of at least one member of the outer member and the connecting member so that the other member is clearance-fitted, and at least one of the outer member and the connecting member. A constant velocity universal joint characterized in that one member is plastically deformed and locked to the other member so that the outer member and the connecting member are integrally coupled so as to transmit torque.   The outer member is formed in a cup shape for fitting the inner member via the cage, and has a fitting portion with the connecting member on the opposite side to the fitting side with the inner member. A through hole is formed in the fitting portion of the outer member, the fitting portion of the connecting member is fitted into the through hole of the outer member, and the fitting portion of the connecting member is disposed on the outer diameter side. The constant velocity universal joint according to claim 1, wherein the constant velocity universal joint is plastically deformed to be engaged with an engaging portion provided inside the outer member.   The outer member is formed in a cup shape for fitting the inner member via the cage, and has a fitting portion with the connecting member on the opposite side to the fitting side with the inner member. A through-hole is formed in the fitting portion of the outer member, the fitting portion of the connecting member is fitted into the through-hole of the outer member, and the opening edge periphery of the through-hole of the outer member 2. The constant velocity universal joint according to claim 1, wherein the portion is plastically deformed toward an inner diameter side and is engaged with an engaging portion provided in a fitting portion of the connecting member.   The outer member is formed in a cup shape for fitting the inner member through the retainer, and a fitting portion formed in a cylindrical shape from the side opposite to the fitting side with the inner member is pivoted. A fitting portion of the connecting member is fitted on the inner diameter side of the fitting portion of the outer member, and the fitting portion of the outer member is plastically deformed on the inner diameter side. The constant velocity universal joint according to claim 1, wherein the constant velocity universal joint is engaged with an engaging portion provided in a fitting portion of the connecting member.   The outer member is formed in a cup shape for fitting the inner member through the cage, and a shaft portion extends from the opposite side to the fitting side with the inner member. The fitting member is provided with a fitting portion to be fitted to the connecting member, and the fitting portion of the connecting member is formed in a cylindrical shape and fitted on the outer diameter side of the fitting portion of the outer member. The constant velocity according to claim 1, wherein the fitting portion of the connecting member is plastically deformed to an inner diameter side and is engaged with an engaging portion provided in the fitting portion of the outer member. Universal joint.   An outer member having a plurality of track grooves formed on the inner diameter surface, an inner member having a plurality of track grooves formed on the outer diameter surface, and the track grooves of the outer member and the track grooves of the inner member cooperate with each other. A ball disposed on each of a plurality of formed ball tracks; a cage disposed between the outer member and the inner member to hold the ball; and a connecting member fitted to the inner member. In the constant velocity universal joint, an axial protrusion is provided at a fitting portion of at least one of the inner member and the connecting member so that the other member is fitted with a gap, and at least one of the inner member and the connecting member. A constant velocity universal joint characterized in that the inner member and the connecting member are integrally coupled so as to be able to transmit torque by plastically deforming one of the members and engaging the other member.   The inner member includes a shaft portion having a fitting portion with the connecting member on one end side, and an inner ring provided on the other end side of the shaft portion and fitted to the outer member via the retainer. A fitting portion of the connecting member is formed in a cylindrical shape and fitted on the outer diameter side of the fitting portion of the inner member, and the fitting portion of the connecting member is plastic on the inner diameter side. The constant velocity universal joint according to claim 6, wherein the constant velocity universal joint is deformed and locked to an engaging portion provided in a fitting portion of the inner member.   The inner member includes a shaft portion having a fitting portion formed in a cylindrical shape on one end side, and an inner ring that is provided on the other end side of the shaft portion and is fitted to the outer member via the retainer. A fitting portion of the inner member is fitted to the outer diameter side of the fitting portion of the connecting member, and the fitting portion of the inner member is plastically deformed to the inner diameter side, The constant velocity universal joint according to claim 6, wherein the constant velocity universal joint is engaged with an engaging portion provided in a fitting portion of the connecting member.   The constant velocity universal joint according to any one of claims 1 to 8, wherein one member of the outer member or the inner member and the connecting member is press-fitted into the other member.   The fitting portion of at least one member of the outer member or the inner member and the connecting member is plastically deformed over the entire circumference thereof. The constant velocity universal joint described in 1.   The fitting portion of at least one member of the outer member or the inner member and the connecting member is partially plastically deformed, according to any one of claims 1 to 9. Constant velocity universal joint.   The inner diameter surface of the outer member and the outer diameter surface of the inner member are each formed into a spherical shape, and a pressing portion that causes an elastic pressing force to act in the axial direction and a receiving force that receives the pressing force from the pressing portion A fixed type constant velocity universal joint in which one of the parts is provided in the cage and the other is provided in the inner member, and the steering device is disposed between the steering wheel and the steering gear of the vehicle. The constant velocity universal joint according to claim 1, wherein the constant velocity universal joint is used.

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