JP2003194088A - Constant velocity joint unit assembling method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a constant velocity joint unit assembling method capable of rolling a rolling body in the excellent condition without changing the pre- pressure of the rolling body when pressing a shaft into a shaft insertion hole of a second joint member forming the constant velocity joint unit assembling. <P>SOLUTION: A jig Z is made to abut on a plane part 29b of a recessed part 29 to press the shaft 44 into the insertion hole 43a of an inner lathe 43 arranged inside of an outer lathe 31. Even if the pressure is applied to the plane part 29a, deformation of a caulking part 30a and a fitting flange 26 can be prevented, and the pressure to be applied to the outer later 31 when the inner ring 16 is brought in contact with pressure is not changed. Change in the pre-pressure to be applied to a ball 17 forming an angular ball bearing mechanism T due to assembling of the shaft 44 can be prevented, and the ball 17 can roll in an excellent condition. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for assembling a constant velocity joint unit for rotatably supporting a wheel with respect to a suspension system on the vehicle body side.

[0002]

2. Description of the Related Art Conventionally, in vehicles such as automobiles,
The wheels are rotatably supported by a suspension device on the vehicle body side via a constant velocity joint unit.

A known constant velocity joint unit of this type is shown in FIG. In FIG. 3, the left side is called the outboard side and the right side is called the inboard side.

The constant velocity joint unit 81 includes an outer ring 84, an inner ring 85, a plurality of balls 86, and an outer joint member 87.
Is equipped with. A mounting flange 88 for fixing the outer ring 84 to a vehicle body (not shown) is formed on the outer peripheral surface of the outer ring 84. The inner ring 85 and the outer joint member 87 are rotatably supported in the outer ring 84 via the plurality of balls 86. Further, on the outer peripheral surface of the inner ring 85, the inner ring 8 is
A mounting flange 89 for fixing 5 is formed. A connecting hole 85a is formed in the inner ring 85.

The outer joint member 87 has a recessed portion 95 at its tip.
Is provided with a bowl-shaped outer race portion 91, and the shaft portion 90 is serrated to the connecting hole 85a. The tip portion of the shaft portion 90 is caulked to the inner peripheral surface portion of the inner ring 85 where the diameter is increased. Less than,
A tip portion of the shaft portion 90 crimped to the inner ring 85 is referred to as a crimp portion 90a. An angular contact ball bearing mechanism 92 is configured by the inner surface portion of the outer ring 84, the outer surface portion of the outer race portion 91 corresponding to the outer ring 84, and the ball 86. The preload applied to the ball 86 is arbitrarily determined by the amount of caulking of the crimp portion 90a.

On the inner peripheral surface of the outer race portion 91, three torque transmission balls 101 supported by the cage 100 are rollably arranged. Inside the cage 100, an inner race 102 is arranged on the torque transmission balls 101. It is arranged so that it can roll. The inner race 102 has an insertion hole 102a, and the shaft 103 is press-fitted and serrated to the insertion hole 102a.

When assembling the constant velocity joint unit 81, the outer ring 84, the inner ring 85, a plurality of balls 86 and the outer joint member 87 are first assembled. Next, the tip end of the shaft portion 90 is swaged by a swaging method to form a caulking portion 90a, and the caulking portion 90a presses the inner race 85 and the outer race portion 91 together. As a result,
An arbitrary preload is applied to the ball 86. Further, the cage 100 and the torque transmission ball 1 are provided in the outer race portion 91.
01 and the inner race 102 are arranged. And the inner ring 8
The jig A was brought into contact with the outboard side of No. 5, and the shaft 103 was press-fitted into the insertion hole 102a of the inner race 102.

[0008]

However, when the shaft 103 is press-fitted into the insertion hole 102a, the jig A is applied to the outboard side of the inner ring 85, so that the inner ring 85 and the outer race portion 91 are pressed against each other. The condition changes. Then, the preload on the ball 86, which was in the optimum state at the time of the caulking work, changed, and as a result,
The life of the angular ball bearing mechanism 92 may be shortened.

It is also conceivable that the jig B shown by the two-dot chain line in FIG. 3 is brought into contact with the caulking portion 90a and the shaft 103 is press-fitted into the insertion hole 102a. The preload on the ball 86 sometimes changed.

It is also conceivable that the annular jig C shown by the two-dot chain line in FIG. 3 is brought into contact with the outboard side of the mounting flange 89 to press fit the shaft 103 into the insertion hole 102a. However, in this case, the mounting flange 89 may be deformed, and the adhesion may be impaired when the mounting flange 89 is fixed to a wheel (not shown).

The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to provide a rolling element when a shaft is press-fitted into a shaft insertion hole of a second joint member constituting a constant velocity joint assembly. It is an object of the present invention to provide a method for assembling a constant velocity joint unit capable of rolling a rolling element in a good condition without changing the preload.

[0012]

In order to achieve the above object, the invention as set forth in claim 1 provides a connecting member having a connecting hole, and a shaft having a concave portion on the end face, which is inserted into the connecting member. And a first joint member having a bowl-shaped outer race portion connected to the coaxial portion, and swingably connected to the inside of the outer race portion via a rolling member.
A second joint member that constitutes a constant velocity joint together with the joint member and the rolling member, and a bearing member that rotatably supports the connecting member and the first joint member via rolling elements, etc. A constant velocity joint assembly, in which the shaft end of the shaft portion is caulked to the connecting member to assemble the shaft to the constant velocity joint assembly in which the rolling element is preloaded. In the joint unit assembling method, the gist is that a jig is brought into contact with the bottom of the recess to press the shaft into a shaft insertion hole provided in the second joint member.

According to a second aspect of the present invention, in the method for assembling a constant velocity joint unit according to the first aspect, the bottom of the recess is arranged on the axis of the first joint member, and the shaft has its own axis. And the axis of the first joint member can be aligned with each other, and the shaft is press-fitted into the shaft insertion hole in a state where the shaft and the jig are substantially aligned. Is the gist.

According to a third aspect of the present invention, in the method for assembling the constant velocity joint unit according to the first or second aspect, the bottom portion of the recess has a flat surface portion, and the jig is attached to the flat portion. The gist is to bring it into contact with the flat portion.

According to a fourth aspect of the present invention, in the method for assembling the constant velocity joint unit according to any one of the first to third aspects, the bearing member is provided with the constant velocity joint unit. The gist of the present invention is to have a vehicle body mounting flange for mounting to a vehicle, and the connecting member to have a wheel mounting flange for mounting a wheel on the outer periphery. (Operation) Therefore, in the invention described in claim 1, since the jig is brought into contact with the bottom of the recess to press the shaft into the shaft insertion hole of the second joint member in the constant velocity joint assembly, The connecting member and the shaft end of the caulked shaft portion do not deform.

According to the invention of claim 2, in addition to the effect of claim 1, the shaft is press-fitted into the shaft insertion hole in a state where the shaft and the jig are substantially aligned, The pressure input is less likely to be dispersed and easy to insert.

According to the invention of claim 3, in addition to the operation of claim 1 or claim 2, since the jig is brought into contact with the flat surface portion of the bottom portion, the flat surface portion is uniformly pressed. Is added.

According to the invention of claim 4, in addition to the operation of any one of claims 1 to 3, the vehicle body mounting flange is mounted on the vehicle side, and the wheel mounting flange is mounted on the wheel. It is attached.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) A first embodiment of the present invention will be described below with reference to FIG.

In this embodiment, the left side is called the outboard side and the right side is called the inboard side in FIG.
As shown in FIG. 1, the constant velocity joint unit 11 includes an outer ring 15 as a bearing member, an inner ring 16 as a connecting member,
Ball 17 as a plurality of rolling elements, constant velocity joint 18
The outer joint member 19 of FIG. The outer joint member 1
9 corresponds to the first joint member. A projecting portion 20 is formed on a central portion of the inner peripheral surface of the outer ring 15 in the direction of the axis O, and both side surfaces of the projecting portion 20 in the direction of the axis O are arcuate raceway surfaces 21 and 22. The axis O means the axis of the outer joint member 19. The outboard side is the raceway surface 21, and the inboard side is the raceway surface 22.

A mounting flange 23 as a vehicle body mounting flange is formed on the outer peripheral surface of the outer ring 15, and several positions (only one is shown in FIG. 1) in the circumferential direction of the mounting flange 23.
A bolt insertion hole 23a is formed in the. A bolt (not shown) is inserted into the bolt insertion hole 23a, and the outer ring 15 is fixed to the vehicle body (not shown) by the bolt. Inside the outer ring 15, the plurality of balls 1
The inner ring 16 and the outer joint member 19 are rotatably supported via the shaft 7.

On the outer peripheral surface of the inner race 16, the end portion on the inboard side is recessed, and a first raceway surface 25 having an arc shape is formed in the recessed portion. Also, the inner ring 1
A mounting flange 26 as a wheel mounting flange is formed substantially at the center of the outer peripheral surface of the shaft 6 in the direction of the axis O. Bolt insertion holes 26a are formed at several locations (only one is shown in FIG. 1) in the circumferential direction of the mounting flange 26. Are formed. A bolt (not shown) is inserted into the bolt insertion hole 26a, and the inner ring 16 is fixed to the wheel (not shown) by the bolt. Further, the inner ring 16 is formed with a connecting hole 16a.

The outer joint member 19 has a recessed portion 29 on the front end surface.
And a shaft-shaped outer race portion 31 having a bowl shape. A flat surface portion 29 is formed at the center of the bottom portion 29a of the recess 29.
b, and the plane portion 29b is arranged on the axis O.

The shaft portion 30 has the connecting hole 16 of the inner ring 16.
The shaft portion 30 and the inner ring 16 are inserted into a and are integrally rotatably coupled by serration coupling. The shaft 3
The leading end portion (shaft end) of 0 is caulked to the inner peripheral surface portion of the inner ring 16 having the enlarged diameter. Hereinafter, the tip portion of the shaft portion 30 crimped to the inner ring 16 is referred to as a crimp portion 30a. On the outer peripheral surface of the outer race portion 31, the end portion on the outboard side is recessed, and a second raceway surface 32 having an arc shape is formed in the recessed portion.

The plurality of balls 17 on the outboard side are in contact with the raceway surfaces 21, 25, and the plurality of balls 17 in the inboard side are in contact with the raceway surfaces 22, 32. The outer ring 15, the inner ring 16, the balls 17, and the outer joint member 19 constitute an angular ball bearing mechanism T. In the outer ring 15, seals 35 and 36 are attached to the openings at both ends in the direction of the axis O, respectively. The seal 3
5 and 36 are configured to prevent leakage of grease filled in a space formed by the outer ring 15, the inner ring 16 and the outer joint member 19 and intrusion of water or foreign matter from the outside.

On the inner peripheral surface of the outer race portion 31, 3
Three or more track grooves 31a are provided, and torque transmission balls 40 as three or more rolling members are rotatably arranged in the track grooves 31a. In addition,
In FIG. 1, only one track groove 31a and one torque transmission ball 40 are shown. Each of the torque transmission balls 40 is held by a cage 41.

Inside the cage 41, an inner race 43 as a second joint member having three or more track grooves 42 on the outer peripheral surface is arranged (in FIG. 1, only one track groove 42 is shown). The torque transmission balls 40 are rollably arranged in the track grooves 42, respectively. The inner race 43 is formed with an insertion hole 43a as a shaft insertion hole.
A shaft 44 is press-fitted to the shaft and is serrated. The axis of the shaft 44 can coincide with the axis O.

The outer joint member 19, the torque transmitting balls 40, and the inner race 43 constitute a ball type constant velocity joint 18. In addition, the outer ring 15,
Inner ring 16, ball 17, outer joint member 19, seal 3
5, 36, the torque transmission ball 40, the cage 41, and the inner race 43 constitute the constant velocity joint assembly 12. In addition, the constant velocity joint unit 11 includes the constant velocity joint assembly 12 and the shaft 44.

Next, a method of assembling the constant velocity joint unit 11 of this embodiment will be described. First, the outer ring 15, the inner ring 16, the ball 17, and the outer joint member 1
9 and the seals 35 and 36 are combined. Then, the tip end portion of the shaft portion 30 is caulked and deformed outward in the radial direction by a swing caulking method or the like to form the caulked portion 30a. Then, the caulked portion 30a is brought into pressure contact with the expanded inner peripheral surface portion of the inner ring 16 at a predetermined pressure, whereby the inner ring 1
6, the inner race 16 and the outer race portion 31 are pressed against each other. Then, the inner race 16 and the outer race portion 31 are brought into pressure contact with each other, whereby a predetermined preload is applied to the ball 17.

Next, the torque transmission ball 40, the cage 41, and the inner race 43 are arranged in the outer race portion 31. Then, with the jig Z in contact with the flat surface portion 29b of the concave portion 29, the insertion hole 4 of the inner race 43 is inserted.
The shaft 44 is press-fitted into 3a. At this time, the shaft 44 is press-fitted into the insertion hole 43a while the shaft 44 and the jig Z are substantially aligned with each other. Then, the pressure input is not dispersed and the shaft 44 is easily inserted into the insertion hole 43a.

When assembled in this manner, the caulking portion 30a and the mounting flange 26 will not be deformed even when a pressing force is applied to the flat surface portion 29b, and the pressure at which the inner race 16 is brought into pressure contact with the outer race portion 31. Does not change. Therefore, the preload applied to the ball 17 does not change due to the assembly of the shaft 44.

Therefore, according to the constant velocity joint unit 11 of this embodiment, the following effects can be obtained. (1) In the present embodiment, the jig Z is brought into contact with the flat surface portion 29b of the concave portion 29, and the shaft 4 is inserted into the insertion hole 43a of the inner race 43 arranged in the outer race portion 31.
4 was press-fitted. Even if a pressing force is applied to the flat surface portion 29b, the caulking portion 30a and the mounting flange 2
6 does not deform, and the pressure with which the inner race 16 presses against the outer race portion 31 does not change.

Therefore, the preload applied to the ball 17 does not change due to the assembly of the shaft 44, and the ball 17 can roll in a good state. Further, since the balls 17 can roll in a good state, the life of the angular ball bearing mechanism T, and eventually the constant velocity joint unit 1
The life of 1 can be extended. In addition, since the mounting flange 26 does not deform when the shaft 44 is assembled, even if the mounting flange 26 is fixed to a wheel (not shown), the adhesion between the mounting flange 26 and the wheel is not impaired. Further, since the jig Z is brought into contact with the flat surface portion 29b of the concave portion 29, pressure can be evenly applied to the flat surface portion 29b as compared with the case where the jig Z is brought into contact with a non-flat surface.

(2) In this embodiment, the shaft 44 is press-fitted into the insertion hole 43a in a state where the shaft 44 and the jig Z are substantially aligned with each other. Therefore, the force for press-fitting the shaft 44 into the insertion hole 43a is not dispersed, and the shaft 44 is easily inserted into the insertion hole 43a.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIG. The constant velocity joint unit 51 of the present embodiment is the constant velocity joint 18 of the constant velocity joint unit 11 of the first embodiment.
It is equivalent to the one that is changed to a tripod type constant velocity joint.

That is, the constant velocity joint 52 of the constant velocity joint unit 51 includes the outer joint member 19, the torque transmission roller 53 as the rolling member, and the inner race 56 as the second joint member having the trunnion 55. ing.

On the inner peripheral surface of the outer race portion 31 of this embodiment, three pairs of track grooves 58 are provided, and three torque transmission rollers 53 are respectively rotatably arranged in the three pairs of track grooves 58. Has been done. In FIG. 2, only one of the pair of track grooves 58 and one torque transmission roller 53 are shown. Each torque transmission roller 53 is rotatably supported by a trunnion 55 via a needle bearing 54. The inner race 56 is formed with an insertion hole 56a as a shaft insertion hole, and the shaft 44 is press-fitted and serrated to the insertion hole 56a.

The inner race 56 having the outer ring 15, the inner ring 16, the ball 17, the outer joint member 19, the seals 35 and 36, the torque transmission roller 53, the needle bearing 54, and the trunnion 55 forms a constant velocity joint assembly 57. It is configured. In addition, the constant velocity joint unit 51
Is composed of the constant velocity joint assembly 57 and the shaft 44.

Next, a method of assembling the constant velocity joint unit 51 of this embodiment will be described. First, the constant velocity joint assembly 57 is assembled. After that, the recess 2
In the state where the jig Z is brought into contact with the flat surface portion 29b of 9,
The shaft 44 is inserted into the insertion hole 56a of the inner race 56.
Press fit. At this time, the shaft 44 and the jig Z
The shaft 44 is press-fitted into the insertion hole 56a in a state where and are substantially aligned. Then, the pressure input is not dispersed and the shaft 44 is easily inserted into the insertion hole 56a.

Therefore, according to the constant velocity joint unit 51 of this embodiment, (1) and (2) of the first embodiment are used.
The same effect as can be obtained. (Other Embodiments) The above embodiments may be embodied by being changed to other embodiments as described below.

In each of the above-described embodiments, the inner ring 16 and the outer joint member 19 are rotationally supported with respect to the outer ring 15 by the angular ball bearing mechanism T employing the balls 17 as rolling elements. The present invention is not limited to this, and the inner ring 1 with respect to the outer ring 15 is formed by a tapered roller bearing mechanism that uses tapered rollers as rolling elements.
6 and the outer joint member 19 may be rotationally supported. Further, any bearing mechanism may be used for the constant velocity joint units 11 and 51 as long as the bearing mechanism applies a load to the rolling elements in both the thrust direction and the radial direction.

In each of the above-mentioned embodiments, the constant velocity joints 18, 52 as shown in FIGS. 1 and 2 are adopted. However, the present invention is not limited to this, and the constant velocity joints having an insertion hole for press-fitting the shaft 44. Any constant velocity joint may be adopted for the constant velocity joint units 11 and 51.
Also in this case, the shaft is press-fitted into the insertion hole while the jig Z is brought into contact with the flat surface portion 29b.

In the first embodiment, the jig Z is brought into contact with the flat surface portion 29b of the recess 29 so that the outer race portion 3
The shaft 44 is press-fitted into the insertion hole 43a of the inner race 43 arranged in the inner part 1. Not limited to this, a jig that comes into contact with the entire bottom portion 29a is prepared, and the recess 2
The jig is brought into contact with the bottom portion 29a of the inner race 9 and the insertion hole 4 of the inner race 43 arranged in the outer race portion 31
The shaft 44 may be press-fitted into the 3a. Also, the constant velocity joint unit 51 of the second embodiment may be assembled by such a method. It is preferable that the jig Z is brought into contact with the flat surface portion 29b as in the above-described embodiment so that the pressure is evenly applied and that the component force in the radial expansion direction is not generated, so that the bearing pressurization is not changed. .

In the first embodiment, the shaft 44 is press-fitted into the insertion hole 43a while the shaft 44 and the jig Z are substantially aligned with each other. Not limited to this, the shaft 44 may be press-fitted into the insertion hole 43a in a state where the shaft 44 and the jig Z are not substantially aligned with each other. Also, the constant velocity joint unit 51 of the second embodiment may be assembled by such a method.

In each of the above embodiments, the outer race portion 3
The ball 17 is configured to roll with respect to the first second raceway surface 32. Not limited to this, an annular intervening member is provided on the outer periphery of the shaft portion 30, the inner race 16 and the outer race portion 31 are brought into contact with both sides of the intervening member in the direction of the axis O, and the second raceway surface 32 is used as the interposing member. The ball 17 may be provided on the outer circumference of the ball, and the ball 17 may be rolled on the outer peripheral surface of the intervening member.

Next, technical ideas that can be understood from the above-described embodiments and other embodiments will be described below. (A) The rolling member is a torque transmitting ball, and the constant velocity joint is a ball type constant velocity joint.
The method for assembling the constant velocity joint unit according to the item.

(B) The rolling member is a torque transmission roller, and the constant velocity joint is a tripod type constant velocity joint.
The method for assembling a constant velocity joint unit according to any one of the above.

[0048]

As described above in detail, according to the inventions described in claims 1 to 4, when the shaft is press-fitted into the shaft insertion hole of the second joint member constituting the constant velocity joint assembly, The rolling element can be rolled in a good state without changing the preload of the moving element.

[Brief description of drawings]

FIG. 1 is a sectional view of a constant velocity joint unit according to a first embodiment.

FIG. 2 is a sectional view of a constant velocity joint unit according to a second embodiment.

FIG. 3 is a sectional view of a constant velocity joint unit according to a conventional technique.

[Explanation of symbols]

11, 51 ... Constant velocity joint unit, 15 ... Outer ring as bearing member, 16 ... Inner ring as connecting member, 16a ...
Connection hole, 17 ... Ball as rolling element, 18, 52 ... Constant velocity joint, 19 ... Outer joint member as first joint member, 23 ... Mounting flange as vehicle body mounting flange, 2
6 ... Mounting flange as wheel mounting flange, 29a ...
Bottom as a bottom of the recess, 40 ... torque transmission balls as rolling members, 43, 56 ... inner races as second joint members, 43a, 56a ... insertion holes as shaft insertion holes, 44 ... shaft, 53 ... rolling Torque transmission roller as moving member, 90 ... Shaft portion, 91 ... Outer race portion, O ...
The axis as the axis of the first joint member, Z ... Jig.

Claims (4)

[Claims] 1. A first member comprising a connecting member having a connecting hole, a shaft portion inserted into the connecting hole and having a concave portion on an end face thereof, and a bowl-shaped outer race portion connected to a coaxial portion. A joint member, a second joint member that is swingably connected to the outer race portion through a rolling member, and forms a constant velocity joint together with the first joint member and the rolling member, and the connecting member. A constant velocity joint assembly including the first joint member and a bearing member that rotatably supports the first joint member via a rolling element, wherein a shaft end of the shaft portion is caulked to the connecting member. A constant velocity joint unit assembling method for assembling a shaft to a constant velocity joint assembling body in which a preload is applied to the rolling element, wherein a jig is brought into contact with a bottom portion of the concave portion, For 2 joint members The constant velocity joint unit assembling method characterized by press-fitting the digits shaft insertion hole. 2. The bottom of the recess is arranged on the axis of the first joint member, and the shaft is provided so that the axis of itself and the axis of the first joint member can coincide with each other, With the shaft and the jig in a substantially straight line,
The method for assembling a constant velocity joint unit according to claim 1, wherein the shaft is press-fitted into the shaft insertion hole. 3. The constant velocity joint unit assembly according to claim 1, wherein the recess has a flat surface at the bottom thereof, and the jig is brought into contact with the flat surface. Attaching method. 4. The bearing member has a vehicle body mounting flange for mounting the constant velocity joint unit on a vehicle, and the coupling member has a wheel mounting flange for mounting a wheel on an outer periphery thereof. The method for assembling a constant velocity joint unit according to any one of claims 1 to 3, wherein: