JPH07332358A - Installation structure for thrust bearing - Google Patents

Abstract

PURPOSE:To prevent the breakage of the whole thrust beating due to the swivel motion, by reducing the curvature, breakage, etc., of an engagement hook part and reducing the swivel motion of the whole thrust bearing. CONSTITUTION:Concerning the installation structure for a thrust bearing 4 which is constituted of a number of needle rollers 6 which are interposed between the members 2 and 3 at least one between which is a rotary body and is held on a bearing retainer 5 and one and the other bearing races 7 and 8 which are arranged on both of the sides of these needle rollers 6 a check guide 12 engaged with the engagement hole part 10 of one member 2 is installed on one bearing race 7. Further, the roller orbital surface part 15 of one bearing race 7 is formed to a projection surface so as to be opposed to the crowning shape of the needle roller 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thrust bearing mounting structure arranged in an automatic transmission or the like.

[0002]

2. Description of the Related Art In general, a thrust bearing 20 is interposed between rotating bodies 21 and 22 as shown in FIGS. 3 and 4, and has a large number of needle rollers 24 held by a bearing retainer 23 and these needle rollers 24. It is composed of bearing races 25 and 26 arranged on both sides of the roller 24. The thrust bearing 20 is mounted by engaging claw portions 27 formed on the outer peripheral edge portion of the bearing race 25.
Is engaged with an engagement hole 28 formed in the surface of the rotating body 21 to regulate the circumferential movement of the bearing race 25.

[0003]

However, in the case of the above-mentioned conventional thrust bearing mounting structure, there are cases where the engaging claw portion 27 does not reliably engage with the engaging hole portion 28.
If other parts are assembled in this disengaged state, there is a problem that the engaging claw portion 27 is bent or broken because the bearing race 25 is thin.

Further, the needle roller 24 is crowned to make the rolling diameter uniform, but as shown in FIG. 5, the roller raceway surface portion 28 of the bearing race 25 contacting the needle roller 24 is When the needle roller 24 has a concave shape, the needle roller 24 comes into contact with the roller raceway surface portion 28 at the edge 24a in the radial direction, the peripheral speed of the needle roller 24 is changed, and the thrust bearing 20 as a whole is rubbed and damaged. There was a problem of reaching.

The present invention has been made in view of the above problems, and its purpose is not only to eliminate the bending and breakage of the engaging claws but also to make the entire thrust bearing. It is an object of the present invention to provide a mounting structure for a thrust bearing in which the grazing motion is reduced and damage to the entire thrust bearing due to this rasping motion can be prevented.

[0006]

In order to achieve the above object, the present invention provides a large number of needle rollers which are interposed between members, at least one of which is a rotating body, and which are held by a bearing retainer. In a thrust bearing mounting structure composed of one and the other bearing races arranged on both sides of the needle roller, a check guide that engages with an engagement hole portion of one member is provided on one of the bearing races. The roller raceway surface portion of one of the bearing races is convex so as to face the crowning shape of the needle roller.

Further, a pointed engagement claw portion is formed on the tip portion of the check guide, and the outer peripheral edge portion of one bearing race is positioned on both sides of the chuck guide and the outer peripheral edge portion of the bearing race. A cut portion may be formed so as to be cut inward from the portion, or one of the bearing races may be a pressed product in which the convex shape of the roller raceway surface portion is changed depending on the plate thickness.

[0008]

With this structure, when the thrust bearing is mounted along the surface of the member, the engaging claw portion of the chuck guide of the bearing race is engaged with the engaging hole portion, and the circumferential direction of the bearing race is increased. The movement is restricted and other parts are attached.

Further, since the roller race portion of the bearing race is made to have a convex surface so as to face the crowning shape of the needle roller, the same circumference of the needle roller is provided even when the thrust bearing is idling and when a load is applied. The above contact prevents "edge load of the needle roller" and reduces rubbing movement of the entire thrust bearing.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a sectional view of the thrust bearing mounting structure according to the present invention with a part omitted, FIG. 2 (1) is a front view of a bearing race of the thrust bearing mounting structure, FIG.
(2) is a side view of the bearing race, (3) in FIG.
2 is an enlarged view of part A of the bearing race, and FIG. 2 (4) is a view from the direction B of FIG. 2 (3).

As shown in FIG. 1, one member 2 and the other member 3 are arranged on the shaft 1, and a thrust bearing 4 is interposed between these members 2 and 3. One and the other members 2 and 3 may both be rotary members, or one of the members 2 and 3 may be a rotary member and the other member may be a fixed member. The thrust bearing 4 is composed of a large number of needle rollers 6 held by a bearing retainer 5 and bearing races 7 and 8 arranged on both sides of the needle rollers 6.

On the surface portion of the one member 2, engaging hole portions 10 for engaging with a later-described chuck guide of the one bearing race 7 are formed at predetermined intervals in the circumferential direction.
The needle roller 6 has a crowned peripheral surface portion 6a.

The bearing race 7 has an annular race body 11 as shown in FIG. 2, and a plurality of chuck guides 12 are provided on the outer peripheral edge of the race body 11 at predetermined intervals in the circumferential direction. Is formed, and these chuck guides 12 are bent at a substantially right angle at an intermediate portion thereof,
The tip side of the bent portion is formed as an engaging claw portion 13, and the engaging claw portion 13 is a pointed tip that becomes narrower toward the tip.

Further, the outer peripheral edge portion of the race body 11 is formed with a notch portion 14 which is located on both sides of the chuck guide 12 and which is cut inward from the outer peripheral edge portion of the race body 11. The length of the chuck guide 12 is lengthened by these notches 14, and the chuck guide 12 is provided with springiness.

A surface of the race body 11 facing the needle roller 6 is formed as a roller raceway surface portion 15. The roller raceway surface portion 15 has a convex surface so as to face the crowning shape of the needle roller 6. Has been done. Further, a surface portion of the bearing race 8 facing the needle roller 6 is formed as a roller raceway surface portion 16. The bearing race 7 is a pressed product in which the convex shape of the roller raceway surface portion 15 is changed depending on the plate thickness.

In the thrust bearing 4, the engaging claw portion 13 of the chuck guide 12 of the one bearing race 7 is engaged with the engaging hole portion 10, and the other bearing race 8 is aligned with the other member 3. In addition, it is interposed between the one and the other members 2, 3. In this case, the needle roller 6 is in contact with the roller raceway surface portions 15 and 16 of the one and the other bearing races 7 and 8.

Next, the operation of the thrust bearing mounting structure constructed as above will be described.

When the thrust bearing 4 is attached along the surface of the one member 2, the engaging claw portion 13 of the chuck guide 12 of the one bearing race 7 is engaged with the engaging hole portion 10, The bearing race 7 is attached by restricting its circumferential movement. In this case, since the engaging claw portion 13 has a pointed tip that becomes narrower toward the tip, the engaging claw portion 13 is formed in the engaging hole portion 10.
And is securely engaged.

Further, since the roller raceway surface portion 15 of the bearing race 7 is made to be a convex surface so as to face the crowning shape of the needle roller 6, the needle bearing is used even when the thrust bearing 4 idles and when a load is applied. Since the rollers 6 come into contact with each other on the same circumference, "edge load of the needle roller" can be prevented, and only the entire thrust bearing 4 is rubbed (in the rotation direction of the needle roller 6, the contact between the needle roller 6 and the bearing races 7 and 8). Since the peripheral speed of the needle roller 6 changes depending on the difference of the parts, the bearing retainer 5 holding the needle roller 6 is dragged in the outer peripheral direction and abnormally worn, or the needle roller 6 itself wears). Decrease.

The embodiment has been described above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and the present invention is applicable even if there are design changes and the like without departing from the scope of the present invention. include.

[0021]

As described above, according to the present invention, a large number of needle rollers are provided between bearing members, at least one of which is a rotating body, and which are held by a bearing retainer, and arranged on both sides of these needle rollers. In a thrust bearing mounting structure composed of one and the other bearing races, one bearing race is provided with a check guide that engages with an engaging hole portion of one member, and a roller of the one bearing race is provided. The raceway surface,
Since it is convex so as to face the crowning shape of the needle roller, when the thrust bearing is attached along the surface of the member, the engaging claw of the chuck guide of the bearing race is engaged with the engaging hole. Then, the movement of the bearing race in the circumferential direction can be restricted so that other parts can be attached to prevent bending and breakage of the engaging claw portion.

Further, since the roller raceway surface portion of the bearing race is made to be a convex surface so as to face the crowning shape of the needle roller, the needle roller has the same circumference even when the thrust bearing is idling and when a load is applied. Since the above contact makes it possible to prevent "needle roller edge loading", the rubbing movement of the entire thrust bearing is reduced, and the entire thrust bearing does not cause rubbing movement to cause damage.

Further, a pointed engagement claw portion is formed on the tip portion of the check guide, and the outer peripheral edge portion of one of the bearing races is positioned on both sides of the chuck guide and is formed on the outer peripheral edge portion of the bearing race. By forming a notch that is cut into the inner diameter side of the part, the engaging claw is guided to the engaging hole, and the chuck guide has a longer length due to the notch, giving springiness. Therefore, the chuck guide can be engaged more reliably, and the bending and breakage of the engaging claw portion can be eliminated.

[Brief description of drawings]

FIG. 1 is a sectional view in which a part of a thrust bearing mounting structure according to the present invention is omitted.

FIG. 2 (1) is a front view of a bearing race having the same thrust bearing mounting structure. (2) is a side view of the bearing race. (3) is A of the same bearing race
It is an enlarged view of a part. (4) is an arrow view from the B direction in (3) of FIG. 2.

FIG. 3 is a perspective view showing a mounting state of a bearing race on a rotating body in a conventional thrust bearing mounting structure.

FIG. 4 is a cross-sectional view in which a part of a conventional thrust bearing mounting structure is omitted.

FIG. 5 is an explanatory view of a contact state between a needle roller and a bearing race in a conventional thrust bearing mounting structure.

[Explanation of symbols]

 2, 3 members 4 thrust bearing 5 bearing retainer 6 needle roller 7 bearing race (one bearing race) 8 bearing race (other bearing race) 10 engaging hole 12 check guide 15 roller raceway surface

Claims (3)

[Claims] 1. A multiplicity of needle rollers held between bearing members, at least one of which is a rotor, and one and the other bearing races arranged on both sides of the needle rollers. In the thrust bearing mounting structure configured, one bearing race is provided with a check guide that engages with the engaging hole portion of one member, and the roller raceway surface portion of the one bearing race is formed into the crowning shape of the needle roller. A thrust bearing mounting structure characterized by having a convex surface so as to face the. 2. A checkered engagement claw portion is formed at a tip portion of the check guide, and the outer peripheral edge portion of one of the bearing races is positioned on both sides of the chuck guide, and the outer peripheral edge portion of the bearing race is formed. The thrust bearing mounting structure according to claim 1, wherein a notched portion that is cut toward the inner diameter side of the portion is formed. 3. The thrust bearing mounting structure according to claim 1, wherein one of the bearing races is a pressed product in which the convex shape of the roller raceway surface portion is changed depending on the plate thickness thereof.