JPH08226532A - Thrust washer structure of one-way clutch - Google Patents

Abstract

PURPOSE: To provide a thrust washer structure of a one-way clutch which supplies lubricant to a clutch pack section sufficiently and does not cause wear and abnormal sound. CONSTITUTION: In a thrust washer structure 10 of a one-way clutch which comes into slide-contact with an outer race of the one-way clutch to regulate the position of the axial direction of the outer race and has a locking section 5 which is engaged with an adjacent member, a flange section 2 having steps is provided on outer periphery of a washer main body 1 and a collar 3 is provided on inner periphery of the washer main body 1 to form an oil accumulation section of lubricant between the collar 3 and the flange section 2. The locking section 5 is bent in the axial direction and its cross section is formed into circular shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thrust washer structure used for a one-way clutch of an automatic transmission.

[0002]

2. Description of the Related Art A conventional thrust washer structure will be described below.

As a one-way clutch thrust washer structure, for example, there is one disclosed in Japanese Patent Laid-Open No. 63-28956.

As shown in FIGS. 7 and 8, the one-way clutch 12 comprises an outer race 13, an inner race 14, a sprag 15 and the like.
Thrust washer structures 10 are provided on both side surfaces of the. The thrust washer structure 10 includes a ring-shaped washer body 1, and the washer body 1 regulates the axial position of the outer race 13. Further, four bent claws 7 are projectingly provided on the outer periphery of the washer body 1, and the claws 7 are formed in the holes 1 provided in the clutch pack member 16.
7 to position the washer body 1.
Further, one surface of the washer body 1 forms a sliding surface 1a with the outer race 13, and four diametrical grooves 6 for lubricating oil are formed on the sliding surface 1a.

[0005]

However, in the above-mentioned conventional structure, since the groove 6 is only formed on the sliding surface 1a of the washer body 1, the lubricating hole 14a provided in the inner race 14 allows the washer body to pass through. 1 has a problem in that the lubricating oil is not sufficiently supplied to the clutch pack portion 16 arranged outside the No. 1 unit.

Further, as shown in FIG. 9, the washer body 1
The claws 7 are in angular contact with the holes 17 of the clutch pack member 16 and have a large surface pressure, are easily worn, and there is a drawback that the rattling between the claws 7 and the holes 17 is large and abnormal noise is generated. .

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a thrust washer structure in which lubricating oil is sufficiently supplied to the clutch pack portion, wear is small, and abnormal noise is not generated. .

[0008]

In order to achieve this object, the thrust washer structure according to claim 1 of the present invention slidably contacts the outer race of the one-way clutch to regulate the axial position of the outer race. In a thrust washer structure of a one-way clutch having a detent part that is locked to an adjacent member, a flange portion having a step is provided on the outer periphery of the washer body, and a flange is provided on the inner periphery of the washer body. An oil reservoir for the lubricating oil is formed between the bearing and the portion, and the rotation preventing portion of the washer body is bent in the axial direction and has an arc-shaped cross section.

In the thrust washer structure according to the second aspect of the present invention, the washer body according to the first aspect is composed of a press-formed product.

[0010]

According to the structure of claim 1, since the oil sump portion is provided between the flange of the washer body and the flange portion, the lubricating oil is sufficiently supplied from the oil sump portion to the clutch pack portion through the detent portion. It In addition, since the rotation preventing portion of the washer body is arcuate, it is less worn by adjacent members and less noise is generated.

According to the second aspect of the present invention, the thrust washer body is formed by pressing.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The same parts as those shown in the conventional example are designated by the same reference numerals.

One-way clutch 12 of automatic transmission 11
The sprag 15 is incorporated between the inner race 14 and the outer race 13.
Thrust washer structures 10 are provided on both side surfaces of the.

The thrust washer structure 10 includes a washer body 1 made of a ring-shaped disc member, and a flange portion 2 having a step is formed on the outer periphery of the washer body 1 and is perpendicular to the shaft of the flange portion 2. The outer surface 2a contacts an adjacent member such as the disk member 18 to regulate the position of the outer race 13 in the axial direction. An axially bent collar 3 is formed on the inner circumference of the washer body 1, and an oil reservoir 4 for lubricating oil is formed between the flange 3 and the inner circumference of the flange 2. .

Further, at a plurality of locations on the outer circumference of the washer body 1, there are formed anti-rotation portions 5 which are bent in the axial direction and have an arcuate cross-section, and the tip ends of which are holes formed in adjacent members such as the disk member 18. The washer body 1 is inserted into the armature 17 to prevent it from rotating. The notch 8 is provided on both sides of the detent 5, and the flange 2 at this portion is missing. The surface of the disk portion of the washer body 1 forms a sliding surface 1a with the outer race 13, and four sliding oil grooves 6 are formed in the diametrical direction on the sliding surface 1a. There is.

The thrust washer structure 10 of the one-way clutch 12 configured as described above is used in the automatic transmission 1
Lubrication hole 14 provided in the inner race 14 during operation 1
The lubricating oil entered from a is the oil sump 4 of the washer body 1.
After that, it flows in the direction of the arrow and is sufficiently supplied to the clutch pack portion 16.

Further, as shown in FIG. 6, the hole 17 of the adjacent member is formed.
Since the detent portion 5 inserted in the section has an arcuate cross section, it is hard to wear, and the play between the hole 17 and the hole 17 is small, so that abnormal noise is less likely to occur.

[0018]

As described above, according to the present invention of claim 1, the one-way clutch has a one-way clutch which is slidably contacted with the outer race to regulate the axial direction of the outer race and has a detent portion for engaging with an adjacent member. In the thrust washer structure of the clutch, a flange portion having a step is provided on the outer periphery of the washer body, and a flange is provided on the inner periphery of the washer body, and an oil reservoir for lubricating oil is formed between the flange and the flange portion. However, by bending the detent portion of the washer body in the axial direction and forming an arcuate cross section, the amount of lubricating oil supplied from the oil sump of the washer body to the clutch pack portion through the detent portion is increased. To do. In addition, since the detent portion is arcuate, it is possible to realize a one-way clutch thrust washer structure that is less likely to wear with an adjacent member and that produces less noise.

According to the second aspect of the present invention, since the thrust washer body is a press-formed product, it can be manufactured at low cost.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of an automatic transmission having a one-way clutch thrust washer structure according to an embodiment of the present invention.

FIG. 2 is a plan view of the thrust washer structure.

FIG. 3A is a side view of the same. (B) It is sectional drawing which follows the AA line of FIG.

FIG. 4 is an enlarged view of part B in FIG.

5 is an enlarged view of FIG. 2 as viewed from C. FIG.

FIG. 6 is an explanatory view of the action of the rotation stopping portion of the thrust washer structure.

FIG. 7 is a partial cross-sectional view of an automatic transmission including a conventional one-way clutch thrust washer structure.

FIG. 8 is a perspective view of the thrust washer structure.

FIG. 9 is an explanatory view of the action of the rotation stopping portion of the thrust washer structure.

[Explanation of symbols]

 1 Washer body 2 Flange part 3 Tsuba 4 Oil sump part 5 Anti-rotation part 10 Thrust washer structure 12 One-way clutch 13 Outer race 18 Disc member (adjacent member)

Claims (2)

[Claims] 1. A thrust washer structure for a one-way clutch, which has a detent portion that engages with an adjacent member while slidingly contacting an outer race of the one-way clutch to regulate the axial position of the outer race. A stepped flange portion is provided, and a flange is provided on the inner circumference of the washer body, and an oil reservoir for lubricating oil is formed between the flange and the flange portion. A one-way clutch thrust washer structure characterized in that it is bent into a curved shape and has an arc-shaped cross section. 2. The thrust washer structure for a one-way clutch according to claim 1, wherein the washer body is a press-molded product.