JPH10131996A - One-way clutch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a one-way clutch decreasing also the number of part items, having good meshing quality and more improving a function. SOLUTION: A one-way clutch is provided with an outer ring 1, inner ring 2, engaging member 3 arranged in an annular space 4 between these inner/outer rings, and a spring 5 energizing the engaging member in one direction. In a side surface of the outer ring 1 of the one-way clutch, a retainer washer 7 is locked, which is formed with a plurality of protrusion parts 7a, positioned in an annular space 4 in a peripheral direction further with a space therebetween serving as a pocket space arranging the engaging member 3, formed to be bent in an axial direction by a fixed pitch. The protrusion part 7a may be provided by two quantities aside to an external/internal periphery.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-way clutch used in an automatic transmission or the like which is a kind of power transmission mechanism of an automobile or the like, and more particularly to a one-way clutch in which a retainer and a retainer washer are integrated. .

[0002]

2. Description of the Related Art A one-way clutch is used in an automatic transmission mechanism or the like of an automobile to transmit rotational torque only in one direction. For example, as shown in FIG. 6 and FIG. 7, which is a front view taken in the direction of arrow Q in FIG. 6, such a one-way clutch includes an outer ring 1 and an inner ring 2 and an annular space 4 formed between the outer and inner rings. A plurality of engaging members (sprags) 3 arranged at a constant pitch, a retainer 9 for holding the sprags 3, a spring 5 for constantly biasing the sprags 3 toward the lock side;
It is composed of In this case, the spring 5 also has a hole for disposing the sprag 3.

Some one-way clutches use end bearings that receive a radial load as necessary. In the examples shown in FIGS. 6 and 7, the end bearings are not used and one end of the outer race 1 is used. A support portion 1a whose portion extends inward in the diameter is provided, and a bush 6 is fitted between the inner peripheral surface 1b of the support portion 1a and the outer peripheral surface of the inner ring 2. On the opposite side of the support portion 1a, a spring 5 and a retainer 9 are held in the annular space 4, and a retainer washer 11 for restricting their axial movement is provided on the side surface of the outer race 1. Attached to the groove 1f.

[0004]

In the conventional one-way clutch, since the retainer washer and the retainer are separate parts, the number of parts increases and the number of assembling steps increases. Also, if a drag clip or the like is attached to the retainer as a frictional force applying means for improving the response at the time of sudden acceleration / deceleration between the outer ring and the retainer, the number of parts further increases, and the number of assembly steps is increased. Increase. Therefore, in the one-way clutch, it is desired to reduce the number of parts as much as possible to improve maintainability and reduce costs.

The present invention has been made in view of the above-mentioned problem, and has as its object to provide a one-way clutch in which the number of parts is small and the engagement of sprags is further improved.

[0006]

That is, in order to solve the above-mentioned problems, the present invention provides an outer ring, an inner ring, an engaging member disposed in an annular space between these outer and inner rings, and a sprag. A one-way clutch comprising: a spring that biases in one direction; and a retainer washer that is locked to a side surface of an outer ring, wherein the retainer washer has a circumferential portion between the outer ring and the inner ring. It is characterized in that a plurality of protrusions which are located in the annular space and a space between them serves as a pocket space for disposing the engaging member are bent at a constant pitch in the axial direction. The retainer washer is provided with two protrusions on an outer diameter side and an inner diameter side.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a partial longitudinal sectional view of a one-way clutch of the present invention. The one-way clutch includes an outer race 1, an inner race 2, an engagement member (sprag) 3 disposed in an annular space 4 between the outer and inner races,
A spring 5 for urging the sprag 3 in one direction is disposed in a space 8 formed between an inner peripheral surface 1b of a support portion 1a formed on one side of the outer ring 1 and an outer peripheral surface 2a of the inner ring 2. And a retainer washer 7 attached to the side surface 1c of the outer race 1. This Rete
The inner washer 7 is formed by bending a part of the inner diameter side in the axial direction at a constant pitch in the circumferential direction to form a protruding portion 7a and positioning the protruding portion 7a in the annular space 4 between the outer and inner rings. is there.

A housing 10 is provided on the outer diameter side of the outer race 1.
Are formed at several locations in the circumferential direction. On one side of the thick portion 1e of the outer ring 1, a groove 1f is provided in a stepped manner around the claw portion 7 of the retainer washer 7.
c is locked.

FIG. 2 is a partial cross-sectional view of the retainer washer 7 in the axial direction, and FIG. 3 is a front view of FIG.
FIG. 4 is a partial perspective view of the retainer washer 7. In this retainer washer 7, the end 7d of the portion that is bent in the axial direction as the protruding portion 7a on the inner diameter side of the washer 7 is slightly longer and the end 7e of the portion that is not bent is a shorter diameter, that is, The inner ring 2 is punched so as to have a slightly larger diameter than the outer peripheral surface 2a. However, depending on the length of the annular space 4 in the axial direction, the length may be the same or vice versa. Also,
Claws 7c on the outer periphery of the retainer washer 7 are provided at several places in the circumferential direction and are engaged with grooves 1f provided on the side surface of the outer race 1.

A protrusion 7a formed by bending the inner diameter side of the retainer washer 7 at a constant interval (pitch) in the circumferential direction.
7f, 7f,... Formed between the projections 7a and the projections 7a.
Is a pocket for disposing the sprag 3 when the retainer washer 7 is fitted between the outer ring 1 and the inner ring 2. Therefore, the retainer washer 7 functions as a holder for holding the sprag 3.

When the projection 7a of the retainer washer 7 is disposed in the annular space 4 between the outer ring 1 and the inner ring 2 to hold the sprag 3, for example, when the outer ring 1 rotates in a certain direction, Since the retainer washer 7 locked to the outer race 1 also rotates integrally, the meshing property is improved, and the responsiveness during rapid acceleration / deceleration is extremely improved.

FIG. 5 is a perspective view of a modified embodiment of the one-way clutch of the present invention. That is, in this modified embodiment, the inner peripheral side of the retainer washer 7 is bent at regular intervals in the circumferential direction at the inner peripheral side, and the outer peripheral side at three locations (7).
g, 7h, 7i) are punched at a constant interval (pitch) to form two projections, and a projection 7b near the outer periphery bent. Spaces 7f, 7f,... Formed between these protrusions 7a, 7b and the adjacent protrusions 7a, 7b.
Is a pocket for holding the sprag 3. still,
At the time of assembly, a spring (not shown) is disposed between the inner protrusion 7a and the outer protrusion 7b.

Some one-way clutches require two retainers, an outer retainer and an inner retainer. Protruding portions 7a and 7b are formed in a retainer washer 7 shown in FIG. In this case, two cages are not required. Also in this modified embodiment, since the outer race 1 and the retainer washer 7 behave integrally, the meshing property as a one-way clutch is extremely improved.

[0014]

As described in detail above, according to the one-way clutch of the present invention, the retainer washer can have both the function as the retainer and the function as the retainer, thereby reducing the number of parts. Thus, cost can be reduced. Further, since the retainer washer is attached to the outer ring and behaves integrally with the outer ring, the meshing performance of the sprag can be improved.

[Brief description of the drawings]

FIG. 1 is a partial longitudinal sectional view of a one-way clutch of the present invention.

FIG. 2 is a partial sectional view in the axial direction of a retainer washer constituting the one-way clutch of the present invention.

FIG. 3 is a front view as viewed in the direction of arrow P in FIG. 2;

FIG. 4 is a partial perspective view of a retainer washer constituting the one-way clutch of the present invention.

FIG. 5 is a perspective view of a modified embodiment of a retainer washer constituting a one-way clutch of the present invention.

FIG. 6 is a partial longitudinal sectional view of a conventional one-way clutch.

FIG. 7 is a front view as viewed in the direction of arrow Q in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer ring 1a Outer ring support part 1b Outer ring support part inner peripheral surface 1f Outer ring groove 2 Inner ring 2a Inner ring outer peripheral surface 3 Engaging member (sprag) 4 Annular space 5 Spring 6 Bush 7 Retainer washer 7a Projection 7b Projection Part 7c claw part 7f space (pocket)

Claims (2)

[Claims] 1. An outer ring, an inner ring, an engaging member disposed in an annular space between the outer and inner rings, a spring for urging the engaging member in one direction, and locked on a side surface of the outer ring. Rete
A one-way clutch comprising: a retainer, wherein the retainer is disposed in an annular space between the outer ring and the inner ring in a circumferential direction, and a space between the outer ring and the inner ring arranges the engagement member. A one-way clutch, wherein a plurality of protrusions serving as pocket spaces are formed by being bent in the axial direction at a constant pitch. 2. The retainer washer is provided with two raised portions near an outer periphery and an inner periphery.
The one-way clutch according to claim 1.