JP2525073Y2 - One-way clutch - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention particularly relates to a one-way clutch having an improved structure for preventing rattle noise.

[0002]

2. Description of the Related Art Conventionally, one-way clutches have been used in, for example, automatic transmissions of automobiles. As shown in FIG. 5, such a one-way clutch includes an outer ring 2, which is spline-fitted to a housing 1, an inner ring 3, and a plurality of engaging members 4 arranged between the inner ring 3 and the outer ring 2.
A retainer 5 for holding each of the engagement members 4; a spring 6 for urging each of the engagement members 4 in one direction; and end bearings 7 disposed on both sides between the inner ring 3 and the outer ring 2. , 7
And end bearing retainers 8, 8 attached to both side surfaces of the outer ring 2 have been proposed (Japanese Patent Laid-Open No.
307525).

[0003] A pair of snap rings 9, 9 is attached to the housing 1, and the outer ring 2 is pressed against the other snap ring 9 by a disc spring 10 disposed between the pair of snap rings 9, and thereby the outer ring 2 is formed. By restricting the movement around the axis, the rotation of the outer ring 2 when the inner ring 3 changes the rotation direction is suppressed, and the convex portion of the housing 1 becomes the convex portion (teeth) of the outer ring 2.
It is designed to prevent the rattling noise generated by hitting. However, since a large disc spring 10 is required as a separate component, there are problems in terms of cost and assembly.

For this reason, as shown in FIG. 6, there is a one-way clutch in which a wave spring 11 is inserted between the housing 1 and the outer ring 2 so as to restrict the movement of the outer ring 2.

[0005]

However, such a one-way clutch also requires a wave spring 11 as a separate component, and the rigidity of the wave spring 11 when fitting the outer ring 2 into the housing 1 is also required. In some cases, there is a problem that the spring 11 does not easily bend and is difficult to assemble. Further, there is a problem that the hollow outer ring 2 is pressed in the radial direction by the spring force of the wave spring 11, and the end bearings 7, 7 are worn.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a one-way clutch which does not require a spring as a separate part and has a rattling noise preventing structure which does not cause end bearing wear.

[0007]

In order to achieve the above object, the present invention provides an outer ring having a projection and a recess on the outer periphery, which are spline-fitted to a housing, an inner ring, and an outer ring between the inner ring and the outer ring. A plurality of engaging members, a retainer for holding the engaging members, a spring for urging the engaging members in one direction, and end bearings disposed on both sides between the inner ring and the outer ring. A one-way clutch comprising end bearing retainers mounted on both side surfaces of the outer ring, wherein the outer ring comprises an axially thick inner peripheral portion, and an axially thin outer peripheral portion, and a mounting groove on the outer periphery. A step having at least one of the end bearing retainers is provided at an outer peripheral edge thereof with a mounting portion axially engaging with a mounting groove of the step, and at least a part of a space formed by the step. The spring part in which is stored There has been characterized as having an integrally formed, the spring portion and the radial portion, the circumferential portion extending from the radial portion in the circumferential direction.

[0008]

After assembling the engaging member, the retainer, the spring, and the end bearing between the inner ring and the outer ring, the end bearing retainers are applied to both sides of the outer ring from both sides in the axial direction. Assemble with both sides engaged from the axial direction.

At this time, the mounting portion of at least one end bearing retainer is axially engaged with the mounting groove of the step portion of the outer race, and at least a part of the spring portion of the end bearing retainer is formed by the step portion. Housed in a space.

Then, while the outer ring is spline-fitted to the housing, the spring portion of the end bearing press is brought into contact with the step (or snap ring) of the housing,
The outer ring is incorporated into the housing so that the outer ring is pressed against the housing by the spring force of the spring portion of the end bearing retainer.

With this arrangement, since the spring portion presses the one-way clutch in the axial direction, the one-way clutch is prevented from rotating when idling and no rattling noise is generated. Also, the spring as a separate part
(Belleville spring or wave spring) is not required, so the number of parts can be reduced and cost can be reduced. Further, since the outer ring is pressed in the axial direction by the spring portion, the outer ring is not pressed in the radial direction unlike the conventional wave spring, and the end bearing is not worn. Further, if the spring portion is made to protrude outward in the radial direction and is bent, a large deflection and a large spring force can be obtained.

Further, since the space formed by the step portion is wider in the circumferential direction than in the axial or radial direction, the spring shape is maximized by the circumferential portion of the spring portion extending in the circumferential direction to make full use of the space. The spring portion can be easily created, and the setting range of the spring force of the spring portion can be widened, so that the spring portion has optimal spring characteristics.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. As shown in FIGS. 1 and 2, the one-way clutch includes an outer ring 15, an inner ring 16, an engagement member 17, and a cage 1.
8, a spring 19, a pair of end bearings 20, 20, and a pair of end bearing pressers 21, 22.

FIG. 4 is a detailed view of the end bearing presser 21 of the one-way clutch shown in FIG. FIG.
2 shows an AA cross section of the one-way clutch shown in FIG.

The outer race 15 has an axially thick inner peripheral portion and an axially thin outer peripheral portion, and is formed with a step portion 30 having a mounting groove 15b on the outer periphery. Outer ring 1
, 15a are formed on the circumference of the outer peripheral surface of 5. A concave mounting groove 15c is formed on one side in the axial direction of the outer peripheral surface of the convex portion 15a. Inner ring 1
In the central position between the outer ring 15 and the outer ring 15, a plurality of engaging members 1
7, a retainer 18 for holding each of the engaging members 17, and a spring 19 for urging each of the engaging members 17 in one direction, and both sides between the inner ring 16 and the outer ring 15. End bearings 20, 20 are arranged at the positions.

The engaging member 17, the retainer 18, the spring 1
The operation and the like of the end bearing 9 and the end bearing 20 are well known, and have no direct relation to the present invention, so that the detailed description is omitted.

On the other hand, the end bearing retainer 22 is
The outer peripheral edge portion is a concave portion 15 d between the convex portions 15 a of the outer ring 15.
The outer peripheral surface is set to have substantially the same diameter as the outer peripheral surface, and the outer peripheral edge portion extends in the radial direction corresponding to the convex portion 15a in which the mounting groove 15c is formed, and extends axially along the outer peripheral surface of the convex portion 15a. A bent attachment part 22a is integrally formed. The mounting portion 22a has a projection 22 which engages with the mounting groove 15c of the projection 15a.
b is formed.

The end bearing retainer 21 is
The outer peripheral edge is set to have substantially the same diameter as the outer peripheral surface of the step portion 30 of the outer ring 15. The outer peripheral edge portion extends in the radial direction corresponding to the step portion 30, and has an outer peripheral surface of the step portion 30. Is integrally formed with the mounting portion 21a bent in the axial direction.

The mounting portion 21a has a projection 21b which engages with the mounting groove 15b formed on the outer periphery of the step portion 30. Further, a T-shaped spring portion 21c that is substantially entirely accommodated in the space formed by the step portion 30 is integrally formed on the outer peripheral edge portion of the end bearing presser 21. As shown in FIGS. 4B and 4C, the spring portion 21c has a radial portion 100 and a circumferential portion 200 extending from the radial portion 100 in the circumferential direction.

That is, one end bearing presser 21
As shown in FIG. 2, mounting portions 21 a and spring portions 21 c are alternately and integrally formed on the outer peripheral edge of the outer ring 15, and the outer peripheral edge of the other end bearing presser 22 corresponds to the convex portion 15 a of the outer ring 15. The mounting portion 22a is formed integrally.

On the other hand, the housing 23 has the outer ring 15
Is formed with a spline recess 23a into which the projection 15a is fitted. The housing 23 has a stepped portion 23b facing the one end bearing presser 21 of the outer race 15 and a snap ring 24 facing the other end bearing presser 22 is attached. It should be noted that a snap ring may be attached instead of the step portion 23b. In this case, the snap ring is a part of the housing.

According to the above configuration, after the engaging member 17, the retainer 18, the spring 19, and the end bearings 20, 20 are assembled between the inner ring 16 and the outer ring 15, each end is attached to both sides of the outer ring 15. While applying the bearing pressers 21 and 22 from both sides in the axial direction, the mounting portion 21a of the end bearing presser 21 is fitted into the mounting groove 15b on the outer periphery of the step portion 30 of the outer ring 15 and the mounting groove 15c of the projection 15a of the spline of the outer ring 15. And mounting portion 22a of end bearing retainer 22
Is engaged. Thereby, the end bearing presser 2
1, 22 are the spring action of the mounting portions 21a, 22a and the protrusion 21.
The outer ring 1 is formed by the engagement of the b, 22b with the mounting grooves 15b, 15c.
Fixed to 5.

Further, the end bearing pressers 21 and 2
No. 2 can be fixed by one-touch simply by fitting the mounting portions 21a and 22a to the outer peripheral surface of the step portion 30 of the outer ring 15 and the outer peripheral surface of the convex portion 15a of the outer ring 15, and the assembling property is good.

Then, while the outer ring 15 is spline-fitted to the housing 23, the spring portion 21c of one end bearing presser 21 is brought into contact with the step 23b of the housing 23, and the other end bearing is pressed against the spring force. The snap ring 24 is attached to the housing 23 on the presser 22 side. As a result, the outer ring 15 (the other end bearing presser 22) is pressed against the snap ring 24 by the spring force of the spring portion 21c of the one end bearing presser 21, and the assembly is completed. At the time of this assembling, the assembling direction can be easily determined by the spring portion 21c. After the assembly, the outer ring 15 (the other end bearing retainer 22) is pressed against the snap ring 24 by the axial spring force of the spring portion 21c of the one end bearing retainer 21, so that the space S for the housing Since the dimensional tolerance can be set large, machining is easy, and there is no backlash in the axial direction. Further, since the spring portion 21c is accommodated in the space formed by the step portion 30, the axial dimension is reduced. Further, since the space formed by the step portion 30 is wider in the circumferential direction than in the axial direction and the radial direction, the circumferential portion 200 of the spring portion 21c extending in the circumferential direction maximizes the space to form a spring. Can be easily produced, and the circumferential portion 200 allows the spring portion 2 to be formed.
The setting range of the spring force of 1c can be widened, and the above-mentioned spring portion can have optimal spring characteristics.

Further, due to the above-mentioned spring force, there is no backlash due to the inclination of the outer ring 15, and further, due to the friction force between the one-way clutch and the housing 23 due to the above-mentioned spring force,
Since the movement of the outer ring 15 around the axis is also restricted, the twisting of the outer ring 15 when the inner ring 16 changes the rotation direction to the idling direction is suppressed, and the concave portion 23 a of the housing 23 is hit against the convex portion 15 a of the outer ring 15. The generation of rattling noise can be prevented.

[0026]

As is apparent from the above description, the one-way clutch of the present invention has an axially thick inner peripheral portion and an axially thin outer peripheral portion, and has a step having a mounting groove on the outer periphery. The end bearing retainer attached to both side surfaces of the outer ring having the portion formed therein has an outer peripheral edge portion of at least one end bearing retainer, and a mounting portion axially engaging with the mounting groove of the step portion; At least a part is accommodated in the space formed, and a spring portion having a radial portion and a circumferential portion is provided, and the outer ring is pressed from at least one side in the axial direction by the spring force of the spring portion. .

Therefore, according to the present invention, at least one of the end bearing retainers can be fixed to the outer ring with one touch simply by fitting the mounting portion into the mounting groove of the outer ring from the axial direction, thereby improving the assembling property. In addition, the outer ring is pressed against the housing from at least one side in the axial direction by the axial spring force of the spring portion of at least one end bearing retainer, so that the dimensional tolerance of the housing installation space can be set large, so that processing is easy. At the same time, there is no backlash in the axial direction. Furthermore, the spring force eliminates rattling due to the inclination of the outer ring. Moreover, the frictional force between the one-way clutch and the housing due to the spring force also restricts the movement of the outer ring around the axis, so that the rotation of the outer ring when the inner ring changes the rotation direction to the idling direction is suppressed, and the recess of the housing is reduced. It is possible to prevent the rattling noise generated by hitting the convex portion of the outer ring.

Further, since a separate spring (a disc spring or a wave spring) as a conventional component is not required, the number of components can be reduced and the cost can be reduced.

Further, since the space formed by the step portion is wider in the circumferential direction than the axial or radial direction, the circumferential shape of the spring portion extending in the circumferential direction maximizes the space to form the spring shape. The spring portion can be easily created, and the setting range of the spring force of the spring portion can be widened, so that the spring portion has optimal spring characteristics.

Since the outer ring is pressed in the axial direction by the spring portion, the outer ring is not pressed in the radial direction unlike the conventional wave spring, and the end bearing is not worn.

The spring portion of the end bearing presser is
Since the outer ring is arranged in a space created by making the outer ring thin, the axial dimension is reduced.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a one-way clutch according to an embodiment of the present invention.

FIG. 2 is a front view of the one-way clutch.

FIG. 3 is a sectional view of the one-way clutch.

FIG. 4 is a front view of an end bearing presser of the one-way clutch.

FIG. 5 is a sectional view of a conventional one-way clutch.

FIG. 6 is a front view of a main part of a conventional one-way clutch.

[Explanation of symbols]

 Reference Signs List 15 outer ring 15a convex part 15b, 15c mounting groove 15d concave part 16 inner ring 17 engaging member 18 retainer 19 spring 20 end bearing 21, 22, end bearing presser 21a, 22a mounting part 21c spring part 23 housing 30 step part 100 radial part 200 Circumferential part

Claims (1)

(57) [Scope of request for utility model registration] 1. An outer ring having a convex portion and a concave portion on its outer periphery that are spline-fitted to a housing, an inner ring, a plurality of engaging members disposed between the inner ring and the outer ring, and holding the respective engaging members. And a spring for urging the engaging members in one direction, end bearings disposed on both sides between the inner ring and the outer ring, and end bearing retainers attached to both side surfaces of the outer ring. In the one-way clutch, the outer ring has an axially thick inner peripheral portion and an axially thin outer peripheral portion, and a stepped portion having a mounting groove on an outer periphery is formed, and at least one of the end bearing pressers is provided. The outer peripheral edge is formed integrally with a mounting portion axially engaged with the mounting groove of the step portion and a spring portion at least partially housed in a space formed by the step portion. Is the radial part and its radial direction A one-way clutch having a circumferential portion extending circumferentially from a facing portion.