JPH04121536U - one way clutch - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a one-way clutch with a rattling sound prevention structure that does not require a spring as a separate component and does not cause wear of the end bearing. [Structure] A spring portion 21 is mostly housed in a space formed by a stepped portion 30 formed on an outer ring 15 at an outer peripheral edge of an end bearing retainer 21, and has a radial portion and a circumferential portion.
c is integrally formed. Then, the outer ring 15 is assembled into the housing 23 so that the outer ring 15 is pressed against the snap ring 24 by the spring force of the spring portion 21c of the end bearing presser 21. Therefore, the one-way clutch does not rotate when it is idling, and rattling noise is eliminated. Therefore, it is possible to provide a rattling noise prevention structure that does not require a spring as a separate component and does not cause wear of the end bearing 20.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a one-way clutch with an improved structure that prevents rattling noise. Ru.

0002

[Conventional technology]

Traditionally, one-way clutches have been used, for example, in automatic transmissions of automobiles. There is. As shown in Fig. 5, such a one-way clutch has a The outer ring 2 and the inner ring 3 are spline-fitted, and the ring is arranged between the inner ring 3 and the outer ring 2. a plurality of engaging members 4, a retainer 5 that holds each of the engaging members 4, and each of the above-mentioned engaging parts. A spring 6 that biases the material 4 in one direction, and a spring 6 disposed on both sides between the inner ring 3 and the outer ring 2 End bearings 7, 7 and end bearings attached to both sides of the outer ring 2 A device equipped with a presser foot 8,8 has been proposed (see Japanese Patent Application Laid-open No. 1-307525). see).

0003 Then, attach a pair of snap rings 9, 9 to the housing 1, and attach one snap ring to the housing 1. The outer ring 2 is attached to the other snap ring 9 by a disc spring 10 placed between the snap ring 9 and the snap ring 9. By pressing, the movement of the outer ring 2 around the axis is restrained, and the inner ring 3 rotates in the direction of rotation. This suppresses the rotation of the outer ring 2 when the outer ring 2 is changed, and the convex part of the housing 1 is connected to the convex part of the outer ring 2 ( This prevents the rattling sound that occurs when the teeth are struck. However, since the large disc spring 10 is required as a separate component, it is difficult to assemble and reduce the cost. There was a problem with the surface.

0004 Therefore, as a one-way clutch, the housing 1 and the outer By inserting a wave spring 11 between the outer ring 2 and the outer ring 2, the movement of the outer ring 2 is restrained. There is something I did.

[0005]

[Problem that the idea aims to solve]

However, even with such a one-way clutch, there is a wave as a separate component. In addition, when fitting the outer ring 2 into the housing 1, a wave spring 11 is required. Depending on the rigidity of the spring 11, the spring 11 may not easily bend and may be difficult to assemble. There was something that happened. Furthermore, the spring force of the wave spring 11 causes the hollow outer ring 2 to move in the radial direction. There was a problem in that the end bearings 7, 7 were worn out due to being pressed against them.

[0006] Therefore, the purpose of this invention is to eliminate the need for a spring as a separate component, and to eliminate the need for an end bearing. We provide a one-way clutch with a structure that prevents rattling noise and does not cause tooth wear. It's about doing.

[0007]

[Means to solve the problem]

In order to achieve the above object, the present invention has a convex part that is spline-fitted to the housing. An outer ring having a concave portion on the outer periphery, an inner ring, and a plurality of rings arranged between the inner ring and the outer ring. An engaging member, a retainer that holds each of the engaging members, and each of the engaging members that are attached in one direction. a spring that acts, an end bearing placed on both sides between the inner ring and outer ring, and an upper A one-way club equipped with an end bearing retainer that is attached to both sides of the outer ring. In this case, the outer ring has an axially thick inner peripheral part and an axially thin outer peripheral part. A stepped portion having a mounting groove on the outer periphery is formed, and at least one of the above-mentioned engines is The bearing retainer has a mounting part on the outer periphery that engages in the mounting groove of the stepped part in the axial direction. , and a spring portion that is at least partially accommodated in the space formed by the stepped portion. The spring portion includes a radial portion and a circumferential portion extending circumferentially from the radial portion. It is characterized by having the following.

[0008]

[Effect]

An engaging member, retainer, spring, and end bearing are assembled between the inner ring and outer ring. After that, apply each end bearing retainer to both sides of the outer ring from both sides in the axial direction. Assemble by engaging both sides of the outer ring from the axial direction.

[0009] At this time, the attachment part of at least one end bearing holder should be attached to the stepped part of the outer ring. In addition to engaging the groove from the axial direction, the spring portion of the end bearing holder is A portion of each is accommodated in the space formed by the step portion.

0010 Then, while spline-fitting the outer ring to the housing, or snap ring) and press the spring part of the end bearing holder above into contact with the The outer ring is pressed against the housing by the spring force of the spring part of the end bearing holder. Assemble the outer ring into the housing.

[0011] By doing this, the spring part presses the one-way clutch in the axial direction. This eliminates the slippage when the one-way clutch is idling, and no rattling noise occurs. It becomes. Also, the conventional springs (disc springs and wave springs) as separate parts are no longer required. Therefore, the number of parts can be reduced and costs can be reduced. In addition, the spring part allows the outer ring to is pressed in the axial direction, so the outer ring is not pressed in the radial direction like in conventional wave springs. There is no risk of wear on the end bearings. Also, the above spring part By protruding outward in the radial direction and bending it, a large deflection and large spring force can be generated. can get.

0012 Also, since the space formed by the stepped portion is wider in the circumferential direction than in the axial or radial direction, The circumferential portion of the spring portion extending in the circumferential direction makes the most of the space. Not only can you easily create a spring shape, but you can also control the setting range of the spring force of the spring part. It can be made wider so that the spring section has optimum spring properties.

[0013]

【Example】

Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments. As shown in Figures 1 and 2 The one-way clutch includes an outer ring 15, an inner ring 16, an engaging member 17, a retainer 18, Spring 19, a pair of end bearings 20, 20, and a pair of end bearing holders It basically consists of 21 and 22.

[0014] FIG. 4 is a detailed view of the end bearing retainer 21 of the one-way clutch shown in FIG. It is. Moreover, the AA cross section in FIG. 2 of the one-way clutch of FIG. 3 is shown.

[0015] The outer ring 15 is composed of an axially thick inner peripheral part and an axially thin outer peripheral part. A stepped portion 30 having a mounting groove 15b on the outer periphery is formed. Outside of the above outer ring 15 Convex portions 15a, . . . , 15a are formed on the circumference of the circumferential surface. Outside this convex portion 15a A concave mounting groove 15c is formed on one side of the circumferential surface in the axial direction. Above inner ring 16 At the center position between the outer ring 15 and the outer ring 15, there are a plurality of engaging members 17 and each engaging member 17. a retainer 18 that holds the retainer 18, and a spring 19 that biases each engaging member 17 in one direction. At the same time, end bearing rings are provided at both sides between the inner ring 16 and the outer ring 15. 20, 20 are arranged.

[0016] Note that the actions of the engaging member 17, retainer 18, spring 19, and end bearing 20 etc. are well known and have no direct relation to the present invention, so detailed explanations will be omitted.

[0017] On the other hand, the end bearing presser 22 has an outer peripheral edge that is connected to each convex portion 1 of the outer ring 15. It is set to have approximately the same diameter as the outer peripheral surface of the recess 15d between 5a, and the above-mentioned mounting It extends in the radial direction corresponding to the convex portion 15a in which the groove 15c is formed, and extends on the outer peripheral surface of the convex portion 15a. A mounting portion 22a bent in the axial direction is integrally formed therewith. This mounting part 22a A protrusion 22b that engages with the mounting groove 15c of the protrusion 15a is formed on the protrusion 22b.

[0018] Further, the end bearing presser 21 has an outer peripheral edge that is a stepped portion of the outer ring 15. It is set to have approximately the same diameter as the outer circumferential surface of 30, and this outer circumferential edge is provided with a groove corresponding to the stepped portion 30. The mounting portion 21a extends in the radial direction and is bent in the axial direction along the outer peripheral surface of the stepped portion 30. It is integrally formed.

[0019] This mounting portion 21a engages with a mounting groove 15b formed on the outer periphery of the stepped portion 30. A protrusion 21b is formed. In addition, the outer peripheral edge of the end bearing presser 21 The section includes a T-shaped case that is almost entirely accommodated in the space formed by the step section 30. A threaded portion 21c is integrally formed. This spring portion 21c is as shown in FIGS. It has a radial part 100 and a circumferential part 200 extending in the circumferential direction from the radial part 100. do.

[0020] In other words, as shown in FIG. , the mounting part 21a and the spring part 21c are integrally formed alternately, and the other end bearing presser A mounting portion 22a corresponding to the convex portion 15a of the outer ring 15 is integrally formed on the outer peripheral edge of the outer ring 15. This means that it has been done.

[0021] On the other hand, the housing 23 has a spline to which the convex portion 15a of the outer ring 15 fits. A recess 23a is formed. The housing 23 includes one side of the outer ring 15. A stepped portion 23b is formed opposite to the end bearing retainer 21 of the other end bearing. A snap ring 24 facing the ring presser 22 is attached. In addition, the top A snap ring may be installed in place of the marking part 23b, and in this case, the snap ring The ring is made part of the housing.

[0022] According to the above configuration, the engaging member 17 and the retainer 18 are disposed between the inner ring 16 and the outer ring 15. After assembling the spring 19 and end bearings 20, 20, each While applying the end bearing retainers 21 and 22 from both sides in the axial direction, In addition, the mounting groove 15b on the outer periphery of the stepped portion 30 of the outer ring 15 and the convexity of the spline of the outer ring 15 The mounting part 21a of the end bearing retainer 21 and the end are attached to the mounting groove 15c of the part 15a. The mounting portion 22a of the bearing presser 22 is engaged. This allows the end bearing The presser feet 21 and 22 have spring action on the mounting parts 21a and 22a and mounting on the protrusions 21b and 22b. It is fixed to the outer ring 15 by engaging the grooves 15b and 15c.

[0023] In addition, the end bearing retainers 21 and 22 can be removed by removing the mounting parts 21a and 22a. Simply fit into the outer circumferential surface of the stepped portion 30 of the ring 15 and the outer circumferential surface of the convex portion 15a of the outer ring 15. It can be fixed with one touch and has good assembly.

[0024] Then, while spline fitting the outer ring 15 to the housing 23, The spring portion 21c of one end bearing holder 21 is brought into contact with the stepped portion 23b of the 23. , while resisting the spring force, slide it onto the housing 23 on the other end bearing retainer 22 side. Install nap ring 24. This allows the snap ring 24 to be attached to one end. The spring force of the spring portion 21c of the bearing retainer 21 causes the outer ring 15 (the other end bearing The mounting presser foot 22) is pressed to complete the assembly. When incorporating this, The spring part 21c allows you to easily determine the installation direction, so the installation direction can be easily determined. Differences are unlikely to occur. Also, after installing, one end bearing retainer 21 The outer ring 15 (the other end bearing retainer 22) is is pressed against the snap ring 24, so the built-in space of the housing 23 is Since the dimensional tolerance of the space S can be set large, machining is easy and the axial direction There will be no tapping. In addition, the spring portion 21c is housed in the space formed by the stepped portion 30. Therefore, the axial dimension becomes smaller. Further, the space formed by the step portion 30 is axially Since it is wider in the circumferential direction than in the direction and radial direction, the circumferential direction of the spring portion 21c extending in the circumferential direction is The facing part 200 makes it possible to make the most of the space and easily create a spring shape. In addition, the circumferential portion 200 allows setting of the spring force of the spring portion 21c. The range can be widened, and the spring portion can have optimal spring characteristics.

[0025] Furthermore, due to the spring force, there is no wobbling caused by the tilting of the outer ring 15, and Due to the frictional force between the one-way clutch and the housing 23 due to the spring force, the outer ring Since the movement around the axis of 15 is also restricted, if the inner ring 16 changes its rotation direction to the idling direction, The rotation of the outer ring 15 is suppressed, and the recess 23a of the housing 23 is aligned with the outer ring 15. It is possible to prevent the rattling sound caused by hitting the convex portion 15a.

[0026]

[Effect of the idea]

As is clear from the above explanation, the one-way clutch of the present invention has a thickness in the axial direction. It consists of a thick inner periphery and an axially thin outer periphery, and has a stepped part with a mounting groove on the outer periphery. At least one of the end bearing holders attached to both sides of the formed outer ring The outer peripheral edge of the end bearing retainer engages in the mounting groove of the step above in the axial direction. At least a portion is accommodated in the space formed by the mounting portion and the stepped portion, and the radial direction A spring portion having a circumferential portion and a circumferential portion is provided, and the spring force of this spring portion causes the outer ring to move slightly in the axial direction. It is designed to be pressed from at least one side.

[0027] Therefore, according to the present invention, at least one end bearing retainer is It can be fixed to the outer ring with one touch by simply fitting the attachment part into the outer ring's mounting groove from the axial direction. , the ease of assembly is improved. Also, the spring part of at least one end bearing retainer The outer ring is pressed against the housing from at least one axial side by the axial spring force of Because of this, it is possible to set large dimensional tolerances for the housing's built-in space. Machining becomes easier and axial play is also eliminated. Furthermore, the above spring force This eliminates rattling caused by the tilting of the outer ring. Moreover, the spring force described above makes it possible to Is the movement of the outer ring around the axis restricted due to the frictional force between the clutch and the housing? This suppresses the rotation of the outer ring when the inner ring changes its direction of rotation to the idling direction, and improves the housing. It is possible to prevent rattling noise caused by the concave part of the ring being struck by the convex part of the outer ring.

[0028]Furthermore, since a spring (a disc spring or a wave spring) as a separate component as in the past is not required, the number of parts can be reduced and costs can be reduced.

[0029] Also, since the space formed by the stepped portion is wider in the circumferential direction than in the axial or radial direction, The circumferential portion of the spring portion extending in the circumferential direction makes the most of the space. Not only can you easily create a spring shape, but you can also control the setting range of the spring force of the spring part. It can be made wider so that the spring section has optimum spring characteristics.

[0030] Also, since the spring part presses the outer ring in the axial direction, it does not work like a conventional wave spring. The outer ring is not pressed in the radial direction and the end bearing may wear out. do not have.

[0031] In addition, the spring part of the end bearing retainer has a space created by making the outer ring thinner. , the axial dimension becomes smaller.

[Brief explanation of 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 the end bearing holder of the one-way clutch.

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

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

[Explanation of symbols]

15 Outer ring 15a Convex part 15b, 15c mounting groove 15d recess 16 Inner circle 17 Engagement member 18 Cage 19 Spring 20 End bearing 21,22 End bearing holder 21a, 22a mounting part 21c Spring part 23 Housing 30 Step part 100 Radial section 200 Circumferential part

Claims (1)

[Scope of utility model registration request] 1. An outer ring having a convex portion and a recessed portion on the outer periphery that are spline-fitted to the housing, an inner ring, a plurality of engaging members disposed between the inner ring and the outer ring, and holding each of the engaging members. a spring that biases each of the engaging members in one direction, end bearings disposed on both sides between the inner ring and outer ring, and end bearing holders attached to both sides of the outer ring. In the one-way clutch, the outer ring is composed of an axially thick inner peripheral part and an axially thin outer peripheral part, and a step part having a mounting groove is formed on the outer periphery, and at least one of the end bearing retainers is formed on the outer ring. A mounting portion that engages in the mounting groove of the stepped portion in the axial direction and a spring portion that is at least partially accommodated in the space formed by the stepped portion are integrally formed on the outer peripheral edge of the spring portion. A one-way clutch comprising a radial portion and a circumferential portion extending circumferentially from the radial portion.