JPH0725338U - One way clutch - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a one-way clutch having an end bearing retainer capable of preventing the spring load from being adversely affected by high rigidity and preventing the spring portion from being broken. [Structure] At least one of the end bearing retainers 7, 8 attached to both sides of the outer ring 1 has an outer peripheral edge portion of the end bearing retainer 7, and a mounting portion 13 engaged with a mounting groove 10 formed in an outer peripheral portion of the outer ring 1. The spring portion 15 is formed integrally with the radial portion 15a and the spring portion 15 including the circumferential portion 15b that extends in the circumferential direction from the radial portion 15a and that abuts the housing 16 that is spline-fitted with the outer ring 1. A one-way clutch, characterized in that the main body portion 7a of the end bearing retainer 7 in which is formed and the side surface 1a of the outer ring 1 are in contact with each other in a plane substantially orthogonal to the outer ring axis.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a one-way clutch used for a speed change mechanism of an automobile, and more particularly to a one-way clutch having an improved structure for preventing rattling noise.

[0002]

[Prior art]

 Conventionally, as a one-way clutch used for a transmission mechanism of an automobile, as shown in FIGS. 4 to 6, an outer ring 40, an inner ring 41, and a plurality of engaging members (sprags) 42 arranged between the inner ring and the outer ring. And a retainer 43, a spring 44, an end bearing 45, and the like.

The sprag 42 is held by a cage 43 in a space formed by the end bearing rings 45, 45 fitted on both sides between the inner ring 41 and the outer ring 40, and is urged to one side by a spring 44. Are arranged. Further, end bearing pressings 46 and 49 are engaged with both side surfaces of the outer ring 40, and inner diameter portions of the end bearings press the end bearings 45 and 45. A stepped portion 40a is formed on one side surface of the outer ring 40, and a mounting groove 40b for one end bearing retainer 46 is formed in the stepped portion 40a. The protrusions 40d formed around the outer circumference of the outer ring 40 at regular intervals are fitted into the spline recesses 51a formed on the inner wall of the housing 51 so that the outer ring 40 does not rotate. A mounting groove 40c for the other end bearing retainer 49 is formed on the outer peripheral edge of the convex portion 40d on the side where the stepped portion 40a of the outer ring 40 is not formed.

On the outer peripheral portion of the one end bearing retainer 46, a root portion is a radial portion 47 which is a stepped portion 46 a which is fitted into the stepped portion 40 a of the outer ring 40, and a circumferential portion from the radial portion 47. A spring portion 46c having a circumferential portion 48 extending on both sides in the direction and a locking portion 46b fitted into the mounting groove 40b of the outer ring 40 are provided so that the outer ring 40 can be assembled into the outer ring 40 with one touch. The circumferential portion 48 of the spring portion 46c is formed as a flat inclined surface with respect to the outer ring side surface as shown in FIG. Further, the other end bearing retainer 49 is also provided with a locking portion 49a to be fitted into the mounting groove 40b of the outer ring 40, so that it can be incorporated into the outer ring 40 with one touch. In the one-way clutch thus assembled, when the convex portion 40c of the outer ring 40 is fitted into the concave portion 51a of the inner wall of the housing 51 and is fixed in the housing 51 by the snap ring 50, the flange portion 46c of the end bearing retainer 46 is The outer ring 40 is restrained from rolling around when the inner ring 41 changes its rotation direction due to the friction due to the biasing force of the spring part 46c, which is elastically contacted with the side wall 51b of the housing 51. The so-called rattling noise can be prevented. The conventional structure shown in FIGS. 4 to 6 is proposed in Japanese Utility Model Laid-Open No. 4-121536.

[0005]

[Problems to be solved by the device]

 In the one-way clutch described above, since the stepped portion 46a of the end bearing retainer 46 is fitted in the stepped portion 40a of the outer ring 40, the end bearing retainer 46 has high rigidity. In this conventional structure, the radial portion 47 contacts the housing 51 and the circumferential portion 48 contacts the outer ring 40, that is, the stepped portion 46a and the radial portion 47 are inside the stepped portion 40a of the outer ring 40. Since it is in a floating state, it is necessary to give sufficient consideration to the management of the spring load of the spring portion 46c so that the rigidity of the end bearing retainer 46 does not become a problem. If the management of this spring load is not sufficient, it is possible that the spring load will suddenly increase due to the rigidity of the end bearing retainer 46 when the displacement of the spring portion 46c reaches a certain amount. The spring load cannot be obtained. Further, since the circumferential portion 48 of the spring portion 46c of the end bearing retainer 46 is flat, when it is displaced by elastically contacting the side surface of the outer ring 40, the radial portion 47 and the circumferential portion 48 of the spring portion 46c. There is a risk that the area near the joint will bend and the stress will concentrate there, causing breakage. An object of the present invention is to provide a one-way clutch having an end bearing retainer capable of preventing the spring load from being adversely affected by high rigidity and preventing the spring portion from being broken.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides an outer ring that is spline-fitted into a housing, an inner ring, a plurality of engaging members arranged between the outer ring and the inner ring, and a holding member that holds the engaging members. And a spring for urging each of the engaging members in one direction, end bearings arranged on both sides of the outer ring and the inner ring, and end bearing retainers attached to both side surfaces of the outer ring. In the one-way clutch, at least the outer peripheral edge portion of the one end bearing retainer has a mounting portion that engages with a mounting groove formed on the outer peripheral portion of the outer ring, a radial portion, and a radial portion extending from the radial portion in the circumferential direction. The housing and the spring part consisting of the circumferential part that abuts are integrally formed, respectively, and the main body of the end bearing retainer and the outer ring side face where the spring part is formed are substantially orthogonal to the outer ring axis. That it is characterized in that in contact with the plane.

In addition, it is characterized in that a circumferential portion of the spring portion is formed into a curved surface in a direction in which a tip portion is bent back with respect to the housing.

[0008]

[Action]

 On at least one of the end bearing retainers, a spring having a mounting portion that engages with the mounting groove of the outer ring, a radial portion, and a circumferential portion that extends circumferentially from the radial portion and contacts the housing. The part is integrally formed. The main body of the end bearing retainer, in which the spring portion is formed, and the outer ring side surface are in contact with each other in a plane substantially orthogonal to the outer ring axis. By doing so, the spring load is borne by the displacement of only the spring portion regardless of the rigidity of the end bearing pressing, and an appropriate spring load according to the displacement of the spring portion can be obtained.

Further, since the circumferential portion of the spring portion has a curved surface shape in which the tip portion is bent back with respect to the housing, stress is relaxed by deformation of the circumferential portion, and Stress concentration due to bending is unlikely to occur at the joint with the circumferential direction, and breakage of the spring is prevented.

[0010]

【Example】

 Hereinafter, a specific embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, this one-way clutch is arranged between an outer ring 1 having an outer periphery having a protrusion 9 that fits in a spline on a housing 16, an inner ring 2, and the outer ring 1 and the inner ring 2. A plurality of sprags 3, a retainer 4 that holds the sprags 3, a spring 5 that biases the sprags 3 in one direction, and a spring 5 that is arranged on both sides of the outer ring 1 and the inner ring 2. The end bearings 6 and 6 and the end bearing retainers 7 and 8 attached to both side surfaces of the outer ring 1 are basically configured.

The operations of the sprag 3, the retainer 4, the spring 5, and the end bearings 6 and 6 are not directly related to this invention, and since these operations are well known in the art, detailed description thereof will be omitted. .

The projections 9 on the outer peripheral surface of the outer ring 1 are formed at equal intervals (for example, 10 equal parts) on the circumference. The number of the convex portions 9 is arbitrary. Then, concave mounting grooves 10 and 11 are formed at both axially opposite sides of the outer peripheral surface of the convex portion 9. Further, the side surface 1a on the side where the end bearing retainer 7 having the ridge portion 15 to be described later is attached is formed of a flat surface substantially orthogonal to the axis of the outer ring 1.

The outer peripheral edge of each of the end bearing retainers 7, 8 extends in the radial direction corresponding to the convex portion 9 in which the mounting grooves 10, 11 of the outer ring 1 are formed, and extends on the outer peripheral surface of the convex portion 9. Along the axially bent mounting portions 13, 13 are integrally formed. Protrusions 14 and 14 that engage with the mounting grooves 10 and 11 are formed on the mounting portions 13 and 13, respectively.

Next, at the outer peripheral edge portion of the one end bearing retainer 7, the housing 16 is made to project in a direction opposite to the mounting portion 13 corresponding to the convex portion 9 in which the mounting groove 10 is not formed. A substantially T-shaped spring portion 15 that contacts the step portion 18 is integrally formed. The side surface of the main body portion 7a of the end bearing retainer 7 that comes into contact with the outer ring side surface 1a is a plane substantially orthogonal to the axis of the outer ring 1. The spring portion 15 may be integrally press-molded with the main body portion 7a of the end bearing retainer 7, or the separately formed spring portion 15 may be integrally welded to the main body portion 7a. Is also good.

The substantially T-shaped spring portion 15 has the following specific configuration. The main body portion 7a of the end bearing holding member 7 has a cutout portion 12 that is cut out in a constant width in the radial direction and in the circumferential direction, and the main body portion 7 is provided at the circumferential center portion of the peripheral portion of the cutout portion 12. A radial portion 15a extending radially outward is formed at the same axial position as a, and circumferential portions 15b extending circumferentially from both side surfaces of the radial portion 15a are formed. The outer circumference of the circumferential portion 15b has substantially the same diameter as the outer circumference of the main body portion 7a on which the mounting portion is formed. As shown in FIG. 3, the circumferential portion 15b projects in the direction opposite to the mounting portion 13 and has a curved surface shape that is bent toward the step portion 18 of the housing 16 toward the tip. By forming the circumferential portion 15b into a curved shape, the circumferential portion 15b is flexed smoothly when a load is applied, and stress concentration is less likely to occur near the joint between the radial portion 15a and the circumferential portion 15b. Thus, the spring portion 15 is formed of the radial portion 15a and the circumferential portion 15b.

On the other hand, the housing 16 is formed with a spline concave portion 17 into which the convex portion 9 of the outer ring 1 is fitted. The housing 16 is provided with a step portion 18 opposed to the one end bearing press 7 and a snap ring 19 opposed to the other end bearing press 8 is mounted. A snap ring may be attached instead of the step portion 18 to form a part of the housing.

The above-mentioned one-side clutch is assembled as follows. That is, after incorporating the sprag 3, the cage 4, the spring 5, and the end bearings 6 and 6 between the inner ring 2 and the outer ring 1, one side of the outer ring 1, that is, a plane substantially orthogonal to the axis of the outer ring 1. The one end bearing retainer 7 is attached to the side face 1a formed in 1., and the other end bearing retainer 8 is attached to the other side face 1b of the outer ring 1. The end bearing retainers 7 and 8 described above are fixed to the outer ring 1 with one touch by the spring action of the mounting portion 13 and the engagement action of the protrusion 14 with the mounting groove 10. Next, while the outer ring 1 is spline-fitted to the housing 16, the one-side clutch thus assembled is brought into contact with the stepped portion 18 of the housing 16 and the spring portion 15 of the one end bearing retainer 7 to bring out the spring. The snap ring 19 is attached to the housing 16 on the side of the other end bearing retainer 8 while resisting the biasing force of. In this way, the outer ring 1 is pressed against the snap ring 19 by the biasing force of the spring portion 15 of the one end bearing retainer 7, and the assembling is completed.

In this way, the spring portion 15 of the end bearing retainer 7 of the assembled one-clutch is subjected to the biasing force in a state of being dispersed in the circumferential direction, so that there is no rattling due to the inclination of the outer ring 1, On the other hand, the frictional force between the clutch and the housing 16 also restrains the movement of the outer ring 1 around its axis, so that even when the inner ring 2 changes its rotational direction, so-called loose rotation of the outer ring 1 is suppressed, and the housing 16 and the outer ring 1 It is also possible to prevent the rattling noise of the spline teeth between the two.

[0019]

[Effect of device]

 Since the one-way clutch of the present invention has the structure described in detail above, the main body of the end bearing retainer having the spring portion does not have the stepped portion as in the conventional structure and is extended in the radial direction in a plane. Since it is in contact with the side surface of the outer ring, it is only necessary to set the spring load of only the spring portion, the spring load is stabilized, and the spring load according to the displacement of the spring portion can be obtained.

Further, since the circumferential portion of the spring portion is curved so as to bend back to the outer ring side surface, the load can be relieved by deformation of the circumferential portion, and the radial portion and the circumferential portion can be It is possible to prevent breakage due to stress concentration acting on the joint.

[Brief description of drawings]

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

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

FIG. 3 is a side view of an end bearing retainer having a spring portion.

FIG. 4 is an axial sectional view of a conventional one-way clutch.

FIG. 5 is a rear view of a conventional end bearing retainer.

FIG. 6 is a view on arrow S in FIG.

[Explanation of symbols]

 1 Outer ring 2 Inner ring 3 Sprag 4 Cage 5 Spring 6 End bearing 7, 8 End bearing retainer 7a Body part 10 Mounting groove 13 Mounting part 15 Spring part 15a Radial part 15b Circumferential part

Claims (2)

[Scope of utility model registration request] 1. An outer ring spline-fitted to a housing, an inner ring, a plurality of engagement members arranged between the outer ring and the inner ring, a retainer for holding the engagement members, and the above-mentioned engagements. A one-way clutch comprising a spring for urging a member in one direction, end bearings arranged on both sides between the outer ring and the inner ring, and end bearing retainers attached to both side surfaces of the outer ring, at least one of the above The outer peripheral edge portion of the end bearing retainer, the mounting portion engaging with the mounting groove formed in the outer peripheral portion of the outer ring, and the radial portion and the circumferential portion extending in the circumferential direction from the radial portion and abutting the housing. And a spring part that consists of
A one-way clutch, wherein the main body of the end bearing retainer having the spring portion and the outer ring side surface are in contact with each other on a plane substantially orthogonal to the outer ring axis. 2. The one-way clutch according to claim 1, wherein a circumferential portion of the spring portion is formed into a curved surface in a direction in which a tip portion of the spring portion is bent back with respect to the housing.