JP3508003B2 - One-way clutch - Google Patents

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 for an automatic transmission mechanism of an automobile, a torque converter and the like.

[0002]

2. Description of the Related Art Conventionally, as a one-way clutch used in, for example, a torque converter of an automobile, as shown in FIG. 3, an outer ring 30, an inner ring 31, and an inner ring 31, which are press-fitted and fixed to a stator 36 by spline fitting or the like. , A plurality of sprags 32 arranged between the outer rings 31, 30 and the sprags 32.
An outer retainer 33 and an inner retainer 34 for holding the spring, a spring 35 for urging the sprag 32 in one direction, and a spring 35 arranged on one side of the outer ring 30 and fixed to the stator 36 by appropriate means (not shown) such as caulking. Annular retainer 3 described later
It is composed of 7 etc.

On one side of the outer ring 30, the annular retainer 37 having an outer diameter larger than the inner diameter of the outer ring 30 and an inner diameter smaller than the outer diameter of the inner ring 31 is provided.
They are arranged so as to close the space between 1 and 30. The annular retainer 37 rotates relative to the fixed inner ring 31 and may move in the axial direction due to an axial load, so that the outer surface of the annular retainer 37 is in contact with a torque converter fixing portion (not shown) in a thrust needle bearing. Hold 45.

Stepped portions 38 and 39 are formed on the outer peripheral portion and the inner peripheral portion of the inner side surface 37a of the annular retainer 37, and the end portions of the outer race 30 and the inner race 31 are loosely fitted to each other. As a result, the inner side surface 37a of the annular retainer 37 is located in the space between the inner and outer rings 31, 30. An annular retainer 40 integrally formed as a part of the stator 36 closes between the inner and outer races 30 and 31 on the opposite side where the retainer 37 is arranged. The inner diameter of the annular retainer 40 is smaller than the outer diameter of the inner ring. Further, a stepped portion 41 is formed on the inner peripheral portion of the inner side surface 40a of the annular retainer, and the end portion of the inner ring 31 is loosely fitted.

On the inner peripheral surface of the inner ring 31, there is formed a spline 44 which fits into a spline 43 formed on a cylindrical fixed shaft 42.

[0006]

By the way, the one-way clutch used in this torque converter or the like has an inner ring 31.
Although the spline 44 will be formed on the inner peripheral surface of
Since the inner ring 31 is made of metal such as bearing steel or carbon steel, the number of processing steps for the spline 44 is large. Further, the number of steps for assembling each component of the one-way clutch to the housing such as the stator 36 is large. An object of the present invention is to provide a one-way clutch that can reduce the man-hours for processing the inner ring of the one-way clutch and the man-hours for assembling each part of the one-way clutch to the housing.

[0007]

To achieve the above object, the present invention provides an outer ring fitted to a housing member, an inner ring, and a plurality of engaging members arranged between the outer ring and the inner ring. A retainer for holding the engagement member, a spring for urging the engagement members in one direction, and annular members arranged on both sides of the outer ring so as to close the space between the inner and outer rings. In the directional clutch, the inner ring is made of metal and the one annular member is made of synthetic resin,
The inner ring and the annular member are integrally molded. Further, the inner peripheral portion of the synthetic resin annular member is formed into a cylindrical portion extending in the axial direction, and the inner ring is integrally formed on the outer peripheral portion of the cylindrical portion. Furthermore, a spline that fits with a spline shaft is formed on the inner peripheral surface of the tubular portion of the annular member, and at least one of the joint surfaces between the tubular portion of the annular member and the inner ring is provided with a rotation stopping means. It is characterized by

[0008]

Since the metal inner ring of the one-way clutch and the synthetic resin annular member are integrally molded, the assembly can be easily handled. Further, by forming the spline for fitting with the spline shaft integrally with the tubular portion of the synthetic resin annular member at the time of resin molding, the number of man-hours for processing the inner ring can be reduced. Furthermore, since the anti-rotation means is arranged on the joint surface between the tubular portion of the annular member and the inner ring, slippage between the inner ring and the annular member is reliably prevented.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, this one-way clutch includes an outer ring 1 press-fitted and fixed to a stator 7 by spline fitting, an inner ring 2, and a plurality of sprags 3 arranged between the inner ring 2 and the outer ring 2. The outer cage 4 and the inner cage 5 for holding the sprag 3, the spring 6 for urging the sprag 3 in one direction, and the annular retainers 8 and 9 arranged on both sides of the outer ring 1 are basically used. Is configured.

On both sides of the outer ring 1, the one annular retainer 8 having an outer diameter larger than the inner diameter of the outer ring 1 and an inner diameter smaller than the outer diameter of the inner ring 2 is provided.
They are arranged so as to close the space between them.

Stepped portions 11 and 12 having an L-shaped cross section are formed on the outer peripheral portion and the inner peripheral portion of the inner side surface 8a of the annular retainer 8, and the end portion of the outer ring 1 and the end portion of the inner ring 2 are loosely fitted. Has been done. As a result, the inner side surface 8a of the annular retainer 8 is located in the space between the inner and outer rings 2,1. The other annular retainer 9 is integrally formed as a part of the stator 7 to close the space between the inner and outer races 2 and 1, and the inner diameter of the annular retainer 9 is smaller than the outer diameter of the inner race 2. Further, a stepped portion 13 having an L-shaped cross section is formed on the inner peripheral portion of the inner side surface 9a of the annular retainer 9, and the end portion of the inner ring 2 is loosely fitted.

The inner ring 2 is made of a metal such as bearing steel or carbon steel, and the one annular retainer 8 is made of synthetic resin. The inner ring 2 and the annular retainer 8 are integrally formed. Therefore, the annular retainer 8 is attached to the stator 7
Not linked to. Specifically, the tubular portion 14 is formed on the inner peripheral portion of the annular retainer 8, and the inner ring 2 is integrally formed on the outer peripheral portion of the tubular portion 14. Also, the tubular portion 1
A spline 17 that fits into a spline 16 formed on the cylindrical fixed shaft 15 is integrally formed on the inner peripheral surface of the resin 4 at the time of resin molding. Since the annular retainer 8 is fixed together with the inner ring 2 in this manner, it does not move in the axial direction due to the axial load, the conventional thrust needle bearing is unnecessary, and the number of parts can be reduced.

Although the inner ring 2 and the annular retainer 8 are integrally formed, as shown in FIGS. 2A and 2B, the inner peripheral surface of the inner ring 2, that is, the joint surface 2a, and the outer peripheral surface of the annular retainer 8, that is, The joint surface 8b is provided with mesh-shaped knurled portions 18 and 19 as rotation preventing means. In addition to the mesh, various configurations such as knurling the uneven portion on the circumference can be applied. Further, although the whirl-stop mechanism is formed on both the inner ring 2 and the annular retainer 8, it may be formed on at least one of them.

The other annular member 9 may be made of synthetic resin or aluminum alloy.

[0015]

Since the one-way clutch of the present invention has the structure described in detail above, since the metal inner ring and the synthetic resin annular member are integrally molded, the one-way clutch can be easily handled during assembly. Further, by forming the spline for fitting with the spline shaft integrally with the tubular portion of the synthetic resin annular member at the time of resin molding, the number of man-hours for processing the inner ring can be reduced. Furthermore, since the whirl-stop mechanism is arranged on the joint surface between the tubular portion of the annular member and the inner ring, slippage between the inner ring and the annular member is reliably prevented.

[Brief description of drawings]

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

FIG. 2 (A) is an exploded perspective view of an inner ring of the present invention, and FIG. 2 (B) is an exploded perspective view of an annular retainer of the present invention.

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

[Explanation of symbols]

1 outer ring 2 inner ring 3 sprags 4 Outer cage 5 Internal cage 6 springs 7 Stator 8,9 Annular retainer 14 Cylindrical part 15 rotation axis 16,17 spline 18,19 Detent mechanism

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-50-125153 (JP, A) JP-A-59-164422 (JP, A) JP-A-61-218866 (JP, A) JP-A-63- 303232 (JP, A) JP 64-65363 (JP, A) JP 5-272612 (JP, A) JP 7-185776 (JP, A) JP 7-167169 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) F16D 41/06-41/07 F16H 41/24 F16H 41/28

Claims (4)

(57) [Claims] 1. An outer ring fitted to a housing member, an inner ring, a plurality of engaging members arranged between the outer ring and the inner ring, a retainer for holding the engaging members, and each of the engaging members. A one-way clutch comprising a spring for urging a member in one direction and annular members arranged on both sides of the outer ring so as to close the space between the inner and outer rings, wherein the inner ring is made of metal and A one-way clutch, characterized in that the annular member is formed of synthetic resin, and the inner ring and the annular member are integrally molded. 2. The inner peripheral portion of the synthetic resin annular member is formed into a cylindrical portion extending in the axial direction, and the inner ring is integrally molded with the outer peripheral portion of the cylindrical portion. 1
One-way clutch described in. 3. The one-way clutch according to claim 2, wherein a spline that fits with a spline shaft is formed on the inner peripheral surface of the tubular portion of the annular member. 4. The one-way clutch according to claim 2, wherein at least one of the joint surfaces of the tubular portion of the annular member and the inner ring is provided with a rotation stopping means.