JPH0647740U - One way clutch - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a one-way clutch that can realize weight reduction. [Structure] A sprag 3 arranged at a predetermined interval in the circumferential direction between an outer ring 1 and an inner ring 2, cages 4 and 5 for holding the sprag 3 at the predetermined interval, and the sprag 3. A one-way clutch having a spring 8 for urging the outer ring 1 and the inner ring 2 in a meshing direction, wherein the sprag 3 is a hollow 10 penetrating in the axial direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention has a predetermined number of concentric inner and outer rings, and has a sprag that contacts the outer and inner surfaces of the inner ring while being biased in one direction by a spring to engage the inner and outer rings. However, the present invention relates to a one-way clutch in which relative rotation in one direction of the inner ring and the outer ring is blocked and torque is transmitted by the wedge action of the sprag according to the rotation directions of the inner ring and the outer ring.

[0002]

[Prior art]

 As a conventional one-way clutch using a sprag, for example, as described in Japanese Patent Application Laid-Open No. 60-151426, a sprag disposed at a predetermined interval in the circumferential direction between an outer ring and an inner ring, A retainer for holding the sprags at the predetermined intervals, and a spring for biasing the sprags in the meshing direction with respect to the outer ring and the inner ring, and the wedge of the sprag depending on the rotating direction of the inner ring and the outer ring. There is known a one-way clutch that transmits torque in one direction of the inner and outer wheels by its action.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional one-way clutch, the sprag is made of an iron material, for example, SUJ2 which is a high carbon chrome bearing steel, and since it is solid, the weight is heavy and such a sprag is used. It may be difficult to reduce the weight of the one-way clutch. Therefore, it may be disadvantageous in a place where the weight reduction is required, for example, in an auto transmission of a vehicle. Therefore, an object of this invention is to provide a lightweight one-way clutch.

[0004]

[Means for Solving the Problems]

 As means for solving the above-mentioned problems, sprags which are arranged at a predetermined interval in the circumferential direction between an outer ring and an inner ring, a retainer which holds the sprags at the predetermined intervals, and the sprags are In the one-way clutch having a spring for biasing the outer ring and the inner ring in the meshing direction, the sprag is a hollow that penetrates in the axial direction. Further, the hollow portion of the sprag may be filled with a vibration damping material.

[0005]

[Action]

 The one-way clutch configured as described above is lightweight because the sprag is hollow, and as a result, the one-way clutch itself is lightweight. Further, by constructing the hollow portion filled with a vibration damping material, not only is the weight reduced, but further, when vibration occurs during operation of the one-way clutch, the vibration is damped and alleviated.

[0006]

【Example】

 Hereinafter, a specific embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front sectional view of a one-way clutch according to the present invention as viewed from the axial direction. A predetermined number of sprags 3 are arranged between the inner peripheral surface of the outer ring 1 and the outer peripheral surface of the inner ring 2. An inner cage 4 and an outer cage 5 arranged in a double circle are arranged between the outer ring 1 and the inner ring 2. The inner cage 4 and the outer cage 5 are formed with a plurality of pockets 6 and 7 in the same number as the sprags 3 in the circumferential direction. The pockets 6 and 7 at the corresponding circumferential positions are provided with the sprags. 3 are inserted one by one, and at the same time when this is inserted, the sprags 3 are also inserted in the holes 9 of the ribbon spring 8 annularly arranged between the inner cage 4 and the outer cage 5. Each of these slugs 3 is held by the inner cage 4 and the outer cage 5 so as to be swingable at regular intervals in the circumferential direction, and the ribbon spring 8 makes contact with the inner ring 2 and the outer ring 1. Among the levers, they are urged in the meshing direction with respect to the outer wheels 2, 1.

As shown in FIG. 2, the sprag 3 has a hollow shape 10 penetrating in the axial direction. The sprag 3 is manufactured as follows. That is, a steel pipe made of an iron-based material such as SUJ2, which is a high carbon chromium bearing steel, is drawn into a predetermined sprag shape, cut into a predetermined axial width of the sprag, and burrs are removed to remove burrs and the like at the time of cutting. Apply processing. Then, heat treatment is performed to obtain necessary hardness and other properties, and finally barrel finishing is performed to finally finish the surface and shape.

FIG. 3 shows another embodiment, in which the hollow portion 10 of the sprag 3 is filled with a vibration damping material such as an elastic material 11 made of a synthetic resin member or a rubber member, or a non-ferrous material such as an Mn-Cu alloy. Has been done. By adopting this shape, in addition to reducing the weight, when vibration occurs during operation of the one-way clutch, the vibration is mitigated and the vibration damping effect is achieved. It also has the effect of damping or mitigating the propagation of vibrations through the one-way clutch.

[0009]

[Effect of device]

 Since the one-way clutch according to the present invention has the structure described in detail above, the weight of the one-way clutch can be reduced.

[0010]

[Brief description of drawings]

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

2 is a perspective view of the sprag of FIG. 1. FIG.

FIG. 3 is a perspective view of a sprag according to another embodiment.

[Explanation of symbols]

 1 Outer Ring 2 Inner Ring 3 Sprag 4 Inner Cage 5 Outer Cage 8 Ribbon Spring 10 Hollow Part 11 Elastic Material

Claims (2)

[Scope of utility model registration request] 1. A sprag disposed between an outer ring and an inner ring at a predetermined interval in the circumferential direction, a cage for holding the sprag at the predetermined interval, and the sprag with respect to the outer ring and the inner ring. A one-way clutch having a spring for biasing in a meshing direction, wherein the sprag is a hollow hole that penetrates in the axial direction. 2. The one-way clutch according to claim 1, wherein the hollow portion of the sprag is filled with a vibration damping material.