JPH0589975U - One way clutch retainer - Google Patents

Abstract

(57) [Summary] [Purpose] The retainer is provided with an engaging piece that projects outward in the radial direction, and the engaging piece is engaged with the outer race to reduce the number of parts and facilitate assembly. [Structure] A retainer is provided in which a large number of sprags provided between the outer race and the inner race are arranged at a predetermined pitch in the circumferential direction. One piece is provided, and the outer peripheral end portion of the engaging piece is brought into pressure contact with the inner peripheral surface of the outer race.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a one-way clutch in which a large number of sprags are provided between an outer race and an inner race, and the outer race and the inner race are engaged and disengaged by the operation of the sprags to transmit torque only in one direction. The present invention relates to retainers in which are arranged at a predetermined pitch in the circumferential direction.

[0002]

[Prior Art]

 As a conventional technique, there is a structure shown in FIG. That is, the outer race 1 and the inner race 2 are fitted concentrically with each other while keeping a predetermined gap in the radial direction, and a large number of sprags 3 are circumferentially arranged between the outer race 1 and the inner race 2. Further, an annular outer peripheral retainer 4, a ribbon spring 6, and an inner peripheral retainer 5 having a large number of windows in the circumferential direction are sequentially arranged concentrically in the radial direction and fitted between the outer race 1 and the inner race 2, The sprags 3 are fitted into the respective window holes of the outer peripheral retainer 4, the ribbon spring 6 and the inner peripheral retainer 5, the sprags 3 are arranged at a predetermined pitch in the circumferential direction, and the spring force of the ribbon spring 6 keeps them neutral. To have.

For example, five gate-shaped drag clips 7 are attached to the outer peripheral retainer 4 with a predetermined pitch in the circumferential direction, and the outer peripheral ends of the drag clips 7 are elastically engaged with the inner peripheral surface of the outer race 1 to form the outer peripheral retainer 4. Is strongly engaged with the outer race 1. Further, a strip-shaped drag strip 8 is attached to the inner diameter side of the inner peripheral retainer 6, and the inner peripheral surface of the drag strip 8 is slidably elastically contacted with the outer peripheral surface of the inner race 2 to move the inner peripheral retainer 5 to the inner race. Loosely lock to 2.

[0004]

[Problems to be solved by the device]

 In the above-mentioned conventional one, the small-sized drag clip 7 is attached to the outer peripheral retainer 4, and the outer peripheral retainer 4 is engaged with the outer race 1 by the drag clip 7. Therefore, the small-sized parts are increased and the cost becomes high. There was a drawback that it took time to assemble. It is an object of the present invention to obtain a new one-way clutch that solves the above drawbacks.

[0005]

[Means for Solving the Problems]

 The present invention is configured as follows to achieve the above object. That is, an annular retainer having window holes formed at a predetermined pitch in the circumferential direction is concentrically provided between the outer race and the inner race, and a large number of sprags provided between the outer race and the inner race are provided on the retainer. In a retainer of a one-way clutch that is fitted in each window hole and arranged at a predetermined pitch in the circumferential direction, a plurality of engaging pieces that protrude radially outward are formed on the outer peripheral surface of the retainer in the circumferential direction. The outer peripheral end of the engaging piece is brought into pressure contact with the inner peripheral surface of the outer race.

[0006]

[Action]

 Since the present invention has the above-mentioned structure, when the retainer is fitted between the outer race and the inner race, the outer peripheral end of the engaging piece of the retainer is pressed into contact with the inner peripheral surface of the outer race. Each sprag fixed to the outer race and interposed between the outer race and the inner race has a circumferential pitch maintained at a predetermined value by each window hole of the retainer.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 is a sectional view of an essential part showing an embodiment of the present invention, FIG. 2 is a perspective view of a retainer, and FIG. 3 is a sectional view taken along line III-III of FIG. It should be noted that, in FIG. 1, portions having the same reference numerals as those in FIG. 4 have substantially the same structure as those in FIG. 1 to 3, reference numeral 10 denotes an outer peripheral retainer which is a feature of the present invention. The outer peripheral retainer 10 is formed of a sheet metal material, and as shown in FIGS. 2 and 3, for example, 20 to 25 window holes 12 are circumferentially formed in the center of the main body 11 formed in an annular shape in the width direction. It is formed at a predetermined pitch. The window hole 12 is for fitting the outer peripheral portion of the sprag 3 provided between the outer race 1 and the inner race 2 and arranging the sprag 3 in a predetermined pitch in the circumferential direction.

Of the window holes 12, engagement pieces 13 that project outward in the radial direction are formed at the edges of, for example, five window holes 12a arranged at predetermined intervals in the circumferential direction. The engagement piece 13 is formed by folding the wall of the main body 11 upward and in one circumferential direction when forming the window 12a. Then, the outer peripheral retainer 10 is fitted into the outer race 1, and the outer peripheral edge 13a of the engaging piece 13 is pressed against the inner peripheral surface of the outer race 1 so that the outer peripheral retainer 10 is engaged with the outer race 1 so as not to rotate relative to each other. .. The outer peripheral retainer 10 may be made of synthetic resin. In this case, the engagement piece 13 is formed by bulging a part of the outer peripheral surface of the main body 11 outward in the radial direction when the outer peripheral retainer 10 is molded.

According to the above embodiment, when the outer peripheral retainer 10 is fitted between the outer race 1 and the inner race 2, the outer peripheral retainer 10 has the outer peripheral edge 13 a of the engaging piece 13 of the inner race of the outer race 1. The surface is engaged and fixed to the outer race 1. Further, each sprag 3 interposed between the outer race 1 and the inner race 2 has an outer peripheral portion formed by each window hole 12 of the outer peripheral retainer 10 and an inner peripheral portion formed by each window hole of the inner peripheral retainer 5. Thus, the pitch in the circumferential direction is maintained at a predetermined value. In FIG. 1, when the outer race 1 rotates relative to the inner race 2 to the left, the sprag 3 rotates counterclockwise, that is, rotates in the upright direction to frictionally engage the outer race 1 and the inner race 2. Then, when the outer race 1 rotates relative to the inner race 2 to the right, the sprags 3 rotate clockwise, that is, in the tilt direction to release the frictional engagement.

[00010]

[Effect of the device]

 As is clear from the above description, according to the present invention, the retainer is engaged with the outer race by the engaging piece formed on the outer peripheral surface of the retainer, so that the number of parts is reduced and the assembly is inexpensive and easy to assemble. Has the effect.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of the present invention.

FIG. 2 is a perspective view of a retainer.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view of a main part showing a conventional example.

[Explanation of symbols]

 1 Outer Race 2 Inner Race 3 Sprag 5 Inner Retainer 6 Ribbon Spring 8 Drag Strip 10 Outer Retainer 11 Main Body 12 Window Hole 13 Engaging Piece 13a Outer Edge

Claims (1)

[Scope of utility model registration request] 1. Between the outer race and the inner race,
An annular retainer having window holes formed at a predetermined pitch in the circumferential direction is concentrically provided, and a large number of sprags provided between the outer race and the inner race are fitted in the respective window holes of the retainer in the circumferential direction. In a retainer of a one-way clutch arranged at a predetermined pitch, a plurality of engaging pieces protruding outward in the radial direction are formed on the outer peripheral surface of the retainer in the circumferential direction, and the outer peripheral ends of the engaging pieces are formed on the outer race. A retainer for a one-way clutch, wherein the retainer is press-fitted to the inner peripheral surface of the retainer.