JPH061859U - One way clutch - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a one-way clutch that increases the pull-out prevention force between the cage and the outer ring, does not make tight tightening management difficult, and does not reduce the pull-out prevention force even at high temperatures. thing. [Structure] A pocket 2a for holding the roller 3 is formed at the end of the inner peripheral surface of the outer ring 1 having a cam surface 1b for arranging a roller that freely rotates and a wedge action on the inner peripheral surface. In a one-way clutch formed by press-fitting the outer peripheral surfaces of both ends of the cage 2, a groove 2d is formed on the outer peripheral surface of one end of the cage 2, and the groove 2d is formed at the end of the outer ring 1. A one-way clutch having a collar portion 1c fitted therein.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a one-way clutch, and more particularly to a one-way clutch in which a flange portion is formed at an end portion of an outer ring, and the flange portion is fitted in a groove formed at an end portion of a retainer to improve withdrawal resistance in the axial direction.

[0002]

[Prior art]

 The one-way clutch has an outer ring fixed to a fixed part such as a housing on the outer peripheral side thereof, an outer ring having a cam surface formed on the inner peripheral side thereof, a roller for performing a wedge action on the cam surface and free rotation, and It is composed of a cage having pockets for holding the rollers, a spring for biasing the rollers toward one side of the pocket, and the like. FIG. 5 is an axial cross-sectional view of a conventional one-way clutch, and FIG. 6 is a sectional view taken along the line CC of FIG. 5 (actual Kaihei 2-43532). That is, when the cam surface 10b is formed on the inner peripheral side of the outer ring 10 and the roller 30 is held in the pocket portion 20a of the retainer 20 and the shaft 40 rotates in the direction of the white arrow, the roller 30 is wedged with the shaft 40. The outer ring 10 rotates integrally with the outer ring 10, and when the shaft 40 rotates in the direction of the black arrow, the roller 30 moves to the free rotating side of the cam surface 10b and free-rotates. Does not rotate. In this example, a cage 20 in which a roller 30 is biased and held in a pocket 20a integrally formed with a spring 21 on one side is press-fitted into a shell-shaped outer ring 10. A flange portion 10c is formed at one end of the outer ring 10. The reason why the cage 20 is press-fitted into the outer ring 10 as described above is to increase the pull-out resistance of the cage 20 as much as possible.

[0003]

[Problems to be solved by the device]

 In the one-way clutch in which the retainer 20 is press-fitted into the shell-shaped outer ring 10 having the flange portion formed at one end as described above, it is impossible to increase the withdrawal resistance against pulling-out, and particularly at high temperature. Accordingly, the pulling-out resistance is reduced. Further, it is difficult to control the pulling force of the retainer 20 so that the pulling force is equal to or more than a certain value, that is, the tightening margin. The present invention has been made in view of such problems, and its purpose is to increase the pull-out prevention force between the retainer and the outer ring, and it is not difficult to control the tightening margin and to withstand high temperatures. An object of the present invention is to provide a one-way clutch in which the pull-out prevention force does not decrease.

[0004]

[Means for Solving the Problems]

 That is, in order to solve the above-mentioned problems, the present invention provides the above-mentioned roller at the end of the inner peripheral surface of the outer ring having a cam surface for arranging the roller for freely rotating and wedge action on the inner peripheral surface. In a one-way clutch formed by press-fitting the outer peripheral surfaces of both ends of a cage in which pockets for holding are formed, a groove is formed on the outer peripheral surface of one end of the cage, and the groove of the outer ring is formed in the groove. It is characterized in that the collar portion formed at the end is fitted.

[0005]

[Action]

 If the one-way clutch is used as the above-mentioned means, not only does it become unnecessary to make dimensional tolerances tight at the time of press fitting, but also the pull-out prevention force after press fitting the retainer 2 to the outer ring 1 and assembling becomes extremely large.

[0006]

【Example】

 Hereinafter, a specific embodiment of the present invention will be described with reference to the drawings. 1 is an axial sectional view of the one-way clutch of the present invention, and FIG. 2 is a view taken in the direction of arrow P in FIG. The outer ring 1 is formed with rotation preventing projections 1a for fitting into a housing (not shown) or the like at a constant angular interval on the outer peripheral surface, and a cam surface 1b is formed on the inner peripheral surface, where the rollers are provided. 3 are arranged. The cage 2 has the same number of pockets 2a as the rollers 3, but the pocket 2a of the cage 2 has a structure similar to that shown in FIG. (Refer to FIG. 3) is integrally formed to urge the roller 3.

The outer peripheral surfaces 2b and 2c of both ends of the retainer 2 are formed so as to be press-fitted into the end portions of the inner peripheral surface of the outer ring 1 on which the cam surface 1b is provided. A groove 2d is provided around the outer peripheral surface 2c. Then, the cage 2 is press-fitted into the outer ring 1 from the open side, and the flange portion 1c formed at the end of the outer ring 1 is fitted into the groove 2d. In this case, the width e of the groove of the retainer 2 is formed slightly larger.

Next, FIG. 3 is a modified embodiment of the one-way clutch according to the present invention, and FIG. 4 is a view taken in the direction of the arrow Q in FIG. 3, but FIG. 3 is a sectional view taken along the line A-O-B in FIG. It is a figure. In this embodiment, protrusions 2g, 2g, etc. are formed at constant angular intervals on the outside of the groove 2d formed on the outer peripheral surface 2c side of the end portion of the cage 2, and the flange portion 1c is fitted into the groove 2d. The collar portion 1c of the outer ring 1 and the groove 2d of the cage 2 may be formed on opposite sides.

If this one-way clutch is configured as described above, not only does it become unnecessary to tighten the dimensional tolerance at the time of press fitting, but also the withdrawal resistance is prevented after the cage 2 is press fitted to the outer ring 1 and assembled. The power becomes extremely large.

[0010]

[Effect of device]

 Since the one-way clutch of the present invention has the structure described in detail above, the pull-out prevention force of the retainer after the retainer is assembled to the outer ring becomes extremely large. In addition, quality control is easy because it is not necessary to strictly control the tight fitting. Further, there is an excellent effect that the pull-out prevention force against the temperature change of the cage does not decrease.

[Brief description of drawings]

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

FIG. 2 is a view on arrow P of FIG.

FIG. 3 is an axial sectional view of a modified embodiment of the one-way clutch according to the present invention.

FIG. 4 is a view on arrow Q in FIG.

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

6 is a cross-sectional view taken along the line CC of FIG.

[Explanation of symbols]

1 Outer ring 1a Outer ring protrusion 1b Cam surface 1c Collar part 2 Cage 2a Pocket 2b, 2
c Cage end outer peripheral surface 2d groove 2g protrusion 3 roller

Claims (1)

[Scope of utility model registration request] 1. An inner peripheral surface end portion of an outer ring having a cam surface for arranging a wedge action and a freely rotating roller on the inner peripheral surface,
In a one-way clutch formed by press-fitting outer peripheral surfaces of both ends of a cage having pockets for holding the rollers, a groove is formed on one outer peripheral surface of one end of the cage, and the outer ring is formed in the groove. A one-way clutch, characterized in that a collar portion formed at the end of the is fitted.