JP2577878Y2 - 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, and more particularly to a one-way clutch which can easily be positioned with a shaft to be mounted.

[0002]

2. Description of the Related Art A one-way clutch generally has an outer ring having a cam surface formed on an inner peripheral surface thereof for moving a roller within a predetermined range and allowing the roller to perform a wedge action and a free rotation action, and a plurality of rollers. The retainer has a pocket for holding the roller, and a spring for urging the roller in one direction in the pocket of the retainer. Such a one-way clutch is interposed between a gear or pulley and the rotating shaft to rotate the gear and the like only in one direction of the rotating shaft. FIG. 5 shows a conventional one-way clutch connected to a gear 6.
FIG. 3 is an axial cross-sectional view of a device mounted between a rotary shaft 40 and a rotary shaft 40 (or a pulley or the like). That is, the one-way clutch comprises the outer race 10, a retainer 20 disposed inside the outer race 10, and a roller 30 disposed in a pocket provided at a constant interval in the circumferential direction of the retainer 20. Is done. The outer race 10 is fitted and fixed to an inner diameter portion of the gear 60 or the like, and is provided with a cage 20 for holding the roller 30.
Is fitted on the outer periphery of the rotating shaft 40. When the gear 60 and the one-way clutch are attached to the rotating shaft 40, a flange portion 60a is formed at an inner end of the gear 60, and further,
A lip portion 60b is formed at several locations on the inner peripheral portion of the flange portion 60a, and the lip portion 60b is formed around the rotary shaft 40.
A method of positioning by fitting to 0a is adopted. The roller 30 is used to perform a wedge action (Japanese Utility Model Laid-Open No. 63-84428).

[0003]

As described above, in order to position and attach the gear 60 to the rotary shaft 40, a projection is formed on the inner diameter portion of each gear or pulley, or a gear such as a snap ring is used. A snap ring had to be used. However, when special processing is performed on a gear part or the like or a separate part is used as described above, the number of parts increases, the number of processing increases, and mounting takes time, work is complicated, and cost increases. Tend. In addition, the lip portion 60b is difficult to provide high accuracy and cannot be mounted depending on the shape.

The present invention has been made to address the above-described problem. When a gear, pulley, or the like is mounted on a rotating shaft, positioning with the rotating shaft is easy and the number of parts does not increase. It is another object of the present invention to provide a one-way clutch that can be easily assembled.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a cam for disposing a roller (3) which moves in a certain range according to the rotation direction of a rotating shaft and performs wedge action and free rotation. A retainer (2) having a pocket (2a) for holding the roller (3) is inserted and arranged in an outer ring (1) having a surface (1b) formed therein, and the end of the outer ring is radially inward. In the one-way clutch formed by bending, between the bent end portion (1c) of the outer ring and the side surface of the retainer (2), a rotating shaft (4) formed in an inner diameter portion and a groove (4a) formed in the outer peripheral surface are formed. A fixing ring (5) having an elastically deformable lip (5a) for fitting is provided.

Alternatively, the retainer (2) and the fixing ring (5) are integrally formed.

[0007]

When the one-way clutch as described above is inserted into a gear, pulley or the like, as it is inserted into the rotating shaft 4, the fixing ring 5 or the lip portion 5a 'of the retainer 2' becomes elastic. It is deformed and inserted. Then, the lip portion 5a or 5a 'of the fixing ring 5 enters the groove 4a formed in the rotating shaft 4, at which position the gears and the one-way clutch are automatically fixed and positioned.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a part of an axial sectional view showing a state in which the one-way clutch of the present invention is mounted on a shaft.
The one-way clutch includes an outer ring 1, a retainer 2, a roller 3 disposed in a pocket 2a provided at a constant interval in a circumferential direction of the retainer 2, and a fixing ring 5. In addition,
The outer ring 1 has flanges 1c and 1d formed radially inward at both ends in a state in which a retainer 2 holding a roller 3 and a fixing ring 5 are fitted inside.

On the outer peripheral surface of the outer ring 1 constituting the one-way clutch, a convex portion 1a is formed at a constant angular interval in the circumferential direction on the inner peripheral side of a gear or the like so as not to rotate. The cam surface 1b is formed in the circumferential direction at a constant interval. The roller 3 moves within a certain range in the cam surface 1b according to the rotation direction of the rotating shaft 4, and performs wedge action and free rotation. The retainer 2 is arranged in the outer race 1. Further, the fixing ring 5 is disposed between one side of the retainer 2 and a flange portion 1c provided to be bent radially inward of the outer ring 1.

FIG. 2A is a front view of the fixing ring 5, and FIG. 2B is a central sectional view of the fixing ring 5. As shown in FIG. Although two lip portions 5a are formed in the inner diameter portion of the fixing ring 5, the number of the lip portions 5a may be one, or three or more. The lip 5a
Are to be fitted into a groove 4a provided around the rotating shaft 4 for positioning, as described later. The fixing ring 5 may be made of any material that can be elastically deformed, such as a resin molded product, a thin metal plate, a rubber ring, and a Teflon sheet.

FIG. 3 is a part of an axial sectional view of a modified embodiment of the present invention in which a one-way clutch is mounted on a shaft. That is, in this modified example, the retainer 2 ′ is formed by integrally forming a portion corresponding to the retainer 2 and a portion corresponding to the fixing ring 5. Therefore, a lip 5a 'is formed on the retainer 2'. Thus, the cage 2 ′
Even if a lip portion 5a 'is formed on the inner periphery of the end portion, the positioning with the rotary shaft 4 can be easily performed.

FIG. 4 is a front view of a modification of the fixing ring 5. The fixing ring 5 has five lip portions 5a formed therein, and the lip portions 5a are fitted into grooves 4a provided around the shaft 4 for positioning.

The configuration of the one-way clutch of the present invention is as described above. When this one-way clutch is incorporated into a gear, pulley, or the like, when the one-way clutch is inserted into the rotary shaft 4, the one-way clutch is fixed.
Alternatively, the lip portion 5a 'of the retainer 2' is inserted after being elastically deformed. Then, the lip portion 5a or 5a 'of the fixing ring 5 enters the groove 4a formed in the rotating shaft 4, at which position the gears and the one-way clutch are automatically fixed and positioned.

[0014]

As described in detail above, according to the one-way clutch of the present invention, it is possible to position and fix the rotating shaft with one clutch alone. Also, the one-way clutch of this invention can be interposed between the rotating shaft in combination with a gear or pulley as a single item. Can be used. Further, the one-way clutch has a small number of parts even in combination with other parts, and the assembling work is extremely simple.

[Brief description of the drawings]

FIG. 1 is a part of an axial sectional view of a state in which a one-way clutch of the present invention is mounted on a shaft.

FIG. 2A is a front view of the fixing ring, and FIG. 2B is a central sectional view of the fixing ring.

FIG. 3 is a part of an axial sectional view of a modified embodiment of the present invention in which a one-way clutch is mounted on a shaft.

FIG. 4 is a front view of a modification of the fixing ring constituting the one-way clutch of the present invention.

FIG. 5 is a part of an axial cross-sectional view showing a state in which a conventional one-way clutch is interposed between a gear and a rotating shaft and attached to a vertical shaft.

[Explanation of symbols]

1 outer ring 1b cam surface 1c,
1d Flange part 2 Cage 2a Pocket 3 Roller 4 Rotary shaft 4a
Groove 5 Fixing ring 5a, 5a 'Lip

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F16D 41/06-41/07 F16C 35/063

Claims (2)

(57) [Scope of request for utility model registration] An outer ring having a cam surface on which a roller for performing a wedge action and free rotation is disposed in a predetermined range according to a rotation direction of a rotating shaft, and a cage for holding the roller is provided. In a one-way clutch in which the outer ring end is bent radially inward while being fitted and disposed, an inner diameter portion is formed on the outer peripheral surface of the rotating shaft between the bent end portion of the outer ring and a side surface of the retainer. A one-way clutch comprising a fixing ring having an elastically deformable lip for fitting into a groove. 2. The one-way clutch according to claim 1, wherein said retainer and said fixing ring are formed integrally.