JPS63195430A - One-way clutch - Google Patents

Abstract

PURPOSE:To enable a one-way clutch rotate in a body with driven side by frictional force between an outer ring and side plates by disposing a resilient member to impel the side plates in the radial direction between a pair of side plates retaining a lot of cams and the outer ring. CONSTITUTION:Many cams 23 are disposed between ring-shaped side plates 21, 22, a wire cage 24 is hooked on engaging portions formed on the inner peripheral edges of both side plates 21, 22 to retain the cams 23. A coiled spring 25 is fitted and wound in the outer peripheral groove 23a of the cam 23 to serve as a stopper. A flange portion 22a is formed on the outer peripheral edge of one side plate 22, and a groove portion 26a is formed on the inner peripheral surface of an outer ring 26 that confronts the flange portion, and a coiled spring 27 is fitted in the groove portion to force the flange portion 22a in the radial direction. Accordingly, large frictional force generates between the outer ring 26 and the side plate 22, so that a one-way clutch 20 is rotated in a body with the outer ring 26.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a one-way clutch, and particularly to a one-way clutch provided in an engine starting device of a vehicle.

[Conventional technology]

In a vehicle engine starting device, the rotation of the starter motor is transmitted to the crankshaft via many gears.
It is necessary to prevent the rotation of the crankshaft from being transmitted to the starter motor.

Therefore, for example, in a motorcycle, as shown in FIG. A one-way clutch 6 is fitted to the boss portion 2a of the driven gear 2, and the one-way clutch 6 is connected to the crankshaft 4.
The rotor 8 of the AC generator 7 provided at the tip of the AC generator 7 and the outer ring 10 fixed to the rotor 8 with bolts 9 hold the starter motor, and the rotation of the starter motor is controlled by the intermediate gear 1. Driven gear 2. The signal is transmitted to the crankshaft 4 via the one-way clutch 6 and rotor 8 to start the internal combustion engine 3 and start internal combustion! When the engine 3 is started, the crankshaft 4 is rotated by the internal combustion engine 3, and the rotor 8
and the outer ring 10 is rotated, but the one-way clutch 6
Accordingly, the driven gear 2 does not rotate and does not transmit the rotation of the internal combustion engine fIA3 to the starter motor.

One-way clutch 6 used in such a starting device
In addition to the example shown in Japanese Patent Application Laid-Open No. 60-26822, there is also a pair of ring-shaped side plates 11 as shown in FIG.
, 12, and a large number of cams 13 are arranged between the side plates 11 and 12.
The inner peripheral edge side of the wire cage 14 is locked, and both side plates 11
．． A groove 13a of the cam 13 is formed on the outer circumferential side of the one-way clutch 6 to sandwich and hold the cam 13 between the grooves 13a of the one-way clutch 6.
A coil spring 15 formed in a ring shape is wound to prevent it from coming off (see Japanese Patent Laid-Open No. 73632/1983).

[Problem that the invention seeks to solve]

The one-way clutch 6 configured in this manner has an inner circumferential side fitted into the boss portion 2a of the driven gear 2, an outer circumferential side held by the outer ring 10, and an outer side of the side plate 11 connected to the rotor 8 of the AC generator 7. Extraction in this direction is prohibited.

And the one-way clutch 6 assembled in this way
is the crankshaft 4 rotated by the internal combustion engine 3, that is,
It is desirable to rotate together with the rotor 8 and outer ring 10 of the AC generator 7.

For this reason, conventionally, the flange portion 11a is attached to the outer peripheral edge of the side plate 11.
This flange portion 11a is connected to the rotor 8 and the outer ring 10.
However, since the side plate 11 is simply sandwiched between the rotor 8 and outer ring 10, it may rotate together with them, but Il! Depending on the degree of friction, it may rotate slower than these, or may not rotate at all.

Therefore, the present invention enables the one-way clutch to rotate together with the rotor and the outer ring while the crankshaft is being rotated by the internal combustion engine.

(Means for Solving the Problems) In order to solve such problems, the present invention provides a one-way clutch that holds a large number of cams between a pair of ring-shaped side plates, and an outer ring into which the one-way clutch is inserted. and at least one of the side plates, an elastic member for biasing the side plate in the radial direction is disposed.

[For production]

Therefore, the outer peripheral edge of the side plate fitted into the outer ring is urged in the radial direction by the elastic member to increase the frictional force between the two, so that the one-way clutch rotates together with the outer ring.

(Example) Hereinafter, an example of the present invention will be described with reference to FIGS. 3 to 10.

First, FIG. 3 shows a first embodiment of the present invention, in which the one-way clutch 20 includes a pair of ring-shaped side plates 21 and 22, and a large number of cams 23 disposed between the side plates 21 and 22, as in the conventional one. , a wire cage 24 that is hooked to a locking portion formed on the inner circumferential edge of both side plates 21 and 22 and holds the cam 23 between the both side plates 21 and 22, and a cam 23 corresponding to the outer circumferential side of the one-way clutch 20. It is composed of a coil spring 25 formed in a ring shape for preventing detachment, which is sequentially fitted into the formed groove 23a and wound, and is bent outward at the outer peripheral edge of the side plate 22 located on the driven gear 2 side. 7 runs 9
A portion 22a is formed.

Further, a groove 26a is formed on the inner circumferential surface of the outer ring 26 facing the flange 22a of the side plate 22 into which the one-way clutch 20 is inserted, and an annular coil spring 27 is fitted into the groove 26a.

The coil spring 27 slightly protrudes from the groove 26a and biases the seven-run 9 portion 22a in the radial direction of the one-way clutch 20.
6 and the side plate 22 to rotate the one-way clutch 2o together with the outer ring 26.

FIG. 4 shows a second embodiment of the present invention, in which a flange portion 21a bent outward is formed on the outer peripheral edge of the side plate 21 located on the rotor 8 side opposite to that of the first embodiment. Similarly to the first embodiment, a coil spring 29 is disposed in the groove 28 formed between the outer ring 26 and the rotor 8 where the portion 21a is held, so that the 7-run 9 portion 21a extends in the radial direction of the one-way clutch 20. energizes and generates frictional force.

5 and 6 show a third embodiment of the present invention,
An appropriate number of spring bins 30 are fitted between the flange part 21a formed in the same manner as in the second embodiment and the inner periphery of the outer ring 26 into which the flange part 21a is fitted, and the spring bins 30 are used to tighten the side plate 21. is applied in the radial direction of the one-way clutch 20.

7 and 8 show a fourth embodiment of the present invention,
A part of the seven-run 9 part 21a formed in the same manner as in the second and third embodiments is cut and bent, and a resilient part 21b serving as a resilient member is formed on the flange part 21a itself. The resilient portion 21b is brought into pressure contact with the inner circumferential surface of the outer ring 26 to generate a frictional force.

9 and 10 show a fifth embodiment of the present invention, in which a one-way clutch 31 has a large number of scrub-type cams 34 held by a retainer 32 and a ribbon spring 33. Formed side plate 3
5. At the tip of the side plate 35 on the rotor 8 side of 36, the flange part 3 is attached.
5a is bent to form a groove 2 between the outer ring 26 and the rotor 8, in which the flange 35a is held, as in the second embodiment.
8 into which a coil spring 29 is fitted.

Therefore, when the one-way clutch is configured as described above, when the one-way clutch is assembled to the starter, the side plate and the outer ring are elastically supported by the elastic member, and the one-way clutch is moved on the driven side by the frictional force. It can always rotate together with a certain outer ring.

Incidentally, as the resilient member, in addition to those shown in the above-mentioned embodiments, a disc spring, a wave ring, etc. can also be used.

〔Effect of the invention〕

As described above, the present invention provides a one-way clutch in which a large number of cams are held by a pair of side plates, in which the side plates are biased in the radial direction between the outer ring into which the one-way clutch is inserted and at least one of the side plates. Since the resilient member is provided, the frictional force between the outer ring and the side plate enables integral rotation with the driven side.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a one-way clutch installed in a starter device, Fig. 2 is a partially cutaway front view of a conventional one-way clutch, and Fig. 3 is a sectional view showing a first embodiment of the present invention. , FIG. 4 is a cross-sectional view of the main parts of the second embodiment, FIGS. 5 and 6 are the third embodiment, FIG. 5 is a cross-sectional view of the main parts, and FIG. 6 is a perspective view of the spring bin. Figures 7 and 8
The figures show the fourth embodiment, FIG. 7 is a sectional view of the main part, FIG. 8 is a perspective view of the main part, and FIGS. 9 and 10 are the fifth embodiment of the present invention.
9 is a partially cutaway front view of the one-way clutch, and FIG. 10 is a sectional view of the main part. 20...One-way clutch 21.22...Side plate 22a...Flange portion 23...Cam 24
...Wire cage 25...Coil spring 2
6... Outer ring 27... Coil spring muscle 40 muscle 50

Claims (1)

[Claims] 1. In a one-way clutch that holds a number of cams between a pair of ring-shaped side plates, an elastic force is provided between the outer ring into which the one-way clutch is inserted and at least one of the side plates, which urges the side plate in the radial direction. A one-way clutch characterized by the arrangement of parts.