JPH0582488B2 - - Google Patents

Description

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

[Conventional technology]

In a vehicle engine starting device, the rotation of the starter motor is transmitted to the crankshaft via a large number of gears, but 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. 1, a driven gear 2, which is rotated by a starter motor (not shown) via an intermediate gear 1, is rotatably provided at the end of a crankshaft 4 of an internal combustion engine 3 via a bearing 5. Fitting the one-way clutch 6 to the boss 2a of the driven gear 2,
The one-way clutch 6 is held by a rotor 8 of an AC generator 7 provided at the tip of the crankshaft 4 and a clutch outer 10 fixed to the rotor 8 with bolts 9, and the rotation of the starter motor is controlled by the intermediate gear 1,
The signal is transmitted to the crankshaft 4 via the driven gear 2, one-way clutch 6, and rotor 8 to start the internal combustion engine 3. When the internal combustion engine 3 is started, the crankshaft 4 is rotated by the internal combustion engine 3, and the rotor 8 Although the clutch outer 10 is rotated, the driven gear 2 is not rotated by the one-way clutch 6, and the rotation of the internal combustion engine 3 is not transmitted to the starter motor.

As an example of a one-way clutch 6 used in such a starting device, as shown in FIG. 2, a large number of cams 13 are arranged in a ring shape between a pair of league-shaped side plates 11, The inner peripheral edge of the cam 12 is locked with the wire cage 14, and the cam 13 is held between the side plates 11 and 12 to form a ring body. A ring-shaped coil spring 15 is wound around the groove 13a to prevent it from coming off.

One-way clutch 6 configured in this way
In the starting device, the peripheral surface of the cam 13 is brought into contact with the boss portion 2a of the driven gear 2, which is an input member inserted into the inner periphery of the ring body, and the clutch outer 10, which is an output member arranged on the outer periphery of the ring body. At the same time, the outer side of one side plate 11 is prevented from coming off by a roller 8 of an AC generator 7 which is a member to which the output from the clutch out 10 is transmitted.

[Problem to be solved by the invention]

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

For this reason, conventionally, a flange portion 11a is formed on the outer peripheral edge of the side plate 11, and the flange portion 11a extends outward in the radial direction of a ring body bent slightly outward.
1a is held between the rotor 8 and the clutch outer 10 so that it can rotate integrally with the rotor 8 and the clutch outer 10.
Because it is simply sandwiched between the clutch outer 10 and the clutch outer 10,
It may rotate together with these, but depending on the degree of friction, it may rotate slower than these, or it may not rotate at all.

Therefore, the present invention allows the one-way clutch to rotate integrally with the output member and the transmitted member, for example, when the crankshaft is being rotated by the internal combustion engine.

[Means to solve the problem]

In order to solve such problems, the present invention
It consists of a ring body in which a large number of cams arranged in a ring shape are sandwiched and held by a pair of ring-shaped side plates, and an input member inserted into the inner periphery of the ring body and an output member arranged on the outer periphery are connected to each other. In a one-way clutch that brings the two surfaces of the cam into contact, a flange portion sandwiched between the output member and the transmitted member to which the output of the output member is transmitted is attached to one outer peripheral edge of the side plate, and the radius of the ring body is The present invention is characterized in that a resilient piece is formed on the flange portion and extends outward in the direction, and has a biasing force in the same direction as the axis of the ring body.

[Effect]

Therefore, since the flange portion of the side plate held between the output member and the transmitted member is located radially outward of the ring body, the elastic piece is used to connect the output member and the transmitted member. The output member and the transmitted member rotor can rotate together with the output member and the transmitted member rotor.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 3 to 5.

The one-way clutch 20 has a pair of ring-shaped side plates 21 and 22 and both side plates 21 and 2, as in the conventional case.
A large number of cams 23 are arranged in a ring shape between the two sides, and the cams 23 are held between the side plates 21 and 22 by being held in the locking portions formed on the inner peripheral edges of the side plates 21 and 22. It is composed of a wire cage 24 forming a body, and a ring-shaped coil spring 25 for preventing detachment, which is fitted in order into a groove 23a formed on the outer peripheral side of the ring body of the cam 23 and wound. The flat surface of the cam 23 contacts the boss portion 2a of the driven gear 2, which serves as an input member inserted into the inner periphery of the ring body, and the clutch outer 10, which serves as an output member, arranged on the outer periphery of the ring body, and is held in the starter device. At the same time, the outer side of one side plate 21 is prevented from coming off by the rotor 8 of the AC generator 7, which is a member to which the output from the clutch outer 10 is transmitted.

At the outer peripheral edge of the side plate 21, a flange portion 2 is provided on the outer peripheral edge of the side plate 21, which extends outward in the radial direction of a ring body bent slightly outward, and is held between the rotor 8 and the clutch outer 10.
1a is formed.

In this flange portion 21, a pair of cut grooves 26, 26 are formed at an appropriate number of places at equal intervals (for example, three places in the case of illustration) from the outer circumferential side toward the inside. The elastic piece 27 is formed by bending the tongue piece formed in the same direction as the axis of the one-way clutch 20 and making it slightly offset from the flange part 21a.

The resilient piece 27 is biased closer to the cam 23 than the flange portion 21a, as shown in FIG. 4, or biased to the outside of the flange portion 21a, as shown in FIG. In this case, in the former case, the side plate 21 is less deformed when assembled to the starter, and the cam can be sandwiched evenly between the side plates 21 and 22.

Therefore, when the one-way clutch 20 is configured as described above, when the one-way clutch 20 is assembled to the starter, the flange portion 21a and the elastic piece 27 are connected between the rotor 8 of the AC generator 7 and the clutch outer 10. Since the resilient piece 27 is biased toward the flange portion 21a, the friction force of the clamped portion of the side plate 21 is increased, and the one-way clutch 20 is always integrated with the rotor 8 and the clutch outer 10. Can be rotated.

〔Effect of the invention〕

As described above, the one-way clutch of the present invention consists of a ring body in which a large number of cams arranged in a ring shape are sandwiched and held between a pair of ring-shaped side plates, and an input signal inserted into the inner periphery of the ring body. A flange that is sandwiched between the output member and a transmitted member to which the output from the output member is transmitted, the peripheral surface of the cam being brought into contact with the output member disposed on the outer periphery of the member, and the outer peripheral edge of one of the side plates. Since the elastic piece is made to extend outward in the radial direction of the ring body and has a biasing force in the same direction as the axis of the ring body on the flange part, when the outer peripheral edge of the side plate is clamped on the driven side, In addition, the friction force between the driven side and the driven side increases, making it possible to rotate together with the driven side.

In addition, since the resilient piece is formed on the flange portion located radially outward of the ring body, the axial force of the one-way clutch does not act on the cam, causing axial misalignment of the cam and local parts of the members constituting the one-way clutch. Wear can be avoided.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the one-way clutch installed in a starter device, Fig. 2 is a partially cut-away front view of a conventional one-way clutch, and Fig. 3 is a partially cut-away front view of the one-way clutch of the present invention. Figure, 4th
5 and 5 are cross-sectional views taken from FIG. 3, respectively, showing different embodiments. 2...Driven gear, 2a...Boss part, 7...
AC generator, 8... Rotor, 10... Clutch outer, 20... One-way clutch, 2
1, 22... Side plate, 21a... Flange portion, 23
...Cam, 24...Wire cage, 25...Coil spring, 26...Groove, 27...Bullet piece.

Claims (1)

[Claims] 1. Consists of a ring body in which a large number of cams arranged in a ring shape are sandwiched and held by a pair of ring-shaped side plates, and an input member inserted into the inner periphery of the ring body and arranged on the outer periphery. In the one-way clutch that brings the circumferential surface of the cam into contact with the output member, a flange is provided on one outer peripheral edge of the side plate and is sandwiched between the output member and a transmitted member to which an output from the output member is transmitted. 1. A one-way clutch, characterized in that a spring portion extends outward in the radial direction of the ring body, and a resilient piece having a biasing force in the same direction as the axis of the ring body is formed on the flange portion. 2. The one-way clutch according to claim 1, wherein the resilient piece is bent toward the cam. 3. The one-way clutch according to claim 1, wherein the resilient piece is bent on the opposite side of the cam.