JPH0545863Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a one-way clutch, and particularly to a one-way clutch provided in a starting device for a vehicle engine.

[Conventional technology]

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

For example, in a motorcycle, as shown in FIG. 1, a driven gear 2 rotated by a starter motor (not shown) via an intermediate gear 1 is connected to a bearing 5 at the end of a crankshaft 4 of an internal combustion engine 3. The boss portion 2 of the driven gear 2 is rotatably provided through the
A rotor 8 (one of the power transmission members) of an AC generator 7 in which a one-way clutch 6 is fitted to a and the one-way clutch 6 is provided at the tip of the crankshaft 4, and an outer ring fixed to the rotor 8 with bolts 9. 10 and transmits the rotation of the starter motor to the crankshaft 4 via the intermediate gear 1, 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, causing the rotor 8 and outer ring 10 to rotate, but the one-way clutch 6 prevents the driven gear 2 from rotating and prevents the rotation of the internal combustion engine 3 from being transmitted to the starter motor. ing.

As an example of the one-way clutch 6 used in such a starting device, in addition to the one shown in Japanese Patent Application Laid-Open No. 60-26822, as shown in FIG. A cam 13 is disposed, and the inner peripheral edges of both side plates 11 and 12 are locked with a wire cage 14, and the cam 13 is disposed between both side plates 11 and 12.
One-way clutch 6
A ring-shaped coil spring 15 is wound around the groove 13a of the cam 13 formed on the outer circumferential side of the cam 13 to prevent it from coming off (see Japanese Patent Application Laid-open No. 73632/1983).

[The problem that the idea attempts to solve]

One-way clutch 6 configured in this way
The inner circumferential side is fitted into the boss portion 2a of the driven gear 2 corresponding to the inner ring, and the outer circumferential side is held by the outer ring 10, and the outer side of the side plate 11 is prevented from coming off in the axial direction by the rotor 8 of the AC generator 7. ing.

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

For this reason, conventionally, a flange portion 11a is formed on the outer peripheral edge of the side plate 11, and this flange portion 11a is sandwiched between the rotor 8, which is a power transmission member, and the outer ring 10, so that it can rotate integrally with the rotor 8 and the outer ring 10. However, the side plate 11 is attached to the rotor 8 and the outer ring 10.
Because it is simply sandwiched between them, it may rotate together with them, but depending on the degree of friction, it may rotate slower than these or not rotate at all.

Therefore, the present invention provides a one-way clutch that can rotate integrally with the power transmission member and the outer ring when the crankshaft is rotated by the internal combustion engine.

[Means to solve the problem]

In order to solve these problems, the present invention holds a large number of cams between a pair of ring-shaped side plates, and extends a flange portion on the outer periphery of one side plate to be sandwiched between the power transmission member and the outer ring. In the provided one-way clutch, a plurality of bulges are formed at appropriate intervals in the circumferential direction on the flange portion that is inserted into the annular recess formed on the side surface of the outer ring, and the bulges include:
It is characterized in that a circumferential cut is made in the flange portion, and the outer peripheral side of the cut bulges in the same direction as the axis of the one-way clutch.

[Function] In this way, the bulging part makes a circumferential cut in the flange part, and the outer circumferential side of the cut bulges out in the same direction as the axis of the one-way clutch, so it is easy to assemble the one-way clutch. At this time, since the bulging part is held between the power transmission member and the outer ring and only the bulging part is deformed, the deformation of the bulging part is not transmitted to the flange part and the side plate, and there is no adverse effect on the one-way clutch body.

In addition, the flange portion of the outer peripheral edge of the side plate that is held between the power transmission member and the outer ring is held between them with a considerable frictional force due to the biasing force of the bulging portion. It can rotate together with the outer ring.

〔Example〕

Hereinafter, a first embodiment of the present invention will be described based on FIGS. 3 and 4.

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 between 2 and both side plates 21, 2.
A wire cage 24 that is hooked to a locking portion formed on the inner peripheral edge of the clutch 2 to sandwich the cam 23 between the side plates 21 and 22, and a groove 23a formed in a portion of the cam 23 corresponding to the outer peripheral side of the one-way clutch 20. The outer circumferential edge of the side plate 21 located on the rotor 8 side of the AC generator 7, which is the driven side, has a coil spring 25 for transmitting power. A flange portion 21a sandwiched between the rotor 8 and the outer ring 27, which are members
The flange portion 21a is provided with a plurality of (three in the illustrated case) bulging portions 26 which alternately change direction in the circumferential direction and are formed at equal intervals with appropriate intervals. .

As shown in FIG. 4, the bulging portion 26 is formed into a semicircular shape by press molding or the like on the flange portion 21a, and is formed by making a circumferential cut in the flange portion 21a, and forming a cut on the outer circumferential side of the cut. The flange portion 21a is inserted into an annular recess 28 formed in the side surface of the outer ring 27, which bulges out in the same direction as the axis of the one-way clutch 20.

One-way clutch 20 configured in this way
When assembled into the starter device, the bulging portion 26 is held between the rotor 8 and the outer ring 27 and only the bulging portion 26 is deformed, so that the deformation of the bulging portion 26 is transmitted to the flange portion 21a and the side plate 21. No, it does not have any adverse effect on the one-way clutch 20 body.

Further, since the bulging portion 26 is pressed by the rotor 8 and the outer ring 27 against the biasing force of the bulging portion 26, the frictional force increases, and the side plate 21, that is, the one-way clutch 2
0 is constantly rotated integrally with the rotor 8 and outer ring 27.

FIG. 5 shows a second embodiment of the present invention, in which the side plate 29
Six bulging portions 30 are formed in only one direction on a flange portion 29a extending on the outer peripheral edge of the flange portion 29a. Outer part 30 is outer ring 2
7 and is held in place.

FIG. 6 shows a third embodiment of the present invention, in which the side plate 31
Six bulging parts 32 formed on a flange part 31a extending on the outer peripheral edge of the flange part 32 are cut off at one end to form a quarter circle shape.

FIGS. 7 and 8 show a fourth embodiment of the present invention, in which the one-way clutch 33 has a scrub-type cam 3 by means of a retainer 34 and a ribbon spring 35.
Among the side plates 37 and 38 formed on both sides of the retainer 34, the side plate 37
A flange portion 37a is formed to extend on the outer peripheral edge of the flange portion 37a, and a bulging portion 39 is formed on the flange portion 37a as in the first embodiment.

These second, third, and fourth embodiments also have the same effects as the first embodiment.

In addition, since the bulging part is formed in the circumferential direction of the flange part, the flange part extending to the outer peripheral edge of the side plate only needs to be formed to a width that allows the bulging part to have a sufficient biasing force. Increase in weight and external dimensions can be reduced.

[Effect of idea]

As described above, the one-way clutch of the present invention holds a large number of cams between a pair of ring-shaped side plates, and is inserted into an annular recess formed on the side surface of the outer ring that extends around the outer periphery of one side plate. On the flange part,
A plurality of bulging portions are formed at appropriate intervals in the circumferential direction, and the bulging portions are formed by making circumferential cuts in the flange portion, and extending the outer peripheral side of the cuts in the same direction as the axis of the one-way clutch. Because it swells,
When the one-way clutch is assembled, the bulging part is held between the power transmission member and the outer ring and only the bulging part is deformed, so the deformation of the bulging part is not transmitted to the flange part and side plate, which will adversely affect the one-way clutch body. I won't give it.

In addition, the flange portion of the outer peripheral edge of the side plate that is held between the power transmission member and the outer ring is held between them with a considerable frictional force due to the biasing force of the bulging portion. It can rotate together with the outer ring.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing a state in which a conventional one-way clutch is assembled into a starter device, Fig. 2 is a partially cutaway front view of a conventional one-way clutch, and Figs. Fig. 3 is a cross-sectional view of the main part showing a state in which the one-way clutch is assembled into the starting device, Fig. 4 is a perspective view of the side plate,
FIG. 5 is a perspective view of the side plate showing the second embodiment, FIG. 6 is a perspective view of the side plate showing the third embodiment, FIGS. 7 and 8 are the fourth embodiment, and FIG. 8 is a partially cutaway front view of the one-way clutch, and FIG. 8 is a sectional view of the essential parts showing the one-way clutch assembled into the starter device. 2...Driven gear, 2a...Boss part, 8...
Rotor, 20...One-way clutch, 21,2
2, 29, 31, 37, 38... side plate, 21a,
29a, 31a, 37a...flange portion, 23,
36...Cam, 24...Wire cage, 25...
Coil spring, 26, 30, 32, 39...
Bayed portion, 27... Outer ring, 28... Annular recess.

Claims (1)

[Scope of utility model registration request] In a one-way clutch in which a large number of cams are held between a pair of ring-shaped side plates, and a flange portion that is held between the power transmission member and the outer ring extends from the outer peripheral edge of one side plate, the cam is formed on the side surface of the outer ring. A plurality of bulging portions are formed at appropriate intervals in the circumferential direction on the flange portion to be inserted into the annular recess, and the bulging portions are formed by making a circumferential cut in the flange portion and forming the outer periphery of the cut. A one-way clutch characterized by a side bulging in the same direction as the axis of the one-way clutch.