JPH07224863A - Friction clutch device - Google Patents

Abstract

PURPOSE:To prevent the generation of an excessive reverse load through simple structure by a method wherein a roller is arranged between inner and outer races, and in a power from the clutch center side, the power is transmitted without rolling a roller, the roller is rolled at a reverse load exceeding a given value, and the reverse load is absorbed. CONSTITUTION:A rotation force transmitted from a normal crank shaft to a clutch outer 30 is transmitted to a rotary shaft 15 through a clutch disc 39 on the power source side, a clutch disc 40 on the drive system side, the outer race 44 of a one-way clutch 41, a roller 57, and an inner race 42. When, with this state, a force to rotate the roller 57 is exerted by the rotation force of the outer race 44, a clutch component of a force in the direction of an arrow mark A is generated at the outer race 44, the roller 57 is pressed against the inner race 42, and a power is transmitted with the roller 57 not rolled. When an excessive reverse load is exerted from the rotary shaft 15 side and exceeds a given value, a force by which the roller 57 is about to be rotated is exerted by the rotation force of the rotary shaft 15. A rolling component of a force in the direction of an arrow mark B is generated at the outer race 44 and through rolling of the roller 57, a reverse load is absorbed and relaxed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention crimps alternating power source side clutch plates and drive system side clutch plates,
The present invention relates to a friction clutch device that transmits power by the frictional force.

[0002]

2. Description of the Related Art For example, in a friction clutch device, a clutch center connected to a drive system side and integrally rotating with a rotary shaft is provided in a clutch outer connected to a power source side so as to be relatively rotatable. The power source side clutch plate provided and the drive system side clutch plate provided at the clutch center are alternately stacked so as to be movable in the rotation axis direction, and both clutch plates are crimped by the operation of the pressure plate. There is one that transmits power by the frictional force generated between the plates.

This type of friction clutch device is built in a power transmission system path of a motorcycle or the like. However, if an excessive reverse load is applied from the drive system due to sudden engine braking, the reverse load is directly applied to the engine or the engine. Since it joins the power transmission system path, it may adversely affect both of them.

As a countermeasure against this, for example, Japanese Patent Laid-Open No. 59-23.
As disclosed in Japanese Unexamined Patent Publication No. 1227, there is a one-way clutch that allows only power transmission from the drive source side and causes slip between contact surfaces when an excessive reverse load is applied.

[0005]

By the way, in the conventional friction clutch device, a path of power transmission from the drive source side,
To prevent an excessive reverse load from being applied to the engine or power transmission path as it is, there is a separate path to absorb the excessive reverse load, resulting in an increase in the number of parts, a complicated structure, and a clutch configuration. Quality control of parts is not easy.

Further, in the conventional friction clutch device, the pressure plate presses the driving side clutch plate and the driven side clutch plate alternately stacked by the clutch spring attached to the clutch center.
The clutch spring is fastened to the boss of the clutch center that protrudes through the pressure plate with the mounting bolts, so if the mounting height of the clutch spring varies due to the integration tolerance of the clutch components, this variation will occur. It wasn't easy to adjust.

The present invention has been made in view of the above circumstances, and the invention according to claim 1 prevents an excessive reverse load from acting due to sudden engine braking, and absorbs the excessive reverse load. An object of the present invention is to provide a friction clutch device in which the path is the same as the path of power transmission from the drive source side, the number of parts is reduced, the structure is simple, and the accuracy control of clutch component parts is easy. It is another object of the present invention to provide a friction clutch device capable of easily adjusting the variation in the mounting height of the clutch spring due to the stacking tolerance of the clutch component parts.

[0008]

In order to solve the above-mentioned problems, the invention according to claim 1 is a clutch which is connected to a drive system side and rotates integrally with a rotary shaft in a clutch outer connected to a power source side. A center is provided so as to be relatively rotatable, and a power source side clutch plate provided on the clutch outer and a drive system side clutch plate provided on the clutch center are alternately stacked so as to be movable in the rotation axis direction. In a friction clutch device in which a plate is pressed by the operation of a pressure plate and power is transmitted by a frictional force generated between these clutch plates, a one-way clutch is interposed between the rotary shaft and the clutch center. The inner race of the clutch is fixed to the rotating shaft, and the clutch center is attached to the outer race of the one-way clutch. A roller is arranged with a predetermined angle axis with respect to the rotation axis with respect to the race, and the power from the clutch center side does not cause the roller to roll but transmits the power to the rotation axis side. When a reverse load is applied from the side and the reverse load exceeds a predetermined value, the roller rolls and the outer race rotates with respect to the inner race to absorb a predetermined reverse load or more.

According to another aspect of the present invention, there is provided a friction clutch device which penetrates the pressure plate and has a mounting bolt screwed to the outer race via a collar, and between the head of the mounting bolt and the pressure plate. A clutch spring is interposed, and the clutch spring constantly biases the pressure plate in the clutch connecting direction.

[0010]

According to the first aspect of the invention, the one-way clutch is interposed between the rotary shaft and the clutch center, and the power from the power source side does not cause the rollers of the one-way clutch to roll, and the power is transmitted to the rotary shaft side. However, in this state, an excessive reverse load acts from the rotary shaft side due to abrupt engine braking, and when the reverse load exceeds a predetermined value, the rollers are prevented from rolling and the excessive reverse load acts.

Further, the inner race of the one-way clutch is fixed to the rotary shaft, and the clutch center is attached to the outer race so that the path for power transmission from the drive source side and the path for absorbing an excessive reverse load are the same. As a result, the number of parts is reduced, the structure is simple, and the accuracy control of the clutch constituent parts is easy.

According to the second aspect of the present invention, a mounting bolt is screwed through the collar to the outer race through the pressure plate, and a clutch spring is interposed between the head of the mounting bolt and the pressure plate. By selecting the length of the collar and screwing the mounting bolts to assemble them, it is possible to easily adjust the variation in the mounting height of the clutch spring due to the tolerance of the clutch component integration.

[0013]

Embodiments of the friction clutch device according to the present invention will be described below in detail with reference to the drawings. 1 is a side view of a motorcycle, FIG. 2 is a plan view of a partially broken engine, FIG. 3 is a sectional view of a friction clutch device, and FIG. 4 is a perspective view of a roller and a holder of a one-way clutch.

An engine 2 is mounted in the center of a body frame 1 of a motorcycle, and a front fork 3 is rotatably provided on the front side of the body frame 1. A front wheel 4 is supported on the lower part of the front fork 3, and a handle 5 is mounted on the upper part. A front portion of a rear arm 6 is supported on the rear side of the vehicle body frame 1 so as to be vertically movable, and a rear wheel 7 is supported on the rear portion of the rear arm 6. The fuel tank 8 is on the engine 2 and the vehicle body frame 1
A seat 9 is attached to the rear of the fuel tank 8.

The engine 2 is a V-type engine in which a front cylinder 11 and a rear cylinder 12 are arranged in a substantially V-shape on a crankcase 10, and each cylinder 1 is arranged in the crankcase 10.
A crankshaft 14 driven by pistons 1 and 12 and an intermediate rotary shaft 15 and an output shaft 16 are accommodated in parallel with each other. A reduction gear 18 is rotatably supported by one end of an intermediate rotary shaft 15 via a bearing 17, and the reduction gear 18 is driven by the drive gear 1 of the crankshaft 14.
It is in mesh with 9.

A reduction gear 18 is provided on the intermediate rotary shaft 15.
A friction clutch device 20 is attached adjacent to the friction clutch device 20, and when the friction clutch device 20 is connected, the rotation of the crankshaft 14 is transmitted to the intermediate rotation shaft 15 via the drive gear 19 and the reduction gear 18. It Then, the rotation of the intermediate rotating shaft 15 is transmitted to the output shaft 16 after being selectively decelerated by the speed change gear mechanism 21 in a plurality of stages. Further, the rotation of the output shaft 16 is transmitted to the drive shaft 23 in the rear arm 6 via the bevel gears 22, 22, and the drive shaft 23 drives the rear wheel 7.

Next, the detailed structure of the friction clutch device 20 will be described with reference to FIGS. The friction clutch device 20 is provided with a clutch outer 30 having a substantially cylindrical shape, and the clutch outer 30 is coaxially fixed to one end surface of the reduction gear 18 by a rivet 31 so that the crank shaft 1
It is rotated in conjunction with 4. A disc spring 32 is provided between the reduction gear 18 and the clutch outer 30, and the damper spring 34 of the reduction gear 18 is formed by the clutch outer 30 and the support plate 33 provided on the other end surface of the reduction gear 18.
Is held. The bearing 17 of the reduction gear 18 is attached via a support 35, and an oil passage 36 is formed in the support 35 so as to communicate with the bearing 17. An oil passage 37 is formed in the rotary shaft 15,
Lubricating oil is guided from the oil passage 37 of the rotating shaft 15 to the bearing 17 through the oil passage 36 to lubricate and cool the bearing 17.

An intermediate rotary shaft 1 is provided in the clutch outer 30.
A clutch center 38 connected to 5 is accommodated relatively rotatably. Clutch outer 30 and clutch center 3
8, a plurality of power source side clutch plates 39 and drive system side clutch plates 40 are alternately stacked. The power source side clutch plate 39 is attached to the clutch outer 30.
The drive system side clutch plates 40 are arranged in the clutch center 38 so as to be movable only in the rotational axis direction, and power is transmitted by the frictional force generated between the clutch plates 39 and 40.

A one-way clutch 41 is interposed between the intermediate rotary shaft 15 and the clutch center 38, and an inner race 42 of the one-way clutch 41 is spline-engaged with the rotary shaft 15 and tightened and fixed by a nut 43. And then rotate together. A clutch center 38 is attached to the outer race 44 of the one-way clutch 41, and a groove 38a is formed at a predetermined position on the joint surface side of the clutch center 38 with the outer race 44. An oil passage 45 is formed. As described above, since the oil passage 45 is formed by joining the clutch center 38 and the outer race 44, it is possible to easily form the groove 38a at any position in the circumferential direction of the clutch center 38 by casting. Therefore, the oil passage 45 for cooling the power system side clutch plate 39 and the drive system side clutch plate 40 can be easily set. Lubricating oil from the oil passage 45 is guided from an oil passage 46 formed in the clutch center 38 to the power system side clutch plate 39 and the drive system side clutch plate 40 for cooling.

A mounting bolt 49 penetrates the outer race 44 of the one-way clutch 41 through a collar 48 through a recess 47a of a pressure plate 47 having a substantially disk shape, and the mounting bolt 49 is screwed to the outer race 44. Fixed. A clutch spring 51 is interposed between the locking plate 50 locked to the head of the mounting bolt 49 and the recess 47a of the pressure plate 47, and the clutch spring 51 constantly urges the pressure plate 47 in the clutch connecting direction. There is.

As described above, the mounting bolt 49 is screwed to the outer race 44 through the collar 48 through the pressure plate 47, and the locking plate 50 and the pressure plate 47 which are locked to the head of the mounting bolt 49. Since the clutch spring 51 is interposed between the recess 47a and the recess 48a, the length of the collar 48 can be selected and the mounting bolt 49 can be screwed to assemble the clutch spring 51. It is possible to easily adjust the mounting height variation.

Further, the outer race 44 of the one-way clutch 41 serves both as a mounting portion for the clutch center 38 and a mounting bolt 49 for holding the clutch spring 51, which can reduce the number of components and improve the precision of the components. Easy to manage.

The pressure plate 47 has a release 52.
The release 52 is located at one end of the intermediate rotary shaft 15 and is movable in the axial direction of the rotary shaft 15. The tooth 52a of the release 52 meshes with the tooth 55a of an operating shaft 55 that is rotatably provided on the clutch cover 53 via a bearing 54. The rotation of the operating shaft 55 causes the release 52 to move in the rotational axis direction. By operating the release 52, the clutch is disengaged. A bearing 56 is provided between the collar portion 52b of the release 52 and the pressure plate 47, and the pressure plate 47 rotates together with the clutch center 38.

A plurality of rollers 57 are provided between the inner race 42 and the outer race 44 of the one-way clutch 41 with a predetermined angle axis L2 inclined with respect to the rotation axis direction L1. The rollers 57 are held by an annular holder 58. Has been done. A tangent angle θ between the roller 57 and the outer race 44 is set as shown in FIG. As a result, the power from the power source side does not cause the rollers 57 to roll, and the power is transmitted from the clutch center 38 side to the rotary shaft 15 side. On the other hand, a reverse load is applied from the rotary shaft 15 side, and when the reverse load exceeds a predetermined level, The roller 57 rolls and the inner race 42 rotates with respect to the outer race 44 so as to absorb a reverse load of a predetermined amount or more.

A bearing 60 is interposed between the washer 59 fitted to the inner race 42 and the outer race 44, and a clutch pressure disc spring 61 is provided between the collar portion 42a of the inner race 42 and the washer 59. It is provided. The clutch pressure disc spring 61 constantly urges the outer race 44 in the clutch direction, and the reverse load absorbed by the spring force of the clutch pressure disc spring 61 is set.
The clutch pressure disc spring 61 includes a flange portion 42 a formed by extending the inner race 42 into a flange shape and the outer race 4.
4 is assembled with the washer 59 and the bearing 60, the mounting space is secured by the inner race 42, and the degree of freedom in setting the clutch pressure disc spring 61 is high. Further, the clutch pressure disc spring 61 biases the bearing 60 in the outer race 44 direction via the washer 59, and the roller 57 rolls and the inner race 42 rotates together with the rotating shaft 15 to absorb a reverse load larger than a predetermined value. Even at this time, the washer 59 does not rotate, so that wear is reduced.

The inner race 42 has a bearing 60 and a roller 5
7, an oil passage 62 is formed so as to communicate with 7, and lubricating oil is guided from the oil passage 63 formed in the rotary shaft 15 to the bearing 60 and the roller 57 via the oil passage 62.
And the rollers 57 are lubricated and cooled.

According to this structure, normally, the power source side clutch plate 39 and the drive system side clutch plate 40 are pressure-bonded to each other by the clutch spring 51, and the clutch center 38 and the intermediate rotary shaft 15 are connected. Since a one-way clutch 41 that allows power transmission from the clutch outer 30 side is provided in the engine, the rotational force transmitted from the crankshaft 14 to the clutch outer 30 is applied to the power source side clutch plate 39 and the drive system side clutch plate. 40, the outer race 44 of the one-way clutch 41, the roller 57, and the inner race 42 to be transmitted to the intermediate rotating shaft 15. In this state, when a force that attempts to rotate the roller 57 is applied by the rotational force of the outer race 44 of the one-way clutch 41, a clutch component force in the direction of arrow A is generated in the outer race 44, which presses the roller 57 against the inner race 42. Therefore, the roller 57 does not roll and power is transmitted.

By the way, in this state, an excessive reverse load acts from the intermediate rotary shaft 15 side due to, for example, abrupt engine braking, and when a reverse load more than a predetermined value is applied, the rotating force of the rotary shaft 15 will rotate the roller 57. The force to act on. Therefore, a rolling component force in the direction of arrow B is generated in the outer race 44, which causes the roller 57 to roll,
This rolling absorbs and relieves the reverse load. For this reason,
When a reverse load is applied, the rotational force (load) is transmitted from the inner race 42 side to the outer race 44 side in a reduced state. Therefore, the reverse load from the intermediate rotary shaft 15 is not transmitted to the crankshaft 14 side as it is. Corner, speed change gear mechanism 21
It is possible to prevent adverse effects on the engine 2 side.

In this way, the one-way clutch 41 is interposed between the rotary shaft 15 and the clutch center 38, and the power from the rotary shaft does not cause the roller 57 of the one-way clutch 41 to roll, and the power is applied to the clutch center 38. In this state, the engine brake applies a reverse load from the rotating shaft 15 side, but when the reverse load exceeds a predetermined value, the rollers 57 are prevented from rolling and exerting an excessive reverse load. Further, the inner race 42 of the one-way clutch 41 is fixed to the rotary shaft 15, and the clutch center 38 is attached to the outer race 44, so that a path for power transmission from the power source side and a path for absorbing an excessive reverse load are provided. This is the same, which reduces the number of parts, simplifies the structure, and facilitates accuracy control of clutch component parts.

Further, when a reverse load is applied, since the roller 57 causes a rotational differential by rolling from the inner race 42 side to the outer race 44 side, the rotational force is larger than that which causes a slip between the contact surfaces. The (load) is transmitted in a reduced state, and wear and seizure of the one-way clutch 41 can be reduced.

[0031]

As described above, the invention according to claim 1 is
With the power from the power source side, the one-way clutch roller does not roll and transmits the power to the rotating shaft side, and in this state, an excessive reverse load acts from the rotating shaft side due to sudden engine braking,
When the reverse load exceeds a predetermined value, it is possible to prevent the roller from rolling and exerting an excessive reverse load.

Further, the inner race of the one-way clutch is fixed to the rotary shaft, and the clutch center is attached to the outer race so that the path for transmitting power from the drive source side and the path for absorbing an excessive reverse load are the same. Therefore, the number of parts is reduced, the structure is simple, and the accuracy control of the clutch constituent parts is easy.

According to the second aspect of the present invention, the mounting bolt is screwed into the outer race through the collar through the pressure plate, and the clutch spring is interposed between the head of the mounting bolt and the pressure plate. By selecting the length of the collar and screwing the mounting bolts and assembling, it is possible to easily adjust the variation of the mounting height of the clutch spring due to the tolerance of the clutch component integration.

[Brief description of drawings]

FIG. 1 is a side view of a motorcycle.

FIG. 2 is a partially cutaway plan view of the engine.

FIG. 3 is a sectional view of a friction clutch device.

FIG. 4 is a perspective view of a roller and a holder of the one-way clutch.

[Explanation of symbols]

 15 rotary shaft 20 friction clutch device 30 clutch outer 38 clutch center 39 power source side clutch plate 40 drive system side clutch plate 41 one-way clutch 42 inner race 44 outer race 47 pressure plate 57 roller

Claims (2)

[Claims] 1. A clutch center provided on the clutch outer, which is relatively rotatably provided with a clutch center connected to the drive system side and integrally rotating with a rotating shaft, in a clutch outer connected to the power source side. , The drive system side clutch plates provided in the clutch center are alternately stacked so as to be movable in the rotation axis direction, and both clutch plates are pressed by the operation of the pressure plate, and the friction force generated between these clutch plates is applied. In a friction clutch device for transmitting power, a one-way clutch is interposed between the rotating shaft and the clutch center, an inner race of the one-way clutch is fixed to the rotating shaft, and the clutch is attached to an outer race of the one-way clutch. A center is attached, and a roller is arranged between the inner race and the outer race with a predetermined angle axis inclined with respect to the rotation axis direction. The power from the clutch center side transmits the power to the rotating shaft side without rolling the rollers, while a reverse load is applied from the rotating shaft side, and when the reverse load exceeds a predetermined value, the rollers roll to the outer race. Is configured to rotate with respect to the inner race and absorb a reverse load of a predetermined amount or more. 2. A mounting bolt is screwed through the pressure plate to the outer race through the pressure plate,
The friction clutch device according to claim 1, wherein a clutch spring is interposed between the head of the mounting bolt and the pressure plate, and the clutch plate constantly urges the pressure plate in the clutch connecting direction.