JPH07132872A - Clutch lever operational load reducing structure - Google Patents

Abstract

PURPOSE:To set easily a turnover mechanism which is attached to a lever operated indirectly by the operation of a clutch lever to the lever and also readjust it easily according to the wear of friction plate and extension of a cable. CONSTITUTION:In an operational load reducing structure of a clutch lever in which a turnover mechanism 1 is provided on a lever 2 operated indirectly by the operation of the clutch lever, the turnover mechanism 1 is supported pivotally on the rotating shaft 3 of the lever 2 and fixed to the lever 2 so that a set angle can be adjusted freely.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for reducing the operation load of a clutch lever in a motorcycle or the like, and more particularly, a turnover mechanism is attached to a lever indirectly operated by operating the clutch lever. The present invention relates to an operation load reduction structure for reducing the operation load of the clutch lever.

[0002]

2. Description of the Related Art In a motorcycle of a motorcycle type, as a clutch for intermittently rotating an engine to a drive system, a wet multi-plate clutch is normally used in which a plurality of clutch disks and friction plates are contained in an oil-containing case. There is a hydraulic release mechanism for this clutch release mechanism, but in general, operating the clutch lever at hand will rotate the lever linked to the clutch via a wire for remote operation. Many types are used that move the clutch to turn it off.

In such a clutch release mechanism via a wire, a clutch having a stronger engaging force is used as the displacement of the engine increases, and therefore a turn by a spring is used to reduce the operation load. An operating load reduction structure that utilizes over may be attached.

As a structure for reducing the operation load attached to this clutch release mechanism, there has been conventionally known a structure in which a turnover mechanism using a spring is directly attached near the clutch lever. Since the work to install the spring of the over mechanism is troublesome and it is difficult to increase the assist force for reducing the operation load, it is said that the turnover mechanism will be attached to the portion of the axle push lever that works with the clutch. Things have been proposed in the past. (Japanese Patent Application No. 4-356853)

[0005]

By the way, in the operation load reducing structure in which the turnover mechanism is attached to the axle push lever as described above, it is possible to follow the position change of the axle push lever due to the abrasion of the friction plate of the clutch. That is, in order to prevent the clutch from slipping due to the turnover mechanism acting as a stopper of the axle push lever when the friction plate wears, the biasing member should be set in the direction of movement during operation rather than the dead point of turnover. While allowing it to be set in the opposite direction, the biasing member is set to the dead point of the turnover so that the turnover in the turning direction during operation occurs as quickly as possible to assist the lever operation efficiently. It is necessary to set it as close as possible.

However, in order to make the turnover mechanism follow the position change of the axle push lever, it is not appropriate that the set state is fixed from the beginning, so the turnover mechanism is initially set. Assuming that there is a degree of freedom in which the urging member can move in a direction opposite to the rotating direction during operation rather than the state, the biasing member will be in a constant state as close as possible to the dead point of its turnover during each assembling. As described above, it is necessary to make adjustments individually without variation, and the adjustment work during assembly becomes troublesome.

Further, when the friction plate is worn or the wire is stretched, it is necessary to readjust the set state of the turnover mechanism, but this readjustment work requires more skill and is troublesome. However, if this is not done, problems such as clutch slippage and increased lever operation load will occur.

The present invention is intended to eliminate the above-mentioned disadvantages of the prior art. More specifically, a turnover mechanism is provided for a lever indirectly operated by operating a clutch lever. (EN) Provided is a clutch lever operation load reducing structure which can be easily set and which can easily readjust the set angle of the lever and the turnover mechanism in response to abrasion of the friction plate and extension of the wire. The purpose is.

Further, the turnover mechanism can automatically adjust the position of the lever due to wear of the friction plate to some extent, and the adjustment work and the readjustment work at the time of assembling the clutch lever can be easily performed. It is intended to provide.

[0010]

SUMMARY OF THE INVENTION In order to solve the above problems and to achieve the object, the present invention is a clutch in which a turnover mechanism is attached to a lever that is indirectly actuated by operating a clutch lever. In the lever operation load reducing structure, a turnover mechanism is pivotally supported on a rotation shaft of the lever and is fixed to the lever so that a set angle can be adjusted.

Further, in such a clutch lever operation load reducing structure, a turnover mechanism is pivotally supported on a rotation shaft of the lever and is fixed to the lever so that a set angle can be adjusted freely. , One end of which is elastically urged by a spring so that one end of the urging member is pivotally attached to the connecting lever member and always extends, and the other end of the urging member is pivotally supported at a fixed position with respect to the engine. The connecting lever member and the urging member are provided in the vicinity of the pivotal connection portion so that the connecting lever member can be rotated by a certain range in the direction opposite to the moving direction at the time of operating the lever from the set position. It is characterized in that each of them is provided with a stopper facing each other with a space.

[0012]

[Operation] According to the above configuration, when the turnover mechanism is fixed to the lever that is indirectly operated by the operation of the clutch lever, the turnover mechanism is pivotally supported on the rotation axis of the lever. Then, by adjusting and fixing the set angle, the mounting work can be easily performed, and the readjustment work for changing the set angle can also be easily performed.

Further, since the turnover mechanism is composed of the connecting lever member, the urging member and the mounting member, and the connecting lever member and the urging member are provided with stoppers, respectively, the connecting lever member and the urging member are provided. By assembling the turnover mechanism between the lever and the engine with a jig of an appropriate thickness sandwiched between the stoppers, turnover occurs as quickly as possible during operation and the lever operation can be assisted efficiently. The connecting lever member fixed to the lever and the biasing member can always be set at a constant angle.

By removing the jig after mounting, a gap corresponding to the thickness of the jig is provided between the stoppers of the connecting lever member and the biasing member, so that the connecting lever member fixed to the lever is It is possible to rotate in the direction opposite to the moving direction during operation from the state set by the amount of the stopper interval to a certain range, and it is possible to follow the wear of the friction plate of the clutch by that amount. The degree of wear of the friction plate can be easily determined by observing the change in the interval between the stoppers.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A clutch lever operation load reducing structure of the present invention will be described below with reference to the drawings by an embodiment of an axle push lever in an outer pull type clutch.

1 and 2 show a state in which a turnover mechanism is attached to an axle push lever which is indirectly operated by operating a clutch lever. The axle push lever 2 is provided with a rack and a pinion. The lever main body is composed of a rotary shaft coupling portion 21 fixed to the rotary shaft 3 for pushing back the clutch spring by serration coupling, and a lever main body 22 integrally fixed to the rotary shaft coupling portion 21. A wire connecting portion 23 is fixed to a tip portion of the rivet 22 by a rivet 24. In order to attach the turnover mechanism 1, a step portion 21a is provided on the rotary shaft coupling portion 21 and a nut is attached to the lever body 22. A section 25 is provided.

The axle push lever 2 itself has a lever body 22 in which a step portion 21a is provided in a rotary shaft coupling portion 21.
Except that a nut portion 25 is provided on the engine, the shape and structure of the axle push lever are not different from those of the conventional axle push lever. As shown in FIGS. It is arranged in the same manner as the conventional one.

The turnover mechanism 1 attached to the axle push lever 2 is the axle push lever 2
The connecting lever member 11 that is integrally fixed so that the set angle can be adjusted, the elastic urging member 12 that is urged by a spring so as to always extend, and the end portion of the urging member 12 are And a mounting member 13 for pivotally supporting the same at a fixed position. One end of the biasing member 12 is pivotally connected to the connecting lever member 11 and the other end is pivotally connected to the mounting member 13.

The connecting lever member 11 includes a pivotal support portion 11a pivotally supported by a step portion 21a of a rotary shaft coupling portion 21 of the axle push lever 2, and a lever body of the axle push lever 2 extending from the pivotal support portion 11a to the axle push lever 2 side. The fixing portion 11b having a portion overlapping with 22 and the connecting portion 11c extending to the opposite side of the axle push lever 2 and pivotally attached to one end of the biasing member 12 at the rear end thereof are integrally formed.

The fixed portion 11b of the connecting lever member 11 includes:
A long hole 14 is provided in a portion of the axle push lever 2 that overlaps the lever body 22, and a bent portion 11d is formed in the middle of the connecting portion 11c in order to avoid the mount bolt portion 5 of the engine. Urging member 12
The stopper 1 of the urging member 12 is provided in the vicinity of the pivotally connecting portion 31 with
A stopper 15 that faces 6 is integrally formed.

The connecting lever member 11 is pivotally supported by the pivotally supporting portion 11a of the connecting lever member 11 on the stepped portion 21a of the rotary shaft connecting portion 21 of the axle push lever 2 to temporarily fix the connecting lever member 11 and the axle push member. After adjusting the set angle of the lever 2, by tightening and fixing the fixing portion 11b of the connecting lever member 11 to the lever body 22 of the axle push lever 2 by the flanged bolt 41 and the nut portion 25, the axle push lever 2 is integrated so that its set angle can be readjusted.

As shown in FIGS. 3 to 5, the urging member 12 has a fitting recess member 121 having a connecting portion 12a with the connecting lever member 11, and a connecting portion 12b with the mounting member 13.
And a spring 123 installed between the fitting concave member 121 and the fitting convex member 122. The distance between the connecting portion 12a and the connecting portion 12b is constantly extended by the spring 123. As shown in FIG. 6, the fitting convex member 122 is formed so as to be expandable and contractible so that the fitting convex member 122 does not come off from the fitting concave member 121.

The fitting concave member 121 and the fitting convex member 122 of the urging member 12 are integrally molded by using ultra-high molecular polyethylene as a material in order to reduce the sliding resistance at the fitting portions 121a and 122a of both members. The fitting recess 121a of the fitting recess 121 is provided with an air vent hole 121b, and the fitting projection 122 has a cover 122.
b is integrally formed, and the fitting recess member 121
Is connected to the connecting lever member 11 and the biasing member 12.
A stopper 16 facing the stopper 15 of the connecting lever member 11 is integrally formed in the vicinity of the connecting portion 12a.

Incidentally, the connecting lever member 11 and the urging member 12
Is arranged in series with the axle push lever 2, and the connecting lever member 11 and the urging member 12 are pivotally connected to each other by connecting the end portion of the connecting portion 11c and the connecting portion 12a with a pin 42. Is pivoted so as to be rotatable, and the connecting portion 12b and the pivotally supporting portion 13c are coupled by a pin 43 so that the biasing member 12 and the attachment member 13 are pivotally pivoted at the pivoting portion 32. .

The mounting member 13 has a pivotally supporting portion 13c for rotatably supporting the fixing portions 13a, 13b to the cover portion of the engine and the connecting portion 12b of the urging member 12, as shown in FIG.
As shown in FIG. 13, the transmission case cover portion 10 of the engine is fixed with bolts or the like by the fixing portions 13a and 13b. By using the mounting member 13, as shown in FIG. The biasing member 12
Even if it is rotated a little in the opposite direction from the set state, the contact line A of the parts arranged around it
There is no contact with.

In the turnover mechanism 1 including the above-mentioned members, the set angle of the connecting lever member 11 and the urging member 12 is set when the turnover mechanism 1 is assembled between the engine case cover portion and the axle push lever. Is its impact surface 1 as shown in FIG.
5a and a stopper 15 in which a wear limit mark 15b is displayed at a constant interval, and a stopper 16 in which an alignment mark portion 16b projecting forward is formed above the collision surface 16a thereof. It is done by always adjusting it to a constant value.

That is, the positional relationship between the alignment mark portion 16b of the stopper 16 and the stopper 15 is confirmed, and a turnover is performed with a jig having an appropriate thickness sandwiched between the collision surfaces 15a, 16a of the stoppers 15, 16. By assembling the mechanism, as shown in FIG. 9, the connecting lever member 11 and the biasing member 12 can be assembled so that the angle X is always constant at the time of setting.

In the turnover mechanism 1 set in this way, as shown in FIG. 7, the end portion of the axle push lever 2 is moved in the A direction via the wire by the operation of the clutch lever (not shown). By being pulled, the rotating shaft 3, the pivotally connecting portion 31, and the pivotally connecting portion 32 become substantially in a straight line at the time of a slight rotation from the set state, and the dead point state of the turnover by the biasing member 12 is reached. Will be located.

When the axle push lever 2 is further pulled in the direction A to rotate, and the pivot portion 31 deviates in the direction opposite to the direction A from the line connecting the centers of the rotation shaft 3 and the pivot portion 32,
A turnover occurs due to the spring force of the biasing member 12 extending in the B direction, and this acts as a force for rotating the connecting lever member 11 in the C direction, and pulls the axle push lever 2 in the A direction via a wire. This will assist the operation load of the clutch lever.

In the turnover mechanism 1 in the set state as described above, when the friction plate is worn and the positional relationship of the axle push lever 2 is changed, the connecting lever member 11 is operated in accordance with the change. As it is rotated in the opposite direction and the set angle with the biasing member 12 is shifted from X to Y as shown in FIG. 10, in that case, the shift is due to the wear limit mark 15b of the stopper 15.
Since it is objectively displayed by the alignment mark portion 16b of the stopper 16 and the user, it is possible to thoroughly inform the user of the time when the readjustment is required by a service manual or the like.

The turnover mechanism 1 as described above can be easily attached to the axle push lever 2 and the setting angle thereof can be changed, and the engine is constructed with the axle push lever 2, the connecting lever member 11 and the biasing member 12 in series. Since it is placed against the engine, it can be placed without protruding in the width direction of the engine and without contacting the contact lines of the parts placed around it, and can be installed in a compact state with respect to the engine. be able to.

The structure for reducing the operation load of the clutch lever according to the present invention has been described above with reference to the embodiment of the axle push lever which interlocks with the outer pull type clutch, but the present invention is limited to such an embodiment. The present invention is not limited to this, but can be applied to a lever that works in conjunction with an inner push type clutch.

[0033]

According to the operation load reducing structure of the clutch lever of the present invention as described above, the work of attaching the lever and the turnover mechanism which are indirectly operated by the operation of the clutch lever can be easily performed. Therefore, readjustment work for changing the set angle can be easily performed.

Further, in the case where the turnover mechanism has the connecting lever member and the biasing member each provided with a stopper, adjustment work of the turnover mechanism itself at the time of assembly can be easily performed, and abrasion of the friction plate can be dealt with. The readjustment work of the turnover mechanism itself to cope with abrasion of the friction plate and elongation of the wire becomes easy.

[Brief description of drawings]

FIG. 1 is a top view showing an embodiment of an operation load reducing structure of the present invention.

FIG. 2 is a partial cross-sectional side view of the embodiment shown in FIG.

FIG. 3 is a partial cross-sectional side view showing the vicinity of the biasing member of the embodiment shown in FIG.

FIG. 4 shows the biasing member of the embodiment shown in FIG. 1 (A).
The top view and (B) partial cross section top view.

5 shows the biasing member of the embodiment shown in FIG. 1 (A).
The side view and (B) longitudinal cross-sectional view.

6A is a compression state (a state at a turnover dead center) of the biasing member of the embodiment shown in FIG. 1, and FIG.
Explanatory drawing which shows an extended state (state after turnover).

FIG. 7 is a top view showing an operating state of the embodiment shown in FIG.

FIG. 8 is a side view (A) showing the vicinity of a pivotal connecting portion of a connecting lever member and a biasing member of the embodiment shown in FIG.
The principal part enlarged side view.

9 (A) is a top view showing the vicinity of a pivotally connecting portion of the connecting lever member and the biasing member in the set state of the embodiment shown in FIG. 1, and FIG.

10 (A) is a top view showing the vicinity of a pivotal attachment portion of a connecting lever member and a biasing member in a state where readjustment is required due to friction plate wear of the embodiment shown in FIG. 1; The principal part enlarged top view.

FIG. 11 is a side view showing an assembled state of the engine of the embodiment shown in FIG.

12 is a top view showing the relationship between the turnover mechanism and the contact lines of other components in the assembled state shown in FIG.

FIG. 13 is a side view showing an arrangement state of an axle push lever for attaching a turnover mechanism with respect to the engine.

FIG. 14 is a top view showing an arrangement state of an axle push lever for attaching a turnover mechanism with respect to the engine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 turnover mechanism 2 lever 11 connecting lever member 12 biasing member 13 mounting member 15 stopper 16 stopper 31 pivotal connection portion between the connecting lever member and the biasing member

Claims (2)

[Claims] 1. In a clutch lever operation load reduction structure in which a turnover mechanism is attached to a lever that is indirectly operated by operating the clutch lever, the turnover mechanism is pivotally supported on a rotation shaft of the lever. A structure for reducing the operation load of the clutch lever, which is fixed to the lever so that the set angle can be adjusted. 2. A turnover mechanism includes a connecting lever member pivotally supported on a rotary shaft of the lever and fixed to the lever so that a set angle can be adjusted. One end of the turnover mechanism is pivotally attached to the connecting lever member. The elastic biasing member is biased by a spring so as to extend, and a mounting member for pivotally supporting the other end of the biasing member with respect to the engine at a fixed position,
A space is provided between the connecting lever member and the biasing member in the vicinity of the pivotal portion so that the connecting lever member can be rotated by a certain range in the direction opposite to the moving direction when the lever is operated, rather than the set position. The clutch lever operation load reducing structure according to claim 1, wherein opposite stoppers are provided.