JP2019049343A - Clutch operation device of motorcycle - Google Patents

Abstract

To perform rotation assisting by an assisting spring from the starting of a clutch lever operation, in an assisting device using a spring for reducing operational force of a clutch of a motor cycle.SOLUTION: A clutch wire is connected to one end of an auxiliary lever to make the other end of the auxiliary lever be a movable end of an assisting spring. If a clutch lever for connecting/disconnecting is operated, first, a movable end center of the assisting spring at the other end of the auxiliary lever expands and moves than a moving distance of the clutch lever by the auxiliary lever, and the assisting spring assists an actuation lever to a rotation side. Then, by operating the clutch lever, the auxiliary lever integrally rotates with the actuation lever to connect/disconnect a clutch.SELECTED DRAWING: Figure 2

Description

Detailed Description of the Invention

  The present invention relates to a clutch operating device for a motorcycle in which power is connected and disconnected using a clutch wire by operation of a clutch lever.

  In a motorcycle, a friction clutch is used, and power is switched on and off by manually operating a clutch lever provided on the steering wheel. However, the clutch is used to increase the frictional force as the engine exhausts. The spring load of the vehicle is increased, and the load of the clutch lever is also increased, so the driver's fatigue is increased in situations such as getting on and off the city and requiring frequent clutch operations.

  Therefore, it is known to provide a spring assisting device for reducing the operating force in the release mechanism of the clutch. (For example, refer to the following patent documents 1 and 2 and 3)

  The clutch operating device disclosed in Patent Document 1 is arranged such that a line connecting the other end of the auxiliary spring locked to the rotating end of the clutch operating arm passes through the rotation center of the clutch operating arm when the clutch is connected. When the key is operated, the turning end of the auxiliary spring is separated from the turning center of the clutch operation arm to generate a force for turning the clutch operation arm.

  In the clutch operating device disclosed in Patent Document 2, an assisting spring is provided between the operating lever and the fixed end on the engine side, and when the clutch is not operated, the moving end of the assisting spring serves as the operating lever rotation fulcrum and the fixed end. It is located near the connecting neutral line, and generates a force to turn the operating lever so that the moving end of the assisting spring is largely separated from the neutral line connecting the operating lever rotation fulcrum and the fixed end when the clutch is operated. ing.

  In the clutch operating device disclosed in Patent Document 3, the auxiliary spring that applies a rotational force in the clutch operating rotational direction of the first rotating plate accelerates by a gear so that an assisting force is applied early from the start of the clutch operating. The assist force is inverted and applied by the rotation of the second rotation plate, and a canceling spring is used to offset the reverse assist force at the beginning of the operation.

Patent Publication Sho 61-57497 Patent No. 3282043 Patent No. 5297654

  In the clutch operating device, at the initial position of the clutch operating arm or the operating lever, the rotational end of the auxiliary spring is disposed at the center of a line connecting the rotational center of the clutch operating arm or the operating lever and the fixed end; In order to be placed on the side, high accuracy is required for mounting, and in the initial stage of clutch operation, there is a disadvantage such as a reduction effect of the operating force by the auxiliary spring or a complicated configuration. .

  The present invention has been made in view of such a point, and the purpose of the present invention is to perform the rotational assistance of the actuating lever by the auxiliary spring effectively from the start of the clutch operation and to lighten the clutch lever operation. It is to be able to do things with a simple configuration.

  The clutch operating device according to the invention of claim 1 is an assisting device using a spring to reduce the operating force of the clutch, and a clutch wire is connected to one end of the auxiliary lever rotatably attached to the actuating lever. When the clutch lever is connected to the clutch lever provided on the steering wheel, the other end of the auxiliary lever is the movable end of the assisting spring, and the clutch lever is operated to engage and disengage the clutch, the auxiliary lever starts with the auxiliary lever other than the movement distance of the clutch wire The center of the movable end of the assisting spring is expanded and moved so that the assisting spring assists the actuating lever to pivot, and then the actuating lever is integrally pivoted with the actuating lever by the operation of the clutch lever so that the clutch is engaged or disengaged It has become.

  According to the present invention, at the initial stage of operation of the clutch lever, the amount of movement of the auxiliary lever is expanded by a small amount of movement of the inner wire to move one end of the auxiliary spring from the reverse rotation side to the rotation side. From the start of the operation of the lever, it is possible to reliably perform the rotation assist of the actuating lever by the auxiliary spring.

  According to the second aspect of the invention, one end of the magnifying lever pivotally attached to the actuating lever is used as the movable end of the assisting spring, and the movement of the movable end of the magnifying lever is enlarged by the auxiliary lever.

  According to the invention, at the initial stage of operation of the clutch lever, the amount of movement of the inner wire is increased by the auxiliary lever and the expanding lever so that one end of the auxiliary spring is moved from the reverse rotation side to the rotation side. As a result, it is possible to perform a large turning assist of the actuating lever by the auxiliary spring from the start of the operation of the clutch lever.

  The invention according to claim 3 is that in the release mechanism for operating the clutch by converting the rotation of the clutch operation lever to axial movement, the auxiliary lever is arranged outside the clutch operation lever. is there.

  According to the above configuration, the clutch operating device can be arranged in a small space and can be easily assembled.

  According to a fourth aspect of the present invention, in the release mechanism in which the release axle is rotated by the clutch actuation lever for clutch operation, the clutch actuation lever and the auxiliary lever are disposed at the outer end of the release axle.

  According to the above configuration, since the protrusion of the release mechanism to the outside can be reduced, the assembly can be facilitated without touching the driver's legs at the time of getting on the vehicle.

  As described above, according to the present invention, the rotation assisting force can be assisted by the assisting spring at the initial stage of the operation of the clutch lever. It is possible to effectively reduce the operation load up to the state of

  Hereinafter, an embodiment of the first embodiment of the present invention will be described based on the drawings.

  A motorcycle 1 shown in FIG. 1 has a front fork 3 supported at the front end of a frame 2, a front wheel 4 fixed at the lower end of the front fork 3, and a steering handle 5 attached at the upper end. An engine 6 is mounted on the frame 2, and a clutch wire 8 is connected from a clutch lever 7 provided on the steering handle, and a release mechanism stored in a cover 9 is provided inside the engine 6 by a release mechanism (not shown). It is designed to connect and disconnect. A wet multi-plate clutch is pressurized by a strong load spring because it transmits power by friction.

  The clutch release mechanism 10 shown in FIG. 2 is in a state in which power is connected to the clutch when the clutch lever is not operated. The end of the inner wire 8 a of the clutch wire 8 is rotatably attached to the auxiliary lever 13 by a pin 12 via a joint 11. One end of the auxiliary lever 13 is rotatably attached to the actuating lever 15 by a pin 14 and the other end is rotatably attached to a spring receiving rod 17 by a pin 16 and the spring receiving rod 17 is slidable with the spring receiving tube 18 The auxiliary spring 19 is attached between the two, and is rotatably attached to the engine case by a bolt 20 that locks the spring receiving tube 18. Therefore, the assisting spring 19 can be expanded and contracted straightly while generating a compressive load. Reference numeral 21 denotes a return spring, which brings the end face of the auxiliary lever 13 into contact with the stopper portion 15a of the actuating lever 15. Further, on the opposite side of the stopper portion 15a, a stopper portion 15b similar to the stopper portion 15a is provided with a gap from the auxiliary lever 13.

  As shown in FIG. 3, the actuating lever 15 is attached to a pivot cam 24 of the ball cam 23 by a nut 22 and pivots integrally. The center of the actuating lever 15 and the center of the pivot cam 24 are identical. The cam surface of the pivot cam 24 is in contact with the cam surface of the fixed cam 26 via the ball 25. Therefore, when the actuating lever 15 pivots counterclockwise, the pivot cam 24 integrally pivots to move the ball 25. The rotary cam 24 is moved rightward by the cam surface, and the push rod 28 is pushed against the clutch pressure load by the adjusting screw 27 attached to the rotary cam 24 to cut off the clutch and the power is cut off. It has become. The configuration of this ball cam is general.

  Here, as shown in FIG. 2, the center W of the pin 16 for attaching the assisting spring 19 to the actuating lever 15 is on the left side of the neutral line L connecting the center Z of the actuating lever 15 and the center Y of the bolt 20 in FIG. The compression force by the assisting spring 19 urges the actuating lever 15 in the reverse direction as a moment to turn the actuating lever 15 in the clockwise direction, the rotational cam 24 is positioned at the bottom of the cam surface, and the clutch lever is not operated. That is, the state of transmitting power is maintained.

  FIG. 4 shows the state where the operation of the clutch lever 7 has started to be started. The inner wire 8a is pulled to the left side, and the auxiliary lever 13 rotates against the return spring 21 and abuts against the stopper portion 15b of the actuating lever 15. Here, since the distance from the center X of the pin 14 to the center W of the pin 16 which is the movable end is longer than the distance from the center X of the pin 14 in the auxiliary lever 13 to the center of the pin 12, In this movement, the center W of the pin 16 is enlarged and moved, and the auxiliary lever 13 abuts on the stopper portion 15 b and is on the right side of the neutral line L. Therefore, the compression force by the assisting spring 19 creates a moment for pivoting the actuating lever 15 in the counterclockwise direction. That is, by the slight movement of the inner wire 8a at the beginning of the clutch lever operation, the turning moment by the assisting spring is moved from the reverse turning side to the turning side, and the turning aid by the assisting spring 19 is performed. . The operating force of the clutch lever 7 is assisted by the assisting spring 19 so that it can be lightly operated since the state of FIG.

  Furthermore, the state which operated the clutch lever 7 is FIG. The inner wire 8a is further pulled, the actuating lever 15 is pivoted counterclockwise, and the push rod 28 is pushed by the rightward movement of the rotation cam 24 so that the clutch is disconnected, that is, the power transmission is interrupted. It will be With the auxiliary lever 13 in contact with the stopper 15b of the actuating lever 15, the center W of the pin 16 is largely separated from the center Z of the ball cam 23, and the assisting force by the assisting spring 19 acts largely. The assisting spring 19 extends, but the moment can be increased by setting the spring constant to be small, and the operating force of the clutch lever 7 can be greatly reduced. Therefore, the load when holding the clutch lever while holding the clutch lever can be reduced.

  When the clutch lever is gradually released and the clutch is engaged, the rotary cam 24 of the ball cam 23 is returned through the push rod 28 by the clutch spring load and returns to the state of FIG. 5 to FIG. At this time, the actuating lever 19 is turned counterclockwise by the assisting spring 19, but when the clutch lever is released further, the frictional force of the pin 16 and the like by the assisting spring 19 is overcome by the return spring 21 to watch the assisting lever 13 It is rotated in the direction to abut against the stopper portion 15a to return to FIG. 2 and the clutch is completely engaged.

  As described above, in the present invention, in the initial stage of operation of the clutch lever, the amount of movement of the auxiliary lever is enlarged by a small amount of movement of the inner wire, and the turning moment by the auxiliary spring is moved from the reverse turning side to the turning side In this way, since the assisting effect by the assisting spring is obtained before the clutch spring load acts, a series of operation loads are effectively reduced from the beginning of the turning in the clutch lever operation to the state of holding and holding The driver's fatigue can be reduced. Further, since the amount of movement of the inner wire required for the movement of the auxiliary lever at the initial stage of operation is small, there is no uncomfortable feeling that the play becomes large in the operation of the clutch lever.

  Furthermore, according to the present invention, since the auxiliary lever and the assisting spring are disposed outside the actuating lever, the actuating spring can be attached after the actuating lever is attached and fixed to the rotating cam. Since the assisting spring can be contracted by holding the jig between the receiving rod and the spring receiving tube, the mounting is easy and the jig can be easily removed, so that the assembling workability is improved.

  Next, a second embodiment of the present invention will be described.

  The release mechanism is disposed at the same place as in the first embodiment, and the release mechanism 50 shown in FIGS. 6 and 7 is in a state where the clutch does not operate the clutch lever and power is connected. The end of the inner wire 8 a of the clutch wire 8 is rotatably attached to the auxiliary lever 53 by a pin 12 via a joint 11. One end of the auxiliary lever 53 is rotatably attached to the actuating lever 55 by a pin 54 and the other end is in contact with the magnifying lever 56. The enlargement lever 56 is pivotally attached at one end to the actuating lever 55 by a pin 57 and the other end pivotally mounts the spring receiving rod 59 by a pin 58, and the spring receiving rod 59 and the slidable spring receiving tube 60 The assisting spring 61 is mounted between them and rotatably mounted on the engine case by a bolt 62 for locking the spring receiving tube 60. (A part of the spring receiving rod 59 and the auxiliary spring 61 is omitted in FIG. 6 to avoid overlapping of the drawings). Therefore, the assisting spring 61 can be expanded and contracted straight while generating a compressive load. Reference numeral 63 denotes a return spring, which brings the end face of the auxiliary lever 53 into contact with the stopper portion 55a of the operation lever 55 via the enlargement lever 56. Further, on the opposite side of the stopper portion 55a, a stopper portion 55b similar to the stopper portion 55a is provided with a gap from the magnifying lever 56.

  As shown in FIG. 7, the actuating lever 55 is attached to the push screw 64 by the nut 22 and integrally pivots. The center of the actuating lever 55 and the center of the push screw 64 are identical. An angular screw 64 a is provided on the outer periphery of the push screw 64, and a stopper 65 is integrally provided on the push screw 64 at an end. When the actuating lever 55 pivots counterclockwise, the push screw 64 is moved rightward by the angular screw 64a, and the adjusting screw 66 attached to the push screw 64 pushes the push rod 67 against the clutch pressure load to push the clutch It is turned off and the power is cut off.

  Here, the center W of the pin 58 for attaching the assisting spring 61 to the expanding lever 56 is on the left side of the neutral line L connecting the center Z of the actuating lever 55 and the center Y of the bolt 62 in FIG. The force is biased to the reverse rotation side as a moment to turn the actuating lever 55 clockwise via the auxiliary lever 53, and the stopper 65 of the push screw 64 is abutted against the engine case and the clutch lever is not operated. The state, ie, the state of transmitting power is maintained.

  FIG. 8 shows a state where the operation of the clutch lever has started to be started. The inner wire 8a is pulled to the left, the auxiliary lever 53 is rotated, and the other end presses the magnifying lever 56 against the return spring 63 to abut the stopper portion 55b of the actuating lever 55. Here, the distance from the center X of the pin 54 to the other end of the auxiliary lever 53 is longer than the distance from the center X of the pin 54 in the auxiliary lever 53 to the center of the pin 12 The center W of the pin 58 of the magnifying lever 56 which is the movable end is greatly enlarged and moved by the slight movement of the inner wire 8a so as to be on the right side of the neutral line L. Therefore, the compression force by the assisting spring 61 produces a moment for pivoting the actuating lever 55 in the counterclockwise direction. That is, by the slight movement of the inner wire 8a at the initial stage starting the clutch lever operation, the turning moment by the auxiliary spring is moved from the reverse turning side to the turning side, and the turning assist by the assisting spring 61 is performed. . The operating force of the clutch lever 7 is assisted by the assisting spring 61 and can be lightly operated since the state of FIG.

  Furthermore, the state which operated the clutch lever 7 is FIG. The inner wire 8a is further pulled, the actuating lever 55 is pivoted counterclockwise, and the push rod 64 is pushed by the rightward movement of the push screw 64, so that the clutch is disengaged, that is, the power transmission is interrupted. It becomes a state. With the auxiliary lever 53 in contact with the stopper 55b of the actuating lever 55, the center W of the pin 58 is largely separated from the center Z of the push screw 64, and the assisting force by the assisting spring 61 acts largely. The assisting spring 61 extends, but the moment can be increased by setting the spring constant to be small, and the operating force of the clutch lever 7 can be greatly reduced. Therefore, the load when holding the clutch lever while holding the clutch lever can be reduced.

  When the clutch lever is gradually released and the clutch is engaged, the push screw 64 is returned through the push rod 67 by the clutch spring load and returns to the state of FIG. 9 to FIG. At this time, the operation lever 55 is turned counterclockwise by the assisting spring 61, but when the clutch lever is further released, the return spring 63 overcomes the frictional force of the pins 57, 58 and the like by the assisting spring 61 to enlarge the lever 56. Is turned clockwise to abut against the stopper portion 55a to return to FIG. 6 in which the clutch is completely connected.

  As described above, in the second embodiment of the present invention, the amount of movement of the auxiliary lever is enlarged by a small amount of movement of the inner wire in the initial operation of the clutch lever, and the turning moment by the assisting spring is reversely rotated by the enlarging lever. Since it was made to move a large amount from the side to the rotating side, an assisting effect by the assisting spring can be obtained before the operation of actually disengaging the clutch. A series of operation loads can be effectively reduced to the holding state, and driver's fatigue can be reduced. Therefore, although it is possible to use an inexpensive push screw with a simple configuration, it goes without saying that a method using a ball cam may be adopted. The arrangement of the assisting springs can also be arranged on the lower side as in the first embodiment, and can cope with space constraints. In addition, since the amount of movement of the inner wire required for the movement of the assisting lever at the initial stage of operation is small, there is no discomfort that the play becomes large in the operation of the clutch lever.

  Furthermore, in the present invention, since the auxiliary lever and the magnifying lever are disposed outside the actuating lever and the assisting spring is disposed outside the actuating lever, the actuating lever can be attached after being fixed to the rotating cam. In addition, since the support spring can be contracted by holding the jig between the spring receiving rod and the spring receiving tube from the outside during assembly, the installation is easy and the jig can be easily removed, so that the assembling operation is easy. improves.

  Next, a third embodiment of the present invention will be described.

  In a motorcycle 101 shown in FIG. 10, a front fork 103 is supported at the front end of a frame 102, a front wheel 104 is fixed at the lower end of the front fork 103, and a steering handle 105 is attached at the upper end. An engine 106 is mounted on the frame 102, and a clutch wire 108 is connected from a clutch lever 107 provided on the steering handle, and a release mechanism attached to the clutch cover 109 is provided on the inside of the clutch cover 109. It is designed to connect and disconnect the A wet multi-plate clutch is pressurized by a strong load spring because it transmits power by friction.

  The release mechanism 110 shown in FIG. 11 is in a state where the clutch does not operate and the clutch is connecting power. The end of the inner wire 108 a of the clutch wire 108 is rotatably attached to the auxiliary lever 113 by a pin 112 via a joint 111. The L-shaped auxiliary lever 113 is pivotally mounted on the release axle 115 integrally with the magnifying lever portion 114, and a spring receiving tube 117 is pivotally attached to the end of the magnifying lever portion 114 by a pin 116. An assist spring 119 is mounted between the tube 117 and the slidable spring receiving rod 118. A spring receiving rod 118 is rotatably attached to the fixed plate 121 by a pin 120 and is attached to the clutch cover 109 by a bolt 122 and a detent pin 123 of the fixed plate 121. Therefore, the assisting spring 119 can expand and contract straight while generating a compressive load. Reference numeral 124 denotes a return spring, which brings the end face of the enlarged lever portion 114 into contact with the stopper portion 125 a of the actuating lever 125. Further, on the opposite side of the stopper portion 125a, a stopper portion 125b similar to the stopper portion 125a is provided with a gap from the enlarged lever portion 114.

  As shown in FIG. 12, the bosses of the actuating levers 125 are serrated to the release axle 115 and rotate integrally. An auxiliary lever 113 is pivotally supported by the release axle 115, and the center of the auxiliary lever 113 and the center of the actuating lever 125 are the same as the center of the release axle 115. The release axle 115 is axially supported by the bearings 126 and 127, and when the actuating lever 125 is rotated clockwise in FIG. 11, the pinion 115a disengages the clutch against the clutch pressure load via a rack (not shown), Is supposed to be cut off. The configuration of the release system using this pinion and rack is general.

  Here, the center W of the pin 116 which is a movable end for attaching the assisting spring 119 to the magnifying lever portion 114 in FIG. 11 is above the neutral line L connecting the center Z of the operating lever 113 and the center Y of the pin 120 in the figure. Since the compression force by the assisting spring 119 is a moment that causes the actuating lever 125 to pivot counterclockwise through the stopper portion 125a by the expanding lever portion 114, the release axle 115 is urged in the reverse rotational direction to drive the clutch lever. It is in a non-operational state, that is, in a state of transmitting power. Since the actuating lever 125 is serrated, an angular deviation within one peak with the release axle 115 occurs at the time of mounting, and the position of the center W of the pin 116 varies. Therefore, it is possible to make adjustment so that the center Y of the pin 120 can move about the locking pin 123 by making the mounting bolt hole of the fixing plate 121 a long hole.

  FIG. 13 shows a state where the operation of the clutch lever has started to be started. The inner wire 108a is pulled to the right and the auxiliary lever 113 is rotated against the return spring 124, and the enlarged lever portion 114 is in contact with the stopper portion 125b of the actuating lever 125. Here, since the distance from the center W of the pin 116 to the center Z of the auxiliary lever 113 is longer than the distance from the center X of the pin 112 to the center Z of the auxiliary lever 113, the slight movement of the inner wire 108a makes the center of the pin 116 W is expanded and moved, and the enlarged lever portion 114 abuts on the stopper portion 125 b and is below the neutral line L. Therefore, the compression force by the assisting spring 119 is a moment that causes the actuating lever 125 to rotate clockwise by the expanding lever portion 114 via the stopper portion 125b, and biases the release axle 115 toward the rotational side. That is, by the slight movement of the inner wire 108a at the beginning of the clutch operation, the turning moment by the auxiliary spring is moved from the reverse turning side to the turning side, and the turning assist by the assisting spring 119 is performed. Since the state shown in FIG. 13 is where the actuating lever 125 is turned and the clutch spring is started to be disengaged from the clutch spring, the operating force of the clutch lever 107 is assisted by the assisting spring 119 and can be lightly operated.

  Furthermore, the state which operated the clutch lever 7 is FIG. The inner wire 108a is further pulled, the auxiliary lever 113 is rotated, the actuating lever 125 is rotated clockwise by the enlarged lever portion 114, the release axle 115 is rotated, and a clutch is added via a rack (not shown) by the pinion 115a. The clutch is disengaged against the pressure load, and the power transmission is interrupted. With the enlarged lever portion 114 in contact with the stopper portion 125b, the center W of the pin 116 is largely separated from the neutral line L, and the assisting force of the assisting spring 119 acts largely. Although the assisting spring 119 extends, the moment can be increased by setting the spring constant to be small and the operation force of the clutch lever 107 can be greatly reduced. Therefore, the load when holding the clutch lever while holding the clutch lever can be reduced.

  When the clutch lever is gradually released and the clutch is engaged, the release axle 115 is rotated by the clutch spring load via the pinion 115a, and the auxiliary lever 113 is returned from the enlargement lever portion 114 by the stopper portion 125b of the actuating lever 125. It returns to the state of FIG. 14 from FIG. At this time, the operation lever 125 is urged clockwise by the assisting spring 119, but when the clutch lever is released further, the frictional force of the pin 120 and the like by the assisting spring 119 is overcome by the return spring 124 and the auxiliary lever 113 is counter clocked. It is rotated in the direction to abut against the stopper portion 125a to return to FIG. 11 and the clutch is completely connected.

  As described above, in the present invention, in the initial stage of operation of the clutch lever, the amount of movement of the auxiliary lever is enlarged by a small amount of movement of the inner wire, and the turning moment by the assisting spring is moved from the reverse turning side to the turning side As a result, an assisting effect is obtained by the assisting spring before the operation of actually disengaging the clutch. Therefore, a series of operation loads are effectively performed from the beginning of gripping in clutch lever operation to the state of gripping and holding This can reduce the driver's fatigue. Further, since the amount of movement of the inner wire required for the movement of the auxiliary lever at the initial stage of operation is small, there is no uncomfortable feeling that the play becomes large in the operation of the clutch lever.

  Furthermore, according to the present invention, since the auxiliary lever and the assisting spring are disposed outside the actuating lever, after the actuating lever is attached and fixed to the release axle, the auxiliaries and the auxiliary spring are attached. Since the assisting spring can be contracted by holding the jig between it and the pipe, the attachment is easy, and the jig can be easily removed, so that the assembling workability is improved. In addition, since the auxiliary lever is formed in a V-shape, there is no possibility of touching the driver's leg which can be disposed without the projection of the clutch cover to the outside.

  Next, a fourth embodiment of the present invention will be described.

  The release mechanism is disposed at the same place as the third embodiment, and the release mechanism 150 shown in FIGS. 15 and 16 is in a state where the clutch is connecting power, not operating the clutch lever. The end of the inner wire 108 a of the clutch wire 108 is rotatably attached to the auxiliary lever 153 by a pin 112 via a joint 111. The auxiliary lever 153 is rotatably attached to the release axle 155, and the other end 153 a is in contact with the magnifying lever 154. The magnifying lever 154 is rotatably attached to the actuating lever 165 by a pin 156, and one end thereof is in contact with the auxiliary lever 153a and the other end is provided with a fixed pin 157. The actuating lever 165 is serrated to the release axle 155 to fix the pin 156 at one end, the other end abuts the expanding lever 154 on the stopper portion 165a, and a gap with the expanding lever 154 on the opposite side of the stopper portion 165a A stopper portion 165b similar to the stopper portion 165a is provided. Reference numeral 158 denotes a return spring, which causes the magnifying lever 154 to abut on the stopper portion 165a.

  A fixed plate 160 is attached to the clutch cover 109 by a bolt 161 and a locking pin 162, and a pin 163 is fixed to the fixed plate 160. An assisting spring 159 is stretched between the pin 157 and the pin 163. (A part of the spring is omitted in Fig. 15 to avoid overlapping of the figures)

  As shown in FIG. 16, the enlargement lever 154 is disposed on the upper portion of the actuating lever 165 which is serrated to the release axle 155 so as to integrally rotate, and the auxiliary lever 153 is pivotally supported on the release axle 155 on the upper portion thereof. The center of the auxiliary lever 153 and the center of the actuating lever 165 and the center of the release axle 155 are identical. Since the enlargement lever 154 is pivotally supported by the pin 156, the boss 154 of the auxiliary lever 153 is avoided so that the enlargement lever 154 is pivoted, and a relief 154a is provided in an oval. The release axle 155 is pivotally supported by bearings 167 and bearings 168, and when the actuating lever 165 is rotated clockwise in FIG. 15, the clutch 155 is released against the clutch pressure load via the rack (not shown) by the pinion 155a. Is supposed to be cut off. The configuration of the release system using this pinion and rack is general.

  Here, in FIG. 15, the rotation center Z of the actuating lever 165 is more than a line L connecting the center W of the pin 157, which is the movable end over the assisting spring 159, and the center Y of the pin 163, which is the fixed end. Since it is on the upper side, the tensile force by the assisting spring 159 is a moment that causes the actuating lever 165 to rotate counterclockwise via the stopper portion 165 a by the expanding lever 154 and urges the release axle 155 in the reverse rotational direction. Is maintained, that is, in a state of transmitting power. In addition, since the actuating lever 125 is serrated, an angular deviation within one peak with the release axle 155 occurs at the time of mounting, and the position of the center W of the pin 1576 varies. Therefore, it is possible to make adjustment so that the center Y of the pin 163 can be moved around the locking pin 162 by making the mounting bolt hole of the fixing plate 160 a long hole.

  FIG. 17 shows the state where the operation of the clutch lever has started to be started. The inner wire 108a is pulled to the right and the auxiliary lever 153 is rotated against the return spring 158, and the enlargement lever 154 is in contact with the stopper portion 165b of the operation lever 165. Here, the distance P from the center Z of the auxiliary lever 153 to the contact portion 153a of the auxiliary lever 153 is longer than the distance Q from the rotation center of the expansion lever 154 to the contact portion 153a of the auxiliary lever 153. With a slight movement of the wire 108a, the center W of the pin 157 is expanded and moved so that the enlargement lever 154 abuts on the stopper portion 165b, and the center Z of the auxiliary lever 153 is below the neutral line L. Therefore, the tensile force by the assisting spring 159 is a moment that causes the operating lever 165 to rotate clockwise by the expanding lever 154 via the stopper portion 165 b, and the release axle 155 is biased toward the rotational side. That is, by the slight movement of the inner wire 108a at the initial stage of starting the clutch operation, the turning moment by the assisting spring is moved from the reverse turning side to the turning side, and the turning aid by the assisting spring 159 is performed. The operating force of the clutch lever 107 is assisted by the assisting spring 159 and can be lightly operated since the state of FIG.

  Furthermore, the state which operated the clutch lever 7 is FIG. The inner wire 108a is further pulled, the auxiliary lever 153 is rotated, the actuating lever 165 is rotated clockwise by the expanding lever 154, the release axle 155 is rotated, and clutch pressure is applied via a rack (not shown) by the pinion 155a. The clutch is disengaged against the load, and the power transmission is cut off. With the enlargement lever 154 in contact with the stopper portion 165 b, the center Z of the auxiliary lever 153 is largely separated from the neutral line L, and the assisting force of the assisting spring 159 acts largely on the actuating lever 165. Although the length of the assisting spring 159 is shortened, the moment can be increased by setting the spring constant to be small and the operation force of the clutch lever 107 can be greatly reduced. Therefore, the load when holding the clutch lever while holding the clutch lever can be reduced.

  When the clutch lever is gradually released and the clutch is engaged, the release axle 155 is rotated by the clutch spring load via the pinion 155a, and the auxiliary lever 153 is returned from the enlargement lever 154 by the stopper portion 165b of the operation lever 165. It returns to the state of FIG. 17 to FIG. At this time, the operating lever 125 is urged clockwise by the assisting spring 159, but when the clutch lever is further released, the assisting spring 159 overcomes the frictional force of the pin 156 etc. by the assisting spring 159 and counteracts the auxiliary lever 153. It is rotated in the direction to abut against the stopper portion 165a to return to FIG. 15 and the clutch is completely engaged.

  As described above, in the present invention, at the initial stage of operation of the clutch lever, the amount of movement of the auxiliary lever is enlarged by a small amount of movement of the inner wire, and the turning moment by the assisting spring is further turned by the expanding lever from the reverse turning side Since it was made to move largely to the side, the assist effect by the assist spring is obtained before the operation to actually release the clutch, so a series of operations from the beginning of grip in clutch lever operation to the state of holding and holding The load can be effectively reduced and the driver's fatigue can be reduced. Further, since the amount of movement of the inner wire required for the movement of the auxiliary lever at the initial stage of operation is small, there is no uncomfortable feeling that the play becomes large in the operation of the clutch lever.

  Furthermore, in the present invention, since the auxiliary lever and the assisting spring are disposed outside the actuating lever, the actuating lever is attached and fixed to the release axle and then assembled. After that, the assisting spring is attached. improves. The assisting spring can be easily configured for the tension spring and can be simply hooked. In addition, since the auxiliary lever can be made compact, it is compact in appearance, and there is no protrusion to the outside of the clutch cover, so it does not touch the driver's leg.

(Other embodiments)
In the first embodiment and the second embodiment, although the push rod is applied to the clutch of the type that pushes the clutch to the right to release the clutch, the clutch of the type provided with the operating device outside the clutch of FIG. It may apply to Further, it is also possible to dispose the clutch operating device of the third embodiment and the fourth embodiment on the side shown in the first embodiment and the second embodiment.

  Although the pinions are used in the release axles of the third and fourth embodiments, the invention can also be applied to a type in which a part of the axle shaft is cut out to operate as a cam.

  As described above, the present invention is useful for a motorcycle provided with a clutch operating device that reduces the operating force of the friction clutch.

FIG. 6 is a perspective view showing a partial state in which the fuel tank of the motorcycle in which the clutch operating device is opposite to the clutch is removed. It is a side view of the clutch operating device in the state which is not operating the clutch in 1st Example. It is sectional drawing of the clutch operating device in 1st Example. FIG. 7 is a side view of the clutch operating device in a state in which the operation of the clutch in the first embodiment is started. It is a side view of a clutch operating device in the state where the clutch in a 1st example was operated. It is the side view which abbreviate | omitted the clutch operating device of the state which is not operating the clutch in 2nd Example. It is sectional drawing of the clutch operating device in 2nd Example. It is the side view which carried out partial omission of the clutch operating device of the state which started operation of the clutch in 2nd Example. It is a side view of the clutch operating device of the state which operated the clutch in 2nd Example. FIG. 6 is a perspective view showing a partial state in which the fuel tank of the motorcycle in which the clutch operating device is on the clutch side is removed. It is a top view of the clutch operating device of the state which is not operating the clutch in 3rd Example. It is sectional drawing of the clutch operating device in 3rd Example. It is a top view of the clutch operating device of the state which started operation of the clutch in 3rd Example. It is a top view of the clutch operating device of the state which operated the clutch in 3rd Example. It is the top view which partially abbreviate | omitted the clutch operating device of the state which is not operating the clutch in 4th Example. It is sectional drawing of the clutch operating device in 4th Example. It is the top view which partially abbreviate | omitted the clutch operating device of the state which started operation of the clutch in 4th Example. It is a top view of the clutch operating device of the state which operated the clutch in 4th Example.

DESCRIPTION OF SYMBOLS 1 motorcycle 8 clutch wire 10 clutch release mechanism 13 auxiliary lever 15 operating lever 19 auxiliary spring 50 clutch release mechanism 53 auxiliary lever 55 operating lever 56 enlargement lever 61 auxiliary spring 101 motorcycle 108 clutch wire 110 clutch release mechanism 113 auxiliary lever 125 operating Lever 119 Helping spring 150 Clutch release mechanism 153 Auxiliary lever 154 Magnifying lever 165 Operating lever 159 Helping spring

Claims (4)

  An assist device using a spring to reduce the operating force of the clutch, and a clutch wire is connected to one end of the auxiliary lever rotatably mounted on the actuating lever and connected to the clutch lever provided on the handle. When the other end is the movable end of the assisting spring and the clutch lever is operated to disconnect the clutch, the auxiliary lever first enlarges the movable end center of the assisting spring at the other end of the moving distance of the clutch wire and assists A clutch operating device for a motorcycle, wherein the spring assists the actuating lever to rotate, and then the auxiliary lever rotates integrally with the actuating lever by the operation of the clutch lever to engage and disengage the clutch.   2. A clutch operating device for a motorcycle according to claim 1, wherein one end of the magnifying lever pivotally attached to the actuating lever is a movable end of the assisting spring, and movement of the movable end of the magnifying lever is magnified by the auxiliary lever.   The clutch according to claim 1 or 2, wherein in the release mechanism for operating the clutch by converting the rotation of the actuating lever into axial movement, the auxiliary lever is disposed outside the clutch actuating lever. Operating device.   The clutch operating device for a motorcycle according to claim 1 or 2, wherein a clutch operating lever and an auxiliary lever are disposed at an outer end of the release axle in a release mechanism that rotates the release axle by the operating lever and performs clutch operation. .

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