JP4595075B2 - Clutch operating mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a clutch operation mechanism for reducing the operation force of a clutch pedal in a vehicle.
[0002]
[Prior art]
Conventionally, in a vehicle, a clutch mechanism is provided between the engine and the transmission in order to intermittently rotate the rotational driving force of the engine at the time of starting the engine or shifting. This clutch mechanism is intermittently operated by transmitting a clutch operating force via an operation cable or the like by manual operation of a clutch lever or depression of a clutch pedal. At this time, the lever principle and the like are adopted for the clutch lever and the clutch pedal, and the operation load is reduced by increasing the lever ratio.
[0003]
In addition, a vacuum pump (vacuum pump) generates a negative pressure as a booster to reduce the operating force of the clutch lever and clutch pedal so that the clutch mechanism can be intermittently operated with a light operating load. A vacuum clutch booster that boosts by using a booster, a compressed air clutch booster that operates a clutch booster using compressed air, and the like are known.
[0004]
[Problems to be solved by the invention]
However, vacuum clutch boosters, compressed air clutch boosters, etc. are not only compatible with clutch mechanisms that employ an operating cable that transmits clutch operating force via an operating cable. It is difficult to retrofit this device, and in order to retrofit it, it is necessary to recreate a large number of related equipment, requiring a lot of labor and time, and increasing the cost. In the clutch mechanism employing the operation cable, the operation force of the clutch lever and the clutch pedal is reduced by taking the lever ratio, but the clutch operation force cannot be significantly reduced. In particular, when traveling on a mountain road with many curves or slopes or traveling in a traffic jam, the gear shifting operation must be frequently performed, and the clutch lever must be operated each time. However, when the lever operation of the clutch lever is frequently performed, the clutch operation force cannot be sufficiently reduced only by the lever ratio, and when the lever ratio is increased, the stroke of the clutch operation is increased and the operability is deteriorated.
[0005]
[Means for Solving the Problems]
The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.
[0006]
In claim 1, In a clutch operation mechanism for operating a clutch provided in a vehicle, a gas as an operation force assisting member for the clutch pedal (2) is provided between the clutch pedal (2) and a pedal mounting frame (13) on the vehicle side. A spring (50) is interposed, and a support arm (40) is provided between the pedal mounting frame (13) and the gas spring (50), and the pedal is provided at the front and rear of the support arm (40). A screw hole (41, 42) for screwing in the mounting frame (13) is drilled, and a pivot (51) for supporting the upper end of the gas spring (50) is provided in the approximate center in side view. The front end portion of the support arm (40) protrudes forward from the front screwing hole (41), and constitutes a fitted portion (44) of a tool (57) manually operated on the front end portion, Clutch support for clutch pedal (2) The upper end of the gas spring (50) and the support arm (40) between the pivot portion to (11) and the pivot portion (52) of the lower end of the gas spring (50) and the clutch pedal (2). The pivot pedal (51) is arranged, and the clutch pedal (2) is configured to be "turned off" beyond the pivot point (51) at the other end. Is.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the invention will be described.
[0008]
FIG. 1 is a left side view showing a clutch operation mechanism according to the present invention, and FIG. 2 is a left side view showing a clutch operation of the clutch pedal.
[0009]
3 is a disassembled view of an existing clutch operating mechanism before retrofitting the clutch operating mechanism according to the present invention, FIG. 4 is a left side view of a pedal mounting frame of the clutch operating mechanism according to the present invention, and FIG. It is the left view which attached the fulcrum stay and the fulcrum arm.
[0010]
6 is a left side view in which the clutch pedal and the push rod are similarly attached, FIG. 7 is a left side view in which the gas spring is similarly attached, FIG. 8 is a front view in which the gas spring is similarly attached, and FIG. It is a left side view.
[0011]
FIG. 10 is a view showing a clutch operating mechanism, and FIGS. 11 and 12 are views showing a diaphragm spring type clutch.
[0012]
First, features of the clutch operation mechanism according to the present invention will be described. As shown in FIG. 1, a clutch operating mechanism for operating a travel drive clutch 7 of a traveling vehicle is attached to a clutch mounting frame 13 provided in an operation section of the traveling vehicle, and a boss 24 of a clutch pedal 2 as a clutch operating tool is provided. The clutch pivot shaft 11 laid horizontally on the clutch mounting frame 13 is fitted so as to be rotatable in the front-rear direction.
[0013]
As shown in FIG. 10, the clutch operating mechanism is a hydraulic operating mechanism, and the clutch pedal 2 is connected to the clutch master cylinder 6 so that the pedal force of the clutch pedal 2 is hydraulically transferred from the clutch master cylinder 6 to the release cylinder 92. It is a mechanism that pushes the release fork 94 and engages / disengages the clutch 7. The clutch master cylinder 6 includes a reserve tank 90 and a cylinder body, and generates hydraulic pressure that operates the release cylinder 92 in response to the depression force of the clutch pedal 2. The release cylinder 92 receives the hydraulic pressure generated in the clutch master cylinder 6 and moves the release fork 94 with the force pushed in the order of the piston 74 → the rod 75 to disconnect the clutch 7.
[0014]
Therefore, a sufficient hydraulic pressure to slide the release fork 94 against the diaphragm spring clutch must be generated by the depression force of the clutch pedal 2, and a large depression operation load of the clutch pedal 2 is required. Therefore, in the present invention, the gas spring 50 is provided on the clutch pedal 2 as an operation force assisting member in order to reduce the stepping operation load of the clutch pedal 2. The gas spring 50 is rotatably supported at its upper end (one end) 51 on a fulcrum arm 40 fixed to the clutch mounting frame 13 side. Similarly, the lower end (the other end) 55a of the gas spring 50 is a clutch pedal. 2 is rotatably supported. In this embodiment, the gas spring 50 is disposed so that the rod 55 urged by the sealed gas pressure is regulated in the downward projecting speed, and the lower end 55a of the rod 55 is supported by the clutch pedal 2. .
[0015]
The clutch operation in the clutch operation mechanism configured as described above will be described. As shown in FIG. 2, normally, the clutch pedal 2 is held in a state of being rotated rearward, and the clutch 7 is “ON” (72). From this state, when the operator depresses the clutch pedal 2 and reaches the turning dead center 71 (a position where the axial center of the clutch pivot shaft 11 and the upper end 51 and the lower end 55a of the gas spring 50 are aligned), Thereafter, the clutch pedal 2 is urged to rotate forward by the elastic force of the contracted gas spring 50. Therefore, if the turning dead center 71 is exceeded, the stepping direction operation force is boosted (increased) by the gas spring 50, so that the stepping operation load is reduced.
[0016]
In the clutch 7 operated by the hydraulic operation mechanism, a force for returning the clutch pedal 2 is applied due to the structure. For example, in the diaphragm spring type clutch 7a shown in FIG. 11, when the clutch pedal 2 is not depressed, the tip of the diaphragm spring 95 pushes the pressure plate 97 to the left side in FIG. The pressure is pressed between the pressure plates 97, and the rotational power is transmitted in the order of flywheel 99 → clutch disc 98 → clutch shaft 39 by frictional force.
[0017]
Then, as shown in FIG. 12, when the clutch pedal 2 is depressed, the depression force of the clutch pedal 2 is transmitted from the clutch master cylinder 6 to the release cylinder 92 by hydraulic pressure, and the release fork 94 is pushed to release the release fork 94, the release bearing. Through 96, the diaphragm spring 95 is pushed leftward on the paper surface in FIG. Then, the diaphragm spring 95 pulls the pressure plate 97 rightward on the paper surface in FIG. 12 with the pivot ring 95a as a fulcrum, so that a clearance is formed on both sides of the clutch disk 98 and transmission of rotational power is cut off. When the depression of the clutch pedal 2 is stopped, the release fork 94 slides to the right in FIG. 12 by the elastic force of the diaphragm spring 95. That is, the force that returns the clutch pedal 2 is exerted by the elastic force of the diaphragm spring 95.
[0018]
Accordingly, although the clutch pedal 2 receives a force to rotate backward due to the elastic force of the diaphragm spring 95, when the clutch pedal 2 is in front of the rotational dead center 71, the gas spring 50 moves the clutch pedal 2 forward. Since it is urged to rotate, the operator's stepping operation load is reduced. However, the elastic force of the gas spring 2 is smaller than the elastic force of the diaphragm spring 95, and when the operator stops depressing the clutch pedal 2, the clutch pedal 2 starts to rotate backward.
[0019]
When the operator further depresses the clutch pedal 2 and the clutch pedal 2 rotates forward to the position (70) where the clutch 7 is “disengaged”, the pressing plate 26 provided on the clutch pedal 2 turns the safety switch 12 on. Then, the clutch pedal 2 comes into contact with a stopper bolt 16 provided on the traveling machine body, and its forward rotation is restricted. When the clutch pedal 2 is in the “disengaged” position (70) and the stepping operation is released, the clutch pedal 2 is moved backward until reaching the turning dead center 71 by the force of the diaphragm spring 95. Rotate.
[0020]
Then, when the rotation dead center 71 is exceeded, the elastic force that the gas spring 50 that has been contracted this time tries to extend is also applied, and the clutch pedal 2 is urged to rotate backward, so that the clutch 7 is “on”. The clutch pedal 2 is held at a position where it abuts against a stopper rubber (not shown) provided on the cylinder bracket 15. That is, the cylinder bracket 15 also serves as a stopper. As described above, in the clutch operating mechanism according to the present invention, the clutch pedal 2 is moved backward to the position (72) at which the clutch is "on" by the action of the diaphragm spring 95 and the gas spring 50 without specially providing a return spring. It is rotated and held. When the gas spring 50 is not provided, the clutch pedal 2 does not return only by the reaction force of the diaphragm spring 95, and the release bearing 96 remains in contact with the diaphragm spring 95, so a return spring is necessary. It becomes.
[0021]
Below, the structure of the said clutch pedal 2 which is a clutch operation tool of the clutch operation mechanism which concerns on this invention is demonstrated along the procedure in the case of retrofitting to the existing vehicle. Of course, the clutch operating mechanism according to the present invention can be attached to a new vehicle.
[0022]
First, the clutch pedal 2 attached to the existing vehicle shown in FIG. 1 is removed as shown in FIG. First, the yoke 61 provided at the front end of the push rod 62 protruding forward from the clutch master cylinder 6 is detached from the clutch pedal 2 by removing the pin 63 so that the clutch master cylinder 6 is not damaged. Remove push rod 62 and yoke 61 while attaching. Next, the screw members 25 and 25 are loosened and removed from the pedal pivot shaft 11 fitted and fixed to the pedal mounting frame 13, and the reinforcing plate 3 installed on the pedal pivot shaft 11 and the cylinder bracket 15 is removed. . Then, the retaining ring 17 is similarly removed from the pedal pivot shaft 11, and the clutch pedal 2 is extracted from the pedal pivot shaft 11 and removed.
[0023]
When the clutch pedal 2 attached to the existing vehicle is removed, as shown in FIG. 4, the pedal pivot shaft 11 protrudes from the side of the pedal attachment frame 13 to which the clutch pedal 2 is attached, and the push switch bracket. 14, the safety switch 12 is attached, and the clutch master cylinder 6 is attached to the cylinder bracket 15. Similarly, the pedal mounting frame 13 has a plurality of screw holes 31, 32, and 34, and a stopper bolt 16 is provided on the body frame at the front lower side of the pedal pivot shaft 11. The screw holes 31, 32, and 34 are provided in accordance with the shape of a fulcrum stay 45, which will be described later, so that the fulcrum stay 45 can be fixed satisfactorily. It is also provided at a place where the rear end can be fixed well. However, the position and number of the screw holes are not limited to the present embodiment.
[0024]
Next, as shown in FIG. 5, the fulcrum stay 45 and the fulcrum arm 40 are attached to the pedal attachment frame 13. The fulcrum stay 45 is screwed into the screwing holes 53, 32, 34 formed in the pedal mounting frame 13 in the screwing holes 32 positioned at the lowermost part and the screwing holes 31 positioned at the uppermost part. -It is screwed to the pedal mounting frame 13 through 54. The fulcrum stay 45 reinforces the pedal mounting frame 13 to increase rigidity, and the number of screw holes required for mounting the operation force assisting member according to the present invention to the existing pedal mounting frame 13 is insufficient. If the screw hole is not drilled at the required place, increase the appropriate screw hole for attaching the screw member, or provide the screw member on the vehicle frame side. Is possible. When the pedal mounting frame 13 has sufficient strength and sufficient screwing holes are secured, or when the pedal mounting frame 13 is previously provided with screwing holes for mounting on a new vehicle, etc. The fulcrum stay 45 can be omitted.
[0025]
The screw mounting hole 31 positioned at the uppermost part of the pedal mounting frame 13 has a screwing member 53 inserted through the screwing holes 48 and 42 formed in the rear upper part of the fulcrum stay 45 and the rear part of the fulcrum arm 40. At this time, the screw member 53 is not tightened but is temporarily fixed, and the fulcrum arm 40 is allowed to freely rotate. The fulcrum arm 40 has a plate-like shape that is gently refracted at a substantially central portion when viewed from the side, and has screw holes 41 and 42 for screwing into the pedal mounting frame 13 at the front and rear portions. A projection 43 for supporting the upper end of a gas spring 50 described later is provided at the approximate center in side view. The front end portion 44 of the fulcrum arm 40 protrudes forward from the front screwing hole 41 to form a parallel portion that is slightly narrower than the main body portion of the fulcrum arm 40. In addition, the front end portion 44 of the fulcrum arm 40 is formed in a shape that allows a tool such as a spanner to fit well, for example, in order to facilitate attachment work.
[0026]
Next, as shown in FIG. 6, the clutch pedal 2 is rotatably fitted to the pedal pivot shaft 11. In the clutch pedal 2, left and right frames 27L and 27R that extend downward are fixed to an annular boss 24 that is disposed transversely to the traveling direction, and the pedal 21 is attached to the ends of the frames 27L and 27R. The pedal 21 is provided with a pedal rubber 22 for preventing slipping. A plate 23 is fixed upward from the boss 24.
[0027]
Further, a pressing plate 26 for pressing the safety switch 12 is fixedly provided on the substantially central front side of the left and right frames 27L and 27R which are constituent members of the clutch pedal 2. When the clutch pedal 2 is stepped on, the safety switch 12 provided on the pedal mounting frame 13 is pressed by the pressing plate 26 so that the safety switch 12 is turned on and the engine can be started. Become. That is, when starting the engine, the safety switch 12 must be turned on by depressing the clutch pedal 2, and at this time, the clutch is in the "disengaged" state.
[0028]
Next, as shown in FIG. 6, the yoke 61 is attached to the yoke 61 through the pin 63 through the plate 23 and the yoke 61 projecting upward from the boss 24 of the clutch pedal 2. A push rod 62 for sliding the piston 69 in the cylinder 6 is attached. That is, the plate 23 on the clutch pedal 2 side and the push rod 62 for sliding the piston 69 of the clutch master cylinder 6 are connected by the yoke 61, and the push rod 62 and the clutch pedal 2 are interlocked. Accordingly, when the clutch pedal is stepped on and rotated forward, the plate 23 on the opposite side of the clutch pedal with respect to the pedal pivot shaft 11 rotates rearward, and the push rod 62 connected to the plate 23 moves rearward. The piston 69 in the clutch master cylinder 6 is pushed in.
[0029]
When attaching the push rod 62, fix the clutch pedal 2 by hand so that the clutch is positioned at the “on” position, adjust the length of the push rod 62, and adjust the play of the push rod 62. Thus, the “play” of the clutch pedal 2 is adjusted. Then, a retaining ring 17 is fitted on the pedal pivot shaft 11 to prevent the boss 24 of the clutch pedal 2 from coming off.
[0030]
Next, as shown in FIGS. 7 and 8, a gas spring 50 is attached. This clutch operation mechanism uses a gas spring 50 as a pedal effort assisting device for reducing the depression force of the clutch pedal 2 that is a clutch manipulation tool. The gas spring 50 does not need to obtain power from an electric motor or engine, and can be designed more compactly than a case where a compression spring is used as a stepping force assisting device. A large load can be taken out stably. Further, even when retrofitting to an existing vehicle as in this embodiment, it is not necessary to incorporate it into the transmission of the vehicle, so that the work is simple and the number of members required for retrofitting is small.
[0031]
The upper end of the gas spring 50 is rotatably attached to a protrusion 43 that protrudes laterally from the center of the fulcrum arm 40. Similarly, the lower end of the gas spring 50 is rotatably attached to the clutch pedal 2 by the projections 52 penetrating the left and right frames 27L and 27R of the clutch pedal 2 and the lower end 55a of the telescopic rod 55 of the gas spring 50. It is done. At this time, due to the elastic force of the gas spring 50, the fulcrum arm 40 rotates forward about the screw member 53 temporarily fixed to the pedal mounting frame 13.
[0032]
Next, as shown in FIG. 9, the fulcrum arm 40 is fixed to the pedal mounting frame 13. As described above, the fulcrum arm 40 is rotated upward by the elastic force of the gas spring 50 when the gas spring 50 is attached. Therefore, in order to adjust to an appropriate position, a tool 57 such as a spanner is hung on the front end portion 44 of the fulcrum arm 40, and the tool 57 is rotated downward to compress and compress the gas spring 50. The screw member 58 is passed through the screw holes 41, 47, and 34 provided in the stay 45 and the pedal mounting frame 13 and fastened.
[0033]
As described above, since the fulcrum arm 40 is biased to rotate forward by the gas spring 50, the screw member 58 must be attached at the same time while applying a force against the gas spring 50 to compress and compress the gas spring. However, since the urging force of the gas spring 50 is large, it cannot be easily reduced and attached. Therefore, the front end portion 44 of the fulcrum arm 40 has a shape to be fitted with a tool 57 such as a spanner, a wrench or a screwdriver as a fitted portion, so that the tool 57 is held in one hand using the tool 57. Thus, the fulcrum arm 40 is fixed, and the screw member 58 can be tightened with the other hand. Therefore, using the principle of the lever, the fulcrum arm 40 can be rotated by applying a force that is sufficiently counter to the gas spring 50 by the force of pushing down the tool 57 by hand. That is, a large force corresponding to the force of the gas spring 50 can be applied without using a special tool, so that it can be easily attached.
[0034]
The shape of the front end portion 44 is not limited. When a spanner, a monkey wrench, or the like is used, a shape having a parallel portion corresponding thereto is used, and when a handle such as a driver, pliers or hammer is used. Becomes a hole into which it can be inserted. Further, since the tool 57 is necessary at the time of assembling, it is not necessary to manufacture a special jig or the like for assembling.
[0035]
Then, the reinforcing plate 3 is installed on the pedal pivot shaft 11 and the cylinder bracket 15, and fixed to the screw coupling holes 33 provided on the end of the pedal pivot shaft 11 and the cylinder bracket 15 with screw members 25 and 25. When the clutch pedal 2 rotates and the push rod 62 slides the piston 69 of the clutch master cylinder 6, the clutch pivot shaft 11 and the cylinder bracket 15 receive the load applied to these operations. The distance between the pedal pivot shafts 11 is maintained, and the rigidity is enhanced so that the pedal mounting frame 13 is not distorted.
[0036]
Finally, the temporarily tightened screw member 53 is tightened, and the other screw members are also tightened. When the return springs are installed on the frames 27L and 27R of the clutch pedal 2 and the pedal mounting frame 13, the mounting of the clutch pedal 2 is completed. However, the return spring described above can be omitted as described above.
[0037]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
[0038]
As shown in claim 1 In a clutch operation mechanism for operating a clutch provided in a vehicle, a gas as an operation force assisting member for the clutch pedal (2) is provided between the clutch pedal (2) and a pedal mounting frame (13) on the vehicle side. A spring (50) is interposed, and a support arm (40) is provided between the pedal mounting frame (13) and the gas spring (50), and the pedal is provided at the front and rear of the support arm (40). A screw hole (41, 42) for screwing in the mounting frame (13) is drilled, and a pivot (51) for supporting the upper end of the gas spring (50) is provided in the approximate center in side view. The front end portion of the support arm (40) protrudes forward from the front screwing hole (41), and constitutes a fitted portion (44) of a tool (57) manually operated on the front end portion, Clutch support for clutch pedal (2) The upper end of the gas spring (50) and the support arm (40) between the pivot portion to (11) and the pivot portion (52) of the lower end of the gas spring (50) and the clutch pedal (2). The pivot pedal (51) is arranged, and the clutch pedal (2) is configured to be "turned off" beyond the pivot point (51) at the other end. Therefore, the operator can operate the clutch operating tool with a light stepping force, improving the driving feeling, and improving the operability because it is not necessary to increase the pedal stroke to reduce the stepping load. Therefore, fatigue for operating the clutch pedal can be reduced.
[0039]
Also Since the operation force assisting member is a gas spring, the operator can operate the clutch pedal, which is a clutch operating tool, with a light stepping operation load, and can be configured more compactly than when a compression spring is used. In addition, since a large load can be stably taken out over the entire depression stroke, the depression operation force of the clutch pedal can be reliably reduced. And by using a gas spring, compared with the case where a transmission or the like is provided with a device for reducing the treading force, the number of members can be reduced, and it can be easily attached. Moreover, since it does not expand and contract rapidly, the operation of the half-clutch or the like can be easily realized.
[0040]
Also Since the support arm is provided between the vehicle-side frame and the operation force assisting member, when the gas spring as the operation force assisting member is attached, the gas spring must be attached in a compressed state. By providing the arm, the gas spring can be pushed and shrunk using the lever principle, so that the mounting work is simplified.
[0041]
Also Since the fitted portion for fitting one end of the tool is provided at the end portion of the support arm, when assembling the operation force assisting member, the support arm is operated using a necessary tool when assembling a spanner or the like. Therefore, using the lever principle, the gas spring can be compressed and compressed with a force smaller than the elastic force of the spring serving as the operation force assisting member, so that a large force is not required for the mounting work and the work is simple. It becomes.
[0042]
Also The other end of the operation force assisting member is disposed between the one end of the operation force assisting member and the clutch operation tool, and the pivot support of the other end of the operation force assisting member. Since it is configured to operate “cut” beyond the dead center, the operating force assisting member acts as a return spring of the clutch operating tool, and the return spring can be omitted. The operating force can also be reduced. If the clutch operating tool is configured not to exceed the dead point, a return spring is required, and not only the reaction force of the diaphragm spring but also the reaction force against the return spring must be applied when the clutch pedal is depressed. This is a disadvantageous configuration for reducing the operation load.
[Brief description of the drawings]
FIG. 1 is a left side view of a clutch operating mechanism according to the present invention.
FIG. 2 is a left side view showing the clutch operation of the clutch pedal.
FIG. 3 is a disassembled view of an existing clutch operation mechanism before retrofitting a clutch operation mechanism according to the present invention.
FIG. 4 is a left side view of a pedal mounting frame of the clutch operating mechanism according to the present invention.
FIG. 5 is a left side view in which a fulcrum stay and a fulcrum arm are similarly attached.
FIG. 6 is a left side view in which a clutch pedal and a push rod are similarly attached.
FIG. 7 is a left side view in which a gas spring is similarly attached.
FIG. 8 is a front view in which a gas spring is similarly attached.
FIG. 9 is a left side view in which a fulcrum arm is similarly fixed.
FIG. 10 is a diagram showing a clutch operation mechanism.
FIG. 11 is a diagram showing a diaphragm spring type clutch.
FIG. 12 is a diagram showing a diaphragm spring type clutch.
[Explanation of symbols]
2 Clutch pedal (clutch operating tool)
7 Clutch
40 Support arm
44 Part to be fitted
45 Support stay
50 Gas spring (operation force auxiliary member)
57 tools

Claims (1)

In a clutch operation mechanism for operating a clutch provided in a vehicle, a gas as an operation force assisting member for the clutch pedal (2) is provided between the clutch pedal (2) and a pedal mounting frame (13) on the vehicle side. A spring (50) is interposed, and a support arm (40) is provided between the pedal mounting frame (13) and the gas spring (50), and the pedal is provided at the front and rear of the support arm (40). A screw hole (41, 42) for screwing in the mounting frame (13) is drilled, and a pivot (51) for supporting the upper end of the gas spring (50) is provided in the approximate center in side view. The front end portion of the support arm (40) protrudes forward from the front screwing hole (41), and constitutes a fitted portion (44) of a tool (57) manually operated on the front end portion, Clutch support for clutch pedal (2) The upper end of the gas spring (50) and the support arm (40) between the pivot portion to (11) and the pivot portion (52) of the lower end of the gas spring (50) and the clutch pedal (2). The clutch operating mechanism is configured such that the clutch pedal (2) is operated to "turn off" beyond the pivot point (51) at the other end .

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