Modularized clutch slave cylinder device capable of preventing clutch friction plate from being excessively abraded

Abstract

The utility model relates to a modularized clutch slave cylinder device capable of preventing a clutch friction plate from being excessively abraded. The technical problem that the abrasion condition of a friction plate is visually checked in the prior art is solved. Comprising an engine flywheel and a clutch friction plate abutting against one side of the engine flywheel, a gearbox front shell is arranged on the side, away from the engine flywheel, of the clutch friction plate, and a clutch separation mechanism is arranged on the side, away from the engine flywheel, of the clutch friction plate. One side of the clutch separation mechanism acts on the clutch friction plate, and the other side of the clutch separation mechanism is linked with a clutch slave cylinder push rod of the clutch slave cylinder body through a separation shifting fork structure; the clutch slave cylinder push rod penetrates through the gearbox front shell and is provided with at least one of a stroke simple visual slave cylinder mechanism, a stroke limiting slave cylinder mechanism, a photoelectric prompt slave cylinder system mechanism and a stroke monitoring slave cylinder mechanism. The device has the advantages that the excessive abrasion problem of the clutch friction plate can be predicted in advance without disassembling the gearbox, and the operation is very convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of clutch slave cylinder equipment, and particularly relates to a modular clutch slave cylinder device for preventing excessive wear of a clutch friction plate. Background Art

[0002] During the process of driving a manual transmission vehicle, the clutch serves as a bridge for transmitting torque between the engine and the gearbox, and the clutch is used very frequently. As time goes by, the wear of the clutch friction plate becomes more and more serious. After the friction plate is worn excessively, the temperature in the clutch housing cavity rises sharply, resulting in frequent occurrence of broken separation fingers and damage to the transmission release bearing. Currently, for the wear condition of the clutch friction plate, it can only be visually inspected by disassembling the clutch during maintenance, and the driver can judge whether the clutch friction plate needs to be replaced by relying on personal experience to perceive phenomena such as vehicle slip and weakness during the acceleration process. However, the cost of disassembling the clutch is high, and due to insufficient personal experience, it is impossible to detect excessive wear of the clutch plate in advance, resulting in damage to the parts of the vehicle's power system and the inability of the whole vehicle to be used normally, increasing the cost of vehicle inoperability. Summary of the Invention

[0003] The purpose of the utility model is to solve the above problems and provide a modular clutch slave cylinder device for preventing excessive wear of a clutch friction plate.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions: A modular clutch slave cylinder device for preventing excessive wear of a clutch friction plate, including an engine flywheel and a clutch friction plate pressed against one side of the engine flywheel. A transmission front housing is arranged on the side of the clutch friction plate away from the engine flywheel. A clutch release mechanism is arranged on the side of the clutch friction plate away from the engine flywheel. One side of the clutch release mechanism acts on the clutch friction plate, and the other side is linked with the clutch slave cylinder push rod of the clutch slave cylinder body through a release fork structure. The clutch slave cylinder push rod passes through the transmission front housing, and at least one of a travel simple visualization slave cylinder mechanism, a travel limit slave cylinder mechanism, an optoelectronic prompt slave cylinder system mechanism, and a travel monitoring slave cylinder mechanism is arranged on the clutch slave cylinder push rod. It is extremely convenient to operate as it is possible to predict in advance the problem of excessive wear of the clutch friction plate without disassembling the transmission.

[0005] In the above modular clutch slave cylinder device for preventing excessive wear of a clutch friction plate, the travel simple visualization slave cylinder mechanism includes a travel pointer fixed on the clutch slave cylinder push rod by a threaded method. A scale fixing device with a scale is arranged at one end of the clutch slave cylinder body close to the clutch slave cylinder push rod, and the travel pointer corresponds to the scale. The design of the scale is convenient for maintenance personnel to visually judge whether the clutch friction plate needs to be replaced, reducing the disassembly and assembly costs.

[0006] In the above-mentioned modular clutch release cylinder device for preventing excessive wear of the clutch friction plate, the stroke limiting release cylinder mechanism includes a limiting block fixed to the clutch release cylinder push rod by a threaded manner. A through hole for the clutch release cylinder push rod to pass through is provided on the front housing of the gearbox, and the limiting block is located inside the front housing of the gearbox and abuts against one side of the through hole. When the clutch friction plate is not worn, there is a certain gap between the limiting block and the front housing of the transmission. When the clutch friction plate wears to the limit, the rear end of the limiting block just abuts against the front housing of the gearbox. If the clutch friction plate wears further, due to the limiting effect of the limiting block, the separating finger cannot press the clutch pressure plate against the clutch friction plate on the engine flywheel, resulting in the vehicle slipping and losing power during driving. The design of the limiting block can directly prevent the driver from excessively wearing the clutch friction plate, and force the clutch to slip after it reaches the wear limit, which reminds the driver to go for repair and replacement.

[0007] In the above-mentioned modular clutch release cylinder device for preventing excessive wear of the clutch friction plate, the photoelectric prompt release cylinder system mechanism includes a switch top block fixed to the clutch release cylinder push rod by a threaded manner. A switch fixing device with a switch is provided at one end of the clutch release cylinder body close to the clutch release cylinder push rod. One end of the switch contacts the switch top block, and the other end is connected to the instrument panel with an indicator light.

[0008] In the above-mentioned modular clutch release cylinder device for preventing excessive wear of the clutch friction plate, the lower end of the switch has a rigid ejector rod, and the rigid ejector rod abuts against the outer side surface of the switch top block. The outer side surface of the switch top block is inclined, and the width of the switch top block gradually decreases from the end close to the clutch release cylinder body to the end far from the clutch release cylinder body. When the clutch friction plate is not worn, the switch abuts against the high position of the switch top block and is in a compressed state, and the switch is in an off state. When the clutch friction plate wears to a certain extent, the clutch release cylinder push rod drives the switch top block to move backward for a certain distance, and the rigid ejector rod of the switch changes from a compressed state to a non-compressed state. At this time, the switch is in an on state, and at the same time, a connection signal is given to the instrument panel, that is, the indicator light lights up. When the warning light on the instrument panel is constantly on, it can directly remind the driver during driving.

[0009] In the above-mentioned modular clutch release cylinder device for preventing excessive wear of the clutch friction plate, the stroke monitoring release cylinder mechanism includes a thimble arranged on the clutch release cylinder push rod. A sensor fixing device with a position sensor is provided at one end of the clutch release cylinder body close to the clutch release cylinder push rod. One end of the position sensor cooperates with the thimble and the other end is connected to a voltmeter.

[0010] In the modular clutch slave cylinder device for preventing excessive wear of the clutch friction plate, one end of the ejector pin is fixed to the clutch slave cylinder push rod by means of a thread, and the other end of the ejector pin is bent and in contact with the position sensor. When the clutch friction plate is not worn, the rear end of the ejector pin is in contact with the position sensor without pressure. As the clutch friction plate is slowly worn, the ejector pin moves backward along with the clutch slave cylinder push rod, and the ejector pin applies increasing pressure to the position sensor. At the same time, the position sensor converts the pressure signal into the voltage value of the voltmeter. The visual voltmeter can accurately know the wear of the clutch friction plate, and can also provide a reliable basis for judging various faults in the clutch system.

[0011] In the above-mentioned modular clutch sub-pump device for preventing excessive wear of the clutch friction plate, an input shaft is provided in the engine flywheel, the clutch friction plate is movably arranged on the circumferential outside of the input shaft, and the clutch release mechanism has a release finger, and the release finger is arranged between the engine flywheel and the release fork structure.

[0012] In the above-mentioned modular clutch sub-cylinder device for preventing excessive wear of the clutch friction plate, a clutch cover is provided on the circumferential outer side of the separation finger, a clutch pressure plate is provided on the side of the separation finger away from the clutch cover, and the side of the clutch pressure plate away from the separation finger presses against the side of the clutch friction plate.

[0013] In the above-mentioned modular clutch slave cylinder device for preventing excessive wear of the clutch friction plate, the release fork structure includes a release fork, one end of which abuts against the front housing of the transmission and the other end is hingedly connected to the clutch slave cylinder push rod, and a transmission release bearing is provided in the middle of the release fork, which abuts against the end of the release finger away from the clutch cover.

[0014] Compared with the existing technology, the advantages of the utility model are:

[0015] 1. The device uses a modular clutch sub-cylinder device to prevent excessive wear of the clutch friction plate, which causes a sharp increase in the temperature of the clutch housing cavity, resulting in the breakage of the clutch release fingers and damage to the gearbox release bearing.

[0016] 2. The device adopts a modular design. According to the needs, at least one method can be selected from the simple visual slave pump mechanism, the travel limit slave pump mechanism, the photoelectric prompt slave pump system mechanism and the travel monitoring slave pump mechanism. A certain effect can be achieved by replacing some parts. In addition, the excessive wear of the clutch friction plate can be predicted in advance without disassembling the gearbox, and the operation is extremely convenient.

[0017] 3. The device uses a scale and travel pointer design to facilitate maintenance personnel to visually determine whether the clutch friction plate needs to be replaced, reducing disassembly and assembly costs.

[0018] 4. The device can directly prevent the driver from excessively wearing the clutch friction plate by using the design of the limit block. After it reaches the extreme wear point, it forces the clutch to slip, which reminds the driver to go for maintenance and replacement.

[0019] 5. The device can directly remind the driver during driving by using the indicator light on the dashboard that is always on.

[0020] 6. The device can accurately know the wear condition of the clutch plate by using the visual voltmeter, and can also provide a reliable basis for judging various fault problems of the clutch system. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the initial state of the first embodiment of the present utility model.

[0022] Figure 2 It is a schematic structural diagram of the worn state of the first embodiment of the present utility model.

[0023] Figure 3 It is a cross-sectional structural view of the clutch separation mechanism in the first embodiment of the present utility model.

[0024] Figure 4 It is a schematic structural diagram of the initial state of the second embodiment of the present utility model.

[0025] Figure 5 It is a schematic structural diagram of the worn state of the second embodiment of the present utility model.

[0026] Figure 6 It is a schematic structural diagram of the initial state of the third embodiment of the present utility model.

[0027] Figure 7 It is a schematic structural diagram of the worn state of the third embodiment of the present utility model.

[0028] Figure 8 It is a schematic structural diagram of the initial state of the fourth embodiment of the present utility model.

[0029] Figure 9 It is a schematic structural diagram of the worn state of the fourth embodiment of the present utility model.

[0030] In the figure: engine flywheel 1, clutch friction plate 11, front housing of the gearbox 12, through hole 13, input shaft 14, clutch release mechanism 2, release finger 21, clutch cover 22, clutch pressure plate 23, release fork structure 3, release fork 31, release bearing of the gearbox 32, body of the clutch slave cylinder 4, push rod of the clutch slave cylinder 41, simple visual travel slave cylinder mechanism 5, travel pointer 51, scale fixing device 52, scale 53, travel limit slave cylinder mechanism 6, limit block 61, photoelectric prompt slave cylinder system mechanism 7, switch top block 71, switch fixing device 72, switch 73, instrument panel 74, indicator light 75, rigid push rod 76, travel monitoring slave cylinder mechanism 8, ejector pin 81, sensor fixing device 82, position sensor 83, voltmeter 84. Detailed implementation mode

[0031] The following further elaborates on the present utility model in conjunction with the accompanying drawings and the detailed implementation mode.

[0032] As Figures 1 - 3 shown, a modular clutch slave cylinder device for preventing excessive wear of the clutch friction plate includes an engine flywheel 1 and a clutch friction plate 11 pressed against one side of the engine flywheel 1. On the side of the clutch friction plate 11 away from the engine flywheel 1, there is a front housing 12 of the gearbox. On the side of the clutch friction plate 11 away from the engine flywheel 1, there is a clutch release mechanism 2. One side of the clutch release mechanism 2 acts on the clutch friction plate 11, and the other side is linked to the push rod 41 of the clutch slave cylinder of the body of the clutch slave cylinder 4 through a release fork structure 3. The push rod 41 of the clutch slave cylinder passes through the front housing 12 of the gearbox, and at least one of a simple visual travel slave cylinder mechanism 5, a travel limit slave cylinder mechanism 6, a photoelectric prompt slave cylinder system mechanism 7, and a travel monitoring slave cylinder mechanism 8 is provided on the push rod 41 of the clutch slave cylinder. It is possible to predict in advance the problem of excessive wear of the clutch friction plate 11 without disassembling the gearbox, and the operation is extremely convenient.

[0033] Among them, the simple visual travel slave cylinder mechanism 5 includes a travel pointer 51 fixed to the push rod 41 of the clutch slave cylinder by a threaded method. At one end of the body of the clutch slave cylinder 4 close to the push rod 41 of the clutch slave cylinder, there is a scale fixing device 52 with a scale 53, and the travel pointer 51 corresponds to the scale 53. The design of the scale 53 facilitates maintenance personnel to visually judge whether it is necessary to replace the clutch friction plate 11, reducing disassembly and assembly costs.

[0034] Specifically, an input shaft 14 is provided inside the engine flywheel 1. The clutch friction plate 11 is movably arranged on the circumferential outer side of the input shaft 14. The clutch release mechanism 2 has a release finger 21, and the release finger 21 is arranged between the engine flywheel 1 and the release fork structure 3.

[0035] Further, a clutch cover 22 is provided on the circumferentially outer side of the separating finger member 21. A clutch pressure plate 23 is provided on the side of the separating finger member 21 away from the clutch cover 22, and the side of the clutch pressure plate 23 away from the separating finger member 21 presses against one side of the clutch friction plate 11.

[0036] Furthermore, the separating fork structure 3 includes a separating fork 31. One end of the separating fork 31 abuts against the front housing 12 of the gearbox, and the other end is hinged to the clutch slave cylinder push rod 41. A gearbox release bearing 32 that abuts against the end of the separating finger member 21 away from the clutch cover 22 is provided in the middle of the separating fork 31.

[0037] The principle of this embodiment is as follows:

[0038] Step on the clutch pedal to control the clutch slave cylinder body 4. The movement of the clutch slave cylinder push rod 41 drives the separating fork 31. The separating fork 31 is connected to the clutch release mechanism 2 through the gearbox release bearing 32. The clutch release mechanism 2 is in contact with the clutch friction plate 11. When the clutch friction plate 11 is not worn, the travel pointer 51 points to the initial zero position of the scale 53. When the clutch slave cylinder push rod 41 retracts, the retraction stroke is visually confirmed by the distance that the travel pointer 51 moves on the scale 53. In this way, the problem of excessive wear of the clutch friction plate 11 can be predicted in advance without disassembling the gearbox, and the operation is extremely convenient.

[0039] Embodiment Two

[0040] Combined with Figure 4 and Figure 5 As shown, the principle and the implementation steps of this embodiment are similar to those of Embodiment One. The difference lies in that: in Embodiment One, the wear degree of the clutch friction plate 11 is detected by the travel pointer 51 and the scale 53. In this embodiment, the stroke limiting slave cylinder mechanism 6 includes a limiting block 61 fixed to the clutch slave cylinder push rod 41 by a threaded manner. A through hole 13 for the clutch slave cylinder push rod 41 to pass through is provided on the front housing 12 of the gearbox, and the limiting block 61 is located inside the front housing 12 of the gearbox and abuts against one side of the through hole 13. When the clutch friction plate 11 is not worn excessively, there is a certain gap between the limiting block 61 and the front housing 12 of the transmission. When the clutch friction plate 11 wears to the limit, the rear end of the limiting block 61 just abuts against the front housing 12 of the gearbox. If the clutch friction plate 11 wears further, due to the limiting effect of the limiting block 61, the gearbox release bearing 32 cannot move to the right, and the separating finger member 21 cannot press the clutch pressure plate 23 against the clutch friction plate 11 on the engine flywheel 1, resulting in incomplete torque transmission and vehicle slippage. The design of the limiting block 61 can directly prevent the driver from excessively wearing the clutch friction plate 11, and force the clutch to slip after it reaches the wear extreme point, which reminds the driver to go for repair and replacement.

[0041] Embodiment Three

[0042] Combined with Figure 6 and Figure 7 As shown, the principle and implementation steps of this embodiment are similar to those of the first embodiment. The difference lies in that: in the first embodiment, the wear degree of the clutch friction plate 11 is detected by the stroke pointer 51 and the scale 53. In this embodiment, the photoelectric prompt slave cylinder system mechanism 7 includes a switch top block 71 fixed to the clutch slave cylinder push rod 41 by a threaded manner. One end of the clutch slave cylinder body 4 close to the clutch slave cylinder push rod 41 is provided with a switch fixing device 72 having a switch 73. One end of the switch 73 contacts the switch top block 71, and the other end is connected to the instrument panel 74 with an indicator light 75. The lower end of the switch 73 has a rigid push rod 76, and the rigid push rod 76 abuts against the outer side surface of the switch top block 71. The outer side surface of the switch top block 71 is inclined, and the width of the switch top block 71 from the end close to the clutch slave cylinder body 4 to the end far from the clutch slave cylinder body 4 gradually becomes smaller. When the clutch friction plate 11 is not worn, the switch 73 abuts against the higher part of the switch top block 71 and is in a compressed state, and the switch 73 is in an off state. When the clutch friction plate 11 is worn to a certain extent, the clutch slave cylinder push rod 41 drives the switch top block 71 to move backward by a certain distance, and the rigid push rod 76 of the switch 73 changes from a compressed state to a non-compressed state. At this time, the switch 73 is in an on state, and at the same time, a connection signal is given to the instrument panel 74, that is, the indicator light 75 lights up. When the warning light 75 on the instrument panel 74 is always on, it can directly remind the driver during driving.

[0043] Embodiment Four

[0044] Combined with Figure 8 and Figure 9 As shown, the principle and implementation steps of this embodiment are similar to those of the first embodiment. The difference lies in that: in the first embodiment, the wear degree of the clutch friction plate 11 is detected by the stroke pointer 51 and the scale 53. In this embodiment, the stroke monitoring slave cylinder mechanism 8 includes a thimble 81 arranged on the clutch slave cylinder push rod 41. One end of the clutch slave cylinder body 4 close to the clutch slave cylinder push rod 41 is provided with a sensor fixing device 82 having a position sensor 83. One end of the position sensor 83 cooperates with the thimble 81 and the other end is connected to a voltmeter 84. One end of the thimble 81 is fixed to the clutch slave cylinder push rod 41 by a threaded manner, and the other end of the thimble 81 is bent and contacts the position sensor 83. When the clutch friction plate 11 is not worn, the rear end of the thimble 81 just contacts the position sensor 83 without pressure. As the clutch friction plate 11 wears slowly, the thimble 81 moves backward with the clutch slave cylinder push rod 41, and the thimble 81 gives an increasing pressure to the position sensor 83. At the same time, the position sensor 83 converts the pressure signal into the voltage value of the voltmeter 84. The visual voltmeter 84 can accurately know the wear condition of the clutch friction plate 11 and can also provide a reliable judgment basis for various fault problems of the clutch system.

[0045] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

[0046] Although terms such as engine flywheel 1, clutch friction plate 11, front housing of gearbox 12, through hole 13, input shaft 14, clutch release mechanism 2, release finger member 21, clutch cover 22, clutch pressure plate 23, release fork structure 3, release fork 31, gearbox release bearing 32, clutch slave cylinder body 4, clutch slave cylinder push rod 41, stroke simply visualizable slave cylinder mechanism 5, stroke pointer 51, scale fixing device 52, scale 53, stroke limiting slave cylinder mechanism 6, limiting block 61, photoelectric prompt slave cylinder system mechanism 7, switch top block 71, switch fixing device 72, switch 73, instrument panel 74, indicator light 75, rigid push rod 76, stroke monitoring slave cylinder mechanism 8, thimble 81, sensor fixing device 82, position sensor 83, voltmeter 84 are used more frequently herein, the possibility of using other terms is not excluded. Using these terms is only for more conveniently describing and explaining the essence of the present utility model; interpreting them as any additional limitation is contrary to the spirit of the present utility model.

Claims

1. A modular clutch sub-pump device for preventing excessive wear of a clutch friction plate, comprising an engine flywheel (1) and a clutch friction plate (11) pressed against one side of the engine flywheel (1), wherein a gearbox front housing (12) is provided on the side of the clutch friction plate (11) away from the engine flywheel (1), characterized in that: A clutch release mechanism (2) is provided on the side of the clutch friction plate (11) away from the engine flywheel (1); one side of the clutch release mechanism (2) acts on the clutch friction plate (11) and the other side is linked to a clutch slave pump push rod (41) of a clutch slave pump body (4) through a separation fork structure (3); the clutch slave pump push rod (41) is passed through a front housing (12) of a gearbox and at least one of a simple stroke visual slave pump mechanism (5), a stroke limit slave pump mechanism (6), a photoelectric prompt slave pump system mechanism (7) and a stroke monitoring slave pump mechanism (8) is provided on the clutch slave pump push rod (41).

2. A modular clutch sub-pump device for preventing excessive wear of a clutch friction plate according to claim 1, characterized in that: The simple visual stroke slave cylinder mechanism (5) comprises a stroke pointer (51) fixed on the clutch slave cylinder push rod (41) by means of a thread, and a scale fixing device (52) with a scale (53) is provided at one end of the clutch slave cylinder body (4) close to the clutch slave cylinder push rod (41), and the stroke pointer (51) and the scale (53) correspond to each other.

3. A modular clutch sub-pump device for preventing excessive wear of clutch friction plates according to claim 1, characterized in that: The stroke limit slave pump mechanism (6) comprises a limit block (61) fixed on the clutch slave pump push rod (41) by means of a thread, the gearbox front housing (12) is provided with a through hole (13) for the clutch slave pump push rod (41) to pass through, and the limit block (61) is located in the gearbox front housing (12) and abuts against one side of the through hole (13).

4. A modular clutch sub-pump device for preventing excessive wear of clutch friction plates according to claim 1, characterized in that: The photoelectric prompt slave pump system mechanism (7) includes a switch top block (71) fixed to the clutch slave pump push rod (41) by means of a thread, and a switch fixing device (72) having a switch (73) is provided at one end of the clutch slave pump body (4) close to the clutch slave pump push rod (41), and one end of the switch (73) contacts the switch top block (71), and the other end is connected to a dashboard (74) with an indicator light (75).

5. A modular clutch sub-pump device for preventing excessive wear of clutch friction plates according to claim 4, characterized in that: The switch (73) has a rigid push rod (76) at the lower end, and the rigid push rod (76) abuts against the outer side of the switch top block (71). The outer side of the switch top block (71) is an inclined surface, and the width of the switch top block (71) gradually decreases from the end close to the clutch sub-pump body (4) to the end away from the clutch sub-pump body (4).

6. A modular clutch sub-pump device for preventing excessive wear of clutch friction plates according to claim 1, characterized in that: The stroke monitoring slave pump mechanism (8) comprises a pin (81) arranged on a clutch slave pump push rod (41); a sensor fixing device (82) having a position sensor (83) is provided at one end of the clutch slave pump body (4) close to the clutch slave pump push rod (41); one end of the position sensor (83) cooperates with the pin (81) and the other end is connected to a voltmeter (84).

7. A modular clutch sub-pump device for preventing excessive wear of clutch friction plates according to claim 6, characterized in that: One end of the ejector pin (81) is fixed to the clutch cylinder push rod (41) by means of a thread, and the other end of the ejector pin (81) is bent and contacts the position sensor (83).

8. A modular clutch sub-pump device for preventing excessive wear of clutch friction plates according to claim 1, characterized in that: The engine flywheel (1) is provided with an input shaft (14), the clutch friction plate (11) is movably arranged on the circumferential outer side of the input shaft (14), and the clutch release mechanism (2) has a release finger (21), and the release finger (21) is arranged between the engine flywheel (1) and the release fork structure (3).

9. A modular clutch sub-pump device for preventing excessive wear of clutch friction plates according to claim 8, characterized in that: A clutch cover (22) is provided on the circumferential outer side of the separation finger (21), a clutch pressure plate (23) is provided on the side of the separation finger (21) away from the clutch cover (22), and the side of the clutch pressure plate (23) away from the separation finger (21) presses against the side of the clutch friction plate (11).

10. A modular clutch sub-pump device for preventing excessive wear of clutch friction plates according to claim 9, characterized in that: The release fork structure (3) comprises a release fork (31), one end of which abuts against the front housing (12) of the transmission case and the other end of which is hingedly connected to the clutch slave cylinder push rod (41), and a transmission release bearing (32) abutting against the end of the release finger (21) away from the clutch cover (22) is provided in the middle of the release fork (31).

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