Slip clutch

Abstract

The utility model discloses a sliding clutch which comprises a center sleeve and a pressure plate which are arranged oppositely in the axial direction, driven steel sheets and driving friction sheets which are sequentially and alternately arranged are installed between the center sleeve and the pressure plate, and an elastic element is arranged between the center sleeve and the pressure plate. The elastic element exerts force enabling the pressing disc to be pressed towards the center sleeve, a wedge-shaped guiding structure is arranged between the pressing disc and the center sleeve, and when the rotating speed of the center sleeve is larger than that of the pressing disc, the wedge-shaped guiding structure can guide the pressing disc to move in the direction away from the center sleeve. At least one group of driven steel sheets are sleeved on the inner side of the pressure plate in a sliding spline manner, and the driven steel sheets sleeved on the inner side of the pressure plate are positioned in an axial space occupied by the wedge-shaped guide structure in the axial direction of the sliding clutch. The sliding clutch has the advantages that the problem that deflection and vibration are prone to occurring in the separation and combination process of the clutch is solved, and the working stability of the sliding clutch is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of clutches, in particular to a sliding clutch. Background Art

[0002] The clutch is an important part of the motorcycle power system. It is set between the engine and the gearbox and is used to transmit or cut off power between the engine and the gearbox. Among them, the sliding clutch is a type of motorcycle clutch. The sliding clutch consists of a center sleeve, a pressure plate, a spring, and a number of driven steel plates and active friction plates. At least one driven steel plate is slidably mounted on the pressure plate through spline teeth, and the remaining driven steel plates are mounted on the center sleeve through spline teeth. The active friction plate and the driven steel plate are alternately arranged in sequence. The active friction plate is a movable set and can also move axially. The spring is installed between the center sleeve and the pressure plate. The spring applies an elastic force to the pressure plate to make the driven steel plate and the active friction plate frictionally combined into one. A wedge-shaped inclined surface group is also set between the pressure plate and the center sleeve, and the two form a one-way thorn principle. The assembly structure of the sliding block clutch when applied to the motorcycle powertrain is: the outer ring of the active friction plate is connected to the engine power through the clutch drum, and the center sleeve is connected to the gearbox power through the spline hole. The transmission path of the motorcycle power system is: engine → active friction plate → driven steel plate → center sleeve → gearbox → rear wheel. The driver controls the pressure plate to move away from the center sleeve through the handle, and the spring presses the pressure plate back after releasing the handle, thereby realizing the active separation and engagement process of the sliding clutch.

[0003] In addition, the sliding clutch also has a passive separation function. Specifically, because there is a wedge-shaped inclined surface group between the pressure plate and the center sleeve, and at least one set of driven plates is connected to the pressure plate, when the speed of the rear wheel of the motorcycle is higher than the matching speed of the engine, the reverse speed difference between the pressure plate and the center sleeve can be guided by the wedge-shaped inclined surface group to make the pressure plate passively separated, ensuring that the clutch is temporarily separated. After the rear wheel speed matches the engine speed again, the pressure plate is reset under the action of the spring. When the motorcycle quickly returns oil or urgently downshifts, the speed of the rear wheel will be higher than the matching speed of the engine. This is a severe operating condition, which will cause the rear wheel to sway, slip, jump, lose grip, and overload the gearbox. The passive separation function of the sliding clutch can effectively solve this problem.

[0004] The Chinese utility model patent document with announcement number CN215634555U discloses a sliding clutch and a center sleeve combination thereof, wherein the sliding clutch comprises a center sleeve and a pressure plate that are slidably assembled together, the center sleeve is provided with a pair of wedge blocks protruding in the axial direction, the pressure plate is provided with grooves that match the wedge blocks, and the center sleeve and the pressure plate are both provided with friction plates. The rear wheel of the motorcycle is connected to the center sleeve through the gearbox, and the engine is connected to the center sleeve and the pressure plate through the master and slave friction plates. Based on this structure, when the motorcycle shifts gears, if the rear wheel speed exceeds the matching speed of the engine, a speed difference will be generated between the center sleeve and the pressure plate. Under the guidance of the inclined surface of the wedge block in the clutch, the speed difference will force the pressure plate to rotate axially away from the center sleeve body, and the clutch will achieve a short passive separation.

[0005] In the prior art, for example, in the sliding clutch disclosed in the above prior art documents, the wedge block is arranged at a position close to the center sleeve end plate, and the center sleeve end plate and the pressure plate are relatively arranged. It can be seen that the wedge-shaped inclined surface group in the sliding clutch has an obvious axial distance relative to the main plane of the pressure plate, and at the moment of passive separation of the sliding clutch, the rotation speed of the center sleeve is greater than the rotation speed of the pressure plate, which is equivalent to the pressure plate being the fulcrum for rotational separation. In this case, the axial distance between the wedge-shaped inclined surface group and the main plane of the pressure plate will cause the force between the center sleeve and the pressure plate to have an obvious axial cantilever, thereby causing the sliding clutch to sway and vibrate during the engagement and separation process. There is room for further optimization of the working stability and reliability of the sliding clutch. Utility Model Content

[0006] In view of this, the utility model provides a sliding clutch, aiming to solve the problem of deflection and vibration that are prone to occur during the separation and engagement process of the clutch, and to improve the working stability of the sliding clutch.

[0007] To achieve the above purpose, the technical solution of the utility model is as follows:

[0008] A sliding clutch comprises a center sleeve and a pressure plate which are arranged opposite to each other in the axial direction, a driven steel sheet and an active friction sheet which are arranged alternately in sequence are installed between the center sleeve and the pressure plate, an elastic element is arranged between the center sleeve and the pressure plate, and the elastic element applies a force to press the pressure plate toward the center sleeve, and is characterized in that: a wedge-shaped guide structure is provided between the pressure plate and the center sleeve, and when the rotation speed of the center sleeve is greater than the rotation speed of the pressure plate, the wedge-shaped guide structure can guide the pressure plate to move away from the center sleeve; at least one group of the driven steel sheets is sleeved on the inner side of the pressure plate in the manner of a sliding spline, and the driven steel sheets sleeved on the inner side of the pressure plate are located in the axial space occupied by the wedge-shaped guide structure in the axial direction of the sliding clutch.

[0009] With the above structure, since more than one set of driven steel plates are mounted on the inner side of the pressure plate, the fulcrum for passive rotation separation is on the pressure plate, and the driven steel plates are located in the axial space occupied by the wedge-shaped guide structure in the axial direction of the sliding clutch, so that the axial distance between the guide surface on the wedge-shaped guide structure and the fulcrum is smaller, thereby reducing the deflection and vibration of the sliding clutch during the engagement and separation process, and improving the working stability and reliability of the sliding clutch.

[0010] As a preference: there are multiple groups of wedge-shaped guide structures, each group of wedge-shaped guide structures is distributed along the circumference of the sliding clutch, the wedge-shaped guide structure comprises a wedge block arranged on the pressure plate and a sliding hole arranged on the center sleeve, the wedge block is provided with an inclined surface on the side wall corresponding to the circumferential direction of the pressure plate, and the sliding hole is adapted to the wedge block. With the above structure, the wedge block is arranged on the pressure plate, which can reduce the axial distance between the inclined surface and the fulcrum on the pressure plate.

[0011] Preferably, the inclined surfaces are arranged on the side walls of the wedge block corresponding to the pressure plate in the circumferential direction, and the inclined surfaces on both sides are inclined in the same direction. With the above structure, the contact between the inclined surface and the inner wall of the sliding hole can form a one-way thorn principle, so that when a speed difference occurs between the center sleeve and the pressure plate, under the guidance of the inclined surface, the speed difference will force the pressure plate to rotate axially away from the center sleeve body, and the clutch can achieve a short passive separation.

[0012] Preferably, the center sleeve includes an end plate and an annular portion integrally formed on the inner side of the end plate, an inner wall of the annular portion is provided with an inner convex structure protruding radially inward, the sliding hole is provided at the end of the inner convex structure away from the end plate, and the pressure plate is located at the end of the annular portion away from the end plate. With the above structure, the sliding hole is provided at the end of the inner convex structure away from the end plate, so that when the center sleeve and the pressure plate are sheathed together, the wedge block and the sliding hole can adapt to each other, which has the technical advantages of simple center sleeve structure and convenient die-casting.

[0013] Preferably, the end plate is provided with a spline hole for connecting the gearbox, and bosses are provided on both inner and outer sides of the end plate at positions corresponding to the spline holes, wherein a first reinforcing rib is integrally formed between the boss located on the inner side and the inner convex structure. With the above structure, the arrangement of the boss and the first reinforcing rib can increase the structural strength of the center sleeve without increasing the thickness of the center sleeve.

[0014] As a preferred embodiment: the inner side of the pressure plate is provided with a column extending into the inner part of the annular portion, the column is provided with a through hole penetrating along the thickness direction of the pressure plate, the inner side of the end plate is provided with a connecting column extending into the through hole, a limiting plate is installed at one end of the connecting column located in the through hole, a sinking platform is provided at one end of the through hole away from the pressure plate, and the elastic element is a compression spring, and its two ends are supported on the sinking platform and the limiting plate respectively. With the above structure, the two ends of the compression spring are supported on the sinking platform and the limiting plate respectively, so that the compression spring can apply a force to the pressure plate to compress it in the direction of the center sleeve, thereby maintaining friction transmission between the driven steel plate and the active friction plate, and realizing continuous transmission of power.

[0015] Preferably, the limiting plate is locked to the end of the connecting column by a bolt screwed onto the connecting column.

[0016] As a preference, there are four groups of the inner convex structures, which are arranged in a circular array on the inner wall of the annular portion, and there are four groups of the columns, which are arranged in a circular array on the inner side of the pressure plate, and the four groups of the inner convex structures and the four groups of the columns are arranged alternately in the annular portion. With the above structure, the four groups of the inner convex structures and the columns are arranged alternately in the annular portion, which can effectively improve the space utilization rate.

[0017] Preferably, a central connecting hole is provided in the middle of the pressure plate, and a thickened portion is provided in the area corresponding to the inner end of the central connecting hole. With the above structure, the central connecting hole is used to connect the separation drive mechanism that pulls the pressure plate outward, and the thickened portion is provided in the area at the inner end of the central connecting hole to enhance the strength of the pressure plate.

[0018] Preferably, a second reinforcing rib is provided between the column and the thickened portion, and a third reinforcing rib is connected between two adjacent columns. With the above structure, the second and third reinforcing ribs can strengthen the overall strength of the pressure plate, making the pressure plate more reliable and able to withstand stronger external forces.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] 1. At least one group of driven steel sheets are sleeved on the inner side of the pressure plate in the form of sliding splines, so that the pressure plate and the center sleeve produce a speed difference and the fulcrum is on the pressure plate when they rotate and separate from each other, and the driven steel sheet is located in the axial space occupied by the wedge-shaped guide structure in the axial direction of the sliding clutch. The wedge-shaped guide structure includes a wedge block arranged on the pressure plate, so that the wedge block and the fulcrum are both on the pressure plate, and the axial distance between the guide surface on the wedge block and the fulcrum is small, or even zero, thereby improving the deflection and vibration of the sliding clutch during the engagement and separation process, and improving the working stability and reliability of the sliding clutch.

[0021] 2. One end of the elastic element is supported on a limit plate fixed on the pressure plate, and the other end is supported on the sink of the center sleeve, so that the elastic element can apply a force to the pressure plate to compress it in the direction of the center sleeve, thereby maintaining friction transmission between the driven steel plate and the active friction plate to achieve continuous power transmission. To achieve power separation, the pressure plate needs to move outward to overcome the elastic force of the elastic element, thereby cutting off the friction transmission between the driven steel plate and the active friction plate. Different from the traditional sliding clutch that uses the method of pushing the pressure plate to cut off power, the utility model provides a method of cutting off power transmission by pulling the pressure plate outward, which provides a new method for assembling the sliding clutch in a motorcycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the exploded structure of the sliding clutch;

[0023] Figure 2 It is a structural schematic diagram of the center sleeve 1;

[0024] Figure 3 It is a structural schematic diagram of the pressure plate 2;

[0025] Figure 4 A partial schematic diagram showing the structure of the driven steel plate 3 and the active friction plate 4;

[0026] Figure 5 is a cross-sectional view of a slip clutch;

[0027] Figure 6 The figure is a schematic diagram of the cross-sectional structure of the wedge block 2a and the sliding hole 1a. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with embodiments and drawings.

[0029] like Figure 1 , Figure 2 and Figure 3As shown, a sliding clutch comprises a center sleeve 1 and a pressure plate 2 which are arranged opposite to each other in the axial direction. A driven steel plate 3 and an active friction plate 4 which are arranged alternately in sequence are installed between the center sleeve 1 and the pressure plate 2. An elastic element 5 is arranged between the center sleeve 1 and the pressure plate 2. The elastic element 5 exerts a force to press the pressure plate 2 toward the center sleeve 1, so that the driven steel plate 3 and the active friction plate 4 can maintain friction transmission and realize the clutch engagement function. A wedge-shaped guide structure is provided between the pressure plate 2 and the center sleeve 1. When the rotation speed of the center sleeve 1 is greater than the rotation speed of the pressure plate 2, the wedge-shaped guide structure can guide the pressure plate 2 to move away from the center sleeve 1. At least one group of driven steel plates 3 is fixedly sleeved on the inner side of the pressure plate 2 in the form of a sliding spline. The driven steel plates 3 sleeved on the inner side of the pressure plate 2 are located in the axial space occupied by the wedge-shaped guide structure in the axial direction of the sliding clutch. Among them, the number of wedge-shaped guide structures is four groups, and each group of wedge-shaped guide structures is distributed circumferentially along the circumference of the sliding clutch. Please refer to Figure 6 The wedge-shaped guide structure includes a wedge block 2a provided on the pressure plate 2 and a sliding hole 1a provided on the center sleeve 1. The wedge block 2a is provided with an inclined surface 2a1 on the side wall corresponding to the circumferential direction of the pressure plate 2, and the sliding hole 1a is adapted to the wedge block 2a. During the rotation of the pressure plate 2, the wedge block 2a will pass through an annular space, and the driven steel sheet 3 on the pressure plate 2 is located in the annular space. In other words, in the axial direction of the sliding clutch, the driven steel sheet 3 on the inner side of the pressure plate 2 is located in the axial space occupied by the wedge-shaped guide structure.

[0030] Based on the above design, when the pressure plate 2 and the center sleeve 1 are passively separated, a group of driven steel sheets 3 are sleeved on the inner side of the pressure plate 2 in the form of sliding splines, so that the pressure plate 2 and the center sleeve 1 produce a speed difference and rotate to separate from each other, and the wedge block 2a in the wedge-shaped guide structure is arranged on the pressure plate 2. Since the wedge block 2a and the fulcrum are both on the pressure plate 2, and the driven steel sheet 3 is located in the axial space occupied by the wedge block 2a in the axial direction of the sliding clutch, the axial distance between the inclined surface 2a1 on the wedge block 2a responsible for guiding and the passive separation fulcrum is small, or even zero, thereby improving the deflection and vibration of the sliding clutch during the engagement and separation process, and improving the working stability and reliability of the sliding clutch.

[0031] like Figure 2 and Figure 3As shown, the inclined surface 2a1 is arranged on the side walls of the wedge block 2a corresponding to the pressure plate 2 in the circumferential direction, and the inclined surfaces 2a1 on both sides are inclined in the same direction, and the inclination angle is above 20°. The wedge block 2a is provided with an arc surface 2a2 on the side walls of the pressure plate 2 in the radial direction, and the inner wall of the sliding hole 1a is in sliding contact with the inclined surface 2a1 and the arc surface 2a2 respectively. Based on the above design, the inclined surface 2a1 is used to guide the passive separation of the pressure plate 2 and the center sleeve 1, and the arc surface 2a2 is used to make the passive separation smoother. The inner wall of the sliding hole 1a cooperates with the inclined surface 2a1 and the arc surface 2a2 to form a one-way thorn principle. When there is a speed difference between the pressure plate 2 and the center sleeve 1, the wedge block 2a can move in the sliding hole 1a under the guidance of the inclined surface 2a1, so that the pressure plate 2 can move axially to achieve separation and combination with the center sleeve 1. When the pressure plate 2 and the center sleeve 1 are separated and combined, they are also subjected to the rotational force provided by the cooperation of the wedge block 2a and the sliding hole 1a.

[0032] As shown in FIG. 2 , the center sleeve 1 includes an end plate 11 of a disc structure and an annular portion 12 integrally formed on the inner side of the end plate 11. The outer wall of the annular portion 12 is provided with a first spline tooth b1, and the inner wall of the annular portion 12 is provided with an inner convex structure 13 protruding radially inward. The number of the inner convex structures 13 is four groups and the inner wall of the annular portion 12 is distributed in a circular array, and the top of the inner convex structure 13 is flush with the top of the annular portion 12. The sliding hole 1a is provided at the end of the inner convex structure 13 away from the end plate 11, and the pressure plate 2 is located at the end of the annular portion 12 away from the end plate 11. The end plate 11 is provided with a spline hole 14 for connecting the gearbox, and the power is transmitted to the center sleeve 1 through the spline hole 14. Bosses 15 are provided on both inner and outer sides of the end plate 11 at positions corresponding to the spline holes 14, wherein a first reinforcing rib 16 is integrally formed between the inner boss 15 and the inner convex structure 13, which can increase the strength of the center sleeve 1 so that the center sleeve 1 can withstand stronger power.

[0033] like Figure 2 , Figure 3 and Figure 5As shown, the inner side of the pressure plate 2 is provided with a column 21 extending into the inside of the annular portion 12. There are four groups of columns 21, and the columns 21 are distributed in a circular array on the inner side of the pressure plate 2. The four groups of inner convex structures 13 and the four groups of columns 21 are arranged alternately in the annular portion 12. The column 21 is provided with a through hole 211 penetrating along the thickness direction of the pressure plate 2. The inner side of the end plate 11 is provided with a connecting column 17 extending into the through hole 211. The end of the connecting column 17 located in the through hole 211 is fixedly installed with a limiting plate a1. The end of the through hole 211 away from the pressure plate 2 is provided with a sink a2. The elastic element 5 is a compression spring, and its two ends are supported on the sink a2 and the limiting plate a1 respectively. When the pressure plate 2 and the center sleeve 1 are in a state of dynamic connection, the compression spring is in a compressed state, and a force is applied to the pressure plate 2 to compress toward the center sleeve 1. The limiting plate a1 is fixedly locked to the end of the connecting column 17 by a bolt a3 screwed on the connecting column 17. Based on the above design, the pressure plate 2 and the center sleeve 1 are slidably mounted, the connecting column 17 is inserted into the through hole 211, the wedge block 2a slides into the sliding hole 1a, and the two ends of the compression spring are respectively supported on the sinking platform a2 and the limit plate a1. The limit plate a1 is fixed on the top of the connecting column 17, so that the compression spring can apply a pressing force to the pressure plate 2 in the direction of the center sleeve 1, thereby maintaining friction transmission between the driven steel plate 3 and the active friction plate 4 to achieve continuous transmission of power.

[0034] like Figure 2 As shown, the outer side of the wedge block 2a is provided with a second spline tooth b2, the middle position of the pressure plate 2 is provided with a central connecting hole 22, and the pressure plate 2 is provided with a thickened portion 23 in the area corresponding to the inner end of the central connecting hole 22. A second reinforcing rib 24 is provided between the column 21 and the thickened portion 23, and a third reinforcing rib 25 is connected between two adjacent columns 21. Based on the above design, the separation drive component is connected to the pressure plate 2 through the central connecting hole 22. When the sliding clutch needs power separation, the separation drive component needs to pull the pressure plate 2 outward to overcome the elastic force provided by the compression spring, thereby cutting off the friction transmission of the driven steel plate 3 and the active friction plate 4, so that the sliding clutch is in a power separation state.

[0035] like Figure 4 As shown, there are multiple groups of driven steel plates 3 and active friction plates 4, and when the pressure plate 2 and the center sleeve 1 are pressed tightly, the driven steel plates 3 and the active friction plates 4 will maintain frictional engagement. Transmission spline grooves 31 are distributed on the circumference of the inner ring of the driven steel plate 3, and the transmission spline grooves 31 are meshed with the first spline teeth b1 and the second spline teeth b2. Power spline teeth 41 are distributed on the outer ring of the active friction plate 4, which are used to transmit power to the active friction plate 4. A friction material layer 42 is distributed on the side of the active friction plate 4 close to the driven steel plate 3, so that the active friction plate 4 can transmit power after frictional engagement with the driven steel plate 3.

[0036] In this embodiment, the sliding clutch can control the pressure plate 2 to move away from the center sleeve 1 by dragging it outward, thereby achieving clutch disengagement, and providing a reverse sliding clutch. Based on the traditional technology, it is difficult to set the wedge-shaped guide structure close to the pressure plate 2 due to its own structural limitations. However, this embodiment makes it possible by optimizing the assembly structure between the pressure plate 2 and the center sleeve 1, thereby improving the working stability and reliability of the reverse sliding clutch.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make a variety of similar expressions without violating the purpose and claims of the present invention, and such changes fall within the scope of protection of the present invention.

Claims

1. A sliding clutch, comprising a center sleeve (1) and a pressure plate (2) arranged opposite to each other in the axial direction, a driven steel plate (3) and an active friction plate (4) arranged alternately in sequence are installed between the center sleeve (1) and the pressure plate (2), an elastic element (5) is arranged between the center sleeve (1) and the pressure plate (2), and the elastic element (5) applies a force to press the pressure plate (2) toward the center sleeve (1), characterized in that: A wedge-shaped guiding structure is provided between the pressure plate (2) and the center sleeve (1); when the rotation speed of the center sleeve (1) is greater than the rotation speed of the pressure plate (2), the wedge-shaped guiding structure can guide the pressure plate (2) to move in a direction away from the center sleeve (1); At least one group of the driven steel sheets (3) is sleeved on the inner side of the pressure plate (2) in the form of sliding splines, and the driven steel sheets (3) sleeved on the inner side of the pressure plate (2) are located in the axial space occupied by the wedge-shaped guide structure in the axial direction of the sliding clutch.

2. The sliding clutch according to claim 1, characterized in that: The wedge-shaped guide structures include multiple groups, each group of wedge-shaped guide structures is distributed along the circumference of the sliding clutch, the wedge-shaped guide structures include a wedge block (2a) arranged on the pressure plate (2) and a sliding hole (1a) arranged on the center sleeve (1), the wedge block (2a) is provided with an inclined surface (2a1) on the side wall corresponding to the circumferential direction of the pressure plate (2), and the sliding hole (1a) is adapted to the wedge block (2a).

3. The sliding clutch according to claim 2, characterized in that: The inclined surfaces (2a1) are arranged on the side walls of the wedge block (2a) corresponding to the pressure plate (2) on both sides in the circumferential direction, and the inclined surfaces (2a1) on both sides are inclined in the same direction.

4. The sliding clutch according to claim 2, characterized in that: The center sleeve (1) comprises an end plate (11) and an annular portion (12) integrally formed on the inner side of the end plate (11); an inner convex structure (13) protruding radially inward is provided on the inner wall of the annular portion (12); the sliding hole (1a) is provided at an end of the inner convex structure (13) away from the end plate (11); and the pressure plate (2) is located at an end of the annular portion (12) away from the end plate (11).

5. The sliding clutch according to claim 4, characterized in that: The end plate (11) is provided with a spline hole (14) for connecting to a gearbox, and bosses (15) are provided on both inner and outer sides of the end plate (11) at positions corresponding to the spline holes (14), wherein a first reinforcing rib (16) is integrally formed between the boss (15) located on the inner side and the inner convex structure (13).

6. The sliding clutch according to claim 4, characterized in that: The inner side of the pressure plate (2) is provided with a column (21) extending into the interior of the annular portion (12); the column (21) is provided with a through hole (211) penetrating along the thickness direction of the pressure plate (2); the inner side of the end plate (11) is provided with a connecting column (17) extending into the through hole (211); a limiting plate (a1) is installed at one end of the connecting column (17) located in the through hole (211); a sink (a2) is provided at one end of the through hole (211) away from the pressure plate (2); the elastic element (5) is a compression spring, and its two ends are respectively supported on the sink (a2) and the limiting plate (a1).

7. The sliding clutch according to claim 6, characterized in that: The limiting plate (a1) is locked to the end of the connecting column (17) by means of a bolt (a3) ​​screwed onto the connecting column (17).

8. The sliding clutch according to claim 6, characterized in that: There are four groups of the inner convex structures (13), which are distributed in a circular array on the inner wall of the annular portion (12); there are four groups of the columns (21), which are distributed in a circular array on the inner side of the pressure plate (2); and the four groups of the inner convex structures (13) and the four groups of the columns (21) are arranged alternately in sequence in the annular portion (12).

9. The sliding clutch according to claim 6, characterized in that: A central connecting hole (22) is provided in the middle of the pressure plate (2), and a thickened portion (23) is provided in an area of ​​the pressure plate (2) corresponding to the inner end of the central connecting hole (22).

10. The sliding clutch according to claim 9, characterized in that: A second reinforcing rib (24) is provided between the column (21) and the thickened portion (23), and a third reinforcing rib (25) is connected between two adjacent columns (21).

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