Multi-wedge reverse sliding clutch

Abstract

The utility model discloses a multi-wedge type reverse sliding clutch, which comprises a central sleeve and a pressure plate, the central sleeve comprises an end plate and an annular part, no less than four groups of inner convex structures are distributed on the wall of an inner hole of the annular part in a circumferential array mode, and wedge blocks with the same number as the inner convex structures are distributed on the inner side of the pressure plate in a circumferential array mode. The wedge block is provided with an inclined surface on the side wall in the circumferential direction of the pressure plate, and the end part of the inner convex structure is provided with a chute matched with the wedge block; hollow columns extending into the annular part are distributed on the inner side of the pressing disc, connecting columns extending into the hollow columns are distributed on the inner side of the end plate, limiting pieces are installed at the ends of the connecting columns, sinking tables are arranged at the ends, close to the end plate, of the hollow columns, the connecting columns are sleeved with elastic elements, and the two ends of the elastic elements are supported on the sinking tables and the limiting pieces respectively. The inner convex structures and the connecting columns are sequentially and alternately distributed in the annular part in the circumferential direction. The pressing plate has the beneficial effects that four or more wedge blocks are arranged, so that the pressing plate moves more stably, and the eccentric wear phenomenon is not prone to occurring.

Description

Technical Field

[0001] The utility model relates to the technical field of clutches, in particular to a multi-wedge block type reverse sliding clutch. Background Art

[0002] The clutch is one of the essential components of a motorcycle's power system. It is used to connect the motorcycle's engine and gearbox and control the transmission of the motorcycle's power.

[0003] The clutch includes a center sleeve and a pressure plate. The center sleeve is provided with alternately distributed driven steel plates and active friction plates. The inner ring of the driven steel plates slides along the center sleeve axially through spline teeth. The active friction plates are movable sleeves and can also move axially. The pressure plate is located at one end of the center sleeve axially, and a spring is provided between the pressure plate and the center sleeve. Under normal circumstances, the pressure plate and the center sleeve are moved closer to each other by the force of the spring, and the moving steel plates and the active friction plates are tightly pressed between the pressure plate and the center sleeve. By pinching the clutch handle provided at the front end of the motorcycle, the pressure plate and the center sleeve can be separated, and then the driven steel plates and the active friction plates can rotate independently of each other, realizing the interruption of the clutch power.

[0004] When the motorcycle returns oil quickly or downshifts urgently, the speed of the rear wheel will be higher than the matching speed of the engine. This is a bad operating condition. The traditional clutch structure will cause the rear wheel to sway, slip, jump, lose grip, and overload the gearbox. In order to avoid the above problems, a sliding clutch has appeared on the market. Based on the original clutch structure, the sliding clutch has matching bevel blocks and bevel grooves formed on the pressure plate and the center sleeve. When the oil returns quickly or the gear is downshifted urgently, the clutch can be passively separated for a short time under the guidance of the bevel blocks and bevel grooves to ensure the stability of the vehicle.

[0005] According to the different clutch operating mechanisms of motorcycles, the sliding clutch can be divided into a forward sliding clutch and a reverse sliding clutch. In terms of physical layout, the pressure plates of the forward and reverse sliding clutches are respectively arranged on different sides of the center sleeve. During the clutch control process, the operating mechanism of the forward sliding clutch controls the movement of the pressure plate in a push mode, and the operating mechanism of the reverse sliding clutch controls the movement of the pressure plate in a pull mode.

[0006] In the prior art, due to the limitation of its own structure, the reverse sliding clutch can only arrange two or three groups of bevel blocks and bevel grooves between the center sleeve and the pressure plate. Although the passive separation function of the clutch can be satisfied, too few bevel blocks and bevel groove groups will make the pressure plate movement unstable, prone to deviation and shaking, thus causing abnormal noise during clutch operation and uneven wear of the friction plate, reducing the service life of the clutch. Utility Model Content

[0007] In view of this, the utility model provides a multi-wedge block type reverse sliding clutch, aiming to solve the technical problems raised by the background technology.

[0008] To achieve the above purpose, the technical solution of the utility model is as follows:

[0009] A multi-wedge-block reverse sliding clutch comprises a center sleeve and a pressure plate, wherein the center sleeve has an end plate and an annular portion integrally formed on the inner side of the end plate, and the pressure plate is located at an end of the annular portion away from the end plate; the characteristic is that an inner convex structure is distributed in a circumferential array on the inner hole wall of the annular portion, the inner convex structure protrudes radially inwardly along the annular portion, and wedge blocks of the same number as the inner convex structure are distributed in a circumferential array on the inner side of the pressure plate, the wedge blocks are provided with inclined surfaces on the side walls corresponding to the circumferential direction of the pressure plate, and the end of the inner convex structure is provided with a sliding surface adapted to the wedge blocks Groove; a hollow cylinder extending into the annular portion is distributed on the inner side of the pressure plate, and a through hole penetrating along the thickness direction of the pressure plate is provided in the hollow cylinder; a connecting column extending into the through hole is distributed on the inner side of the end plate, and a limiting plate is installed on the end of the connecting column; a sinker is provided at one end of the hollow cylinder close to the end plate, and an elastic element is sleeved on the connecting column, and the two ends of the elastic element are respectively supported on the sinker and the limiting plate; each of the inward convex structure and the connecting column is alternately distributed in the annular portion along the circumferential direction, and the number of the wedge blocks and the inward convex structures is not less than four groups.

[0010] With the above structure, 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 cause the pressure plate to be passively separated under the guidance of the inclined surface of the slide groove and the wedge block, thereby ensuring that the clutch is temporarily separated. After the speed of the rear wheel matches the speed of the engine again, the pressure plate is reset under the action of the elastic element. The alternatingly distributed inward convex structures and connecting columns in the array and the number of wedge blocks and inward convex structures is not less than four groups, thereby ensuring that the pressure plate can stably rotate linearly in and out along the axial direction to prevent eccentric wear.

[0011] As a preferred embodiment: driven steel plates and active friction plates arranged alternately in sequence are installed between the pressure plate and the end plate of the center sleeve, wherein at least one group of driven steel plates is mounted on the inner side of the pressure plate in a sliding spline manner, and the remaining driven steel plates are mounted on the annular portion in a sliding spline manner. With the above structure, the driven steel plates on the pressure plate enable power connection between the pressure plate and the engine, thereby ensuring that the clutch can be passively separated when the speed of the motorcycle engine and the rear wheel do not match. The alternately arranged driven steel plates and active friction plates can ensure that when the clutch is passively separated, the driven steel plates and the active friction plates rotate relatively independently, and the motorcycle will not experience rear wheel swaying, jumping, loss of grip, slipping, and gearbox overload.

[0012] As a preferred embodiment, based on the center line of the pressure plate, the circumferential diameter of the elastic element is smaller than the circumferential diameter of the wedge block. With the above structure, it can be ensured that the pressure plate moves more stably when the clutch is in a disengaged state.

[0013] Preferably, the end plate is provided with a spline hole for connecting to the gearbox, and bosses are provided at positions corresponding to the spline holes on both sides of the end plate, 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 spline hole ensures that the clutch can be connected to the gearbox, and the first reinforcing rib ensures the overall structural strength of the clutch.

[0014] As a preferred embodiment, the limiting plate is fixed to the end of the connecting column by bolts. The above structure ensures that the elastic element can be stably supported between the sink and the limiting plate.

[0015] As a preference, the inclined surface angle of the wedge block is not less than 20°. With the above structure, the pressure plate can be ensured to slide and separate smoothly.

[0016] As a preferred embodiment, 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 thickened portion makes the central connecting hole more stable in the circumferential direction.

[0017] Preferably, a second reinforcing rib is provided between the hollow cylinder and the thickened portion, and a second reinforcing rib is connected between two adjacent hollow cylinders. The above structure makes the pressure plate structure more solid.

[0018] Preferably, the number of the wedge blocks and the inner convex structures is four, five, six, seven or eight groups. With the above structure, the possibility of the pressure plate shifting can be reduced, and the eccentric wear phenomenon can be prevented.

[0019] Preferably, the inclined surface is a plane or a spiral surface. With the above structure, the pressure plate can move more smoothly and with a high degree of fit.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] 1. The multi-wedge reverse sliding clutch provided by the utility model ensures that at least four groups of wedges and slides can be arranged between the pressure plate and the center sleeve through the optimized design of the assembly structure between the pressure plate and the center sleeve. Four or more wedges are respectively mounted in the corresponding number of slides. Compared with the traditional reverse sliding clutch, the possibility of the pressure plate swinging and shaking is greatly reduced, and the stability of the pressure plate movement is improved. At the same time, under the rotary cutting guidance of the inclined surface between the wedge and the slide, a larger number of wedges cooperate with the slide, which can also play a significant self-aligning role, ensuring that the pressure plate and the center sleeve have extremely high coaxiality during the axial movement of the pressure plate, thereby preventing eccentric wear and improving the service life of the clutch.

[0022] 2. The multi-wedge block reverse sliding clutch provided by the utility model has the technical advantages of reasonable structural design, simple production and manufacturing process, easy assembly and portability, high compactness of product structure, and high strength of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structural cross-sectional view of a multi-wedge block type reverse sliding clutch;

[0024] Figure 2 Schematic diagram of the internal structure of the center sleeve 1;

[0025] Figure 3 is a schematic diagram of the surface structure of the center sleeve 1;

[0026] Figure 4 It is a schematic diagram of the internal structure of the pressure plate 2;

[0027] Figure 5 Schematic diagram of the external structure of the pressure plate 2;

[0028] Figure 6 It is a structural schematic diagram of the driven steel sheet 5;

[0029] Figure 7 It is a schematic structural diagram of the active friction plate 6. DETAILED DESCRIPTION

[0030] The utility model is further described below in conjunction with embodiments and drawings.

[0031] like Figures 1 to 5As shown, a multi-wedge type reverse sliding clutch comprises a center sleeve 1 and a pressure plate 2, wherein the center sleeve 1 is composed of an end plate 1a and an annular portion 1b integrally formed on the inner side of the end plate 1a, and the pressure plate 2 is located on the side of the annular portion 1b away from the end plate 1a. An inner convex structure 1b1 is distributed in a circumferential array on the inner hole wall of the annular portion 1b, and the inner convex structure 1b1 protrudes radially inward along the annular portion 1b, and wedge blocks 2a with the same number as the inner convex structure 1b1 are distributed in a circumferential array on the inner side of the pressure plate 2. In this embodiment, the wedge blocks 2a are integrally formed on the inner side of the pressure plate 2. The wedge blocks 2a are provided with an inclined surface 2a1 on the side wall corresponding to the circumferential direction of the pressure plate 2, and a sliding groove 1b2 adapted to the wedge blocks 2a is formed at the end of the inner convex structure 1b1. A hollow cylinder 2b is formed on the inner side of the pressure plate 2 and extends into the annular portion 1b. The hollow body 2b has a through hole 2b1 that penetrates along the thickness direction of the pressure plate 2. A connecting column 1c is formed on the inner side of the end plate 1a and extends into the through hole 2b1. A limiting plate 3 is fixedly installed at the end of the connecting column 1c.

[0032] In this embodiment, the limit plate 3 is locked to the end of the connecting column 1c by a bolt 7. A sink 2b2 is provided at one end of the hollow cylinder 2b close to the end plate 1a, and an elastic element 4 is sleeved on the connecting column 1c. In this embodiment, the elastic element 4 is preferably a compression spring, and the two ends of the elastic element 4 are respectively supported on the sink 2b2 and the limit plate 3. Each inner convex structure 1b1 and the connecting column 1c are alternately distributed in the annular portion 1b along the circumferential direction, and the number of wedge blocks 2a and inner convex structures 1b1 is not less than four groups.

[0033] With such a design, 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 2 and the center sleeve 1 can be guided by the inclined surface 2a1 of the slide groove 1b2 and the wedge block 2a, so that the pressure plate 2 is passively separated. After the speed of the rear wheel matches the speed of the engine again, the pressure plate 2 is reset under the action of the elastic element 4. By setting four or more wedge blocks 2a respectively mounted in four or more slide grooves 1b2, the possibility of the pressure plate 2 being offset is minimized compared with the traditional three wedge blocks 2a. A larger number of wedge blocks 2a cooperate with the slide groove 1b2, which can play a more obvious self-aligning role, ensuring that during the axial movement of the pressure plate 2, the pressure plate 2 and the center sleeve 1 have extremely high coaxiality, thereby preventing eccentric wear.

[0034] In addition, by optimizing the assembly structure between the pressure plate 2 and the center sleeve 1, the structural limitations of the traditional reverse sliding clutch have been broken through, and its spatial layout has been optimized, making it possible to arrange more wedges and slide grooves between the pressure plate and the center sleeve, thereby improving the stability of the reverse sliding clutch pressure plate movement, and the pressure plate is less likely to sway or shake, thereby avoiding abnormal noise during clutch operation and uneven wear of the friction plate, and increasing the service life of the clutch.

[0035] like Figure 1, Figure 6 and Figure 7 As shown, a driven steel sheet 5 and an active friction sheet 6 are installed alternately arranged between the pressure plate 2 and the end plate 1a of the center sleeve 1. In this embodiment, the active friction sheet 6 is sleeved on the annular portion 1b. When the clutch is disengaged, the active friction sheet 6 is in an active state, and can rotate relative to the center sleeve 1 and can move axially relative to the center sleeve 1. External spline teeth 6a are formed on the outer ring of the active friction sheet 6, and the motorcycle engine is connected through the external spline teeth 6a. Internal spline teeth 5a are formed on the inner ring of the driven steel sheet 5, and spline teeth are formed on the inner side of the pressure plate 2 and the annular portion 1b of the center sleeve 1. The driven steel sheet 5 is sleeved between the pressure plate 2 and the end plate 1a of the center sleeve 1 through the internal spline teeth 5a. With such a design, the active friction plate 6 ensures the power connection between the clutch and the motorcycle engine. The driven steel plate 5 and the active friction plate 6 are arranged alternately and the active friction plate 6 is rotatably installed, which ensures that when the clutch is disengaged, the driven steel plate 5 and the active friction plate 6 can rotate relatively independently, thereby realizing the separation of the motorcycle engine and the clutch power transmission.

[0036] In special circumstances, in order to ensure that the pressure plate 2 can be passively separated better, at least one group of driven steel plates 5 are installed on the inner side of the pressure plate 2, so that there is a power connection between the pressure plate 2 and the motorcycle engine. When the motorcycle engine speed does not match the rear wheel speed, the reverse speed difference between the pressure plate 2 and the center sleeve 1 can be passively separated under the guidance of the slide groove 1b2 and the inclined surface 2a1 of the wedge block 2a.

[0037] like Figure 4 As shown, based on the center line of the pressure plate 2, the circumferential diameter of the elastic element 4 is smaller than the circumferential diameter of the wedge 2a. This design can expand the support area of ​​the chute 1b2 on the pressure plate 2, so that when the pressure plate is separated, the force guided by the chute 1b2 and the wedge 2a is more uniform and stable. In order to ensure that the wedge 2a slides more smoothly inside the chute 1b2 when the clutch is separated, in this embodiment, the inclined surface 2a1 of the wedge 2a can be a plane or a spiral surface; and the inclination angle of the inclined surface 2a1 is not less than 20°.

[0038] For example Figure 3 As shown, a spline hole 1a1 is formed at the center of the end plate 1a. In this embodiment, the spline hole 1a1 is used to connect the gearbox of the motorcycle. Bosses 1d are provided at positions corresponding to the spline holes 1a1 on both sides of the end plate 1a. In order to improve the structural strength of the center sleeve 1 without increasing the thickness of the center sleeve 1, a first reinforcing rib 1e is integrally formed between the boss 1d located on the inner side of the end plate 1a and the inner convex structure 1b1.

[0039] In addition, if Figure 4As shown, a central connection hole 2c1 is provided in the middle of the pressure plate 2, and a thickened portion 2c is provided in the area corresponding to the inner end of the central connection hole 2c1. To ensure the overall structural strength of the pressure plate 2, a second reinforcing rib 2d is formed between the hollow cylinder 2b and the thickened portion 2c, and a second reinforcing rib 2d is also formed between two adjacent hollow cylinders 2b. The central connection hole 2c1 is used to connect the operating mechanism of the pressure plate. Based on the above design, the operating mechanism can be connected to the center of the thickened portion 2c, and then the pressure plate is dragged outward to control the movement of the pressure plate to achieve power cutoff.

[0040] In this embodiment, the connecting column 1c and the inner convex structure 1b1 are arranged alternately, which makes the layout of the reverse sliding clutch more compact and can make the force of the pressure plate 2 more stable. The mutual cooperation between the hollow cylinder 2b and the connecting column 1c and the mutual cooperation between the wedge block 2a and the slide groove 1b2 meet the assembly precision of the reverse sliding clutch.

[0041] 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 multi-wedge type reverse sliding clutch, comprising a center sleeve (1) and a pressure plate (2), wherein the center sleeve (1) comprises an end plate (1a) and an annular portion (1b) integrally formed on the inner side of the end plate (1a), and the pressure plate (2) is located at one end of the annular portion (1b) away from the end plate (1a); Features: The inner hole wall of the annular portion (1b) is provided with an inner convex structure (1b1) arranged in a circumferential array, the inner convex structure (1b1) protrudes radially inward along the annular portion (1b), the inner side of the pressure plate (2) is provided with a wedge block (2a) of the same number as the inner convex structure (1b1), 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 end of the inner convex structure (1b1) is provided with a slide groove (1b2) adapted to the wedge block (2a); A hollow cylinder (2b) extending into the annular portion (1b) is distributed on the inner side of the pressure plate (2), and a through hole (2b1) penetrating along the thickness direction of the pressure plate (2) is provided in the hollow cylinder (2b); a connecting column (1c) extending into the through hole (2b1) is distributed on the inner side of the end plate (1a), and a limiting plate (3) is installed at the end of the connecting column (1c); a sink (2b2) ​​is provided at one end of the hollow cylinder (2b) close to the end plate (1a), and an elastic element (4) is sleeved on the connecting column (1c), and the two ends of the elastic element (4) are respectively supported on the sink (2b2) ​​and the limiting plate (3); The inner convex structures (1b1) and the connecting columns (1c) are alternately distributed in the annular portion (1b) along the circumferential direction, and the number of the wedge blocks (2a) and the inner convex structures (1b1) is no less than four groups.

2. The multi-wedge type reverse sliding clutch according to claim 1, characterized in that: Driven steel plates (5) and active friction plates (6) are installed between the pressure plate (2) and the end plate (1a) of the center sleeve (1) in an alternating arrangement, wherein at least one group of the driven steel plates (5) is mounted on the inner side of the pressure plate (2) in a sliding spline manner, and the remaining driven steel plates (5) are mounted on the annular portion (1b) in a sliding spline manner.

3. The multi-wedge type reverse sliding clutch according to claim 1, characterized in that: Based on the center line of the pressure plate (2), the circumferential diameter of the circle where the elastic element (4) is located is smaller than the circumferential diameter of the circle where the wedge block (2a) is located.

4. The multi-wedge type reverse sliding clutch according to claim 1, characterized in that: The end plate (1a) is provided with a spline hole (1a1) for connecting to a gearbox, and bosses (1d) are provided at positions corresponding to the spline holes (1a1) on both inner and outer sides of the end plate (1a), wherein a first reinforcing rib (1e) is integrally formed between the boss (1d) located on the inner side and the inner convex structure (1b1).

5. The multi-wedge type reverse sliding clutch according to claim 1, characterized in that: The limiting plate (3) is fixed to the end of the connecting column (1c) by means of bolts.

6. The multi-wedge type reverse sliding clutch according to claim 1, characterized in that: The inclination angle of the inclined surface (2a1) of the wedge block (2a) is not less than 20°.

7. The multi-wedge type reverse sliding clutch according to claim 1, characterized in that: The pressure plate (2) is provided with a central connecting hole (2c1) in the middle, and the pressure plate (2) is provided with a thickened portion (2c) in an area corresponding to the inner end of the central connecting hole (2c1).

8. The multi-wedge type reverse sliding clutch according to claim 7, characterized in that: A second reinforcing rib (2d) is provided between the hollow cylinder (2b) and the thickened portion (2c), and the second reinforcing rib (2d) is connected between two adjacent hollow cylinders (2b).

9. The multi-wedge type reverse sliding clutch according to claim 1, characterized in that: The number of the wedge blocks (2a) and the inner convex structures (1b1) is four groups, five groups, six groups, seven groups or eight groups.

10. The multi-wedge type reverse sliding clutch according to claim 1, characterized in that: The inclined surface (2a1) is a plane or a spiral surface.

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