Motorcycle, stepless speed change clutch and moving wheel bushing structure

Abstract

The utility model relates to a motorcycle stepless speed change clutch, concretely relates to a moving wheel bushing structure, including moving wheel, bush, the moving wheel has the central hole, the moving wheel central hole is provided with the shaft sleeve in interference fit, the bush interference fit is arranged in the shaft sleeve, adds the shaft sleeve structure between the moving wheel central hole and the bush, and the shaft sleeve has the safe interference amount with the moving wheel, and will not be loose, and the thermal expansion coefficient of the bush and the shaft sleeve is consistent, and will not be loose and turn, so can effectively prevent the bush thermal expansion loose, wear, exit problem, increased the reliability of the clutch, greatly improved the life of the clutch.

Description

Technical Field

[0001] This utility model relates to the field of continuously variable transmission (CVT) clutch technology for motorcycles, specifically to a moving wheel bushing structure for a CVT clutch. Background Technology

[0002] Continuously variable transmission (CVT) clutches are widely used in motorcycles. They mainly consist of a drive pulley assembly, a driven pulley assembly, and a belt. The drive pulley assembly is connected to the engine crankshaft. When the engine crankshaft rotates, the drive pulley drives the driven pulley to rotate via the belt, thus outputting power.

[0003] The moving wheel is a key component of the continuously variable transmission (CVT) clutch, such as... Figure 1 The existing movable wheel (100) is made of aluminum alloy, and an oil-impregnated bushing (200) needs to be pressed into its center hole. The oil-impregnated bushing is made of powder metallurgy, and its structure is thin-walled. After pressing, the center hole cannot be further machined. The interference fit between the oil-impregnated bushing and the center hole of the movable wheel cannot be too large, otherwise deformation and out-of-roundness will occur after pressing, resulting in unusability. At the same time, the operating temperature of the clutch is 80-120 degrees Celsius. The thermal expansion of the movable wheel is greater than that of the oil-impregnated bushing. After the temperature rises, the oil-impregnated bushing rotates inside the movable wheel, which leads to increased wear in the center hole of the movable wheel and disengagement of the oil-impregnated bushing, causing premature clutch failure. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model aims to provide a moving wheel bushing structure for a continuously variable transmission clutch. By adding a bushing structure between the center hole of the moving wheel and the bushing, the problem of bushing loosening due to thermal expansion, wear, and disengagement can be effectively prevented.

[0005] The movable wheel bushing structure in this solution is used for continuously variable transmission clutches. It includes a movable wheel and a bushing. The movable wheel has a central hole, and a bushing is interference-fitted into the central hole of the movable wheel. The bushing is interference-fitted into the bushing.

[0006] Furthermore, the bushing and the bushing have the same coefficient of thermal expansion.

[0007] Furthermore, the inner end of the bushing has a retaining ring.

[0008] Furthermore, there are two bushings and two retaining rings. The two bushings are located at both ends of the inner hole of the bushing. An annular boss is provided in the middle of the inner hole of the bushing. The diameter of the boss is smaller than the outer diameter of the bushing. An annular groove is provided at each end of the inner hole of the bushing. The retaining ring is stuck in the annular groove.

[0009] Preferably, there are two retaining rings, which are located at both ends of the inner hole of the bushing to form an axial limit on the bushing.

[0010] The continuously variable transmission clutch of this solution includes the moving wheel bushing structure as described above.

[0011] The motorcycles in this scheme include the continuously variable transmission (CVT) clutch as described above.

[0012] The advantages of this utility model are:

[0013] 1. A bushing is designed inside the center hole of the movable wheel. The bushing has a larger interference fit, and there is a safe interference fit between the bushing and the movable wheel, so it will not loosen.

[0014] 2. The bushing and the shaft sleeve have the same coefficient of thermal expansion, so they will not loosen or rotate.

[0015] 3. Add retaining rings at both ends of the bushing to reinforce and prevent the bushing from coming out. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the existing technology.

[0017] Figure 2 This is a schematic diagram of the movable wheel sleeve structure of this utility model.

[0018] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0019] In the diagram, 1 is the moving wheel, 2 is the bushing, 21 is the boss, 3 is the bushing, and 4 is the retaining ring. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0021] according to Figure 2 , 3 As shown, this solution presents a sliding wheel insert structure for a continuously variable transmission clutch, comprising a sliding wheel 1, a bushing 2, a bushing 3, and a retaining ring 4. The sliding wheel 1 has a central hole, the bushing 2 is interference-fitted into the central hole of the sliding wheel 1, the bushing 3 is interference-fitted into the bushing 2, and the retaining ring 4 is located at the end of the inner hole of the bushing 2. The bushing 3 in this solution is an oil-impregnated bushing, a sliding bearing, or a sleeve-shaped structure made of other materials.

[0022] A bushing 2 is installed between the movable wheel 1 and the bushing 3 for transition. The interference fit of the bushing 2 is increased, and there is a safe interference fit between the bushing 2 and the movable wheel to prevent loosening. After the bushing is pressed into the movable wheel, the inner hole of the bushing is machined, and then the bushing 3 is pressed in.

[0023] See details Figure 2There are two bushings 3 and two retaining rings 4. The two bushings 3 are respectively interference-fitted at both ends of the inner hole of the bushing 2. The inner hole of the bushing 2 is provided with an annular boss 21. The diameter of the boss 21 is smaller than the outer diameter of the bushing 3. An annular groove is opened at both ends of the inner hole of the bushing 2. The retaining ring 5 is stuck in the annular groove. The two bushings 3 are both stuck between the boss 21 and the retaining ring 4, forming an axial limit on the bushing 3, which can effectively prevent the bushing 3 from falling out.

[0024] In another embodiment, there are two retaining rings 4 and one bushing 3. The two retaining rings 4 are located at both ends of the inner hole of the bushing, forming an axial limit on the bushing 3.

[0025] Both bushing 2 and bushing 3 are made of steel and have the same coefficient of thermal expansion, so they will not loosen or rotate.

[0026] In the embodiment of the continuously variable transmission clutch, the moving wheel bushing structure described above is adopted, which can effectively prevent the bushing 3 from loosening, wearing, and disengaging due to thermal expansion, thereby increasing the reliability of the clutch and greatly improving its lifespan.

[0027] Similarly, the motorcycle embodiment employs the continuously variable transmission clutch as described above, which also has corresponding beneficial effects.

[0028] The above description is merely an embodiment of this utility model, and common knowledge such as specific structures and characteristics of the solution is not described in detail here. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model, and these should also be considered within the protection scope of this utility model. These modifications and improvements will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. A movable wheel insert structure for a continuously variable transmission clutch, characterized in that: It includes a movable wheel and a bushing. The movable wheel has a central hole, and a bushing is provided in the central hole of the movable wheel with an interference fit. The bushing is disposed in the bushing with an interference fit.

2. The movable wheel sleeve structure according to claim 1, characterized in that: The bushing and the bushing have the same coefficient of thermal expansion.

3. The movable wheel sleeve structure according to claim 1, characterized in that: The inner end of the bushing has a retaining ring.

4. The movable wheel sleeve structure according to claim 3, characterized in that: The bushing and retaining ring are in pairs. The two bushings are located at both ends of the inner hole of the bushing. An annular boss is provided in the middle of the inner hole of the bushing. The diameter of the boss is smaller than the outer diameter of the bushing. An annular groove is provided at each end of the inner hole of the bushing. The retaining ring is stuck in the annular groove.

5. The movable wheel sleeve structure according to claim 3, characterized in that: The number of retaining rings is two, and the two retaining rings are respectively located at both ends of the inner hole of the bushing, forming an axial limit for the bushing.

6. A continuously variable transmission clutch, characterized in that: Includes the movable wheel bushing structure as described in any one of claims 1 to 5.

7. A motorcycle, characterized in that: Including the continuously variable transmission clutch as described in claim 6.

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