A motorcycle clutch primary cover assembly

Abstract

The utility model belongs to motorcycle clutch technical field, concretely relates to a motorcycle clutch primary cover combination structure, include: clutch cover, pinion and torsion spring, the clutch cover top center is provided with the axle cylinder, the axle cylinder upper half cylinder body is firmly equipped with the driving gear, include: the assembling cylinder, the assembling cylinder is firmly equipped at the driving gear top center department, limit structure, limit structure sets up on the assembling cylinder outer periphery, flange disc, flange disc detachably sets up at the assembling cylinder top, positioning structure, positioning structure sets up at the assembling cylinder outer periphery and pinion top, is used to solve the primary cover combination component product in use, the sleeve 105 is easy to appear the problem of loosening and falling off, causes pinion 104, sleeve 105, torsion spring 106 assembly unreliable, and when the sleeve 105 is suppressed in the axial unnecessary, the bottom of sleeve 105 is suppressed in pinion 104 top, still easy to appear pinion 104 is suppressed and stuck phenomenon.

Description

Technical Field

[0001] This utility model belongs to the field of motorcycle clutch technology, specifically relating to a primary outer cover assembly structure for a motorcycle clutch. Background Technology

[0002] The primary clutch assembly (also known as a centrifugal clutch or automatic clutch) on a motorcycle is a crucial component in automatic transmission motorcycles (such as scooters / mopeds), underbone motorcycles, and some ATVs, off-road motorcycles, and scooters. Its main function is to automatically connect or disconnect the power transmission from the engine crankshaft to the gearbox based on the engine speed, without requiring the rider to manually operate the clutch lever. A very important component in the primary clutch assembly is the primary cover assembly.

[0003] For example Figure 4 As shown, the assembly includes a clutch cover 101, a shaft sleeve 102, a drive gear 103 fixed on the upper half of the shaft sleeve 102, a secondary gear 104 rotatably sleeved on the shaft sleeve 102 above the top of the drive gear 103, and a retaining sleeve 105 tightly sleeved on the shaft sleeve 102 above the top of the secondary gear 104. The upper half of the retaining sleeve 105 is tightly sleeved on the shaft sleeve 102, and the lower half of the retaining sleeve 105 is spaced apart from the outer peripheral wall of the shaft sleeve 102. A torsion spring 106 is sleeved on the shaft sleeve 102 within the spaced area. The upper end of the torsion spring 106 is engaged in the transverse wall at the intersection of the upper and lower halves of the retaining sleeve 105, and the lower end of the torsion spring 106 is engaged in the retaining hole 302 at the top of the secondary gear 104. Finally, the secondary gear 104, the retaining sleeve 105, and the torsion spring 106 are assembled.

[0004] However, during use, the ferrule 105 is prone to loosening and falling off, resulting in unreliable assembly of the secondary gear 104, ferrule 105, and torsion spring 106. Furthermore, when the ferrule 105 is subjected to unnecessary axial pressure, the bottom of the ferrule 105 presses against the top of the secondary gear 104, which can easily cause the secondary gear 104 to be pressed and jammed. Utility Model Content

[0005] Based on the problems mentioned in the background technology above, this utility model provides a primary outer cover assembly structure for a motorcycle clutch, which solves the problem that in the use of existing primary outer cover assembly products, the ferrule 105 is prone to loosening and falling off, resulting in unreliable assembly of the secondary gear 104, ferrule 105, and torsion spring 106. Furthermore, when the ferrule 105 is subjected to unnecessary axial pressure, the bottom of the ferrule 105 presses against the top of the secondary gear 104, which can easily cause the secondary gear 104 to be pressed and jammed.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A primary cover assembly structure for a motorcycle clutch includes: a clutch cover, a secondary gear, and a torsion spring. A shaft sleeve is disposed at the center of the top of the clutch cover, and a drive gear is fixedly mounted on the upper half of the shaft sleeve.

[0008] An assembly cylinder is fixed at the center of the top of the drive gear, and the radial dimension of the assembly cylinder is smaller than the radial dimension of the shaft cylinder.

[0009] A limiting structure is provided on the outer periphery of the assembly cylinder, and the auxiliary gear is rotatably sleeved on the outer periphery of the assembly cylinder between the top of the drive gear and the limiting structure.

[0010] A flange disk is detachably mounted on the top of the assembly cylinder. The radial dimension of the flange disk is the same as the radial dimension of the shaft cylinder. The torsion spring is sleeved on the outer periphery of the assembly cylinder located between the top of the auxiliary gear and the bottom of the flange disk.

[0011] A positioning structure is provided on the outer periphery of the assembly cylinder and the top of the auxiliary gear, which is used to limit the rotation of the torsion spring.

[0012] Based on the above technical solution, the present invention has made the following improvements:

[0013] Furthermore, the limiting structure includes an annular groove, which is disposed on the outer periphery of the assembly cylinder. An open retaining ring is detachably engaged in the annular groove. The open retaining ring can be pried open along the opening, and the secondary gear is located below the open retaining ring.

[0014] Furthermore, the positioning structure includes a first locking hole and a second locking hole. The first locking hole is located on the top of the auxiliary gear, and the second locking hole is located on the circumferential side wall of the assembly cylinder. The bottom locking post of the torsion spring is locked in the first locking hole, and the top locking post of the torsion spring is locked in the second locking hole.

[0015] Furthermore, three corresponding receiving grooves are arrayed on the periphery of the assembly cylinder and the periphery of the flange disk.

[0016] Furthermore, the inner wall of the top opening of the assembly cylinder is provided with threads, the bottom of the flange disk is provided with a downwardly extending cylinder, the outer peripheral wall of the cylinder at the bottom of the flange disk is provided with threads, and the cylinder at the bottom of the flange disk is screwed into the top opening of the assembly cylinder.

[0017] The beneficial effects of this utility model are:

[0018] 1. By combining the assembly cylinder, limiting structure, flange plate, and positioning structure, the secondary gear is fitted onto the assembly cylinder located between the driving gear and the limiting structure. Then, the torsion spring is fitted onto the assembly cylinder located between the secondary gear and the flange plate, and the positioning structure is used to limit the rotation of the torsion spring, thus completing the assembly of the secondary gear and the torsion spring. Using this assembly method, the retaining sleeve component can be eliminated, thus preventing the secondary gear from being jammed by the retaining sleeve.

[0019] 2. By detachably mounting the flange disc on the top of the assembly cylinder, the flange disc can be disassembled. After the flange disc is disassembled, the torsion spring and the auxiliary gear can be removed from the assembly cylinder.

[0020] 3. With multiple receiving slots, when only the torsion spring needs to be removed, the bottom retaining post of the torsion spring is taken out from the retaining hole one, and then the torsion spring is disassembled using three hook rods. During disassembly, the hook heads of the three hook rods are inserted into the corresponding receiving slots, and then the three hook rods are pulled away from the center of the assembly cylinder, so that the hook heads of the three hook rods pull the torsion spring radially, thereby expanding the radial dimension of the torsion spring. Then, it can be moved upward and directly removed over the flange plate, that is, it is not necessary to disassemble the flange plate first. Attached Figure Description

[0021] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0022] Figure 1 This utility model relates to a structure of a primary outer cover assembly for a motorcycle clutch. Figure 1 ;

[0023] Figure 2 This utility model relates to a structure of a primary outer cover assembly for a motorcycle clutch. Figure 2 ;

[0024] Figure 3 This is an exploded view of the primary outer cover assembly structure of a motorcycle clutch according to this utility model;

[0025] Figure 4 This is a structural diagram of the existing product described in the background section.

[0026] The attached diagram is labeled as follows:

[0027] 101. Clutch housing; 102. Shaft cylinder; 103. Drive gear; 104. Secondary gear; 105. Sleeve; 106. Torsion spring; 1060. Bottom stalk; 1061. Top stalk; 201. Assembly cylinder; 202. Flange disc; 301. Annular groove; 302. Open stalk ring; 401. Stalk hole one; 402. Stalk hole two; 501. Receiving groove. Detailed Implementation

[0028] like Figures 1-4 As shown, a primary cover assembly structure for a motorcycle clutch includes: a clutch cover 101, a secondary gear 104, and a torsion spring 106. A shaft sleeve 102 is disposed at the top center of the clutch cover 101, and a drive gear 103 is fixedly mounted on the upper half of the shaft sleeve 102.

[0029] Assembly cylinder 201 is fixed at the top center of the drive gear 103. Flange disk 202 has threads on the inner wall of the top opening of assembly cylinder 201 and a downwardly extending cylinder at the bottom of flange disk 202. The outer peripheral wall of the cylinder at the bottom of flange disk 202 has threads. The threads of the cylinder at the bottom of flange disk 202 are screwed into the top opening of assembly cylinder 201, thereby realizing the detachable mounting of flange disk 202 on the top of assembly cylinder 201.

[0030] The limiting structure is set on the outer periphery of the assembly cylinder 201. The limiting structure includes an annular groove 301. The annular groove 301 is set on the outer periphery of the assembly cylinder 201. An open retaining ring 302 is detachably engaged in the annular groove 301. The open retaining ring 302 has a certain elastic deformation, so that the open retaining ring 302 can be pried open along the opening. After the opening of the open retaining ring 302 is expanded, it can be engaged in the annular groove 301.

[0031] During assembly, the flange disc 202 is removed from the top of the assembly cylinder 201, and then the secondary gear 104 is fitted onto the assembly cylinder 201. Subsequently, the open retaining ring 302 is pried open along its opening to enlarge the opening of the open retaining ring 302. Then, the open retaining ring 302 is locked in the annular retaining groove 301, so that the secondary gear 104 is located below the open retaining ring 302. This allows the secondary gear 104 to be rotatably assembled onto the outer periphery of the assembly cylinder 201 located between the top of the driving gear 103 and the open retaining ring 302 in the limiting structure. The open retaining ring 302 serves to axially limit the secondary gear 104.

[0032] After the secondary gear 104 is assembled, the torsion spring 106 is fitted onto the assembly cylinder 201 located above the top of the secondary gear 104. Then, the flange disk 202 is assembled on the top of the assembly cylinder 201, so that the torsion spring 106 is restricted on the outer periphery of the assembly cylinder 201 between the top of the secondary gear 104 and the bottom of the flange disk 202. Since the radial dimension of the assembly cylinder 201 is smaller than the radial dimension of the shaft cylinder 102, and the radial dimension of the flange disk 202 is the same as the radial dimension of the shaft cylinder 102, the torsion spring 106 is housed below the flange disk 202, preventing the torsion spring 106 from extending radially outward from the flange disk 202.

[0033] The positioning structure is set on the outer periphery of the assembly cylinder 201 and the top of the auxiliary gear 104. The positioning structure includes a first locking hole 401 and a second locking hole 402. The first locking hole 401 is set on the top of the auxiliary gear 104, and the second locking hole 402 is set on the peripheral side wall of the assembly cylinder 201. When the torsion spring 106 is sleeved on the outer periphery of the assembly cylinder 201 between the top of the auxiliary gear 104 and the bottom of the flange disk 202, the bottom locking post 1060 of the bottom of the torsion spring 106 is locked in the first locking hole 401, and the top locking post 1061 of the top of the torsion spring 106 is locked in the second locking hole 402, thereby realizing the rotation limit of the torsion spring 106 and preventing the torsion spring 106 from rotating freely on the assembly cylinder 201.

[0034] By using this structure and method for assembly, the original retainer 105 can be discarded. When the retainer 105 is discarded, the secondary gear 104 and the torsion spring 106 can still maintain reliable assembly, and the secondary gear 104 will not be jammed by the retainer 105.

[0035] When it is necessary to disassemble the secondary gear 104 and the torsion spring 106, the flange plate 202 is removed from the top of the assembly cylinder 201, and the bottom retaining post 1060 of the torsion spring 106 is pulled out from the first retaining hole 401 and the top retaining post 1061 is pulled out from the second retaining hole 402. The torsion spring 106 can then be removed from the assembly cylinder 201 by taking the open retaining ring 302 out of the annular retaining groove 301. The secondary gear 104 can then be removed upwards from the assembly cylinder 201.

[0036] The assembly cylinder 201 and the flange plate 202 are provided with three corresponding receiving slots 501. When only the torsion spring 106 needs to be removed, the bottom locking post 1060 of the torsion spring 106 is pulled out from the locking hole 401, and then the torsion spring 106 is disassembled using three hook rods. During disassembly, the hook heads of the three hook rods are vertically inserted into the corresponding receiving slots 501, and then the three hook rods are pulled away from the center of the assembly cylinder 201. As a result, the radial dimension of the torsion spring 106 is expanded under the radial pull of the three hook rods. At this time, the torsion spring 106 can be moved upward so that the torsion spring 106 can be directly removed over the flange plate 202. That is, it is not necessary to disassemble the flange plate 202 first and then disassemble the torsion spring 106.

[0037] The present invention has been described in detail above. The specific embodiments are provided only to help understand the method and core idea of ​​the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A primary cover assembly structure for a motorcycle clutch, comprising: The clutch housing (101), the auxiliary gear (104), and the torsion spring (106) are characterized by comprising: a shaft sleeve (102) at the top center of the clutch housing (101), and a drive gear (103) fixedly mounted on the upper half of the shaft sleeve (102). Assembly cylinder (201), the assembly cylinder (201) is fixed at the center of the top of the drive gear (103), and the radial dimension of the assembly cylinder (201) is smaller than the radial dimension of the shaft cylinder (102); A limiting structure is provided on the outer periphery of the assembly cylinder (201), and the auxiliary gear (104) is rotatably sleeved on the outer periphery of the assembly cylinder (201) between the top of the drive gear (103) and the limiting structure. A flange disk (202) is detachably mounted on the top of the assembly cylinder (201). The radial dimension of the flange disk (202) is the same as that of the shaft cylinder (102). The torsion spring (106) is sleeved on the outer periphery of the assembly cylinder (201) located between the top of the secondary gear (104) and the bottom of the flange disk (202). The positioning structure is located on the outer periphery of the assembly cylinder (201) and the top of the auxiliary gear (104) for limiting the rotation of the torsion spring (106).

2. The motorcycle clutch primary cover assembly structure according to claim 1, characterized in that: The limiting structure includes an annular groove (301), which is disposed on the outer periphery of the assembly cylinder (201). An open retaining ring (302) is detachably fitted inside the annular groove (301). The open retaining ring (302) can be pried open along the opening. The secondary gear (104) is located below the open retaining ring (302).

3. The motorcycle clutch primary cover assembly structure according to claim 1, characterized in that: The positioning structure includes a first locking hole (401) and a second locking hole (402). The first locking hole (401) is located on the top of the auxiliary gear (104), and the second locking hole (402) is located on the circumferential side wall of the assembly cylinder (201). The bottom locking post (1060) of the torsion spring (106) is locked in the first locking hole (401), and the top locking post (1061) of the torsion spring (106) is locked in the second locking hole (402).

4. The motorcycle clutch primary cover assembly structure according to claim 1, characterized in that: The assembly cylinder (201) and the flange disk (202) are provided with three corresponding receiving slots (501) arranged in an array on their periphery.

5. The motorcycle clutch primary cover assembly structure according to claim 1, characterized in that: The inner wall of the top opening of the assembly cylinder (201) is provided with threads, and the bottom of the flange disk (202) is provided with a downwardly extending cylinder body. The outer peripheral wall of the cylinder body at the bottom of the flange disk (202) is provided with threads, and the cylinder body at the bottom of the flange disk (202) is screwed into the top opening of the assembly cylinder (201).

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