Motorcycle driving system and motorcycle

Abstract

The motorcycle driving system comprises an engine and a continuously variable transmission, the continuously variable transmission comprises a driving wheel assembly and a driven wheel assembly, the driving wheel assembly is used for receiving power of a crankshaft of the engine and transmitting the power to the driven wheel assembly, and the driven wheel assembly comprises a driven wheel fixed disc and a driven wheel movable disc; the centrifugal clutch is arranged on the side close to the driven wheel fixed disc and used for receiving or disconnecting power of the driven wheel assembly. According to the motorcycle driving system and the motorcycle, the use requirement of the parallel double-cylinder engine motorcycle can be met, the whole structure of the motorcycle is compact, meanwhile, the width of the left side of the crankcase can be reduced, the gravity center of the engine is closer to the center of a frame, and therefore the controllability and comfort of the whole motorcycle are good.

Description

Technical Field

[0001] The utility model relates to the technical field of motorcycles, and particularly relates to a motorcycle drive system and a motorcycle Background Technique

[0002] As a means of transportation for commuting and leisure travel, motorcycles are favored by motorcycle riders due to their simple operation methods. However, with the improvement of people's living standards, users have higher and higher requirements for the power performance, handling performance and comfort of motorcycles. A continuously variable transmission and a clutch are assembled in the crankcase of the motorcycle engine. When the clutch is assembled, it is generally located on the outermost side of the vehicle body relative to the vehicle body. This assembly structure requires a large space in the crankcase body and is often applicable to the drive system of single-cylinder motorcycles. For an in-line twin-cylinder engine, adopting this assembly method will cause the overall left and right width of the vehicle to be too large. To meet the bending angle, the engine needs to be assembled at a high position.

[0003] Therefore, it is urgent to develop a motorcycle drive system and a motorcycle that can meet the use needs of in-line twin-cylinder engine motorcycles, make the overall structure of the motorcycle compact, and at the same time can reduce the left width of the crankcase, so that the center of gravity of the engine is closer to the center of the frame, thereby improving the handling performance and comfort of the whole vehicle. Summary of the Invention

[0004] In view of this, the purpose of the utility model is to provide a motorcycle drive system and a motorcycle that can meet the use needs of in-line twin-cylinder engine motorcycles, make the overall structure of the motorcycle compact, and at the same time can reduce the left width of the crankcase, so that the center of gravity of the engine is closer to the center of the frame, thereby improving the handling performance and comfort of the whole vehicle.

[0005] The motorcycle drive system of the utility model includes an engine and a continuously variable transmission. The continuously variable transmission includes a driving wheel assembly and a driven wheel assembly. The driving wheel assembly is used to receive the power of the crankshaft of the engine and transmit it to the driven wheel assembly. The driven wheel assembly includes a driven wheel fixed disk and a driven wheel movable disk;

[0006] It further includes a centrifugal clutch. The centrifugal clutch is arranged on one side close to the driven wheel fixed disk to receive or disconnect the power of the driven wheel assembly; the centrifugal clutch is arranged on one side close to the driven wheel fixed disk, so as to shorten the left-right width of the crankcase, so that the center of gravity of the engine is close to the center of the frame, making the motorcycle have better handling performance and comfort.

[0007] Further, it further includes a driven wheel shaft. The driven wheel assembly is sleeved on the driven wheel shaft. The centrifugal clutch includes a friction disc. The friction disc is in transmission cooperation with the driven wheel shaft through a key connection and there is a set gap between the friction disc and the driven wheel shaft. The friction disc is in transmission cooperation with the driven wheel shaft through a key connection and there is a set gap between the friction disc and the driven wheel shaft, which is convenient for the assembly and subsequent disassembly of the friction disc.

[0008] Further, the friction disc includes a friction disc body and a bushing. The friction disc body is sleeved on the driven wheel shaft through the bushing.

[0009] On one side of the bushing close to the driven wheel fixed disc, a gasket I and a fastener I are sequentially installed to fixedly connect the friction disc body with the driven wheel shaft. The friction disc body is installed on the crankshaft through the bushing, which can make the operation stable.

[0010] Further, the driving wheel assembly includes a driving wheel fixed disc fixed on the crankshaft, a driving shaft sleeve arranged inside the driving wheel fixed disc and sleeved loosely on the crankshaft, and a driving wheel moving disc sleeved loosely on the driving shaft sleeve. The driving wheel moving disc can be operably reciprocated along the axial direction of the driving shaft sleeve.

[0011] On one side of the driven wheel fixed disc close to the driven wheel moving disc, a journal is provided. The driven wheel moving disc is sleeved on the journal of the driven wheel fixed disc. An elastic member is arranged on the outer side of the driven wheel moving disc. The journal is sleeved on the driven wheel shaft.

[0012] Further, it further includes a shoe mechanism, which is sleeved on the driven wheel shaft and arranged between the friction disc and the driven wheel fixed disc. It includes a pressing plate and a plurality of centrifugal blocks arranged on the pressing plate and sequentially connected end to end through springs. Friction plates are arranged on the outside of the centrifugal blocks. The shoe mechanism is connected to the driven wheel fixed disc, so that the plurality of centrifugal blocks can be operably contacted with or away from the friction disc. By setting the shoe mechanism, when the engine reaches a certain speed, it will be combined with the friction disc to achieve power transmission, thus eliminating the need to set up additional driving components.

[0013] Further, it further includes a sealing assembly, including an oil seal and a sealing ring I. A bushing is installed on one side of the bushing away from the driven wheel fixed disc. The sealing ring I is arranged on the inner circumference of the bushing. The oil seal is arranged on the outer circumference of the bushing.

[0014] A support bearing I is installed on one side of the bushing away from the friction disc. The support bearing I is provided to support the driven wheel shaft. At the same time, the sealing assembly is set up to form a seal and prevent the engine oil in the gear transmission cavity from leaking.

[0015] Further, it also includes a locking support assembly, including a washer I, a fastener II and a support bearing II, the support bearing II is sleeved on the outer circumference of the journal, and is used to support the driven wheel assembly in the chamber, the washer I and the fastener II are arranged between the driven wheel shaft and the journal, and the washer I and the fastener II are installed on the driven wheel shaft;

[0016] A limiting protrusion is provided on the inner wall of the chamber, and the limiting protrusion is arranged below the fastener II; the limiting protrusion can prevent the fastener II from loosening and sliding out, thereby improving the safety of engine operation.

[0017] Furthermore, it also includes a sealing ring II, which is arranged on the outer circumference of the shaft neck and located between the shaft neck and the support bearing II; the sealing ring II can form auxiliary support for the driven wheel assembly.

[0018] Furthermore, it also includes a driving wheel fixing assembly, which is arranged on the side of the driving wheel fixed plate away from the driving wheel moving plate, and includes a washer II, a gasket II and a fastener III arranged in sequence, and is used to fix the driving wheel fixed plate to the crankshaft;

[0019] It also includes a support bearing III, which is arranged on the outside of the fastener III and is sleeved on the crankshaft to support the crankshaft on the crankcase; the support bearing III is arranged to support the crankshaft to ensure smooth operation.

[0020] The utility model discloses a motorcycle, comprising the motorcycle driving system.

[0021] Beneficial effects of the utility model: The motorcycle drive system and the motorcycle of the utility model can meet the use needs of parallel twin-cylinder engine motorcycles. Compared with the drive system in the prior art, by installing the centrifugal clutch on the side close to the frame, the left width of the crankcase can be shortened, so that the center of the engine is closer to the center of the frame, thereby improving the controllability and comfort of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0023] Figure 1 It is a structural schematic diagram of the utility model;

[0024] Figure 2 It is a schematic diagram of the assembly of the centrifugal clutch and the driven wheel assembly;

[0025] Figure 3 for Figure 1 A partial enlarged view of

[0026] The above drawings contain the following reference numerals:

[0027] 1. Crankshaft; 2. Driving disc of the driving wheel; 3. Belt; 4. Crankcase; 5. Driven wheel shaft; 6. Fixed disc of the driven wheel; 7. Crankcase cover; 7a. Limiting projection; 8. Support bearing II; 9. Support bearing III; 10. Fastener III; 11. Gasket II; 12. Washer II; 13. Support bearing I; 14. Bushing; 15. Seal ring I; 16. Oil seal; 17. Friction disc; 18. Gasket I; 19. Fastener I; 20. Centrifugal block; 21. Washer I; 22. Fastener II; 23. Seal ring II; 24. Transmission cavity; 25. Driving disc of the driven wheel; 26. Fixed disc of the driving wheel; 27. Support bearing IV; 28. Support bearing V. Specific implementation manner

[0028] Figure 1 is a structural schematic diagram of the present utility model, Figure 2 is an assembly schematic diagram of the centrifugal clutch and the driven wheel assembly, Figure 3 is Figure 1 a partial enlarged view of, as Figures 1-3 shown: The motorcycle drive system of this embodiment includes an engine and a continuously variable transmission. The continuously variable transmission includes a driving wheel assembly and a driven wheel assembly. The driving wheel assembly is used to receive the power of the crankshaft 1 of the engine and transmit it to the driven wheel assembly. The driven wheel assembly includes a fixed disc 6 of the driven wheel and a driving disc 25 of the driven wheel. The driving wheel assembly receives the power of the crankshaft 1 and transmits it to the driven wheel assembly through a belt 3;

[0029] It further includes a centrifugal clutch. The centrifugal clutch is arranged on one side close to the fixed disc 6 of the driven wheel to receive or disconnect the power of the driven wheel assembly. The continuously variable transmission and the centrifugal clutch are assembled in the crankcase 4. The centrifugal clutch is arranged on one side of the fixed disc 6 of the driven wheel (i.e., between the driven wheel assembly and the vehicle frame), so that the inner space can be fully utilized successfully, and the left width of the crankcase 4 can be shortened (relative to the left - right direction of the motorcycle). Thus, after assembly and installation, the center of gravity of the engine can be closer to the center of the vehicle frame, meeting the requirements of the vehicle's handling performance and comfort.

[0030] In the prior art, a continuously variable transmission and a clutch are assembled in the crankcase 4 of a motorcycle engine. When assembling the clutch, generally, it is located on the outermost side of the vehicle body relative to the vehicle body. Such an assembly structure requires a larger space in the crankcase 4 body and is often applicable to the drive system of single - cylinder motorcycles. For a parallel twin - cylinder engine, adopting such an assembly method will result in an excessive left - right width of the whole vehicle. To meet the bending angle, the engine needs to be assembled at a high position. The motorcycle drive system and the motorcycle of the present utility model can meet the usage requirements of parallel twin - cylinder engine motorcycles. Compared with the drive system in the prior art, by installing the centrifugal clutch on the side close to the vehicle frame, the left width of the crankcase 4 can be shortened, making the center of the engine closer to the center of the vehicle frame, thereby improving the handling performance and comfort of the whole vehicle.

[0031] In this embodiment, it further includes a driven wheel shaft 5. The driven wheel assembly is sleeved on the driven wheel shaft 5. The centrifugal clutch includes a friction disc 17. The friction disc 17 is in transmission cooperation with the driven wheel shaft 5 through key connection and there is a set gap between the friction disc 17 and the driven wheel shaft 5. The driven wheel assembly is installed on the driven wheel shaft 5 through a support bearing IV 27 and a support bearing V 28. The driven wheel shaft 5 is press-fitted into the bearing hole of the crankcase 4 body. The friction disc 17 is in transmission cooperation with the driven wheel shaft 5 through key connection (it can be through spline connection) and is in clearance fit with the driven wheel shaft 5. Thus, compared with the interference fit of the prior art in the overall assembly of the centrifugal clutch, through the way of spline clearance fit, the centrifugal clutch is easier to assemble during assembly, and it is more convenient to disassemble and assemble during subsequent maintenance, greatly reducing the probability of damaging the driven wheel shaft 5 during disassembly and assembly. At the same time, it can also reduce the overall assembly difficulty of the motorcycle drive system, and the motorcycle drive system does not require high-position assembly. During use, the driven wheel shaft 5 transmits power to the gear transmission cavity 24 through a gear, and transmits the power to the motorcycle rear wheel through the gear transmission cavity 24.

[0032] In this embodiment, the friction disc 17 includes a friction disc body and a shaft sleeve. The friction disc body is sleeved on the driven wheel shaft 5 through the shaft sleeve. The friction disc body is in transmission cooperation with the driven wheel shaft 5 through the shaft sleeve, which can make the power transmission more stable and reliable.

[0033] On one side of the shaft sleeve close to the driven wheel fixed disc 6, a gasket I 18 and a fastener I 19 are sequentially installed for fixedly connecting the friction disc 17 and the driven wheel shaft 5. On one side of the shaft sleeve close to the driven wheel fixed disc 6 (i.e., the outer side relative to the vehicle body), a gasket I 18 and a fastener I 19 are sequentially installed. The fastener I 19 is a nut, thus fastening the friction disc body to the driven wheel shaft 5.

[0034] In this embodiment, the driving wheel assembly includes a driving wheel fixed disc 26 fixed on the crankshaft 1, a driving shaft sleeve arranged inside the driving wheel fixed disc 26 and sleeved on the crankshaft 1 loosely, and a driving wheel moving disc 2 sleeved on the driving shaft sleeve loosely. The driving wheel moving disc 2 can be operatively reciprocated along the axial direction of the driving shaft sleeve.

[0035] On one side of the driven wheel fixed disc 6 close to the driven wheel moving disc 25, there is a journal. The driven wheel moving disc 25 is sleeved on the journal of the driven wheel fixed disc 6. An elastic member is arranged on the outer side of the driven wheel moving disc 25. The journal is sleeved on the driven wheel shaft 5. In this structure, through the cooperation of the driving wheel moving disc 2, the driving wheel fixed disc 26, the belt 3, the driven wheel moving disc 25, the driven wheel fixed disc 6 and the elastic member (the elastic member is a spring), power transmission and speed change adjustment are realized. The cooperation of the driving wheel assembly and the driven wheel assembly is the application of the prior art and will not be elaborated here.

[0036] In this embodiment, it further includes a shoe block mechanism, which is sleeved on the driven wheel shaft 5 and disposed between the friction disc 17 and the driven wheel fixed disc 6. The shoe block mechanism includes a pressure plate and a plurality of centrifugal blocks 20 arranged on the pressure plate and connected end to end in sequence through springs. A friction plate is disposed outside the centrifugal blocks 20. The shoe block mechanism is connected to the driven wheel fixed disc 6, so that the plurality of centrifugal blocks 20 can be operably contacted with or away from the friction disc 17. The plurality of centrifugal blocks 20 are connected end to end in sequence through springs and fixedly installed on the pressure plate, and the shoe block mechanism is connected to the driven wheel fixed disc 6. Thus, through the action of the centrifugal blocks 20, the power of the driven wheel assembly can be transmitted to the friction disc 17, and then the friction disc 17 can transmit the power to the motorcycle rear wheel. The structure of the shoe block mechanism is an application of the prior art and will not be elaborated here.

[0037] In this embodiment, it further includes a sealing assembly, which includes an oil seal 16 and a sealing ring Ⅰ15. A bushing 14 is installed on one side of the shaft sleeve away from the driven wheel fixed disc 6. The sealing ring Ⅰ15 is disposed on the inner circumference of the bushing 14, and the oil seal 16 is disposed on the outer circumference of the bushing 14. By providing the oil seal 16 and the sealing ring Ⅰ15, the oil seal 16 and the sealing ring Ⅰ15 are respectively disposed on the outer circumference and the inner circumference of the bushing 14, and the bushing 14 is in interference fit with the oil seal 16 and the sealing ring Ⅰ15, so that the sealing of the engine oil in the gear transmission cavity 24 can be achieved.

[0038] A support bearing Ⅰ13 is installed on one side of the bushing 14 away from the friction disc 17. A support bearing Ⅰ13 is installed on one side of the bushing 14 away from the friction disc 17 (i.e., the side close to the vehicle frame). The support bearing Ⅰ13 is installed on the driven wheel shaft 5 and can support it, making the operation more stable.

[0039] In this embodiment, it further includes a locking and supporting assembly, which includes a washer Ⅰ21, a fastener Ⅱ22 and a support bearing Ⅱ8. The support bearing Ⅱ8 is sleeved on the outer circumference of the journal and is used to support the driven wheel assembly in the cavity. The washer Ⅰ21 and the fastener Ⅱ22 are disposed between the driven wheel shaft 5 and the journal, and the washer Ⅰ21 and the fastener Ⅱ22 are installed on the driven wheel shaft 5. The fastener Ⅱ22 is a nut. The support bearing Ⅱ8 is disposed at the end of the journal (i.e., the end close to the crankcase cover 7) and forms a support for the driven wheel assembly, which can make the operation more stable and not easily worn. The cavity is the continuously variable transmission cavity in the crankcase 4. The washer Ⅰ21 and the fastener Ⅱ22 are sequentially installed on the driven wheel shaft 5 to fasten the driven wheel assembly to the driven wheel shaft 5. The structures of the driven wheel moving disc 25 and the driven wheel fixed disc 6 are applications of the prior art and will not be elaborated here.

[0040] On the inner wall of the chamber, there is a limit projection 7a, and the limit projection 7a is arranged below the fastener II 22; the limit projection 7a is relatively located at the end of the driven wheel shaft 5 and at the same time below the fastener II 22 (relative to the up and down direction in the figure), which can prevent the fastener II 22 from slipping out after loosening and improve the safety of the engine operation.

[0041] In this embodiment, there is also a seal ring II 23, and the seal ring II 23 is arranged on the outer circumference of the journal and between the journal and the support bearing II 8; arranging the seal ring II 23 on the outer circumference of the journal and between the journal and the support bearing II 8 can form a seal and also provide auxiliary support for the driven wheel assembly.

[0042] In this embodiment, there is also a driving wheel fixing assembly, which is arranged on the side of the driving wheel fixed plate 26 away from the driving wheel moving plate 2, and includes a washer II 12, a gasket II and a fastener III 10 arranged in sequence, and is used to fixedly connect the driving wheel fixed plate 26 with the crankshaft 1; the driving wheel fixing assembly is arranged on the outside of the driving wheel fixed plate 26 (on the left side relative to the left and right direction of the vehicle frame), and the fastener III 10 is a nut;

[0043] There is also a support bearing III 9, which is arranged outside the fastener III 10 and sleeved on the crankshaft 1 to support the crankshaft 1 on the crankcase 4; through the cooperation of the washer II 12, the gasket II and the fastener III 10, the driving wheel assembly is fastened on the crankshaft 1, and the support bearing III 9 is arranged on the left side of the fastener III 10, so that the crankshaft 1 can be supported on the crankcase 4.

[0044] A motorcycle of this embodiment includes the motorcycle drive system described above.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A motorcycle drive system, characterized in that: It includes an engine and a continuously variable transmission, wherein the continuously variable transmission includes a driving wheel assembly and a driven wheel assembly, wherein the driving wheel assembly is used to receive power from a crankshaft of the engine and transmit it to the driven wheel assembly, wherein the driven wheel assembly includes a driven wheel fixed plate and a driven wheel driven plate; It also includes a centrifugal clutch, which is arranged on a side close to the driven wheel fixed plate and is used to receive or disconnect the power of the driven wheel assembly.

2. The motorcycle driving system according to claim 1, characterized in that: It also includes a driven wheel shaft, the driven wheel assembly is sleeved on the driven wheel shaft, and the centrifugal clutch includes a friction disk, which is key-connected and transmission-matched with the driven wheel shaft and has a set gap with the driven wheel shaft.

3. The motorcycle driving system according to claim 2, characterized in that: The friction disc comprises a friction disc body and a shaft sleeve, and the friction disc body is sleeved on the driven wheel shaft through the shaft sleeve; A gasket I and a fastener I are sequentially installed on one side of the shaft sleeve close to the driven wheel fixed plate, which are used to fix the friction plate body to the driven wheel shaft.

4. The motorcycle driving system according to claim 1, characterized in that: The driving wheel assembly comprises a driving wheel fixed plate fixed on the crankshaft, a driving shaft sleeve arranged inside the driving wheel fixed plate and freely sleeved on the crankshaft, and a driving wheel disk freely sleeved on the driving shaft sleeve, wherein the driving wheel disk can be operated to reciprocate along the axial direction of the driving shaft sleeve; A journal is provided on one side of the driven wheel fixed plate close to the driven wheel driven plate, the driven wheel driven plate is sleeved on the journal of the driven wheel fixed plate, an elastic member is provided on the outer side of the driven wheel driven plate, and the journal is sleeved on the driven wheel shaft.

5. The motorcycle driving system according to claim 2, characterized in that: It also includes a shoe mechanism, which is sleeved on the driven wheel shaft and arranged between the friction disk and the driven wheel fixed disk, including a pressure plate and a plurality of centrifugal blocks arranged on the pressure plate and connected end to end in sequence by springs, a friction plate is arranged on the outside of the centrifugal block, and the shoe mechanism is connected to the driven wheel fixed disk, so that the plurality of centrifugal blocks can be operated to contact the friction disk or stay away from the friction disk.

6. The motorcycle driving system according to claim 3, characterized in that: It also includes a sealing assembly, including an oil seal and a sealing ring I, a bushing is installed on the side of the shaft sleeve away from the driven wheel fixed plate, the sealing ring I is arranged on the inner circumference of the bushing, and the oil seal is arranged on the outer circumference of the bushing; A support bearing I is installed on the side of the bushing away from the friction disc.

7. The motorcycle driving system according to claim 4, characterized in that: It also includes a locking support assembly, including a washer I, a fastener II and a support bearing II, wherein the support bearing II is sleeved on the outer circumference of the journal and is used to support the driven wheel assembly in the chamber, the washer I and the fastener II are arranged between the driven wheel shaft and the journal, and the washer I and the fastener II are installed on the driven wheel shaft; A limiting protrusion is provided on the inner wall of the chamber, and the limiting protrusion is arranged below the fastener II.

8. The motorcycle driving system according to claim 7, characterized in that: It also includes a sealing ring II, which is arranged on the outer circumference of the journal and located between the journal and the supporting bearing II.

9. The motorcycle driving system according to claim 4, characterized in that: It also includes a driving wheel fixing assembly, which is arranged on the side of the driving wheel fixed plate away from the driving wheel moving plate, and includes a washer II, a gasket II and a fastener III arranged in sequence, and is used to fix the driving wheel fixed plate to the crankshaft; It also includes a support bearing III, which is arranged on the outside of the fastener III and is sleeved on the crankshaft to support the crankshaft on the crankcase.

10. A motorcycle, characterized in that: A motorcycle drive system comprising any one of claims 1-9.

Images