Motorcycle reverse gear main shaft and countershaft mechanism

Abstract

The utility model relates to the technical field of motorcycle engines, and discloses a motorcycle reverse gear main and auxiliary shaft mechanism which comprises a main shaft and an auxiliary shaft, five main shaft gear teeth are arranged on the main shaft, five auxiliary shaft gear teeth are arranged on the auxiliary shaft, and the motorcycle reverse gear main and auxiliary shaft mechanism is characterized in that a main shaft reverse gear tooth is fixedly arranged on the main shaft, and an auxiliary shaft reverse gear tooth is arranged on the auxiliary shaft in an empty sleeve mode. The main shaft reverse gear teeth are meshed with the auxiliary shaft reverse gear teeth, the main shaft reverse gear teeth and the auxiliary shaft reverse gear teeth are meshed with gear teeth on a reverse gear shaft at the same time, and the reverse gear shaft is located between the main shaft and the auxiliary shaft. The structural layout is compact, and the vehicle speed is more stable and faster.

Description

Technical Field

[0001] The utility model relates to the technical field of motorcycle engines, in particular to a reverse gear main and secondary shaft mechanism for a motorcycle. Background Art

[0002] The main and counter shafts of a motorcycle are installed in the gearbox, which are respectively equipped with a set of active transmission gears and driven transmission gears. The engine can shift between gears in conjunction with the shift fork, speed change cam, etc. The main shaft is generally also equipped with a clutch, and the counter shaft is the output shaft, which is equipped with a sprocket that drives the rear sprocket and rear wheel through a transmission chain to make the vehicle move.

[0003] Chinese document CN205118153U discloses a motorcycle shift transmission mechanism, comprising a main shaft and a countershaft, wherein the main shaft is provided with a first gear main tooth, a fifth gear main gear, a third and fourth gear main gear and a second gear main gear in sequence, the first gear main tooth and the second gear main gear are fixedly connected to the main shaft, the third and fourth gear main gears are splined to the main shaft, a first protrusion is provided on a side of the third and fourth gear main gears close to the fifth gear main gear, a first groove is provided on the fifth gear main gear, the fifth gear main gear is clearance-matched with the main shaft, and the countershaft is provided with a first gear counter gear, a fifth gear counter gear, a fourth gear counter gear, a third gear counter gear, a coupling sleeve and a second gear counter gear in sequence.

[0004] The prior art has the following disadvantages: the existing engine has a small internal volume, the gear teeth of the main shaft and the secondary shaft are not arranged compactly enough, and the reverse gear function cannot be realized. Utility Model Content

[0005] In order to solve the technical problem that the main shaft and the secondary shaft are not compact and cannot meet the reverse gear requirement, the utility model provides a motorcycle reverse gear main and secondary shaft mechanism, comprising a main shaft and a secondary shaft, wherein five main shaft gear teeth are arranged on the main shaft, and five secondary shaft gear teeth are arranged on the secondary shaft, and the utility model is characterized in that main shaft reverse gear teeth are fixedly arranged on the main shaft, secondary shaft reverse gear teeth are arranged in an empty sleeve on the secondary shaft, the main shaft reverse gear teeth mesh with the secondary shaft reverse gear teeth, the main shaft reverse gear teeth and the secondary shaft reverse gear teeth are meshed with the gear teeth on the reverse gear shaft at the same time, and the reverse gear shaft is located between the main shaft and the secondary shaft.

[0006] Preferably, the five main shaft gear teeth include main shaft first gear teeth, main shaft second gear teeth, main shaft third gear teeth, main shaft fourth gear teeth and main shaft fifth gear teeth. The main shaft first gear teeth are pressed onto the main shaft, the main shaft second gear teeth and main shaft third gear teeth are a whole and are connected to the main shaft via splines, and the main shaft fourth gear teeth and fifth gear teeth are loosely mounted on the main shaft.

[0007] Preferably, the five countershaft gear teeth include countershaft first gear teeth, countershaft second gear teeth, countershaft third gear teeth, countershaft fourth gear teeth and countershaft fifth gear teeth, and the countershaft first gear teeth, countershaft second gear teeth and countershaft third gear teeth are loosely mounted on the countershaft, and the countershaft fourth gear teeth and countershaft fifth gear teeth are spline-connected to the countershaft.

[0008] In order to facilitate the adjustment of the gear position, the fifth gear teeth of the secondary shaft are slidably arranged left and right along the axial direction between the first gear teeth of the secondary shaft and the second gear teeth of the secondary shaft, and the fifth gear teeth of the secondary shaft are slidably connected to the secondary shaft.

[0009] In order to further improve the compactness, the planes on both sides of the shaft body of the reverse gear shaft give way.

[0010] In order to avoid slippage and looseness, one end of the reverse shaft is positioned on the engine case through a pin hole to improve reliability.

[0011] The utility model has the following beneficial effects:

[0012] 1. The overall structure and layout are more compact. While achieving five gears in the same space, the reverse gear shaft is used to switch between reverse gear and forward gear, and the reverse gear function is also realized, increasing the utilization rate of the main shaft and the secondary shaft in a limited space.

[0013] 2. The transmission ratio of the fifth gear combined with the reverse gear is reasonable, with a smaller span, making the vehicle speed more stable when shifting gears. At the same time, the vehicle speed is faster and the driving comfort is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the main shaft of the utility model as a whole;

[0015] Figure 2 It is a schematic diagram of the overall secondary shaft of the utility model;

[0016] Figure 3 It is a schematic diagram of the whole reverse gear shaft of the present invention;

[0017] Figure 4 for Figure 3 Side view of. DETAILED DESCRIPTION

[0018] The following is further described in detail through specific implementation methods:

[0019] 1. The reference numerals in the drawings of the specification include: main shaft 1, counter shaft 2, main shaft reverse gear tooth 3, counter shaft reverse gear tooth 4, reverse gear shaft 5, gear tooth 6, main shaft first gear gear 7, main shaft second gear gear 8, main shaft third gear gear 9, main shaft fourth gear gear 10, main shaft fifth gear gear 11, counter shaft first gear gear 12, counter shaft second gear gear 13, counter shaft third gear gear 14, counter shaft fourth gear gear 15, counter shaft fifth gear gear 16, limiting groove 17, pin hole 18.

[0020] Example 1

[0021] like Figure 1-4As shown, it includes a main shaft 1 and a secondary shaft 2, the main shaft 1 is provided with five main shaft gear teeth, the secondary shaft 2 is provided with five secondary shaft gear teeth, the main shaft 1 is fixedly provided with a main shaft reverse gear tooth 3, the secondary shaft 2 is provided with a free sleeve with a secondary shaft reverse gear tooth 4, the main shaft reverse gear tooth 3 is meshed with the secondary shaft reverse gear tooth 4, the main shaft reverse gear tooth 3 and the secondary shaft reverse gear tooth 4 are simultaneously meshed with the gear tooth 6 on the reverse shaft 5, and the reverse shaft 5 is located between the main shaft 1 and the secondary shaft 2.

[0022] The five main shaft gear teeth include main shaft first gear teeth 7, main shaft second gear teeth 8, main shaft third gear teeth 9, main shaft fourth gear teeth 10 and main shaft fifth gear teeth 11. The main shaft first gear teeth 7 are pressed onto the main shaft 1, the main shaft second gear teeth 8 and the main shaft third gear teeth 9 are a whole and are connected to the main shaft 1 through splines, the main shaft fourth gear teeth 10 and the fifth gear teeth 6 are loosely mounted on the main shaft 1, and a gasket is provided between the main shaft fifth gear teeth 11 and the main shaft third gear teeth 9.

[0023] The five countershaft gear teeth include countershaft first gear teeth 12, countershaft second gear teeth 13, countershaft third gear teeth 14, countershaft fourth gear teeth 15 and countershaft fifth gear teeth 16. The countershaft first gear teeth 12, countershaft second gear teeth 13 and countershaft third gear teeth 14 are loosely sleeved on the countershaft 2, and the countershaft fourth gear teeth 15 and countershaft fifth gear teeth 16 are spline-connected with the countershaft 2.

[0024] The countershaft fifth gear tooth 16 is located between the countershaft first gear tooth 12 and the countershaft second gear tooth 13, and a limiting groove 17 is provided on the countershaft first gear tooth 12 and the countershaft second gear tooth 13. The left and right ends of the countershaft fifth gear tooth 16 respectively cooperate with the limiting groove 17 to realize that the countershaft fifth gear tooth 16 is axially slidably arranged between the countershaft first gear tooth 12 and the countershaft second gear tooth 13, and the countershaft fifth gear tooth 16 is slidably connected with the countershaft 2, so that the countershaft fifth gear tooth 16, the countershaft first gear tooth 12 and the countershaft second gear tooth 13 rotate on the countershaft 2.

[0025] The planes on both sides of the shaft body of the reverse gear shaft 5 give way, that is, a part of the two sides of the shaft body of the reverse gear shaft 5 is cut off to form a plane, thereby reducing the volume share from both sides of the reverse gear shaft 5. Under the premise of not affecting the main shaft 1 and the secondary shaft 2, the installation requirements are met, and one end of the reverse gear shaft 5 is positioned on the engine case through the pin hole 18.

[0026] The above is only an embodiment of the utility model. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the utility model before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for the technicians in this field, without departing from the structure of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, which will not affect the effect of the implementation of the utility model and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to explain the content of the claims.

Claims

1. A motorcycle reverse gear main and countershaft mechanism, comprising a main shaft (1) and a countershaft (2), wherein the main shaft (1) is provided with five main shaft gear teeth, and the countershaft (2) is provided with five countershaft gear teeth, characterized in that: The main shaft (1) is fixedly provided with a main shaft reverse gear (3), the secondary shaft (2) is sleeved with a secondary shaft reverse gear (4), the main shaft reverse gear (3) meshes with the secondary shaft reverse gear (4), the main shaft reverse gear (3) and the secondary shaft reverse gear (4) simultaneously mesh with gear teeth (6) on a reverse gear shaft (5), and the reverse gear shaft (5) is located between the main shaft (1) and the secondary shaft (2).

2. The motorcycle reverse gear main and secondary shaft mechanism according to claim 1, characterized in that: The five main shaft gear teeth include main shaft first gear teeth (7), main shaft second gear teeth (8), main shaft third gear teeth (9), main shaft fourth gear teeth (10) and main shaft fifth gear teeth (11), wherein the main shaft first gear teeth (7) are press-fitted onto the main shaft (1), the main shaft second gear teeth (8) and the main shaft third gear teeth (9) are integrally formed and connected to the main shaft (1) via splines, and the main shaft fourth gear teeth (10) and fifth gear teeth (6) are loosely mounted on the main shaft (1).

3. The motorcycle reverse gear main and secondary shaft mechanism according to claim 2, characterized in that: The five countershaft gear teeth include countershaft first gear teeth (12), countershaft second gear teeth (13), countershaft third gear teeth (14), countershaft fourth gear teeth (15) and countershaft fifth gear teeth (16); the countershaft first gear teeth (12), countershaft second gear teeth (13) and countershaft third gear teeth (14) are loosely mounted on the countershaft (2); the countershaft fourth gear teeth (15) and countershaft fifth gear teeth (16) are spline-connected to the countershaft (2).

4. The motorcycle reverse gear main and secondary shaft mechanism according to claim 3, characterized in that: The countershaft fifth gear teeth (16) are axially slidably arranged between the countershaft first gear teeth (12) and the countershaft second gear teeth (13) to the left and right, and the countershaft fifth gear teeth (16) are slidably connected to the countershaft (2).

5. The motorcycle reverse gear main and secondary shaft mechanism according to claim 4, characterized in that: The planes on both sides of the shaft body of the reverse gear shaft (5) give way.

6. The motorcycle reverse gear main and secondary shaft mechanism according to any one of claims 1 to 5, characterized in that: One end of the reverse gear shaft (5) is positioned on the engine case through a pin hole (18).

Images