CN102563016A - Spindle assembly for double-intermediate-shaft transmission - Google Patents

Abstract

A main shaft assembly for a double countershaft transmission. Its technical solution uses eight main shaft adjusting gaskets to realize the axial positioning of the gear on the main shaft, and realizes its radial positioning through the mutual meshing of the main shaft gear and the countershaft gear. It has a simple structure, strong bearing capacity, short axial length, Low noise; for double countershaft transmissions, the gears of the main shaft float radially on the main shaft, the axes of the main shaft and the auxiliary shaft are in the same plane, and the radial forces generated by the gear meshing cancel each other out, that is, the main shaft only transmits torque, The resultant force of radial force is zero. The positioning structure is simple, the bearing capacity is strong, and the durability is high, and the service life of the double intermediate shaft transmission is improved without increasing the cost.

Description

Main shaft assembly for double countershaft transmission

technical field

The present invention is a main shaft assembly for double countershaft transmission. the

Background technique

The transmission with double countershaft structure has the advantages of compact structure, small shifting force and long service life, and is widely used in road vehicles. The spindle assembly positioning structure currently used realizes the axial positioning of the spindle assembly through bearings, which has many parts, high price and complicated assembly.

Contents of the invention

The present invention aims at the deficiencies of the prior art, and provides a main shaft positioning structure, which is easy to install, has a low scrap rate, and has a long service life. The double intermediate shaft transmission adopting this positioning structure has reliable operation, fast shifting time, and fast shifting. Small force, etc., especially suitable for road vehicles.

The present invention is achieved through the following technical measures: a main shaft assembly for a double countershaft transmission, including a main shaft and several gears installed on the main shaft, the main shaft is provided with a long keyway suitable for the size of the main shaft, so A hexagonal key is installed in the long keyway, and the hexagonal key is axially positioned by the elastic cylindrical pin. The gear is installed on the main shaft through the hexagonal key, and the main shaft adjustment gaskets connected with the hexagonal key are installed on both sides of the gear. , the main shaft adjusting gasket axially locates the gear.

The specific features of the present invention are that the above-mentioned gears are axially positioned by the main shaft adjusting gasket and the hexagonal key, and the main shaft is successively equipped with the main shaft fourth gear gear, the main shaft third gear gear, the main shaft second gear gear, the main shaft first gear gear and the main shaft reverse gear. gear; the main shaft between the fourth gear of the main shaft and the third gear of the main shaft is equipped with a main shaft adjusting gasket, and the main shaft is arranged on the outer side of the fourth gear of the main shaft and the third gear of the main shaft; A main shaft adjusting gasket is installed on the main shaft between the second gear of the main shaft and the first gear of the main shaft; And the main shaft adjusting shims are arranged on both sides of the main shaft reverse gear.

The beneficial effect of the present invention is: the axial positioning of the main shaft assembly used in the double countershaft transmission is ensured by the mutual cooperation among the main shaft adjusting gasket, the main shaft, the hexagonal key and each gear of the main shaft, and the positioning method is simple and convenient.

The axial positioning of the main shaft gear of the double intermediate shaft transmission is realized by eight main shaft adjusting shims, and the radial positioning is realized by the mutual meshing of the main shaft gear and the countershaft gear. It has a simple structure, strong bearing capacity, and short axial length , low noise; for double countershaft transmissions, the gears of the main shaft float radially on the main shaft, the axes of the main and auxiliary shafts are in the same plane, and the radial forces generated by the meshing gears cancel each other out, that is, the main shaft only transmits torque , the resultant radial force is zero.

To sum up: the positioning structure is simple, the bearing capacity is strong, and the durability is high, and the service life of the double countershaft transmission is improved without increasing the cost.

Description of drawings

Fig. 1 is a schematic structural view of a main shaft assembly used in a double countershaft transmission in a specific embodiment of the present invention.

In the figure, 1. Reverse gear of the main shaft, 2. First gear of the main shaft, 3. Second gear of the main shaft, 4. Third gear of the main shaft, 5. Fourth gear of the main shaft, 6. Hexagon key, 7. Main shaft, 8. Elasticity Straight pin, 9, main shaft adjusting gasket.

Detailed ways

In order to clearly illustrate the technical features of the solution, the solution will be described below through a specific implementation manner.

As shown in the accompanying drawings, a main shaft assembly for a double countershaft transmission includes a main shaft, a number of gears mounted on the main shaft, etc., the main shaft is provided with a long keyway suitable for the size of the main shaft, and the long keyway A hexagonal key 6 is installed inside, and the hexagonal key 6 is axially positioned by the elastic cylindrical pin 8. The gear is installed on the main shaft through the hexagonal key 6, and the main shaft adjustment mated with the hexagonal key 6 is installed on both sides of the gear. The washer 9, the main shaft adjusting washer 9 axially locates the gear. Among them, the gear, the hexagonal key, the main shaft, the elastic cylindrical pin and the main shaft adjusting washer cooperate with each other to form a whole. Through the cooperation of the main shaft adjusting washer, each gear of the main shaft, the hexagonal key and the main shaft, the purpose of axial positioning is achieved. The structure is simple and Strong bearing capacity, short axial length and low noise.

Among them, through the axial positioning of the main shaft adjusting gasket 9 and the hexagonal key 6, the main shaft fourth gear gear 5, the main shaft third gear gear 4, the main shaft second gear gear 3, the main shaft first gear gear 2 and the main shaft reverse gear gear 1 are installed in sequence; A main shaft adjusting pad 9 is installed on the main shaft between the main shaft fourth gear gear 5 and the main shaft third gear gear 4, and a main shaft adjusting pad is arranged on the main shaft and outside the main shaft fourth gear gear 5 and the main shaft third gear gear 4 sheet 9; a main shaft adjusting gasket 9 is installed on the main shaft between the main shaft second gear 3 and the main shaft first gear 2, and a Main shaft adjustment shims 9 ; main shaft adjustment shims 9 are arranged on the main shaft and on both sides of the main shaft reverse gear 1 . It can be seen that the axial positioning of the five gears on the main shaft is realized by eight main shaft adjustment shims.

The shifting force is transmitted through the main shaft gear and the main shaft adjusting washer. Since the main shaft adjusting washer and the main shaft gear are installed on the main shaft, the force is finally transmitted to the main shaft. There is no relative movement between the gear and the main shaft adjusting washer, realizing the shaft orientation.

The radial force balance is achieved by the mutual meshing between the main and auxiliary shaft gears, and the resultant force of the radial force on the main shaft is zero, and only the torque is transmitted to realize radial positioning.

The undescribed technical features of the present invention can be realized by or using the prior art, and will not be repeated here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Those of ordinary skill in the art Changes, modifications, additions or substitutions made within the essential scope of the present invention shall also belong to the protection scope of the present invention. the

Claims (2)

1. A main shaft assembly for a double countershaft transmission, comprising a main shaft and several gears mounted on the main shaft, characterized in that the main shaft is provided with a long keyway suitable for the size of the main shaft, and inside the long keyway A hexagonal key is installed, and the hexagonal key is axially positioned by an elastic cylindrical pin. The gear is installed on the main shaft through the hexagonal key. The two sides of the gear are equipped with a main shaft adjusting gasket that is connected with the hexagonal key. The main shaft Adjusting shims position the gear axially. 2. A main shaft assembly for double countershaft transmission according to claim 1, characterized in that the gear is axially positioned by the main shaft adjusting washer and the hexagonal key, and the fourth gear gear of the main shaft is sequentially installed on the main shaft , the third gear of the main shaft, the second gear of the main shaft, the first gear of the main shaft and the reverse gear of the main shaft; the main shaft between the fourth gear of the main shaft and the third gear of the main shaft is equipped with a main shaft adjusting gasket, and the main shaft is located on the main shaft Main shaft fourth gear and main shaft third gear are provided with a main shaft adjusting gasket; the main shaft between the main shaft second gear and the main shaft first gear is equipped with a main shaft adjusting gasket, and the main shaft is located on the main shaft second gear A main shaft adjusting gasket is arranged on the outer side of the gear and the first gear of the main shaft; and a main shaft adjusting gasket is arranged on the main shaft and on both sides of the main shaft reverse gear.

Images