Two-countershaft transmission with axial self-adaption and bevel gear transmission structure

Abstract

The invention relates to a two-countershaft transmission with axial self-adaption and a bevel gear transmission structure. The two-countershaft transmission comprises a main box input shaft, a main shaft, a main box countershaft, an auxiliary box countershaft, an output shaft and a gearbox body. The gearbox body comprises a main box and an auxiliary box, the side, with a spline, of the main box input shaft is arranged in the main box through a bearing, the spline of the input shaft is sleeved with a normal mesh bevel gear to be meshed with a bevel gear on the main box countershaft, the main shaft is arranged in the main box through a bearing and a bearing hole of the spline end of the input shaft, the main box countershaft is arranged in the main box through a bearing, and all gear inclined teeth fastened on the main box countershaft are meshed with floating inclined teeth on the main shaft respectively. Inclined teeth arranged on the spline of the tail end of the main shaft in a sleeving mode are driving teeth of the auxiliary box, and are meshed with large inclined teeth on the auxiliary box countershaft, and the other inclined teeth of the auxiliary box countershaft are meshed with low-speed inclined teeth on the output shaft of the auxiliary box. The two-countershaft transmission has the advantages of prolonging the service life of a synchronizer, and being good in gear shifting quality and low in gear shifting noise.

Description

technical field [0001] The invention belongs to the technical field of auto parts, and relates to a vehicle not only suitable for heavy-duty vehicles, heavy-duty container tractors, dump trucks, truck cranes, various special-purpose vehicles and special vehicles, but also suitable for supporting large passenger vehicles and city buses. An axially self-adaptive double countershaft transmission with a helical gear transmission structure. Background technique [0002] Most of the existing double countershaft transmissions adopt the structure of the main and auxiliary boxes with double countershafts: in the main box, the main shaft and its upper gear adopt the principle of radial floating to achieve the load distribution of the two countershafts. Due to the principle of radial floating, it will inevitably cause partial contact between the synchronizer and the synchronous cone, so the friction force is small and the synchronous torque is not enough. Local friction may easily ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a gear with helical gear transmission structure that adopts the principle of axial floating of the intermediate shaft and self-adaptation to achieve uniform load distribution of the double intermediate shafts, good shifting quality, and low shifting noise. Axially self-adaptive double countershaft transmission, which solves the problem of easy local contact between the synchronizer and the synchronous cone when shifting gears, and improves the service life of the synchronizer. It improves the gear alignment accuracy of the intermediate shaft of the auxiliary box and ensures the fatigue life of the gears

Images