Device for simultaneously ensuring uniform load of transmission with double intermediate shafts and left and right concentricity of synchronizer

Abstract

The invention relates to a device for simultaneously ensuring uniform load of a transmission with double intermediate shafts and left and right concentricity of a synchronizer. The device comprises an input shaft, a normally engaged gear, joint teeth of the normally engaged gear, joint teeth of an all-gear output shaft gear, the all-gear output shaft gear and an output shaft, wherein the all-gear output shaft gear intermittently floats on the joint teeth of the all-gear output shaft gear through a spline; the joint teeth of the all-gear output shaft gear are centered on the output shaft through a needle roller bearing so as to ensure the characteristic of coaxiality of a synchronizer cone ring and two conical surfaces of the left and right joint teeth; the normally engaged gear intermittently floats on the input shaft; and the joint teeth of the normally engaged gear are centered on the input shaft. By split structural design of the output shaft gear and the gear shifting joint teeth, radial positioning of the gear shifting joint teeth on the shaft is ensured at the same time of ensuring radial floating of the output shaft gear, and uniform load of the double intermediate shafts and left and right concentricity of the synchronizer are ensured.

Description

technical field [0001] The invention belongs to the technical field of automobile gearboxes, and relates to a double-countershaft transmission suitable for heavy-duty automobile gearboxes, which simultaneously ensures load equalization and a synchronizer left and right concentric device. Background technique [0002] At present, two technologies are commonly used in medium and heavy-duty vehicle gearboxes, namely the ZF technology of single intermediate shaft and the EATON technology of double intermediate shafts. Each has its advantages and disadvantages in use. For example, Qijiang ZF single intermediate shaft gearbox has a good performance in passenger cars. The advantage of shifting performance is the disadvantage of poor load-carrying capacity; Fast EATON double countershaft gearbox has the advantage of strong load-carrying capacity for heavy trucks, but its disadvantage is serious synchronizer failure. [0003] The gearboxes of heavy-duty vehicles often use double inte...

AI Technical Summary

Problems solved by technology

[0003]The transmission of heavy-duty vehicles often adopts double intermediate shafts for transmission, and adopts gear radial floating mode for transmission, so as to achieve simplification in size and quality, while ensuring output power and transmission However, due to the gear floating, the left and right sides of the synchronizer are not concentric, so that the wear of the synchronizer of the heavy-duty vehicle gearbox is serious, and the replacement and maintenance are frequent, which brings great inconvenience to the user.

Images