Automobile speed variator with main-sub case sub shaft of antisymmetric arrangement

Abstract

The invention belongs to automobile transmission, in particular to an automobile transmission of which countershafts of a main box and a minor box are in asymmetric arrangement. The automobile transmission consists of the main box and the minor box, and is characterized in that a main-box countershaft is arranged in the main box; two minor-box countershafts are arranged in the minor box; and the main-box countershaft and the minor-box countershafts are in asymmetric arrangement. A gear is arranged on a shaft I on the main box; a plurality of gears, synchronizers and toothed sleeves are arranged on a shaft II of the main box; the synchronizers and the toothed sleeves arranged on the shaft II rotate together with the shaft II; a plurality of gears are arranged on the main-box countershaft; the gears on the shaft II and the gears on the countershaft are relatively engaged and rotated with each other; an input gear, a synchronizer, a main reduction gear, two minor-box countershafts and a minor-box main shaft are arranged in the minor box; and the gear in the minor box engages mutually with the gears on the two countershafts by use of the main reduction gear respectively. The automobile transmission has the characteristics of small gear shifting force, long life span and the like, reduces the driving strength of drivers, increases driving comfort, and guarantees driving safety at the same time.

Description

technical field [0001] The invention belongs to the category of automobile transmissions, in particular to an automobile transmission with asymmetric arrangement of main and auxiliary boxes and auxiliary shafts. Background technique [0002] At present, the automotive transmission products used in automobiles have a double countershaft structure or a single countershaft structure in both the main box part and the auxiliary box part, and the countershafts of the main and auxiliary boxes are arranged symmetrically. Certain defects, for the structure of all double countershafts, due to the structural characteristics, the life of the synchronizer after the two shafts float is greatly affected; for the structure of all single countershafts, there is no advantage in the overall carrying capacity, especially in Heavy-duty commercial vehicles cannot match the requirements of the whole vehicle well. Contents of the invention [0003] The object of the present invention is to addre...

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Problems solved by technology

[0002] At present, the automotive transmission products used in automobiles have a double countershaft structure or a single countershaft structure in both the main box part and the auxiliary box part, and the countershafts of the main and auxiliary boxes are arranged symmetrically. Certain defects, for the structure of all double countershafts, due to the structural characteristics, the life of the synchronizer after the two shafts float is greatly affected; for the structure of all single countershafts, there is no advantage in the overall carrying capacity, especially in Heavy-duty commercial vehicles cannot well match the requirements of the whole vehicle

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