Pneumatic gear shifting control system assembly for auxiliary box of multi-gear transmission

Abstract

The invention discloses a pneumatic gear shifting control system assembly for an auxiliary box of a multi-gear transmission, and belongs to the technical field of automobile transmissions. The problem that at present, when main and auxiliary box interlocking and post-gear-shifting neutral prevention are achieved through a high and low gear pneumatic gear shifting system of an auxiliary box of a domestic double-intermediate-shaft multi-gear transmission by means of a mechanical structure, because a certain period of time is needed in the pneumatic gear shifting gas pressure establishing and pneumatic driving process, the mechanical structure and a pneumatic element frequently impact on each other during use and wear is caused is solved. According to the pneumatic gear shifting control system assembly, a gas inlet of a reversing valve is connected with a gas source filter pressure reducing valve all the time, it is ensured that gas exits in a high-gear gas outlet or a low-gear gas outlet of the reversing valve all the time, and therefore gas exists on the high-gear and/or low-gear side of a gear shifting cylinder all the time and the aim of post-gear-shifting neutral prevention is achieved. In addition, a check valve in the pneumatic gear shifting control system assembly is arranged between a gas source and a gear shifting switch, the check valve is controlled to be opened and closed through a check valve electric shock thumbing head which is connected with a main box gear shifting mechanism, the check valve cannot be opened until a main box is at the neutral gear, and interlocking of the main box and the auxiliary box is achieved.

Description

technical field [0001] The invention belongs to the technical field of automobile transmissions. Background technique [0002] At present, the high and low gears of the auxiliary box of the double countershaft multi-speed transmission generally adopt pneumatic shifting. The pneumatic shifting system relies on the mechanical structure to realize the interlocking of the main and auxiliary boxes and the prevention of gear loss after shifting. Due to the establishment of the pneumatic shifting air pressure and the pneumatic process It takes a certain amount of time, and in actual use, the mechanical structure and the pneumatic components often collide with each other and wear out. Contents of the invention [0003] In order to solve the above-mentioned problems, the present invention provides a multi-speed transmission auxiliary case pneumatic shift control system assembly to effectively realize the interlocking control of the main and auxiliary cases and simultaneously preven...

AI Technical Summary

Problems solved by technology

[0002] At present, the high and low gears of the auxiliary box of the double countershaft multi-speed transmission generally adopt pneumatic shifting. The pneumatic shifting system relies on the mechanical structure to realize the interlocking of the main and auxiliary boxes and the prevention of gear loss after shifting. Due to the establishment of the pneumatic shifting air pressure and the pneumatic process It takes a certain amount of time, and in actual use, the mechanical structure and the pneumatic components often collide with each other and wear out

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