Pneumatic shifting device

Abstract

The pneumatic gear shifting apparatus includes one casing with one executing mechanism; and one driving cylinder beside the casing and comprising one cover plate, one large cylinder body, one connecting seat, one small cylinder body, one support cover and one cylinder cover. The large cylinder body and the connecting seat enclose one large cavity with one large piston ring inside it; and the connecting seat, the small cylinder body and the support cover enclose one small cavity with one small piston ring inside it. The present invention has the advantages of simple structure and accurate gear shifting.

Description

technical field [0001] The invention relates to the field of automobile manufacturing, in particular to a pneumatic shifting device. Background technique [0002] At present, most of the transmission shifting actuators in the field of automobile manufacturing are mechanical manual shifting. Its typical structure is to realize the synchronizer shifting through the manual lever driving the connecting rod and the shift fork. The main disadvantages are frequent operation and high labor intensity. The typical structure of the hydraulic transmission automatic shift transmission (AT) shift actuator used in some high-end passenger cars is to realize the gear shift by controlling the complex hydraulic system and hydraulic friction clutch through the electronic valve. High consumption, poor maintainability and assembly. [0003] The utility model patent with the patent number ZL200520066894.0 discloses a pneumatic shift device for an automobile transmission. The air increases the pr...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the transmission shifting actuators in the field of automobile manufacturing are mechanical manual shifting. Its typical structure is to realize the synchronizer shifting through the manual lever to drive the connecting rod and the shift fork. The main disadvantages are frequent manipulation and high labor intensity.

The typical structure of the hydraulic transmission automatic shift transmission (AT) shift actuator used in some high-end passenger cars is to realize the gear shift by controlling the complex hydraulic system and hydraulic friction clutch through the electronic valve. High consumption, poor maintainability and assembly

[0003] The utility model patent with the patent number ZL200520066894.0 discloses a pneumatic shift device for an automobile transmission. The air increases the pressure of the left cavity or the right cavity, and pushes the piston ring to move axially to the right or left in the sealed cavity, thereby driving the shift fork shaft to move accordingly to realize the automatic shifting of the transmission. The neutral position of the transmission is automatically pushed back by the gear selection balance springs respectively provided in the left cavity and the right cavity. The main defect is that after the compressed air supply of the gear position control cylinder is terminated, the gear selection The balance spring automatically pushes back, and the car is prone to gear loss during vibration and movement

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