Electromagnetic valve controlled pneumatic shift automatic speed variator

Abstract

The invention discloses an automatic speed changer in which an electromagnetic valve controls pneumatic gear shifting. The automatic speed changer comprises a speed changing transmission mechanism, an electromagnetic valve control device, a clutch driving mechanism, an air source, a gear shifting execution mechanism and a gear shifting driving air cylinder used to drive the gear shifting execution mechanism, wherein the clutch driving mechanism and the gear shifting execution mechanism are connected with the speed changing transmission mechanism respectively, air inlets of the clutch driving mechanism and the gear shifting driving air cylinder are connected with the air source by the electromagnetic valve control device respectively, and all air inlets of the gear shifting driving air cylinder are provided with throttle governing valves. The automatic speed changer has the advantages of adoption of the electromagnetic valve to control the pneumatic gear shifting and the pneumatic clutch, accurate and smooth gear shifting and simple structure.

Description

technical field [0001] The invention relates to the field of automobile manufacturing, in particular to an automatic transmission for pneumatically shifting gears controlled by a solenoid valve. Background technique [0002] At present, most of the transmissions in the automobile manufacturing field are mechanical manual gear shifting. The typical structure is to realize the synchronizer gear 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...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the transmissions in the field of automobile manufacturing are mechanical manual shifting. The 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 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

[0004] The utility model patent with the patent number ZL200620051144.0 discloses a mechanical automatic transmission, which uses a motor to drive the actuator to perform gear selection and clutch engagement and separation. rattle

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