Follow-up type selecting gear shifting hydraulic actuator of vehicle automatic mechanical speed variator

Abstract

The invention discloses a follow-up gear selection and shift hydraulic actuator of an automobile mechanical automatic transmission. The actuator is composed of two intermittent follow-up hydraulic cylinders and a rack and pinion mechanism with the same working principle to realize the gear selection and shift operation process. , so as to realize the automatic selection and shifting of the automobile mechanical transmission through the control of the solenoid valve of the hydraulic cylinder. The gear shift cylinder and the gear selection cylinder are placed vertically, and the left bracket and the right bracket are placed horizontally; after one end of the shift fork is connected with the gear, it is set on the right piston of the gear selection cylinder; the rack is installed on the left bracket and the right bracket. In the round hole at one end, and the rack meshes with the gear, the end of one end of the rack is installed on one end of the connecting rod, the other end of the connecting rod is installed on the right piston of the shift cylinder, and the other end of the L-shaped left bracket is installed on the On the left flange, the L-shaped other end of the right bracket is installed on the right flange; one end of the connector is connected to the housing of the shift cylinder, and the other end of the connector is connected to the right flange of the gear selection cylinder Above; in the present invention, the structure of the shift cylinder and the selection cylinder are the same, and the structures of the left bracket and the right bracket are the same, and they are "L" structures.

Description

technical field [0001] The invention relates to a gear selection and shift actuator of an automobile mechanical automatic transmission, to be precise, a follow-up gear selection hydraulic actuator for an automobile mechanical automatic transmission that can realize multiple vehicle models and various gear positions . Background technique [0002] At present, the gear selection and shifting actuators of automobile mechanical automatic transmissions generally adopt the electronically controlled hydraulic method, which has the advantages of fast control response and high precision. At present, for the common 6-speed transmission, the process of gear selection and gear shifting is generally achieved by using a standard hydraulic cylinder for cross arrangement and controlling three positions respectively. In order to achieve the required three positions in the shifting process, a baffle plate is generally used to limit the moving piston of the hydraulic cylinder. Once the piston...

AI Technical Summary

Problems solved by technology

In order to achieve the required three positions in the shifting process, a baffle plate is generally used to limit the moving piston of the hydraulic cylinder. Once the piston stroke is fixed, it is difficult to adjust again, and when the piston moves to the limit, it is easy to produce Greater impact and vibration, and greater noise, if controlled by software, will increase the complexity of the software and reduce the real-time performance of the system

For transmissions with other gear numbers, the actuators suitable for 6-speed transmissions are no longer applicable and need to be redesigned. The current design structure reduces the applicability of vehicle matching and is not conducive to the market promotion of automotive mechanical automatic transmissions

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