Automatic transmission and gear selection and shift actuating mechanism thereof

Abstract

The invention discloses an automatic transmission and a gear selection and shift actuating mechanism of the automatic transmission. The gear selection and shift actuating mechanism comprises a gear shift chamber, a gear selection mechanism and a gear shift mechanism, wherein a gear selection driving block, a gear shift driving block and a gear shift finger are arranged in the gear shift chamber, the gear selection mechanism drives the gear selection driving block to drive the gear shift finger to move left and right to select a gear, and the gear shift mechanism drives the gear shift driving block to drive the gear shift finger to move up and down to select a gear. A gear selection motor is used as a power source of the gear selection mechanism, and a pneumatic device or a linear motor is used as a power source of the gear shift mechanism. Thus, when the pneumatic device is used as the power source of the gear shift mechanism, the response speed is high, and gear shift can be performed fast. When the linear motor is used as the power source of the gear shift mechanism, the gear shift finger can be directly driven to make linear motion. An additional mechanical device for converting rotating motion of a motor rotor into linear motion can be cancelled, the mechanical structure is simplified, and the response speed is increased. Moreover, because the gear selection motor is used as the power source of the gear selection mechanism, speed regulation can be controlled, and the gear selection time can be controlled.

Description

technical field [0001] The invention relates to the technical field of transmissions, in particular to an automatic transmission and a gear selection and shifting actuator thereof. Background technique [0002] Automatic mechanical transmission (AMT, Automated Mechanical Transmission) is improved on the basis of traditional manual gear transmission. It is an electromechanical-hydraulic integrated automatic transmission that combines the advantages of both automatic and manual. [0003] In order to improve the performance of AMT vehicles, it is an important aspect to improve its shift control. At present, according to the different power sources of the actuators, the shift actuators of AMT can be divided into three types: electro-pneumatic, electro-hydraulic and electro-electric. [0004] The gear selection and shift actuator includes a gear shift chamber, a gear selection mechanism and a gear shift mechanism; wherein, the gear selection mechanism drives the gear selector bl...

AI Technical Summary

Problems solved by technology

Therefore, the mechanical structure of the gear selection actuator is complicated, which not only reduces the reliability, but also slows down the response speed of the actuator, degrades the sensitivity, and lowers the controllability; in addition, the increase of the mechanical structure also makes the entire The volume of the actuator increases, which brings difficulties to its layout

[0006] For the electro-pneumatic gear selection and shifting actuator, the power source of the gear selection mechanism and the gear shifting mechanism are both pneumatic devices. For the gear selection mechanism, since the pneumatic device can only achieve a fixed gear selection time, it cannot The gear selection time is controlled, and for the mechanism with many gear selection positions, the pneumatic device as the gear selection power source is complex in structure and large in size, so it is not suitable to arrange

Images