Mechanical automatic transmission gear selecting and shifting executing mechanism

Abstract

The invention discloses a mechanical automatic transmission gear selecting and shifting executing mechanism. The mechanical automatic transmission gear selecting and shifting executing mechanism comprises a shell, a gear selecting module and a gear shifting module. A main shaft is arranged in the shell and provided with a gear selecting and shifting finger. The gear selecting module comprises a gear selecting motor, a speed reduction mechanism, a cam, a gear selecting shaft and a gear selecting auxiliary shaft. An output shaft of the gear selecting motor is connected with the speed reduction mechanism in the cam. The gear selecting shaft is arranged on the gear selecting auxiliary shaft. One end of the gear selecting shaft is connected with a ball, the ball is placed in a groove in the cam, and the other end of the gear selecting shaft is connected with the gear selecting and shifting finger. The gear shifting module comprises a gear shifting motor, a ball screw, a nut and a gear shifting block. One end of the ball screw is connected with an output shaft of the gear shifting motor, the other end of the ball screw is connected with the nut, and the nut is in clearance fit with the gear shifting block. According to the mechanical automatic transmission gear selecting and shifting executing mechanism, accurate and rapid gear selecting is achieved through the gear selecting shaft and a special groove structure in the cam; and through the combination of the ball screw, the nut and the gear shifting block, rapid and effective gear shifting is achieved, and the gear selecting and shifting quality is improved.

Description

technical field [0001] The invention relates to the technical field of automobile transmission, in particular to a gear selection and shifting actuator of a mechanical automatic transmission. Background technique [0002] Energy shortages, environmental pollution, and climate warming have become the focus of the world and need to be solved urgently, and they are also huge challenges faced by the automobile industry and the energy industry; as a major contributor to oil consumption and carbon dioxide emissions, automobiles need revolutionary changes , Vigorously develop new energy vehicles and realize transportation energy transformation is an important way to achieve sustainable development of transportation. [0003] As the core component of new energy vehicles, the electromechanical coupling drive system is a powertrain that highly integrates a permanent magnet synchronous motor and an automatic mechanical transmission (AMT). Compared with the direct-drive power system ap...

AI Technical Summary

Problems solved by technology

[0005] Existing actuators include electronically controlled hydraulic actuators. The power of the electronically controlled hydraulic actuators comes from the hydraulic system, which has a complex structure and is difficult to arrange, install, and maintain; oil supply pressure fluctuations and hydraulic oil viscosity changes with temperature will be affected , can not achieve accurate and fast control effect; hydraulic components require high machining accuracy, which increases the cost of the entire mechanism

The electro-pneumatic actuator uses air as the power source, and requires air pipelines to transmit power. The structure is complex, and the gas is easy to leak, poor sealing, high noise, and high air compressibility, which affects the response speed and unstable shift time. low shift quality

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