Electric vehicle automatic transmission

Abstract

The invention discloses an automatic transmission for an electromobile. The automatic transmission comprises a transmission box, a driving gear, a large transmission gears, a small transmission gear,an overrunning clutch gear set, a differential mechanism gear, a screw rod, a push-and-pull shaft, a power motor, a gear shifting motor, an intelligent controller and a speed adjustment rotary handle.Under the state that the rotating speeds of left saw-shaped teeth and right saw-shaped teeth of the overrunning clutch gear set are greater than the rotating speeds of left clutch saw-shaped teeth and right clutch saw-shaped teeth, rapid engagement is achieved, and the tooth snapping, beating and jerking phenomena do not exist; and when the rotating speeds of the left saw-shaped teeth and the right saw-shaped teeth are smaller than the rotating speeds of the left clutch saw-shaped teeth and right clutch saw-shaped teeth, slipping and separation are caused. By means of magnetic elastic force,the clutch saw-shaped teeth are small in friction and low in noise, and the rotating speed synchronization requirement for the gear set is not high. Simple pulse speed adjustment control is adopted; the gear shifting time is short; the power motor is controlled by a gear shifting control circuit to be powered on and off within a set period of time; and impact-free synchronous engagement between alarge gear shifting gear and an overrunning clutch gear as well as between a small large gear shifting gear and the overrunning clutch gear is achieved. The gear shifting motor is automatically controlled by the intelligent controller to perform high-speed and low-speed gear shifting according to the load and rotating speed of the power motor; and the low-speed gear is adopted at the moment of starting, the high-speed gear is adopted during normal service, and the low-speed gear is adopted in the upslope process. By means of the automatic transmission, mechanism damage caused by misoperation of manual gear shifting is effectively avoided.

Description

technical field [0001] The invention relates to a differential motor of an electric tricycle, to be precise, an automatic transmission of an electric vehicle. Background technique [0002] At present, with the change of market demand, the differential motor of the electric tricycle has experienced the process of continuous progress and development from the initial constant gear to manual shift, and from manual shift to automatic shift. The core lies in the automatic transmission There is an invention patent with the application number "2015104435079" and the name is "automatic shifting motor", which can automatically shift between high and low gears according to the change of motor speed and load, and solve the mechanism damage caused by improper manual shifting operation. , is an ideal shifting method, but its automatic transmission has the disadvantages of complex structure and high cost. Contents of the invention [0003] In order to overcome the deficiencies of the ex...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies of the existing automatic shifting motors, the present invention introduces an automatic transmission for electric vehicles, which can not only automatically shift between high and low gears, and solve the mechanism damage caused by improper manual shifting operations, but also has a simple structure, low cost, and high reliability. high

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