Electric vehicle transmission

Abstract

The invention discloses an electric vehicle transmission. The electric vehicle transmission comprises a transmission shell, a driving motor rotor, a driving motor stator, a sun gear II, a driving motor output shaft and a sun gear I; a shaft extension end of the driving motor rotor is fixedly connected with the driving motor output shaft; the sun gear I sleeves the left end of the driving motor output shaft; a first planet row planet gear is mounted on a planet carrier; a wedged brake I is mounted on the inner wall of the transmission shell, and cooperates with a first planet row planet gear ring; and the sun gear II sleeves the right end of the driving motor output shaft. The electric vehicle transmission has two gears, meets the demands of vehicle acceleration, climbing and the like through reasonable matching of speed ratios, and prolongs the driving range; through integral design of a driving motor and a transmission, a control system is simplified, the number of control elements isreduced, the control difficulty is reduced, and the vehicle NVH performance and the sitting comfort are improved; and through the integral design scheme, the axial size of a power assembly is shortened, and the mounting space is saved.

Description

technical field [0001] The invention relates to the technical field of transmission, in particular to an electric vehicle transmission. Background technique [0002] In the new century, governments and automobile companies of various countries have made energy saving and emission reduction the main plan for future automobile development. Electric vehicles have the advantages of zero emission, low noise, and high efficiency. They are important products in new energy vehicles. They have a very significant effect on energy conservation and emission reduction. They are one of the important ways to solve the two global problems of energy crisis and environmental pollution. . [0003] The electric vehicle power transmission system is mainly composed of two parts: the electric drive system and the energy system. The electric drive system mainly includes drive motors, transmissions, final reducers and drive wheels, etc., and the energy system mainly includes power battery packs an...

AI Technical Summary

Problems solved by technology

[0004] Most of the existing electric vehicles in the market adopt the form of drive motor + single-stage reducer. Since there is only one gear, the drive motor is often in a low-efficiency zone, with low energy utilization efficiency, short driving range, and high requirements for the drive motor. , it is difficult to meet the needs of vehicles such as high speed, climbing and acceleration

[0005] At present, electric vehicles equipped with multi-speed transmissions mostly adopt a split design for their drive motors and transmissions, which have complex structures, many parts, and require a large installation space.

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