A power system assembly of a two-speed electric vehicle

Abstract

The invention provides a power system assembly for two-speed electric vehicles. The power system assembly for two-speed electric vehicles comprises an electromotor, a single-row planetary gear train, a synchronizer, a single reduction final drive, a compensating gear, a magnet brake and a housing, wherein the stator of the electromotor is fixed inside the housing; a rotor is connected with one side of a rotor shaft; the other side of the rotor shaft is arranged inside the housing in a penetrating manner through a bearing; the single-row planetary gear train comprises a central gear, a planet carrier and more than two planetary gears; the single reduction final drive comprises a small main reducing gear and a big main reducing gear which are meshed with each other; the synchronizer comprises a first gear synchronous lock ring, a second gear synchronous lock ring, a meshing sleeve and a meshing sleeve seat. According to the invention, the technology of integrated structural design is adopted, so that the highly integrated design and the application of the motor, the transmission and the compensating gear is realized; the integration of the electrically-driven system becomes more obvious; the volume and the weight of the electrically-driven system are effectively reduced; the mounting is enabled to be more convenient; the two-gear speed change is adopted, so that the efficiency and the torque of the electromotor are improved.

Description

technical field [0001] The invention belongs to the electric drive technical field of electric vehicles, and in particular relates to a power system assembly of a two-speed electric vehicle. Background technique [0002] In recent years, my country's electric vehicles have made great progress. At present, in order to meet the loading requirements of the motor in the electric vehicles on the market, most manufacturers assemble the motor and the transmission on the body in the form of two independent parts. It is realized by matching the splines in the input shaft. But this will not only increase the mechanical noise and vibration, but also the motor front cover and the transmission housing are independent structures, which will inevitably affect the layout of the vehicle space. Moreover, most of the electric vehicles currently on the market use a fixed speed ratio reducer, which will make the traction motor not only provide a higher instantaneous torque in the constant torq...

AI Technical Summary

Problems solved by technology

But this will not only increase the mechanical noise and vibration, but also the front cover of the motor and the transmission housing are independent structures, which will inevitably affect the layout of the vehicle space

Moreover, most of the electric vehicles on the market currently use a fixed speed ratio reducer, which will make the traction motor not only provide a higher instantaneous torque in the constant torque area, but also provide a higher operating speed in the constant power area. speed

At the same time, there is the problem of low working efficiency of the motor

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