Electric vehicles and - integrated powertrain thereof

Abstract

The invention relates to an electric vehicle and an integrated powertrain thereof, wherein an end of an output shaft of a motor away from an output bearing is not mounted on an inner wall of a motor cavity through a bearing, so that the number of bearings can be reduced compared with the powertrain in the prior art, thereby simplifying a structure and reducing a cost. In addition, one end of the motor output shaft extends into the reducer chamber and is splined with the reducer input shaft. In one aspect, since the second input bearing is proximate to the motor output shaft, the second input bearing may provide support to the motor output shaft while supporting the reducer input shaft. On the other hand, since the motor output shaft and the reducer input shaft are splined to transmit torque, and the splined connection has a strong radial limiting effect, the motor output shaft and the reducer input shaft can also support each other. Therefore, the reliability of the transmission process will not be affected. It can be seen that the electric vehicle and the integrated powertrain thereof not only reduce the cost, but also take into account the higher reliability.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to an electric vehicle and its integrated power assembly. Background technique [0002] In the traditional vehicle drive system, the motor, reducer, and controller all exist in the form of a separate box, so it is difficult to meet the current demand for compact and lightweight electric vehicles. Therefore, the integrated powertrain will be the development trend of electric vehicle drive system. Integrated powertrain refers to the integration of drive motor and reducer (or controller) into one housing. Wherein, the two ends of the output shaft of the drive motor are respectively provided with bearings, and the two ends of the input shaft of the reducer are also respectively provided with bearings. [0003] Since oil is not allowed to exist in the driving motor, the working environment in the driving motor has high requirements on the performance of the bearings, result...

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide an integrated powertrain and electric vehicle with lower cost and higher reliability in view of the problem that the existing integrated powertrain cannot take into account both cost and reliability.

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