Electric vehicles and their integrated powertrain

Abstract

The invention relates to an electric vehicle and an integrated powertrain thereof, wherein an end of a reducer input shaft remote from an input bearing is not mounted on an inner wall of a reducer chamber through a bearing, so that the number of bearings can be reduced relative to the powertrain in the prior art, thereby simplifying a structure and reducing a cost. In addition, one end of the reducer input shaft extends into the motor cavity and is splined with the motor output shaft. In one aspect, since the second output bearing is proximate to the reducer input shaft, the second output bearing may provide support to the reducer input shaft while supporting the motor output 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, reliability of the transmission process is not affected. Accordingly, the electric vehicle and its integrated powertrain 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] At present, when designing an integrated powertrain, methods such as reducing the number of bearings to simplify the system structure are often used to achieve the p...

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.

Images