Electric drive axle assembly and vehicle

Abstract

The invention relates to an electric drive axle assembly and a vehicle, wherein the electric drive axle assembly comprises a motor, a shell and a planetary wheel speed reduction mechanism, hypoid gear and differential mechanism which are arranged in the shell, wherein the shell is fixedly connected with the motor; the driving shaft of the motor, the planet wheel speed reduction mechanism and theactive gear shaft of the hypoid gear are in transmission coaxially, and the passive gear of the hypoid gear is in transmission connection with the half shaft gear of the differential mechanism; an output half shaft of the differential mechanism extends out of the shell and is perpendicular to the active gear shaft. The electric drive axle assembly can improve the stability of the gear transmissionand the installation operability, and also can improve the adaptability of the shell to the speed ratios of different gears and reduce the cost.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to an electric drive axle assembly and a vehicle. Background technique [0002] The input shaft and output shaft of the traditional electric drive axle are all parallel, and all of them use cylindrical helical gears. This parallel-axle drive axle poses a challenge to the conventional rear axle. The coincidence degree of cylindrical main teeth is small, and the size required to transmit high torque is large. The number of gear teeth is less than 17, which is prone to undercutting. Therefore, the number of teeth is rarely less than 17. At the same time, the transmission stability is poor and the noise is large. [0003] In addition, there are currently two types of structures commonly used in pure electric vehicles, the parallel offset electric drive axle structure or the coaxial electric drive axle structure. Among them, the input shaft of the parallel offset axis electric drive ax...

AI Technical Summary

Problems solved by technology

The coincidence degree of the cylindrical main teeth is small, and the size required to transmit high torque is large. The number of gear teeth is less than 17, which is prone to undercutting. Therefore, the number of teeth is rarely less than 17. At the same time, the transmission stability is poor and the noise is large.

[0003] In addition, there are currently two types of structures commonly used in pure electric vehicles, the parallel offset electric drive axle structure or the coaxial electric drive axle structure. Among them, the input shaft of the parallel offset axis electric drive axle is parallel to the output shaft, and the There is a distance, the motor is decelerated by two-stage cylindrical helical gears, and the torque is transmitted through the side gears in the differential, but the shell of this structure is basically divided into two parts, and the two parts need to be combined during installation. At the same time, at this time, the parallelism guarantee ability of each axis is relatively high, and the operation is more complicated; the motor shaft of the coaxial electric drive axle is coaxial with the output shaft, and the motor is decelerated by two-stage cylindrical helical planetary gears. The half-shaft gear transmits the torque, but this structure takes up a lot of space along the left and right directions of the vehicle, resulting in a shorter length of the constant velocity transmission shaft and higher requirements for the swing angle of the universal joint, especially for those with higher requirements for the swing angle of the universal joint Front-drive electric vehicles may be more difficult to match

[0004] Moreover, whether it is a parallel off-axis electric drive axle structure or a coaxial electric drive axle structure, if the speed ratio of the gear needs to be changed, the adaptability of the shell is poor, and the shell needs to be recast, which is costly

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