Multi-motor electric vehicle driving axle structure

Abstract

The invention discloses a drive axle structure of a multi-motor electric vehicle, which belongs to the technical field of vehicles. The structure includes a differential. The output shafts of more than two motors are directly or indirectly engaged to output power to the input wheels on the differential. Two half shafts are connected to the output on both sides of the differential. There is a universal joint between them. The invention realizes the maximization of the motor efficiency and provides a way to effectively reduce the cost of the motor.

Description

technical field [0001] The invention relates to a driving axle structure of an electric vehicle, in particular to a driving axle structure of a multi-motor electric vehicle, and belongs to the technical field of vehicles. Background technique [0002] As a kind of environmental protection transportation, electric vehicles have developed rapidly in recent years. The current electric electric vehicles mainly include electric bicycles, electric tricycles, and electric vehicles (four wheels). As drive axles, they are only used on electric vehicles with more than three wheels. At present, on electric tricycles, the basic motor outputs power to the differential to drive the rear wheels to rotate forward. The rear wheels of electric tricycles do not have the configuration and structure required for steering, so they cannot be applied to the drive of electric vehicles as a substitute for fuel vehicles. The development of electric vehicles is very fast. At present, electric cars are ...

AI Technical Summary

Problems solved by technology

[0002] As a kind of environmental protection transportation, electric vehicles have developed rapidly in recent years. The current electric electric vehicles mainly include electric bicycles, electric tricycles, and electric vehicles (four wheels). As drive axles, they are only used on electric vehicles with more than three wheels. At present, on electric tricycles, the basic motor outputs power to the differential to drive the rear wheels to rotate forward. The rear wheels of electric tricycles do not have the configuration and structure required for steering, so they cannot be applied to the drive of electric vehicles as a substitute for fuel vehicles. The development of electric vehicles is very fast. At present, electric cars are generally driven by a motor. The power of the motor is output to the differential, and the differential drives the wheels through the half shaft. Due to the need for steering

A universal joint that cooperates with the steering is assembled between the half shaft and the wheel. In current electric vehicles, a motor is generally used to drive, which has the following defects: First, if the motor breaks down, the vehicle will not be able to drive; The drive axle with one motor is more complicated in the weight distribution of the drive axle and the adjustment of the center of gravity point, which is not conducive to the control of the overall center of gravity of the vehicle; third, because the electric car requires different power in various situations during driving, the single motor is in the case of Each different power point has a motor to provide power, so that the power of the working point is poorly matched with the rated power of the motor and its inherent characteristics, and it is difficult to optimize the high-efficiency conversion of electric energy. Fourth, because the power and volume of the motor are generally positively correlated, Therefore, a single motor with a certain power needs to arrange a large installation space in the design, which is not conducive to the optimization of the overall installation design of electric vehicles, and each motor in the combination of two or more motors that can provide the same power may have a smaller volume , more flexible design and matching installation manufacturing space

Images