Transmission for electrically driven vehicle

Abstract

The invention relates to a transmission for an electrically-driven vehicle, which belongs to the technical field of automobiles and comprises an input shaft and an output shaft, one end of the input shaft is fixedly connected with a driving motor, and the input shaft and the output shaft are in power connection through a first speed regulating mechanism and a second speed regulating mechanism which are selectively jointed. The output shaft is in power connection with a wheel axle through a differential mechanism, the first speed regulating mechanism and the second speed regulating mechanism correspond to a low-speed gear and a medium-high-speed gear respectively, the first speed regulating mechanism is connected with a first clutch for controlling the first speed regulating mechanism to be in power connection, and the second speed regulating mechanism is connected with a second clutch for controlling the second speed regulating mechanism to be in power connection. Two-gear speed regulation of the electrically-driven vehicle can be achieved, the dynamic property and the climbing performance of the whole vehicle at the low speed can be improved, the driving motor can more run in a high-efficiency area with the medium-low rotating speed at the medium-high speed, meanwhile, the structure is simple, and the mechanical efficiency and the system cost can be well guaranteed.

Description

technical field [0001] The invention relates to a transmission for an electric drive vehicle, which belongs to the technical field of automobiles. Background technique [0002] A typical electric drive vehicle transmission system consists of a constant speed ratio reduction gear. The motor power is directly transmitted to the wheels through the reduction gear. The motor power cannot be adjusted through the reducer to adjust the torque and speed to adapt to the vehicle. In order to meet the low speed and high torque of the whole vehicle Demand and high-speed driving demand, most of the current electric drive vehicles meet the needs of the whole vehicle by increasing the torque and speed of the motor. Although the current electric drive system can basically meet the needs of the whole vehicle, the system has relatively large limitations. For example, compared with traditional vehicles, its power and maximum speed are significantly lower, and the pure electric power consumption...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a transmission for electric drive vehicles, which solves the problems in the prior art that the structure of the existing two-speed transmission is complicated, and the mechanical efficiency and system cost cannot be well guaranteed.

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