Power transmission device and electric vehicle with same

Abstract

The invention discloses a power transmission device and an electric vehicle with the device, wherein the power transmission device comprises a first electric motor which comprises a hollow rotor shaft and a second electric motor which comprises a rotor shaft capable of going through and extending out of the hollow rotor shaft of the first electric motor. As the rotor shafts are nested and do not interfere with each other, direct mechanical connection does not exist between a first power transmission chain and a second power transmission chain, which can move independently, and the independent driving device has compact structure. The electric vehicle comprises the power transmission device, wherein a transmission shaft is connected with output ends of a first retarding mechanism and a second retarding mechanism respectively, and wheels are respectively connected with the transmission shafts. Owning to the compactness of the power transmission device, when the device is arranged at the vehicle, the non-suspended mass is little, thus improving the ground force of the vehicle and further improving the vehicle safety. On this basis, if the power transmission device is used to drive a steering wheel, the vehicle steering is more flexible and effortless as the device does not need to be arranged on the edges of the wheels.

Description

technical field [0001] The invention relates to a power transmission device capable of realizing wheel independent drive and an electric vehicle with the device. Background technique [0002] In recent years, environmentally friendly electric vehicles such as pure electric vehicles and hybrid vehicles equipped with electric motors as a power source have gradually been put into practical use. Compared with internal combustion engines, electric motors have the advantages of high response accuracy, fast response speed, compact size, and flexible layout, which can better meet the requirements of vehicle power, economy, and dynamic characteristics. [0003] Wherein, adopting the electric motor arranged on the side of the wheel or in the wheel can form a two-wheel or four-wheel independently driven electric vehicle. Such vehicles have good dynamics due to the precise and fast control of the drive torque at each wheel. [0004] However, in the prior art, in order to realize the i...

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, in order to realize the independent driving of the wheels, the motors are mostly installed on the side of the wheels or in the wheels, so that the driving structure of the car is not compact, and the motor has a relatively large mass, which increases the unsuspended mass and reduces the grounding force of the wheels. , which adversely affects the safety of the vehicle

If such a motor is installed on the steering wheel, it will be very unfavorable to the steering of the vehicle and will also have an adverse effect on the performance of the vehicle

Images