Rear axle power transmission structure of rear-drive electric vehicle

Abstract

The invention discloses a rear axle power transmission structure of a rear-drive type electric vehicle, which comprises a horizontally arranged cylindrical rear axle housing, a power mechanism is arranged in the middle of the rear axle housing, and the power mechanism includes a The differential, also includes the electric motor fixed on the differential, the output shaft of the motor is connected with the differential, and the output shaft of the differential is connected with the wheels through the transmission shaft located inside the rear axle housing; it also includes the front end and the vehicle body The trailing arm is connected to the main body of the frame at the chassis position and the rear end is connected to the rear axle housing; it is characterized in that the front end of the trailing arm is inclined forward and upward, and the rear end is connected and fixed by two connection points and the rear axle housing . The invention has the advantages of simple structure, can improve the performance of power transmission from the rear axle to the vehicle frame, and at the same time improve the installation stability of the trailing arm and the like.

Description

technical field [0001] The invention relates to a rear-drive electric vehicle, in particular to a rear-axle power transmission structure of the rear-drive electric vehicle. Background technique [0002] An electric vehicle is a vehicle that uses a battery as an energy source, and converts electrical energy into mechanical energy through controllers, motors and other components to control the current and change the speed. The first electric car was produced in 1834 and it was driven by a DC motor. Today, electric vehicles have changed dramatically and come in many varieties. Among them, an electric vehicle (EV) refers to a vehicle powered by an on-board power supply, driven by a motor to drive the wheels, and conforms to the requirements of road traffic and safety regulations. Due to its smaller impact on the environment than traditional cars, its prospects are widely optimistic, but the current technology is still immature. [0003] In terms of electric vehicles, the "Dev...

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Problems solved by technology

[0005] Existing electric vehicles generally imitate the structure research and development of ordinary cars during research and development. For example, a kind of rear axle assembly disclosed by CN201410249550 belongs to this technology, and there are the following defects: 1. In the shock absorber, the shock absorber spring and The damper directly adopts the structure of the shock absorbing and damping device in the car, that is, the two are integrated together, but the existing shock absorbing and damping devices are all developed and designed for ordinary cars, and the matching degree of the shock absorbing performance and the damping performance is the same as Ordinary cars are suitable, and the weight of electric cars is much lower than that of ordinary cars, so the existing shock absorption and damping devices cannot adjust the shock absorption and damping performance separately. If the performance of the two does not match, the performance will affect each other. Integrated shock absorbers are not suitable for use in electric vehicles

2. The trailing arm is fixedly connected to the rear axle shell by welding or fastening with two bolts arranged in the same line, which has poor shock absorption effect and is inconvenient to install

3. The rear part of the car shell is an integral cover structure imitating the rear shell of an ordinary car, which is inconvenient for the installation and maintenance of the motor and the rear axle structure

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