Electric vehicle chassis assembly with four-wheel wheel motor drive and four-wheel independent steering

Abstract

The invention discloses an electric car chassis assembly capable of achieving four-wheel wheel-side-motor drive and four-wheel independent turning. The electric car chassis assembly comprises a frame, turning motors, turning support arms, turning racks, drive motors, turning standing columns, spring damper assemblies and guide mechanisms, wherein the turning motors are fixed on the frame, the turning support arms can rotate around the output shafts of the turning motors, the turning racks can rotate along with the turning support arms, hubs are rotatably connected to the turning standing columns, the spring damper assemblies are arranged between the turning support arms and the turning standing columns and used for supporting and damping the turning support arms, and the guide mechanisms are used for guiding the movements of the spring damper assemblies. The electric car chassis assembly has the advantages that the wheel-side motors are used to drive an electric car to turn, the wheel-side motors are designed into sprung mass, the running smoothness and power performance of the electric car are increased, and the drive torque among different wheels can be reasonably distributed due to the fact that the wheel-side motors are used to control the drive torque of the drive four wheels.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to a chassis modular structure assembly of a four-wheel independently steering electric vehicle driven by a four-wheel wheel-side motor and a four-wheel torque control method for an electric vehicle with a four-wheel wheel-side motor. Background technique [0002] With the deepening of the design concept of electric vehicles and the continuous progress of the electric drive system, engineers hope that the design of electric vehicles will gradually get rid of the thinking constraints of traditional internal combustion engine vehicle design, so there is an electric vehicle that independently drives four wheels with four motors The chassis structure is a four-wheel independent electric drive chassis. Judging from the research status at home and abroad, four-wheel independent drive electric vehicles are mainly driven by hub motors. Since the hub motor is installed inside the wheel, the...

AI Technical Summary

Problems solved by technology

Since the hub motor is installed inside the wheel, the unsprung mass of the car is increased, which makes the ride comfort and handling of the vehicle worse. In addition, the power and torque of the hub motor are generally smaller than that of the wheel motor, and the car's power is not as good as that of the wheel motor. , and the use of wheel side motor drive, if not properly designed, will also increase the unsprung mass, and at the same time it is difficult to realize four-wheel independent drive and four-wheel independent steering at the same time from the structure

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