Underpan system of distributed pure electric vehicle

Abstract

The invention discloses an underpan system of a distributed pure electric vehicle. The underpan system comprises a vehicle wheel independent driving system, a vehicle wheel independent steering system, a motor mounting bracket, a steering motor, a steering gear mechanical interface, an axle shaft, vehicle wheels, a suspension system and a braking system. The steering gear mechanical interface is connected with the output end of a vehicle built-in steering motor assembly, one end of a suspension is connected with the vehicle wheels, and the other end of the suspension is connected with a vehicle frame; and a driving motor is fixed to the vehicle frame, and the vehicle wheels are driven to rotate by the axle shaft. According to the underpan system of the distributed pure electric vehicle, the underpan design of the pure electric vehicle where all the vehicle wheels are independently driven to steer independently is achieved, further all driving functions of an ordinary vehicle can be achieved, meanwhile interfaces and elements which are commonly used in an existing vehicle suspension system are reserved as much as possible, and good transportability is achieved.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to a chassis system of a distributed pure electric vehicle. Background technique [0002] Due to the centralized power drive and hard mechanical transmission steering mechanism of traditional ground vehicles, the wheels are subject to more shafting and connecting rod constraints, and it is impossible to make the four wheels steer without interfering with each other; most of the existing electric vehicles still use centralized Power arrangement, that is, only one electric motor drives two or four wheels. With the advancement of motor technology, electric vehicles already have the conditions for independent drive of four wheels. The advantage of using independent drive is that it can cancel the traditional axles and connecting rods that limit the steering of the wheels, which makes the electric vehicle have the conditions for the four wheels to turn independently. [0003] Although ...

AI Technical Summary

Problems solved by technology

[0003] Although the existing vehicle steering system has developed from a simple purely mechanical steering system, hydraulic power steering system, and electro-hydraulic power steering system to an electric power steering system with more energy-saving and superior handling performance, the steering force of the vehicle has been improved. The control characteristics reduce the driver's steering burden, but limited by the mechanical transmission mode, the steering transmission ratio is fixed, and the steering characteristics are poor

In recent years, some car companies have adopted the electronic steering by wire system (Steering By Wire System), which connects the steering wheel and the steering wheel through control signals, which improves the angular transmission characteristics of the car's steering, but still uses the traditional unified steering of all wheels The centralized mode of the system, including front-wheel steering (2WS) or four-wheel steering (4WS), which wastes the advantages of the fly-by-wire steering system, especially does not bring convenience and new experience to the user

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