An electric vehicle four-wheel independent steering chassis system and its steer-by-wire mechanism
A four-wheel independent steering, electric vehicle technology, applied in the direction of electric steering mechanism, power steering mechanism, steering mechanism, etc., can solve the problems of poor steering stability, short service life of transmission structure, unfavorable vehicle safe operation, etc. Poor, smaller size, better wheel steering stability
Active Publication Date: 2016-06-08
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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Problems solved by technology
[0005] Therefore, the technical problem to be solved by the present invention is that the steering stability of the steering-by-wire device of the existing electric vehicle four-wheel independent steering chassis system is poor, the service life of the transmission structure is short, and it is not conducive to the safe operation of the vehicle. Four-wheel independent steering chassis system and its steer-by-wire mechanism for electric vehicles with good steering stability, safety and reliability, and good maneuverability in a small space
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[0037] Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.
[0038] Such as figure 1 Shown is a preferred embodiment of the electric vehicle four-wheel independent steering chassis system and its steering-by-wire mechanism of the present invention. The four-wheel independent steering chassis system of the electric vehicle includes a wire-controlled steering mechanism and a suspension wheel assembly.
[0039] Such as figure 2 and 3 As shown, in this embodiment, the suspension wheel assembly adopts a double-wishbone independent suspension, including an upper cross-arm 12, a lower cross-arm 6, a shock absorber 13 and a steering knuckle 11, and the upper cross-arm 12 and The lower cross arm 6 is installed and fixed with the vehicle body, the shock absorber 13 ...
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An electric automobile chassis system with four-wheel independent steering and a steering-by-wire mechanism thereof. The steering-by-wire mechanism comprises two steering pull rods (7), a steering power unit and two transmission units. The steering pull rods (7) are arranged horizontally, the end of each steering pull rod (7) close to a wheel (9) is hinge-connected to a steering knuckle (11) of a suspension wheel assembly, and when the plane where wheels (9) are located is perpendicular to the steering pull rods (7), the two steering pull rods (7) are symmetrical about the vertical radial direction of the wheels (9). The steering power unit is electrically connected to an electronic control unit of an electric automobile, and provided with two levels of power output ends that have the same speed ratio but opposite power output directions. Power input ends of the two transmission units are connected to the two levels of power output ends of the steering power unit respectively, and power output ends of the two transmission units are each connected to the end of the corresponding steering pull rod (7) away from the corresponding wheel (9), to drive the steering pull rod (7) to move back and forth horizontally to propel the wheel (9) to swing. The electric automobile chassis system with four-wheel independent steering and the steering-by-wire mechanism thereof have good steering stability of the wheels, are safe and reliable to use, and have good maneuverability in narrow space.
Description
technical field [0001] The invention belongs to the technical field of electric vehicles, in particular to a four-wheel independent steering chassis system of an electric vehicle and a steering-by-wire mechanism thereof. Background technique [0002] In response to the increasingly prominent contradiction between fuel supply and demand and environmental pollution, new energy vehicles, mainly electric vehicles, have become the development direction of the international automobile industry. In recent years, with the development of electric drive technology and wire control technology, high-mobility electric vehicles integrating in-wheel motors and wire-by-wire steering systems (or called steering-by-wire systems, Steering-By-WireSystem, referred to as SBW) have been obtained. received great attention. Among them, the steer-by-wire system is developed to meet the easy maneuverability design of the car. It is a new generation of steering system developed after the electric powe...
Claims
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IPC IPC(8): B62D5/04B60G3/20B60G13/00
CPCB60G3/20B60G2200/44B62D5/0418B62D7/14
Inventor 徐国卿林桂林刘玢玢
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI