Variable-rigidity semi-active suspension

Abstract

The invention provides a variable-rigidity semi-active suspension which comprises an upper connecting ring, a lower connecting ring, an upper spring support, a lower spring support and a rigidity adjusting device. The upper spring support is fixed to the lower end face of the upper connecting ring. The lower spring support is fixed to the upper end face of the lower connecting ring. The rigidity adjusting device comprises a piston rod, a rotor, a stator and a sleeve. The rotor and the stator are located in the sleeve, and the rotor, the stator and the sleeve are coaxial. The piston rod penetrates the centers of the rotor, the stator and the sleeve. The piston rod is fixed to the lower end of the upper connecting ring. The rotor is fixed to the outer wall of the piston rod. The stator is fixed to the inner wall of the sleeve and a magnet exciting coil is fixed to the stator. A gap is reserved between working surfaces of the rotor and the stator and small teeth which are arranged at equal intervals and are equal in width are distributed in the axial directions of the working surfaces. The magnet exciting coil is connected with a controller. By the adoption of the variable-rigidity semi-active suspension, the rigidity and damping can be controlled independently, the smoothness and comfort of a vehicle can be improved, and vibration is attenuated; and when a control part of the suspension fails, the vibration reducing performance of a passive suspension still can be achieved.

Description

technical field [0001] The invention belongs to the field of vehicle suspension structures, in particular to a semi-active suspension with variable stiffness. Background technique [0002] Suspension is the general term for all force transmission connection devices between the frame and the wheels. Its main function is to transmit force and torque, buffer the impact force generated by the road surface, and reduce the vibration caused by it, so as to ensure that the car can run smoothly. . At present, the passive suspension is still widely used in vehicles, its stiffness and damping are not adjustable, and it is only suitable for a single road condition. [0003] With the development of the automobile industry, people have proposed semi-active suspension and active suspension with better performance. Although both active suspension and semi-active suspension can optimize vehicle ride comfort according to different road surfaces, active suspension consumes a lot of energy an...

AI Technical Summary

Problems solved by technology

[0005] Chinese patent 20110457008.7 discloses an electromagnetic spring shock absorber, which uses the attraction and repulsion of the electromagnet to suppress the vibration of the vehicle body and adjust the height of the vehicle body, but its stiffness and damping control are coupled and cannot be controlled separately, and vibration energy cannot be recovered. Also does not take into account the "fail-safe" nature of the suspension, when the suspension control unit fails, the suspension will not work properly

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