A vibration damping device for suppressing self-excited shimmy of automobile steering wheel with multiple limit cycles

Abstract

The invention relates to a vibration damping device for suppressing self-exciting vibration of multiple limit rings of an automobile steering wheel. The vibration damping device comprises a pair of start-and-stop mechanisms, a damper and an electromagnetic solenoid; each start-and-stop mechanism comprises a sealing start-and-stop oil cylinder and the like, and cylinder bodies of the start-and-stop oil cylinders are in parallel connection with solenoid valves; connecting arms are arranged at one ends of the start-and-stop oil cylinders; the damper is a variable cross-section damper; and the damper and the electromagnetic solenoid are connected in parallel with the start-and-stop mechanisms. When used, the mounting ends of piston rods of the start-and-stop mechanisms are connected with left and right knuckles of an automobile steering axle correspondingly. When self-exciting vibration of the multiple limit rings appears on an automobile, the damper, the electromagnetic solenoid and the two solenoid valves of the start-and-stop mechanisms get electricity at the same time, the transverse stiffness is adjusted through the electromagnetic solenoid, and the transverse damping is adjusted through the damper, so that vibration of the multiple limit rings of the automobile steering wheel is suppressed; and if vibration is suppressed, the damping device is de-energized, and work is stopped.

Description

technical field [0001] The invention belongs to the technical field of automobile steering vibration damping, and in particular relates to an automobile steering vibration damping device. Background technique [0002] A car is a complex mechanical system, and various vibrations and noises will inevitably occur during driving. The steering wheel shimmy of a car is a situation that seriously endangers all aspects of the performance of the car. [0003] The shimmy is divided into forced shimmy and self-excited shimmy. At present, with the improvement of the manufacturing process, the forced shimmy can be solved by the dynamic balance of the tire; and the self-excited shimmy, if this factor is not considered in the design stage, it must be suppressed after the shimmy occurs. Self-excited shimmy is more difficult. [0004] A large number of studies by scholars at home and abroad have shown that the self-excited shimmy of automobiles belongs to the limit cycle phenomenon caused ...

AI Technical Summary

Problems solved by technology

The self-excited shimmy phenomenon of multiple limit cycles makes the shimmy mechanism more complicated. Once it occurs, it will cause great harm and difficult solution

[0005] The steering damper is generally installed in the steering system, one end is installed on the body or frame, and the other end is installed on the moving parts in the steering transmission mechanism, but most of the current steering mechanisms use power steering, which can be used Reduce shock and ease vibration, so this type of steering damper is not used in practice.

Moreover, there are some problems in the prior art, such as a damping steering rod, but only adding damping rubber to the steering rod can absorb and reduce the impact force transmitted from the steering wheel to the steering wheel, and does not actually solve the steering wheel shimmy question

A steering damper, but only a hydraulic damper hinged between the front axle and the steering straight rod, although it can suppress the steering wheel shimmy to a certain extent, but it cannot actively and continuously adjust the damping, so it has certain limitations

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