Hybrid shock absorber based on Stewart structure

Abstract

The invention discloses a hybrid shock absorber based on a Stewart structure. The hybrid shock absorber comprises an upper top plate, a lower bottom plate and six shock absorption units obliquely arranged between the upper top plate and the lower bottom plate in the circumferential direction. The upper end of each shock absorption unit is connected with the upper top plate through an upper rod endjoint bearing, and the lower end of each shock absorption unit is connected with the lower bottom plate through a lower rod end joint bearing. Every two adjacent shock absorption units are mutually symmetrical, and the included angles between the shock absorption units and the upper top plate and the included angles between the shock absorption units and the lower bottom plate are all equal. Theshock absorption units comprise upper end covers, lower end covers, upper diaphragm springs, magnetic eddy current dampers and lower diaphragm springs, wherein the upper diaphragm springs, the magnetic eddy current dampers and the lower diaphragm springs are sequentially connected from top to bottom. The upper end covers and the upper diaphragm springs are fixed to the upper sides of the magneticeddy current dampers from top to bottom, and the lower diaphragm springs and the lower end covers are fixed to the lower sides of the magnetic eddy current dampers from top to bottom. Through matchedusing of the diaphragm springs and the eddy current dampers, the shock absorption effect is greatly enhanced, the whole hybrid shock absorber is a simple in structure, and six-degree-of-freedom shockabsorption can be achieved.

Description

technical field [0001] The invention relates to the technical field of mechanical vibration, in particular to a hybrid shock absorber based on a Stewart structure. Background technique [0002] Vibration is ubiquitous in human production and life, and some vibrations are useful to human beings, such as vibrating screens. But most of the vibrations are useless or even very harmful to human beings, such as producing noise and causing serious accidents in production and life. Some precision instruments and equipment have extremely strict requirements on the environment, so it is necessary to take vibration reduction measures. In order to eliminate these useless vibrations, many methods of vibration reduction have been studied. Among them, some install isolation devices between the vibration source and the object to be isolated to achieve the effect of vibration isolation, some install damping devices to achieve the purpose of vibration elimination, and some can achieve both v...

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Problems solved by technology

[0004] At present, most commonly used shock absorbers are single-degree-of-freedom or low-degree-of-freedom, and there are not many devices that can achieve six-degree-of-freedom vibration reduction. Some experts and scholars have proposed some six-degree-of-freedom mechanisms, but most of them are difficult to realize , and the Stewart structure is widely used in many fields due to its stability and simple mechanism

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