Quasi-zero stiffness metal-rubber composite vibration isolator

Abstract

The invention discloses a quasi-zero rigidity type metal and rubber composite vibration isolator. The quasi-zero rigidity type metal and rubber composite vibration isolator comprises an upper connecting steel plate, a metal and rubber composite circular column, a cylindrical spiral spring and a lower connecting steel plate, wherein the metal and rubber composite circular column comprises a rubbercircular column and a metal skeleton which are connected; a circular bulge A is arranged at the lower surface of the upper connecting steel plate, and is positioned in the rubber circular column; oneend of the cylindrical spiral spring extends into the metal skeleton, and the other end of the cylindrical spiral spring is connected with a circular bulge B at the upper surface of the lower connecting steel plate. The quasi-zero rigidity type metal and rubber composite vibration isolator has the advantages that the static rigidity is high, the dynamic rigidity is low, and the problem of interference to equipment by low-frequency and small-amplitude vibration is solved; the cost is low, the mold processing is simple, and the quasi-zero rigidity type metal and rubber composite vibration isolator is suitable for batch production.

Description

technical field [0001] The invention relates to the technical field of mechanical vibration, in particular to a quasi-zero-rigidity metal-rubber composite vibration isolator. Background technique [0002] The application of precision instruments and equipment is very extensive, but the problem of low-frequency vibration isolation comes with it. At present, the latest quasi-zero stiffness theory is used at home and abroad to solve low-frequency vibrations. There are not many researchers on such problems, and two methods are generally used: one is to connect negative pressure air and rubber in parallel, and combine negative pressure air with rubber flexures; the other One is that the elastic element is connected in parallel with the spring, and two oblique springs and a vertical spring are connected in parallel. In addition, geometric nonlinear mechanisms and magnetic negative mechanisms are used to provide negative stiffness. Although these structures can reduce the natural...

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Problems solved by technology

[0003] In order to solve the defects in the prior art, the present invention provides a quasi-zero-stiffness metal-rubber composite vibration isolator, which has high static stiffness and low dynamic stiffness, can solve the problem of low-frequency and small-amplitude vibrations interfering with equipment, and is low in cost. Simple processing, suitable for mass production

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