Quasi-zero stiffness vibration isolator based on transverse groove spring

Abstract

The invention discloses a quasi-zero stiffness vibration isolator based on a transverse groove spring, and belongs to the field of vibration isolators. An existing linear vibration isolator cannot simultaneously achieve a wide vibration isolation frequency band and small static displacement. According to the quasi-zero stiffness vibration isolator based on the transverse groove spring, a balance position adjustment structure is arranged on the upper surface of a bottom plate of a supporting frame; a positive stiffness mechanism is arranged on the upper part of the balance position adjustment structure; and the periphery of the positive stiffness mechanism is connected to the inner wall of a side face plate of the supporting frame through a set of negative stiffness mechanisms, and the twoends of the negative stiffness mechanisms are connected with the positive stiffness mechanism and the inner wall of the side face plate of the supporting frame through rotating pairs correspondingly.The dynamic stiffness at the balance position is zero, the vibration isolation performance for ultra-low frequency vibration is improved, and the effect of full frequency band isolation can further beachieved especially for basic excitation.

Description

technical field [0001] The invention relates to a vibration isolator, in particular to a quasi-zero stiffness vibration isolator. Background technique [0002] Most vibrations in engineering are harmful. For example, the vibration of vehicle seats will reduce the ride comfort, the vibration of machine tools will reduce the machining accuracy, and the vibration of optical satellites will reduce the imaging quality, and the list goes on. Therefore, vibration isolation technology is particularly important. The initial vibration isolation frequency of the earliest linear vibration isolator is the natural frequency of the system. For a certain payload, only by reducing the stiffness can the natural frequency be reduced, thereby reducing the initial frequency of vibration isolation and improving the performance of low-frequency vibration isolation. However, if the stiffness is too low, the static displacement will be too large. This contradiction of linear isolators is due to t...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing linear vibration isolator cannot simultaneously realize a wider vibr

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