A shock-resistant vibration damper with abrupt stiffness change

Abstract

The invention discloses a stiffness mutation impact-resistant vibration damper and belongs to the field of vibration isolation of precise instruments and equipment. The stiffness mutation impact-resistant vibration damper comprises a mounting plate provided with a vibration isolation object, a lifting shaft connecting the mounting plate with a first lifting plate, an upper cover plate provided with a linear bearing, a cylindrical shell, a compressive spiral spring mounted on the lifting shaft, a second lifting plate provided with a plurality of roll balls on the periphery, a rubber impact column mounted on a lower cover plate and a specially-made butterfly spring mounted on the second lifting plate. A force deformation curve of the specially-made butterfly spring includes two sections of skew lines, and the slope of the first skew line is more than 25 times that of the second skew line. The slope of a force deformation curve of the impact column is 10 times the maximum slope of the specially-made butterfly spring. The stiffness mutation impact-resistant vibration damper is reasonable in structure and capable of conducting automatic regulation according to external excitation.

Description

technical field [0001] The invention relates to the field of vibration isolation of precision instruments and equipment, in particular to a shock-resistant vibration damper with sudden change in stiffness. Background technique [0002] With the development of the electronics industry, the requirements for vibration isolation of electronic equipment are getting higher and higher. Existing widely used dampers mainly include rubber vibration isolators, metal vibration isolators, wire rope vibration isolators and non-resonant peak damping type vibration isolators, but after these The natural frequency will tend to increase or decrease, but the sudden change in stiffness cannot be achieved, that is, when low-frequency vibration isolation is achieved, it is difficult to withstand huge impacts; when high stiffness is used to resist impact, the vibration isolation effect for lower frequency vibration excitation is poor . Therefore, in order to better protect precision electronic e...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved in the present invention is: in view of the technical problems in the prior art such as small stiffness changes, the present invention provides a shock-resistant shock-resistant vibration damper with a reasonable structure and the ability to automatically adjust the stiffness in response to external excitations

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