A Stiffness Adjustable Variable Damping Back Vibration Isolator

Abstract

The invention relates to a variable damping back vibration isolator with the adjustable rigidity. The back vibration isolator comprises a shell and a center shaft, the center shaft is vertically arranged in the shell, horizontal vibration attenuation cavities are formed in the upper end and the lower end of the shell respectively, the upper end and the lower end of the center shaft are located in the two horizontal vibration attenuation cavities respectively, and adjusting devices used for adjusting the horizontal movement rigidity and damping of the center shaft are arranged in the two horizontal vibration attenuation cavities respectively; damping baffle rings are arranged at the two ends of the back vibration isolator, along with increase of the horizontal displacement, damping is increased, and therefore the vibration isolator can absorb energy easily and has a better buffering effect.

Description

technical field [0001] The invention relates to an adjustable stiffness variable damping back vibration isolator. Background technique [0002] With the development of modern military, the weight of weapons and equipment increases and the center of mass is higher, and the overturning moment generated also increases accordingly. Therefore, the following requirements are put forward for the back vibration isolator of vibration isolation, buffering and anti-overturning moment: [0003] 1. It can ensure the stability and normal operation of electronic equipment under mechanical environmental conditions such as large centrifugal acceleration, large overturning moment, and large impact; [0004] 2. The back vibration isolator has the ability of vibration isolation and buffering in both horizontal axes, and plays a guiding role in the vertical direction. In the horizontal direction, as the displacement of vibration and impact increases, the stiffness and damping of the back vibrat...

AI Technical Summary

Problems solved by technology

[0007] First of all, the back vibration isolator uses a wire mesh forming pad as a buffer pad, and at the same time provides the stiffness of the vibration isolator, but the wire mesh pad is easy to deform and difficult to recover, which will affect the horizontal stiffness of the back vibration isolator;

[0008] Secondly, although the back vibration isolator has been improved and added a plane spring, which is beneficial to the reset of the central axis of the back frame vibration isolator, the stiffness consistency of the plane spring in all horizontal directions is poor, resulting in the horizontal composite of the back frame vibration isolator. Inconsistent stiffness;

[0009] Finally, there is no damper in the back frame compartment, and the horizontal damping is only provided by the friction between the sliding plates at both ends and the adjusting nut. When the vibration isolator is impacted, the horizontal damping does not increase with the increase of displacement. Not conducive to rapid energy absorption

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