Vibration isolation platform composed of two sets of inclined springs

Abstract

A vibration isolation platform composed of the two sets of inclined springs comprises the two sets of inclined springs, a vertical spring and an object carrying platform, the two sets of inclined springs are arranged at the two sides of the object carrying platform and comprise the two pairs of inclined springs which are symmetrically arranged up and down, the two pairs of inclined springs comprise two pairs of inclined springs which are symmetrically arranged up and down, and the two pairs of inclined springs comprise four inclined springs which are symmetrically arranged left and right. Oneend of each inclined spring is movably connected with the object carrying platform, and the other end is movably connected with a movable seat I. The vertical spring is arranged at the lower portion of the object carrying platform, one end of the vertical spring is movably connected with the lower portion of the object carrying platform, and the other end is fixedly connected with a movable base II. According to the vibration isolation platform, the inclined springs are adjusted by adjusting the positions of the sliding pieces and the supporting columns, so that the negative stiffness generated by the two sets of inclined springs counteracts the positive stiffness of the vertical spring to achieve the purposes of zero dynamic stiffness, a wider zero-stiffness characteristic interval and abetter vibration reduction effect, and the vibration reduction performance of the vibration isolation platform is improved.

Description

technical field [0001] The invention belongs to the technical field of vibration isolation, and in particular relates to a vibration isolation platform composed of double sets of oblique springs. Background technique [0002] The so-called quasi-zero stiffness shock absorber is a vibration isolation platform with high static stiffness and low dynamic stiffness. High static stiffness means high load capacity or small static load deformation, and low dynamic stiffness means low or close to zero. natural frequency. The shock absorber with this characteristic is mainly to solve the following problems caused by the traditional linear shock absorber composed of mass m and stiffness k: because the effective vibration isolation frequency of the linear shock absorber is greater than the natural frequency twice the root number (k / m The square root sign), so if a wider vibration isolation frequency range is to be obtained, the stiffness k of the linear damper needs to be infinitely sm...

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Problems solved by technology

The shock absorber with this characteristic is mainly to solve the following problems caused by the traditional linear shock absorber composed of mass m and stiffness k: because the effective vibration isolation frequency of the linear shock absorber is greater than the natural frequency twice the root number (k / m square root sign), so if a wide frequency range of vibration isolation is to be obtained, the stiffness k of the linear damper needs to be infinitely small (the natural frequency is closer to 0), but this will cause extremely large static deformation

[0004] In the design and characteristic research of the new quasi-zero stiffness vibration isolator announced by Meng Lingshuai in 2015, a quasi-zero stiffness (QZS) vibration damper composed of a single set of oblique springs is mentioned, such as image 3 shown, but this kind of shock absorber with quasi-zero stiffness characteristics only maintains a very narrow range near the static equilibrium point

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