A quasi-zero-stiffness vertical vibration isolator capable of adjusting the equilibrium position

Abstract

The invention provides a quasi-zero-stiffness vertical vibration isolator capable of adjusting the equilibrium position, which includes a bearing platform, a base, a positive stiffness spring, a negative stiffness mechanism, a transmission module and a control module. The bearing platform and the base pass through a cylinder and a The cylindrical hole is matched to realize sliding connection. The positive stiffness spring is set on the cylindrical hole and the outside of the cylinder. The negative stiffness mechanism is composed of an inclined guide rod and a negative stiffness spring. One end of the inclined guide rod is hinged with the boss at the bottom of the carrying platform, and the other end is installed Inside the chute on the upper part of the support plate, the transmission module includes a ball screw, a slider nut and a push rod. One end of the push rod passes through the inclined guide rod and is installed at one end inside the chute of the support plate, and the other end is pin-connected with the slider nut. The slider nut cooperates with the ball screw. When the mass of the heavy object carried by the bearing platform changes, the transmission module of the present invention cooperates with the control module, so that the vibration isolator can still be in a quasi-zero stiffness state, has a low dynamic stiffness, and can effectively isolate low-frequency vibrations.

Description

technical field [0001] The invention relates to the technical field of vibration isolators, in particular to a quasi-zero-stiffness vertical vibration isolator that can realize balance position adjustment. Background technique [0002] With the continuous development of science and technology, the status of vibration isolation technology in industrial production is becoming more and more important, especially for low frequency vibration isolation. The initial vibration isolation frequency of the linear vibration isolation system is the natural frequency of the vibration isolation system times, only by reducing the natural frequency of the vibration isolation system can the initial vibration isolation frequency be reduced and the low frequency vibration isolation performance improved. However, reducing the natural frequency of the linear vibration isolation system requires reducing the stiffness of the system. Too low stiffness will lead to excessive static displacement, th...

AI Technical Summary

Problems solved by technology

However, reducing the natural frequency of the linear vibration isolation system requires reducing the stiffness of the system. If the stiffness is too low, the static displacement will be too large, thereby reducing the bearing capacity of the system.

Images