Pull rod guide type spring damper

Abstract

The invention discloses a pull rod guide type spring damper which comprises two end plates. A compressed spring is arranged between the two end plates. The pull rod guide type spring damper is characterized in that a back pressure device is also arranged between the two end plates, and the back pressure device comprises two sets of prepressing pull rods and two floating pressing plates, wherein each floating pressing plate is arranged between one end plate and the compressed spring, the two sets of prepressing pull rods are symmetrically distributed on the periphery of the compressed spring about the axis of the compressed spring, one ends of each set of prepressing pull rods are fixed to one floating pressing plate, the other ends of each set of prepressing pull rods penetrate through the other floating pressing plate to be fixed to a limiting element together with the corresponding end plate adjacent to the corresponding floating pressing plate, the limiting elements act on the two end plates correspondingly, and the distance between the two floating pressing plates is limited by the two sets of prepressing pull rods to be equal to the length of the compressed spring which is compressed to reach the preset early rigidity.

Description

technical field [0001] This invention relates to shock absorbing devices, and more particularly to dampers employing compression springs. Background technique [0002] A damper is a shock-absorbing device that consumes motion energy by providing motion resistance. The use of dampers to absorb shock is a traditional technology widely used in industries such as aerospace, aviation, military industry, guns and automobiles. Since the 1970s, people have gradually applied the technology of using dampers to absorb and absorb shocks in structural engineering such as buildings, bridges, and railways. [0003] People pursue a comprehensive anti-seismic performance that combines "resistance" and "consumption" for the design of buildings, especially high-rise buildings, that is, under the action of weak wind vibration and small earthquakes, the anti-seismic structure can provide additional protection for the main body of the building The additional rigidity is used to resist external ...

AI Technical Summary

Problems solved by technology

[0005] 1. The load connecting rod is kept balanced under the joint action of two sets of disc springs. Although the pretightening force of the two sets of disc springs can be adjusted, no matter how it is adjusted, the force of the two sets of disc springs on the load connecting rod will The acting forces are a set of equal and opposite forces, and simply applying any external force on the load connecting rod will break this balance and deform the two sets of disc springs, so the damper described cannot preset the early stiffness ;

[0006] 2. The damping coefficient of the disc spring is changed by preloading two sets of disc springs. This change is very limited, which leads to a small adjustment range of the equivalent stiffness of the damper, which often cannot meet the frequency requirements of building isolation;

[0007] 3. In this invention, two sets of disc springs must be used together to provide damping when the damper is under compression or tension load. This not only causes a certain amount of waste, but also greatly increases the length of the damper, which is not suitable for some Use where the installation space is tight

It can be seen that although the stiffness of the spring in the patent application scheme can be changed, the effective working length of the spring is not only significantly shortened, but also can only be compressed for energy consumption and vibration reduction, and cannot be stretched for energy consumption and vibration reduction.

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