A helical compression spring damper with preset initial stiffness

Abstract

The present invention relates to a helical compression spring damper with the presettable initial stiffness. The helical compression spring damper with the presettable initial stiffness is characterized in that a guide sleeve is further internally provided with a counter pressure device which comprises more than three preloaded wire ropes, wire rope turning components having the same number with the preloaded wire ropes, and a floating counter pressure steel plate, wherein the preloaded wire ropes are distributed in a center hole of a cylindrical helical compression spring in a fold line state, one end of each preloaded wire rope is symmetrically fixed on the floating counter pressure steel plate by winding the axis of the guide sleeve, and the other end of each preloaded wire rope turns back after penetrating and winding the oppose wire rope turning component, and then penetrates the floating counter pressure steel plate alongside the fixation point, on the floating counter pressure steel plate, of the wire rope turning component, to be fixed to a second end cover; and the preloaded wire ropes are tensioned to the tension required for the presettable initial stiffness, so that the helical compression spring damper is always clamped between a drive member and the floating counter pressure steel plate.

Description

technical field [0001] The invention relates to a building anti-vibration (or vibration) device, in particular to a coil spring damping device. Background technique [0002] A damper is a device that provides resistance to movement and consumes movement energy. Since the 1970s, dampers have been gradually transferred from industries such as aerospace, aviation, military, guns, and automobiles to structural engineering such as buildings, bridges, and railways. Coil springs are widely used in devices such as shock isolation and shock absorption due to their variable stiffness characteristics in which the load and deformation are linearly related. Coil springs are classified according to the method of use, mainly including extension springs and compression springs, among which cylindrical helical compression springs are most commonly used in dampers. However, a specific cylindrical helical compression spring can only work in a compressed state within the effective working ran...

AI Technical Summary

Problems solved by technology

However, this utility model patent obviously has the following disadvantages: 1. Two cylindrical coil springs are required, and the length of the entire damper is relatively long, which is not suitable for installation in a space with a small distance; 2. It is impossible or even impossible to guarantee The stiffness of the two springs (including tensile stiffness and compression stiffness) are equal, so the shock absorption effect is different in different wind directions; 3. The stiffness of the damper cannot be changed to achieve the preset wind resistance level and reduce the cost of shock absorption; 4. A cylindrical coil spring works in two states of tension and compression at the same time. The metal material and production process of the existing spring are difficult to meet the requirements. The stretching and compression can only be realized by reducing the elastic deformation range of the cylindrical coil spring. Two working states, which will obviously cause waste of resources

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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