Pull-rod spiral spring damper with presettable early-stage rigidity

Abstract

The invention discloses a pull-rod spiral spring damper with the presettable early-stage rigidity. The pull-rod spiral spring damper is characterized in that an adverse pressing device is further arranged in a guide sleeve and comprises two sets of prepressing pull rods and two floating pressing plates; one of the two floating pressing plates is arranged between a movable pressing plate and a cylindrical spiral compression spring, and the other one of the two floating pressing plates is arranged between a second end cover and the cylindrical spiral compression spring; the two sets of prepressing pull rods are respectively distributed in a center hole of the cylindrical spiral compression spring, one ends of one set of prepressing pull rods are respectively fixed onto the floating pressing plate adjacent to the movable pressing plate, and the other ends of the set of prepressing pull rods penetrate through the floating pressing plate adjacent to the second end cover and the second end cover and are fixed onto a limiting element; one ends of the other set of prepressing pull rods are respectively fixed onto the floating pressing plate adjacent to the second end cover, and the other ends of the set of prepressing pull rods respectively penetrate through the floating pressing plate adjacent to the movable pressing plate and the movable pressing plate and are fixed onto a limiting element.

Description

technical field [0001] The present invention relates to shock absorbing devices, and more particularly to dampers employing helical compression springs. Background technique [0002] A damper is a shock-absorbing device that consumes motion energy by providing motion resistance. The use of dampers for energy dissipation and shock absorption 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 consume energy and reduce shocks to structural engineering such as buildings, bridges, and railways. The coil spring damper is widely used in the anti-seismic structures of various buildings because of its high impact resistance, low cost and good shock absorption effect. [0003] People pursue a comprehensive anti-seismic performance combining "resistance" and "loss" for the design of buildings, especially the anti-seismic structure...

AI Technical Summary

Problems solved by technology

However, this utility model patent obviously has the following disadvantages: 1. Two 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 difficult or even impossible to ensure the two springs in the process Only the stiffness of the spring (including tensile stiffness and compression stiffness) is equal, so the shock absorption effect is different in different wind directions; 3. The early stiffness of the damper cannot be changed to achieve the preset wind resistance level and reduce the cost of shock absorption; 4. A helical 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 two working states of tension and compression can only be realized by reducing the elastic deformation range of the helical spring. , which obviously wastes 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.

In addition, the stiffness of the spring is changed by changing the effective working length of the spring. The adjustment range is limited by the material and shape of the spring itself.

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