Composite spring damper capable of pre-setting initial rigidity

Abstract

The invention relates to a composite spring damper capable of pre-setting initial rigidity. The composite spring damper is characterized in that a backward pressing device is further arranged in a guide sleeve; the backward pressing device comprises three or more than three pre-pressing steel wire ropes, steel wire rope direction changing elements as many as the pre-pressing steel wire ropes, and a floating backward pressing steel plate, wherein the pre-pressing steel wire ropes are distributed in an annular space between the guide sleeve and a composite spring in a folding line state; one end of each pre-pressing steel wire rope is symmetrically fixed on the floating backward pressing steel plate around the axis of the guide sleeve, and the other end of each pre-pressing steel wire rope goes around one corresponding steel wire rope direction changing element and then turns back and penetrates through the floating backward pressing steel plate via a fixed point of the pre-pressing steel wire rope on the floating backward pressing steel plate and then is fixed on a second end cover; and the pre-pressing steel wire ropes are tensioned to tension force needed by the preset initial rigidity, so that the composite spring is clamped between a driving member and the floating backward pressing steel plate all the time.

Description

technical field [0001] The invention relates to a building anti-vibration (or vibration) device, in particular to a damping device containing a composite spring. Background technique [0002] The full name of the composite spring is rubber-metal helical composite spring, which is a kind of spring formed by wrapping a layer of rubber material around the metal helical spring and compounding vulcanization. The composite spring has the nonlinear characteristics of the rubber spring, and has the characteristics of large deformation and large load-bearing capacity of the metal coil spring, and its stability and load-bearing capacity are better than those of the rubber spring. Because the composite spring has a working characteristic curve similar to that of a rubber air spring, but is simpler in structure than a rubber air spring, and has no risk of gas leakage, it is also used to replace the rubber air spring and is widely used in mining, metallurgy, coal and other large vibratio...

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 initial 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

The above three means of changing the effective working length of the spring are obviously not suitable for composite springs; in addition, this type of anti-shock absorber not only shortens the effective working length of the spring, but also can only compress energy and reduce vibration, and cannot stretch energy. Vibration reduction

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