A Composite Spring Damper with Presettable Early Stiffness

Abstract

The invention discloses a composite spring damper with early rigidity capable of being preset. The composite spring damper is characterized in that a back pressure device is arranged in a guide sleeve, and the back pressure device comprises two sets of prepressing steel cables with the number being three or more in each set and two floating pressing plates, wherein the two sets of prepressing steel cables are symmetrically distributed in the annular space between a composite spring and the guide sleeve in a linear state about the axis of the guide sleeve correspondingly, one ends of one set of prepressing steel cables are fixed to the floating pressing plate adjacent to a second end cover respectively, the other ends of the set of prepressing steel cables penetrate through the floating pressing plate adjacent to a driving component to be fixed to the driving component respectively, one ends of the other set of prepressing steel cables are fixed to the floating pressing plate adjacent to the driving component, the other ends of the set of prepressing steel cables penetrate through the floating pressing plate adjacent to the second end cover to be fixed to the second end cover respectively, the two sets of prepressing steel cables are tensioned, and therefore the composite spring is always clamped between the two floating pressing plates.

Description

technical field [0001] The present invention relates to a shock absorbing device, in particular to a damper using 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 vibration equipment. It can reduce ...

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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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