Constant-tension buffering mechanism based on hinge zero-stiffness spring

Abstract

The invention discloses a constant-tension buffering mechanism based on a hinge zero-stiffness spring, relates to the technical field of constant-tension buffering devices and the field of low-frequency vibration isolation, and solves the problems that a common triangular zero-stiffness spring is very small in range of keeping zero stiffness and the stiffness characteristic cannot be accurately adjusted. The hinge zero-rigidity spring can keep the rigidity close to zero within a large range near a balance position, the maximum displacement can reach 30-40% of the length of a swing rod, and the rigidity of the hinge zero-rigidity spring at the maximum displacement position is about 1/27 of the rigidity of a vertical spring. The rigidity and restoring force of the hinge zero-rigidity spring are both increased along with increase of vertical displacement, the whole system is in a stable and balanced state, the zero-rigidity characteristic can be accurately adjusted by changing the center distance of the hinge, and the hinge zero-rigidity spring has the advantages of being high in bearing capacity, excellent in zero-rigidity characteristic, convenient to adjust and the like.

Description

technical field [0001] The invention relates to the technical field of constant tension buffer devices, in particular to a constant tension buffer mechanism based on hinge zero stiffness springs. Background technique [0002] Ordinary triangular zero-stiffness springs have strong bearing capacity, but they can only ensure that near the equilibrium position, the maximum displacement is only about 1 / 20 of the length of the lateral spring, and the stiffness is kept close to zero within a small range. If the stiffness deviates from the equilibrium position Rapid increase, the zero stiffness characteristics are not good and difficult to adjust; the flat scroll constant force spring can achieve a wide range of constant tension effects, but the accuracy is not high, the tension error is about 4%, and the bearing capacity is weak, generally only a few kilograms; In terms of low-frequency vibration isolation, the combination of springs and rods is also used to achieve zero stiffness,...

AI Technical Summary

Problems solved by technology

[0002] Ordinary triangular zero-stiffness springs have strong load-bearing capacity, but they can only guarantee that they are near the equilibrium position. The maximum displacement is only about 1 / 20 of the length of the lateral spring, and the stiffness is close to zero in a small range. If the stiffness deviates from the equilibrium position Rapid increase, poor zero stiffness characteristics and difficult to adjust; flat scroll constant force spring can achieve a wide range of constant tension effect, but the accuracy is not high, the tension error is about 4%, and the load capacity is weak, generally only a few kilograms; In terms of low-frequency vibration isolation, the combination of springs and rods is also used to achieve zero stiffness, which also has the problems of poor zero stiffness characteristics and difficult adjustments

[0003] To sum up, ordinary triangular zero-stiffness springs and other zero-stiffness springs have poor zero-stiffness characteristics and are difficult to adjust, and planar scroll constant force springs have problems of low precision and weak load-carrying capacity.

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