Vibration damping device

Abstract

The invention provides a vibration damping device. The device comprises an elastic bottom support, a first vibration damping element and a second vibration damping element, wherein a cavity is formedinside the first vibration damping element, the first vibration damping element sleeves outside the second vibration damping element, the second vibration damping element comprises a positive stiffness element, the first vibration damping element comprises a negative stiffness element, the bottom of the first vibration damping element and the bottom of the second vibration damping element are fixed on the elastic bottom support, the top of the first vibration damping element and the top of the second vibration damping element are supported on the bottom of an object subjected to vibration damping, and the first vibration damping element and the second vibration damping element perform parallel support on the object subjected to vibration damping. The vibration damping device applies positive and negative stiffness theoretical design, so that the vibration damping device has high static stiffness and low dynamic stiffness at a static equilibrium position. According to the structure, thenatural frequency of the system is reduced, so that a resonance area is expanded, in addition, the vibration damping device with the high static rigidity and low dynamic rigidity has a smaller displacement transmission rate, a washing machine using the device can be effectively isolated from vibration presented by the object subjected to vibration damping, so that the purpose of vibration dampingis achieved.

Description

technical field [0001] The present invention relates to the technical field of vibration reduction, in particular to a vibration reduction device. Background technique [0002] With the advancement of technology, washing machines are developing towards large capacity and high speed. The washing machine is mostly designed in the shape of a cabinet, and the washing machine is supported by four footings, which are fixed on the chassis of the washing machine by threading. The vibration during washing and dehydration of the washing machine will be transmitted to the ground through the footing, and even resonate with the floor and walls. Secondly, the vibration will cause the washing machine to shift. Therefore, improving the running stability of the washing machine and reducing vibration are the key points in the design of the washing machine. The vibration phenomenon of the washing machine is usually caused by the eccentric load generated by the random distribution of clothes....

AI Technical Summary

Problems solved by technology

There are the following deficiencies in the improvement scheme of the prior art: only the spring is used to provide the supporting force, if the spring stiffness is too small, the supporting force provided is too small, and the static pressure that can withstand is small; if the spring stiffness is too large, when the washing machine vibrates at a high speed Vibration isolation effect is poor

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