Two-degree-of-freedom positive-negative rigidity parallel low-frequency vibration isolating device

Abstract

The invention relates to a two-degree-of-freedom positive-negative rigidity parallel low-frequency vibration isolating device, and belongs to the technical field of vibration isolation. The device comprises an upper-layer vibration isolating device and a lower-layer vibration isolating device; magnets not contacted with each other form negative-rigidity mechanisms of the lower-layer vibration isolating device; slide blocks, springs and the like form positive-rigidity mechanisms of the lower-layer vibration isolating device; a low-frequency vibration isolating device formed by parallel connection of the lower-layer positive-rigidity and negative-rigidity mechanisms can effectively isolate horizontal impact to damped objects; pressure springs, adjusting screws, pressure rods and the like ofthe upper-layer vibration isolating devices form negative-rigidity mechanisms; support springs, connecting plates and the like of the upper-layer vibration isolating devices form positive-rigidity mechanisms; a low-frequency vibration isolating device formed by parallel connection of the upper-layer positive-rigidity and negative-rigidity mechanisms can effectively isolate vertical vibration impact to the damped objects. The upper and lower layers of vibration isolating devices are connected through a middle platform to form a two-degree-of-freedom vibration isolating device; and the device iscompact in structure, and achieves higher engineering application value in the fields of automobiles, precise instruments, unmanned automatic warehousing and the like.

Description

technical field [0001] The invention relates to a two-degree-of-freedom positive and negative stiffness parallel low-frequency vibration isolation device, which belongs to the field of vibration isolation technology and can be widely used in low-frequency vibration isolation in the fields of vehicles, unmanned storage trolleys, and precision instruments. Background technique [0002] Vibration is a common phenomenon in mechanical engineering, and vibration is harmful in many cases. For example, mechanical vibration not only damages the precision and life of mechanical equipment, but also generates noise, which affects the stability of mechanical equipment and the surrounding environment. produce adverse effects. With the advancement of Made in China 2025 and Industry 4.0, the power and speed of operating machinery continue to increase, and vibration isolation technology for equipment in the field of mechanical engineering has become a problem that needs to be solved. In the...

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Problems solved by technology

[0005] Chinese patent document CN 106321707 A discloses a two-degree-of-freedom ultra-low frequency vibration isolator, but it uses inverted pendulums, air springs and other structural vibration isolators, and its own structure is unstable and is not easy to implement; Chinese patent document CN 104033535A discloses A three-dimensional vibration isolation device suitable for low-frequency vibration. Although it is divided into upper and lower layers, the upper part and the lower part are only supported by the middle guide pillar. Under the vibration signal excitation, the upper part will be unstable.

[0006] The disadvantage of the above technical solution is that it can only perform simple unidirectional vibration isolation, and cannot meet the vibration isolation requirements of the isolated object whose quality changes

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