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

A technology with positive and negative stiffness and degrees of freedom, applied in the direction of shock absorbers, spring/shock absorber functional characteristics, shock absorbers, etc. , the effect of weakening the vibration signal and strong bearing capacity

Active Publication Date: 2018-06-15
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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

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Embodiment 1

[0040] A two-degree-of-freedom positive and negative stiffness parallel low-frequency vibration isolation device, including an upper vibration isolation device 23 and a lower vibration isolation device 22;

[0041] The lower floor vibration isolation device 22 includes a mobile base 3, the upper surface of the mobile base 3 is provided with a support 21, the support 21 is provided with a guide rail 18, the guide rail 18 is provided with a spring 20 and a slide block 19, one end of the spring 20 is connected with the support 21, and the spring The other end of the 20 is connected to the slide block 19, and the upper surface of the mobile base 3 is also provided with a magnet.

[0042]The upper layer vibration isolation device 23 includes an intermediate connection platform 2, a support slider 11, and a carrier connection platform 1. A support spring guide post 12 is provided through a bolt above the intermediate connection platform 2, and a support spring 13 is sleeved on the su...

Embodiment 2

[0047] A two-degree-of-freedom positive and negative stiffness parallel low-frequency vibration isolation device, its structure is as described in Embodiment 1, the difference is that the mobile base 3 is a rectangular flat plate, the number of brackets 21 is four, and the brackets 21 are arranged on the mobile base 3 On the four corners, the brackets 21 are symmetrically arranged on the upper surface of the mobile base 3 at intervals of 90° by bolts; There are two guide rails 18 , and the guide rails 18 are connected between two opposite brackets 21 . The guide rail 18 is a cylinder, and the sides of the slide block 19 are bolted to the middle connecting platform 2 . The axes of the two guide rails 18 are parallel to each other, and the axes of the two guide rails 18 are located in the same horizontal plane.

Embodiment 3

[0049] A two-degree-of-freedom positive and negative stiffness parallel low-frequency vibration isolation device, its structure is as described in Embodiment 2, the difference is that the plane facing each other between the magnets is parallel to the axis of the guide rail.

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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...

Claims

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Application Information

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IPC IPC(8): F16F7/00
CPCF16F7/00F16F2222/06F16F2228/06F16F2228/063
Inventor 胡天亮魏永利陶飞张承瑞
Owner SHANDONG UNIV
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