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A segmented negative stiffness mechanism and a vibration damping device with the mechanism

A technology of negative stiffness and vibration reduction system, applied in the field of vibration control, can solve the problems of complex structure and few practical applications, and achieve the effect of wide application range, good controllability and simple structure

Active Publication Date: 2017-09-12
SHIJIAZHUANG TIEDAO UNIV
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

[0005] Some traditional structures for achieving negative stiffness mainly include frame structures, compression bar structures, inverted pendulum structures, etc., but due to the complexity of the structure, there are very few practical applications

Method used

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  • A segmented negative stiffness mechanism and a vibration damping device with the mechanism
  • A segmented negative stiffness mechanism and a vibration damping device with the mechanism
  • A segmented negative stiffness mechanism and a vibration damping device with the mechanism

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Embodiment Construction

[0028] In order to make the technical scheme of the present invention and main point clearer, below in conjunction with Figure 1-Figure 8 and specific examples to clearly and completely describe the invention.

[0029] Such as Figure 1 ~ Figure 3 As shown, a segmented negative stiffness mechanism based on a roller-moving cam device includes an outer frame 6, a moving cam 1, two identical pre-compressed elastic telescopic push rods 2, and two sets of identical linear bearings 9; The pre-compressed elastic telescopic push rod 2 includes a push rod 2-1, a roller 2-2, a rod sleeve 5, a guide rod 4 and a compression spring 3 with the same pre-compression amount; one end of the pre-compression spring 3, the rod sleeve 5 and the guide rod 4 are all fixed on the inner side of the outer frame 6; the guide rod 4 horizontally supports the pre-compression spring 3, and the guide rod 4 is in contact with the inner side wall of the pre-compression spring 3, and the other part of the pre-...

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Abstract

The invention relates to a segmented negative stiffness mechanism and a vibration damping device with the mechanism, which includes an outer frame, a pre-compressed elastic telescopic push rod and a moving cam moving in the vertical direction; the moving cam is suspended on the outer frame Inside, one end of the pre-compressed elastic telescopic push rod is kept in a compressed state by a pre-compressed spring, and the other end is provided with a roller that fits the outer surface of the moving cam and rolls. The number of pre-compressed elastic telescopic push rods is greater than or equal to 2. The compressed elastic telescopic push rods are distributed radially and horizontally with the moving cam as the center, and the roller and the moving cam are pressed and rolled; the present invention is a segmented negative stiffness mechanism based on the roller-moving cam device, which has a simple structure and small deformation. It has good controllability and a wide range of applications. Through the compression and stretching of the spring in the horizontal direction, the negative stiffness of the vertical system can be realized; the vibration damping device with a segmented negative stiffness mechanism, through theoretical analysis and simulation research, this The device has a good damping effect.

Description

technical field [0001] The invention relates to a segmented negative stiffness mechanism based on a roller-movable cam structure and a vibration damping device with the mechanism, belonging to the field of vibration control. Background technique [0002] The general definition of stiffness k is the differential of the load on the elastic element to the deformation caused by it, that is, when the load increases with the deformation, the stiffness is positive; when the load remains unchanged with the deformation, the stiffness is zero; the load increases with the deformation When the increase decreases, the stiffness is negative. [0003] With the development of science and technology, the vibration in the high frequency band has been effectively controlled in the field of machinery, but the vibration in the low frequency band has not been effectively solved. For this reason, the control of low-frequency vibration requires a low stiffness of the system. [0004] Negative sti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F15/04F16F15/02
CPCF16F15/02F16F15/04
Inventor 申永军郝岩李向红邢海军温少芳王军杨绍普
Owner SHIJIAZHUANG TIEDAO UNIV
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