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A scissor type quasi-zero stiffness vibration isolator and its working method

A technology of quasi-zero stiffness and vibration isolators, which is applied in the direction of shock absorbers, shock absorbers, springs/shock absorbers, etc., can solve the problem of difficulty in isolating low-frequency vibrations, complex structures of quasi-zero stiffness vibration isolators, and short effective strokes. problems, to achieve the effect of easy processing and realization, simple structure and large effective stroke

Active Publication Date: 2018-05-08
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to solve the shortcomings of the existing linear vibration isolators that are difficult to isolate low-frequency vibrations and the existing quasi-zero stiffness vibration isolators with complex structures and short effective strokes. Based on the principle of parallel connection of positive and negative stiffnesses, a Scissor type quasi-zero stiffness vibration isolator and its working method

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  • A scissor type quasi-zero stiffness vibration isolator and its working method
  • A scissor type quasi-zero stiffness vibration isolator and its working method
  • A scissor type quasi-zero stiffness vibration isolator and its working method

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Embodiment Construction

[0042] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0043] Such as figure 1 and figure 2 As shown, the present invention discloses a scissor-type quasi-zero stiffness vibration isolator, which includes a support base, a positive stiffness module, a negative stiffness module and a support plate, and the positive stiffness module includes at least one positive stiffness unit.

[0044] The positive stiffness unit includes a support spring, a guide shaft and a linear bearing, wherein the linear bearing passes through the support base and is fixed on the support base; the guide shaft matches the linear bearing, and one end is fixedly connected to the lower wall of the support plate, The other end passes through the linear bearing and can slide up and down along the linear bearing; the support spring is sleeved on the guide shaft, one end is fixedly connected with the support plate, and the other end is...

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Abstract

The invention discloses a shear type quasi zero rigidity vibration isolator and a work method thereof. The shear type quasi zero rigidity vibration isolator comprises a supporting base, a positive-rigidity module, a negative-rigidity module and a supporting plate. The positive-rigidity module comprises at least one positive-rigidity unit. The negative-rigidity module comprises a first upper support, a second upper support, a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a fifth connecting rod, a sixth connecting rod, a seventh connecting rod, an eighth connecting rod, a first lower support, a second lower support, a first horizontal connecting shaft, a second horizontal connecting shaft and at least one horizontal spring. For the defects that an existing linear vibration isolator can difficultly isolate low-frequency vibration and an existing quasi zero rigidity vibration isolator is complex in structure and short in effective stroke, the shear type quasi zero rigidity vibration isolator has high static rigidity and low dynamic stiffness based on the positive and negative rigidity parallel principle, can isolate low-frequency or ultra-low-frequency vibration and is easy to machine and achieve, high in bearing capability and high in reliability.

Description

technical field [0001] The invention relates to a low-frequency or ultra-low-frequency nonlinear vibration isolation device, in particular to a scissor-type quasi-zero-stiffness vibration isolator and a working method thereof, which are suitable for vibration isolation systems of automobiles, ships, and submarines. Background technique [0002] The ride comfort of a car is directly related to the driver's fatigue, discomfort and safety. Commercial vehicle drivers are often in overloaded and harsh working environments. Drivers are mainly affected by high-amplitude low-frequency vibrations, and the natural frequencies of the main organs of the human body are distributed in the low-frequency region of 2-7 Hz, so low-frequency vibrations are a major cause of driver health problems. The traditional seat suspension adopts the linear vibration isolation technology, only when the excitation frequency is greater than the natural frequency The vibration isolation effect can only be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F7/00F16F15/067B60N2/54B63B29/04
CPCB60N2/544B63B2029/043F16F7/00F16F15/067
Inventor 程春李舜酩王勇谭延峥
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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