Tensioning support device

Abstract

The invention discloses a tensioning support device which comprises a load platform, a foundation platform, three support rod pieces and three sets of pressure-bearing sliding block devices, wherein the three support rod pieces are mutually staggered in space and are arranged between the load platform and the foundation platform in a non-interference mode; the pressure-bearing sliding block device comprises a guide rail base, a sliding block, a lower buffer spring and a sliding block tail stopper, the lower ends of the three support rod pieces are hinged to the sliding block through universal joints respectively, and the upper ends of the three support rod pieces are hinged to the load platform through universal joints respectively; the upper ends of the three support rod pieces are connected in pairs through upper tension springs, and the initial state of the three upper tension springs is a stretching state; the adjacent upper ends and the adjacent lower ends of the three support rod pieces are connected in a staggered mode through tensioning of inclined pulling ropes. The characteristics of light weight, simple structure and compact size of the whole structure of the three support rod pieces are fully utilized, and the distance between the load platform and the foundation platform is compressed through sliding of the pressure-bearing sliding block devices without changing the length of the supporting rod pieces, so that the purpose of vibration reduction is achieved.

Description

technical field [0001] The invention relates to the technical field of vibration damping devices, in particular to a tension support device. Background technique [0002] In the technical fields of rail transportation, aerospace and national defense, etc., the requirements for vibration reduction and noise reduction, safety and comfort, extended service life, and resistance to vibration fatigue and impact interference are getting higher and higher. The development of technology faces new challenges. For example, shipboard and airborne equipment are easily affected by the interference of foundation vibration, resulting in unstable working performance, so there is an urgent need for vibration reduction and vibration isolation devices. At present, shipboard and airborne equipment mainly use unidirectional vibration damping devices such as steel wire ropes or springs, but they lack the effect of multidirectional vibration damping. Existing multi-directional damping devices mai...

AI Technical Summary

Problems solved by technology

For example, Chinese Invention Patent Application 202010494535.4 "A Prismatic Tensile Integral Quasi-Zero Stiffness Vibration Isolator", the coil spring used to provide positive stiffness is directly connected to the bearing platform and the base along the vertical direction, and can be used in the vertical direction Stiffness control, but for impacts from other directions, the vibration damping effect cannot be achieved

Another example is the Chinese patent ZL201611002397.3 "A Tensile Integral Vibration Isolation Mechanism", which can achieve multi-directional vibration reduction, but it uses a rigid-flexible mixed branch chain connected in series with a compression spring to support the working platform, and the compression deformation direction of the spring is the same as the The direction of the supporting force provided by the rigid-flexible mixed branch chain coincides, so there is a problem of insufficient structural rigidity, and in the case of external oblique vibration impact, the spring may be subjected to shear force and cannot provide support; secondly, the piston The rod and the spring are fixed by welding, which is not conducive to later maintenance, and is prone to structural deformation during welding, which has a great impact on the positioning accuracy of the working platform; The lower end is fixedly connected, and there is also the problem of inconvenient installation; although the hydraulic drive device used can achieve multi-directional vibration reduction and active folding, it will greatly increase the weight of the entire structure, and it also has a high impact on the hydraulic system circuit and control. Requirements, and the hydraulic drive control accuracy is generally not high, so it is not suitable for vibration isolation and vibration reduction of precision instrument platforms

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