Frequency-modulated multidimensional vibration damper

Abstract

The invention discloses a frequency-modulated multidimensional vibration damper comprising a movable platform, a fixed platform, a first sliding guide rod, a second sliding guide rod and four movable branch chains connecting the movable platform and the fixed platform. The vibration damper is characterized in that the vibration damper is designed on the basis of one multiple freedom degree parallel link mechanism; the four movable branch chains connecting the upper and lower platforms are the same in structure and are arranged symmetrically in the space, each movable branch chain is connected to the movable platform and the fixed platform through a cylindrical pair and a movable pair, spring damping systems are installed in the positions of the movable pairs of the fixed platform, movable adjusting devices are installed in the positions of the spring damping systems, and the multidimensional vibration isolation can be realized. The spring damping systems are capable of moving along the guide rods by rotating a spiral transmission device handle of the spring damping adjusting device, the optimal vibration isolation frequency range value changes, and the frequency modulation function is realized accordingly. The vibration damper is simple in manufacture process, low in cost and convenient to operate and has promised market prospect.

Description

technical field [0001] The invention discloses a frequency-adjustable multi-dimensional damping device. Background technique [0002] The multi-dimensional vibration damping device is a device that can reduce multi-dimensional vibration transmission. It can be widely used in the vibration reduction of ambulance stretchers, car seats, etc., and can also be used in the vibration isolation of various vehicle-mounted, ship-mounted and airborne precision instruments and equipment. get applied. Traditional vibration damping devices mainly insert springs or rubber vibration isolators between the vibration equipment and the foundation, which mainly bear unidirectional compression or tension, and the deformation is small, and the effect of large-amplitude multi-dimensional vibration reduction is not obvious. The parallel mechanism has the advantages of high rigidity, stable structure, strong bearing capacity, large motion stroke, and good dynamic characteristics. In recent years, it...

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Problems solved by technology

However, traditional vibration damping devices are often designed according to a certain frequency. When working at other frequencies, the natural frequency of the system cannot be adjusted accordingly, which greatly reduces the vibration damping effect.

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