Vibration isolation device of parallel damping oil cylinder

Abstract

The invention discloses a vibration isolation device of a parallel damping oil cylinder, and belongs to the technical field of vibration isolation. The vibration isolation device of the parallel damping oil cylinder comprises an inverted pendulum, an air spring and the damping oil cylinder. The inverted pendulum comprises an inverted pendulum rod, a top plate, an upper piston and a lower piston. The inverted pendulum rod penetrates the upper piston and the lower piston to be located in a U-shaped groove. The air spring comprises an annular body with the open upper end and the open lower end, a bottom plate arranged below the annular body, a press ring, a rubber membrane, the upper piston and the lower piston, wherein the press ring and the rubber membrane are arranged above the annular body. The damping oil cylinder comprises an oil cylinder barrel, an oil cylinder bottom plate, an oil cylinder cover plate and damping oil. A round through hole is formed in the oil cylinder cover plate. A piston rod is inserted in the through hole. An oil cylinder piston is arranged at the bottom end of the piston rod. One end of the oil cylinder bottom plate extends to be fixedly connected with the annular body. By means of the vibration isolation device, low inherent frequency, in the vertical direction and the horizontal direction, of a vibration isolator can be achieved at the same time, and the stability of the vibration isolator can be achieved.

Description

technical field [0001] The invention relates to the technical field of vibration isolation, in particular to a vibration isolation device for parallel damping oil cylinders. Background technique [0002] Air springs and inverted pendulums (also called inverted pendulums) are widely used in vibration isolation systems in various precision and ultra-precision machinery fields due to their outstanding advantages such as simple manufacturing and processing, low cost, and good vibration isolation performance. Air springs have low vertical stiffness and are widely used in various vertical vibration isolation mechanisms. Inverted pendulums have low horizontal stiffness and are widely used in various horizontal vibration isolation mechanisms. The two are used in series The equivalent horizontal stiffness of the final vibration isolator is approximately the horizontal stiffness of the inverted pendulum, and the equivalent vertical stiffness is approximately the vertical stiffness of ...

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Problems solved by technology

However, in the above two inventions, the stability of the vibration isolator system is not considered, and there is no related structural design

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