A frictionless constant force output air flotation device with volume compensation

Abstract

The invention provides a friction-free constant-force-output air-floating device with the volume compensation function. The air-floating device comprises an output air cylinder, a compensating air cylinder and an air storage tank, wherein the output air cylinder comprises a cylinder barrel and a long piston, the compensating air cylinder comprises a connecting bar piston rod and a compensating barrel, the cylinder barrel and the compensating barrel are arranged in the air storage tank in a sleeved mode respectively, an air storage cavity is formed among the air storage tank, the cylinder barrel and the compensating barrel and divided into an upper air storage cavity and a lower air storage cavity which are independent of each other, and an inner cavity of the cylinder barrel and an inner cavity of the compensating barrel are communicated with the lower air storage cavity; the long piston is arranged in the cylinder barrel in a sleeved mode, an extremely small gap exits between the long piston and the cylinder barrel, and the connecting bar piston is arranged in the compensating barrel in a sleeved mode. The friction-free constant-force-output air-floating device with the volume compensation function further comprises a ball screw, a motor, a laser displacement sensor and a reflecting plate, the compensating air cylinder and the air storage tank are additionally arranged, and due to the volume compensation and air pressure control, accurate and high-speed constant force output can be achieved.

Description

technical field [0001] The invention relates to a constant force output device. Background technique [0002] According to different application environments and application requirements, there are various structures and implementation methods for constant force output. Dynamic constant force output refers to loading a constant force value on a dynamically moving target workpiece. [0003] Hanging the target workpiece through weights is the simplest and most commonly used method of applying constant force. Since the mass of the weight is constant, the force acting on the target workpiece remains unchanged, but when the target workpiece is accelerating or decelerating, the weight The weight will generate an additional force acting on the target workpiece due to the influence of its own inertial force, and the greater the mass of the weight, the greater the effect, so this method is only suitable for low-speed or uniform-speed movement of the target workpiece. Torque motors,...

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Problems solved by technology

[0004] Aiming at the problems in the existing constant force output device that the output force value is difficult to keep constant, the sensor measurement is not accurate enough, and the constant force output accuracy is not high, the present invention provides a frictionless constant force device with volume compensation, accurate output force value and good stability. Output air flotation device

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