Friction-adjustable air cylinder with independent air supply at rear end

Abstract

The invention provides a friction-adjustable air cylinder with independent air supply at a rear end. The friction-adjustable air cylinder comprises an air floatation friction-free air cylinder and a friction control component. The air floatation friction-free air cylinder comprises a piston rod, an air floatation piston, an air cylinder barrel, an air bearing, a front end cover and a rear end cover. The friction control component comprises a swing cylinder and a rotary telescopic assembly. A rotary telescopic rod in the rotary telescopic assembly stretches out or retracts back under the action of a torsional spring or driven by the swing cylinder, so that a rubber mold on the rotary telescopic rod makes contact with or does not make contact with the inner wall of the air cylinder barrel, and the air cylinder is switched between the friction state and the friction-free state. Compressed air needed when the air floatation piston and the friction control component of the friction state controllable air cylinder work is provided by an air source through a conical spiral air pipe at the rear end, so that the air floatation piston and the friction control component are not affected by the pressure of two cavities when working, and the movement of the piston rod of the air cylinder is not interfered.

Description

technical field [0001] The invention relates to the field of cylinders, in particular to a friction controllable cylinder with independent air supply at the rear end. Background technique [0002] Cylinders are widely used in pneumatic systems due to their simple structure and convenient control. However, as one of the main factors affecting the operating performance of the cylinder, the friction force causes the phenomenon of crawling and unstable control of the cylinder during operation. Therefore, it is very necessary to reduce the friction force of the cylinder through the improvement and optimization of the cylinder structure . [0003] In order to reduce the friction of the cylinder and improve the performance of the cylinder, gas lubrication technology is applied to the cylinder. That is, there are several orifices evenly distributed on the surface of the piston, and the compressed air enters the tiny gap between the piston and the cylinder through the orifices, for...

AI Technical Summary

Problems solved by technology

A friction-regeneration controllable frictionless cylinder and a friction-controllable cylinder designed by the above two patents make up for the defect of low servo control precision of the frictionless cylinder movement, but through the air inlet and exhaust holes at the front end of the piston rod Realizing the intake and discharge of the air-floating piston will interfere with the installation of the actuator and the movement of the piston, and the technical solution provided by a frictionless cylinder with controllable friction regeneration will affect the stroke of the cylinder

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