Friction adjustable air cylinder based on vacuum generator

Abstract

The invention provides a friction adjustable air cylinder based on a vacuum generator. The friction adjustable air cylinder comprises an air flotation friction-free air cylinder and a friction adjusting module, wherein the air floatation friction-free air cylinder comprises a front end cover, an air cylinder barrel, a rear end cover, an air bearing, a piston rod and an air floatation piston; and the friction adjusting module is arranged at the rear end of the air floatation piston and comprises a sealing assembly, a vacuum generator and an air supply pipe, and a sealing ring assembly in the sealing assembly is in a bouncing state under the action of an embedded annular elastic body. When the vacuum generator works, the embedded annular elastic body is bent inwards, so that the sealing ring assembly does not make contact with the inner wall of the air cylinder barrel; and when the vacuum generator does not work, the embedded annular elastic body can rebound, so that the sealing ring assembly makes contact with the inner wall of the air cylinder barrel, the friction state of the air cylinder is adjusted, and therefore the air cylinder has high-precision motion servo control and high-precision force servo control.

Description

technical field [0001] The invention relates to the field of cylinders, in particular to a friction-adjustable cylinder based on a vacuum generator. Background technique [0002] The pneumatic system is a system that uses compressed air as the working medium for energy and signal transmission and control. As the most commonly used actuator in pneumatic systems, cylinders are widely used in industrial automation, robotics and other fields. However, when the cylinder moves at low speed, due to the influence of friction, the cylinder will produce a "crawling" phenomenon during the movement, which limits the performance of the cylinder to a large extent and affects the control accuracy of the system. Therefore, it is very necessary to optimize the design of the cylinder to improve the performance of the cylinder. [0003] In some practical applications, in order to improve work efficiency, it is often necessary: ​​when the cylinder is quickly approaching the workpiece, the cyl...

AI Technical Summary

Problems solved by technology

The two patents mentioned above are to ventilate the air-floating piston from the front end of the piston rod, which will affect the installation of the actuator at the front end of the piston rod, and in the technical solution provided by a frictionless cylinder with controllable friction regeneration, the concave hole The depth limits the stroke of the cylinder under friction, that is, the stroke of the cylinder will be limited by the length of the piston

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