Two-way control low-friction cylinder

Abstract

The invention relates to the air cylinder field and aims at providing a two-way control low-friction air cylinder, which comprises a machine cover F and a machine cover R, wherein the engine cover F and the engine cover R are arranged at the two sides of an air cylinder body; a low-end diaphragm is sleeved at one end of the head part of a piston in the air cylinder; the diaphragm opening direction of the low-end diaphragm is fixed at the inner side of one end of the air cylinder body by a low air cylinder lining to form a low diaphragm air cavity; an upper-end diaphragm is also sleeved at a part of the tail part of the piston; openings are formed at the two ends of the upper-end diaphragm; the opening at one end is also fixed to the inner side of the other end of the air cylinder body by an upper air cylinder lining; the opening at the other end is pressed to a piston body after being fixed by a buckle plate A and a buckle plate B, and an upper diaphragm air cavity is formed at the tail part of the piston; an air exhaust port F and an air exhaust port R are formed in the machine cover F and the machine cover R respectively; and the air exhaust port F and the air exhaust port R are communicated with the upper-diaphragm air cavity and the lower-diaphragm air cavity correspondingly. According to the two-way control low-friction air cylinder disclosed by the invention, the stroke of the piston is controlled by virtue of the pressure difference of the two cavities, so that the accuracy is high, and the reaction speed is quick, and therefore, the two-way control low-friction air cylinder can work under a micro pressure of 0.002MPa and also can stably work under a low-speed state. Compared with other air cylinders, the two-way control low-friction air cylinder is better in tightness, capable of saving air sources, capable of reducing the energy consumption, and long in service life.

Description

technical field [0001] The invention relates to the field of cylinders, in particular to a two-way control low-friction cylinder. Background technique [0002] Low-friction cylinders refer to cylinders with small piston sliding resistance, most of which are diaphragm cylinders. Diaphragm cylinder is an actuator sealed by a diaphragm bag (referred to as cylinder diaphragm), which is airtight, does not require lubrication, and has low friction. It can provide pushing, lifting, fastening, and winding in various applications. , the power required for rotation and other linear movements, so it has a good market prospect. [0003] At present, the common low-friction cylinders are all single-acting (single cylinder diaphragm). The cylinder diaphragm is cylindrical with one end open, and the bottom surface of the cylinder is in contact with the piston head of the cylinder. As the piston head advances, the cylinder diaphragm occurs The surface of the piston rolls over, thereby redu...

AI Technical Summary

Problems solved by technology

[0003] At present, the common low-friction cylinders are all single-acting (single cylinder diaphragm). The cylinder diaphragm is cylindrical with one end open, and the bottom surface of the cylinder is in contact with the piston head of the cylinder. As the piston head advances, the cylinder diaphragm occurs The surface of the piston rolls over, thereby reducing the frictional resistance between the piston and the cylinder; the other end of the piston is provided with a return spring. When the cylinder is working, it must first overcome the reaction force of the spring before it can move. Crawling phenomenon, when the cylinder returns, it is reset by the reaction force of the spring; due to its own shortcomings in the sensitivity and service life of the mechanical spring, the output force stability and cylinder response sensitivity of the low-friction cylinder with the above structure are not optimal. good

[0004] In addition, the connection between the opening of the traditional cylinder diaphragm and the height of the diaphragm naturally forms a transition surface, and the angle value is arbitrary; but practice has found that if this angle is not available or is too small, the effective area of ​​the cylinder diaphragm will be reduced. If the angle is increased, the impact force will become larger, and the life of the cylinder will be greatly reduced; if the angle is too large, the effective area of ​​the cylinder diaphragm will be reduced, making the required air source larger, and the energy consumption will be reduced. reduce; therefore, the value of this transition angle must be limited

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