Air cylinder

Abstract

The invention belongs to the technical field of pneumatics and particularly relates to an air cylinder. Inlets, two or more first countersunk cavities, second countersunk cavities and outlets are sequentially formed in the upper side and the lower side of a cylinder body in a series-connection manner. The inner walls of the first countersunk cavities and the inner walls of the second countersunk cavities are each provided with a valve cavity, wherein valve plates are bonded to the valve cavities. The two ends of the cylinder body are each provided with an end cover, wherein the end covers areprovided with through holes. A body cavity of the cylinder body is partitioned into a left cavity and a right cavity through a piston. Cover plates are mounted at the upper side and the lower side ofthe cylinder body; a piezoelectric driver is connected into each first countersunk cavity in a pressed manner, so that each driving cavity is formed; and a piezoelectric transducer is connected into each second countersunk cavity in a pressed manner, so that each sensing cavity is formed. The upper inlet, the upper outlet and the driving cavity and the sensing cavity which are in series connectionwith the upper inlet and the upper outlet form an upper driving unit, and the lower inlet, the lower outlet and the driving cavity and the sensing cavity which are in series connection with the lowerinlet and the lower outlet form a lower driving unit. The upper inlet is provided with a first right valve through a pipe and connected with the lower outlet through a pipe and a second right valve.The lower outlet is connected with the right cavity through a pipe, a third right valve and the right through hole. The right cavity is connected with a fourth right valve through a pipe and the rightthrough hole. The lower inlet is provided with a first left valve through a pipe and connected with the upper outlet through a pipe and a second left valve. The upper outlet is connected with the left cavity through a pipe, a third left valve and a left through hole. The left cavity is connected with the a fourth left valve through a pipe and the left through hole.

Description

technical field [0001] The invention belongs to the technical field of pneumatics, and in particular relates to an air cylinder. Background technique [0002] Pneumatic transmission and control systems have the advantages of high energy density, low noise, and no impact, and have been successfully used in various industries in the national economy and defense industry for many years. The traditional pneumatic power system is usually driven by a large electric motor and a mechanical air pump, and realizes the output force, speed and position through the joint operation of multiple types of valves such as reversing valves, pressure reducing valves and speed regulating valves. Therefore, the volume is large, the structural connection and control are relatively complicated, and the application has great limitations: it cannot be used in aerospace, walking robots and other micro systems and remote control systems; at the same time, because the existing pneumatic power system adop...

AI Technical Summary

Problems solved by technology

The traditional pneumatic power system is usually driven by a large electric motor and a mechanical air pump, and realizes the output force, speed and position through the joint operation of multiple types of valves such as reversing valves, pressure reducing valves and speed regulating valves. Therefore, the volume is large, the structural connection and control are relatively complicated, and the application has great limitations: it cannot be used in aerospace, walking robots and other micro systems and remote control systems; at the same time, because the existing pneumatic power system adopts types A large number of air valves are jointly controlled, which makes it difficult to achieve precise control and adjustment of driving force, speed and position, and cannot be used in fields requiring high driving, positioning and control precision, such as precision machining and assembly, precision measurement, and precision optical drive.

Therefore people have proposed various types of miniature cylinders and pneumatic systems, such as Chinese patents 201510843026.7, 201310132556.1, 201410611173.7, etc., because the existing cylinders or pneumatic systems are driven by a fixed frequency, their driving force and speed are affected by the actual work. The load has a great influence. When the resonant frequency of the drive element under specific working conditions deviates greatly from the set excitation frequency, the gas output and pressure will drop significantly, and the drive calculated according to the set drive voltage and frequency will Force and velocity accuracy is also low

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