Piston type three-position pressure cylinder

Abstract

The invention relates to a piston type three-position pressure cylinder which comprises a cylinder body. A front end cover is arranged at the front end of the cylinder body, a rear end cover is arranged at the rear end of the cylinder body, a spigot positioning portion or a boss is arranged on the inner wall of the cylinder body in the circumferential direction, a piston is arranged in the cylinder body, one end of the piston is sleeved with an auxiliary piston ring, the auxiliary piston ring is in airtight contact with the inner wall of the cylinder body, a spigot positioning part or a boss is arranged on the piston in the circumferential direction, the spigot positioning part blocks the auxiliary piston ring, the other end of the piston is connected with an output shaft, the output shaft penetrates through the front end cover, an air inlet is formed in one end of the cylinder body, a second air inlet is formed in the other end of the cylinder body, the air inlet is communicated with a first air inlet pipe, the second air inlet is communicated with a second air inlet pipe, an exhaust valve and an air inlet valve are connected onto the first air inlet pipe in series, and a second air inlet valve and a second exhaust valve are connected onto the second air inlet pipe in series. According to the piston type three-position pressure cylinder provided by the invention, the stepped inner wall design of the pressure cylinder is adopted, and precise three-position point fixing is achieved through auxiliary piston ring and step limiting.

Description

technical field [0001] The invention relates to the technical field of hydraulic and pneumatic transmission components, in particular to a piston-type three-position pressure cylinder. Background technique [0002] There are usually two types of pressure cylinders: pneumatic and hydraulic. It can convert the motion of the auxiliary piston ring into the linear reciprocating motion of the cylinder shaft. It is one of the commonly used actuators and is widely used in various actuators. [0003] With the development of the industry, the structure of the pressure cylinder is constantly changing in order to meet the needs of the industry. At present, the existing pressure cylinder can only achieve two extreme positions through the two sides (left and right sides of the cylinder) to enter the medium——left The limit position and the right limit position, in some devices that require three-position positioning, the two-position cylinder cannot meet the actual needs. Contents of the...

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Problems solved by technology

[0003] With the development of the industry, the structure of the pressure cylinder is constantly changing in order to meet the needs of the industry. At present, the existing pressure cylinder can only achieve two extreme positions through the two sides (left and right sides of the cylinder) to enter the medium——left Limit position and right limit position, in some devices that require three-position positioning, two-position cylinders cannot meet actual needs

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