Boosting oil cylinder

Abstract

This invention discloses a force cylinder including a cylinder, first stage piston components 14, 1 moving to-and-fro and second stage piston components 3, 4 moving to-and-fro relatively to the first stage piston components, in which the first components include a first master oil cavity and a second master oil cavity, the second components include a first sub-cavity and a second sub-cavity connected with the two master cavities separately, rod 4 of the second components passes through piston 14 of the first, the first master cavity is connected with the first sub-cavity via an oil transportation channel set in the first piston components, the second master cavity is connected with the second sub-cavity via an oil transportation channel set in the second piston components.

Description

technical field [0001] The invention relates to a hydraulic device, in particular to a device for linear reciprocating movement of components pushed by fluid pressure. Background technique [0002] The structure of the hydraulic cylinder commonly used in the prior art is as follows: including a cylinder body, a reciprocating piston assembly is arranged in the cylinder body, including a piston rod and a piston fixedly installed on the piston rod, and the piston separates the cylinder body into front , the two rear chambers, when oil enters the rear chamber and oil exits the front chamber, the piston is pushed forward, thereby pushing the piston rod forward to output thrust; when the front chamber enters oil and the rear chamber exits oil, push The piston moves backward, thereby pushing the piston rod back into the rigid body. [0003] The problem with this structure is that the thrust output by the hydraulic cylinder is limited by the pressure of the hydraulic system. For ex...

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Problems solved by technology

[0003] The problem with this structure is that the thrust output by the hydraulic cylinder is limited by the pressure of the hydraulic system. For example, under the premise of a certain hydraulic system pressure, in order to increase the thrust output by the hydraulic cylinder, the working area of ​​the piston must be increased, that is, the piston must be increased. diameter, thereby increasing the structural size of the piston and cylinder, resulting in increased manufacturing costs, inconvenient use, and difficulties in transportation and construction; High oil pumps also lead to increased production costs. In addition, due to the use of high-pressure pumps, the pressure of the hydraulic system increases, causing the existing seals of the hydraulic cylinders to easily leak, so higher requirements are placed on the sealing structure.

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