a hydraulic cylinder

Abstract

The invention relates to a hydraulic cylinder. The hydraulic cylinder comprises a cylinder seat, an outer cylinder body, an inner cylinder body, a piston rod, a piston and a cylinder head, wherein the cylinder seat is fixedly connected with an external mounting seat, one end of the outer cylinder is fixedly connected with the cylinder seat and is provided with a rod cavity oil port, the other end of the outer cylinder is provided with a rodless cavity oil port, and the contact surface of the inner wall of the outer cylinder and the cylinder seat is sealed. The inner cylinder is hollow inside, one end of the inner cylinder is fixedly connected with the cylinder seat, the inner cylinder is penetratingly arranged in the outer cylinder, the cylinder head is arranged between the inner cylinder and the outer cylinder and fixed at the other end of the outer cylinder, and the contact surface of the cylinder head and the inner wall of the outer cylinder is sealed. The piston rod is sleeved with the inner cylinder, the contact surfaces of the piston rod and the inner wall of the inner cylinder as well as the cylinder head are sealed, the piston is fixed at the end of the piston rod, and the contact surface of the piston and the inner wall of the outer cylinder is sealed. The hydraulic cylinder can apply axial force on a spindle or parts of the spindle when the spindle of a mechanical device moves.

Description

technical field [0001] The invention relates to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder. Background technique [0002] In the prior art, mechanical equipment such as coilers, static pressure pile machines, and squeeze-and-expand cast-in-situ pile drilling rigs for steel rolling production lines all need to apply an axial force to the main shaft or the components on the main shaft when the main shaft is moving, but the traditional hydraulic pressure Cylinders generally only have a piston rod that withstands internal pressure and a solid piston rod. There is no space for installing transmission shafts and other parts inside the piston rod. Therefore, traditional hydraulic cylinders cannot meet the requirements of the working conditions. If other equipment is used instead, the overall structure of the equipment will be compared. complex. Contents of the invention [0003] The embodiment of the present application provides a hydraulic...

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Problems solved by technology

[0003] The embodiment of the present application provides a hydraulic cylinder, which solves the problem that there is no space for installing transmission shafts and other parts inside the piston rod of the traditional hydraulic cylinder in the prior art, which cannot meet the needs of coilers, static pile machines, extrusion and expansion for steel rolling production lines. The problem of the working conditions of cast-in-place pile drilling rigs and other mechanical equipment enables the hydraulic cylinder to exert an axial force on the main shaft or the components on the main shaft when the main shaft of the above-mentioned mechanical equipment is moving.

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