Hydraulic multi-stage cylinder capable of working in two directions

Abstract

The hydraulic multi-stage cylinder comprises a cylinder body, a first oil injection cavity is formed in the cylinder body, a first piston rod is installed in the first oil injection cavity in a sliding mode, a second oil injection cavity is formed in the first piston rod, and a second piston rod is installed in the second oil injection cavity in a sliding mode. The first piston rod is driven to move leftwards or rightwards in the cylinder body for bidirectional work of the hydraulic cylinder, then the second piston rod is controlled to slide in the first piston rod, the length of the device is reduced, meanwhile, a longer stroke can be achieved, the requirement for the short installation distance can be met, and the service life of the device is prolonged. The installation position of the device can be adjusted by moving the installation block along the track of the limiting rod, rotating the installation block on the outer side of the limiting rod, controlling the relative angle between the installation block and the fixing block and enabling the fixing bolt to correspond to the bolt hole in the installation position, and installation of the device is facilitated.

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