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Hydraulic cylinder is generally composed of cylinder cylinder, piston rod, cylinder head, piston, seal and other parts.

The most basic five parts of hydraulic cylinder: cylinder and cylinder head, piston and piston rod, sealing device, buffer device, exhaust device.

The cylinder TUBE consists of four parts: cylinder block, flange, cylinder bottom and liner. ROD is composed of three parts: 1. ROD body 2. Earrings 3. The inner part of the cylinder is divided into two parts by the piston, the large cavity and the small cavity. Large cavity refers to the inner cavity of the cylinder body after the piston rod is fully extended; Small cavity refers to the piston rod fully extended into the cylinder body and the rod body cavity; Due to the high viscosity of the hydraulic oil, the compression ratio is very small, when the bottom of the cylinder oil into the oil, the piston will be pushed to make the cylinder head oil out of the oil, piston drive piston rod to do stretching or retraction movement, and vice versa.