Sealing parts are also an essential component, including O-rings, Y-rings, etc. They are installed at the joints between the cylinder barrel and the piston, the piston rod and other parts, effectively preventing hydraulic oil leakage and ensuring the tightness and efficient operation of the system. In addition, there is a guide sleeve, which guides the movement direction of the piston rod to maintain its straightness and reduce eccentric wear. The buffer device can slow down the impact at the end of the piston stroke, reduce noise and vibration, and extend the service life of the equipment. These key components cooperate with each other to form a hydraulic cylinder with reliable performance and powerful functions, which is widely used in many fields such as engineering machinery and automation equipment, providing strong support for the development of modern industry.