A piston-type single-acting buffer hydraulic cylinder is composed of a cylinder tube with an oil inlet at the bottom, a guide sleeve with a sealing ring closing the upper port of the cylinder tube, a sealing ring installed in the cylinder tube and connecting the two chambers The piston is composed of a plurality of oil-filling holes and a piston rod connected to the piston and sliding along the guide sleeve. The feature is that the piston rod in the cylinder has a plurality of buffer oils leading to the rodless cavity at the other end of the piston The oil filling hole of the piston is provided with a one-way valve to prevent the pressure oil in the rod cavity from flowing to the rodless cavity, and a throttle hole communicating with the oil filling hole is also opened on the cylinder surface of the piston.
The piston-type single-acting buffer buffer hydraulic cylinder is characterized in that the piston rod near the end of the stroke is provided with several radial buffer oil holes with different diameters, and a central hole is opened at the bottom of the piston rod to connect each buffer oil hole with the rodless cavity , Install a check valve to prevent the oil from flowing to the rodless cavity on the oil filling hole of the piston, so that the rod cavity becomes a buffer cavity, which effectively reduces the peak buffer pressure and slows the impact on the guide sleeve seal. The reliability of the buffer hydraulic cylinder is improved; in addition, it has the advantages of compact structure, easy processing and low cost.