| 摘要 |
The present invention is to prevent the diameter of a flange of a hydraulic cylinder from being expanded by cushion pressure caused when a piston moves to a stroke end position. According to an embodiment of the present invention, the hydraulic cylinder comprises a tube for forming the accommodation space of working fluid; the flange extended from the end of the tube; a cylinder rod linearly moving in the tube according to the inflow and discharge of the working fluid; the piston coupled to the cylinder rod, and dividing the tube into a large chamber and a small chamber; a head cover installed on the outer surface of the flange; a cushion sleeve for preventing the piston from colliding with the head cover when the piston moves to the stroke end position; a coupling hole circumferentially formed on the flange; and a strength reinforcing pin formed corresponding to the coupling hole to be coupled to the coupling hole, and preventing the diameter of the flange from being radially expanded by the cushion pressure caused in a pressure chamber between the head cover and the piston when the piston moves to the stroke end position. |
