| 摘要 |
<p>The present invention relates to a hydraulic cylinder applied to an actuator and the like. The hydraulic cylinder includes a piston prepared to be able to slide against the internal circumferential surface of a cylinder tube, and including a first piston, a second piston, and a third piston which are sequentially combined to one end of a cylinder rod, wherein the circumferential surfaces of the first piston and the third piston are spaced apart from the internal circumferential surface of the cylinder rod. The hydraulic cylinder further includes one pair of piston seals symmetrically interposed between the second and first pistons and between the second and third pistons, one pair of taper rings fitted to the external circumferential surfaces of the first and third pistons to pressurize axially extended portions of the one pair of piston seals in an inclined direction toward the internal circumferential surface of the cylinder tube, and one pair of snap rings fitted in respective grooves formed on the outer circumferential surfaces of the first and third pistons to support the one pair of the taper rings respectively in the axial direction.</p> |
