| 摘要 |
PURPOSE: A hydraulic cylinder is provided to cut down expenses, and to minimize impact in decelerating and stopping by buffering impact from a hydraulic piston without step in reciprocating. CONSTITUTION: A hydraulic cylinder(1) for buffering without step is composed of a tube(2) forming a body; a rod cover(10) inserted to the opening of the tube; a head cover(12); a hydraulic piston(3) reciprocating between covers; and a piston rod(5) combined with the piston. The piston is reciprocated with difference between an inlet and an outlet of the hydraulic cylinder, and inserted to combination holes(14,16) of the rod cover and the head cover. Operating oil is moved to forward and backward ports(20,22) with the piston, and forward and backward cushion parts(7,9) are formed to reduce an oil passage(11). Expenses are reduced with forming cushion parts, and impact is minimized in decelerating and stopping.
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