| 摘要 |
PROBLEM TO BE SOLVED: To change an attenuation force which is generated accompanied by the movement of a piston in both directions by a simple constitution.SOLUTION: A hydraulic buffer comprises: a cylinder 11; a piston part 30 which is movably provided in a cylinder shaft direction, and partitions the inside of the cylinder into a first oil chamber Y1 and a second oil chamber Y2; an outside piston part 31 fixed to a rod part; an inside piston part 32 which is provided so as to be relatively movable with respect to the outside piston part 31; a first flow passage which forms a flow passage from the first oil chamber Y1 to the second oil chamber Y2 which is formed by the movement of the piston part 30; a second flow passage which forms a flow passage from the second oil chamber Y2 to the first oil chamber Y1 which is formed accompanied by the movement of the piston part 30; a pressure-side valve part 33 which is fixed to the inside piston part 32, contacts with the outside piston part 31, and controls a flow of oil in the first flow passage; and an elongation-side valve part 35 which is fixed to the outside piston part 31, contacts with the inside piston part 32, and controls a flow of oil in the second flow passage.SELECTED DRAWING: Figure 2 |
