| 摘要 |
PROBLEM TO BE SOLVED: To prevent or suppress abrasion of a cylinder and a cylinder liner in an integral-type hydraulic breaker in which a front head part and a cylinder part have an integral structure.SOLUTION: A hydraulic breaker 10 comprises a cylinder 1 in which a front head part 41, to which a chisel 12 is attached by insertion thereof from a tip side of the front head part itself, and a cylinder part 42, into which a piston 5 is slidably fitted via a cylinder liner 23, have an integral structure. A washer 22 made from a steel of a low hardness, which is a steel type different from that of the cylinder 1 and the cylinder liner 23, is inserted between surfaces of the cylinder 1 and the cylinder liner 23, which face each other in an axial direction CL, in a front part of the cylinder liner 23. |
