| 摘要 |
PROBLEM TO BE SOLVED: To provide an accumulator device for a hydraulically-operated impact device to suppress movement of the diaphragm of an accumulator. SOLUTION: This impact device comprises a percussion piston 2; a means to feed pressure fluid to the impact device and discharge it from the impact device; and an accumulator. According to the concept of this invention, the accumulator is formed as an annular structure to surround the percussion piston 2. The accumulator consists of sleeve-form pressure chambers (6b and the like) separated by a sleeve-form diaphragm 11 arranged between a frame 5 and a sleeve 9. Dents are formed in the inner periphery of the sleeve 9 arranged at the periphery of the frame and the outer periphery of the frame 5, and the pressure chambers (6b and the like) are formed such that the dents are positioned facing each other. |
