| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a hydraulic striking device that can stabilize striking performance.SOLUTION: In the hydraulic striking device, a change-over valve mechanism 210 includes: valve energization means for constantly energizing a valve 300 in a direction; and valve regulating means for moving the valve 300 in an opposite direction while resisting energization force of the valve energization means during hydraulic oil supply. An accumulator 400 is provided between a channel for supplying hydraulic oil to the valve regulating means and the valve energization means and a channel for supplying hydraulic oil to a piston rear chamber 111.</p> |
