| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a hydraulic driving device capable of suppressing vibration of piston occurring at the time of stop of a hydraulic cylinder, and capable of improving stop performance.SOLUTION: A hydraulic driving device includes a controller 16 that, in the case where an operation command for stopping a piston 7d of a boom cylinder 7a from being telescopically driven is input by an operation lever device 11, controls a pressure control device 40 to stop circulation of working fluid with respect to at least one of a bottom chamber 7e and a rod chamber 7f of the boom cylinder 7a, then controls pressure of at least the other of the bottom chamber 7e and the rod chamber 7f, and then makes load difference acting from both of the bottom chamber 7e and the rod chamber 7f to the piston 7d small.</p> |
