| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hydraulic driving device of a work machine, which enables drive adjustment of a plurality of hydraulic actuators to be appropriately performed by the adjustment of an unload circuit. <P>SOLUTION: The hydraulic driving device includes an unload circuit 103 for discharging pressure oil from a pressure oil supply path 26 for supplying pressure oil to the operation valve mechanisms 30 and 40 of a plurality of hydraulic actuators, and an operation valve 107 for adjusting the opening degree of the unload circuit 103. The hydraulic driving device further includes unload control means 150 for controlling the operation valve 107 based on detection information of operation detection means 151 and 152 and detection information of pump rotation detection means 153. The opening of the unload circuit 103 is adjusted according to the operation amounts of the operation valve mechanisms 30 and 40, the unload circuit 103 is adjusted to a small opening degree when the hydraulic pump is rotated at low speed, and the unload circuit 103 is adjusted to a large opening degree when the hydraulic pump is rotated at high speed. <P>COPYRIGHT: (C)2013,JPO&INPIT |
