| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a hydraulic pump control device of work machine in which poor lubrication at sliding surfaces of a control plate or wear caused by contamination can be restricted during attachment work performed under control of an axial piston pump to a specified discharging amount, thereby a damage of the axial piston pump caused by these wears can be avoided in advance.SOLUTION: Under a work mode in which a hydraulic breaker 7 requiring supply of hydraulic fluid of specified flow rate is used, hydraulic fluid from a first hydraulic pump 17 in addition to hydraulic fluid from a second hydraulic pump 18 are also supplied to the hydraulic breaker 7 in response to a changing-over of a direction changing-over valve 26 for attachment. At this time, a pump cooperative control is executed, and the discharging amounts of the first and second hydraulic pumps 17, 18 are alternatively increased or decreased between 0 and a required supply amount of the hydraulic breaker 7. With this arrangement above, wear of the control plate is prevented by changing inclination angles of both hydraulic pumps 17, 18 while supplying work fluid of specified flow rate to the hydraulic breaker 7.</p> |
