| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent difficulty in increasing a boom driving speed in the simultaneously conducting driving of a boom and turning a body in a hydraulic circuit of a conventional excavating turning work machine. <P>SOLUTION: Hydraulic oil is fed to a boom cylinder CY1, an arm cylinder CY2, a bucket cylinder CY3, and a turning motor M by a first, a second, and a third hydraulic pump P1, P2, and P3 for conducting the driving of the boom 1, driving of an arm 2, driving of a bucket 3, and turning of the body in this hydraulic circuit for an excavating turning work machine. When simultaneously conducting the lifting action of the boom 1 and turning action of the body 4, the boom 1 is driven by the first and the second hydraulic pumps P1 and P2, and the body 4 is turned by the third hydraulic pump P3. <P>COPYRIGHT: (C)2004,JPO</p> |
