| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a hydraulic circuit capable of improving work efficiency by efficiently making pressure oil from the third pump join when three direction selector valves of a director selector valve for a boom, a director selector valve for a bucket and a direction selector valve for an arm can be simultaneously operated. <P>SOLUTION: In the hydraulic circuit 1, the first throttle 34 is formed by incorporating it into the first confluent valve 30, the second throttle 35 is provided between a branch position 37 and the direction selector valve 23 for the bucket in the first confluent passage 31, the third throttle 36 is provided to the third confluent passage 33, the distribution of a supply amount of pressure oil to each of the three direction selector valves can be optimized in the case the three direction selector valves of the direction selector valve 22 for the boom, the direction selector valve 23 for the bucket and the direction selector valve 27 for the arm are simultaneously operated by providing these throttles and, at the same time, the distribution of a supply amount of pressure oil to both direction selector valves can be also optimized in the case the direction selector valve 22 for the boom and the direction selector valve 23 for the bucket are simultaneously operated. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
