| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic circuit which can secure an amount of pressure oil necessary for right and left side motors for travelling so as to make limitation of travelling speed suppressed and is compact in a simple structure. SOLUTION: A first system 13 has a selector valve 24 of a motor for right side travelling and a selector valve for a first actuator, and a second system 14 has a selector valve 25 of a motor for left side travelling and a selector valve for a second actuator. The selector valves 24 and 25 of motors for travelling at right and left sides and selector valves for the first and second actuators are connected with each other in tandem. A combining valve 15 provides a combining position 15b which interconnects first and second supply passages 22 and 23 and blocks supply passages 20 and 21 for travelling at right and left sides, a combining position 15c which interconnects the first and second supply passages 22 and 23 and interconnects the supply passages 20 and 21 for travelling at right and left sides, and a combining position 15c which blocks the first and second supply passages 22 and 23 and blocks the supply passages 20 and 21 for travelling at right and left sides. COPYRIGHT: (C)2007,JPO&INPIT
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