| 摘要 |
<p>PROBLEM TO BE SOLVED: To smoothly manipulate a hydraulic construction machine, by transmitting rotation of the rotary member of the working side of the construction equipment and providing a transmission means to return a control valve corresponding to the rotary member to the neutral condition. SOLUTION: When a boom lever 35 of an operation device 11 is rotated anticlockwise, a boom lever pulley 38 is rotated. The rotation of the pulley 38 is transmitted through an operation side wire 41 to rotate the first valve and the boom control valve is driven to rotate the boom to the same direction with the lever 35. The movement of the boom is transmitted through the boom pulley and the operation side wire to rotate the second valve to the direction returning the boom control valve to the neutral condition. And further, when the lever 35 is continuously rotated, the boom is also rotated continuously. The arm and the bucket are operated in the same manner respectively by an arm lever and a bucket lever. In this way, the machine does not require skill and it is smoothly operated without skill.</p> |
