| 摘要 |
The crane is installed on a truck simply by bolts and nuts and requires small space for installation. The crane includes a frame(5), a main body(2) which is fixed at the frame(5), a control device(10) which is installed in the main body, a fixed body(20), a rotator valve(40), a rotary body(30), pistons(21,31), a cylinder(35), a chain(9) and a pilot valve(60). The chain(9) is controlled by a guide roller(24) and moves in high speed by a piston for the rapid operation of the crane. The control device(10) includes a hydraulic pump(11) and control valves connected to the hydraulic pump(11).
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