| 摘要 |
PURPOSE: A backup tractor is provided to reduce the manufacturing cost since a working tool is loaded in a process a cylinder rod is drawn and thus the number of or the size of hydraulic cylinders is minimized. CONSTITUTION: A backup tractor(100) comprises a driving arm and a hydraulic cylinder(130). One side of the driving arm is rotatably installed on the body of a vehicle, on which a working tool is loaded. A connecting part, which is connected to the working tool, is formed on the other side of the driving arm. The cylinder body is rotatably connected to the driving arm. The hydraulic cylinder drives the driving arm so that the piston rod is hinge-connected to the vehicle body to load the working tool on the vehicle body. A hydraulic supply unit drives the hydraulic cylinder. The driving arm comprises first and second rotating rods(111,112), which are arranged at an interval. |
