| 摘要 |
PURPOSE:To make steering control go on smoothly, by using an inner shaft situated in the steering turnabout center for a piston rod of a hydraulic jacking mechanism. CONSTITUTION:Since an inner shaft 18 situated in the steering turnabout center is used for a piston rod of a hydraulic jacking mechanism 53, in time of a steering turnabout, such a problem that the hydraulic jacking mechanism 53 is distorted is solved whereby steering control becomes smoothed. In addition, the hydraulic jacking mechanism 53 using the inner shaft 18 installed inside a gear case 3 at the fixed side and a gear case 5 at the turnabout side is in no case projecting the operating parts of its own cylinder and piston from these gear cases 3 and 5. Therefore, such a dangerous state as colliding with something a projection on a ground surface can be brought to nothing. |
