| 摘要 |
PROBLEM TO BE SOLVED: To provide a semi-crawler allowing a sprocket of a semi-crawler drive device to be mounted directly to a drive shaft of the rear wheel of a tractor.SOLUTION: A semi-crawler 20 includes a sprocket 2 having teeth along the circumferential direction, an outside frame 7 and an inside frame 8 rockably mounted on the right and left connection frames mounted on the vehicle body of a farm tractor, an idle ring 9 and a lower rolling ring 11, and a guide ring 10 rotatably mounted on the outside frame 7, and on the inside frame 8, respectively, and a rubber crawler 1 extending along the outer periphery of the sprocket 2 and the outer peripheries of the idle ring 9, the lower rolling ring 11 and the guide ring 10. The rotational axis of the sprocket 2 is matched to the rotational axis of the rear wheel of the farm tractor, and the pitch circle diameter of the sprocket 2 is equal to the twice of the static load radius of the rear wheel of the farm tractor. |
