| 摘要 |
PURPOSE:To improve the following performance against the coarse face of the travelling ground by journaling a rotary wheel torsibly against a shaft. CONSTITUTION:A crawler will travel while grounding a grounding side 2 against the travel face, but since a rotary wheel 4 is journaled torsibly around a spherical member 5, when the grounding side 2 will step partially on an inclined face section or a coarse face section to incline against a shaft 3, the rotary wheel 4 will also incline against the shaft 3 around the spherical member 5, and guide an endless rail belt 1 while rotating under said inclined state. Consequently the gap will scarcely produced between the endless rail belt 1 and the rotary wheel 4, thereby the endless rail belt 1 will scarcely get out of when inclining against the rotary wheel 4. |
