| 摘要 |
PURPOSE:To expand/contract the inter-caterpillar distance freely by fitting an axle movably in axial direction into the axle inserting section of crawler frame. CONSTITUTION:Box-shaped axle inserting sections 11, 31 having rectangular cross-section are provided axially at the opposite sides in front and rear of crawler frame 3 and car body 1, while an axle having box structure of rectangular cross-section corresponding with said axle inserting sections 11, 31 is inserted across both sections 11, 31 while slidably in axial direction against said sections 11, 31. Inter-caterpillar distance can be expanded/contracted freely through axial motion of axle 2 against the car body 1 and axial motion of crawler frame 3 against the axle 2. |
