| 摘要 |
PURPOSE:To prevent a caterpillar belt from being detached from a wheel unit, by providing a shaft, placed in parallel with the running direction, and a rotary unit, turnably supported around this shaft, in the caterpillar belt. CONSTITUTION:A pair of fixing members 11 of doglegged section are mounted by a bolt 12 to the external surface of a connection part 2 of a chassis 1, and a frame 14 of a caterpillar type running structure 13 is respectively fixed by a bolt 15a to this fixing member 11 through a supporting member 15. A rotary shaft 16 is rotatably supported between the frames 14 respectively to the front and rear end. A pair of right and left sprockets 17 are secured to a rotary shaft 16, and a caterpillar belt 18 is wound on a pair of longitudinal sprockets. The caterpillar belt 18 is constituted of a pair of right and left chains 22, frame member supported to each chain piece and three rotary units 26 rotatably supported between both side plates of said frame member placing the axis in parallel with the chain. |
