| 摘要 |
PROBLEM TO BE SOLVED: To prevent a crawler unit having a crawler belt wound on a drive sprocket, a tension turning wheel and a grounding turning wheel and provided with a crawler guide for preventing the crewler belt from coming-off from lowering its durability due to undue tension working on the crawler belt by the crawler guide when it is traveling on an uneven road. SOLUTION: With a crawler belt 3 wound on a drive sprocket 1 and a tension turning wheel 2, a stationary turning wheel 5 pivoted on a truck frame 4 and an oscillating turning wheel 7 pivoted on an oscillating link 6 pivoted on the truck frame 4 in an oscillating manner are provided on the ground side of the crawler belt 3 and crawler guides 8, 17 provided on the stationary turning wheel 5 side are made to follow the movement of the link 6 by having one end of each crawler guides 8, 17 pivoted on the trunk frame 4 and the other end pivoted on a link 9 protrusively provided to the upper part from the oscillating link 6.
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