| 摘要 |
PROBLEM TO BE SOLVED: To excellently stabilize the seal performance for a long time. SOLUTION: In a crawler belt, an inside link part 19 of one track link is fixed to both ends of a cylindrical bush 23, and a connecting shaft 24 is inserted into the bush 23 freely to be turned, and an outside link part 20 of the other track link is fixed to both ends of the connecting shaft 24. In this crawler belt, a seal 32 formed of a first annular seal body 32 having an M-shaped cross section, a second annular seal body 34 provided between a second annular side piece part 30 forming the first annular seal body 32 and an end surface of the bush 23 and forming a relative sliding seal surface, and a third annular seal body 35 is provided in an annular space formed between a recessed part 26 of the outside link part 20 of each track link and the bush 23.
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