| 摘要 |
PROBLEM TO BE SOLVED: To provide a link for rotary bush type crawler whose strength is enhanced rationally by link functionality sharing and by the combination thereof for further improvement in a rotatable bushing function. SOLUTION: A track link 2 is formed by combining an outer link 4 with an inner link 3. The thickness dimension T of a bush hole of the inner link 3 is formed to be greater than the thickness dimension t of a connecting pin hole of the outer link 4. A boss 36 having a part raised gently from the vicinity of a tread toward the periphery of the bush hole 34 is provided on an outer peripheral surface of the inner link 3. A concave curve surface 45a corresponding to the outer shape of the boss 36 is formed at the periphery of a connecting pin hole 43 on an inner side surface of the outer link 4. COPYRIGHT: (C)2009,JPO&INPIT
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