| 摘要 |
PROBLEM TO BE SOLVED: To partially make large an axial width of individual pin boss parts 23, 31 to which a large load is applied while inhibiting the whole axial width of the pin bosses 23, 31 of two links 11, 13 and to effectively enhance strength of a bearing part. SOLUTION: The pin connection structure has a connection pin 12 axially inserted through a first pin boss part 21 of an upper link 11 and a second pin boss part 31 of a lower link 13. A relative rotation angle of both links 11, 13 is restricted to a predetermined angle or less. Each of the pin boss parts 21, 31 partially has wide width parts 23, 33 of long axial width. These wide width parts 23, 33 are axially and partially overlapped. COPYRIGHT: (C)2004,JPO
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