| 摘要 |
PROBLEM TO BE SOLVED: To provide a rear arm for a motorcycle, which realizes more weight reduction and higher stiffness and reducing manufacturing cost. SOLUTION: This rear arm for the motorcycle 15 is constructed by welding right and left arm molded bodies 2, 3 made of aluminum alloy die-cast, formed by horizontally dividing pivot sections 2b, 3b and cross members 2c, 3c with regard to the center line of a vehicle body, at the pivot sections and the cross members. A right and a left arms 2a, 3a are roughly triangular when viewed from the side and are of roughly U-shape opening inwardly in the cross direction when viewed from the cross section. The cross members 2c, 3c are of closed cross-section shape ranging from summits 2g, 3g of the triangular shape to its bottoms respectively. COPYRIGHT: (C)2004,JPO
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