To provide a cast swing arm of which a weight is saved while having a degree of freedom of appearance thereof.SOLUTION: A cast swing arm comprises: a pivot part (31); left and right arm parts (32, 33) extending backward from the pivot part (31); and a cross member (34) which connects the left and right arm parts (32, 33). The left and right arm parts (32, 33) comprise: cross parts (32B, 33B) which are connected to the cross member (34); front arm parts (32A, 33A) which extend forward from the cross parts (32B, 33B); and rear arm parts (32C, 33C) which extend backward. In the rear arm parts (32C, 33C), inward recesses (43, 44) which open to a width direction inner side are formed and outward recesses (41A, 42A) which open to a width direction outer side are formed in the cross parts (32B, 33B).SELECTED DRAWING: Figure 2

    【課題】外観自由度を持たせつつ、軽量化された鋳造スイングアームを提供する。【解決手段】ピボット部(31)と、ピボット部(31)から後方に延びる左右のアーム部(32、33)と、左右のアーム部(32、33)を接続するクロスメンバ(34)と、を備える鋳造スイングアームであって、左右のアーム部(32、33)は、クロスメンバ(34)に接続されるクロス部(32B、33B)と、クロス部(32B、33B)から前方に延びる前アーム部(32A、33A)と、後方に延びる後アーム部(32C、33C)からなり、後アーム部(32C、33C)には、幅方向内側に開放する内向き凹部(43、44)が形成されるとともに、クロス部(32B、33B)には、幅方向外側に開放する外向き凹部(41A、42A)が形成される。【選択図】図2


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    Title :

    CAST SWING ARM


    Additional title:

    鋳造スイングアーム



    Publication date :

    2020-08-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62K Fahrräder , CYCLES



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