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    Bicycle crank assembly
    1.
    发明授权
    Bicycle crank assembly 有权
    自行车曲柄组合

    公开(公告)号：US07258041B2

    公开(公告)日：2007-08-21

    申请号：US10773243

    申请日：2004-02-09

    申请人： Masahiro Yamanaka ,  Yoko Terasawa ,  Sota Hamada ,  Takahiro Nakano ,  Yoshiyuki Yoshida ,  Takashi Ishihara ,  Toshiaki Tatsumi

    发明人： Masahiro Yamanaka ,  Yoko Terasawa ,  Sota Hamada ,  Takahiro Nakano ,  Yoshiyuki Yoshida ,  Takashi Ishihara ,  Toshiaki Tatsumi

    IPC分类号： G05G1/14

    CPC分类号： B62M3/003 ,  Y10T74/2165

    摘要： A bicycle crank assembly has a right crank crimp-fastened to a crank shaft in such a manner that the external appearance is attractive. The crank shaft has a first and second portions with the second portion being positioned on the right side of the first portion and having a larger diameter than the first portion. The right crank has a sprocket mounting part, a right crank arm part, and an engagement bore formed in the center of the sprocket mounting part. The right crank is crimp-fastened to the crank shaft by installing the second portion of the crank shaft into the engagement bore and pressing the periphery of the engagement bore toward the outside in the axial direction of the crank shaft such that the pressed portion bulges radially inward and an annular space is formed between the crank shaft and the engagement bore.

    摘要翻译： 自行车曲柄组件具有以外观吸引人的方式卷曲地紧固到曲轴上的右曲柄。 曲柄轴具有第一和第二部分，第二部分位于第一部分的右侧并具有比第一部分更大的直径。 右曲柄具有链轮安装部，右曲柄臂部和形成在链轮安装部的中心的接合孔。 通过将曲轴的第二部分安装到接合孔中并将曲柄的周边沿着曲柄轴的轴线方向向外侧按压，使得压紧部分径向地凸出，将右曲柄卷曲紧固到曲轴上 向内，并且在曲轴和接合孔之间形成环形空间。