| 摘要 |
PURPOSE: An arm mounting structure improves the stiffness of a frame by forming a mounter when fixing a lower arm to the frame. CONSTITUTION: An arm mounting structure comprises a through hole(1) and a mounting device. The mounting device formed for improving the stiffness of a frame is composed of a hemi-spherical case(2), a spherical arm(3), a rubber bush(4) and a cover(6). The hemi-spherical case(2) is mounted in a frame(F) for supporting the frame(F) vertically. The spherical arm(3) is mounted in the hemi-spherical case(2) for supporting the rotatory motion of a lower arm(52). Thus, the stiffness of the frame(F) is increased by the hemi-spherical case(2) supporting the frame(F) and the spherical arm(3) supporting the rotatory motion of the lower arm(52).
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