| 摘要 |
PURPOSE: A lower arm of a vehicle is provided to improve lateral stiffness by increasing a gap between a body mounting-bush and a geometry bush, improving impact-absorbing force by weakening hardness of the body mounting-bush and the geometry bush, and to secure stability in traveling by making a caster angle controlled. CONSTITUTION: A lower arm of a vehicle comprises an arm shaft(31) forming threaded portions(31a) to the outer peripheral surface; a front arm(33) with one end combined with non-threaded portions(31b) of the arm shaft spaced apart to one side of a first combining body(41), through a second combining body(43), and with the other end combined to a body frame through a body mounting-bush(11); and a rear arm(35) with one end combined to the non-threaded portion of the arm shaft space apart to the other side of the first combining body, and with the other end combined to the body frame through a geometry bush(12). The arm shaft is ball-jointed with a knuckle(52) of a wheel(51) though the first combining body engaged with the threaded portion. A gap between the body mounting-bush and the geometry bush is sharply increased and thus, lateral stiffness of the lower arm is improved.
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