Patent ID: 8251386
Filing Date: 2012-08-28
Classification: B60G

Abstract:
1. A suspension arm for a vehicle in which an arm main body formed by press forming a metal plate comprises a knuckle mounting portion on which a knuckle is mounted, a first vehicle body mounting portion that is provided inwardly of the knuckle mounting portion in a vehicle width direction and is mounted on a vehicle body, and a second vehicle body mounting portion that is provided toward a vehicle body rear side of the first vehicle body mounting portion and is mounted on the vehicle body, the suspension arm comprising: a first upper wall portion that extends substantially horizontally from the first vehicle body mounting portion to the second vehicle body mounting portion in a state in which the arm main body is mounted on the vehicle body; a second upper wall portion that extends substantially horizontally from the second vehicle body mounting portion to the knuckle mounting portion in a state in which the arm main body is mounted on the vehicle body; a third upper wall portion that extends substantially horizontally from the knuckle mounting portion to the first vehicle body mounting portion in a state in which the arm main body is mounted on the vehicle body; a first bottom wall portion that is at a position lower than the first and second upper wall portions and connects the first and second upper wall portions; a second bottom wall portion that is at a position lower than the second and third upper wall portions and connects the second and third upper wall portions, a first inclined projecting portion that is formed so as to bulge upward in an end part on the first vehicle body mounting portion side of the first bottom wall portion and has a height that gradually decreases in going from the first upper wall portion toward the second upper wall portion; and a second inclined projecting portion that is formed so as to bulge upward in an end part on the first vehicle body mounting portion side of the second bottom wall portion and has a height that gradually decreases in going from the third upper wall portion toward the second upper wall portion.