Patent ID: 8414002

Claim:
A vehicular L-shape suspension arm in which a wheel support part (AW) that is capable of supporting a wheel is provided on one end part of an arm main body (A) that is L-shaped in plan view, a first vehicle body side linking portion (AF 1 ) that is capable of being swingably linked to a vehicle body (F) via a first bush (B 1 ) arranged with an axis thereof lying in a fore-and-aft direction of the vehicle body is provided in an intermediate part of the arm main body (A), and a second vehicle body side linking portion (AF 2 ) that is capable of being swingably linked to the vehicle body (F) via a second bush (B 2 ) arranged with an axis thereof lying in an up-and-down direction is provided on the other end part of the arm main body (A), the first vehicle body side linking portion (AF 1 ) and the second vehicle body side linking portion (AF 2 ) being disposed on the front side and the rear side respectively in the vehicle body fore-and-aft direction, characterized in that the arm main body (A) comprises an upper half body (AU) formed with an inverted U-shaped cross-section by press forming a plate material while having an upper wall part ( 1 ) and a pair of side wall parts ( 2 ) extending downward from opposite sides of the upper wall part ( 1 ), and a lower half body (AL) secured to the upper half body (AU) so as to block a lower open end thereof, the first vehicle body side linking portion (AF 1 ) comprises front and rear support plates (SF, SR) that are each formed by press forming a plate material and are arranged in the vehicle body fore-and-aft direction, the front and rear support plates (SF, SR) have base parts (SFa, SRa) thereof integrally joined to each other, base ends thereof are each welded to an outside part of the arm main body (A), extremity parts (SFb, SRb) of the front and rear support plates (SF, SR) are arranged so as to be spaced from each other in the vehicle body fore-and-aft direction, and the extremity parts (SFb, SRb) each have a cylindrical bush support part (P 1 ) formed integrally therewith on the same axis by burring, the bush support part (P 1 ) being capable of fitting onto and supporting an outer tubular part of the first bush (B 1 ).