Patent ID: 9616725
Date: 2017-04-11
CPC Classifications: B60G

Claim:
1. A suspension arm member comprising: a connecting portion configured to connect a plurality of members of a suspension mounted on a vehicle; and a support bar provided with the connecting portion at each end and extending in a longitudinal direction, wherein the support bar is made of a resin material and comprises a plurality of lightening hole portions each formed in a shape of a recessed portion in a direction orthogonal to the longitudinal direction, and wherein the lightening hole portions comprise: a plurality of front upper lightening hole portions formed in the longitudinal direction in a front upper portion of the support bar, a plurality of front lower lightening hole portions formed in the longitudinal direction in a front lower portion of the support bar and staggered in a top-to-bottom direction with respect to the front upper lightening hole portions, a plurality of rear upper lightening hole portions formed in the longitudinal direction in a rear upper portion of the support bar and staggered in a front-to-rear direction with respect to the front upper lightening hole positions, a plurality of rear lower lightening hole portions formed in the longitudinal direction in a rear lower portion of the support bar and staggered with respect to the rear upper lightening hole portions and the front lower lightening hole portions, and wherein parts of the support bar in which the lightening hole portions are formed in an S-shape or in an inverted S-shape, as seen in a cross-sectional view in a widthwise direction.