| 摘要 |
To provide a suspension arm of a vehicle that can be lighter in weight while the rigidity thereof is secured. A suspension arm of a vehicle includes: a pivot pipe swingably attached to a vehicle body frame; a pair of a front pipe and a rear pipe arranged side by side in a front-rear direction of a vehicle body, the pair of pipes having one end portions that are apart from each other in the front-rear direction of the vehicle body and connected to the pivot pipe, as well as having the other end portions that come closer to each other while extending toward an outer side of the vehicle body, so as to form a substantially triangular shape; and a joint attached to leading end portions, at the outer side of the vehicle body, of the pair of the front pipe and the rear pipe, and including a plate portion and a boss portion to which a knuckle is attached. The suspension arm further includes a substantially U shaped plate arranged at the other end portions of the pair of the front pipe and the rear pipe in a way to open toward the outer side of the vehicle body. In the suspension arm of a vehicle, the other end portions of the pair of the front pipe and the rear pipe are connected to an outer curved surface of the U shaped plate, and the plate portion of the joint is attached to the pair of the front pipe and the rear pipe in a way to cover the U shaped plate from above or below.
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