Honda Motor Co., Ltd.

Hirokuni Fuchigami

Masashi Furuya

Masaaki Nishi

Hisashi Ishimatsu

Akihiko Mizumoto

An object of the present invention is to provide a reinforcing structure of a suspension arm, in which high rigidity capable of withstanding any input from a road surface or the like can be given to the suspension arm. In a vehicle suspension including a plurality of suspension arms, one ends of which being connected to a vehicle body of a vehicle and the other ends of which being connected to a knuckle, a control arm includes a main body and a pair of attachment portions provided at both ends of the main body. Each of the pair of attachment portions is provided with a substantially cylindrical through-hole for connection to the vehicle body or the knuckle. At least one of the pair of attachment portions is provided with an annular reinforcing member for reinforcing around the through-hole.

Reinforcing structure of suspension arm and method of manufacturing the same

A steel wire for a spring, in which the sag resistance and the fatigue characteristics are improved by production processes without addition of alloy elements, is provided. The spring has a structure obtained by quenching and tempering and includes a first layer at a surface thereof, a second layer interior to the first layer, and a third layer, which is interior to the second layer and reaches a center of the spring, and the second layer has lower hardness than the first and the third layers.

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Saitama, Japan

Hirokuni Fuchigami