Kobe Steel, Ltd.

Keiji Yazaki

Hiroaki Hosoi

Kouki Sugino

Teppei Hoshino

The objective of the present invention is to improve the rigidity of a vehicle knuckle made from an aluminum alloy with respect to a force directed from the outside to the inside in the width direction of a vehicle. A vehicle knuckle () is provided with a bearing support portion (), a knuckle upper portion () and a knuckle lower portion (). With the vehicle knuckle () in a position fitted to a vehicle main body, the knuckle upper portion () has a shape in which, if the knuckle upper portion () is divided equally into five or more regions in a vertical direction, and the center of the bearing support portion () is fixed and a horizontal load F is applied to a knuckle upper end portion () from the outside toward the inside in the width direction of the vehicle, the minimum value of a value obtained by dividing the strain energy in each of the five or more regions other than a first region (A) by the mass of the corresponding region is at least equal to 0.70 times the maximum value thereof.

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Inabe, Japan

Keiji Yazaki