| 摘要 |
PROBLEM TO BE SOLVED: To provide an automobile knuckle sound, considerably reducible in weight, and totally integrated regarding an integrated automobile knuckle having a cylindrical part with an axial hole, and a plurality of arms, at least one of which has a hollow part, projected around from the cylindrical part. SOLUTION: At least two hollow parts formed in arms communicate with each other in a cylindrical part, and/or the hollow parts at least partially pass through the cylindrical part and communicate with an axial hole. Further, the direction of a hollow part opening, shape in the vicinity of the hollow part opening, the wall thickness of the cylindrical part, and the wall thickness of a hollow part arm outer surface, are appropriately selected. A hollow ratio is thereby 15% or more, preferably 20% or more.
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