| 摘要 |
PROBLEM TO BE SOLVED: To make strength and rigidity enhance around the bead seat part provided on the side distant from a disc part. SOLUTION: This wheel is constituted of a circular plate-shaped disc part 2 and an annular rim part 1, these members 1, 2 are both formed of an aluminum alloy. A bead seat part 11 is formed on the end part side which is not on the side continued to the disc part 2 of the annular rim part 1, in a part in its vicinity, a well part 12 having a recessed form in cross section is provided to continue to the bead seat part 11. In this way, a value of section modulus around the bead seat part 11 not on the side continued to the disc part 2 is increased, so that strength and rigidity around the concerned bead seat part 11 and in the total unit of the wheel can be enhanced.
|
