Patent ID: 8042880
Filing Date: 2011-10-25
Classification: B60B

Abstract:
1. An automobile wheel comprising: a wheel disk; and a substantially cylindrical wheel rim, in which the wheel disk includes: a substantially disk-shaped hub mounting portion that is connected to a hub of an axle; a hat portion that bulges outward from the hub mounting portion toward a surface side direction; and a disk flange that extends from an outer circumferential edge of the hat portion toward a back side direction, and the wheel disk is engaged with an inner circumferential surface of the wheel rim to join the wheel disk and the wheel rim together, wherein the hat portion comprises: an inward angled circumferential portion that has a substantially S-shape cross section comprising: a hat top circumferential portion that is formed continuously with an outer circumferential edge of the inward recessed circumferential portion of the inward angled circumferential portion and that protrudes toward the surface side direction in a curved shape; and an outward angled circumferential portion that includes an outward recessed circumferential portion that is formed continuously with an outer circumferential edge of the hat top circumferential portion and that is recessed toward the back side in a curved shape; wherein the inward angled circumferential portion, the hat top circumferential portion, and the outward angled circumferential portion being arranged concentrically, in which on a vertical cross section that includes a central axis of the wheel disk, when an imaginary inward angle (α) is formed between an imaginary inward angled line L and an imaginary bottom line M, and an imaginary outward angle (β) is formed between an imaginary outward angled line N and the imaginary bottom line M, where the imaginary inward angled line L is tangential to an inner circumferential surface of the hub surface rounded portion and to an inner circumferential surface of the inward recessed circumferential portion of the inward angled circumferential portion, the imaginary bottom line M extends outward along a back side surface of the hub mounting portion, and the imaginary outward angled line N is tangential to an inner circumferential surface of the outward recessed circumferential portion of the outward angled circumferential portion and runs through an intersection point G of the imaginary bottom line M and an inner circumferential surface of the disk flange, the imaginary inward angle (α) and the imaginary outward angle (β) satisfy an equation: and when a radial deviation distance (t) is defined between an imaginary intersection point P and a top point O of the hat top circumferential portion, where the imaginary intersection point P is defined by the imaginary inward angled line L and the imaginary outward angled line N, the deviation distance (t) satisfies an equation: