| 摘要 |
PROBLEM TO BE SOLVED: To improve the vibrating characteristic of a tire wheel and satisfactorily reduce the interior noise in a wheel constituting the wheel of a motor vehicle in cooperation with a tire by imparting the tire wheel a natural frequency different from that of a vibration transmission system for transmitting vibration to the wheel in the motor vehicle. SOLUTION: In this wheel, curvature radiuses are imparted to each surface of a disc part 10 and a rim part 12. Namely, curvature radius imparting parts 50, 52 are formed on the inside surface and outside surface of the disc part 10 to impart the curvature radiuses so that each circumferential part of the disc part 10 is curved facing to the outside of the body. On the other hand, curvature radius imparting parts 54, 57 formed on the inside surface and outside surface of the rim part 12 impart curvature radiuses so that each circumferential part of the rim part 12 is curved facing toward the rotating center of the wheel. According to this, the primary natural frequency of the wheel can be differed from that of the vibration transmission system, or each primary natural frequency of the tire, suspension, drive shaft, and engine.
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