| 摘要 |
PROBLEM TO BE SOLVED: To provide a disc rotor fastening structure for preventing the side runout of a rotor during fastening a disc wheel without increasing its weight and cost. SOLUTION: The disc rotor fastening structure is adopted to a vehicular disc brake device, wherein a disc rotor in the state of being held between the disc wheel and a flange portion of a hub is fastened to the hub flange portion together with the disc wheel by a fastening means. On the outside end face of the disc rotor or on the inside end face of the disc wheel, an annular step is provided so that it is recessed at its outer diameter side and protruded at its inner diameter side. In this design, a value for the outer diameter of a contact face between the disc wheel and the disc rotor exists in a preset range from a value for the outer diameter of a contact face between the disc rotor and the hub flange portion. Preferably, the preset range includes zero. COPYRIGHT: (C)2006,JPO&NCIPI
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