| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure for fitting and fixing a rotor 10 in a flange part 9 formed on an outer peripheral face of a hub 3 to prevent the occurrence of play in a fitting part irrespective of change of temperature. SOLUTION: An inside diameter face of the rotor 10 is externally fitted in an outside diameter face of the flange part 9 by tightening and fitting it to connect the rotor with the hub 3 and fix it to the hub 3. Coefficients of linear expansion of metallic materials constituting the rotor 10 and the hub 3 agree substantially. Change of tightening allowance of the fitting part is reduced irrespective of large change of temperature due to the use to prevent the reduction of support strength of the fitting part. As a result, it is possible to prevent the vibration of the rotor 10 when braking.
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