| 摘要 |
PROBLEM TO BE SOLVED: To prevent a hub diameter from being increased accompanied by mounting a pulsar ring and improve the flexibility in disposing a wheel speed sensor in a motorcycle. SOLUTION: A groove part 30c is formed in a circular ring-like on the side surface of a circular ring-like rear brake disc 30 and a stepped circular ring-like pulsar ring 32 is mounted on the side surface of the rear brake disc 30 so that the pulsar part 32b is positioned at the groove part 30c. It is not necessary to allow for space storing the pulsar ring 32 at the inner periphery of the rear brake disc 30 thereby, and a small hub engaging hole 30b of the rear brake disc 30 can be enough. Since the pulsar part 32b of the pulsar ring 32 is positioned at the groove part 30c of the rear brake disc 30, it is not bulky to the axle direction. Moreover, since the pulsar ring 32 is positioned between the rear brake disc 30 and a final gear case 40, the appearance becomes excellent. Since the wheel speed sensor 33 is hidden in the inner side of a swing arm, the appearance becomes excellent. COPYRIGHT: (C)2006,JPO&NCIPI
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