| 摘要 |
A floating type disc brake “A” used for a vehicle such as a motorcycle comprising a braking rotor 1A and a hub 2A arranged inside the braking rotor 1A, the braking rotor 1A including an annular rotor portion 11 and a plurality of projections 13A extending radially inward from the inner circumferential portion of the rotor portion 11, and further comprising a connecting means 3 for connecting the braking rotor 1A and the hub 2A at positions in which the projections 13A of the braking rotor 1A are abutted to the outer circumferential portion of the hub 2A. At least one of the rotor portion 11 and the projections 13A is formed with cutout portions 13b at the boundary region between the rotor portion 11 and the projections 13A. It is possible to suppress a local heat dissipation in regions of the rotor portion 11 in which the projections 13A are formed and thus to reduce irregularity of heat distribution in the rotor portion 11 during braking operations.
|
