| 摘要 |
A reduced-weight disc brake for motor cycles comprises a braking band in the form of a circular ring which is provided with tabs spaced uniformly on the inner side of the band, for releasable fixing to a support bell, and with a plurality of axial weight-reducing and cooling holes, and which is further provided with a plurality of millings produced by a disc-type milling cutter with an axis parallel to the axis of the circular ring and formed alternately in the inner wall and in the peripheral wall of the band, with the dual advantage of further reducing the weight of the band and of forming, with at least some of the plurality of axial holes, ventilation ducts which, together with the increase in the dissipating surface area and with the turbulence induced by the discontinuities of the inner and peripheral walls, also increase cooling efficiency.
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