| 摘要 |
PROBLEM TO BE SOLVED: To easily and accurately align a pair of brake disks with flange section when fastening them without increasing a weight of the brake disk in which heat dissipation rib is arranged. SOLUTION: A pair of brake disks 4 is easily and accurately aligned with a flange section 3 when fastening without increasing a weight of the brake disk 4 in such a way that a penetrating pin hole 3b is formed in the flange section 3 of a hub 2 to keep an engagement pin 9 projected to front/rear both sides of the flange section 3 and fitted loose through the pin hole 3b with a groove 9a engaging with a heat dissipation rib 8c radially extending to the pair of brake disks 4 arranged in both end faces of the engagement pin 9 projected to the front/rear both sides of this flange section 3. COPYRIGHT: (C)2009,JPO&INPIT
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