| 摘要 |
PROBLEM TO BE SOLVED: To provide a disc brake device equipped with a divided type brake disc, which is simple in structure, capable of reducing the weight, high in alignment precision, capable of absorbing the thermal expansion of a disc, and saving on the cooling structure. SOLUTION: Each divided disc 3a is formed so as to be connected integrally by butt jointing via a knock pin 4 at the divided face, and a ring-shaped flange 5 is protruded integrally at the outside circumference of a boss 2. At the side of the boss 2, a circular hole 7 is set, and a centering pin 6 is fitted with clearance. The brake disc is brought into contact with the flange 5, and at this time, a rectangular pin part 6b of the centering pin 6 at the flange 5 side is fitted into a plurality of engaging grooves 9 which extend in the radial direction.
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