Composite disc rotor

A composite disc rotor comprising:

• a disc main body, having a ring shape, having a pair of friction surfaces which are opposite each other in an axial direction of the disc main body and to which pads are pushed upon braking, including a plurality of coupling portions at a plurality of circumferential positions of the disc main body, each of the coupling portions being disposed inner side in a radial direction of the disc main body and being formed with a coupling through hole;
• a coupling bracket, having a plurality of notches which are opened in an outer peripheral edge of the coupling bracket and disposed at the plurality of circumferential positions;
• and
• a plurality of coupling units, disposed at the plurality of circumferential positions, and each of which includes a bobbin including a head part and a pipe part, a clip and a coupling bolt, wherein
• the head part includes a torque receiving portion inserted in each of the notches and a projection projected in a circumferential direction of the disc main body from an end of the torque receiving portion in the axial direction, the pipe part is extended from the head part and is fitted in the coupling through hole,
• each of the bobbins is formed with a through hole penetrating the head part and the pipe part,
• each of the clip includes a connecting portion between the torque receiving portion and a inner surface of each of the notches and a pressing portion extended from the connecting portion in the circumferential direction between the head part and the coupling bracket, and
• each of the coupling bolts is inserted into each of the through holes of the bobbins to fix the coupling bracket to the coupling unit, so that a torque applied to the friction surfaces is transmitted to the coupling bracket via the bobbin.