Air -cooled brake disc

The utility model provides an air -cooled brake disc belongs to vehicle braking device's technical field, which comprises a disc body. Boss, inner ring district and outer loop district has set gradually from inside to outside on the disk body upper surface, the boss sets up in the center of disk body upper surface department, be provided with the exhaust hole of running through the disk body in the inner ring district, be provided with protrusion in outside with turbine blade of the interior turbine blade of disk body in the outer loop district, synthetic wind channel is enclosed to set up relative with outer turbine blade of interior turbine blade. During the car brakeing, the brake block of brake disc both sides is exerted pressure to the brake disc to produce the friction to the brake disc, heat that the friction produced rotates the air current that causes and passes the exhaust hole through the wind channel and discharge along with the brake disc, interior turbine blade and outerturbine blade's the setti