Separable brake rotor

摘要

A disc brake system includes a hub having a plurality of extensions and a multi-portion rotor which can be separated without disturbing the hub, bearing or other axle assemblies. The extensions engage the brake rotor assembly to transfer braking torque between the rotor assembly and the hub. Each extension is received between abutments which extend from an inner surface of the brake rotor portions opposite the engagement surface which contacts a brake pad. Threaded fasteners and hollow concentric bushings are mounted transverse the parting line to mount the brake rotor portions together. Another disc brake assembly includes four extensions arranged in a cruciform pattern about the hub. An offset parting line allows for an angled approach of the joint between the assembled rotor portions as it rotates into brake pads to provide less wear from any potential joint mismatch. A clearance is defined between the assembled rotor disc and the hub to reduce the tendency of the rotor to twist under load and because of the lack of requirement for a pilot, reduces the heat transfer to the hub bearings and improves air flow to the rotor.