Hub and rotor assembly

A disc brake rotor and hub assembly for a heavy-duty vehicle, the disc brake rotor and hub assembly comprising:

• a hub, the hub receivable on and rotatable about an axle spindle of a heavy-duty vehicle;
• a rotor, the rotor including a disc segment, a mounting segment and a substantially cylindrical sleeve segment connecting the disc segment and the mounting segment;
• and
• a flange connectable with the rotor and separately connectable with the hub, whereby the rotor and hub are free of contact with each other to provide a conductive heat path to dissipate heat before reaching lubricant within the hub during heavy-duty vehicle braking.

A disc brake rotor and hub assembly for a heavy-duty vehicle having an axle spindle, the disc brake rotor and hub assembly comprising:

• a hub portion receivable on and rotatable about the axle spindle, the hub portion having a substantially cylindrical body and a mounting section integrally formed with the body and extending radially outward from the cylindrical body;
• a rotor portion including a disc segment, a mounting segment and a substantially cylindrical sleeve segment connecting the disc segment to the mounting segment, wherein a smallest inner dimension of the rotor portion is greater than a largest outer dimension of the hub defining a clearance passage therebetween;
• a cavity at least partially defined by the cylindrical sleeve segment of the rotor portion and the axle spindle, the cavity being in fluid communication with the clearance passage;
• a flange portion having a main central section and a radially outward extending attachment section, the main central section of the flange portion being connectable with the mounting section of the hub portion, the attachment section of the flange portion being connectable with the mounting segment of the rotor portion;
• and
• a radially extending passage formed between the mounting section of the hub portion and the main central section of the flange portion;
• and
• an axially extending passage formed between a radially outward surface of the hub portion and a radially inward surface of the flange portion;
• wherein fluid may flow from the axially extending passage to the radially extending passage to the clearance passage and to the cavity.

A disc brake rotor and hub assembly for a heavy-duty vehicle having an axle spindle, the disc brake rotor and hub assembly comprising:

• a hub portion receivable on and rotatable about the axle spindle, the hub portion having a substantially cylindrical body and a mounting section integrally formed with the body and extending radially outward from the cylindrical body;
• a rotor portion including a disc segment, a mounting segment and a substantially cylindrical sleeve segment connecting the disc segment to the mounting segment;
• a flange portion having a main central section and a radially outward extending attachment section, the main central section of the flange portion being connectable with the mounting section of the hub portion, the attachment section of the flange portion being connectable with the mounting segment of the rotor portion;
• and
• a radially extending passage formed between the mounting section of the hub portion and the main central section of the flange portion;
• and
• an axially extending passage formed between a radially outward surface of the hub portion and a radially inward surface of the flange portion;
• wherein the axially extending passage and the radially extending passage define a space of noncontact between the flange portion to the hub portion to minimize heat conduction from the flange portion to the hub portion.

A disc brake rotor and hub assembly for a heavy-duty vehicle, the disc brake rotor and hub assembly comprising:

• a hub portion, the hub portion receivable on and rotatable about an axle spindle of a heavy-duty vehicle;
• a rotor portion, the rotor portion including a disc segment, a mounting segment and a substantially cylindrical sleeve segment connecting the disc segment and the mounting segment;
• a flange portion connectable with the rotor portion and separately with the hub portion;
• a plurality of wheel studs extending through openings in the mounting segment of the rotor portion and through openings in the flange portion, each of the wheel studs having a knurl portion extending through and engaging surfaces of the openings in the mounting segment of the rotor portion and the openings in the flange portion, wherein the diameter of the openings in the mounting segment of the rotor portion is greater than the diameter of the openings in the flange portion;
• and
• wherein a smallest inner dimension of the rotor portion is greater than a largest outer dimension of the hub portion to facilitate removal of the rotor portion without removing the hub from the axle spindle.

A disc brake rotor and hub assembly for a heavy-duty vehicle, the disc brake rotor and hub assembly comprising:

• a hub portion, the hub portion receivable on and rotatable about an axle spindle of a heavy-duty vehicle;
• a rotor portion, the rotor portion including a disc segment, a mounting segment and a substantially cylindrical sleeve segment connecting the disc segment and the mounting segment;
• a flange portion connectable with the rotor portion and separately connectable with the hub portion, whereby the rotor portion and hub portion are free of contact with each other;
• an inboard disc and an outboard disc formed in the disc segment of the rotor portion and spaced apart and interconnected by a plurality of pins defining radially extending passages, and further including surface means defining an axially extending passage formed at an interface of the outboard disc and sleeve segment of the rotor portion, wherein fluid may flow from the axially extending passage to the radially extending passages;
• and
• wherein heat from the disc segment of the rotor portion is conducted from the disc segment, to the sleeve segment, to the mounting segment, to the flange portion and then to the hub portion.

A disc brake rotor and hub assembly for a heavy-duty vehicle having an axle spindle, the disc brake rotor and hub assembly comprising:

• a hub portion, the hub portion receivable on and rotatable about the axle spindle, the hub portion having a substantially cylindrical body and a mounting section extending radially outward from the body;
• a rotor portion connectable with the hub portion, the rotor portion including a disc segment, a substantially cylindrical sleeve segment and a mounting segment extending radially inward from the sleeve segment, the sleeve segment connecting the disc segment and the mounting segment;
• the mounting segment of the rotor portion being attachable with the mounting section of the hub portion at a location axially outboard of the mounting section of the hub portion;
• an inboard disc and an outboard disc formed in the disc segment of the rotor portion and spaced apart and interconnected by a plurality of pins defining radially extending passages, and further including surface means defining an axially extending passage formed at an interface of the outboard disc and sleeve segment of the rotor portion, wherein fluid may flow from the axially extending passage to the radially extending passages, and wherein the axially extending passage also reduces stress at the interface of the outboard disc and sleeve segment of the rotor portion;
• and
• wherein the rotor portion is removable without removing the hub portion from the axle spindle.