Direct drive braking system including an integrated package bearing
A wheel bearing hub and disc brake rotor assembly for use on vehicles includes a rotor ( 14 ) and a wheel mount ( 24 ), formed as a package bearing, fastened to the rotor with a connection assembly that promotes in plane torque transfer. The rotor has a flange form as a series of spaced tabs ( 20 ), and the wheel bearing hub ( 14 ) has a shoulder with complementary spaced tabs ( 34 ). The rotor is connected to the bearing hub by clamping a bridge ( 42 ) that spans the shoulder tabs over the rotor tabs. A spring clip ( 50 ) can be use with the bridge to accommodate thermal expansion of the rotor and eliminate rattling. Torque is transferred from the brake rotor to the bearing hub in a common plane to prevent twisting. In one embodiment, the bearing hub shoulder tabs may be formed by milling or machining slots. In another embodiment, the bearing hub shoulder tabs may be formed by fine-blanking or stamping slots.
1. A vehicle wheel hub and bearing assembly comprising:
a single disc brake rotor having a braking surface and an attachment flange, wherein the attachment flange has a plurality of rotor tabs;
a package wheel bearing hub having a wheel mounting flange and a disc brake rotor mounting flange with a surface for attachment to a disc brake rotor, wherein the disc brake rotor mounting flange has a shoulder with shoulder tabs for engagement with the rotor tabs, and the package wheel bearing hub and disc brake rotor mounting flange are integrally constructed as one piece; and
a fastener means for coupling the attachment flange of the disc brake rotor to the disc brake rotor mounting flange of the package wheel bearing hub to provide radial movement between the attachment flange and the disc brake rotor mounting flange to accommodate thermal expansion, wherein the fastener means includes a bridge for clamping and securing the rotor tabs between the shoulder tabs, and
wherein each radially oriented surface of the rotor tabs and shoulder tabs directly contact one another, and wherein the disc brake rotor mounting flange and the wheel mounting flange are substantially coplanar.
2. The assembly of claim 1 , further comprising a plurality of bridges, each having a pair of apertures that each receives a fastener.
3. The assembly of claim 1 , wherein the rotor tabs are solid.
4. The assembly of claim 1 , wherein at least some of the shoulder tabs have a through hole.
5. The assembly of claim 1 , wherein at least some of the shoulder tabs have a tapped hole.
6. The assembly of claim 1 , wherein the bridge is an annular ring.
7. The assembly of claim 1 , wherein the shoulder tabs define through slots between adjacent shoulder tabs.
8. The assembly of claim 1 , wherein the shoulder tabs define blank slots having a bottom wall between adjacent shoulder tabs.
9. The assembly of claim 1 , wherein the shoulder tabs are wider in the axial direction than the rotor tabs.
10. The assembly of claim 1 , wherein the fastener means includes a spring disposed between the bridge and an associated rotor tab of the single disc brake rotor to resiliently bias the rotor tab with respect to the bridge, wherein the spring is separate from the bridge.
11. The assembly of claim 10 , wherein the spring directly contacts the bridge.
12. The assembly of claim 1 , wherein the shoulder tabs of the disc brake rotor mounting flange define blank slots having a bottom wall between adjacent shoulder tabs and the bridge includes an annular ring that traps the rotor against the bottom wall between the adjacent shoulder tabs.
13. The assembly of claim 12 , wherein the fastener means includes a spring is separate from the annular ring.
14. A package wheel bearing hub for use in a vehicle wheel assembly that includes a brake rotor, comprising:
a wheel bearing hub;
a mounting portion supported by the wheel bearing hub for connection to a vehicle frame; and
a rotatable wheel mounting portion supported by the wheel bearing hub for rotation, wherein the wheel mounting portion includes a wheel mounting flange with a surface for attachment to the vehicle wheel and a disc brake rotor mounting flange for engagement with the brake rotor,
wherein the wheel bearing hub and the disc brake rotor mounting flange are integrally constructed as one piece and the disc brake rotor mounting flange has a shoulder with shoulder tabs formed therein defining a plurality of blank slots between adjacent shoulder tabs having a bottom wall configured to connect with the brake rotor,
a fastener means for coupling a plurality of rotor tabs of the disc brake rotor to the slots of the disc brake rotor mounting flange of the package wheel bearing hub to provide radial movement between the brake rotor tabs and the disc brake rotor mounting flange to accommodate thermal expansion, wherein the fastener means includes a bridge connected at opposite ends across a slot of the disc brake rotor mounting flange, and
wherein each radially oriented surface of the rotor tabs of the brake rotor and shoulder tabs of the disc brake rotor mounting flange directly contact one another, and wherein the disc brake rotor mounting flange and the wheel mounting flange are substantially coplanar.
15. The package wheel bearing hub of claim 14 , wherein each shoulder tab has a tapped hole.
16. The package wheel bearing hub of claim 14 , wherein the shoulder tabs are wider in the axial direction than the rotor tabs.
17. The package wheel bearing hub of claim 14 , wherein the fastener means includes a spring that is separate from the bridge.
18. The package wheel bearing hub of claim 17 , wherein the spring directly contacts the bridge.
19. The package wheel bearing hub of claim 14 , wherein said fastener means includes fasteners extending through the bridge and connected to shoulder tabs, and a spring disposed between said bridge and said one rotor tab of the brake rotor.
20. The package wheel bearing hub of claim 14 , wherein the shoulder tabs of the disc brake rotor mounting flange define the blank slots having the bottom wall between adjacent shoulder tabs and the bridge includes an annular ring that traps the rotor against the bottom wall between the adjacent shoulder tabs.
21. A vehicle wheel hub and bearing assembly comprising:
a single disc brake rotor having a braking surface and an attachment flange, wherein the attachment flange has a plurality of rotor tabs;
a mounting portion supported by the wheel bearing hub for connection to a vehicle frame;
a wheel bearing hub having a wheel mounting flange and a disc brake rotor mounting flange with a surface for attachment to a disc brake rotor, wherein the disc brake rotor mounting flange has a shoulder with shoulder tabs for engagement with the rotor tabs, and the wheel bearing hub and disc brake rotor mounting flange are integrally constructed as one piece; and
a fastener means for coupling the attachment flange of the disc brake rotor to the disc brake rotor mounting flange of the wheel bearing hub to provide radial movement between the attachment flange and the mounting flange to accommodate thermal expansion, wherein the fastener means includes a bridge and fastener, the fastener fastening the bridge to clamp over the rotor tabs and securing the rotor tabs between the shoulder tabs, and
wherein each radially oriented surface of the rotor tabs and shoulder tabs directly contact one another, and wherein the disc brake rotor mounting flange and the wheel mounting flange are substantially coplanar.