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A two-piece floating disc brake assembly comprises a hub with a plurality of radially extending drive cogs that engage a corresponding plurality of teeth that extend radially inwardly from the disc brake rotor. The disc is retained to the rotor by a plurality of retainers that are bolted to the axia

A two-piece floating disc brake assembly comprises a hub with a plurality of radially extending drive cogs that engage a corresponding plurality of teeth that extend radially inwardly from the disc brake rotor. The disc is retained to the rotor by a plurality of retainers that are bolted to the axially outward surface of the brake rotor to engage the axially outward surfaces of the drive cogs. Axially float of the brake disc relative to the brake hub is provided by a plurality of axially slots between the drive cogs that are deeper than the thickness of the drive cogs. Because the axial clearance is established by the depth of the radial slots alone, tolerance on axially float is easier to maintain and is independent of the thickness of the brake disc.

대표청구항 ▼

What is claimed is: 1. A disc brake assembly for mounting on a vehicle comprising: a hub, said hub comprising a mounting flange and an axially extending outer wall, said hub further comprising a plurality of drive cogs extending radially outward from said axially extending outer wall, each of said

What is claimed is: 1. A disc brake assembly for mounting on a vehicle comprising: a hub, said hub comprising a mounting flange and an axially extending outer wall, said hub further comprising a plurality of drive cogs extending radially outward from said axially extending outer wall, each of said plurality of drive cogs having an axial thickness defined by an axially inward facing surface and an axially outward facing surface, each of said drive cogs further comprising a circumferentially forward facing surface and a circumferentially rearward facing surface, said circumferentially forward facing surface and said circumferentially rearward facing surface of adjacent drive cogs of said plurality of drive cogs defining a radial slot therebetween, wherein said circumferentially forward facing surfaces and adjacent circumferentially rearward facing surfaces of said plurality of drive cogs collectively define a plurality of radial slots, said hub further comprising a plurality of axial slots formed in said outer wall intersecting said radial slots, said axial slots having an axial depth greater than said axial thickness of said plurality of drive cogs; a brake rotor, said brake rotor comprising a disc member having an axially outward surface and an axially inward surface, said brake rotor further comprising a plurality of teeth extending radially inward from said disc member, said plurality of teeth sized to correspond to said plurality of radial slots for engaging said plurality of drive cogs, each of said plurality of teeth further comprising an axially inward facing surface and an axially outward facing surface; and an axially outward retainer rigidly attached to said axially outward facing surface of at least one of said plurality of teeth, said axially outward retainer extending in a circumferential direction beyond said at least one of said plurality of teeth to engage said axially outward facing surface of at least one of said plurality of drive cogs, said axially inward facing surface of said brake rotor having no contact with said hub, said brake rotor being retained from moving axially inward beyond a predetermined distance solely by said axially outward retainer, said predetermined distance being independent of the axial thickness of the brake rotor. 2. The disc brake assembly of claim 1, wherein: said axially outward retainer comprises an arcuate member attached to plural of said plurality of teeth. 3. The disc brake assembly of claim 1, further comprising: a plurality of axially outward retainers, each of said plurality of axially outward retainers attached to at least one of said plurality of teeth. 4. The disc brake assembly of claim 1, wherein: said axially outward retainer comprises a ring shaped member attached to said plurality of teeth. 5. The disc brake assembly of claim 1, wherein: said flange of said hub comprises a substantially disk shaped member; and said axially extending outer wall of said hub comprises a hollow substantially cylindrical body extending axially inward from said mounting flange. 6. The disc brake assembly of claim 1, wherein: the axial depth of said plurality of axial slots exceeds the axial thickness of said plurality of drive cogs by at least 0.001 inch. 7. The disc brake assembly of claim 1, wherein: the axial depth of said plurality of axial slots exceeds the axial thickness of said plurality of drive cogs by from 0.001 inch to 0.010 inch. 8. The disc brake assembly of claim 1, wherein; said circumferentially forward facing surface and a circumferentially rearward facing surface are parallel. 9. A disc brake assembly for mounting on a vehicle comprising: a hub comprising a plurality of radially outwardly extending drive cogs said plurality of drive cogs defining a plurality of radial slots therebetween, each of said plurality of drive cogs having a front surface, a rear surface and an axial thickness, the axial thickness of each of said plurality of drive cogs being substantially equal, said hub further comprising a plurality of axial slots, each of said plurality of axial slots intersecting one of said plurality of radial slots, said axial slots having a radial depth that is less than the radial depth of said radial slots, said axial slots further comprising a bottom surface and an axial depth that is greater than said axial thickness of said plurality of drive cogs, said axial depth of said axial slot defining a gap for providing end-float for a brake rotor, said gap being equal to the extent to which the axial depth of said plurality of axial slots exceeds the axial thickness of said plurality of drive cogs; a brake rotor, said brake rotor comprising a disc member having a plurality of teeth extending radially inward from said disc member, said plurality of teeth engaging said plurality of drive cogs along the front and rear surfaces defining the radial slots, each of said teeth further comprising an axially inward facing surface and an axially outward facing surface; and axially outward retaining means, said axially outward retaining means being attached to said axially outward facing surface of at least one of said plurality of teeth, said axially outward retaining means comprising an axially inward facing surface capable of bearing against said front surface of at least one of said plurality of drive cogs, said brake rotor being prevented from moving axially outward beyond a limit as said axially outward facing surface of at least one of said plurality of teeth bears against a corresponding bottom surface of one of said plurality of axial slots, said brake rotor further being prevented from moving axially inward beyond a predetermined distance solely by the said axially outward retaining means, said predetermined distance being equal to said gap. 10. The disc brake assembly of claim 9, wherein: the axial depth of said plurality of axial slots exceeds the axial thickness of said plurality of drive cogs by at least 0.001 inch. 11. The disc brake assembly of claim 9, wherein: the axial depth of said plurality of axial slots exceeds the axial thickness of said plurality of drive cogs by from 0.001 inch to 0.010 inch. 12. A disc brake assembly for mounting on a vehicle comprising: a hub, said hub comprising an axially extending outer wall, said hub further comprising a plurality of drive cogs extending radially outward from said outer wall, said plurality of drive cogs having an axially outward facing surface defining a first bearing surface, said plurality of drive cogs further defining a plurality of radial slots therebetween, said axially extending outer wall further comprising a plurality of axial slots, each of said plurality of axial slots intersecting one of said plurality of radial slots, each of said plurality of axial slots further having a bottom surface displaced axially outward from said first bearing surface to define a gap for providing end-float for a brake rotor said gap being equal to the axial displacement of said bottom surface from said first bearing surface; a brake rotor, said brake rotor comprising a disc member having an axially inward facing surface and an axially outward facing surface, said brake rotor further comprising a plurality of teeth extending radially inward from said disc member to intersect said plurality of axial slots, said plurality of teeth further having circumferential widths sized to correspond to said plurality of radial slots for engaging said plurality of drive cogs, each of said teeth further comprising an axially inward facing surface and an axially outward facing surface; and axially outward retaining means, said axially outward retaining means comprising a flange extending in a circumferential direction from said axially outward facing surface of at least one of said plurality of teeth, said flange further comprising an inward facing surface capable of bearing against said first bearing surface to retain said disc to said hub, said axially inward facing surface of said brake rotor having no contact with said drive cogs, said brake rotor being prevented from moving axially inward beyond the distance of said gap solely by said axially outward retaining means. 13. The disc brake assembly of claim 12, wherein: said axially outward retaining means comprises a plurality of arcuate members each attached to plural of said plurality of teeth. 14. The disc brake assembly of claim 12, further comprising: said axially outward retaining means comprises a plurality of arcuate members having a flat axially inward facing surface. 15. The disc brake assembly of claim 12, wherein: said axially outward retaining means comprises a ring shaped member attached to said plurality of teeth. 16. The disc brake assembly of claim 12, wherein: said gap is from 0.001 to 0.010 inch. 17. A disc brake assembly for mounting on a vehicle comprising: a hub comprising a plurality of radially outwardly extending drive cogs, said plurality of drive cogs each having an axially outward facing surface defining a first bearing surface, said plurality of drive cogs further defining a plurality of radial slots therebetween, each of said radial slots intersecting an axial slot having an axially inward facing bottom surface defining a second bearing surface; a brake rotor, said brake rotor comprising a disc member having an axially inward facing surface and an axially outward facing surface, said brake rotor further comprising a plurality of teeth extending radially inward and having circumferential widths sized to correspond to said plurality of radial slots for engaging said plurality of drive cogs, each of said plurality of teeth having an axially outward facing surface; and axially outward retaining means, said axially outward retaining means comprising a flange extending circumferentially outward from said axially outward facing surface of at least one of said plurality of teeth, said flange having an axially inward facing surface capable of bearing against said first bearing surface of said plurality of drive cogs, said brake rotor being moveable axially from a first position in which said inward facing surface of said axially outward retaining means is spaced apart from said first bearing surface of said plurality of drive cogs to a second position in which said inward facing surface of said axially outward retaining means contacts said first bearing surface of said plurality of drive cogs, said axially inward facing surface of said brake rotor having no contact with said drive cogs, said brake rotor being prevented from moving axially inward beyond a predetermined distance solely by said axially outward retaining means engaging said first bearing surface, said predetermined distance being independent of the axial thickness of the brake rotor. 18. The disc brake assembly of claim 17, wherein: said axially outward facing surfaces of said plurality of teeth contact said axially inward facing bottom surfaces of said axial slots when said brake rotor is in said first position. 19. The disc brake assembly of claim 18, wherein: said predetermined axial clearance is no more than 0.010 inch.