Metal working – Method of mechanical manufacture – Assembling or joining
Reexamination Certificate
1999-08-20
2001-06-19
Echols, P. W. (Department: 3726)
Metal working
Method of mechanical manufacture
Assembling or joining
C029S898090, C082S001110, C082S112000
Reexamination Certificate
active
06247219
ABSTRACT:
BACKGROUND OF THE INVENTION
The subject invention relates to in general to vehicle brakes and, more specifically, to a method for producing a vehicle hub, bearing and brake disc assembly used in such a vehicle brake system.
With the advent of front wheel drive vehicles and disc brakes, the assembly which is driven by the drive shaft comprises a vehicle hub presenting a hub flange supporting a brake disc having opposed brake surfaces and with a bearing assembly surrounding the vehicle hub with an outer race presenting a bearing flange for attachment to a steering knuckle of a vehicle. When fully assembled on the vehicle, the brake surfaces of the disc rotor are disposed adjacent a pair of brake pads of a disc brake assembly and separated from engagement therewith by a normal brake running clearance when the disc brake assembly is not actuated. When the disc brake assembly is actuated, the brake pads take up the clearance and engage the brake surfaces of the brake disc.
In order to provide the normal brake running clearance, the brake disc must be manufactured to close tolerances with the brake surfaces oriented in a perpendicularly relationship relative to the axis of the brake disc and in parallel relationship relative to one another. A method of machining to close tolerances on a brake disc which is mounted through a bearing on a fixed stub shaft is disclosed in U.S. Pat. No. 5,430,926, to Dean J. Hartford. Normally, however, in a front drive or driven wheel a bearing assembly is disposed about the vehicle hub, rather than in the vehicle hub as in the aforementioned patent, and after the brake surfaces have been machined. As the assembly is mounted to the vehicle, the bearing assembly is loaded to finalize the relationship or orientation between the brake surfaces and the axis of rotation and can result in misalignment of the brake surfaces.
SUMMARY OF THE INVENTION
This invention relates to method for fabricating a vehicle hub, bearing and brake disc assembly wherein the brake surface of the brake disc is oriented in a predetermined relationship relative to the outer race of the bearing assembly. The method comprises the steps of: (a) providing a vehicle hub including a hub flange; (b) providing a bearing assembly having an outer race; (c) installing the bearing assembly about the vehicle hub; (d) providing a separately formed brake disc having a brake surface; (e) securing the brake disc to the hub flange of the vehicle hub to produce a vehicle hub, bearing and brake disc assembly; (f) supporting the vehicle hub, bearing and brake disc assembly on a machining apparatus; and (g) using the machining apparatus to machine the brake surface of the brake disc of the vehicle hub, bearing and brake disc assembly whereby the brake surface is oriented in a predetermined relationship relative to the outer race of the bearing assembly. As a result of producing the vehicle hub, bearing and brake disc assembly in this manner, tighter tolerances are maintained in the brake surfaces of the brake disc.
Other advantages of this invention will become apparent to those skilled in the art from the following detailed description of the preferred embodiments, when read in light of the accompanying drawings.
REFERENCES:
patent: 1917748 (1933-07-01), Blazek
patent: 3540165 (1970-11-01), Lanham
patent: 3555940 (1971-01-01), Cooper
patent: 3665657 (1972-05-01), Lill
patent: 3757883 (1973-09-01), Asberg
patent: 4042422 (1977-08-01), Asberg
patent: 4262452 (1981-04-01), Lopez
patent: 4478116 (1984-10-01), Fuller
patent: 4874064 (1989-10-01), Oono
patent: 5430926 (1995-07-01), Hartford
patent: 5653153 (1997-08-01), Greenwald
patent: 1477382 (1969-10-01), None
patent: 122143 (1984-10-01), None
Austin Vince J.
Kochan Glenn
Rapisardi Raymond C.
Echols P. W.
Kelsey-Hayes Company
MacMillan Sobanski & Todd LLC
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