Metal working – Method of mechanical manufacture – Repairing
Patent
1999-07-30
2000-09-12
Bryant, David P.
Metal working
Method of mechanical manufacture
Repairing
2940208, 294264, 294265, 29233, B23P 1904, B23P 2300, B23P 600
Patent
active
061159018
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND AND SUMMARY OF THE INVENTION
The invention relates to a process for breaking an unbroken brake disk of a disk brake in the mounted condition, to a process for exchanging a brake disk of a disk brake in the unbroken condition as well as to a breaking device for breaking an unbroken brake disk.
Nowadays, disk brakes are increasingly used particularly in the utility vehicle field, in which it is important to provide brakes for the highest loads. In the case of disk brakes, during a braking, an application force is transmitted by the lining carrier to the brake lining material fastened thereon. From the application force, the braking force is obtained between the lining material or brake lining and the brake disk. Concerning the different constructions of disk brakes, reference is made to the following literature:
Prof. Dr.-Ing. Buschmann, Prof. Dr.-Ing. Koessler "Manual of Automotive Engineering", Munchen 1976, Pages 844-847;
P. Gerigk, D. Bruhn, D. Danner, L. Endruschat, J. Gobert, H. Gross, D. Komoll "Automotive Engineering", Braunschweig 1994, Pages 425-427;
German Patent Application DE 42 30 005;
Repair Guideline RA-SB 0002, "Pneumatic Disk Brake SB6 . . . /SB7 . . . (Standard and Radial Brake)" Knorr Bremse, System fur Nutzfahrzeuge GmbH, 6, 1997.
The whole disclosure content of all these documents according to the prior art is incorporated herein by reference.
In addition to the brake linings, the brake disks are naturally also subjected to a certain wear, for example, as the result of abrasion or temperature fluctuations which may result in cracks in the brake disk. If such a wear is determined or the wear limit is reached, the brake disks must be exchanged.
If the brake disk is constructed in one piece as an unbroken disk, an exchange of such a disk, particularly in the case of a utility vehicle, requires high-cost dismounting work. For example, the complete hub must often be disassembled at high cost in order to be able to exchange the worn-out brake disk.
On the other hand, it is more expensive to originally equip utility vehicles with broken, that is, multipart brake disks.
It is therefore an object of the invention to provide a process and system by which the above-described disadvantages of the prior art can be overcome.
According to the invention, this problem is solved in that a process for breaking an unbroken brake disk of a disk brake in the mounted condition is provided which has the following steps: specifically such that which results in the breaking of the brake disk preferably with radially extending fracturing surfaces.
In a first embodiment of the process according to the invention, it is provided to construct the breaking device as a separate tool. This separate tool, away from the caliper of the disk brake, is set onto the brake disk itself.
In a particularly advantageous embodiment, it is provided that the breaking device comprises at least two breaking irons, the outer contour of the breaking irons being similar to brake linings so that they can be inserted into the lining shaft of the disk brake, preferably instead of the brake linings. In a further development of the invention, it is provided that the transverse forces according to the process of the invention are introduced directly by the brake pistons of the disk brake. In this case, the brake piston of the disk brake is advantageously operated pneumatically or hydraulically by the foot brake of the vehicle.
The above-described process concerning the breaking of an unbroken brake disk of a disk brake is preferably used when a brake disk of a disk brake is to be exchanged in the mounted condition. According to the invention, a process for exchanging a brake disk in the mounted condition is characterized in that the brake disk is first broken according to one of the above-mentioned processes by a breaking device, radially extending fracturing surfaces being formed in the process. The fragments of the brake disk resulting from the breakage are subsequently taken out of the caliper in the radial direction, a dismounti
REFERENCES:
patent: 3835522 (1974-09-01), Ward
patent: 4086828 (1978-05-01), Mader
Der sichere Weg zur Meisterprufung im Kfz-Handwerk, Pkw-Bremsen, Krad-Bremsen, Falf Leiter.
Der sichere Weg zur Meisterprufung im Kfz-Handwerk, Nutzfahrzeug-bremsen, Hans-Peter Klug.
Bieker Dieter
Werth Michael
Bryant David P.
Cozart Jermie E.
Knorr-Bremse Systeme Fur Nutzfahrzeuge GmbH
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