Motor vehicle brake disc

Patent metadata

Field	Value
Publication number	US-9249848-B2
Application number	US-201414256274-A
Country	US
Kind code	B2
Filing date	Apr 18, 2014
Priority date	Oct 21, 2011
Publication date	Feb 2, 2016
Grant date	Feb 2, 2016

Abstract

A brake disk for a disk brake includes a brake disk chamber and a friction ring fastened thereto. By way of particularly six to twelve centering and/or fastening extensions directed inward from an inner diameter of the friction ring, the friction ring is placed in the axial direction on the face side on centering attachments of the brake disk chamber, and is fixed on the brake disk chamber by way of fastening devices, particularly screws and/or rivets that extend in the axial direction. The centering attachments of the brake disk chamber are recesses in the brake disk chamber edge or in the brake disk chamber edge and in the brake disk chamber jacket, one centering and/or fastening extension of the friction ring respectively projecting into them.

First claim

What is claimed is:

1. A brake disc for a disc brake, the brake disc comprising:
a friction ring having six to twelve centering and fastening extensions extending from an inner diameter thereof radially inward;
a brake disc chamber comprising a brake disc chamber jacket having a brake disc chamber edge at a face side thereof, wherein the brake disc chamber further comprises centering attachments formed as recesses in the chamber edge or in the chamber edge and the chamber jacket, the centering and fastening extensions of the friction ring respectively projecting into the recesses of the brake disc chamber when the friction ring is placed in an axial direction on the face side of the brake disc chamber; and
a fastening ring mounted at the brake disc chamber edge so as to cover the recesses of the brake disc chamber in which the centering and fastening extensions of the friction ring project, wherein
the fastening ring fixes the centering and fastening extensions of the friction ring against axial float at the brake disc chamber in the axial direction, and
the recesses in the brake disc chamber have a depth in the axial direction that is less than the depth of the centering and fastening extensions, whereby the fastening ring obtains a wavy form after mounting.

2. The brake disc according to claim 1 , wherein the centering and fastening extensions of the friction ring and the recesses of the brake disc chamber are configured to provide a clearance fit in a circumferential direction.

3. The brake disc according to claim 1 , wherein the recesses in the brake disc chamber are 0.1 to 0.8 millimeters less deep than the depth of the centering and fastening extensions.

4. The brake disc according to claim 1 , wherein the brake disc chamber extends essentially in one direction from a side of the friction ring.

5. The brake disc according to claim 1 , wherein the friction ring comprises two friction discs having cooling-air ducts arranged between the two friction discs and connecting the two friction discs, and
wherein the centering and fastening extensions are arranged on only one of the two friction discs.

6. The brake disc according to claim 5 , wherein the centering and fastening extensions are arranged on the one friction disc that faces the brake disc chamber when the friction ring is mounted on the brake disc chamber.

7. The brake disc according to claim 1 , wherein the brake disc chamber further comprises a chamber disc configured to reinforce the brake disc chamber jacket, the chamber disc being arranged at an end of the brake disc chamber jacket facing away from the friction ring and extending in a radial direction.

8. The brake disc according to claim 1 , wherein the brake disc chamber is composed of a light alloy.

9. The brake disc according to claim 8 , wherein the friction ring is composed of gray cast iron.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Kokott Kordian

Classifications

• F16D65/128

  characterised by means for cooling · CPC title

• F16D2065/1316

  radially segmented · CPC title

• F16D2200/003

  Light metals, e.g. aluminium · CPC title

• F16D2065/136

  with relative movement radially · CPC title

• F16D65/123 Primary

  comprising an annular disc secured to a hub member; Discs characterised by means for mounting · CPC title