# US 2009/0260933 A1 · Brake disc

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- Number: US 2009/0260933 A1
- Document ID: US20090260933A1
- Status: Published application
- Kind: A1
- Application number: 12/250,293
- Filed: 2008-10-13
- Published: 2009-10-22
- Earliest claimed: 2006-04-13
- Assignees: Knorr-Bremse Systeme Fuer Nutzfahrzeunge GmbH
- Inventors: Wolfgang PAHLE
- Web page: https://patentgrep.com/patent/US20090260933A1

## CPC

- F16D 65/123: {comprising an annular disc secured to a hub member; Discs characterised by means for mounting}
- F16D 65/847: with open cooling system, e.g. cooled by air
- F16D 2065/1316: {radially segmented}
- F16D 2065/1328: {internal cavities, e.g. cooling channels}
- F16D 2065/136: {with relative movement radially}
- F16D 2065/1384: {to wheel hub}
- F16D 2065/1392: {Connection elements}
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES

## Abstract

A disc/hub connection for connecting the brake disc with the hub is provided. The brake disc has support elements on the inner peripheral area and the hub has cams. The hub has a pot-like, hollow cylinder section that merges with a disc section that extends outward radially. The disc section has support rods that extend outward axially and that extend into the area where the brake disc contacts the pot-like section and that merge with the cams that, in turn, engage between the support elements of the brake disc. The support rods radially-placed inside the extension of the brake disc do not, or only by way of thin connection rods, connect radially with the outer periphery of the pot-like section.

## Claims

### Claim 1

A brake disc/hub connection for connecting a brake disc comprising friction rings connected via webs with a hub, the brake disc/hub connection comprising:
a pot-like, hollow cylindrical section of the hub, at one end of which extends a radially outward disc section;
support elements arranged about a radially inner peripheral region of the brake disc;
axially extending support webs which extend from the disc section into a region in which the brake disc is seated on the pot-like, hollow cylindrical section of the hub, said axially extending support webs forming cams that are arranged about an outer peripheral region of the pot-like, hollow cylindrical section of the hub, said cams engaging between the support elements to secure the support elements on the hub in a peripheral direction; and
wherein the cams are not connected or connected only via narrow connecting webs radially to the outer periphery of the pot-like, hollow cylindrical section of the hub, whereby air flow ducts are formed radially inward with respect to the support webs and the support elements.

### Claim 2 (depends on 1)

The brake disc/hub connection according to claim 1, wherein the connecting webs have a width in a circumferential peripheral direction less than 50% of the extent of the support webs in the circumferential peripheral direction in a region of the brake disc.

### Claim 3 (depends on 2)

The brake disc/hub connection according to claim 2, wherein the connecting webs have an extent in the circumferential peripheral direction less than 20% of the extent of the support webs in the circumferential peripheral direction in the region of the brake disc.

### Claim 4 (depends on 1)

The brake disc/hub connection according to claim 1, wherein the support webs have a substantially constant cross-section.

### Claim 5 (depends on 1)

The brake disc/hub connection according to claim 1, wherein the support webs have a cross-section which increases over their axially length toward the disc section.

### Claim 6 (depends on 1)

The brake disc/hub connection according to claim 1, wherein the support webs are configured such that a significant amount of the forces occurring during braking operation are introduced directly into the disc section via the support webs.

### Claim 7 (depends on 1)

The brake disc/hub connection according to claim 1, wherein the air flow ducts extend axially up to the disc section.

### Claim 8 (depends on 1)

The brake disc/hub connection according to claim 1, further comprising intermediate elements distributed between the support webs and the support elements.

### Claim 9 (depends on 8)

The brake disc/hub connection according to claim 8, wherein the intermediate elements each have a U-shaped configuration.

### Claim 10 (depends on 8)

The brake disc/hub connection according to claim 8, wherein the intermediate elements are formed as wire clamp elements.

### Claim 11 (depends on 8)

The brake disc/hub connection according to claim 8, wherein the intermediate elements are configured as U-shaped wire clamps, the U-shaped wire clamps engaging into respective grooves formed on the support webs.