# US 9,435,391 B2 · Disc brake for a commercial vehicle

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- Number: US 9,435,391 B2
- Document ID: US9435391B2
- Status: Granted
- Kind: B2
- Application number: 14/595,594
- Filed: 2015-01-13
- Published: 2015-05-07
- Granted: 2016-09-06
- Earliest claimed: 2012-07-13
- Assignees: KNORR-BREMSE Systeme fuer Nutzfahrzeuge GmbH
- Applicants: KNORR-BREMSE Systeme fuer Nutzfahrzeuge GmbH
- Inventors: Alfred Loew
- Web page: https://patentgrep.com/patent/US9435391B2

## CPC

- F16D 65/0087: {Brake housing guide members, e.g. caliper pins; Accessories therefor, e.g. dust boots}
- F16D 55/22655: {Constructional details of guide pins}
- F16D 65/0068: {Brake calipers}
- F16D 2055/0008: {Brake supports}
- F16D 2055/0016: {Brake calipers}
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES

## Abstract

A disc brake for a commercial vehicle includes a brake caliper, which surrounds a brake disc and which is retained on a stationary brake carrier by way of guide bushings. The guide bushings are fastened to the brake carrier by screws and are arranged parallel to and at a distance from each other and form plain bearings. The brake caliper is retained in such a way that the brake caliper can be moved in a brake-application direction. The disc brake is designed in such a way that each guide bushing is wedged together with the associated screw.

## Claims

### Claim 1

A disc brake for a commercial vehicle, the disc brake having a caliper which, in use, straddles a brake disk, comprising:
a stationary brake carrier;
guide bushings fastened to the brake carrier via screws, the guide bushings being arranged parallel and spaced apart from one another, wherein the caliper is mounted on the stationary brake carrier via the guide bushings so as to be displaceable in a brake application direction, and
wherein
each guide bushing is wedged against the brake carrier by an associated screw,
a wedge sleeve arranged between the screw and the associated guide bushing, the wedge sleeve having a wedge face that rises in a screwing-in direction of the screw, and
a cylindrical outer circumferential face of the wedge sleeve is supported on an inner side of the guide bushing, and further wherein an inner face of the wedge sleeve is configured as the wedge face against which bears a head of the screw.

### Claim 2 (depends on 1)

The disc brake according to claim 1, wherein the guide bushing is formed from a seamless tube.

### Claim 3 (depends on 1)

The disc brake according to claim 1, wherein the wedge sleeve comprises a continuous axial slot.

### Claim 4 (depends on 3)

The disc brake according to claim 3, wherein the wedge sleeve is formed from a rolled metal sheet, edges of which facing one another delimit the continuous axial slot by being arranged spaced apart from one another.

### Claim 5 (depends on 1)

The disc brake according to claim 1, wherein the wedge sleeve is pressed into the guide bushing.

### Claim 6 (depends on 1)

The disc brake according to claim 1, wherein the wedge sleeve is arranged in the guide bushing with a small amount of play.

### Claim 7 (depends on 1)

The disc brake according to claim 1, wherein the wedge sleeve is positioned on an end region of the guide bushing facing the brake carrier.

### Claim 8 (depends on 1)

The disc brake according to claim 1, wherein a gradient angle of the wedge face, and of the head of the screw bearing against the wedge face, are configured for a self-locking action.

### Claim 9 (depends on 1)

The disc brake according to claim 1, wherein:
the stationary brake carrier has stepped bores into which the guide bushings are fastened, and
the wedge sleeve is supported on a bottom of a first step of the stepped bore.

### Claim 10 (depends on 1)

The disc brake according to claim 1, wherein:
the stationary brake carrier has stepped bores into which the guide bushings are fastened, and
the wedge sleeve is supported on a radially inwardly directed circumferential collar of the guide bushing, which collar rests on a bottom of a first step of the stepped bore.

### Claim 11 (depends on 1)

The disc brake according to claim 1, wherein the wedge sleeve lies in an undercut section of the guide bushing, a diameter of the undercut section being greater than an inner diameter of the guide bushing.

### Claim 12 (depends on 1)

The disc brake according to claim 1, wherein a height of a conical face of the head of the screw corresponds approximately to a height of the wedge sleeve.