# US 8,771,089 B2 · Elastic joint body having a collar bushing arrangement to protect loops

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- Number: US 8,771,089 B2
- Document ID: US8771089B2
- Status: Granted
- Kind: B2
- Application number: 13/822,698
- Filed: 2011-09-23
- Published: 2013-07-04
- Granted: 2014-07-08
- Earliest claimed: 2010-09-27
- Assignees: SGF Sueddeutsche Gelenkscheibenfabrik GmbH & Co. KG
- Applicants: Bernd Scheper; Jan Hoffman; Joachim Reihle; Marc Brandl; Thomas Lechner
- Inventors: Bernd Scheper; Jan Hoffman; Joachim Reihle; Marc Brandl; Thomas Lechner
- Web page: https://patentgrep.com/patent/US8771089B2

## CPC

- F16D 3/70: comprising elastic elements arranged in holes in one coupling part and surrounding pins on the other coupling part
- F16D 3/62: the links or their attachments being elastic
- F16D 3/78: shaped as an elastic disc or flat ring, arranged perpendicular to the axis of the coupling parts, different sets of spots of the disc or ring being attached to each coupling part, e.g. Hardy couplings
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES

## Abstract

An elastic joint body for a shaft arrangement for the articulated connection of two shaft sections includes a plurality of bushings disposed in the circumferential direction at predetermined angular distances relative to a central axis of the joint body, a plurality of loop bundles, and a rubber elastic casing. Each loop bundle loops around two adjacent bushings and each bushing is looped by at least two of the plurality of loop bundles. Each of the plurality of bushings is provided with a plurality of bushing components. A first bushing component has an axial shaft section against which one of the loop bundles rests and wherein a second bushing component has a radial collar section against which the loop bundle rests. The first bushing component rests, without fixing, against the second bushing component in a contact zone offset relative to the loop bundle in the axial direction.

## Claims

### Claim 1

An elastic joint body for a shaft arrangement for an articulated connection of two shaft sections, comprising:
a plurality of bushings disposed in a circumferential direction at predetermined angular distances relative to a central axis of the elastic joint body;
a plurality of loop bundles, wherein each loop bundle loops around each of two adjacent bushings, and each bushing is looped by at least two loop bundles;
a rubber-elastic casing in which the plurality of loop bundles and the plurality of bushings are at least partially embedded,
wherein the plurality of bushings are provided with a plurality of bushing components, wherein a first bushing component has an axial stem section and a radial collar section against which one of the plurality of loop bundles rests, and wherein a second bushing component has a radial collar section against which a loop bundle rests,
wherein the first bushing component separates loop bundles, and wherein the first bushing component rests, without fixing, with an end face of its axial stem section against the second bushing component in a contact zone which is offset relative to the loop bundle in an axial direction.

### Claim 2 (depends on 1)

The elastic joint body according to claim 1, wherein the contact zone is offset relative to the loop bundle in the axial direction by a distance which is greater than a diameter of an individual thread of a loop bundle.

### Claim 3 (depends on 1)

The elastic joint body according to claim 1, wherein the second bushing component has a substantially L-shaped cross-section, the contact zone being provided by offsetting a bending point of the L-shaped cross-section.

### Claim 4 (depends on 3)

The elastic joint body according to claim 3, wherein an amount of the offset corresponds to approximately half of a material thickness of the second bushing component.

### Claim 5 (depends on 1)

The elastic joint body according to claim 1, wherein the second bushing component has in the contact zone a planar end face against which a complementary end face of the axial stem section of the first bushing component rests in a planar manner.

### Claim 6 (depends on 1)

The elastic joint body according to claim 1, wherein a collar section of the second bushing component encloses an angle (90°-α) of 90° to 80°, with an axial section of the second bushing component.

### Claim 7 (depends on 1)

The elastic joint body according to claim 1, wherein the second bushing component has rounded transitions.

### Claim 8 (depends on 1)

The elastic joint body according to claim 1, wherein the radial collar section of the second bushing component encloses an angle (90°-α) of 85°, with an axial section of the second bushing component.