# US 11,077,930 B2 · Central airfoil box comprising a connecting rod and an adjustable anchoring system

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- Number: US 11,077,930 B2
- Document ID: US11077930B2
- Status: Granted
- Kind: B2
- Application number: 16/454,942
- Filed: 2019-06-27
- Published: 2020-01-02
- Granted: 2021-08-03
- Earliest claimed: 2018-06-29
- Assignees: Airbus Operations GmbH
- Applicants: Airbus Operations SAS
- Inventors: Julien Salomon
- Web page: https://patentgrep.com/patent/US11077930B2

## CPC

- B64C 3/22: Geodetic or other open-frame structures
- B64C 1/26: Attaching the wing or tail units or stabilising surfaces
- B64C: AEROPLANES; HELICOPTERS

## Abstract

A central airfoil box comprising two beams, each beam having a wall pierced with a first bore centered on a first axis, a connecting rod comprising, for each wall, a yoke joint having two flanks arranged on either side of the wall and pierced with a bore. Each yoke joint is fixed to the wall by a fixing system. The fixing system comprises a bearing lodging in the first bore, and being pierced with a second bore centered on a second axis parallel and offset to the first axis, a cylindrical shoulder, secured to and coaxial with the bearing and bearing against the wall, an outer perimeter of the shoulder having a plurality of splines, at least one block fixed to the wall around the first bore and configured to lodge in one of the splines, and a shaft lodging in the second bore and the yoke joint bores.

## Claims

### Claim 1

A central airfoil box comprising:
two beams, each beam having a wall pierced with a first bore centered on a first axis,
a connecting rod comprising, for each wall, a yoke joint having two flanks arranged on either side of the wall and pierced with a bore, and in which each yoke joint is fixed to the wall by a fixing system,
at least one of the fixing systems comprising an anchoring system which comprises:
a bearing lodging in the first bore, and being pierced with a second bore centered on a second axis parallel to said first axis and offset relative to said first axis,
a cylindrical shoulder, secured to and coaxial with the bearing and configured to come to bear against the wall, an outer perimeter of the shoulder having a plurality of splines,
at least one block fixed to the wall around the first bore and configured to lodge in one of the splines, and
a shaft lodging in the second bore and the bores of the yoke joint.

### Claim 2 (depends on 1)

The central airfoil box according to claim 1, wherein each spline is formed as an outwardly open half-cylinder whose axis is parallel to the first axis and wherein each block is formed as a cylinder whose diameter is equal to the diameter of the splines and whose axis is parallel to the first axis.

### Claim 3 (depends on 1)

An aircraft comprising a central airfoil box according to claim 1.