Assembly comprising a translationally and rotationally immobile link axis, engine attachment or aircraft comprising such an assembly

Patent metadata

Field	Value
Publication number	US-11840347-B2
Application number	US-202017114703-A
Country	US
Kind code	B2
Filing date	Dec 8, 2020
Priority date	Dec 10, 2019
Publication date	Dec 12, 2023
Grant date	Dec 12, 2023

Abstract

An assembly including a link axis supported by first and second guiding rings positioned in first and second branches of a clevis, one of the guiding rings including a tubular extension, protruding with respect to an outer face of one of the branches, which has a threaded portion on its outer circumferential face. Complementing this, the assembly includes a nut configured to be screwed onto the threaded portion of the tubular extension and an immobilization system configured to immobilize the nut in translation and/or in rotation, the nut and the link axis being linked by a complete link that is non-removable or that forms a single-piece part. This solution makes it possible to reduce the number of parts forming the assembly. Also provided are an engine attachment and an aircraft including such an assembly.

First claim

The invention claimed is:

1. An assembly comprising:
a link axis comprising a cylindrical sidewall,
a clevis having a first branch and a second branch, the cylindrical sidewall of the link axis passing through aligned holes in the first branch and the second branch,
a first guiding ring supporting the link axis positioned in the first branch of the clevis, the first guiding ring having a flange on one end positioned against an inner face of the first branch of the clevis facing an inner face of the second branch and a tubular body terminating at an opposite end of the guiding ring, the tubular body having a diameter greater than a diameter of the cylindrical sidewall of the link axis,
a second guiding ring supporting the link axis, positioned in the second branch of the clevis, comprising a tubular body and a tubular extension protruding with respect to an outer face of the second branch,
wherein the tubular extension of the second guiding ring comprises an outer circumferential face having a threaded portion,
wherein the assembly comprises a nut configured to be screwed onto the threaded portion of the tubular extension of the second guiding ring and an immobilization system configured to immobilize the nut in at least one of translation or in rotation, and
wherein the nut and the link axis have a common axis of rotation and are linked by a complete link comprising a fixed coupling between the nut and a distal end of the link axis that is not removable or that forms a single-piece part, wherein the complete link is formed radially inwardly of a threaded connection between the nut and the tubular extension of the second guiding ring and forms a portion of a groove located between an inner wall of the nut and an outer surface of the link axis, wherein the tubular extension of the second guiding ring is housed within the groove, and wherein rotational movement by the nut is transferred to the link axis.

2. The assembly as claimed in claim 1 , wherein the link axis and the nut are linked by at least one weld to obtain the complete non-removable link.

3. The assembly as claimed in claim 2 , wherein the nut comprises a transverse wall having an inner face oriented toward a transverse face of the link axis and linked thereto by at least one weld of surface type.

4. The assembly as claimed in claim 3 , wherein the weld of surface type is obtained by friction welding.

5. The assembly as claimed in claim 2 , wherein the nut comprises an internal flange ring having an inner edge adjacent to the link axis and linked thereto by at least one circumferential weld forming a weld bead extending over at least a part of a circumference of the link axis.

6. The assembly as claimed in claim 5 , wherein the circumferential weld extends continuously over all the circumference of the link axis.

7. The assembly as claimed in claim 5 , wherein the circumferential weld is obtained by welding using an energy beam.

8. The assembly as claimed in claim 1 , wherein the link axis and the nut are linked by a force-fitting to obtain the complete non-removable link.

9. The assembly as claimed in claim 1 , wherein the immobilization system comprises:
a washer with first and second foldable spurs comprising a ring positioned around the tubular extension between the nut and the second branch in operation,
the first foldable spurs being configured to be folded against an outer circumferential wall of the nut in operation, and
the second foldable spurs being configured to be folded against a peripheral face of the second branch in operation.

10. An engine attachment comprising an assembly as claimed in claim 1 .

11. An aircraft comprising an assembly as claimed in claim 1 .

Assignees

• Airbus Operations Sas

Inventors

• Colmagro Jérôme
• Messina Paolo

Classifications

• B64D27/402

  comprising box like supporting frames, e.g. pylons or arrangements for embracing the power plant · CPC title

• F16C23/045 Primary

  for radial load mainly, e.g. radial spherical plain bearings · CPC title

• B64D27/26 Primary

  Operations & Transport · mapped topic

• B64F5/10

  Manufacturing or assembling aircraft, e.g. jigs therefor · CPC title

• F16C11/045

  with at least a pair of arms pivoting relatively to at least one other arm, all arms being mounted on one pin (crank-pins F16C11/02) · CPC title