1. Field of the Invention
The subject matter of the present invention is the area of connection of a fuselage to an aircraft wing.
2. Description of the Related Art
The conventional mode of connection comprises, as is represented in
This design is complicated, and gives a connection quite long to manufacture, and which is in addition heavy. The aim of the invention is to propose a different connection, simplified with respect to the prior design.
In a general manner, the invention relates to a connection of a fuselage to an aircraft wing, the wing comprising a rib extending the fuselage and a wing upper surface panel joined to the rib, characterised in that the rib extends above the wing upper surface panel and is joined to the fuselage at an upper line higher than a junction line from the wing upper surface panel to the rib.
The projecting rib enables an assembly to other fuselage panels over a contour simpler than that of the upper line 12 of
The structure of the aircraft is not substantially weakened despite the omission of the connection piece 1 since the stresses of the wing remain transmitted to the rest of the aircraft by the wing box through the rib. The simplification of the assembly can, quite the opposite, lead to reinforcing it as regards the risks of rupture through fatigue or through corrosion of the assemblies.
An important advantage of the invention is that the upper line is advantageously horizontal and may thus be assembled very easily to the rest of the fuselage, especially if said upper line belongs to a junction line of two horizontal strips of panels of said fuselage. In an even better manner, the upper line can extend to a neutral bending line of the aircraft in a vertical plane, which considerably reduces the stresses.
The simplification of the structure of the aircraft is more extensive if the rib further encompasses a slanting frame panel.
A satisfactory fastening of the wing to the wing box is re-established if the wing upper surface panel and the wing box upper surface panel extending it are joined by brackets resting on the rib to an upper face and to a lower face of said upper surface panels, and assembled with bolts traversing the rib, thus replacing the link procured by the connection piece 1.
Such a connection is particularly advantageous with a fuselage made of composite material, since no panel then needs to be assembled to the connection piece 1 near the wing and wing box upper surface panels, where the stresses are important.
Another aspect of the invention is an aircraft provided with a connection according to the preceding description.
The invention will now be described in a purely illustrative manner with reference to the figures, among which:
and the other
Reference is made to
The connection piece (1) is, as is represented in
The rib (13) may also be extended towards the rear with respect to the known rib (5), henceforth encompassing the slanting frame panel (20); its rear edge (23) is then itself also connected to the fuselage (2). It is obvious that the integration of a part of the surface area of the fuselage in the rib (13), which is achieved in this invention, gives a more coherent connection, the fuselage panels being regular and the shape irregularities being all grouped together on the rib, which is in any case a part intended to absorb considerable stresses. The extension of the surface area of the rib also avoids that other parts of the aircraft, less resistant, are adjacent to the wing and to the stresses that pass through it. The manufacture of the aircraft itself must be simplified. The thermal stresses in the connection area, due to differential expansions, are considerably reduced or eliminated, as are problems linked to galvanic corrosion not just during routine use but also during assembly. These different advantages make it possible to construct more easily the fuselage made of composite material.
Number | Date | Country | Kind |
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11 52493 | Mar 2011 | FR | national |
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323 283 | Jul 1920 | DE |
2 916 417 | Nov 2008 | FR |
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Entry |
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French Search Report issued Nov. 8, 2011 in Patent Application No. 1152493 with English Translation of Category of Cited Documents. |
Number | Date | Country | |
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20120286090 A1 | Nov 2012 | US |