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Trapezoidal panel pin joint allowing free deflection between fuselage and wing

a technology of fuselage and pin joint, which is applied in the direction of fuselage, aircraft floors, transportation and packaging, etc., can solve the problems of increasing the risk of durability of parts, affecting the design and durability of pin joints, and causing stress on wing and fuselage, so as to reduce the significant weight and significant durability risk, improve the design of pin joints, and reduce the effect of induced stress

Active Publication Date: 2009-07-09
THE BOEING CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a new design for a pin joint in an aircraft fuselage that reduces weight and risk of durability issues. It allows for flexibility in the wing and fuselage without inducing high loads or point loads. The design includes a trapezoidal panel pin joint and flexible tee members that release two rotational degrees of freedom. This design also allows for efficient space utilization and weight and space saving within the composite structure architecture of an aircraft. Overall, the invention provides a solution for safely and flexibly deflecting an aircraft between a fuselage section and a wing section.

Problems solved by technology

In aircraft, large deflections between the wing and the fuselage due to wing bending can cause design and durability problems in the fuselage and fuselage to wing attachment structure.
However, such known designs can have less vertical distance to incur the large wing deflections, and this can induce stresses to the wing and fuselage.
This can increase the risk of durability of the parts, can require more structure, and can increase the weight of the aircraft.
In addition, known designs only release one rotational degree of freedom.

Method used

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  • Trapezoidal panel pin joint allowing free deflection between fuselage and wing
  • Trapezoidal panel pin joint allowing free deflection between fuselage and wing
  • Trapezoidal panel pin joint allowing free deflection between fuselage and wing

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Embodiment Construction

[0014]The invention now will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. Indeed, this invention may be embodied in several different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the scope of the invention to those skilled in the art. Like numbers refer to like elements throughout.

[0015]Referring now to the drawings, and in particular, to FIG. 1, there is shown a perspective view illustrating a trapezoidal panel pin joint 10 of the invention engaged with a wing portion 12 and a fuselage or body portion 14 of an aircraft. Preferably, the invention is used with large commercial aircraft. However, the invention may also be used with noncommercial aircraft. The pin joint 10 preferably comprises a vertical pin portion 16, a lug portion 1...

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Abstract

The invention is directed a trapezoidal panel pin joint for allowing deflection of an aircraft between a fuselage section and a wing section, wherein the pin joint comprises a vertical pin portion, a lug portion, and a clevis portion; wherein at least one vertical flexible tee member is positioned below the pin joint; and wherein the pin joint is coupled to at least two horizontal flexible tee members, such that the pin joint and vertical and horizontal flexible tee members, in combination, release two rotational degrees of freedom.

Description

BACKGROUND OF THE INVENTION[0001]1) Field of the Invention[0002]The invention relates to a pin joint in an aircraft fuselage. More particularly, the invention relates to a trapezoidal panel pin joint allowing free deflection between the fuselage and the wing of an aircraft.[0003]2) Description of Related Art[0004]In aircraft, large deflections between the wing and the fuselage due to wing bending can cause design and durability problems in the fuselage and fuselage to wing attachment structure. Known aircraft have wing to fuselage attachment structure that have accounted for this differential deflection by separating the top of the wing box and the fuselage with a horizontal flexible tee member. Known aircraft have a trapezoidal panel that is an extension of the wing rib at the wing / fuselage joint. Known trapezoidal panel designs have accounted for the differential deflection between the wing and the fuselage / fixed pressure deck by vertically separating the trapezoidal panel and fix...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B64C1/00
CPCB64C1/26
Inventor ESTELL, PATRICIA W.POLK, JOHN H.
Owner THE BOEING CO
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