US 10,239,602 B2Granted

Multi-spar torsion box structure

AssigneeAirbus Defence and Space GmbH

InventorsCarlos Garcia Nieto, Soledad Crespo Pena, Jesus Javier Vazquez Castro

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Abstract

Disclosed is a multi-spar torsion box structure comprising a plurality of spars of composite material arranged to form a multi-cell structure with two or more cells extending longitudinally along the torsion box, and upper and lower skin covers formed of composite material and joined to upper and lower surfaces of the multi-cell structure, respectively. The structure further comprises at least one belt-like reinforcing element extending around the outer perimeter of the torsion box, and fixed to the upper and lower surfaces of the multi-cell structure, and transversely arranged with respect to the longitudinal direction of the torsion box. The belt-like reinforcing element is made of a metallic or a composite material. The disclosed torsion box can advantageously be used in the manufacture of aircraft lifting surfaces, such as horizontal tailplanes (HTP) or wings.

Claims14

Dependent claims

A multi-spar torsion box structure, comprising:

a plurality of spars, including at least a front spar and a rear spar, of a composite material arranged to form a multi-cell structure with at least two cells extending in a longitudinal direction of said torsion box, said multi-cell structure having upper and lower surfaces,
upper and lower skin covers of a composite material are joined to said upper and lower surfaces, respectively, of said multi-cell structure,
wherein said multi-spar torsion box structure further includes at least one belt-like reinforcing element, said reinforcing element received in a groove and said belt-like reinforcing element is configured as a closed loop and extends completely around an outer perimeter of said torsion box, and fixed to said upper and lower surfaces of said multi-cell structure, and wherein at least a part of said belt-like reinforcing element is transversely arranged with respect to an axis (X) oriented in said longitudinal direction of said torsion box, and wherein said belt-like reinforcing element is made of a composite material, and wherein a width and a thickness of said reinforcing element is dimensioned to withstand torsional loads and to prevent deformations of said torsion box.

Dependencies are inferred from the claim text.