| 摘要 |
<p>An I-beam fuselage structure of an unmanned helicopter includes two side frames and a rotor wing frame mounted between the two side frames, and the side frames are I-beams. The fuselage structure takes I-beams as a main body structure, the inside of which is shaped like a trapezoid structure and is strengthened by a stiffening beam, characterized by high strength, simple structure and few components, disassembled quickly for maintenance. H-section steel is used for manufacturing beam structures, which further increases the lateral rigidity and resistance to bending of the fuselage structure. In addition, both the size and the weight of the fuselage structure are reduced, thus reducing the weight of the unmanned helicopter and improving the loiter time and running efficiency of the unmanned helicopter. Parts of the unmanned helicopter may be mounted on an extension beam arranged in parallel when the I-beams and the cross beams are not long enough, thus improving the flexibility in assembly of the fuselage structure. In addition, the extension beam may further improve the strength of the I-beams and the cross beams. Hollowed-out grooves on the stiffening beam may not only facilitate installation of the frame plate but also further reduce the weight of the fuselage structure.</p> |
