Longitudinal beam transmission structure of cargo compartment floor

The invention relates to the field of aircraft structural design, in particular to a longitudinal beam transmission structure of a cargo compartment floor. The longitudinal beam transmission structurecomprises a longitudinal cargo compartment floor beam, a diagonal draw rod, a connecting joint, a diffuser, a frame and a long truss. One end of the longitudinal cargo compartment floor beam is connected to the frame and the middle part is hinged with the diagonal draw rod by a bolt. The other end of the diagonal draw rod is hinged to the connecting joint by a bolt; a vertical surface of the connecting joint is fixed with the frame vertically and the bottom surface is fixed with the diffuser; and the diffuser is fixed with the vertical surface of the long truss. Because of formation of the triangular stable structure and the only application of the axial load to the diagonal draw rod, the longitudinal beam reinforcing structure is simple, the weight is light, the processability is high, the cost is low, and the s