Aircraft deformation nose cone device based on spatial two-degree-of-freedom expandable mechanism

Abstract

An aircraft deformation nose cone device based on a spatial two-degree-of-freedom expandable mechanism comprises nose cone shells which are divided into three stages or above in total. The first-stagenose cone shell is in a cylinder shape with the largest diameter; the diameters of the intermediate-stage nose cone shells are decreased progressively, and the intermediate-stage nose cone shells areeach in a circular table shape; and the outermost end of the last-stage nose cone shell body has the spherical crown characteristic. The nose cone shells are connected through stretching bending rodsystem mechanisms and two sets of auxiliary sphere pair mechanisms. Each stretching bending rod system mechanism is composed of two sets of stretching bending rod systems which are symmetrically mounted with respect to the horizontal splits of the nose cone shells, and each set of stretching bending rod system comprises four parallelogram transmission rod systems, wherein inputs of the four parallelogram transmission rod systems of each stage are connected with a former-stage driving rod, and outputs of the four parallelogram transmission rod systems of the last stage are connected with a tailrod. The two sets of auxiliary sphere pair mechanisms are symmetrically distributed and mounted with respect to the vertical splits of the nose cone shells. According to the aircraft deformation nosecone device, overall free stretching out and drawing back and bending can be achieved, and the advantages of large deformation quantity, easy driving and the like are achieved.

Description

technical field [0001] The invention relates to the field of aerospace technology, in particular to an aircraft deformation nose cone device based on a space two-degree-of-freedom expandable mechanism. Background technique [0002] During the flight missions of aerospace vehicles, the flight environment varies greatly, so it is necessary to change the aerodynamic shape of the aircraft, and the nose cone is the key structure that affects the air resistance of the aircraft. From the perspective of bionics, the deformation characteristics required by the head cone are very similar to the deformation of the bee's abdomen, that is, to achieve flexible bending and stretching deformation. However, most of the current head cones are fixed structures, which cannot achieve flexible bending and stretching deformation. Contents of the invention [0003] In order to overcome the shortcomings of the above-mentioned prior art, the object of the present invention is to provide an aircraft...

AI Technical Summary

Problems solved by technology

From the perspective of bionics, the deformation characteristics required by the head cone are very similar to the deformation of the bee's abdomen, that is, to achieve flexible bending and stretching deformation. However, most of the current head cones are fixed structures, which cannot achieve flexible bending and stretching deformation.

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