Flapping wing structure imitating insect aircraft

Abstract

The invention discloses a flapping wing structure imitating an insect aircraft. The flapping wing structure comprises an engine body, a plane 8-shaped track generation mechanism, wing rods and a connecting joint, wherein the plane 8-shaped track generation mechanism is formed by combining a crank-slider mechanism and a crank-rocker mechanism, and a sliding pair is formed by a slider (7) in the crank and rocker mechanism and a swinging rail (6) in the crank-rocker mechanism through a guide rod (8); the wing rods comprise an inner wind rod (19) and an outer wing rod (20), and a sliding pair is formed by the inner wing rod (19) and an outer wing rod (20); the inner wing rod (19) is connected with the slider (7) through a universal joint (21), and one end of the universal joint (21) is fixedly connected to the slider (7), while the other end is fixedly connected to the inner wing rod (19); and a sliding pair is formed by the outer wing rod (20) and the connecting joint. By adopting the mechanism, 8-shaped tracks can be drawn out on wing tips, and a 8-shaped axis is not changed relative to the position of the engine body during changing the parameters of a gear, a connecting rod or a mounting initial angle and the like.

Description

technical field [0001] The invention relates to a driving mechanism of a flapping-wing aircraft, in particular to a flapping-wing mechanism of an insect-imitating aircraft. Background technique [0002] Existing aircraft can be divided into fixed-wing aircraft, rotary-wing aircraft and flapping-wing aircraft. The flapping wing aircraft is an aircraft that imitates birds or insects and adopts the flapping wing flight mode. The flapping-wing aircraft provides both lift and thrust through only a pair of wings, and has the characteristics of compact structure, high aerodynamic efficiency, and good maneuverability. Unlike fixed-wing aircraft and rotary-wing aircraft, flapping-wing aircraft cannot be explained by traditional steady-state aerodynamic theory, and the current aerodynamic theory for low Reynolds number and unsteady flow fields is still under development. The unique structural characteristics and movement form of the flapping wing aircraft are the necessary condition...

AI Technical Summary

Problems solved by technology

[0004] Few of the existing flapping wing drive mechanisms can achieve a figure-8 flapping wing trajectory. Some of the existing flapping wing drive mechanisms with a "8" trajectory can obtain different figure-8 shapes by changing the size of the parts or the initial installation state. trajectory, but the position of the axis of symmetry of the figure-eight passing through the two circles relative to the body also changes greatly

This makes it necessary to readjust the relative position of the flapping wing drive mechanism and the aircraft body for each change

There are also some "8"-shaped flapping wing drive mechanisms that cannot achieve effective twisting of the wing surface, and require complex motion amplification mechanisms and large motion space, which is not conducive to the miniaturization of the aircraft.

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