Rotary folding mechanism

Abstract

The invention provides a rotary folding mechanism which comprises a wing shaft, a torsional spring and a tension spring, one end of the wing shaft is provided with a hinge seat, and the other end of the wing shaft is of a hollow circular tube structure; wing roots of the aircraft wings are hinged to the hinge seats of the wing shafts, and torsional springs are installed on the wing shafts and provide power for the wings to rotate around the hinge shafts to be unfolded towards the outside of the aircraft body; at least one circumferential inclined surface is arranged at one end, far away from the hinge seat, of the circular pipe and is matched with a pin on the aircraft main body, so that the wing shaft extends out of or retracts into the aircraft body when rotating around the axis of the circular pipe; tension springs are connected between the wing shafts and the aircraft body and provide power for the wing shafts to retract into the aircraft body. The mechanism can sink into the aircraft body, and aerodynamic resistance during flight is reduced.

Description

technical field [0001] The invention belongs to the technical field of aerospace systems, and relates to a rotating and folding mechanism for wings or rudders of unmanned aerial vehicles. Background technique [0002] There are three main folding methods for the wings or rudders of UAVs (collectively referred to as wings in the text): horizontal folding, longitudinal folding (embedded) and rotating folding. The first two applications are more common, while the rotary folding application is less, and it is only applied to the folding wings of some small unmanned aerial vehicles with relatively large wingspans. For wings or rudders with a relatively large aspect ratio, the use of horizontal folding will cause the wing surface to fold multiple times and interfere with each other, and the use of longitudinal folding will destroy the design layout of the unmanned aerial vehicle because it takes up too much space in the aircraft. Therefore, neither horizontal folding nor longitud...

AI Technical Summary

Problems solved by technology

[0006] The problem with the current typical rotary folding mechanism is that the exposed part of the folding mechanism cannot sink into the main body of the aircraft

The folding movement needs to be realized through mechanisms, and the related mechanisms are complex in shape, and even if optimized, it is impossible to achieve the aerodynamic characteristics of the wing section

In related mechanisms, parts such as scroll springs can be designed inside the main body of the aircraft, but parts such as the folded hinge structure of the wing surface will inevitably be exposed outside the main body of the aircraft, destroying the aerodynamic shape of the UAV and increasing the Aerodynamic drag

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