Folding rotor wing of coaxial unmanned helicopter

A technology of unmanned helicopters and rotors, applied in the field of UAVs, can solve problems such as uncontrolled blade swing, uneven speed, and no limiter design, so as to improve stability and safety, improve stability, and maintain convenient effect
CN110979658APending Publication Date: 2020-04-10BEIJING ZHZ TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING ZHZ TECH
Publication Date
2020-04-10

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Abstract

The invention provides a folding rotor wing of a coaxial unmanned helicopter. The folding rotor wing comprises a variable-pitch propeller hub, a folding propeller clamp assembly, blades, a torsional spring and a centrifugal pendulum limiter, and the folding propeller clamp assembly is rotationally connected to the end portion of the variable-pitch propeller hub through a flapping bolt and a flapping bearing; the blades are connected to the end portion of the folding paddle clamp assembly; the flapping bolt is sleeved with the torsional spring, the upper torsional arm of the torsional spring stretches into the through hole of the variable-pitch propeller hub, and the lower torsional arm of the torsional spring abuts against the bottom of the folding propeller clamp assembly; and the centrifugal pendulum limiter is movably connected to the variable-pitch propeller hub through a rotating shaft, and after the folding propeller clamp assembly is unfolded, the centrifugal pendulum limiter isconnected to the end portion of the folding propeller clamp assembly in a clamped mode. The rotor wing avoids the blade beating phenomenon, the operation stability is high, the safety is high, and the installation is convenient.
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Description

technical field

[0001] The present application relates to the technical field of unmanned aerial vehicles, in particular to a coaxial unmanned helicopter with folding rotors. Background technique

[0002] At present, with the continuous development of science and technology, unmanned aerial vehicles have been widely used. Unmanned aerial vehicles are unmanned aircraft operated by radio remote control equipment and self-contained program control devices. The UAV provides lift to the UAV through the high-speed rotation of the rotor. The existing UAV rotor with similar foldable blades uses flapping hinges to realize the folding of the rotor blades, and the blades swing up and down perpendicular to the rotor plane. Although the above-mentioned rotor can satisfy the basic functions, it has the following deficiencies:

[0003] 1) During the unfolding process, due to the uneven rotation speed, the blades are uncontrolled and easy to paddle;

[0004] 2) The current deployment mech...

Claims

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