Horizontally folded contra-rotating propeller

A counter-rotating propeller and horizontal folding technology, which is applied to rotorcraft, unmanned aircraft, aircraft, etc., can solve the problems of beating the upper and lower propellers, and achieve the effects of ensuring stability, reducing complexity and improving reliability

Pending Publication Date: 2017-05-31
北京华信智航科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (3) During violent maneuvers,

Method used

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  • Horizontally folded contra-rotating propeller
  • Horizontally folded contra-rotating propeller
  • Horizontally folded contra-rotating propeller

Examples

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Embodiment Construction

[0022] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0023] Such as Figure 1-Figure 4 As shown, a horizontally folded counter-rotating propeller of the present invention is characterized in that the counter-rotating propeller includes a first propeller, a second propeller and a connecting transmission part;

[0024] Wherein, the first propeller includes a first hub, a first blade, a second blade and a first folding shaft; the second propeller includes a second hub, a third blade, a fourth blade and a first Two folding rotating shafts; the first propeller hub and the second propeller hub are arranged sequentially from top to bottom, the first blade is movably connected to the end of one end of the first propeller hub through the first folding rotating shaft, and the second propeller hub The two blades are movably connected to the end of the other end of the first hub through the first folding s...

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Abstract

The invention relates to a contra-rotating propeller blade structure, in particular to a horizontally folded contra-rotating propeller which is foldable and used for a structure of a cylindrical emission type unmanned aerial vehicle. A first propeller comprises a first propeller hub, a first propeller blade, a second propeller blade and a first folding rotating shaft; and a second propeller comprises a second propeller hub, a third propeller blade, a fourth propeller blade and a second folding rotating shaft. Through adoption of the technical scheme, the propeller blades are horizontal three-fold propeller blades and rotate around fixed rotating shafts; and the rotation directions of the two pairs of propeller blades are reverse to each other so that the self-balancing of reverse torque is realized. Through the engaged rotations of two pairs of symmetric bevel gears, synchronized and reverse rotation is realized. As limiting devices are arranged on the folded propeller blades, the propeller blades can be jammed in one way when being unfolded to reach a collinear position of the two propeller blades, and therefore, the stability in rotation is ensured. The complexity degree of the mechanism is reduced and the reliability of the mechanism is enhanced. As the horizontally folded contra-rotating propeller is naturally unfolded by means of centrifugal force in rotation and driven by the two pairs of symmetric engaged bevel gears, strict synchronized and reverse rotation is realized.

Description

technical field [0001] The invention relates to a counter-rotating propeller structure, in particular to a foldable horizontally folded counter-rotating propeller used in the structure of a barrel-launched unmanned aerial vehicle. Background technique [0002] In view of Beijing University of Aeronautics and Astronautics, Yang Xingbang, Wang Tianmiao, Liang Jianhong, Wu Hailiang, Yao Guocai; A Pneumatic Folding Device with Variable Wing Sweep Angle for Amphibious UAVs: China, Patent No.: ZL 2013 10087234. X, application date: 2013-03-19, publication number: CN103224021A, publication date: 2013-07-31, authorization date: 2014-12-10. (authorized) patent. This patent is intended to be used in the power plant of the amphibious UAV across the sea and air. It adopts a coaxial reverse propeller drive design, which can eliminate the reverse torque of the propeller. However, the patent has the following problems: [0003] (1) A pair of propellers are folded up and down respectively,...

Claims

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Application Information

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IPC IPC(8): B64C27/10B64C27/50
CPCB64C27/10B64C27/50B64U10/10
Inventor 陈波吴琳杜凡樊贺阳徐大新
Owner 北京华信智航科技有限公司
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