Variable pitch propeller and unmanned aerial vehicle

Abstract

The invention belongs to the technical field of aviation, and particularly relates to a variable pitch propeller and an unmanned aerial vehicle. The variable pitch propeller comprises a rotating shaft, a first bevel gear, a second bevel gear, a shaft hub and fixed shafts, wherein the first bevel gear is fixed to the rotating shaft, the second bevel gear is rotatably connected to the rotating shaft, the shaft hub is arranged on the rotating shaft between the first bevel gear and the second bevel gear in a sleeving mode and is rotatably connected with the rotating shaft, and the fixed shafts are fixedly connected with the shaft hub and are axially perpendicular to the shaft hub; propeller hubs which are rotatably connected with the fixed shafts are arranged on the fixed shafts in a sleeving mode; torsional deformation pieces which are fixedly connected with the shaft hub and the propeller hubs are arranged on the fixed shaft part between the propeller hubs and the shaft hub in a sleeving mode; propeller blade driving bevel gears which are engaged with the first bevel gear and the second bevel gear are fixedly mounted on the propeller hubs; and the unmanned aerial vehicle comprises the variable pitch propeller. Automatic adjustment of the propeller pitch is realized under interaction between torque of the rotating shaft and reactive torque of the torsional deformation pieces; when the torque becomes large, the propeller pitch becomes small, the thrust performance is enhanced, improvement of the acceleration ability and the flying speed are facilitated, and the problems that the acceleration ability of the variable pitch propeller which changes the propeller pitch through thrust is weak and improving of the flying speed is not easy are solved.

Description

technical field [0001] The invention belongs to the technical field of aviation, and in particular relates to a variable-pitch propeller and an unmanned aerial vehicle. Background technique [0002] The variable pitch propeller changes the pitch through the thrust, and the corresponding blade angle will also change when the pitch changes. The thrust generated by the propeller is used to adjust the pitch through the deformation of the spring. When the thrust is large, the pitch decreases, and when the thrust is small, the propeller The main disadvantage of this variable pitch propeller is that it cannot provide good acceleration capability, and the flight speed is not easy to increase. Contents of the invention [0003] The object of the present invention is to provide a variable-pitch propeller and an unmanned aerial vehicle, aiming to solve the problems of weak acceleration capability and difficulty in increasing the flight speed of the variable-pitch propeller whose pitc...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a variable-pitch propeller and an unmanned aerial vehicle, aiming at solving the problems that the variable-pitch propeller whose pitch is changed by thrust is weak in acceleration and the flight speed is not easy to increase

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