Variable pitch propeller

Abstract

The invention discloses a variable-pitch propeller, which comprises a motor, a blade installation seat, blades, a pitch-variable rocker arm, a pitch-variable shift fork, a guide seat and a drive rod. The center shaft of the motor, the center of the paddle mounting seat, the center of the guide seat and the center of the pitch-changing fork are all provided with through holes along the vertical direction. The guide seat is installed in the through hole in the center of the motor shaft, the through hole of the paddle mounting seat is set on the upper part of the guide seat and is fixedly connected with the rotating part of the motor at the same time, and the driving rod passes through the center through hole of the guide seat and the The through hole in the center of the pitch change fork connects the motor, the guide seat, the paddle mounting seat and the pitch change fork together. The variable-pitch propeller provided by the present invention is driven by a motor with a through hole in the central shaft, and the pitch-changing mechanism synchronously and reversely controls the pitch change of the blades through the drive rod passing through the through hole on the central shaft of the motor, and has a small number of components, Reasonable structural design, light weight of the whole machine and other advantages, while improving reliability and maintainability.

Description

technical field [0001] The invention belongs to the field of aviation technology, in particular to a variable-pitch propeller for light, small and miniature fixed-wing unmanned aerial vehicles. Background technique [0002] Generally, light, small and miniature low-speed aircraft use fixed-pitch propellers. After reaching a certain flight speed, the airflow of the blades begins to separate. Even if the engine power is increased, it is difficult to increase the speed, and the efficiency of the blades decreases. The variable pitch propellers used in existing large-scale aircraft generally use a hydraulic system to drive the variable pitch mechanism, while currently light, small, and micro drones generally use geared motors to drive the worm gear to drive the variable pitch mechanism, and the above pitch variable mechanisms are relatively complicated. And the weight is relatively large, so it is not suitable for the application of light, small and micro drones. Also, each blad...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a variable-pitch propeller that can be used for light, small and miniature unmanned aerial vehicles in order to change the current situation of low efficiency of existing fixed-pitch propeller blades, complex structure and poor reliability of variable-pitch propellers. The pitch propeller is driven by the outer rotor motor or the inner rotor hollow shaft motor. The pitch variable mechanism controls the pitch of the blades through the drive rod located on the central axis of the motor, which reduces the number of components and the weight of the whole machine, and improves reliability and reliability. maintainability

Images