Variable-screw-pitch device and rotor wing assembly and multiple rotor wing aircraft adopting same

Abstract

The invention discloses a variable-screw-pitch device used for changing the screw pitch of a blade. The variable-screw-pitch-device comprises a fixing seat, a connecting rod, and a transmission assembly, wherein the connecting rod is used for penetrating a rotational main shaft adopted to drive the blade to rotate; the connecting rod is movably and oppositely connected with the fixing seat; the transmission assembly is connected with the fixing seat, and comprises a blade mounting seat used for mounting the blade; the blade mounting seat is connected with the connecting rod, and is used for changing the screw pitch of the blade by adopting the connecting rod to drive the blade mounting seat to rotate when the connecting rod performs reciprocating motion relative to the rotational main shaft. According to the variable-screw-pitch device provided by the invention, the connecting rod penetrates through the rotational main shaft, so that the variable-screw-pitch device is miniaturized; besides, the invention further discloses a rotor wing assembly and a multiple rotor wing aircraft, which adopts the variable screw pitch device.

Description

technical field [0001] The invention belongs to the field of aircraft, and in particular relates to a variable pitch device, a rotor kit using the device and a multi-rotor aircraft. Background technique [0002] A multi-rotor aircraft of the related art, which includes a fuselage, a number of arms connected to the fuselage and symmetrically distributed relative to the fuselage, a rotor kit located on each of the arms, and a set of rotors located on each of the arms. The motor on the arm is used to drive the rotor assembly. Any rotor kit has a rotor and a pair of fixed-pitch blades mounted on the rotor. Wherein, the rotation directions of two adjacent rotors are opposite, that is, half of the motors rotate clockwise, and the other half of the motors rotates counterclockwise, and the lift generated by the rotors of the multi-rotor aircraft is controlled by coordinating the rotation speed of each motor, thereby controlling The attitude and displacement of the multi-rotor airc...

AI Technical Summary

Problems solved by technology

[0004] 1. The rotor speed can only be changed simply by adjusting the speed of each motor to realize the change of lift force, resulting in the multi-rotor aircraft not responding fast enough and the wind resistance is not strong enough;

[0005] 2. During the descent, the rotation speed must be reduced to reduce the lift of the rotor. The reduction of the lift means that the ability to control the attitude of the multi-rotor aircraft is weakened, and the multi-rotor aircraft may sway or even lose control;

[0006] 3. Unable to achieve aerobatics;

[0007] 4. When any rotor fails, it is impossible to return

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