Three-rotor-wing tail rotor hub of unmanned helicopter

Abstract

The invention discloses a three-rotor-wing tail rotor hub of an unmanned helicopter. The three-rotor-wing tail rotor hub comprises a tail shaft, a tail shaft seat, a tail shaft sleeve, a sliding sleeve, a crab claw, a crab claw connecting rod, rotor clamps, a bulb connecting rod, a tail shaft belt wheel, a tail rotor middle joint and a variable-pitch connecting rod. The tail shaft is assembled and fixed to the tail shaft seat through a flange bearing, the tail shaft belt wheel is arranged in the tail shaft seat, the tail rotor middle joint is fixed to the top end of the tail shaft, the tail rotor clamps are assembled on branches of the tail rotor middle joint, the crab claw connecting rod is fixed to rocker arms of the tail rotor clamps and connected with the crab claw, the crab claw is fixed to the tail shaft sleeve and the sliding sleeve in a matched mode, and the tail shaft sleeve and the sliding sleeve are fixedly assembled through two bearings. A steering engine rocker arm controls the variable-pitch connecting rod and drives the bulb connecting rod to move so as to drive the sliding sleeve, and finally a variable pitch of the tail rotor is achieved.

Description

technical field [0001] The invention relates to the technical field of aviation aircraft, in particular to a three-rotor tail rotor hub of an unmanned helicopter. Background technique [0002] Unmanned helicopters are generally used for military tasks such as aerial targets, battlefield reconnaissance, damage assessment, and target guidance. They can also be used for non-military tasks such as flight tests and aerial surveying and mapping. Compared with fixed-wing aircraft, unmanned helicopters have functions such as hovering and vertical take-off and landing, and can perform tasks more flexibly. Due to the limited rotor load of unmanned helicopters, the number of rotors has a great influence on the flight efficiency of unmanned helicopters. [0003] The structure of the helicopter tail rotor is similar to that of the rotor (except for the tailless rotor technology). It is located on the tail beam of the helicopter and is used to balance the reaction moment of the helicopte...

AI Technical Summary

Problems solved by technology

The Chinese patent application number of the prior art: 201510151969.3 has disclosed a tail rotor pitch variable structure of an unmanned helicopter, but the dual rotor structure still faces certain difficulties in offsetting the torque of the main rotor

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