Tail-drive variable pitch structure of a plant protection drone

By introducing a hydraulic cylinder-driven sliding column and connecting rod assembly into the tail drive pitch-changing structure of the agricultural drone, the tail rotor angle and length can be adjusted, solving the problem of the traditional tail rotor being non-adjustable and improving flight stability and farmland operation efficiency.

CN224427878UActive Publication Date: 2026-06-30HAINAN NAVIGATOR AVIATION TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-08-25
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

The tail rotor angle is not adjustable in the tail drive variable pitch structure of traditional agricultural drones, resulting in insufficient adaptability and stability under different flight conditions, which affects the accuracy of flight control and mission execution efficiency.

Method used

A tail drive variable pitch structure for an agricultural protection UAV was designed. It uses a hydraulic cylinder to drive a sliding column and a connecting rod assembly. The hydraulic cylinder drives the sliding column and connecting rod to rotate, thereby adjusting the tail rotor angle and length. Combined with the motor to provide power, it ensures the stability and adaptability of the tail rotor under different flight conditions.

Benefits of technology

It enables flexible adjustment of the tail rotor angle and length, improving flight stability and controllability, and ensuring the accuracy and efficiency of farmland operations.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224427878U_ABST
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Abstract

This utility model relates to the field of variable pitch structure technology and discloses a tail drive variable pitch structure for a plant protection UAV. It includes a fixed column, an adjustment mechanism fixedly connected inside the fixed column, a variable pitch mechanism inside the adjustment mechanism, and a hydraulic cylinder. A sliding column is fixedly connected to the driving end of the hydraulic cylinder. Two connecting rods are rotatably connected to the outside of the sliding column. A connecting block is fixedly connected to the outside of the connecting rods. A rotating plate is fixedly connected to the outside of the connecting block. A tail rotor is fixedly connected to the outside of the rotating plate. A drive assembly is fixedly connected to the outside of the fixed column. In this utility model, the hydraulic cylinder drives the sliding column to slide on the inner wall of the support column. The sliding column drives the connecting rods to rotate, the connecting rods drive the connecting block to move, and the connecting block drives the rotating plate to rotate on the inner wall of the fixed column. The tail rotor on the rotating plate is driven.
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