Foldable UAV Arm Connection Structure for Stable Flight Locking
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Solution Overview
Problem
The existing arm connection structures in unmanned rotorcrafts lead to unstable flight due to shaking during flight processes, as they cannot be folded and are fixed relative to the body, resulting in a large volume and inconvenient carriage.
Innovation Solution
A rotatable arm connection structure featuring a connection shaft, a shaft sleeve with a curved guide slot, a guide block, and an elastic member, allowing the arm to switch between unfolded and folded states securely, preventing shaking during flight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the arm is fixed to the body and cannot rotate, then the structure is simple and stable, but the volume is large and carriage is inconvenient
Solution Approach 1:
The arm connection structure transitions from a fixed static connection to a dynamic rotatable connection. The arm can rotate relative to the body around a vertical axis, allowing it to switch between extended and folded positions. This dynamic capability reduces vehicle volume for carriage while maintaining flight stability through controlled positioning during operation.
Solution Approach 2:
The connection structure is divided into separate rotatable components including the arm, connection shaft, shaft sleeve, and locking mechanism. This segmentation allows independent movement and positioning of the arm relative to the body, enabling compact folding without compromising the overall structural integrity during flight.
2Ease of operation
If the arm connection structure allows rotation and folding, then the volume is reduced and carriage is convenient, but the vehicle shakes during flight and flight becomes unstable
Solution Approach 1:
The connection structure incorporates an automatic locking mechanism that engages itself when the arm reaches the folded or extended position. The guide block automatically enters the curved guide slot and locks at predetermined positions, providing self-stabilization without external intervention. This ensures reliable positioning during flight while maintaining ease of folding for carriage.
Solution Approach 2:
The guide block acts as an intermediary element between the arm and the connection shaft. It mediates the rotational movement by sliding along the curved guide slot and engaging with locking positions, thereby controlling the arm's movement and preventing unwanted shaking during flight while enabling convenient folding.
3Device complexity
If the arm connection structure uses a simple fixed connection, then the structure is simple, but the arm cannot be folded and the volume is large
Solution Approach 1:
The shaft sleeve is nested within the connection shaft, and the guide block is nested within the shaft sleeve. This nested arrangement allows the arm to fold compactly within the body structure, significantly reducing vehicle volume when folded while maintaining a relatively simple overall structure during extended operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution stabilizes the flight of unmanned aerial vehicles by ensuring stable sliding of the guide block within the cam guide slot, locking the arm in desired positions, thus preventing instability and ensuring reliable state switching between unfolded and folded states.
Implementation Method 1
an elastic member, where the elastic member is sleeved on the connection shaft
Implementation Method 2
the connection shaft is provided with a guide block that matches the curved guide slot and that can slide in the curved guide slot
Data Source
AI summary
An arm connection structure for connecting an arm to a body provided in the present invention includes: a connection shaft, a shaft sleeve that can be sleeved on the connection shaft in a manner of rotating relative to the connection shaft, and an elastic member sleeved on the connection shaft. The shaft sleeve is provided with a curved guide slot extending along a peripheral direction of the shaft sleeve, and the connection shaft is provided with a guide block that matches the curved guide slot and that can slide in the curved guide slot. The curved guide slot has a first lock position for locking the arm in an unfolded state, and a second lock position for locking the arm in a folded state. The present invention can make the arm not easily shake in a flight process of an unmanned aerial vehicle, making flight more stable.