Quick-Release UAV Propeller Hub With Spring Plate Blade Locking
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Solution Overview
Problem
Conventional propulsion mechanisms for UAVs are often large, mechanically complex, and prone to loose connections, which negatively impact flight performance and complicate storage and replacement.
Innovation Solution
A propulsion mechanism featuring a hub with a spring plate assembly that includes a hub plate, pressure plate, and a biasing member to increase friction between blades and the hub, allowing for easy coupling and decoupling, reducing mechanical complexity and facilitating interchangeable blades.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional propulsion mechanisms are used, then the structure is stable and reliable, but the device complexity increases and the size becomes large
Solution Approach 1:
The hub is divided into multiple functional components: a hub plate with bosses for blade attachment, a pressure plate with a keyhole for shaft coupling, and a biasing member (spring) positioned between them. This segmentation allows each component to perform its specific function while reducing overall mechanical complexity and enabling easier assembly and disassembly of the propulsion mechanism.
2Reliability
If conventional propulsion mechanisms are used, then the blades are securely attached, but the assembly and disassembly processes become time-consuming
Solution Approach 1:
The biasing member (spring) is pre-installed between the hub plate and pressure plate, creating preliminary compressive force that automatically secures the blades when the pressure plate is tightened against the hub plate. This preliminary action eliminates the need for additional fastening steps and allows for rapid blade attachment and detachment without compromising security.
3Stability of the object's composition
If conventional propulsion mechanisms are used, then the blades remain fixed during operation, but the friction between blades and hub decreases over time
Solution Approach 1:
The biasing member (spring) provides dynamic, self-adjusting compressive force between the hub plate and pressure plate, maintaining consistent friction and pressure on the blades during operation. As the blades experience wear or thermal expansion, the spring automatically adjusts to maintain the necessary friction force, ensuring reliable blade-hub connection stability throughout the operational lifecycle.
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 provides a simpler, more reliable propulsion system that maintains flight performance while enabling easy assembly, disassembly, and storage, with improved packaging and reduced mechanical complexity.
Implementation Method 1
The biasing member is configured to increase friction between the one or more blades and hub plate
Data Source
AI summary
A propulsion mechanism for an unmanned aerial vehicle (UAV) is disclosed. The propulsion mechanism includes one or more blades configured for rotation by a motor and a hub configured for coupling to the motor. The hub includes a spring plate assembly. The spring plate assembly includes a hub plate that includes a mating portion, a pressure plate that includes a keyhole that receives the mating portion of the hub plate to couple the hub plate to the pressure plate, and a biasing member configured to be disposed along a shaft of the motor between the motor and the pressure plate. The one or more blades are coupled to the hub between the hub plate and the pressure plate. Additionally, the biasing member is configured to increase friction between the one or more blades and hub plate.