Folding Propeller Hub with Single-Contact Blade Mounting
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Solution Overview
Problem
Existing folding propellers are not convenient for mold adjustment and have high production costs due to the need for adjusting friction between the hub and blades, which requires multiple contact surfaces.
Innovation Solution
A folding propeller design with a hub having a first and second surface, where blades are mounted on the second surface by connecting pieces, allowing for adjustment of rotary damping by modifying the friction force of a single contact surface, and incorporating a boss to distribute forces during high-speed rotation, eliminating the need for a clamping structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a clamping structure with multiple contact surfaces is used to mount blades on the hub, then the rotary damping between hub and blades can be adjusted, but the mold adjustment becomes inconvenient and production cost increases
Solution Approach 1:
The patent extracts the friction adjustment function from the clamping structure by removing the second contact surface. Instead of adjusting friction between two surfaces, the design uses a single contact surface between the blade root and hub, eliminating the complex clamping structure while maintaining rotary damping control through the single friction interface.
Solution Approach 2:
The patent introduces a connecting piece as an intermediary element between the blade and hub. This connecting piece simplifies the mounting structure by providing a single contact surface interface, replacing the need for complex multi-surface clamping arrangements while still achieving the desired rotary damping characteristics.
2Strength
If a clamping structure is used to mount blades on the hub, then the blades can be securely attached, but the production cost increases
Solution Approach 1:
The patent removes the unnecessary clamping structure and its associated second contact surface, keeping only the essential single contact surface for blade attachment. This extraction eliminates complex manufacturing requirements and reduces production costs while maintaining sufficient blade attachment security through the simplified structure.
Solution Approach 2:
The patent adopts a simpler, more cost-effective mounting structure that replaces expensive multi-surface clamping mechanisms with a single contact surface design. This approach uses fewer materials and manufacturing steps, reducing production costs while achieving the necessary functional requirements for blade attachment.
3Strength
If a clamping structure is used to mount blades on the hub, then the blades can be firmly held, but the device complexity increases
Solution Approach 1:
The patent extracts and removes the complex clamping structure, retaining only the essential single contact surface for blade mounting. This simplification eliminates unnecessary components and structural complexity while maintaining adequate blade holding force through the streamlined design.
Solution Approach 2:
Instead of using a complex clamping structure that grips the blade from multiple surfaces, the patent inverts the approach by using a single contact surface design where the blade root interfaces directly with the hub. This inversion simplifies the overall structure while achieving the same functional outcome of secure blade attachment.
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
This design simplifies mold adjustment, reduces production costs, and enhances the reliability of the folding propeller by distributing forces effectively during operation, ensuring dynamic balance and stability.
Implementation Method 1
the friction between two contact surfaces of the blade and the clamping structure needs to be adjusted
Implementation Method 2
the protruding edge is overlapped on the boss. When the folding propeller rotates at a high speed, the force borne by the end of the blade connected to the hub can be distributed to the hub through the protruding edge and the boss
Data Source
AI summary
Embodiments of the present application relate to the technical field of propellers, and particularly to a folding propeller, a power component and an unmanned aerial vehicle. The folding propeller includes a hub, at least two blades and at least two connecting pieces, the hub being configured to mount the folding propeller to a driving device. The hub includes a first surface and a second surface disposed oppositely, the first surface facing the driving device, and the second surface facing away from the driving device. Each of the blades is mounted on the second surface by the corresponding connecting piece, and each of the blades is capable of rotating relative to the hub. In the above manner, according to the embodiments of the present application, during mold adjustment in injection molding, a rotary damping between the blade and the hub can be adjusted by only adjusting the friction force of one contact surface, which is convenient for mold adjustment, is beneficial to mass production and reduces the production cost.