Foldable Ceiling Fan Blade Assembly with Spiral Spring Mechanism
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Solution Overview
Problem
Conventional ceiling fan blade assemblies are bulky and require disassembly for packing and delivery, leading to potential improper assembly and safety hazards due to accidental blade detachment.
Innovation Solution
A foldable and expandable blade assembly design featuring a mounting arm with a split boss, a cover with a spiral spring, and a blade securely fastened with screws, allowing for compact storage and enhanced airflow through adjustable blade angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the blade member is rigidly mounted on the mounting arm, then the blade assembly provides stable structural support, but the total volume becomes huge requiring disassembly for packing and delivery
Solution Approach 1:
The blade assembly incorporates a folding mechanism that allows the blade member to transition between an extended operational position and a retracted storage position. The mounting structure includes movable connections between the blade member, cover, and mounting arm that enable the assembly to collapse into a compact configuration for packing while maintaining structural integrity during operation.
2Stability of the object's composition
If the blade member is rigidly mounted on the mounting arm, then the blade assembly maintains fixed structure, but improper assembly may cause the blade member to accidentally loosen and result in damages
Solution Approach 1:
The blade assembly is divided into separable components including the blade member, cover, mounting arm, and retaining elements. Each component can be independently assembled and disassembled through standardized interfaces. The retaining portion with constricted portion and resilient engaging plug provide positive locking that prevents accidental loosening while allowing controlled assembly and disassembly for maintenance.
3Volume of moving object
If the blade assembly is designed for compact storage, then the volume is reduced for packing, but the blade structure must be foldable which adds complexity
Solution Approach 1:
The folding blade assembly employs a nested configuration where the blade member can be positioned within the envelope formed by the cover and mounting arm when retracted. The compacted blade stores inside the hollow space of the mounting structure, minimizing external dimensions. The spiral spring provides the mechanical energy storage needed for the folding action without adding significant external complexity.
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 design enables compact storage and secure assembly, reducing assembly risks and enhancing airflow by allowing blades to fold and expand with motor operation, thereby improving safety and efficiency.
Implementation Method 1
a spiral spring mounted on the cover... The spiral spring has one end sleeved on the at least one boss of the cover and the other end engaged with the split
Data Source
AI summary
A blade assembly for a ceiling fan includes a mounting arm, a bearing, a cover, a spiral spring, a blade, and three screws. The mounting arm has a plate. The plate has a boss. The boss has a split. The bearing is sleeved on the boss. The cover has a stub. The stub has a receiving recess for receiving the bearing. The cover has a through hole for passing the boss. The cover has three bosses. The spiral spring has one end sleeved on the boss of the cover and the other end engaged with the split. The blade has three mounting holes and corresponding to the boss of the cover. The three screws pass through the mounting holes and fasten with the bosses of the cover.