Ceiling Fan Blade Assembly Using Pressing Plates and Small Molds
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Solution Overview
Problem
Conventional ceiling fans experience unstable blade fixation, leading to vibration and noise during operation, and have high manufacturing costs due to complex assembly and large-sized molds required for threaded cylinders.
Innovation Solution
A ceiling fan design featuring a motor with axially positioned shaft rods, fixed seats with insert holes, and pressing plates with threaded cylinders, allowing for easy and stable blade assembly with fine adjustment capabilities, using shock-proof rings to prevent vibration and utilizing small-sized molds for cost reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If threaded cylinders are formed on the outer circumferential side of the motor using large-sized molds, then the blades can be fixed on the motor, but the manufacturing cost increases and processing becomes difficult
Solution Approach 1:
The invention divides the blade assembly system into separate components: the motor housing and the blade assembly with its own mounting bracket. The threaded cylinders are moved from the motor to the mounting bracket, which is a smaller, more manageable component that can be formed using small-sized molds. This segmentation allows each part to be manufactured independently with appropriate mold sizes, reducing manufacturing cost and complexity while maintaining fixation reliability.
2Reliability
If threaded cylinders are made on the motor outer circumference, then blade assembly is possible, but assembly time increases due to alignment difficulty
Solution Approach 1:
The invention introduces a mounting bracket as an intermediary component between the motor and the blade. This bracket contains the threaded cylinders and provides alignment features (such as positioning holes or guides) that facilitate easy alignment with the blade's mounting holes. The intermediary bracket acts as a mediator that absorbs alignment tolerances and simplifies the assembly process, reducing assembly time while maintaining secure fixation.
3Productivity
If conventional blade assembly structure is used, then blades can be attached to motor, but vibration and noise occur during operation
Solution Approach 1:
The invention incorporates vibration-damping features in the blade assembly structure, such as rubber cushions, elastomeric materials, or dampening elements positioned between the blade and the mounting bracket, or between the bracket and the motor. These cushioning elements are pre-installed to absorb vibrations generated during fan operation, preventing them from transmitting to the motor housing and reducing noise. This beforehand cushioning approach addresses vibration and noise issues before they affect overall system performance.
Data Source
AI summary
A ceiling fan includes a motor and plural blades. The motor has its topside and underside respectively secured with a fixed seat, which has its inner side formed with two protruding edges spaced apart and respectively having a pressing plate fixed thereon. The pressing plates are correspondingly combined with the fixed seats so that the blades can be firmly combined with the fixed seats via the pressing plates. The pressing plates can easily be processed and made by small-sized forming molds, able to lower manufacturing cost, and the blades of this invention can be secured on the motor quickly and stably and driven to rotate smoothly and steadily. Further, during assembly of the blades, fine adjustment can be done to respective assembly structure for overcoming errors caused by tolerance. To sum up, this invention is able to shorten man-hour in assembly, enhance assembly efficiency and increase economic gains.