Ceiling Fan Mounting Bracket Stress Distribution via Pivot Coupling
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Solution Overview
Problem
Conventional ceiling fan hanger assemblies experience stress concentration and failure due to external forces, leading to premature wear and high failure rates, particularly because the existing mounting brackets concentrate stress and cause the fan to shake during operation, and the lead wires can become twisted and damaged.
Innovation Solution
A novel mounting bracket design featuring two lateral walls with receiving portions that allow the coupling rod to pivot, distributing stress and preventing concentration, while also incorporating features like blind holes and wire grooves to secure the coupling rod and lead wires, reducing friction and wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If bracket-coupling portion is coupled with mounting bracket via rounded face to prevent breaking under external force, then stress concentration is reduced and component breaking is prevented, but the coupling rod pivots under torque during operation causing shaking and lead wire twisting
Solution Approach 1:
The patent introduces a coupling rod as an intermediary component between the bracket-coupling portion and the mounting bracket. The coupling rod acts as a mediator that transmits forces while preventing direct stress concentration on the bracket-coupling portion, thereby resolving the contradiction between strength and reliability
Solution Approach 2:
The patent segments the coupling system into distinct components: the mounting bracket with receiving portions, the coupling rod, and the bracket-coupling portion. This segmentation allows each component to be optimized independently, with the coupling rod specifically designed to handle torque without causing shaking or lead wire twisting
2Stability of the object's composition
If coupling rod is rigidly fixed to mounting bracket to prevent shaking during operation, then stability is improved, but stress concentration occurs at connection points leading to component breaking
Solution Approach 1:
The patent applies dynamics by allowing the coupling rod to rotate freely within the receiving portions of the mounting bracket. This dynamic capability enables the system to adapt to operational torques while maintaining stability, preventing both shaking and stress concentration through controlled movement rather than rigid fixation
Data Source
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AI summary
A mounting bracket (1) of a hanger assembly of a ceiling fan is designed with a lower failure rate. The mounting bracket (1) has two lateral walls (11) opposing to each other in a first direction (Y). Each of the two lateral walls (11) includes a mounting end (12) and a hanger end (13) that are spaced from each other in an axial direction (X) perpendicular to the first direction (Y). Each of the two lateral walls (11) further comprises a receiving portion (14). The receiving portions (14) of the two lateral walls (11) are adapted to receive a coupling rod (2).