Ceiling Fan Mounting System with Nesting Canopy
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Solution Overview
Problem
Conventional ceiling fan mounting systems weaken under excessive force due to slotted openings that can spread, compromising the structural integrity and stability of the installation.
Innovation Solution
A mounting system featuring a hanger with a slotted ball joint receiving flange and a canopy with a central opening that nests flushly against the hanger flange, preventing the ball joint from spreading under load, and utilizing a deformable ball joint with V-shaped ridges for improved fit and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a slotted mounting bracket is used to support the downrod, then the installation process is simplified and the bracket can accommodate the downrod easily, but the bracket structure weakens under excessive force as the slot may open or spread
Solution Approach 1:
The mounting system is divided into separate functional components: a slotted mounting bracket for easy installation and a separate canopy with a non-slotted reinforcement structure. The bracket provides operational ease during installation while the canopy provides structural strength during operation, resolving the contradiction between ease of installation and structural integrity.
Solution Approach 2:
The canopy acts as an intermediary element between the slotted bracket and the downrod ball joint. It reinforces the connection point without interfering with the bracket's slotted design, allowing the bracket to remain easy to install while the canopy provides the necessary structural support to prevent spreading under load.
2Strength
If the canopy is designed to nest flushly against the hanger flange, then the load holding capacity increases to 800 pounds, but the design complexity increases
Solution Approach 1:
The canopy integrates multiple functions into a single component: it serves as a decorative cover, a structural reinforcement element, and a load-bearing support. By merging these functions, the design achieves high load capacity (800 pounds) without proportionally increasing complexity, as the same structural form fulfills multiple roles.
Solution Approach 2:
The canopy is designed to work in conjunction with the hanger flange and bracket, creating a composite mounting structure. The combination of these components creates a unified load-bearing system that achieves superior strength (800 pounds) while distributing the structural requirements across multiple elements rather than over-complicating a single component.
3Reliability
If the ball joint is made deformable with V-shaped ridges, then the fit and stability improve under vibration and movement, but the manufacturing precision requirements increase
Solution Approach 1:
The ball joint transitions from a rigid, static connection to a dynamic, deformable connection. The V-shaped ridges are designed to deform elastically under load and vibration, allowing the joint to adapt to movement and maintain stability. This dynamic behavior improves reliability while the standardized ridge geometry keeps manufacturing requirements manageable.
Solution Approach 2:
The ball joint's physical parameters (shape, surface geometry with V-shaped ridges) are optimized to balance deformability and manufacturability. The ridge geometry is designed with specific dimensions that allow controlled deformation for improved fit and stability while remaining within standard manufacturing tolerances, avoiding excessive precision requirements.
Data Source
AI summary
A ceiling fan mounting system (10) is disclosed which includes an upper pre-mounted assembly (12) and a lower hanging assembly (13). The upper pre-mounted assembly includes a mounting plate (14) with a peripheral flange (16) having threaded mounting holes (17) therein. The upper assembly also includes a hanger (21) coupled to the mounting plate and having a stepped ball holding flange (23) with a beveled interior facing surface (24). The lower hanging assembly includes a downrod (29) coupled to a ball joint (31) and a canopy (32). The ball joint is configured to be received within the hanger ball holding flange and has a series of deformable ridges (33). The canopy includes a central opening defined by a central, stepped flange (35) adapted to receive and nest flushly against the exterior of the hanger ball holding flange. The canopy stepped flange fits flushly against the exterior of the hanger ball holding flange so as to encircle the C-shaped holding flange.