Ceiling Fan Blade Support Structure for Hub Load Relief
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Solution Overview
Problem
Conventional ceiling fans suffer from structural weakness due to heavy blades being supported by a hub, leading to loose or deformed connections between the hub and sleeve, resulting in a short service life.
Innovation Solution
A ceiling fan design featuring a loading plate with a radial extending portion that directly couples with the blades, reducing the weight burden on the hub and enhancing structural stability through increased contact area and clamping mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the hub supports the total weight of the blades, then the blades can be large and heavy for sufficient air-driving effect, but the interconnected part between the hub and sleeve comes loose or deformed after long term use
Solution Approach 1:
The patent divides the support function into two separate components: the hub supports only the rotor weight, while the loading plate supports the blade weight. This segmentation of support functions prevents the hub from bearing excessive weight that would cause connection failure, thereby resolving the contradiction between using heavy blades for air-driving effect and maintaining structural reliability.
2Duration of action of moving object
If the hub supports heavy blades through screwing or tenoning, then the blades can be large for sufficient air-driving effect, but the service life of the ceiling fan becomes short due to loose or deformed connections
Solution Approach 1:
The patent segments the weight support function so that the loading plate specifically supports the blade weight through its bearing connection with the shaft, while the hub only supports the rotor. This prevents the hub connections (screwing or tenoning) from being subjected to excessive weight, thereby extending the service life by preventing loose or deformed connections.
Solution Approach 2:
The loading plate acts as an intermediary component between the shaft and the blades. It provides a dedicated support structure that bears the blade weight, preventing this weight from being transmitted to the hub connections. This intermediary structure resolves the contradiction by protecting the hub connections from excessive load while still allowing heavy blades to be used.
Data Source
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AI summary
A ceiling fan is designed with enhanced structural strength and prolonged service life. The ceiling fan comprises a stator (1), a loading plate (2), a rotor (3) and a plurality of blades (4). The stator (1) includes a shaft (11). The loading plate (2) is rotatably connected to the shaft (11) and includes a radial extending portion (22). The rotor (3) includes a hub (31) coupled with the loading plate (2). The plurality of blades (4) is coupled with the radial extending portion (22). An overlap between each of the plurality of blades (4) and the radial extending portion (22) has a length (L) in the extending direction. The length (L) is larger than a distance (D) between a midpoint (311a) and an outer periphery of a top wall (311) of the hub (31).