Fan Module Segmented Rotor Assembly Alignment
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Solution Overview
Problem
The existing fan blade rotor manufacturing process via injection molding faces demolding challenges and structural design limitations due to reduced space in electronic devices, making it difficult to achieve accurate alignment and concentricity of fan blades.
Innovation Solution
The fan module is designed with a hub and separate bodies that include ribs, bosses, and alignment portions to facilitate demolding and assembly, ensuring accurate alignment and concentricity through the use of ribs on the inner wall of the second body and bosses on the first body, allowing for improved assembly accuracy and structural design flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the fan blade rotor is manufactured by injection molding as a single piece, then production cost is reduced, but demolding problems occur and structural design is limited
Solution Approach 1:
The fan blade rotor is divided into multiple independent fan bodies (first fan body, second fan body, third fan body) that can be manufactured separately and then assembled. Each fan body can be independently molded without demolding problems, and the multiple fan bodies are connected to form the complete rotor structure with blades positioned between them.
2Device complexity
If the fan blade rotor is divided into multiple separate fan bodies, then demolding problems are solved and structural design flexibility is improved, but assembly alignment accuracy becomes difficult to ensure
Solution Approach 1:
Alignment portions are provided on each fan body that serve as intermediary elements to ensure accurate relative positioning during assembly. These alignment portions guide the fan bodies to fit together precisely, ensuring that the blades are correctly positioned and the rotor is balanced.
Solution Approach 2:
The alignment portions are pre-formed on each fan body during their respective manufacturing processes. This preliminary preparation of alignment features ensures that when assembly occurs, the fan bodies can be quickly and accurately positioned relative to each other without requiring complex alignment procedures.
3Weight of moving object
If electronic products are made lighter and thinner, then product portability is improved, but the space for installing fans and dissipating heat is reduced
Solution Approach 1:
The multiple fan bodies are nested or stacked along the rotation axis direction, with blades positioned between adjacent fan bodies. This nested arrangement allows the fan rotor to achieve an effective heat dissipation volume without increasing the overall footprint area, enabling compact integration into thin electronic devices while maintaining adequate heat dissipation capacity.
Data Source
AI summary
A fan module includes a hub, a first body and a second body. The hub is configured to rotate along a central axis. The first body is connected to an outer wall of the hub. The second body is sleeved on the outer wall of the hub. The second body includes a plurality of ribs. The ribs are disposed on an inner wall of the second body and abut against the outer wall of the hub.