Fan Assembly Stator Fixation via Bushing Hook
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Solution Overview
Problem
The use of copper bushings in fans requires an adhesive to fix the stator, increasing assembly time and cost, and as copper prices rise, this burden on manufacturers grows, necessitating a more efficient fixation method.
Innovation Solution
A fan assembly design featuring a bushing with a hook that extends into the stator, allowing a bearing to press against the hook and pivotally connect the rotor, eliminating the need for adhesive by securely fixing the stator without it.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive is used to fix the stator on the copper bushing, then the stator can be securely fixed, but assembly time and cost increase
Solution Approach 1:
The invention extracts and eliminates the adhesive from the fixation system by replacing it with a pure mechanical interlocking structure consisting of the hook extending into the bushing cavity and the bearing pressing against the hook, thereby reducing assembly steps and cost while maintaining secure fixation
Solution Approach 2:
The invention replaces the chemical bonding mechanism (adhesive) with a mechanical interlocking mechanism (hook extending into cavity and bearing pressing against hook), achieving secure fixation through physical structure rather than chemical bonding, which eliminates assembly time and cost associated with adhesive application
2Reliability
If copper bushing is used for high strength and heat dissipation, then fixation security is improved, but manufacturing cost increases due to rising copper prices
Solution Approach 1:
The invention replaces the expensive copper bushing with a more cost-effective plastic bushing that incorporates a cavity for the hook structure, achieving the necessary fixation security through the mechanical interlocking design while significantly reducing material cost in response to rising copper prices
Solution Approach 2:
The invention changes the material parameter from copper to plastic for the bushing, and simultaneously changes the structural parameter by incorporating a cavity into the bushing design, thereby achieving cost reduction while maintaining fixation security through the alternative mechanical interlocking mechanism
3Reliability
If adhesive is used between copper bushing and stator, then stator fixation is achieved, but assembly complexity and cost increase
Solution Approach 1:
The invention extracts and removes the adhesive from the assembly process, replacing it with a pure mechanical interlocking system where the hook extends into the bushing cavity and is pressed by the bearing, thereby simplifying the assembly process and reducing complexity while achieving reliable stator fixation
Solution Approach 2:
The invention substitutes the chemical bonding system (adhesive) with a mechanical interlocking system (hook and cavity), eliminating the need for adhesive application steps and reducing assembly complexity while maintaining secure stator fixation
Data Source
AI summary
A fan assembly includes a bushing, a stator, a first bearing, and a rotor. The stator surrounds the bushing, and includes at least one hook. The hook extends into the bushing. The first bearing is disposed in the bushing and presses against the hook. The rotor is pivotally connected to the first bearing.