Bearing Sleeve Support Structure for Low-Vibration Fan Assembly
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Solution Overview
Problem
The existing bearing assembly for tower fans requires high machining accuracy of cylindrical surfaces, leading to potential vibration issues and increased production costs due to precise fitting requirements.
Innovation Solution
A bearing assembly with a supporting structure, including ribs and axial limiting features, that ensures proper alignment and contact between the bearing and sleeve, reducing the need for precise machining and facilitating easier assembly, while a buckle structure integrates with the housing for secure mounting without separate assembly steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the two cylindrical surfaces of the bearing and bearing sleeve are designed to contact in a fitting manner, then the bearing assembly can operate smoothly, but the machining accuracy requirement becomes excessively high
Solution Approach 1:
The contact surface between the bearing and bearing sleeve is segmented into multiple localized contact points through the supporting structure (protrusions or recesses), rather than requiring continuous surface contact. This segmentation allows each contact point to be less precise while collectively providing stable support, thereby reducing the overall machining accuracy requirement while maintaining reliable operation.
Solution Approach 2:
The supporting structure (protrusions or recesses) acts as an intermediary element between the bearing and bearing sleeve, mediating the contact relationship. Instead of requiring direct high-precision contact between the cylindrical surfaces, the supporting structure provides a tolerance-absorbing interface that ensures proper alignment and contact while accommodating manufacturing variations.
2Stability of the object's composition
If high machining accuracy is required for the cylindrical surfaces, then proper alignment is achieved, but production cost and manufacturing complexity increase
Solution Approach 1:
The alignment function is segmented from the cylindrical surface fit and transferred to the supporting structure (protrusions or recesses). These discrete features are easier to manufacture with standard tolerances compared to requiring high-precision cylindrical surfaces, thereby reducing manufacturing complexity and cost while maintaining proper alignment.
Solution Approach 2:
The design changes the critical alignment parameters from the cylindrical surface dimensions to the dimensions and positions of the supporting structure features. This parameter transformation allows using more economical manufacturing processes for the supporting structure while achieving the same alignment function, thus reducing overall manufacturing complexity and cost.
Data Source
AI summary
Provided are a bearing assembly, a bearing assembly mounting structure and an air blowing apparatus. The bearing assembly includes: a bearing sleeve including an inner assembling face, and a bearing mounted into the bearing sleeve from an axial side of the bearing sleeve and including an outer assembling face corresponding to the inner assembling face. The inner assembling face and/or the outer assembling face is provided with a supporting structure protruding toward an opposing assembling face and cooperating with the opposing assembling face in a contacting manner, and the supporting structure is symmetrically disposed in a peripheral direction of the assembling face where the supporting structure is located.