Oil-Retaining Bearing Fixation via Segmented Mating Sections
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Solution Overview
Problem
Conventional cooling fans with oil-retaining bearings face issues such as noise and clogging due to the difficulty in controlling the glue dispensing process, and the press fit method can affect the normal operation and assembly of the shaft.
Innovation Solution
The fan device incorporates a base seat with a central tubular section and a bearing cup, featuring mating sections that securely position the oil-retaining bearing through a press fit, preventing shaft compression and glue flow into the shaft hole, thus ensuring stable operation and assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the oil-retaining bearing is fixed by glue dispensing process, then the bearing is secured in the bearing cup, but the glue may flow into the shaft hole causing noise and clogging
Solution Approach 1:
The bearing cup is divided into two functional zones: a bearing retention section with a larger diameter that securely holds the oil-retaining bearing, and a shaft hole section with a smaller diameter that prevents glue from reaching the shaft hole. This segmentation creates a physical barrier that eliminates the harmful effect of glue flow while maintaining bearing fixation reliability.
2Reliability
If the oil-retaining bearing is tightly fitted into the bearing cup by press fit, then the bearing is securely fixed, but the shaft hole contracts compressing the shaft and affecting normal assembly and operation
Solution Approach 1:
The bearing cup structure is segmented into a bearing retention section with a first diameter designed for press fit fixation, and a shaft hole section with a second diameter that is larger than the shaft diameter. This segmentation allows the press fit to be applied only to the bearing outer circumference while the shaft hole remains sufficiently large to accommodate the shaft without compression, enabling normal assembly and operation.
Solution Approach 2:
Different sections of the bearing cup are given different local qualities: the bearing retention section has a smaller diameter to provide tight press fit fixation for the bearing, while the shaft hole section has a larger diameter to ensure easy shaft assembly and operation. This local differentiation resolves the contradiction between secure fixation and ease of operation.
3Device complexity
If the bearing cup has uniform diameter throughout, then the structure is simple, but cannot simultaneously secure the bearing and allow smooth shaft operation
Solution Approach 1:
The bearing cup is segmented into two distinct sections with different diameters: the bearing retention section with a first diameter for secure bearing fixation, and the shaft hole section with a second diameter for smooth shaft operation. This segmentation increases structural complexity slightly but dramatically improves reliability by simultaneously achieving both secure bearing fixation and smooth shaft operation, which cannot be accomplished with a uniform diameter structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design securely positions the oil-retaining bearing, preventing operational issues related to press fit and glue dispensing, enhancing the fan's lifetime and reducing assembly costs while maintaining smooth shaft operation.
Implementation Method 1
the bearing cup has a bearing hole. The oil-retaining bearing is retained in the bearing hole
Data Source
AI summary
A fan device with oil-retaining bearing includes a base seat and an oil-retaining bearing. The base seat has a central tubular section and a bearing cup extending from the central tubular section to one side. The bearing cup has an internal bearing hole. The central tubular section has at least one mating section in adjacency to the bearing hole. The oil-retaining bearing is disposed in the bearing hole. The oil-retaining bearing has at least one connection section mated with the mating section. The connection section and the mating section are mated with each other so that the oil-retaining bearing is securely disposed in the bearing hole. In addition, the operation of the shaft will not be affected due to the press fit and the difficulty in controlling the glue dispensing process.