Fan Bearing Bracket Composite Metal Plastic Bushing
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Solution Overview
Problem
Conventional fans with metal bushings are costly and lack structural rigidity, which affects the reliability and lifespan of electronic products due to excessive heat dissipation needs.
Innovation Solution
A bearing bracket with a metal base and injection-molded plastic bushing, featuring an opening and reinforcing parts, integrated with an anti-vibration member, reduces costs while enhancing structural rigidity and vibration absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal bushing is used to connect with the metal base, then the structural strength is improved, but the manufacturing cost increases
Solution Approach 1:
The patent combines metal and plastic materials in a composite structure. The metal base provides structural strength and rigidity, while the plastic bushing provides bearing functionality and reduces cost. This composite approach resolves the contradiction by using each material for its optimal function rather than using expensive metal throughout.
Solution Approach 2:
The patent replaces expensive metal bushings with cheaper plastic bushings that are sufficiently durable for the application. The plastic bushing is designed to be cost-effective while maintaining adequate service life, accepting that it is not as durable as metal but is economically superior for the intended use.
2Ease of manufacture
If a plastic bushing is used instead of metal, then the manufacturing cost is reduced, but the structural rigidity deteriorates
Solution Approach 1:
The composite structure of metal base with plastic bushing maintains overall structural rigidity through the metal framework while using plastic only for the bearing portion where cost reduction is prioritized. The metal base provides the necessary rigidity and stability for the overall assembly.
Solution Approach 2:
The patent applies different material properties to different parts of the assembly. The metal base requires high rigidity and strength, so it is made of metal. The bushing portion requires bearing functionality and cost-effectiveness, so it is made of plastic. Each part has the local quality needed for its specific function.
3Stability of the object's composition
If reinforcing parts are added to the metal base, then the structural rigidity is improved, but the device complexity increases
Solution Approach 1:
The reinforcing parts are integrated into the metal base as a single piece through injection molding or forming processes. This merging of the reinforcing structure with the base eliminates the need for separate reinforcement components and assembly steps, reducing device complexity while maintaining structural rigidity.
Solution Approach 2:
The reinforcing parts are designed into the metal base structure during the initial manufacturing process rather than being added later. This preliminary integration ensures structural rigidity is built-in from the start, avoiding subsequent complex assembly operations.
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
The solution provides a cost-effective and rigid fan structure that efficiently dissipates heat, reduces noise, and increases assembly tolerance, making it suitable for various devices with lower design and manufacturing costs.
Implementation Method 1
The bushing is integrally formed with the metal base by injection molding
Implementation Method 2
The anti-vibration member is made of plastic or rubber, and is annular, curved or polygonal. The radial portion of the metal base further comprises at least one through hole or a blind hole, and the anti-vibration member extends into the through hole or the blind hole
Data Source
AI summary
A bearing bracket including a metal base and a bushing is provided. The metal base has an opening at its central portion. The bushing of the bearing bracket is made of plastic. The bushing encloses an axial portion or/and a radial portion of the metal base by injection molding. Furthermore, the bearing bracket further includes an anti-vibration member disposed on at least one side surface of the metal base.