Convex Gear Housing Surface for Drainage and Cleaning
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Solution Overview
Problem
Existing gear housings face challenges in efficiently draining liquids and removing contaminants without the need for drainage channels, while also requiring complex manufacturing processes and being prone to contamination adherence.
Innovation Solution
A gear housing design featuring a surface with convexly curved sections and mounting surfaces, allowing liquids to drain easily and contaminants to be removed without channels, made from stainless steel with a specific roughness value and coated for enhanced cleaning, and manufactured using a refined casting and polishing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If drainage channels are provided on the gear housing surface, then liquid drainage is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The gear housing surface is designed with convex curvature (positive curvature) instead of flat or concave surfaces. This curvature causes liquids to naturally drain off the surface due to gravity and surface tension effects, eliminating the need for additional drainage channels while maintaining effective liquid drainage functionality.
Solution Approach 2:
The drainage function is extracted from the traditional drainage channel structure and integrated directly into the basic surface geometry of the gear housing. The convex surface itself performs the drainage function, removing the need for separate drainage features.
2Ease of manufacture
If the surface is made smooth, then manufacturing is easier, but contaminant removal becomes difficult and adhesive forces increase
Solution Approach 1:
The convex curved surface prevents contaminants from adhering strongly because there are no recesses or flat areas for contaminants to nestle into. The curvature reduces the contact area between contaminants and the surface, making contaminant removal easier while maintaining a relatively simple manufacturing process.
Solution Approach 2:
The surface is designed with specific curvature parameters (radius of curvature between 5-50 mm) that optimize both manufacturability and contaminant removal properties. This parameter optimization allows the surface to be manufactured with standard processes while achieving excellent contaminant release characteristics.
3Adaptability or versatility
If recesses and cavities are created on the surface, then mounting flexibility is improved, but cleaning becomes difficult and contaminants adhere more strongly
Solution Approach 1:
Instead of creating recesses and cavities for mounting purposes, the design uses the convex curved surface combined with strategically placed mounting surfaces. This approach maintains mounting flexibility while avoiding the creation of contaminant-trapping recesses, as the overall convex geometry promotes contaminant removal.
Solution Approach 2:
The surface is divided into different functional zones: convex curved areas for drainage and contaminant removal, and localized flat mounting surfaces for attachment purposes. This local differentiation allows mounting flexibility in specific areas while maintaining the overall convex geometry that prevents contaminant adherence in the majority of the surface area.
4Ease of manufacture
If conventional casting processes are used, then manufacturing is simpler, but removal from mold becomes difficult due to surface geometry
Solution Approach 1:
The convex curved surface geometry facilitates mold removal during casting because the curvature allows the casting to be easily extracted from the mold without getting stuck in recesses or complex geometries. The outward-curving surface naturally releases from the mold walls during the extraction process, improving productivity while maintaining a relatively simple casting process.
Data Source
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AI summary
The invention relates to a transmission housing for a bevel gear transmission, which housing has a surface that consists of sections and surfaces for add-on pieces. The sections are convex along at least one surface curve.