Core-Shell Chain Roller Structure for Lower Wear and Friction
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Solution Overview
Problem
Roller chains experience wear and friction issues due to interaction with sprockets, requiring high-performance materials that are not adequately addressed by existing designs.
Innovation Solution
A core-shell structured roller composed of a shell roller part and a core roller part, where the core is positioned concentrically within the shell, with snap fittings for assembly and made from plastic materials with glass fibers, reducing stress and wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a single-material roller is used, then the structure is simple, but it cannot simultaneously achieve high strength and low friction/wear resistance
Solution Approach 1:
The roller is constructed as a composite structure with a metal core providing strength and a plastic shell providing wear resistance and low friction. This composite material approach allows each material to contribute its superior properties, resolving the contradiction between strength and wear resistance that cannot be achieved with a single material.
Solution Approach 2:
The roller is divided into two distinct segments: a metal core and a plastic shell. This segmentation allows each part to be optimized independently for its specific function - the core for structural strength and the shell for surface performance - thereby achieving both high strength and wear resistance simultaneously.
2Reliability
If high-performance materials are used to reduce wear, then wear resistance improves, but manufacturing complexity and cost increase
Solution Approach 1:
The plastic shell is formulated with wear-resistant additives and reinforced with glass fibers to achieve high wear resistance. This composite material approach provides excellent surface performance while maintaining ease of manufacturing through conventional plastic molding processes, avoiding the complexity of machining or treating metal surfaces.
Solution Approach 2:
The plastic material parameters are optimized by incorporating specific additives and fillers to enhance wear resistance. By changing the material composition parameters rather than using complex metal alloys or surface treatments, the invention achieves high wear resistance while maintaining manufacturing simplicity.
3Adaptability or versatility
If the roller is made as a single integrated part, then assembly is simple, but material selection is limited
Solution Approach 1:
The roller is segmented into a metal core and plastic shell that can be manufactured separately and then assembled. This segmentation enables the selection of different materials for each part based on their specific functional requirements, while the assembly process is simplified through design features such as interference fits or mechanical fastening elements.
Data Source
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AI summary
The invention relates to a roller for a chain which is constructed by a shell roller part and a core roller part, wherein the shell roller part comprises a first outer cylinder, a first inner cylinder which is positioned concentrically inside the first outer cylinder, and a bottom which is positioned at and connected to one end of the first inner cylinder and the first outer cylinder; and wherein the bottom is stretched from the first inner cylinder to the first outer cylinder; wherein the core roller part comprises a second outer cylinder, a second inner cylinder which is positioned concentrically inside the second outer cylinder, and a top which is positioned at and connected to one end of the second inner cylinder and the second outer cylinder; and wherein the top is stretched from the second inner cylinder to the second outer cylinder; wherein the core roller part is positioned concentrically in the space surrounded by the first inner cylinder, the first outer cylinder and the bottom.