Silent Chain Link Plate Geometry for Lower Tension and Higher Strength
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Solution Overview
Problem
Existing silent chain systems suffer from low strength due to high tension on the tension side, particularly when compared to monotype silent chains.
Innovation Solution
A silent chain system comprising link plates of different shapes, designed to have pitch lines at the same height when engaged with sprockets, which reduces maximum tension and enhances chain strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If link plates of different shapes are used to reduce tension, then chain strength is improved, but chain complexity increases
Solution Approach 1:
The patent applies local quality by using different link plate shapes (first link plates with larger inner flank angles and second link plates with smaller inner flank angles) at different positions in the chain. This allows each link plate type to be optimized for its specific function: first link plates reduce tension on the tension side, while second link plates maintain engagement stability on the slack side, thereby improving overall chain strength without requiring complete redesign of all link plates
Solution Approach 2:
The chain is segmented into different types of link plates (first and second link plates) with distinct geometries. This segmentation allows the chain to handle different mechanical conditions at different locations, with the first link plates addressing tension side requirements and second link plates addressing slack side requirements, thus resolving the contradiction between strength improvement and complexity increase
2Stability of the object's composition
If randomized link plate arrangement is used, then engagement stability is improved, but tension increases
Solution Approach 1:
The patent improves engagement stability while reducing tension by applying local quality through differentiated link plate designs. First link plates with larger inner flank angles are positioned to reduce tension on the tension side, while second link plates with smaller inner flank angles are positioned to maintain stable engagement on the slack side. This localized optimization resolves the contradiction by addressing stability and tension requirements at their respective locations rather than using a uniform design
Data Source
AI summary
To provide a high-strength silent chain and a chain drive system. The silent chain is made up of a plurality of link plates pivotably coupled together with connecting pins. The plurality of link plates include two or more types of link plates having different shapes. The link plates of different shapes are designed to have pitch lines at the same height when the link plates sit on a sprocket. The chain drive system includes this silent chain.