Chain Link Marking for Wear Detection

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing methods for determining wear in pin, bushing, or roller chains require multiple steps and specialized devices, making them cumbersome and inefficient.

Innovation Solution

A marking is applied to the chain's inner plates to indicate elongation, allowing users to visually assess wear by comparing the distance between tabs, with the marking becoming visible when the chain has reached a critical wear level, indicating replacement is necessary.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If gauges are used to determine chain wear from the outside, then measurement reliability is improved, but device complexity and number of steps increase

Engineering Contradiction:

Improvewear detection accuracyVSAvoidnumber of measuring devices

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The chain itself provides the measurement function through the marking on the link plate. The marking serves as both the object being measured and the measuring reference, eliminating the need for external gauges. The user simply observes whether the marking is visible to determine wear status.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The measurement function is extracted from the external gauge and integrated directly into the chain structure through the marking. Only the essential visual indication remains, while complex measuring devices are eliminated.

Inventive Principle:

Principle #2Taking out (Extraction)

2Measurement precision

If multiple steps are required to determine chain elongation, then measurement precision is improved, but ease of operation deteriorates

Engineering Contradiction:

Improveelongation detection accuracyVSAvoidwear detection simplicity

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The chain provides its own wear indication through the marking visibility. The user performs a single visual check to determine both presence and degree of wear, combining multiple measurement functions into one simple operation.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

Instead of measuring wear and then determining if it exceeds limits, the system inverts the approach by directly indicating whether wear limits are exceeded through marking visibility. The marking is designed to be visible only when wear reaches critical levels.

Inventive Principle:

Principle #13The other way round (Inversion)

3Measurement precision

If specialized measuring devices are used, then measurement precision is improved, but ease of operation deteriorates

Engineering Contradiction:

Improvewear measurement accuracyVSAvoiddetection simplicity

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The chain itself serves as the measuring device through the marking. No external specialized tools are needed; the user's visual observation capability is sufficient to detect wear by checking marking visibility.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

Complex mechanical measuring devices are replaced with a simple visual indication system. The marking transforms the wear measurement function from a mechanical measurement process to a visual observation process.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentEP3926206B1Lug of a pin, bushing or roller chain

Publication Date: 2024.12.25 REXNORD KETTE GMBH & CO KG

Figure 1a~2b
Figure 3a~5

AI summary

The invention relates to a link of a bolt, bushing or roller chain, wherein the link has two through-openings for a bolt each and the through-openings are formed between two base surfaces of the link, wherein a marking indicating a distance is provided on at least one base surface.