Cable Pull-Off Clamping Jaws With Progressive Tooth Depths
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Solution Overview
Problem
Existing pull-off force measuring devices often damage cable bodies during testing due to the concentration of tensile forces in small areas, leading to inaccurate or falsified measurements.
Innovation Solution
A pull-off force measuring device with clamping jaws featuring teeth of varying depths, which distribute the tensile stress more evenly across the cable body, preventing overloading and damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If clamping jaws with uniform teeth depth are used to securely hold the cable body, then the cable body is firmly clamped, but the tensile force is concentrated in small areas causing damage to the cable body
Solution Approach 1:
The clamping teeth are designed with varying depths instead of uniform depth. The first clamping tooth has a smaller depth to reduce local stress concentration, while subsequent teeth have progressively greater depths. This local variation in tooth depth distributes the tensile force more evenly across the cable body, preventing damage while maintaining secure holding.
2Force
If large clamping force is applied to prevent cable slippage, then the cable body is held securely, but the cable body is damaged due to force concentration
Solution Approach 1:
The clamping teeth exhibit local quality variation through progressive depths. The first tooth applies smaller clamping force to avoid damage, while subsequent teeth apply progressively larger forces. This distributes the total clamping force across multiple locations with different magnitudes, preventing cable body damage while achieving secure holding.
Solution Approach 2:
The clamping force is segmented into multiple discrete applications through the series of clamping teeth rather than a single large force. Each tooth contributes a portion of the total clamping force, with the first tooth applying a reduced force to protect the cable body from damage.
3Productivity
If conventional clamping systems are used to hold the cable body during pull-off force measurement, then the measurement can be performed, but the cable body is damaged and cannot be reused
Solution Approach 1:
The varying tooth depths create local quality differences in the clamping action. The first tooth with smaller depth protects the cable body from damage during the measurement process, allowing the cable body to be reused for subsequent measurements, thereby reducing material loss.
4Device complexity
If clamping teeth with uniform depth are used, then the clamping structure is simple, but the tensile stress is not evenly distributed causing cable damage
Solution Approach 1:
The clamping teeth are designed with local quality variation through progressive depths. This increases the device complexity slightly but significantly improves stress distribution reliability by ensuring even distribution of tensile stress across the cable body, preventing damage.
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 device securely holds the cable body with progressive tooth depths that balance the load, reducing the risk of cable damage and ensuring accurate measurements.
Implementation Method 1
The friction of the cable body on the cylinder surface reduces the required holding force on the clamping jaws
Data Source
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AI summary
The invention relates to a pull-off force measuring device comprising a holding device for holding a functional part of a cable connection, and a clamping device with at least two clamping jaws for clamping a cable body of the cable connection, wherein a first clamping jaw has at least two clamping teeth which have different depths.