Probe Cap with Rolling Bearing Elements for Wear Reduction
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Solution Overview
Problem
Existing coating thickness and surface profile measurement probes face issues with probe tip wear and damage due to direct contact with the substrate, requiring frequent replacement of consumable caps and potential measurement inaccuracies from wear-induced changes in probe tip position.
Innovation Solution
The use of rolling bearing elements at the probe tip or cap, allowing for multi-axial movement and reducing wear, maintains a constant distance from the substrate and minimizes damage, with the option of integral or snap-on caps, and a grip mechanism to ensure accurate alignment and pressure application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a replaceable consumable cap is provided to prevent probe tip wear, then the probe tip durability is improved, but the device complexity increases due to cap replacement monitoring and the measurement precision deteriorates as the cap wears and the probe tip moves closer to the surface
Solution Approach 1:
The patent replaces the sliding frictional contact mechanism with a rolling contact mechanism by incorporating rolling bearing elements (balls or rollers) at the probe tip. This substitution eliminates the wear problem associated with conventional sliding contact while maintaining the protective cap function, thereby preserving measurement precision over extended use.
Solution Approach 2:
The patent changes the physical state of the contact interface from sliding friction to rolling friction by introducing rolling bearing elements. This parameter change fundamentally alters the wear characteristics, reducing wear to negligible levels while maintaining the cap's protective function and the probe tip's positional stability.
2Strength
If a replaceable consumable cap is provided to prevent probe tip damage, then the probe tip strength is improved, but the loss of time increases due to frequent cap replacement and monitoring
Solution Approach 1:
By substituting sliding contact with rolling contact through bearing elements, the patent eliminates the wear mechanism that necessitates frequent cap replacement. This extends the service life of both the cap and probe tip, significantly reducing the time lost to replacements and monitoring.
Solution Approach 2:
The rolling bearing elements enable continuous, wear-free operation of the probe tip and cap assembly. This continuity eliminates the periodic interruptions caused by cap replacement, maintaining uninterrupted measurement capability and maximizing productivity.
3Measurement precision
If a conventional probe tip contacts the substrate directly, then the measurement precision is maintained, but the object-affected harmful factors increase due to substrate marking and damage
Solution Approach 1:
The rolling bearing elements (balls or rollers) serve as intermediary elements between the probe tip and the substrate surface. These intermediaries enable the necessary contact for measurement while distributing the contact forces in a manner that prevents substrate marking and damage, thus protecting the tested object.
Solution Approach 2:
The use of spherical bearing elements (balls) or cylindrical rollers at the probe tip introduces curved contact surfaces that distribute contact forces over a larger area compared to a pointed or flat tip. This curvature reduces contact stress and prevents localized substrate damage while maintaining measurement capability.
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
This solution extends the lifespan of the probe tip, maintains measurement accuracy, and reduces substrate damage by using rolling bearing elements that wear less and allow for precise, continuous measurements without the need for frequent cap replacement.
Implementation Method 1
a probe for measuring a property of a substrate, or a cap for such a probe configured to be disposed at the tip of the probe; wherein the probe or cap comprises a plurality of rolling bearing elements arranged to bear on the substrate to be measured
Data Source
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AI summary
Probes are provided with caps, the caps comprise rolling bearing elements so that the probes can be slid along a surface to be measured, without damaging the surface or wearing away the tip of the probe or a sacrificial cap. The rolling bearing elements can be arranged in a ring around the probe tip, with the plane of the foremost edges of the rolling bearing elements a predetermined distance from the probe tip. The caps can comprise a housing with a grip, to encourage users to grip the cap, which comprises the rolling bearing elements, rather than the probe.