Double-Crank Contact Inspection for Uniform Pressure Stability
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Solution Overview
Problem
Existing contact inspection devices struggle with reliability in quickly and accurately detecting defects on products during large-scale automated production, particularly in maintaining consistent pressure and contact with inspection targets.
Innovation Solution
A contact inspection device with a double crank structure and oblique movement mechanism, utilizing a driving cylinder and piston rod to apply an oblique force while maintaining horizontality, coupled with a height-adjusting screw for precise terminal positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional driving mechanism is used to move the contact inspection module, then the structure is simple, but the pressure distribution on the inspection target is uneven and reliability is poor
Solution Approach 1:
The patent employs a double crank mechanism that converts rotational motion from the driving cylinder into a dynamic oblique movement trajectory. This dynamic mechanism ensures the contact inspection module approaches the inspection target at an optimized angle while maintaining stable pressure distribution, thereby improving inspection reliability without requiring complex control systems
Solution Approach 2:
The driving cylinder is positioned and oriented to apply force in a specific oblique direction, changing the pressure application parameters. By adjusting the crank angles and connecting rod lengths, the system optimizes the contact force vector to achieve uniform pressure distribution across the inspection target, enhancing reliability through parameter optimization rather than structural complexity
2Productivity
If the contact inspection module moves quickly to improve productivity, then inspection speed increases, but contact stability and pressure consistency deteriorate
Solution Approach 1:
The double crank mechanism provides a controlled dynamic trajectory that allows rapid approach motion followed by a stable contact phase. The mechanism's geometric constraints ensure that even at high speeds, the contact inspection module maintains consistent orientation and pressure application, decoupling speed from stability
Solution Approach 2:
The mechanism design incorporates a controlled deceleration phase through the crank rotation, where the oblique movement naturally reduces speed before contact. This prior cushioning effect ensures that regardless of approach speed, the actual contact occurs with stable, consistent pressure, protecting against speed-induced instability
3Measurement precision
If the inspection terminal contacts the target with high force to ensure detection accuracy, then measurement precision improves, but the risk of damaging the inspection target increases
Solution Approach 1:
The oblique contact mechanism concentrates the inspection force on a specific localized area of the inspection target through the inspection terminal. This localized quality approach allows sufficient force for accurate defect detection while limiting the total force applied, reducing the risk of damage to the overall target structure
Solution Approach 2:
By changing the contact angle through the oblique movement mechanism, the system optimizes the force vector to achieve better detection sensitivity. The oblique angle allows the same contact force to produce more effective detection signal while applying less normal pressure, thereby improving measurement precision without increasing damage risk
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
Enhances the reliability of defect detection by ensuring uniform pressure distribution across inspection targets, improving the accuracy and consistency of contact inspections.
Implementation Method 1
a driving cylinder including a piston rod moving back and forth in an oblique direction, of which one end is coupled to the contact inspection module in a rotatable way
Implementation Method 2
the respective second fasteners may include a bolt and a bearing, the bolt may include a head, a shank coupled to the bearing, and a thread fixed and coupled to the contact inspection module, and the bearing may be coupled to the connecting rod in a rotatable way
Data Source
Figure 1
Figure 2
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AI summary
A contact inspection device according to an embodiment of the present disclosure includes a support; a contact inspection module including an inspection terminal for contacting an target and performing an inspection; a crank module for combining the contact inspection module and the support and having a double crank structure; and a driving cylinder coupled to the support and the contact inspection module and moving the contact inspection module, wherein the driving cylinder pressurizes the contact inspection module in an oblique direction to move the same.