Screw Gauge with Transmission Suppression Section
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Solution Overview
Problem
Conventional screw gauges often result in breakage of the gauge section and the measured object due to excessive load applied in the axially perpendicular direction, especially when inspecting female screws with nominal diameters of 1.4 mm or smaller.
Innovation Solution
A screw gauge design incorporating a transmission suppression section between the input section and the gauge section, which absorbs and redistributes the load, preventing excessive force from being applied to the gauge section and the female screw, using an elastically deformable material to reduce the risk of breakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the gauge section is made rigid to ensure measurement stability, then measurement precision is improved, but the risk of breakage increases when load is applied in the axially perpendicular direction
Solution Approach 1:
The screw gauge is divided into functionally distinct sections: a rigid gauge section for precise measurement and a flexible input section for load absorption. This segmentation allows each part to be optimized for its specific function without compromising the other.
Solution Approach 2:
The input section acts as an intermediary between the operator's hand and the gauge section. It mediates the load by deforming elastically to absorb perpendicular forces while transmitting only the necessary fitting load to the gauge section.
2Strength
If the shaft-like body is made flexible to absorb load, then breakage resistance is improved, but measurement precision deteriorates
Solution Approach 1:
The shaft-like body is segmented into a flexible input section and a rigid gauge section. The input section absorbs load through elastic deformation while the gauge section maintains rigidity for accurate measurement, preventing the flexibility from affecting measurement precision.
Solution Approach 2:
Different sections of the shaft-like body have different mechanical properties: the input section is made flexible with lower rigidity to absorb load, while the gauge section is made rigid with higher rigidity to ensure measurement accuracy. This local differentiation of material properties resolves the contradiction.
3Measurement precision
If the rigidity of the shaft-like body is increased to prevent deformation, then measurement accuracy is improved, but the ease of operation deteriorates due to increased elastic reactive force
Solution Approach 1:
The shaft-like body exhibits local quality differentiation where the input section has lower rigidity to reduce elastic reactive force and improve ease of operation, while the gauge section has higher rigidity to maintain measurement accuracy. This localized variation in mechanical properties resolves the contradiction.
4Adaptability or versatility
If the gauge section is designed for small nominal diameter (1.4 mm or smaller), then adaptability is improved, but the risk of breakage increases due to excessive load transmission
Solution Approach 1:
The input section serves as a protective intermediary between the operator's hand and the fragile gauge section. It absorbs excessive load through elastic deformation, preventing transmission of damaging forces to the small-diameter gauge section and enabling safe inspection of delicate female screws.
Solution Approach 2:
The flexible input section provides beforehand cushioning by absorbing potential excessive loads before they can reach the gauge section. This pre-protection mechanism prevents breakage before it occurs, enabling the use of fragile small-diameter gauge sections.
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 screw gauge effectively suppresses breakage of both the gauge section and the female screw by absorbing and redistributing the load, allowing for safe inspection of smaller diameter female screws without causing overload damage.
Implementation Method 1
The transmission suppression section is made of an elastically deformable material and elastically deforms to absorb transmission of the load applied to the input section in the axially perpendicular direction
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
A screw gauge capable of suppressing breakage of a gauge section and a measured object is provided. A shaft-like screw gauge (1) is manually operated by an operator (W) for inspecting a female screw (6) with nominal diameter of 1.4 mm or smaller, which is formed in a measured object (5), and includes a gauge section (2) which is attached to an end of the screw gauge (1) in an axial direction, and fitted with the female screw (6), an input section (23) for accommodating an input of an external force for fitting the gauge section (2) with the female screw (6), and a transmission suppression section (20) disposed between the input section (23) and the gauge section (2). The transmission suppression section (20) suppresses transmission of a load in an axially perpendicular direction applied to the input section (23) to the gauge section (2).