Torque Wrench Measuring Device for Tripping Accuracy

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Solution Overview

Problem

Existing torque wrenches require users to manually calculate an acceptable error range for tripping torque, making it inconvenient and prone to errors when determining if the tripping torque exceeds this range, leading to potential large torque discrepancies.

Innovation Solution

A torque wrench with a measuring device and adjustment mechanism that sets a target torque value and detects whether the tripping torque is within an allowable error range of 0.85 to 1.15 times the target value, sending signals to indicate accuracy, allowing for easy correction without user calculation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the user manually calculates the acceptable error range for tripping torque, then the torque accuracy can be determined, but the operation becomes inconvenient and error-prone

Engineering Contradiction:

Improvetorque accuracy detectionVSAvoiduser operation convenience

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The torque wrench automatically performs the error range calculation and accuracy detection functions that previously required manual user computation. The device self-evaluates whether the tripping torque is within the acceptable range (0.85-1.15 times target torque) and provides automatic feedback, eliminating the need for users to manually calculate and judge torque accuracy.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The device provides automatic feedback through signals (positive or negative) indicating whether the tripping torque is within the allowable error range. This feedback mechanism replaces manual calculation and judgment with automated system response, improving both accuracy detection and operational convenience.

Inventive Principle:

Principle #23Feedback

2Reliability

If the user fails to calculate whether the tripping torque exceeds the error range, then the torque discrepancy can be large, but the user may overlook the correction

Engineering Contradiction:

Improvetorque correction reliabilityVSAvoidcorrection process simplicity

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The automatic feedback signal system ensures that users are immediately notified when torque correction is needed, eliminating the possibility of overlooking corrections. The system reliably indicates when tripping torque is within or outside the acceptable range, ensuring correction reliability without complicating the operation.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The device performs self-diagnosis and automatically determines when correction is needed, reducing reliance on user calculation and judgment. This self-service capability ensures reliable torque correction detection while maintaining simple operation through automatic system assessment.

Inventive Principle:

Principle #25Self-service

3Ease of operation

If the measuring device automatically detects the tripping torque accuracy, then the operation convenience is improved, but the device complexity increases

Engineering Contradiction:

Improveoperation convenienceVSAvoidmeasuring device complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent replaces manual mechanical calculation and judgment with an electronic measuring device that automatically detects torque values and determines accuracy. This substitution of mechanical user operations with electronic automation improves convenience while the integrated design keeps the added complexity manageable within the torque wrench system.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

Enables users to accurately determine and adjust tripping torque values within the allowable range, reducing the likelihood of torque errors and simplifying the correction process.

Implementation Method 1

The sensor, located on one side of the deflection rod, is used to detect the deformation of the deflection rod

Methodology Applied

Scientific EffectDeformation detection: Deformation

Data Source

PatentUS20240308039A1Torque wrench that can detect accuracy of tripping torque and a correction method thereof

Publication Date: 2024.09.19 LAI SHIH HAO

AI summary

A torque wrench capable of detecting the accuracy of tripping torque includes a shaft tube, a drive rod, a tripping mechanism arranged in the shaft tube and connected to the drive rod, an adjustment mechanism arranged in the shaft tube, and a measuring device usable for measuring a torque value that applies to the drive rod connected to the shaft tube. The measuring device is usable for setting a target torque value. The target torque value is based on determining an allowable error range. The allowable error range is in a range of 0.85 times more and 1.15 times less than the target torque value. In a situation where a force is applied to the torque wrench until the tripping mechanism trips, the measuring device obtains a tripping torque value and is usable for detecting whether the tripping torque value is within the allowable error range.