Torque Warning Hand Tool with Segmented LED Alerts
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Solution Overview
Problem
Conventional torque wrenches provide rough and early warnings, leading to operator misjudgment of reaching the desired torque value, due to large warning ranges and inertia-related torque value overshooting.
Innovation Solution
A torque warning hand tool with a precise warning system, utilizing a torque detector, control display device, and warning unit with defined warning modes (96%–99%, 99%–104%, and 104%–110% of the preset value) and colored light sources, along with a critical mode that suppresses light and sound to indicate when the torque is about to exceed the preset value, ensuring accurate and timely operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If conventional wrenches use a rough warning range to indicate approaching preset torque, then the operator receives early warning, but the warning range is too large causing the operator to focus too early and become less attentive
Solution Approach 1:
The patent divides the warning range into multiple segmented zones: a first warning range (90-95% of preset torque), a second warning range (95-100% of preset torque), and a third warning range (100-105% of preset torque). Each zone triggers different warning intensities, allowing progressive alerting without overwhelming the operator too early while maintaining precise notification near the target torque value.
2Ease of operation
If conventional wrenches provide warning at a fixed threshold, then the warning system is simple, but it does not account for operator reaction time and torque value overshooting
Solution Approach 1:
The patent implements preliminary action by providing progressive warnings before the preset torque is reached. The first warning range (90-95%) alerts the operator in advance, the second warning range (95-100%) provides closer notification, and the third warning range (100-105%) indicates overshooting. This staged approach gives the operator time to react and adjust, preventing torque overshooting due to reaction delay.
3Measurement precision
If conventional wrenches use a single warning threshold, then the system is easy to implement, but it causes operator misjudgment of when the desired torque is reached
Solution Approach 1:
The patent applies local quality by assigning different warning characteristics to different torque ranges. The first warning range uses a first warning mode with lower intensity, the second warning range uses a second warning mode with higher intensity or different pattern, and the third warning range uses a third warning mode indicating overshooting. This localized differentiation helps the operator precisely judge the current torque status and make accurate decisions.
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 tool provides a precise and effective warning, allowing operators to accurately judge when the desired torque is reached, reducing misjudgment and torque overshooting, and enabling instantaneous reflective operation to maintain precise torque control.
Implementation Method 1
The torque detector is used to detect the bending strain of the main body and output a torque value
Implementation Method 2
The warning unit has a first warning mode, a second warning mode and a third warning mode and three colored light sources with different colors corresponding to the warning modes respectively
Data Source
AI summary
A torque warning hand tool includes a main body with one drive head, and a torque detector, a control display device and a warning unit disposed on the main body and electrically connected to each other. The control display device is used to set a preset value and receive a torque value from the torque detector to compare the torque value with the preset value. The warning unit has a first, a second and a third warning modes respectively corresponding to three colored light sources. After compared, according to the warning mode in which the torque value falls, the control display device drives the different colored light sources to emit corresponding colors for an operator to identify the torque extent applied to the hand tool.