Electro-mechanical Cable Tie Tool with Strain Gauge Feedback
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Solution Overview
Problem
Existing cable tie application tools face challenges in maintaining consistent tension over their lifespan due to mechanical wear, leading to inconsistent tensioning and ergonomic issues, especially in hand-operated tools, and feedback systems like electric-powered tools also suffer from tension variation over time.
Innovation Solution
A cable tie application tool featuring an electro-mechanical tensioning system driven by a power-delivery system, including a processor-controlled motor, strain gauges or load cells to measure reactionary force, and a cut-off system that activates when a predetermined tension is reached, ensuring consistent tensioning and precise cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If hand-operated mechanical tools are used for cable tie tensioning, then ease of operation is improved, but tension consistency deteriorates due to mechanical wear over time
Solution Approach 1:
The patent replaces the mechanical tensioning system with an electro-mechanical system that uses a motor-driven screw mechanism. This substitution eliminates the direct mechanical wear between moving parts that occurs in hand-operated tools, while the motor provides consistent rotational force. The tension is controlled electronically rather than purely mechanically, resolving the contradiction between ease of operation and tension consistency.
Solution Approach 2:
The patent incorporates a sensing system with strain gauges or load cells that provide real-time feedback on the tension applied to the cable tie. This feedback loop allows the control system to monitor and adjust the motor-driven tensioning process, ensuring consistent tension is achieved and maintained. The feedback mechanism compensates for any variations in the electro-mechanical system, maintaining reliability while preserving ease of operation.
2Reliability
If electric-powered tools with feedback systems are used, then tension consistency is improved, but device complexity increases
Solution Approach 1:
The patent extracts and integrates the sensing system (strain gauges or load cells) directly into the tensioning mechanism structure. Rather than adding separate complex feedback components, the sensing elements are embedded within the existing electro-mechanical system, measuring tension through the structural components themselves. This integration approach maintains tension consistency while minimizing the increase in device complexity.
Solution Approach 2:
The patent designs the electro-mechanical system where the motor-driven screw mechanism serves multiple functions: it provides the tensioning force, controls the tension application, and works in conjunction with the integrated sensing system. The control system manages both the motor operation and the feedback interpretation, creating a multi-functional integrated design that achieves tension consistency without proportionally increasing complexity.
3Manufacturing precision
If precise tension control is implemented, then manufacturing precision is improved, but device complexity increases due to additional sensing and control systems
Solution Approach 1:
The patent merges the tensioning function and the sensing function into a unified electro-mechanical system. The motor-driven screw mechanism that applies tension is directly coupled with the strain gauge or load cell that measures it, allowing precise tension control through a single integrated design. This merging approach achieves manufacturing precision in tension application while avoiding the complexity of separate, independent control systems.
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 consistent and precise tensioning of cable ties throughout its lifespan by accurately measuring and maintaining tension, eliminating the variability caused by mechanical wear and enhancing ergonomic performance compared to manual tools.
Implementation Method 1
strain gauges or load cells to measure reactionary force
Data Source
AI summary
A cable tie application tool is described that includes an electro-mechanical tensioning system. When the electro-mechanical tensioning system is controlled by a processor to tighten a cable, a reactionary force through a drive nut that is pivotally mounted to a tension bar can be monitored and measured by a strain gauge, a load cell, or other sensing system. This reactionary force is an indication of tension on the cable tie and is monitored by the processor until the tension reaches a predetermined tension, at which point, the processor causes a motor in the tensioning system to stop increasing the tension on the cable tie. The processor activates a cut-off system to cut the cable tie that has been tightened to the predetermined tension.