Torque Tool Release Mechanism for Precise Fastener Tightening
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Solution Overview
Problem
Current torque tools, especially those used with lightweight materials in industries like automobile and aviation, face challenges in accurately applying target torque without damaging sensitive threaded connections, due to user variability and material tensile strength limitations.
Innovation Solution
A torque tool design featuring a main body with a housing and drive shaft, an adapter that pivots within the housing, and a sensor-actuated release mechanism using an electrically operated solenoid to decouple the adapter from the housing when the target torque is reached, ensuring precise torque transfer and preventing over-tightening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a torque tool is used to tighten threaded connections in lightweight materials, then the fastening function is achieved, but the risk of damaging the threaded connection increases due to excessive tightening force
Solution Approach 1:
The patent changes the operational parameter from continuous torque application to discrete torque control with automatic release. The torque tool is designed to apply torque up to a predetermined target value and then automatically release, preventing excessive tightening force. This parameter change ensures reliable fastening while protecting lightweight materials from damage.
Solution Approach 2:
The patent implements a feedback mechanism where the torque tool continuously monitors the applied torque and compares it to the predetermined target torque value. When the target torque is reached, the tool automatically triggers a release mechanism. This closed-loop feedback control ensures precise torque application and prevents over-tightening of lightweight materials.
2Ease of operation
If manual torque application is used, then the tool is simple to operate, but the torque consistency deteriorates due to user variability
Solution Approach 1:
The patent enables the torque tool to perform self-service by automatically monitoring torque application and triggering release when the target torque is reached. The tool does not require user intervention to determine when to stop tightening - it does so automatically based on predetermined parameters. This maintains ease of operation while ensuring consistent torque application through automated control.
Solution Approach 2:
The patent replaces the mechanical judgment and manual control of torque application with an automated sensor-based system. Instead of relying on user skill and physical sensation to determine when target torque is reached, the tool uses electronic sensors and control circuits to precisely measure and control torque, eliminating user variability while keeping the interface simple.
3Object-affected harmful factors
If torque control mechanisms are added to prevent over-tightening, then the protection of lightweight materials is improved, but the device complexity increases
Solution Approach 1:
The patent segments the torque tool into distinct functional modules: a torque application mechanism, a sensor system for detecting torque, a control unit for processing sensor signals, and a release mechanism. This segmentation allows each component to be optimized independently and simplifies the overall design by clearly defining the function of each part, reducing complexity while maintaining protection capabilities.
Solution Approach 2:
The patent implements preliminary action by pre-setting the target torque value before the tightening operation begins. The control unit is programmed with the predetermined torque threshold in advance, and the sensor system is calibrated beforehand. This preliminary configuration eliminates the need for complex real-time calculations during operation, simplifying the device while ensuring protection against over-tightening.
4Productivity
If automatic release mechanism is implemented, then the productivity is enhanced through automation, but the device complexity increases
Solution Approach 1:
The patent merges the release mechanism with the existing torque application structure. The release mechanism is integrated into the tool's main body rather than being a separate add-on component. The control unit that manages torque monitoring also triggers the release, combining multiple functions into a single control system. This merging reduces overall device complexity while maintaining automated productivity benefits.
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 solution allows for precise and consistent torque application, reducing the risk of damaging lightweight materials and enhancing productivity by automating the torque control process, thus ensuring effective and reliable fastening operations.
Implementation Method 1
The release mechanism (144) comprises a locking mechanism (146) and an actuator (162) designed to release the locking mechanism (146). The actuator (162) is designed as an electrically operated solenoid.
Data Source
AI summary
A setting torque tool to tighten a screw or a similar fastener to a target torque is disclosed. The torque tool comprises a main body with a housing and a drive shaft, which is firmly attached to the housing to transfer a torque. The drive shaft has a connection area, to which a drive can be connected. An adapter for an operating tool rotates together with the housing and the drive shaft to transfer the torque, Sensor measure and evaluate the torque transferred. A release mechanism, which is arranged in the housing, releases the torque tool upon reaching a target torque.