Electro-mechanical Torque Wrench with Digital Display and Trip Mechanism
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Solution Overview
Problem
Conventional mechanical torque wrenches lack real-time torque value display, require frequent resetting of the torque adjustment mechanism, and have a bulky design that limits space for sensors, leading to inconvenience and potential misoperation.
Innovation Solution
An electro-mechanical torque wrench with a mechanical trip structure and digital torque value display, featuring a long and short rod trip mechanism with a strain sensor and adjustable screw rod for precise torque adjustment, and an anti-misoperation unit to prevent accidental torque adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a conventional mechanical torque wrench uses a spring-based torque adjustment mechanism, then the torque value can be adjusted, but the mechanism becomes bulky and leaves insufficient space for accommodating sensors
Solution Approach 1:
The patent replaces the conventional spring-based mechanical torque adjustment mechanism with a magnetic field-based system. A magnetic member is disposed inside the tubular body, and its position is adjusted using a drive mechanism (such as a motor or actuator) to change the magnetic field strength. This substitution eliminates the need for bulky mechanical springs and provides compact space for sensor accommodation while maintaining torque adjustment functionality.
2Ease of operation
If the torque adjustment mechanism is disposed at one side of the main body, then it is accessible for adjustment, but the user may touch it by accident during operation
Solution Approach 1:
The patent relocates the torque adjustment mechanism from a lateral position on the main body to an end position (either the front or rear end). This dimensional relocation allows the mechanism to be positioned in a location that is accessible for intentional adjustment but less likely to be accidentally touched during normal operation, as the user's hand typically grips the handle at a different location.
3Ease of operation
If the conventional trip mechanism uses a spring against a roller on an inclined surface, then the trip function works, but the design is bulky
Solution Approach 1:
The patent replaces the conventional spring-roller-inclined surface trip mechanism with a magnetic field-based trip mechanism. A magnetic member is positioned within the tubular body, and its displacement along the axial direction is detected by a sensor (such as a Hall effect sensor or optical sensor). When the applied torque causes the magnetic member to displace beyond a threshold position, the sensor detects this change and triggers the trip function, eliminating the need for bulky mechanical components.
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 real-time digital display of torque values, eliminates the need for frequent resetting, and prevents accidental misoperation by allowing precise adjustment and improved user convenience while accommodating sensors without bulkiness.
Implementation Method 1
An elastic member is connected between the extension portion and the long rod, so that the releasing member is biased by elastic force of the elastic member for enabling the pressing portion to press against the bearing portion
Implementation Method 2
A peripheral side of the long rod is provided with at least one strain sensor, and the strain sensor is electrically connected with a display module for sensing the amount of deformation of the long rod and transmitting the sensing information to the display module
Data Source
AI summary
An electro-mechanical torque wrench has a main body. A trip mechanism is provided in the main body. The trip mechanism includes a long rod and a short rod arranged side-by-side. A release member is connected between the long rod and the short rod. When in operation, the long rod and the short rod are subject to torque to cause flex. When the torque reaches a preset torque value, the release member is released to generate a mechanical sound and vibration to prompt a user to stop operation. The long rod is provided with at least one strain sensor, and the strain sensor is connected with a display module for sensing the amount of deformation of the long rod and transmitting sensing information to the display module, so that the display module outputs a corresponding torque value in a digital display manner.