Mini Torque Wrench Adjustment Mechanism Without Length Increase
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Solution Overview
Problem
Conventional torque wrenches face challenges in miniaturization due to length increase during torque adjustment, affecting operability and portability, and lack fine adjustment capabilities.
Innovation Solution
A mini torque wrench design featuring a tubular body with a pivotally connected rod, a trip mechanism, and an adjustment unit comprising a sliding member, rotating member, and driving member, allowing for torque adjustment without changing the overall length, using threaded engagement and axial movement to fine-tune the elastic force of the elastic member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional screw adjustment mechanism is used to adjust the elastic force of the elastic member, then the torque value can be adjusted, but the overall length of the torque wrench increases
Solution Approach 1:
The adjustment mechanism is nested within the tubular body of the torque wrench. The sliding member moves along the rod body inside the tubular body, and the elastic member is positioned within the adjustment unit, creating a compact nested structure that allows torque adjustment without increasing overall length
Solution Approach 2:
The adjustment mechanism transitions from axial movement to rotational movement through threaded engagement. The sliding member and rotating member are connected by means of threads, allowing the user to rotate the rotating member to drive the sliding member axially, enabling torque adjustment within a compact space
2Adaptability or versatility
If a conventional single adjustment mechanism is used, then the torque value can be adjusted, but fine adjustment capability is lost
Solution Approach 1:
The adjustment mechanism is divided into two independent segments: the rotating member for coarse adjustment and the driving member for fine adjustment. Each segment can operate independently to adjust the elastic force of the elastic member, providing both broad adjustment range and precise control
Solution Approach 2:
The sliding pin can move partially along the fine adjustment passageway to provide incremental fine adjustment. This partial movement capability allows for precise torque values to be achieved without requiring the entire adjustment range to be used
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 precise torque adjustment without altering the wrench's length, enhancing miniaturization, operability, and portability while reducing friction during adjustment.
Implementation Method 1
The sliding member and the rotating member are connected by means of threads
Implementation Method 2
The elastic member is connected to an adjustment unit... adjusting the elastic force of the elastic member against the trip mechanism
Implementation Method 3
reducing friction during adjustment
Data Source
AI summary
A mini torque wrench has a tubular body. A rod body is pivotally connected to one end of the tubular body. The rod body is further connected to a trip mechanism. The trip mechanism is connected to an elastic member. An adjustment unit is disposed on the other end of the tubular body. The adjustment unit is connected to an operating member. When the operating member drives the adjustment unit to adjust the elastic force of the elastic member, the overall length of the mini torque wrench will not change, so as to keep the advantage of miniaturization of the mini torque wrench.