Angle Wrench Rotation Angle Measurement via Gyro Sensor
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Solution Overview
Problem
Existing angle wrenches with angular velocity sensors require a separate case and cushioning material, complicating the structure and limiting accuracy in measuring rotation angles.
Innovation Solution
An angle wrench with a torque-detecting mechanism using a toggle mechanism and a rotation angle-measuring section, featuring a case with an electronic circuit and display unit, and a detection sensor to measure rotation angles after detecting the specified torque, simplifying the structure and enhancing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an angular velocity sensor is secured to a head member with a screw, then the rotation angle can be detected, but a separate case and cushioning material are required, complicating the structure
Solution Approach 1:
The angular velocity sensor is integrated directly into the handle body, merging the sensor housing with the tool structure. This eliminates the need for a separate case and cushioning material, resolving the contradiction between measurement precision and device complexity
Solution Approach 2:
A magnetic field intermediary system is introduced where magnets are attached to the head section and a magnetic sensor detects their position. This intermediary magnetic field transmission allows rotation angle detection without direct mechanical connection or protective housing, simplifying the overall structure while maintaining detection accuracy
2Reliability
If the angular velocity sensor is wrapped with cushioning material, then impact absorption is improved, but the structure becomes more complex and installation is limited
Solution Approach 1:
The mechanical cushioning system is replaced with a magnetic field-based detection system. Magnets and magnetic sensors eliminate the need for mechanical cushioning materials, improving reliability without adding structural complexity
Solution Approach 2:
The magnetic field acts as an intermediary that transmits rotational information without requiring direct physical contact or protective housing, replacing the need for cushioning materials while maintaining sensor reliability
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 provides a simplified and accurate method for measuring rotation angles, allowing precise tightening by displaying the tightening angle on the wrench.
Implementation Method 1
a gyro sensor that detects an angular velocity of the angle wrench
Implementation Method 2
a torque-detecting mechanism configured to detect when a torque for tightening the object to be tightened has reached a specified torque
Data Source
Figure 1~3
Figure 4~5
AI summary
The present invention addresses the problem of providing an angle wrench that has a simple structure and is capable of accurately measuring rotation angle. The solution to the problem is an angle wrench used for tightening an object to be tightened by means of the rotation angle method, the angle wrench being provided with: a handle (2) having a grip (2a) ; a head section (4) having a tightening head (4a) for tightening the object to be tightened, and the tail section (4c) that extends from the tightening head (4a) being pivotally supported with respect to the handle (2) via a head pin (2b); torque-detecting mechanisms (6, 18, 20) for detecting when the torque for tightening the object being tightened reaches the specified torque; and a rotation angle-measuring section (24, 102) for measuring the rotation angle of the angle wrench in a tightening action, on the basis of the angular velocity of the angle wrench around the axis of the object being tightened, after the torque-detecting mechanism has detected that the specified torque has been reached.