Torque Sensor Stator Holder Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing torque measuring devices for electric steering apparatus have high manufacturing costs and increased defect rates due to insert molding of metal and plastic materials, leading to potential separation of stator and shaft fixtures.
Innovation Solution
A torque measuring device with a stator holder integrally formed from non-magnetic metal materials using die casting, where the stator and shaft fixtures are combined to reduce costs and prevent separation, featuring a cylindrical shaft fixture and stator teeth meshed at a predetermined space for enhanced strength and magnetic field detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If insert molding is used to couple metal shaft fixture and plastic stator fixture, then manufacturing cost increases and defect rates increase, but the stator holder can be assembled with different materials
Solution Approach 1:
The patent merges the metal shaft fixture and plastic stator fixture into a single integrated stator holder component. This eliminates the insert molding process by combining multiple parts into one, thereby reducing manufacturing cost and defect rates while maintaining the functional benefits of using different materials for different purposes
Solution Approach 2:
The patent applies composite materials by integrating metal and plastic properties into a single stator holder structure. The stator holder exhibits both the strength and magnetic properties of metal, and the insulation and molding advantages of plastic, without requiring separate components joined by insert molding
2Ease of manufacture
If insert molding is used to couple metal shaft fixture and plastic stator fixture, then manufacturing complexity increases, but the stator holder can utilize properties of both metal and plastic materials
Solution Approach 1:
The patent merges the manufacturing processes by eliminating insert molding and producing the stator holder as a single integrated component. This simplifies the manufacturing process by removing the need for multi-step assembly operations while maintaining the functional advantages of combining metal and plastic material properties
3Ease of manufacture
If separate stator fixture and shaft fixture are used, then assembly flexibility is improved, but separation of components may occur after manufacturing
Solution Approach 1:
The patent merges the stator fixture and shaft fixture into a single integrated stator holder structure. This eliminates the risk of component separation while maintaining assembly flexibility through the integrated design, as the single component cannot separate into multiple parts
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
This configuration minimizes manufacturing defects, reduces costs, and maintains structural integrity by preventing separation of stator and shaft fixtures, while accurately measuring torque through the detection of magnetic fields generated between the stator and magnet.
Implementation Method 1
a sensing unit detecting a magnetic field generated from between the stator and the magnet
Data Source
Figure 1~2
Figure 3~5
AI summary
The present invention relates to a torque measuring device, the torque measuring device including a stator arranged at an inner surface of a housing, a magnet distantly arranged with the stator at a predetermined gap, a sensing unit detecting a magnetic field generated from between the stator and the magnet, and a non-magnetic stator holder integrally formed with a stator fixture fixed by the stator and a shaft fixture fixed by a shaft, whereby manufacturing cost can be minimized, and defects generated in the course of manufacturing process can be minimized.