Torque Sensor Module Adhesive-Free Coupling
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Solution Overview
Problem
Conventional torque sensors in Electric Power Steering systems face issues with magnet detachment due to adhesive defects, leading to performance degradation.
Innovation Solution
A torque sensor module with a support coupling part that eliminates the use of adhesives, directly contacting the yoke member and magnet, and features protruding structures from the rotor holder for stable coupling, enhancing manufacturing efficiency and binding properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If adhesive is used to couple magnets to the yoke member, then assembly is simplified, but magnet detachment occurs due to adhesive defects
Solution Approach 1:
The invention extracts and eliminates the adhesive from the coupling system, replacing it with a mechanical interference fit structure where the magnet's outer peripheral surface directly contacts the yoke member's inner peripheral surface, removing the unreliable adhesive layer while maintaining assembly simplicity through direct structural integration
Solution Approach 2:
The invention replaces the chemical bonding mechanism (adhesive) with a mechanical bonding mechanism (interference fit and direct contact), where the magnet and yoke member are coupled through precise dimensional design and geometric shape rather than chemical adhesion, thereby improving reliability without complicating assembly
2Ease of manufacture
If adhesive is used for coupling, then initial assembly is easier, but manufacturing defects and omissions occur
Solution Approach 1:
The invention removes the adhesive application step entirely from the manufacturing process, eliminating variables related to adhesive quality, application consistency, and curing conditions, thereby achieving uniform and reliable coupling results without the precision challenges of adhesive-based assembly
Solution Approach 2:
The magnet and yoke member are designed with self-aligning geometric features and interference fit dimensions that automatically ensure proper positioning and coupling during assembly, eliminating the need for adhesive application precision and enabling consistent manufacturing quality through self-constraining design
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
Prevents magnet detachment and improves sensor performance by ensuring a stable and adhesive-free coupling between the yoke member and magnets, thereby enhancing the reliability of the torque sensor.
Implementation Method 1
a support coupling part (140) contacting an upper side of the yoke member (120) and the first magnet (130)
Implementation Method 2
a rotor holder (110) having a hollowed center, and a yoke member (120) coupled to a periphery of the rotor holder (110)
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
Disclosed are structures of a torque sensor and of an angle sensor for a vehicular steering angle sensing devise. An embodiment of the present invention provides a torque sensor module comprising: a rotor holder, which has a hollow interior; a yoke member coupled along the outer peripheral surface of the rotor holder; and a first magnet coupled so as to contact the outer peripheral surface of the yoke member, wherein the torque sensor module comprises a supporting/coupling portion, which extends from the upper surface of the rotor holder, and which contacts the upper surfaces of the yoke member and of the first magnet, respectively.