Torque Sensor Hog Ring Integration via Adhesive Coupling
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Solution Overview
Problem
The existing torque sensors in motor-operated power steering systems face issues with hog ring separation during assembly and increased manufacturing costs due to the complex assembly process.
Innovation Solution
The torque sensor design incorporates a stator and rotor holder with coupling pieces featuring through-holes and hog rings that are adhered or fused in place, reducing the likelihood of separation and simplifying the assembly process by eliminating the need for separate hog ring insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a hog ring is coupled to an outer circumferential surface of a pressing section by an elastic force of the hog ring, then the hog ring can be installed without additional fastening mechanisms, but the hog ring is likely to be separated during the insertion process and requires an assembly process that increases manufacturing cost
Solution Approach 1:
The patent combines the hog ring and pressing section into a single integrated component. The hog ring is formed as an integral part of the pressing section, eliminating the need for separate installation and preventing separation during operation. This merging resolves the contradiction by ensuring reliability while maintaining ease of manufacture through一体化 design.
Solution Approach 2:
The hog ring is pre-formed and integrated into the pressing section during manufacturing, rather than being installed separately during assembly. This preliminary action ensures the hog ring is already in its final position and configuration, preventing separation issues while simplifying the manufacturing process.
2Device complexity
If a hog ring is coupled to an outer circumferential surface of a pressing section by an elastic force of the hog ring, then the coupling mechanism is simple, but an assembly process of inserting the hog ring into the pressing section is needed which increases manufacturing cost
Solution Approach 1:
The hog ring and pressing section are merged into a single integrated component with the hog ring formed as an integral part. This eliminates the separate assembly step of inserting the hog ring, improving productivity while maintaining simple coupling mechanism design.
Solution Approach 2:
The integrated design allows the pressing section to inherently provide the hog ring function through its own structure, eliminating the need for separate components and assembly operations. The component serves its own coupling function through its integrated 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
This design reduces the probability of hog ring separation and decreases the number of assembly steps, thereby lowering manufacturing costs and enhancing the reliability of the torque sensor.
Implementation Method 1
a second hog ring disposed in the through-hole to contract the second coupling piece in a central direction
Data Source
AI summary
Provided is a torque sensor. The torque sensor comprises a rotor section; and a stator section comprising a stator holder, wherein the stator holder comprises a plurality of coupling pieces protruding in an axial direction, and a hog ring coupled to pass through the plurality of coupling pieces, wherein the plurality of coupling pieces have through-holes formed in a circumferential direction and an inner wall of the through-hole is adhered to the hog ring.