Magnetic Sensor Assembly Error Reduction via Positioning Protrusions
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Solution Overview
Problem
Existing torque sensors face assembly errors due to the non-fixed position of magnetic sensors relative to holders, affecting detection precision.
Innovation Solution
The magnetic sensor is integrally assembled to a holder with positioning protrusions and recesses, ensuring precise alignment and reducing assembly errors by regulating positional displacement through through holes and deformation forces during assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the magnetic sensor is only disposed between the pair of holders without being fixed as positioned, then the assembly process is simpler, but an assembly error may be caused between the holders and the magnetic sensor, affecting detection precision
Solution Approach 1:
The magnetic sensor is pre-assembled and fixed to one of the holders before the final assembly of the sensor device. This preliminary action ensures that the magnetic sensor maintains a precise, predetermined position relative to the holders, eliminating assembly errors that would otherwise occur during final assembly, while still keeping the overall manufacturing process simple
2Manufacturing precision
If the magnetic sensor is fixed to the holder, then assembly error is reduced, but the device complexity increases
Solution Approach 1:
The magnetic sensor is merged with one of the holders by fixing it directly to the holder, creating an integrated assembly. This merging reduces the number of separate components and assembly steps required, thereby reducing device complexity while simultaneously ensuring precise positioning and reducing assembly errors
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 significantly reduces assembly errors of the magnetic sensor with respect to holders, enhancing detection precision and accuracy in torque measurement.
Implementation Method 1
The positioning protrusion provided on the second holder is inserted through the through hole of the circuit portion
Implementation Method 2
The head portion may abut against a surface of the circuit portion on a first holder side
Implementation Method 3
a magnetic sensor that generates a detection signal on the basis of the magnetic flux which is guided by the magnetism collection rings
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
A sensor device that can reduce an assembly error of a magnetic sensor with respect to holders is provided. Magnetic sensors (110) are disposed between first magnetism collection portions and second magnetism collection portions with a first holder (51) and a second holder (52) assembled to each other. A circuit board recessed portion (95) of the second holder (52) is provided with positioning protrusions (96) that extend toward the first holder (51). A circuit board (111), on which the magnetic sensors (110) are mounted, is provided with through holes. The magnetic sensors (110) are integrally assembled to the second holder (52) in advance with the positioning protrusions (96) inserted through the through holes.