Wheel Bearing Detection Layout for Accurate Axial Displacement Sensing
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Solution Overview
Problem
Existing detection apparatuses for vehicle wheels have limited accuracy in detecting axial and lateral forces due to the small displacements measured near the bearing, which affects the precision of force calculations.
Innovation Solution
A detection apparatus with a discoid rotating part and a displacement detection unit positioned radially away from the bearing, allowing for increased axial displacement and improved voltage signal output, enhancing the accuracy of axial displacement detection and force calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the displacement sensor is provided near the bearing, then the device complexity is reduced, but the measurement precision deteriorates due to small displacements
Solution Approach 1:
The patent extends the rotating part radially outward from the bearing area to a position far from the bearing. This dimensional extension in the radial direction amplifies the displacement effect, allowing the displacement sensor to detect significantly larger displacements when positioned at the extended location rather than near the bearing, thereby resolving the contradiction between measurement precision and device complexity
2Measurement precision
If the rotating part for detection is located far radially outward from the bearing, then the measurement precision improves due to larger axial displacement, but the device complexity increases
Solution Approach 1:
The patent integrates the rotating part for detection with the existing bearing structure by fixing it to either the inner ring or outer ring of the bearing. This merging approach allows the detection function to be added without creating a completely separate complex structure, thereby improving measurement precision while minimizing the increase in device complexity
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 significantly improves the accuracy of detecting axial and lateral forces by increasing the axial displacement of the rotating part, leading to more precise force calculations and better vehicle control.
Implementation Method 1
The displacement detection unit is configured to output a voltage signal according to displacement of the rotating part for detection in the axial direction and displacement of the rotating part for detection in a direction perpendicular to the axial direction
Data Source
AI summary
A detection apparatus includes a base part, a bearing, a discoid rotating part for detection, and a displacement detection unit. The bearing has a first bearing member fixed to a rotating object, and a second bearing member fixed to the base part. The rotating part for detection is provided so as to rotate together with the first bearing member and extends radially outward of the bearing with respect to the first bearing member. The displacement detection unit is provided at a position in the base part which is radially away from the bearing and faces the rotating part for detection in an axial direction of the bearing. Moreover, the displacement detection unit is configured to output a voltage signal according to displacement of the rotating part for detection in the axial direction and displacement of the rotating part for detection in a direction perpendicular to the axial direction.