Sensor Bearing Ring Texturing for Stable Impulse Ring Fixation
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Solution Overview
Problem
Existing sensor bearing units face issues with the angular connection between the impulse ring and the inner ring becoming loose due to high speeds, accelerations, vibrations, thermal dilatation, or high mechanical loads, leading to inaccurate signal measurement.
Innovation Solution
The implementation of a textured area on the cylindrical surfaces and lateral faces of the bearing rings, featuring parallel grooves and protrusions, enhances the angular connection by increasing the breaking torque between the impulse ring and the inner ring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional smooth cylindrical surfaces are used on bearing rings, then manufacturing is simpler, but the angular connection between impulse ring and inner ring becomes loose under high speeds, accelerations, and vibrations
Solution Approach 1:
The patent applies local quality by creating textured areas with grooves and protrusions only in specific zones where the impulse ring contacts the inner ring, rather than texturing the entire surface. This localized texturing provides enhanced mechanical interlocking exactly where needed for angular connection stability, while leaving other areas smooth for easier manufacturing and assembly.
Solution Approach 2:
The textured areas with grooves and protrusions are pre-formed on the bearing rings during manufacturing, creating mechanical interlocking features before the impulse ring is assembled. This preliminary action ensures that when the impulse ring is installed, the angular connection is immediately secured against loosening from high speeds, accelerations, and vibrations without requiring additional assembly steps.
2Measurement precision
If the impulse ring is securely fixed to the inner ring, then signal measurement accuracy is maintained, but the connection may fail under thermal dilatation and high mechanical loads
Solution Approach 1:
The patent segments the contact interface between the impulse ring and inner ring by creating multiple parallel grooves with protrusions, rather than relying on a single continuous contact surface. This segmentation allows the connection to maintain signal measurement accuracy through precise angular positioning while accommodating thermal dilatation and high mechanical loads through the distributed, modular structure that can flex and adapt under stress.
Solution Approach 2:
The textured areas modify the physical parameters of the contact surface by creating grooves and protrusions that change the friction characteristics and mechanical interlocking properties. This parameter change enhances both the measurement precision through stable angular positioning and the connection strength under thermal and mechanical stress by providing multiple engagement points that distribute loads.
3Strength
If textured areas with grooves and protrusions are created on bearing rings, then breaking torque between impulse ring and inner ring increases, but manufacturing complexity increases
Solution Approach 1:
The patent applies partial action by creating textured areas only in the regions where the impulse ring contacts the inner ring, rather than texturing the entire bearing ring surfaces. This provides sufficient breaking torque enhancement through localized mechanical interlocking while minimizing manufacturing complexity by limiting the textured areas to only where they are functionally necessary.
Solution Approach 2:
The patent adds a third dimension to the contact surface by creating protrusions that extend radially outward from the grooves. This dimensional change increases the breaking torque by providing mechanical interlocking in the radial direction, while the overall structure remains relatively simple with just two parallel grooves and their associated protrusions.
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 textured areas improve the angular connection, ensuring reliable and accurate signal measurement by maintaining a secure fixation between the impulse ring and the inner ring, even under demanding conditions.
Implementation Method 1
The textured area is provided with at least two parallel first and second grooves extending radially or axially, with a single inner protrusion disposed between and along the two parallel first and second grooves, with a first lateral outer protrusion disposed alongside the first groove, and with a second lateral protrusion disposed alongside the second groove. The first and second lateral outer protrusions extend respectively along the first and second grooves.
Data Source
AI summary
The bearing comprises a first ring (16) and a second ring (18) centered on an axis, each of the first and second rings being provided with an outer cylindrical surface (16b), with an inner cylindrical surface (16a), and with lateral faces (16c) which axially delimit the outer and inner cylindrical surface. One of the inner and outer cylindrical surfaces (16a) and/or one of the lateral faces (16d) of the first ring comprise a textured area (40, 42) provided with at least two first and second parallel grooves extending radially and axially, with a single inner protrusion disposed between and along the two parallel first and second grooves, with a first lateral outer protrusion disposed alongside the first groove, and with a second lateral protrusion disposed alongside the second groove, the first and second lateral outer protrusions extending respectively along the first and second grooves.