Sensor Bearing Surface Texturing for Stable Impulse Ring Locking
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Solution Overview
Problem
Sensor bearing units face issues with a loose angular mechanical connection between the impulse ring and the inner ring due to high speeds, thermal dilatation, or mechanical loads, leading to inaccurate signal measurements.
Innovation Solution
The introduction of a textured area with grooves and protrusions on the cylindrical surfaces and lateral faces of the bearing rings enhances the angular connection by increasing the breaking torque, which is achieved through local deformation, such as laser texturing, to improve the attachment of additional parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional smooth surface is used on the bearing rings, then the manufacturing process is simple, but the angular connection between the impulse ring and the inner ring becomes loose under high speeds, thermal dilatation, or mechanical loads
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 enhances angular connection stability at the critical interface while keeping the rest of the bearing rings smooth and easy to manufacture.
Solution Approach 2:
The textured areas are created during the manufacturing process through laser treatment or mechanical deformation before assembly. This preliminary action prepares the surface in advance to provide enhanced friction and mechanical interlocking, preventing future loosening under operational conditions without requiring additional assembly steps.
2Measurement precision
If the impulse ring is securely attached to the inner ring, then the signal measurement accuracy is maintained, but the mechanical connection may become loose due to high speeds, thermal dilatation, or mechanical loads
Solution Approach 1:
The textured areas with grooves and protrusions act as a preventive measure against connection loosening. By creating these surface features beforehand, the patent provides enhanced friction and mechanical interlocking that compensates for the loosening effects of thermal dilatation and mechanical loads, thereby maintaining measurement precision throughout the bearing's operational life.
3Strength
If a textured area with grooves and protrusions is created on the bearing rings, then the breaking torque and angular connection are enhanced, but the manufacturing process becomes more complex
Solution Approach 1:
The patent replaces complex mechanical fastening systems with a simpler laser texturing or mechanical deformation process. Instead of using additional fasteners, keys, or complex assembly procedures, the textured areas are created directly on the bearing ring surfaces using laser treatment or rolling, which enhances breaking torque through increased friction and mechanical interlocking without adding 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
This solution provides a robust and reliable angular connection, ensuring accurate signal measurements by maintaining the integrity of the impulse ring's attachment to the bearing inner ring under various operational conditions.
Implementation Method 1
one of the inner and outer cylindrical surfaces and/or one of the lateral faces of the first ring comprise a textured area provided with a groove extending circumferentially and with two protrusions disposed one on each side of the groove
Implementation Method 2
the breaking torque between the additional part and the first ring increases with the protrusions of the texture area which extend circumferentially along the groove
Implementation Method 3
the textured area is formed by local deformation of the cylindrical surface or the lateral face, for example by laser
Data Source
AI summary
The bearing provides a first ring and a second ring centered on an axis, each of the first and second rings being provided with an outer cylindrical surface, with an inner cylindrical surface, and with lateral faces that axially delimit the outer and inner cylindrical surface. One of the inner and outer cylindrical surfaces and/or one of the lateral faces of the first ring includes a textured area provided with a groove extending circumferentially and with two protrusions disposed one on each side of the groove and extending along the groove.