Sensor Bearing Impulse Ring Locking Against Relative Rotation
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Solution Overview
Problem
Sensor bearing units face issues with the angular mechanical connection between the impulse ring and the bearing ring becoming loose due to high speeds, thermal dilatation, or mechanical loads, leading to inaccurate signal measurements.
Innovation Solution
The implementation of anti-rotation means on the bearing ring and the impulse ring, such as slots, lugs, axial grooves, and bosses, to prevent angular movement and ensure a secure rotational connection, with the sleeve secured to the bearing ring by axial press-fitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the impulse ring is secured to the bearing ring using conventional methods (radial crimping or fixing sleeve), then the assembly is simpler and more compact, but the angular mechanical connection becomes loose under high speeds, thermal dilatation, or mechanical loads
Solution Approach 1:
The anti-rotation means are segmented into discrete circumferential elements (such as slots, grooves, or protrusions) that engage at specific locations around the circumference, providing rotational prevention while maintaining a relatively simple overall structure. This segmentation allows the connection to be effective without requiring a completely complex assembly mechanism.
2Reliability
If anti-rotation means are added to prevent angular movement, then the rotational connection stability is improved, but the device complexity increases
Solution Approach 1:
The anti-rotation means are merged with the existing structural elements of the bearing ring and impulse ring. Rather than adding completely separate components, the anti-rotation features (slots, grooves, protrusions) are integrated into the lateral faces and surfaces of the existing rings, combining multiple functions into unified structural elements.
Solution Approach 2:
The anti-rotation means serve multiple functions: they prevent rotational movement, provide mechanical engagement, and can accommodate thermal expansion and contraction. The same structural features that provide anti-rotation also serve as the primary mechanical connection between the bearing ring and impulse ring, eliminating the need for separate anti-rotation components.
3Ease of manufacture
If the connection structure is simplified for easier manufacturing, then the manufacturing cost decreases, but the connection becomes prone to loosening under operational loads
Solution Approach 1:
The anti-rotation means are designed to engage in a predetermined configuration during assembly. The circumferential slots, grooves, or protrusions are pre-formed in the bearing ring and impulse ring, ensuring that when the components are assembled, the anti-rotation engagement automatically occurs without requiring additional adjustment or complex assembly steps. This preliminary preparation maintains ease of manufacture while ensuring reliable connection.
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 enhances the stability of the angular connection between the impulse ring and the bearing ring, preventing relative rotation and ensuring accurate signal measurements by maintaining a secure and fixed rotational alignment.
Implementation Method 1
the sleeve is secured to the first ring only by axial press-fitting
Implementation Method 2
axial press-fitting
Data Source
AI summary
A sensor bearing unit includes a bearing having a first ring and a second ring, and an impulse ring provided with a target holder, with a target mounted on the target holder, and with a sleeve secured to the first ring, the target holder being axially mounted between a lateral face of the first ring and the sleeve. The first ring having at least one anti-rotation feature cooperating with at least one complementary anti-rotation feature formed on the impulse ring so as to prevent angular movement of the impulse ring relative to the first ring.