Sensor Bearing Housing Layout That Preserves Dual Seals
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Solution Overview
Problem
Conventional sensor bearing units face issues with unsatisfactory sealing due to the need to omit one of the two seals between the inner and outer rings to secure the sensor device, compromising the sealing integrity.
Innovation Solution
The sensor housing is secured into a groove on the cylindrical surface of the second ring, opposite to the first ring, allowing for the retention of two seals and utilizing a snapping portion made of synthetic material for easy mounting, which does not protrude radially, maintaining the radial boundary of the bearing unchanged.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the sensor device is secured into a groove radially facing the first ring, then the sensor device can be mounted, but one seal must be omitted resulting in unsatisfactory sealing
Solution Approach 1:
The sensor housing is relocated from a groove on the radial inner surface (facing the first ring) to a groove on the radial outer surface (opposite the first ring). This dimensional relocation allows the sensor device to be mounted without interfering with the seal positioned in the groove between the inner and outer rings, thus maintaining sealing integrity while achieving ease of mounting
2Ease of manufacture
If the groove is provided with radial side walls, then the groove is easy to machine, but the snapping portion may protrude radially changing the bearing boundary
Solution Approach 1:
The groove is designed with radial side walls that are localized to specific regions, while the snapping portion is positioned such that it does not protrude beyond the outer cylindrical surface of the second ring. This localized approach allows easy machining of the groove while maintaining the overall radial boundary dimension of the bearing unchanged
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 design ensures effective sealing and easy assembly while maintaining the structural integrity and compactness of the sensor bearing unit, enhancing its operational reliability and integration capabilities.
Implementation Method 1
The sensor device is provided with a sensor element facing the magnetic target of the impulse ring in order to determine, on the basis of magnetic field variations, the angular position of the rotatable ring
Data Source
AI summary
A sensor bearing unit includes a bearing having a first ring and a second ring centered on an axis, an impulse ring secured to the first ring of the bearing, and a sensor device for detecting rotational characteristics of the impulse ring. The sensor device includes a sensor housing secured to the second ring and at least one sensor element supported by the sensor housing and configured to cooperate with the impulse ring. The sensor housing is secured to a groove, having side walls, on a cylindrical surface of the second ring of the bearing, and the groove is located on a side of the second ring radially opposite the first ring.