Sensor Bearing Impulse Ring Interlock for Higher Breaking Torque
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Solution Overview
Problem
Current sensor bearing unit designs have a low breaking torque between the target holder and the sleeve, leading to relative displacement issues between the impulse ring and the bearing ring, which affects the angular connection and precision.
Innovation Solution
The design incorporates a sleeve with radial protrusions that extend into complementary recesses on the target holder, enhancing the angular connection by preventing relative rotation, and additional axial grooves on the bearing ring to increase friction, ensuring secure fixation and reduced sliding movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sleeve is secured into the annular groove of the inner ring to prevent rotation, then the impulse ring is fixedly connected to the bearing ring, but the breaking torque between the target holder and the sleeve is too low
Solution Approach 1:
The invention transitions from a two-dimensional surface connection (sleeve in groove) to a three-dimensional interlocking connection by adding radial protrusions that extend into complementary recesses. This dimensional addition creates mechanical engagement that significantly increases breaking torque while maintaining the anti-rotation function.
Solution Approach 2:
The connection system combines multiple structural elements (radial protrusions, complementary recesses, axial portion, collar) into a composite mechanical joint. This composite structure integrates both anti-rotation and high breaking torque capabilities into a unified connection system between the sleeve and target holder.
2Ease of operation
If teeth are provided on the impulse ring bore to induce local deformation of the sleeve, then anti-rotation is provided, but the angular connection remains low
Solution Approach 1:
The invention divides the connection interface into discrete engagement points through multiple radial protrusions and complementary recesses. This segmentation creates multiple localized mechanical locks that collectively provide both anti-rotation and high angular connection, replacing the continuous but weak deformation-based connection.
Solution Approach 2:
The invention changes the connection parameter from deformation-based (teeth inducing local deformation) to geometry-based (radial protrusions fitting into complementary recesses). This parameter change transforms the connection mechanism from relying on material deformation to relying on precise geometric interlocking, significantly improving angular connection reliability.
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 configuration significantly improves the angular connection between the target holder and the sleeve, preventing relative rotation and enhancing the stability and precision of the sensor bearing unit, addressing the low breaking torque issue in existing designs.
Implementation Method 1
the axial portion of the sleeve comprises at least one radial protrusion extending into a complementary recess provided on the target holder. By having at least one radial protrusion of the sleeve extending into a complementary recess provided on the target holder, relative rotation between the sleeve and the target holder is prevented.
Implementation Method 2
The axial grooves increase the coefficient of friction between the first ring and the sleeve, therefore reducing the possibility of sliding movement between the two surfaces.
Data Source
AI summary
A sensor bearing unit includes a bearing, which has a first ring and a second ring, both rings being centered on an axis, and an impulse ring. The impulse ring includes a target holder, a target mounted on the target holder, and a sleeve secured to the first ring of the bearing. The sleeve is provided with an axial portion having at least one radial protrusion and a collar extending at least partially radially. The target holder is mounted radially around the axial portion of the sleeve and axially between the first ring of the bearing and the collar of the sleeve. The at least one radial protrusion of the sleeve axial portion extends into a complementary recess provided on the target holder.