Wheel Hub Pole Ring Slots for ABS Drainage and Corrosion Control

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Solution Overview

Problem

Existing wheel hub assemblies suffer from contamination and corrosion issues due to dirt accumulation and rust formation between the pole ring and the hub interior, affecting the accuracy of ABS sensor signals.

Innovation Solution

A pole ring design with outwardly extended slots and a rust-preventive coating, combined with axial support and a reinforcing crimp, to facilitate drainage and prevent coarse dirt ingress, while maintaining mechanical strength and sensor accuracy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the pole ring is designed with slots for ABS sensor sensing, then the sensor can detect rotational speed, but dirt and water accumulate behind the pole ring causing corrosion

Engineering Contradiction:

ImproveABS sensor rotation sensing accuracyVSAvoidcontamination and corrosion behind pole ring

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The slots in the pole ring are extended radially outward beyond the sensing requirement, creating an additional drainage dimension that allows water and fine dirt to escape from the hub interior while maintaining the necessary sensing functionality

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

Different regions of the pole ring serve different functions: the inner region maintains slots for sensing, while the outer extended region provides drainage functionality, with each area optimized for its specific purpose

Inventive Principle:

Principle #3Local quality

2Strength

If the radial extent of slots is kept small for mechanical strength, then the pole ring maintains structural integrity, but coarse dirt cannot be effectively blocked

Engineering Contradiction:

Improvepole ring mechanical strengthVSAvoidcoarse dirt ingress

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The pole ring structure is segmented into functional zones: the mounting section provides structural support, the pulse generator section with slots enables sensing and fine dirt drainage, while the outer extension blocks coarse dirt ingress

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The pole ring acts as a flexible barrier structure that can be mounted with friction fit while maintaining its blocking function against coarse particles while allowing fine particles and water to pass through the extended slots

Inventive Principle:

Principle #30Flexible shells and thin films

3Ease of manufacture

If the pole ring is pressed onto the hub neck without additional fastening, then assembly is simple, but the pole ring may become loose affecting sensor accuracy

Engineering Contradiction:

Improvepole ring assembly simplicityVSAvoidABS sensor signal accuracy

Core Design Contradiction:

Ease of manufactureVSMeasurement precision

Solution Approach 1:

The friction-fit mounting utilizes the cylindrical curvature of the hub neck and pole ring mounting section, creating a self-centering effect that maintains concentricity and sensor accuracy while enabling simple assembly

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The pole ring mounting design allows the component to self-center and self-lock through friction between the cylindrical surfaces, eliminating the need for additional fastening elements while maintaining positioning accuracy

Inventive Principle:

Principle #25Self-service

Data Source

PatentEP4299338B1Wheel hub assembly for a vehicle wheel and pole ring of an abs sensor

Publication Date: 2026.01.14 BPW BERGISCHE ACHSEN KG

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AI summary

Wheel hub assembly for a vehicle wheel with a pole ring and pole ring for a wheel hub assembly, wherein part of the pole ring is an impulse generator section formed integrally with the mounting section, which is provided with openings, preferably slots, distributed uniformly in the circumferential direction, wherein at least some of the openings or slots have an outward extension that is larger than the extension necessary for sensing.