Wheel Bearing Hub Slinger Deviation Prevention

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Solution Overview

Problem

Conventional wheel bearing sealing devices are prone to slinger deviation due to vibrations and axial loads, leading to compromised sealing performance and reduced bearing lifespan.

Innovation Solution

A sealing device for wheel bearings is designed with a deviation-preventing protrusion on the hub's outer circumferential surface and a hub groove, where the protrusion and groove meet at right angles to securely hold the hub slinger in place, preventing inward deviation and ensuring stable sealing performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the slinger is press fitted on the hub using a conventional protrusion of curved surface, then the slinger can be mounted on the hub, but the slinger deviates from the original mounting position due to vibration and axial load

Engineering Contradiction:

Improvemounting easeVSAvoidsealing performance

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The protrusion is divided into multiple segments: a first protrusion for initial mounting and positioning, and a second protrusion for preventing axial deviation. This segmentation allows each protrusion to perform its specific function independently, solving both mounting ease and sealing reliability requirements

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The deviation-preventing protrusion acts as an intermediary element between the hub and the slinger's axial inner end. It mediates the axial movement by providing a stopping surface that prevents the slinger from moving inward, thereby maintaining sealing performance without interfering with the mounting process

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If the slinger is press fitted on the hub with a simple protrusion structure, then the mounting process is simple, but the slinger excessively deviates and adversely influences wheel bearing performance

Engineering Contradiction:

Improvestructure complexityVSAvoidwheel bearing performance

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The protrusion structure is segmented into two distinct parts with different functions: the first protrusion for radial positioning and the second protrusion for axial limitation. This segmentation achieves reliable performance protection while maintaining relatively simple structure

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of making the slinger itself resistant to deviation through complex internal structure, the invention inverts the approach by adding a simple protrusion structure to the hub that externally constrains the slinger's axial movement, achieving the same protective effect with simpler means

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS10746229B2Wheel bearing sealing device and manufacturing method therefor

Publication Date: 2020.08.18 ILJIN GLOBAL

AI summary

According to one embodiment of the present disclosure, a sealing device of a wheel bearing may be disposed axially outside of rolling elements and may be mounted between an outer ring and a hub. The sealing device of the wheel bearing may comprise an outer ring slinger mounted on the outer ring, a hub slinger mounted on the hub, and a deviation-preventing protrusion which protrudes from an outer circumferential surface of the hub to hold an axial inner end of the hub slinger when the hub slinger moves inward in an axial direction. The outer circumferential surface of the hub may meet the deviation-preventing protrusion at right angles.