Two-Prong Wheel Bearing Extraction Tool

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Solution Overview

Problem

Existing tools for extracting the outer ring wheel bearing component from tractors and trailers after failure are inefficient, often leading to tedious and time-consuming processes, and can damage internal wheel hub structures due to improper adjustment and wear, with many shops resorting to welding or using inadequate tools like punches and chisels.

Innovation Solution

A two-piece tool system where the first piece is inserted into the wheel cylinder, locking onto the outer ring, and the second piece, a hammering rod, is used to securely extract the outer ring, providing a quick and safe method distinct from traditional tools that tend to fail quickly and inadequately lock.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If adjustable bearing remover tools with pivot pins, slots and screws are used, then the tool can adapt to different bearing sizes, but the tool tends to loosen, wear out and slip, damaging the wheel hub internal structures

Engineering Contradiction:

Improveadjustability to different bearing sizesVSAvoidtool stability and security

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The tool is divided into multiple components: a body with notches for different bearing sizes, and removable prongs that can be selectively positioned. This segmentation allows the tool to adapt to various bearing diameters while maintaining structural integrity through fixed notches rather than adjustable moving parts.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The prongs act as intermediaries between the hammering force and the bearing outer ring. These prongs can be positioned in different notches to match different bearing sizes, providing adaptability without requiring the entire tool structure to be adjustable, thus maintaining reliability.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If impact tools with multiple moving parts are used, then the tool can be adjusted for different applications, but the moving parts loosen up under repeat impacts, adversely affecting adjustability

Engineering Contradiction:

ImproveadjustabilityVSAvoidtool durability under repeated use

Core Design Contradiction:

Adaptability or versatilityVSDuration of action of stationary object

Solution Approach 1:

The tool body contains fixed notches that provide predetermined adjustment positions. The prongs are removable and can be placed in different notches, eliminating the need for complex adjustable mechanisms with multiple moving parts that would loosen under repeated impact.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The prongs are designed as simple, replaceable components rather than permanently fixed or complexly adjustable parts. If wear occurs, the prongs can be replaced without affecting the tool body, extending the overall tool life while maintaining adjustability.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Device complexity

If punches and chisels are used for removal, then the tool is simple and widely available, but the process is tedious and time consuming, and can damage bearing seats

Engineering Contradiction:

Improvetool simplicityVSAvoidextraction speed and efficiency

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The tool is pre-configured with notches at specific diameters that correspond to common bearing sizes. This preliminary arrangement of extraction points eliminates the need for time-consuming measurement and adjustment during the extraction process, significantly improving productivity while maintaining tool simplicity.

Inventive Principle:

Principle #10Preliminary action

4Productivity

If welding is used to extract the outer ring, then the bearing can be removed, but the process is time consuming and may damage the wheel hub

Engineering Contradiction:

Improveextraction capabilityVSAvoiddamage to wheel hub internal structures

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The invention replaces the thermal process of welding with a mechanical extraction system. The hardened steel prongs deliver controlled impact forces through the bearing outer ring, eliminating the need for welding while reducing the risk of heat-related damage to the wheel hub internal structures.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS8281474B2Tool and method of use for extraction of failed wheel bearings

Publication Date: 2012.10.09 FRIAS ROBERTO

AI summary

A tool and method of use directed to the extraction of a wheel bearing's outer ring. When a tractor or trailer's wheel bearing fails and is in need of replacement, the present invention provides for a quick and easy means of extracting the remaining wheel bearing component residing in the wheel rim, the outer ring. The tractor wheel bearing extraction tool of the present invention is comprised of two pieces. The first piece is inserted into the wheel cylinder within the wheel rim and locks to the wheel bearing outer ring. The tool's first piece thus provides for a punching back for the second piece of the tractor wheel bearing extraction tool. The second piece is a hammering rod and is inserted into the opposite end of the wheel cylinder within the wheel rim. The hammering rod locks into the first piece and allows the user to hammer out the outer ring wheel bearing component with one strike.