CV Joint Removal Tool With Inner Race Engagement

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Solution Overview

Problem

Existing tools for removing CV joints from driveshafts are cumbersome, risk damaging the driveshaft or adjacent components, and lack versatility for different vehicle models, leading to inefficiency and increased repair costs.

Innovation Solution

A tool with a frame and engagement member that applies force from the wheel side of the CV joint, engaging the inner race from the vehicle side to safely and efficiently remove the joint, adaptable to various vehicle models.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional removal tools are used, then the CV joint can be removed, but the driveshaft or adjacent components may be damaged

Engineering Contradiction:

Improvedamage risk to driveshaftVSAvoidremoval process safety

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent introduces a specialized removal tool as an intermediary device between the CV joint and the driveshaft. This tool includes a frame with engagement members that interface with the CV joint housing and bearing assembly, allowing force to be applied indirectly through the tool structure rather than directly to the driveshaft components, thereby preventing damage during removal

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The tool design incorporates force distribution features and engagement members that are positioned to engage with robust portions of the CV joint housing before removal force is applied. This beforehand positioning ensures that the force is distributed through the tool structure and engaged components, cushioning the driveshaft and adjacent parts from direct impact or excessive stress

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Productivity

If existing removal tools are used, then the CV joint can be removed, but the process is cumbersome and time-consuming

Engineering Contradiction:

Improveremoval efficiencyVSAvoidoperational simplicity

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The removal tool is segmented into distinct functional components: a frame structure, engagement members for the CV joint housing, and force application points. This segmentation allows each component to perform its specific function efficiently while enabling the tool to be manipulated easily by a technician, reducing the time and effort required for the removal process

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of applying force directly to the CV joint from the driveshaft end, the tool inverts the approach by engaging the CV joint housing and bearing assembly from the opposite side and applying removal force through the frame structure. This inverted methodology simplifies the operation by allowing force application at more accessible locations and reducing the complexity of the removal procedure

Inventive Principle:

Principle #13The other way round (Inversion)

3Reliability

If specialized removal tools are used, then the CV joint can be removed safely, but the tools lack versatility for different vehicle models

Engineering Contradiction:

Improvedamage risk reductionVSAvoidvehicle model compatibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The removal tool is designed with universal engagement features that can accommodate different CV joint configurations across various vehicle models. The frame structure and engagement members are configured to interface with common CV joint housing and bearing assembly features, allowing the same tool to be used safely on multiple vehicle platforms without requiring model-specific adaptations

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The tool incorporates adjustable or adaptable elements that can be configured for different vehicle models and CV joint types. This dynamic adaptability allows the engagement members and frame structure to be positioned and adjusted to match various geometries while maintaining the safe force application methodology, thus providing both reliability and versatility

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12472608B2Tool for removing a constant velocity joint

Publication Date: 2025.11.18 WALLMEK I KUNGALV

AI summary

A tool for removing a constant velocity (CV) joint from a driveshaft. The tool can include a frame with a first end arranged at a vehicle side of the CV joint and a second end arranged at a wheel side of the CV joint. The tool can further include an engagement member arranged at the first end of the frame. The engagement member can at least partly enclose the driveshaft and can engage with an inner race of the CV joint from the vehicle side of the CV joint. During use, the tool can be arranged such that a force applied to the frame at the second end of the frame in a direction away from the CV joint is transferred through the frame to the engagement member causing the engagement member to engage the inner race of the CV joint, thereby removing the CV joint from the driveshaft.