Segmented Final Drive Debris Deflector for Joint Protection

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Solution Overview

Problem

Existing final drive systems in tracked machines are prone to debris infiltration, leading to damage and maintenance issues, as current solutions like the '680 patent do not adequately prevent debris from entering sensitive areas.

Innovation Solution

A debris deflector assembly comprising bolt-on mounting rings and deflectors is attached to the final drive, featuring angled surfaces to deflect debris away from critical joints and seams, providing comprehensive protection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If debris deflectors are added to prevent infiltration, then reliability is improved, but device complexity increases

Engineering Contradiction:

Improveprotection against debris infiltrationVSAvoidstructure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The debris deflector is divided into multiple segments (first deflector, second deflector, third deflector) that can be independently positioned and adjusted. Each segment addresses specific infiltration paths, allowing targeted protection without requiring a complete complex enclosure system.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The debris deflectors are made adjustable and repositionable rather than fixed, allowing them to be dynamically positioned to address varying infiltration paths. The adjustment mechanism enables the system to adapt to different operating conditions and debris patterns without requiring a complex fixed structure.

Inventive Principle:

Principle #15Dynamics

2Reliability

If comprehensive debris protection is implemented, then reliability is improved, but ease of manufacture deteriorates

Engineering Contradiction:

Improveprotection against debris infiltrationVSAvoidmanufacturing complexity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The protection system is segmented into multiple independent deflector components that can be manufactured separately using standard processes and then assembled. This segmentation allows each component to be manufactured with simpler processes while achieving comprehensive protection when assembled together.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Adjustment mechanisms serve as intermediaries between the deflectors and the final drive housing, allowing standard off-the-shelf components to be used rather than requiring custom-machined integrated structures. This intermediary approach simplifies manufacturing of individual parts while achieving complex protective functionality.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12428079B2Debris deflector for a final drive

Publication Date: 2025.09.30 CATERPILLAR INC

AI summary

A debris deflector includes an at least partially annular body defining a central axis, a radial direction, and a circumferential direction about the central axis. The at least partially annular body includes an outer radial extremity defining surface, an inner radial extremity defining surface, a first circumferential extremity defining surface, and a second circumferential extremity defining surface. A first deflection surface extends from the first circumferential extremity defining surface, and defines a first surface normal that points away from the central axis.