Adjustable Idler Wheel Track Roller Assembly

Solution Overview

Problem

Existing track roller assemblies face issues with improper engagement between the idler wheel and the track due to wear, leading to decreased performance, and existing adjustment methods, such as removable spacers, are difficult to install and retain.

Innovation Solution

A track roller assembly featuring a yoke member with adjustable idler keys that engage slots in the frame, allowing for precise positioning and retention of the idler wheel relative to the lower rollers, enabling easy adjustment and maintenance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If removable spacers are used to adjust the idler wheel position, then the spacing between worn components can be improved, but the installation and retention of the spacers becomes difficult

Engineering Contradiction:

Improveengagement between idler wheel and trackVSAvoidinstallation and retention of adjustment components

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The idler key is designed with a reversible orientation feature that allows it to be installed in two different positions. When installed in the first orientation, the idler wheel is positioned at a first height; when installed in the second orientation, the idler wheel is positioned at a second height. This dynamic adjustability eliminates the need for multiple removable spacers and simplifies both installation and retention, as the single idler key can be simply rotated to achieve the desired height adjustment.

Inventive Principle:

Principle #15Dynamics

2Device complexity

If the idler wheel position is fixed, then the assembly structure is simple, but the improper engagement due to wear cannot be accommodated

Engineering Contradiction:

Improvestructure of track roller assemblyVSAvoidengagement between idler wheel and track

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The idler key is designed with a reversible orientation feature that allows it to be installed in two different positions. When installed in the first orientation, the idler wheel is positioned at a first height; when installed in the second orientation, the idler wheel is positioned at a second height. This dynamic adjustability eliminates the need for multiple removable spacers and simplifies both installation and retention, as the single idler key can be simply rotated to achieve the desired height adjustment.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS8870305B2Track roller assembly having adjustable idler wheel

Publication Date: 2014.10.28 CATERPILLAR INC

AI summary

A track roller assembly for a track type machine is disclosed. The track roller assembly may have a yoke member with a first arm and a second arm spaced apart from the first arm, and an idler wheel rotatably disposed between the first and second arms of the yoke member. The track roller assembly may also have a frame configured to receive at least a portion of the yoke member, and at least one idler key configured to extend through an opening in the frame and engage a lengthwise slot in at least one of the first and second arms.