Cast Idler Flange Layout for Debris Removal and Lower Weight
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Solution Overview
Problem
Existing idlers for track machines, such as those used in hydraulic excavators, face challenges due to their weight and cost, particularly when fabricated idlers are used, and there is a need for improved designs that enhance debris removal from the track wheel interface.
Innovation Solution
A cast idler design featuring a web member, rim, and zig-zag arranged flanges that project radially outward, with specific ratios of flange dimensions, providing improved engagement with link assemblies and reduced weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cast idlers are used for heavy duty applications, then durability and debris removal capability are improved, but weight and cost increase
Solution Approach 1:
The idler is divided into multiple segments including a web member, rim, and multiple flanges spaced around the circumference. This segmentation allows each component to be optimized independently - the web member provides structural strength while the flanges provide debris removal capability, achieving durability without excessive weight
Solution Approach 2:
The idler employs a composite structure combining a cast web member with attached flange elements. This composite approach allows the use of cast material where strength and resilience are needed (web member) while using simpler fabricated flanges for debris engagement, balancing durability and weight
2Weight of moving object
If fabricated idlers are used to reduce weight and cost, then weight and cost are reduced, but durability and debris removal capability deteriorate
Solution Approach 1:
The idler is divided into multiple segments including a web member, rim, and multiple flanges spaced around the circumference. This segmentation allows each component to be optimized independently - the web member provides structural strength while the flanges provide debris removal capability, achieving durability without excessive weight
Solution Approach 2:
The idler employs a composite structure combining a cast web member with attached flange elements. This composite approach allows the use of cast material where strength and resilience are needed (web member) while using simpler fabricated flanges for debris engagement, balancing durability and weight
3Ease of manufacture
If conventional idler designs are used, then manufacturing simplicity is maintained, but debris removal effectiveness is insufficient
Solution Approach 1:
The flanges are positioned asymmetrically around the rim circumference rather than uniformly distributed, with specific spacing optimized for debris engagement. This asymmetric arrangement enhances the ability to scrape and remove debris from the track while maintaining a relatively simple manufacturing process
Solution Approach 2:
The flanges extend radially outward from the rim in addition to the basic wheel structure, adding a third dimension to the design. This radial extension provides the necessary debris engagement surface area to improve debris removal effectiveness without complicating the basic manufacturing approach
Data Source
AI summary
An idler and method of manufacturing is disclosed. The idler may comprise a web member, a rim and a plurality of flanges. The web member may include a body. The body may include a front side, a back side and an aperture extending therethrough, wherein the web member is centered about the aperture and has an outer circumference. The rim may be oriented transverse to the web member and disposed on the outer circumference. The plurality of flanges may be spaced apart in a zig-zag disposition on the rim, each flange projecting radially outward from the rim and oriented to extend longitudinally parallel to the outer rim circumference.