Elastomeric Track Roller Width Optimization
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Solution Overview
Problem
Off-road vehicles equipped with track systems face issues of wear and deterioration due to stresses created by interaction between the track-engaging arrangement and the track, particularly from roller wheels, which affect traction and performance on soft and irregular surfaces.
Innovation Solution
A track system design featuring a track with elastomeric material, a ground-engaging outer side, an inner side, and lateral edges, supported by a track-engaging arrangement including a drive wheel, leading and trailing idler wheels, and roller wheels, where the frame is configured to expose most of the roller wheels and optimize their width and placement for reduced stress and improved traction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If roller wheels are used in the track-engaging arrangement, then the track is guided and supported, but stresses are created in the track causing wear and deterioration
Solution Approach 1:
The patent changes the geometric parameters of the roller wheels, specifically making their width less than the spacing between lateral edges of the track. This parameter change allows the roller wheels to contact only the reinforcing members (chains or cables) within the elastomeric track material, rather than contacting the entire track width, thereby reducing stress concentration and wear on the track structure
Solution Approach 2:
The patent applies local quality by designing roller wheels with specific width characteristics that match the local structure of the track. The roller wheel width is designed to be less than the track width, creating a localized contact region that targets specific load-bearing elements (reinforcing members) while avoiding unnecessary stress on other track portions
2Strength
If the frame supports roller wheels between them and the lateral edges of the track, then structural support is provided, but traction and floatation performance are reduced
Solution Approach 1:
The patent extracts the frame supporting structure from the region between the roller wheels and the lateral edges of the track. By removing this supporting structure, the track is allowed to extend freely to its full width, maximizing the ground-engaging surface area and improving traction and floatation performance without compromising the essential support function provided by the roller wheels themselves
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design enhances traction and reduces wear by distributing load more evenly and maintaining track tension, leading to improved performance on soft and irregular surfaces while minimizing stress on the track components.
Implementation Method 1
The track comprises elastomeric material, a ground-engaging outer side, an inner side opposite to the ground-engaging outer side
Implementation Method 2
a drive wheel to impart movement to the track
Implementation Method 3
a plurality of roller wheels between the leading idler wheel and the trailing idler wheel
Data Source
AI summary
A track system for traction of a vehicle comprising a track to engage the ground and comprising elastomeric material, a ground-engaging outer side and an inner side opposite to the ground-engaging outer side. The track system also comprises a track-engaging arrangement for driving and guiding the track around the track-engaging arrangement, which comprises: a drive wheel for movement of the track; a leading idler wheel and a trailing idler wheel spaced apart in a longitudinal direction of the track system, and a plurality of roller wheels between the idler wheels. The track system also comprises a frame supporting the idler and roller wheels. The track system also comprises a plurality of mounts spaced apart in the longitudinal direction of the track system to interconnect the frame of the track system to the vehicle frame, and allow movement of the frame of the track system relative to the vehicle frame.