Canted Rail Surface Edges for Machine Track Wear Distribution
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Solution Overview
Problem
Machine tracks experience varying wear rates due to operational conditions and environments, leading to uneven wear patterns and potential for premature component failure, which affects service life and maintenance intervals.
Innovation Solution
The design of a track link with a canted upper rail surface, where at least one of the inboard or outboard peripheral edges on each link strap is canted in an inboard-outboard direction relative to the longitudinal midline, distributing wear and reducing contact surface area to mitigate issues like roller trenching and scalloping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional track links with flat upper rail surfaces are used, then manufacturing is simpler, but wear is uneven and service life is reduced
Solution Approach 1:
The patent applies local quality by creating a canted upper rail surface with a specific angle (e.g., 15-45 degrees) relative to the longitudinal axis. This localized geometric modification concentrates wear in a controlled manner, preventing uneven wear patterns and extending service life. The canted surface ensures that wear is distributed along the length of the rail surface rather than concentrating at specific points, thereby improving reliability without requiring complex multi-component systems.
2Strength
If larger contact surface area is used on track rollers, then load distribution is improved, but roller trenching and scalloping occur more rapidly
Solution Approach 1:
The patent changes the geometric parameter of the upper rail surface by introducing a cant angle between 15-45 degrees. This parameter modification alters the contact mechanics between the roller and rail surface, distributing contact pressures more evenly along the length of the rail surface. The canted configuration prevents the formation of trenching and scalloping by ensuring continuous contact rather than concentrated contact at specific points, thereby maintaining load distribution while preventing harmful wear patterns.
3Strength
If track links are made more robust to handle high loads, then strength is improved, but wear rates increase in abrasive environments
Solution Approach 1:
The patent applies local quality by modifying only the upper rail surface geometry with a canted configuration, while maintaining the overall robust structure of the track link for load capacity. The canted surface creates a localized wear distribution pattern that prevents premature wear in abrasive environments, allowing the track link to maintain both its structural strength and wear resistance without requiring complete redesign of the entire link structure.
Data Source
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AI summary
A track link (28) for a machine track (26) includes an elongate link body (36) having an upper rail surface (53) with an inboard peripheral edge (55) and an outboard peripheral edge (56) each formed upon a first link strap (35), a second link strap (39), and a middle section (42). The upper rail surface (53) defines a longitudinal midline (58) and at least one of the inboard peripheral edge (55) or the outboard peripheral edge (56) upon the first link strap (35) and the second link strap (39) is canted, in an inboard-outboard direction, to a longitudinal midline (58) of the upper rail surface (53).