Track Link Connector Retention Feature Design
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Solution Overview
Problem
Existing chain assemblies for mobile machines face challenges in maintaining retention force at track link connectors while preventing lubricant leakage, especially in applications where lubricant sealing is critical, such as tractor undercarriages.
Innovation Solution
The chain assembly incorporates a track link connector with a retention feature extending 360 degrees around its circumference, covering a portion of the interface, and a sealing feature covering the remaining portion, ensuring balanced retention and sealing properties without compromising lubricant sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a roughened surface is used as a retention feature on the track link connector, then the retention force at the track link joints is increased, but lubricant sealing is compromised due to potential leakage paths
Solution Approach 1:
The patent applies different surface qualities to different regions of the track link connector. The first end portion has a roughened surface with increased surface area that extends partially around the circumference to provide retention force, while the second end portion has a smooth surface that provides lubricant sealing. This local differentiation allows each region to perform its specific function optimally without compromising the other.
Solution Approach 2:
The retention feature is segmented to extend only partially around the circumference of the track link connector rather than covering the entire surface. This segmentation allows the roughened surface to provide retention force where needed while leaving other areas smooth for sealing purposes, thus resolving the contradiction between retention and sealing requirements.
2Force
If a retention feature covering the entire interface is used, then retention force is maximized, but the complexity of the track link connector design increases
Solution Approach 1:
The retention feature is designed to extend only partially around the circumference of the track link connector rather than covering the entire interface. This partial action provides sufficient retention force to secure the track links while maintaining a simpler design compared to a full-circumference retention feature. The partial extension achieves the necessary retention without the added complexity of a complete circumferential roughened surface.
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
This configuration effectively enhances the retention force at track link joints while preventing fluid leakage, making it suitable for applications where lubricant sealing is a priority, like tractor undercarriages, by maintaining a strong and durable chain assembly.
Implementation Method 1
The retention feature increases a retention force at the track link joints, thereby resisting axial movement of the track link connector relative to the track link
Data Source
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AI summary
A chain assembly (18) having a retention feature (60) is disclosed. The chain assembly may be used in conjunction with a mobile machine (10) and may include a pair of track links (26) and a track link connector (28). The track link connector may have an elongate, substantially cylindrical body (70) having a length dimension and having a substantially annular exterior surface and first and second opposing end portions (54, 72). The first end portion may be inserted into a bore (52) of one of the track links and form an interface (58) therebetween. The interface may have an axial length (62). The track link connector may further have a retention feature extending 360 degrees around a circumference of the exterior surface of the body at the interface. The retention feature may be a roughened surface and may cover a first portion (64) of the interface closest to a center of the cylindrical body.