Segmented Power Link with Groove Weld for Excavator Arm
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Solution Overview
Problem
Existing power link apparatuses in machines like excavators experience reduced work life and frequent repairs due to strenuous loads from repetitive tasks, leading to increased costs and machine downtime.
Innovation Solution
The apparatus features a link structure with parallelly disposed links, each comprising a first end segment, a second end segment, and an intermediate segment, where the intermediate segment is coupled to the stub portions of both end segments via groove welding, enhancing structural rigidity and accommodating loads through a fatigue-protected groove weld connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the apparatus uses conventional link structures subjected to repetitive strenuous loads, then the apparatus can perform digging, drawing, scoop, extract, and dump tasks, but the work life of the apparatus is reduced and frequent repairs are required
Solution Approach 1:
The link is divided into multiple segments (first end segment, intermediate segment, second end segment) that are coupled together through groove weld connections. This segmentation allows each segment to be optimized for specific load conditions and enables modular replacement if needed, improving overall reliability while maintaining productivity.
Solution Approach 2:
The apparatus employs groove weld connections with specific geometric parameters (groove angle, depth, and configuration) that change the mechanical properties of the joint. These parameter changes enhance the connection strength and fatigue resistance, extending the apparatus work life while maintaining its ability to perform strenuous tasks.
2Adaptability or versatility
If the apparatus is subjected to variety of loads during strenuous tasks, then the tasks can be executed, but structural integrity is compromised and frequent repairs are needed
Solution Approach 1:
The groove weld connections are strategically positioned at critical locations where loads are most severe. The local geometry of the groove welds is optimized to handle specific stress patterns, providing enhanced strength precisely where needed while maintaining overall structural integrity during various strenuous tasks.
Solution Approach 2:
The link structure combines different material properties through the groove weld connections, creating a composite structure that leverages the strengths of base metal and weld material. This composite approach enhances overall strength and adaptability to handle variety of loads during digging, drawing, scoop, extract, and dump operations.
3Device complexity
If the apparatus requires frequent repairs due to reduced work life, then initial design may be simple, but machine downtime increases and costs increase
Solution Approach 1:
The groove weld connections are designed and prepared in advance during manufacturing, with pre-formed grooves and specified welding procedures. This preliminary action ensures that the connections are optimally prepared before the apparatus enters service, reducing the need for repairs and minimizing potential downtime while maintaining design simplicity.
Data Source
AI summary
An apparatus for facilitating a pivotal movement of an implement relative to an arm of a machine includes a link. The link includes a first end segment, a second end segment, and an intermediate segment extending therebetween. Each of the first end segment and the second end segment includes an eyelet portion, and a stub portion that extends integrally and contiguously from the eyelet portion. The intermediate segment is coupled to the stub portion of the first end segment and to the stub portion of the second end segment.