Angled Wear Insert for DCM Circle Shoe
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Solution Overview
Problem
Existing drawbar-circle-moldboard (DCM) systems require frequent manual maintenance and adjustment of wear inserts to maintain proper positioning and orientation of the blade, leading to inefficiencies and increased operational costs due to the need for regular servicing and potential inaccuracies in leveling operations.
Innovation Solution
The introduction of a DCM circle shoe with an angled wear insert design that allows for automatic adjustment and reduced maintenance, where the wear inserts are positioned at an oblique angle to the mounting surface, providing a sacrificial layer that erodes before damaging the circle member or yoke, and includes a mechanical biasing assembly to maintain the desired position and orientation without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If wear inserts are made of softer sacrificial material to reduce wear of circle member and yoke, then wear resistance is improved, but the wear inserts erode over time creating clearance and relative movement that requires frequent manual adjustment and maintenance
Solution Approach 1:
The system uses the erosion of the softer wear insert material to automatically create clearance that allows the circle member to self-adjust its position relative to the yoke, eliminating the need for manual maintenance adjustments while still protecting the harder components from wear
2Manufacturing precision
If wear inserts are periodically adjusted and replaced to maintain desired DCM clearances, then positioning accuracy is maintained, but the circle member and shoes must be completely removed from the bottom side of the yoke requiring extensive time and labor
Solution Approach 1:
The wear insert assembly is segmented into replaceable components where the wear insert can be independently accessed and replaced without removing the entire circle member and shoes assembly from the yoke, maintaining positioning accuracy while simplifying maintenance procedures
Solution Approach 2:
The wear insert acts as an intermediary component between the circle member and yoke that can be independently replaced to maintain proper clearances and positioning accuracy without requiring disassembly of the entire DCM assembly
3Manufacturing precision
If manual adjustment of wear inserts is performed to maintain proper blade positioning, then leveling operation accuracy is maintained, but productivity is reduced due to lost time during maintenance
Solution Approach 1:
The wear insert erosion automatically creates the necessary clearance for the circle member to maintain proper positioning relative to the yoke, eliminating manual adjustment requirements and maintaining leveling accuracy without reducing productivity
Data Source
AI summary
A DCM circle shoe for a motor grader is disclosed. The DCM circle shoe may have a base having a mounting surface, and a lip portion protruding from the base at an end of the base opposite the mounting surface in a direction generally parallel with the mounting surface. The DCM circle shoe may also have a wear insert mounted at a distal edge of the lip portion, the wear insert having an outer wear surface oriented at an oblique angle relative to the mounting surface of the base.