Tracked Running Gear Segmented Ground Plates
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Solution Overview
Problem
Tracked running gears for heavy excavators experience premature failure due to wear and geometric displacements caused by elongation of chain links and metallic contact between track rollers, ground plates, and drive sprockets, leading to polygonal deformation and reduced service life.
Innovation Solution
A tracked running gear design featuring a drive sprocket with laterally projecting tooth profiles and ground plates with vertically extending parallel teeth, where the ground plates form separate running surfaces for track rollers and support rollers, and curved surfaces for the guide wheel and drive sprocket, eliminating the polygon effect and reducing wear between the drive sprocket and ground plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chain links are elongated due to wear, then the tracked running gear can accommodate wear, but geometric displacements occur leading to polygonal deformation and failure
Solution Approach 1:
The ground plate is segmented into separate running surfaces: a first running surface for track rollers and support rollers, and a second running surface for the drive sprocket and guide wheel. This segmentation allows independent wear compensation for each surface, preventing geometric displacements that would otherwise lead to polygonal deformation.
2Device complexity
If a common running surface is used for track rollers and drive sprocket, then device complexity is reduced, but wear between components increases
Solution Approach 1:
The ground plate is divided into functionally separate running surfaces: a first running surface for track rollers and support rollers, and a second running surface for the drive sprocket and guide wheel. This segmentation prevents metallic contact between the drive sprocket and track roller surfaces, significantly reducing wear while maintaining a relatively simple overall structure.
3Reliability
If separate running surfaces are provided for track rollers and drive sprocket, then wear is reduced, but device complexity increases
Solution Approach 1:
The first running surface for track rollers and the second running surface for the drive sprocket are merged into a single ground plate component. This integration achieves wear reduction through surface separation while avoiding the complexity of multiple separate components, as the ground plate itself provides both distinct running surfaces.
Data Source
AI summary
A tracked running gear includes a drive sprocket having two sides and laterally projecting tooth profiles on both sides; a guide wheel, at least one track roller, at least one support roller, and an endless chain formed by ground plates interconnected in an articulated manner. The ground plates have vertically extending parallel teeth which engage the tooth profiles on both sides of the drive sprocket as the ground plates are diverted around the drive sprocket. The ground plates also include a first running surface having a substantially rectilinear form between the teeth for engaging the track roller and support roller, and second running surfaces having a curved form and arranged on opposite sides of the first running surface and between the teeth for engagement with the guide wheel and the drive sprocket.