Clearing Element for Milling Depth Accuracy
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Solution Overview
Problem
Self-propelled construction and mining machines face inaccuracies in milling depth due to movable side plates resting on previously milled material rather than the ground surface, leading to imprecise working of the ground surface.
Innovation Solution
A clearing element with a pivoting mechanism and curved clearing edges is positioned in front of the movable side plate to clear ground material, allowing the side plate to rest on the ground surface, ensuring accurate milling depth determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the movable side plate is used to determine milling depth, then the milling operation can be performed, but the side plate rests on previously milled material instead of the ground surface, resulting in inaccurate milling depth determination
Solution Approach 1:
The clearing element performs preliminary action by removing previously milled material from in front of the movable side plate before the side plate needs to rest on the ground surface. This preliminary clearing action ensures that when the side plate contacts the ground, it contacts clean ground surface rather than accumulated milled material, thereby resolving the measurement precision problem.
2Adaptability or versatility
If the housing is not closed down to the ground surface behind the milling drum, then material can be left on the worked area, but the movable side plate rests on milled-off ground material instead of the ground surface
Solution Approach 1:
The clearing function is segmented as a separate element distinct from the milling drum and housing structure. The clearing element operates independently to manage the ground surface condition in front of the side plate, allowing the housing configuration to remain flexible for different material disposal scenarios while ensuring accurate side plate positioning through dedicated clearing action.
3Measurement precision
If a clearing element is added in front of the movable side plate, then the ground material can be cleared for accurate side plate positioning, but the device complexity increases
Solution Approach 1:
The clearing element is designed to be automatically positioned and operated as part of the machine's existing movement and operational cycle. The element leverages the machine's forward motion and operational sequences to perform clearing without requiring separate complex control systems or additional power sources, thereby minimizing the increase in device complexity while achieving the desired measurement precision.
Data Source
AI summary
In a self-propelled construction machine or mining machine, in particular milling machine for working a ground surface, including a machine frame, a working device for working the ground surface, which is supported on the machine frame, wherein the working device is at least partially enclosed by a housing, at least one movable side plate, which closes the housing on at least one of the two sides of the working device , wherein the movable side plate rests on the ground surface in floating position during the working operation, it is provided that a clearing scraper is arranged in front of the at least one movable side plate as seen in the direction of travel, wherein the clearing scraper comprises at least one clearing edge for penetrating ground material lying on the ground surface in front of the movable side plate, and clears the ground material for the movable side plate so that the movable side plate may rest on the ground surface.