Road Milling Machine Scraper Blade Height Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing road milling machines face operational inefficiencies when not loading milled material, as the scraper blade's height adjustment is imprecise due to machine arrangement, leading to increased friction, wear, and fuel consumption, and the material is either retained or spread unevenly.
Innovation Solution
A self-propelled road milling machine with a height-adjustable scraper blade controlled by a measurement device and regulator unit, allowing precise adjustment based on the milled material's height to ensure unhindered material exit and proper milling drum housing closure, utilizing contactless or tactile distance sensors for accurate measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the scraper blade is raised to allow milled material to remain behind the milling drum housing, then the milled material can stay in the milled track, but the milling drum housing becomes open and material spreads widely
Solution Approach 1:
A measurement device continuously detects the height of the milled material heap behind the milling drum housing and provides feedback to a control unit, which automatically adjusts the scraper blade height to maintain optimal containment without spreading material
Solution Approach 2:
The system uses the measurement device and control unit to automatically regulate the scraper blade position without operator intervention, enabling the machine to self-adjust to varying material heap heights and maintain consistent work quality
2Reliability
If the scraper blade is lowered to shut the milling drum housing, then material containment is improved, but friction increases leading to reduced performance and higher fuel consumption
Solution Approach 1:
The measurement device provides real-time feedback on material heap height, enabling the control unit to adjust the scraper blade to the minimum necessary height for containment, reducing unnecessary contact and friction while maintaining material containment
Solution Approach 2:
The system dynamically changes the scraper blade height parameter based on measured material heap conditions, optimizing the balance between containment effectiveness and friction reduction to minimize energy consumption
3Ease of operation
If the scraper blade height is manually adjusted, then operation is simple, but precision is insufficient due to machine arrangement limitations
Solution Approach 1:
The measurement device and control unit automatically perform the height adjustment task that would otherwise require manual operator intervention, eliminating the precision limitations of manual adjustment while maintaining ease of operation through automated control
Solution Approach 2:
The patent replaces the manual mechanical adjustment system with an automated system using measurement devices and control units, substituting human operator precision with electronic measurement and control precision
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
Ensures trouble-free operation with a clean work result by maintaining the milled material in the desired track, reducing wear and fuel consumption while preventing material spread, through precise adjustment of the scraper blade height based on real-time measurements.
Implementation Method 1
a measurement device to measure the distance between at least one reference point, which relates to the lower edge of the scraper blade, and the milled material
Data Source
AI summary
A self-propelled construction road milling machine, includes a machine frame and a milling drum housing, in which a milling drum is arranged. The machine includes a drive unit with which the height of the scraper blade of a scraper device can be adjusted in relation to the milling drum. A control unit for the drive unit adjusts the height of the scraper blade and a measurement device measures the distance between the lower edge of the scraper blade and the milled material. The control unit is designed in such a way that the scraper blade is height-adjustable depending on the height of the milled material remaining in the milled track. The control unit ensures that, on the one hand, the milled material can come out of the milling drum housing unimpeded behind the milling drum in the direction of work and, on the other hand, that the milling drum housing is shut above the material that is coming out. On the one hand, an unimpeded operation of the milling machine is thus ensured and, on the other hand, a clean result of the work is achieved.