Road Milling Machine Axial Oscillation for Variable Texture
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Solution Overview
Problem
Existing road milling machines require multiple milling drums with different line spacings for various applications, leading to increased costs and operational inefficiencies due to the need for multiple machines or frequent conversions, as they are not versatile enough to handle both large milling depths and fine surface textures effectively.
Innovation Solution
A self-propelled road milling machine equipped with an oscillation drive that allows the milling drum to move axially, enabling adjustable oscillation strokes superimposed on the rotating movement of the tools, allowing for variable texture creation independent of the line spacing, thus eliminating the need for multiple drums and reducing conversion times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If milling drums with small line spacing are used to achieve fine surface textures, then the desired texture for roughening the pavement is achieved, but the milling drums are not suitable for large milling depths due to high tool density
Solution Approach 1:
The invention introduces an oscillation drive that enables the milling drum to perform axial oscillations in addition to rotation. This dynamic movement allows a single milling drum to adapt its effective line spacing during operation, enabling both fine surface textures (through small oscillation strokes) and large milling depths (through larger oscillation strokes), thereby resolving the contradiction between surface texture quality and milling depth capability
Solution Approach 2:
The oscillation stroke of the milling drum is made variable and adjustable. By changing the oscillation stroke parameter, the same milling drum can produce different effective line spacings, allowing it to achieve both fine textures and deep milling. This parameter adjustment capability enables a single drum to replace multiple drums with different fixed line spacings
2Adaptability or versatility
If multiple milling drums with different line spacings are maintained for different applications, then different milling requirements can be met, but additional costs and conversion time are incurred
Solution Approach 1:
The invention makes a single milling drum universal by equipping it with an oscillation drive and variable oscillation stroke capability. This allows one drum to perform the functions of multiple drums with different line spacings, enabling the same drum to handle various milling applications from fine texturing to deep milling without requiring physical replacement or conversion
Solution Approach 2:
By making the oscillation stroke variable and adjustable during operation, the milling drum can dynamically adapt to different application requirements. This eliminates the need for time-consuming conversions or replacements of milling drums when changing applications, as the oscillation parameters can be adjusted on-the-fly
Data Source
AI summary
In a self-propelled road milling machine for working road surfaces, comprising a machine frame, comprising a milling drum mounted to rotate and extending in axial direction transverse to the direction of travel, and a milling drum housing enclosing the milling drum, where the milling drum comprises multiple tools circumferentially preferably arranged in the shape of a helix, where the tools, except for the axial peripheral area, feature a specified mutual line spacing, it is provided for the following features to be achieved: an oscillation drive exercises an oscillation stroke on the axis of the milling drum moving to and fro in axial direction relative to the machine frame, where the rotating movement of the tools is superimposable with an axial movement parallel to the axis of the milling drum, the stroke of which is adjustable to the line spacing between two axially neighboring tools.