Spring Suspension for Milling Machine Lifting Columns
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Solution Overview
Problem
Self-propelled milling machines have limited working efficiency due to their low driving speed when moving between milling locations, as vibrations can damage mechanical components and reduce their service life, leading to slow movement and reduced productivity.
Innovation Solution
The lifting columns of the milling machine are modified to include a spring device, allowing for suspension during driving operations, enabling the machine to move at higher speeds without damaging components and reducing operator discomfort, thus increasing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the milling machine moves at higher driving speeds between locations, then the working efficiency increases and relocation time decreases, but vibrations damage mechanical components and reduce their service life
Solution Approach 1:
The patent introduces a spring device that is coupled to the lifting columns before high-speed travel begins. This spring device acts as a cushioning element that absorbs vibrations and shocks during driving operation, preventing damage to mechanical components while allowing the machine to travel at higher speeds between milling locations.
Solution Approach 2:
The patent makes the lifting columns dynamically configurable by coupling them to a spring device that can be engaged or disengaged based on operational mode. During driving operation, the spring device is activated to provide vibration isolation, while during milling operation, the system can be configured for rigid support, allowing the machine to adapt its mechanical characteristics to different operational requirements.
2Loss of time
If the milling machine moves at higher driving speeds, then the time taken to relocate decreases, but the vibrations become uncomfortable for the vehicle driver
Solution Approach 1:
The spring device is prepared and coupled to the lifting columns before high-speed travel begins, ensuring that vibration isolation is already in place when the machine starts moving at higher speeds. This prevents uncomfortable vibrations from reaching the driver's cab during relocation.
3Speed
If the lifting columns are modified to include a spring device, then suspension during driving is enabled and higher speeds are possible, but the device complexity increases
Solution Approach 1:
The lifting columns are designed to serve dual functions: they provide height adjustment during milling operation and serve as suspension elements during driving operation. By coupling the spring device to the existing lifting column structure, the same mechanical components perform multiple functions, avoiding the need for separate suspension systems and minimizing the increase in device complexity.
Solution Approach 2:
The patent merges the height adjustment function of the lifting columns with the suspension function by coupling the spring device directly to the lifting column structure. This integration allows a single system to provide both functions, reducing the overall complexity compared to having separate independent systems for each function.
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
The modification allows the milling machine to move at significantly higher speeds, significantly reducing the time taken to relocate, thereby substantially increasing the overall working efficiency without increased space or equipment costs.
Implementation Method 1
a spring device can act between the machine frame and the lifting columns
Data Source
Figure 1~2
Figure 3~4
AI summary
In a self-propelled milling machine, in particular a road milling machine (1), stabilizer, recycler or surface miner for processing road or soil surfaces (5), with a chassis (2) having front and rear chassis axles (4, 6) in the direction of travel (18) with a total of at least three running gears (8), with a machine frame (3) supported by the chassis (2), with lifting columns (10) between the running gears (8) and the machine frame (3) on at least two running gears (8) of a chassis axle (4, 6) offset transversely to each other in the direction of travel (18), and with a work roller (12), it is provided that the work roller (12) is adjustable into a position for travel with the work roller (12) raised and the lifting columns (10) in the set position of the work roller (12) are coupling with a spring device (14) at a distance from the road or soil surface (5).