Milling Machine Frame as Semi-Trailer Coupling Structure
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Solution Overview
Problem
The transportation of large self-propelled milling machines often requires special permits due to their weight and dimensions, and existing methods are inefficient, as they do not effectively utilize the machine's chassis and lifting devices to optimize the transport process.
Innovation Solution
A method involving a semi-trailer tractor with a fifth-wheel coupling, where the machine frame of the milling machine forms part of the semi-trailer, allowing for coupling and support without additional tools, thereby reducing the overall weight and eliminating the need for special permits, and utilizing the machine's chassis and lifting devices to create a mechanical connection between the tractor and trailer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a tractor unit with a low-loader is used to transport the large milling machine, then the machine can be transported to its place of use, but the overall weight and dimensions of the transport arrangement increase, requiring special permits from authorities
Solution Approach 1:
The machine frame of the milling machine is merged with the trailer to form an integrated semi-trailer structure. The machine frame serves dual purposes: as part of the milling machine itself and as the structural framework of the semi-trailer. This merging eliminates the need for separate support structures and reduces the overall weight of the transport arrangement.
Solution Approach 2:
The machine frame is designed to perform multiple functions: it serves as the structural base for the milling machine during operation and as the load-bearing structure of the semi-trailer during transport. The running gear and lifting devices also serve dual purposes, supporting the machine during operation and facilitating coupling/decoupling during transport. This multi-functionality reduces the need for additional specialized equipment.
2Ease of operation
If a tractor unit with a low-loader is used to transport the large milling machine, then the machine can be transported, but additional tools and equipment are required for coupling and supporting the machine
Solution Approach 1:
The milling machine's own running gear and lifting devices are used to perform the coupling and positioning operations during transport. The machine essentially services itself by using its integrated components to couple to the fifth wheel and position itself on the semi-trailer, eliminating the need for external tools and equipment.
Solution Approach 2:
The coupling devices are integrated into the machine frame itself rather than being separate external tools. The running gear and lifting devices are combined with the transport function, allowing the same components to serve both operational and transport purposes without requiring additional equipment.
3Weight of moving object
If the machine frame forms part of the semi-trailer, then the overall weight is reduced and special permits are eliminated, but the coupling and positioning process requires precise coordination of the running gear and lifting devices
Solution Approach 1:
The running gear and lifting devices are designed to serve dual functions: supporting the milling machine during operation and enabling coupling/positioning during transport. This integrated design reduces the need for separate systems and simplifies the overall coordination required, as the same components handle both operational and transport tasks.
Data Source
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AI summary
A method for transporting a self-propelled large milling machine with a chassis and a height-adjustable machine frame using lifting devices, using a tractor unit with a fifth wheel coupling for a semi-trailer that can be coupled behind the tractor unit in the direction of travel, comprises the following steps: a.) Positioning the machine frame of the large milling machine to couple the large milling machine to the fifth wheel coupling of the tractor unit or to a trailer using the chassis and/or lifting devices of the large milling machine, b.) Coupling and supporting the machine frame on the fifth wheel coupling of the tractor unit or on the trailer, c.) Repeating steps a) and b) to establish a mechanical connection between the tractor unit and the trailer by coupling the tractor unit and the trailer via the machine frame of the large milling machine, d.) Using at least the machine frame of the large milling machine with the trailer as a semi-trailer.