Multi-Part Drawbar for Tow Train Stability
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Solution Overview
Problem
Existing tow trains face challenges with directional stability and balance when navigating inclines, particularly due to the limitations of simple drawbar guidance systems that can only compensate for angles within the coupling play, leading to tension between trailers.
Innovation Solution
A multi-part drawbar system with pivotable sections and axes, including a vertical and horizontal pivot axis, allows for improved directional stability and balance by enabling trailers to follow curves and compensate for ground unevenness, with optional turntable steering and specific axle configurations for enhanced stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple drawbar guidance system is used, then the device complexity is reduced, but the directional stability and balance when navigating inclines deteriorates
Solution Approach 1:
The drawbar is divided into multiple sections (first drawbar section and second drawbar section) that can pivot relative to each other about a vertical axis. This segmentation allows each section to independently adjust to terrain variations and cornering forces, improving directional stability without requiring a completely complex system architecture.
Solution Approach 2:
The drawbar system incorporates pivotable connections that allow dynamic adjustment of the drawbar angle between the towing vehicle and trailer. This dynamic capability enables the system to automatically adapt to inclines and uneven ground, maintaining balance and stability without active control systems.
2Device complexity
If the drawbar allows only limited angle compensation within coupling play, then the device complexity is minimized, but tension between trailers increases when gradient changes
Solution Approach 1:
The invention introduces a vertical pivot axis in addition to the traditional horizontal coupling play. This adds a new dimension of movement that allows the drawbar sections to pivot vertically relative to each other, enabling effective angle compensation on inclines without increasing horizontal coupling complexity or generating excessive tension.
3Device complexity
If single-axle trailers are used, then the device complexity and space requirement are reduced, but the directional stability during cornering deteriorates
Solution Approach 1:
The multi-section drawbar with vertical pivot capability acts as an intermediary between the towing vehicle and the single-axle trailer. It compensates for the trailer's limited inherent stability by actively adjusting the coupling angle during cornering and incline navigation, effectively stabilizing the combination without requiring the trailer itself to be more complex.
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 multi-part drawbar system enhances directional stability and balance, particularly during cornering and incline changes, allowing for stable operation with single-axle trailers and enabling flexible configuration of tow trains with varying axle configurations.
Implementation Method 1
The two drawbar ends connected to the towing and towed vehicles are pivotably or rigidly connected to the vehicles about a first axis. The mutually facing ends of the drawbar sections, by which the first drawbar section is connected to the second drawbar section, are pivotably coupled to each other, with the pivot axis being vertical.
Implementation Method 2
A multi-part drawbar system with pivotable sections and axes, including a vertical and horizontal pivot axis, allows for improved directional stability and balance by enabling trailers to follow curves and compensate for ground unevenness
Data Source
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AI summary
Towing vehicle with a towing vehicle and at least one towed trailer, wherein at least one towing vehicle and one trailer or two trailers are connected to each other via a multi-part drawbar, the multi-part drawbar having a first drawbar section and a second drawbar section which are pivotably coupled to each other at their mutually facing ends about a vertical axis, wherein one of the drawbar sections is pivotable about a second axis which extends in the longitudinal direction of the drawbar.