Fiber-Composite Bogie Cross Beam for Simpler Multi-Chamber Manufacturing
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Solution Overview
Problem
Existing bogie designs, particularly those made of fiber composite materials, are complex and difficult to produce, lacking a simple and efficient method for manufacturing a cross member that provides both lightweight construction and improved rigidity.
Innovation Solution
A cross member designed as a hollow chamber profile made of fiber-plastic composite with at least three adjacent hollow chambers connected by an outer fiber layer, featuring a compressed air reservoir and suitable for various bogie designs, including rail vehicles, which can be easily manufactured using filament winding technology and pre-impregnated fiber layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If fiber composite construction is used for bogie cross members, then lightweight construction is achieved, but manufacturing complexity increases
Solution Approach 1:
The cross member is divided into multiple hollow chambers (at least three) that are connected to each other. This segmentation allows for simplified manufacturing of individual chambers that can be joined together, reducing the overall manufacturing complexity while maintaining the lightweight fiber composite construction
Solution Approach 2:
The hollow chambers are nested within the fiber-plastic composite structure, with the chambers forming the core lightweight framework that is then surrounded and connected by the outer fiber layer. This nesting approach creates a complex functional structure from simpler nested components
2Strength
If traditional welded box construction is used for steel bogies, then structural strength is achieved, but weight increases
Solution Approach 1:
The cross member uses fiber-plastic composite materials (such as carbon fiber, glass fiber, or aramid fiber reinforced plastics) instead of traditional steel. These composite materials provide high strength-to-weight ratio, achieving the required structural strength while significantly reducing the weight of the cross member
Solution Approach 2:
The cross member is segmented into multiple hollow chambers connected together, creating a structure that efficiently distributes mechanical loads while minimizing material usage. This segmentation provides both strength through load distribution and weight reduction through the hollow chamber design
3Stability of the object's composition
If multiple hollow chambers are integrated into the cross member, then overall rigidity is improved, but manufacturing difficulty increases
Solution Approach 1:
The cross member is divided into at least three adjacent hollow chambers that are connected to each other. This segmentation creates a multi-chamber structure that enhances overall rigidity and stiffness while allowing each chamber to be manufactured and assembled separately, thereby managing manufacturing complexity
Solution Approach 2:
The hollow chambers serve multiple functions: they provide structural rigidity, reduce weight, and can be used for routing cables or hoses through the cross member. This multi-functionality justifies the integrated design while maximizing the benefit of each chamber
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 cross member achieves a high degree of lightweight construction with improved overall rigidity and mechanical properties, suitable for various bogie designs, particularly in rail vehicles, while being easy to produce and cost-effective.
Implementation Method 1
a fiber layer which is impregnated with a matrix material
Implementation Method 2
one of the at least three hollow chambers of the cross member, in particular the middle of three hollow chambers, is designed entirely or partially as a compressed air reservoir
Data Source
Figure 1a
Figure 1b~1c
Figure 1d~2
AI summary
The invention relates to a cross bar (1) for a bogie (7) having a construction which is advantageously appropriate for fibre composites, but nevertheless easy to implement, and a particularly simple method for producing the cross beam. The cross beam is designed as a hollow chamber profile made of a fibre-plastic composite and has at least three hollow chambers (2) which are arranged next to one another and are connected by means of at least one outer fibre ply, wherein the outer fibre ply covers, at least in some regions, at least the surfaces of the cross bar (1) which are not provided for the arrangement of side elements (73) of the bogie. Thecross bar (1) is manufactured by producing at least three elongate hollow profiles made of a fibre-plastic composite and wrapping the arrangement of hollow profiles with the outer fibre ply.