Rail Coach Longitudinal Beam for Roof Attachment
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Solution Overview
Problem
Existing rail vehicle car body designs face challenges in efficiently attaching and integrating different roof sections of varying heights, particularly in accommodating flat roof areas without requiring mechanical processing or compromising structural integrity.
Innovation Solution
A longitudinal beam with dedicated attachment points for both upwardly curved and flat roof sections, allowing for easy attachment and integration of different roof types without altering the beam's design, using extruded metal profiles with hollow chamber structures for enhanced structural support and drainage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a roof pan is connected to a contoured roof by creating a rectangular opening and welding, then the flat roof area can be attached, but part of the lateral structural body has to be cut off to make the attachment point accessible
Solution Approach 1:
The attachment point is segmented into two separate projections (first projection for contoured roof attachment, second projection for flat roof attachment) on the longitudinal beam. This segmentation allows each roof type to be attached to its dedicated projection without requiring modifications to the lateral structural body, eliminating the need to cut off parts of the structural body while maintaining ease of manufacture for both roof types.
2Adaptability or versatility
If different roof sections are attached to accommodate various devices, then device integration is improved, but the structural integrity and vibration behavior may be compromised
Solution Approach 1:
The longitudinal beam is designed with multi-functional projections that can accommodate different roof types (contoured and flat) at different locations along its length. The first projection supports contoured roofs while the second projection supports flat roofs suitable for device mounting. This universal design allows versatile roof configurations for device integration while maintaining structural integrity through the continuous longitudinal beam structure that provides consistent support throughout.
Solution Approach 2:
The longitudinal beam employs a composite hollow chamber structure that combines structural support functions with vibration damping properties. The hollow chamber design provides both mechanical strength for supporting different roof types and inherent vibration isolation characteristics, ensuring structural integrity is maintained while accommodating versatile roof configurations for various devices.
3Adaptability or versatility
If multiple attachment points are provided on the longitudinal beam, then different roof types can be attached, but the beam design becomes more complex
Solution Approach 1:
Multiple attachment functions are merged into a single longitudinal beam structure with integrated projections. The first and second projections are both formed as integral parts of the same longitudinal beam, combining what could have been separate components into one unified structure. This merging provides versatile roof attachment options while actually simplifying the overall design by reducing the number of separate components needed.
Data Source
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AI summary
The invention relates to a longitudinal support (10) for the transition region from a coach body side wall to the coach body roof of a rail vehicle coach body (1), comprising a first attachment point (12) for a first roof section (4), wherein in the installed position the first attachment point is oriented vertically upwards or obliquely upwards in the direction of the coach body interior. Said longitudinal support is characterised by: a second attachment point (14) for a second roof section (3), wherein in the installed position the second attachment point is oriented in the direction of the coach body interior (B) and said attachment point is arranged under the first attachment point (12), and a third attachment point (17) for a coach body side wall (2, 8), wherein in the installed position the third attachment point is oriented downwards or obliquely downwards, and wherein the longitudinal support is formed in one piece. The invention further relates to coach bodies of a rail vehicle having such a longitudinal support, to a side wall for a rail vehicle coach body, and to a method for producing a rail vehicle coach body having at least one first roof section and at least one second roof section, wherein the first roof section projects upwards over the second roof section.