Vehicle Side Wall Stiffening via Longitudinal Recesses
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Solution Overview
Problem
Conventional rail vehicle body structures are complex, expensive to produce, and difficult to assemble, with visually unappealing surfaces due to numerous welded joints that often result in warping, requiring extensive straightening and increasing assembly time and effort.
Innovation Solution
A simplified vehicle body structure featuring side walls with longitudinal I-beams and recesses, eliminating additional reinforcements and stiffening elements, allowing for a flat surface and easier assembly with robotic welding, while maintaining structural integrity through strategically placed longitudinal recesses and U-profiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional car body structures with multiple struts, stiffening posts, and welded joints are used, then structural strength and stability are improved, but device complexity and manufacturing cost increase significantly
Solution Approach 1:
The patent combines multiple structural elements (struts, stiffening posts, and wall panels) into an integrated monocoque construction where the wall panels themselves provide structural strength. This eliminates the need for separate reinforcement elements while maintaining structural integrity through the optimized panel design and welding to longitudinal members.
Solution Approach 2:
The wall panels serve dual functions: they provide the external skin of the vehicle and simultaneously act as structural stiffening elements. The integrated design makes the panels multi-functional, combining load-bearing and enclosure roles that were previously separated into distinct components.
2Strength
If multiple individual components are welded together to form the car body framework, then structural integrity is improved, but assembly time and productivity decrease due to extensive assembly work
Solution Approach 1:
The patent reduces the number of separate components by integrating stiffening functions into the wall panels themselves. This merging of functions reduces the total number of parts that need to be manufactured and assembled, directly improving productivity while maintaining structural integrity through the optimized panel design.
3Strength
If extensive welding is performed to assemble the car body structure, then structural strength is improved, but manufacturing cost and assembly time increase due to inaccessibility of connection points
Solution Approach 1:
The patent extracts the stiffening function from separate internal reinforcement elements and integrates it directly into the wall panels. This eliminates the need for additional internal components and their associated connection points, simplifying the welding process while maintaining structural strength.
4Stability of the object's composition
If numerous welded joints are used in the side wall panels, then structural stability is improved, but surface quality deteriorates due to warping requiring extensive straightening
Solution Approach 1:
The patent combines the structural reinforcement function with the wall panels themselves, eliminating the need for separate internal stiffeners that would require additional welding. This reduces the total number of welded joints on the panel surfaces, minimizing heat-induced warping and improving surface quality while maintaining structural stability.
Data Source
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AI summary
The vehicle has a vehicle body structure comprising side walls (100) that run through longitudinal sides of the vehicle, where each side wall comprises an upper longitudinal beam (120) and a lower longitudinal beam (130). The side walls are provided with a side wall metal sheet. The side wall metal sheet vertically extends from the lower longitudinal beam to the upper longitudinal beam to stiffen an extending long trough (115). The long trough is designed as a bulge of the side wall metal sheet to a vehicle outer side, where the long trough is in a form of channel.