Integrated Metal Seat Structure for Lighter Rail Vehicle Seating
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Solution Overview
Problem
Existing load-bearing structures for road-rail vehicle seats are heavy, complex to manufacture, costly, and require mechanical assembly, which increases production time and cost, and they do not meet the space requirements for comfortable seating and movement mechanisms.
Innovation Solution
A load-bearing structure comprising a single-piece metal sheet body with integrated reinforcing elements welded inside a recess, eliminating the need for mechanical attachments, and manufactured through molding and cutting processes to ensure robustness and compliance with regulatory standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If multiple metal components are mechanically coupled together with screws to create a load-bearing structure, then the structure achieves sufficient strength and rigidity, but the manufacturing complexity and assembly time increase significantly
Solution Approach 1:
The patent merges multiple separate metal components (lateral flanks, reinforcing bars, seat bottom, backrest) into a single integrated load-bearing structure formed from one continuous metal sheet. This eliminates the need for mechanical coupling with screws, directly resolving the contradiction by maintaining structural strength through integration while dramatically reducing manufacturing complexity and assembly requirements
Solution Approach 2:
The single metal sheet structure serves multiple functions simultaneously: it provides the lateral flanks, internal reinforcing elements, seat bottom support, and backrest structure all in one component. This multi-functionality eliminates the need for separate components and mechanical assemblies, addressing both the strength requirement and the complexity reduction goal
2Stability of the object's composition
If multiple metal components are mechanically coupled together with screws, then the structure achieves sufficient rigidity, but the production time and work costs increase
Solution Approach 1:
By combining all structural elements into one monolithic metal sheet formation, the patent eliminates multi-step mechanical assembly operations. The structure achieves rigidity through its integrated geometry and continuous material structure, while production efficiency improves because the entire load-bearing structure can be formed in a single or minimal number of stamping/forming operations rather than requiring multiple components to be assembled
Solution Approach 2:
The load-bearing structure is pre-formed with all necessary geometric features, reinforcements, and anatomical shapes directly during the metal sheet forming process. This preliminary action eliminates the need for subsequent assembly operations, simultaneously ensuring structural rigidity is built-in from the start while maximizing production efficiency
3Strength
If metal reinforcing bars are attached inside the rigid body, then the structure achieves greater robustness, but the space available for cushion installation and movement mechanisms is reduced
Solution Approach 1:
The patent merges the function of separate internal reinforcing bars with the load-bearing structure itself by forming reinforcement features directly as integral parts of the metal sheet structure. This integration maintains structural robustness through optimized geometry and material distribution while eliminating the volume occupied by discrete reinforcing components, thereby maximizing internal space for cushions and mechanisms
Solution Approach 2:
The metal sheet structure incorporates locally optimized thickness variations and geometric reinforcements precisely where structural strength is needed, rather than using uniform thick walls or discrete reinforcing bars throughout. This local quality approach achieves maximum robustness with minimum material volume, preserving internal space while ensuring structural integrity
4Ease of manufacture
If a single-piece metal sheet body is used, then the manufacturing process is simplified and assembly is eliminated, but additional reinforcement may be needed to ensure sufficient strength
Solution Approach 1:
The single-piece metal sheet structure incorporates locally optimized features such as varied thickness zones, geometric reinforcements, and anatomical shaping precisely where structural strength is required. This allows the simplified single-piece manufacturing process to produce a structure that meets strength requirements through intelligent material distribution rather than through complex assembly of multiple components
Solution Approach 2:
The patent utilizes the metal sheet itself in a composite-like manner, creating a single-piece structure that functions as both the primary load-bearing element and the reinforcement. The integrated design combines structural and aesthetic functions in one material system, eliminating the need for separate reinforcement components while maintaining manufacturing simplicity
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 structure is lightweight, cost-effective, and simplifies assembly, allowing for comfortable seating and compliance with regulatory standards while reducing production time and space constraints.
Implementation Method 1
shaping a metal sheet through molding in order to achieve an anatomically shaped rigid body
Implementation Method 2
a plurality of reinforcing elements, also metallic, preferably made of steel, disposed inside the recess and attached to the body only by welding
Data Source
Figure 1~4
Figure 5~9
Figure 10~19
AI summary
A load-bearing structure (10) for a seat, in particular for passengers, for road-rail vehicles for public transport, wherein the load-bearing structure (10) comprises a rigid body (11) made by molding a metal sheet, so that it comprises both a lower part (12), which during use is substantially horizontal and is configured to support a seat bottom of the seat, and also an upper part (15) inclined by a certain right or obtuse angle with respect to the lower part (12), and also two lateral flanks (17, 19), which define an internal recess (22). A plurality of reinforcing elements (27), also metallic, preferably made of steel, are attached to the body (11) inside the recess (22).