Rail Vehicle Window Profile Integrating Air Ducts

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Solution Overview

Problem

Rail vehicle window profiles face challenges in integrating multiple functionalities such as accommodating window panes, air ducting, and ensuring structural rigidity while being cost-effective and lightweight, with existing solutions relying on multiple individual components and complex joining processes.

Innovation Solution

A window profile for rail vehicles featuring an extruded aluminum profile with integrated air-conditioning ducts, molded window corners, and horizontal stop frames that combine structural and functional elements, including thermal insulation and stiffening features, to form a compact, lightweight, and economically efficient solution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple individual components are used to provide different functionalities (window accommodation, air ducting, structural support), then each function can be optimized independently, but the device complexity and number of joining processes increase

Engineering Contradiction:
Improvefunctional integrationVSAvoidnumber of components
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent merges multiple previously separate components (vertical stop frame, air conditioning duct, window corners, horizontal stop frames) into a single integrated extruded profile. This consolidation reduces the number of parts and joining processes while maintaining all required functionalities including structural support, air ducting, and window accommodation.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The integrated window profile serves multiple functions simultaneously: it provides structural support for the vehicle body, accommodates window panes through molded corners, guides air flow via integrated ducts, and contributes to vehicle rigidity. This multi-functionality is achieved through a single extruded aluminum profile design.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If multiple individual components connected by joining processes are used, then different functionalities can be provided, but the manufacturing cost and production time increase

Engineering Contradiction:
Improvefunctional integrationVSAvoidmanufacturing cost
Core Design Contradiction:
Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent combines multiple functionalities into a single extruded profile, eliminating the need for separate components and their associated joining processes. This reduces manufacturing steps, labor costs, and production time while maintaining all required functions.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The air conditioning duct is pre-formed as an integral part of the extruded profile during the extrusion process itself, rather than being added as a separate component afterward. This preliminary integration of the duct into the profile structure eliminates subsequent assembly operations.

Inventive Principle:
Principle #10Preliminary action

3Strength

If traditional window profiles are used, then structural requirements can be met, but weight savings and space optimization are limited

Engineering Contradiction:
Improveload capacityVSAvoidvehicle weight
Core Design Contradiction:
StrengthVSWeight of moving object

Solution Approach 1:

The patent utilizes aluminum as the base material for the extruded profile, which offers a favorable strength-to-weight ratio. The integrated design allows for optimized material distribution within the profile cross-section, providing required structural strength while minimizing weight through efficient use of the lightweight aluminum material.

Inventive Principle:
Principle #40Composite materials

Solution Approach 2:

By integrating the air conditioning duct and structural frame into a single component, the design eliminates redundant materials and achieves weight savings. The combined structure uses material more efficiently, providing both structural support and air ducting functions without the weight penalty of separate components.

Inventive Principle:
Principle #5Merging (Combining)

Data Source

PatentEP2849984B1Window profile for a rail vehicle
Publication Date: 2019.11.20 SIEMENS MOBILITY GMBH
  • EP2849984B1 patent drawingFigure 1~2
  • EP2849984B1 patent drawingFigure 3~4
  • EP2849984B1 patent drawingFigure 5~6

AI summary

The invention relates to a rail vehicle window profile (100). In particular, the invention relates to a rail vehicle window profile (100) which has window corners (110), a vertical stop frame (120), a first horizontal stop frame (130), and a second horizontal stop frame (140). The vertical stop frame (120) consists of a profiled section which has a receiving region (150) for an air-conditioning duct (160).