Rail Door Window Fixing With Mechanical Fast Exchange

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Solution Overview

Problem

Conventional methods for fixing window panes in rail vehicle door leaves, such as adhesive bonding, are inefficient, prone to vandalism, and require complex certification processes, while also limiting rapid exchangeability of the window panes.

Innovation Solution

A fixing device comprising a profile element, a window profile element, and a fastening device that uses screws to secure the window pane within a rubber profile, eliminating the need for adhesives and allowing for rapid installation and exchange.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If adhesive bonding is used to fix the window pane, then the window pane is securely fixed, but the installation time is long and exchangeability is poor

Engineering Contradiction:

Improvefixing securityVSAvoidinstallation time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent replaces adhesive bonding (chemical connection) with a mechanical fastening system consisting of a fastening device with engagement elements that mechanically connect the window pane to the door leaf. This substitution enables rapid installation and exchange while maintaining secure fixing, directly resolving the contradiction between fixing security and installation time.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If adhesive bonding is used to fix the window pane, then the window pane is securely fixed, but certification complexity increases

Engineering Contradiction:

Improvefixing securityVSAvoidcertification complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces adhesive bonding with a mechanical fastening system using standardized engagement elements and fastening devices. This mechanical approach eliminates the need for complex adhesive bonding certification processes, reducing certification complexity while maintaining secure fixing through proven mechanical connection methods.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of operation

If a rubber profile is used to fix the window pane, then the installation is simple, but the surface is not flush and exchangeability is limited

Engineering Contradiction:

Improveinstallation simplicityVSAvoidsurface flushness

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The patent divides the fixing system into separate functional components: a profile element for positioning, a fastening device with engagement elements for secure connection, and a cover element for aesthetic finishing. This segmentation allows each component to be optimized independently, achieving both simple installation and flush surface appearance.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a fastening device as an intermediary between the rubber profile and the window pane fixation. This fastening device includes engagement elements that connect to the window pane and a cover element that provides a flush surface, mediating between the simple rubber profile and the requirement for precise surface alignment.

Inventive Principle:

Principle #24Intermediary (Mediator)

4Reliability

If adhesive bonding is used to fix the window pane, then the window pane is securely fixed, but rapid exchangeability is prevented

Engineering Contradiction:

Improvefixing securityVSAvoidexchangeability

Core Design Contradiction:

ReliabilityVSEase of repair

Solution Approach 1:

The patent replaces adhesive bonding with a mechanical fastening system featuring reversible engagement elements. This mechanical connection can be quickly assembled and disassembled, enabling rapid exchangeability of window panes while maintaining secure fixing during operation, directly resolving the contradiction between fixing security and ease of repair.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

This solution enables faster installation, improved protection against vandalism, and simplified certification, while allowing for the window pane to be easily exchanged directly on the rail vehicle, and provides a flush surface without protruding rubber profiles.

Implementation Method 1

the profile element is formed from an elastic material

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS20250136156A1Fixing device and method for fixing a window pane of a window for a rail vehicle and window for a rail vehicle

Publication Date: 2025.05.01 KNORR BREMSE GMBH

AI summary

A fixing device configured to fix a window pane of a window in a door leaf of a rail vehicle, the fixing device including a profile element; a window profile element; and a fastening device, wherein the fastening device is configured to fasten the profile element and the window profile element at each other by positive form locking and/or friction locking, wherein the profile element is formed from an elastic material, wherein the profile element includes a recess portion configured to fit around a border region of the window pane, a mounting portion configured to mount a first part of the fastening device on the profile element by positive form locking, a cover portion configured to cover the fastening device, and a connection portion configured to connect the cover portion to the window profile element by positive form locking.