Transitional Door Device with Gear Lock for Large Vehicles

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Solution Overview

Problem

Existing transitional door devices for large-scale public transport vehicles, such as rail vehicles, lack flexibility and stability, particularly in areas with gear gorges, leading to issues with vandalism, increased maintenance, and fire protection concerns.

Innovation Solution

A transitional door device with an upper part featuring two sliding door wings and a lower part with two swiveling door leaves, where the door leaves are mechanically coupled with the door wings to facilitate a coordinated opening and closing movement, and are designed to be securely stored in a maintenance position.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If door leaves are fixed in position for stability, then reliability improves, but ease of repair deteriorates

Engineering Contradiction:

ImprovestabilityVSAvoidmaintenance accessibility

Core Design Contradiction:

ReliabilityVSEase of repair

Solution Approach 1:

The door assembly is segmented into fixed door wings and movable door leaves. The door leaves can be independently removed from the door wings, allowing maintenance personnel to access and service the door leaves without disturbing the stable fixed structure of the door wings.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The door leaves are designed with dynamic characteristics, allowing them to be moved between operational and maintenance positions. This dynamic capability enables easy removal and reinstallation of door leaves for maintenance while maintaining structural stability when installed.

Inventive Principle:

Principle #15Dynamics

2Reliability

If door leaves are securely fixed during operation, then reliability improves, but ease of operation deteriorates

Engineering Contradiction:

Improvesecurity against vandalismVSAvoidmaintenance operation

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The door system is divided into fixed door wings that provide structural security and movable door leaves that can be easily operated for maintenance. The fixed door wings remain securely attached to the vehicle body, providing anti-vandalism security, while the door leaves can be independently removed by maintenance personnel.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The door leaves are designed to be dynamically removable and reattachable, allowing easy operation during maintenance while maintaining security during normal operation. The mechanical coupling system enables simple attachment and detachment operations.

Inventive Principle:

Principle #15Dynamics

3Reliability

If door leaves are mechanically coupled to door wings, then reliability improves, but device complexity increases

Engineering Contradiction:

Improvecoordinated movementVSAvoidmechanical coupling structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The mechanical coupling system is segmented into discrete coupling elements that connect door leaves to door wings. These coupling mechanisms are designed as separate, standardized components that provide reliable coordinated movement without requiring complex integrated structures.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentEP4530148A1Transitional door device for a large sized vehicle with gear lock

Publication Date: 2025.04.02 SIEMENS MOBILITY GMBH

Figure 1~2
Figure 3~4
Figure 5~6

AI summary

The invention relates to a transition door device (1) for a public transport vehicle with a passageway and to a vehicle with a transition door device (1), wherein the transition door device (1) comprises an upper part (11) and a lower part (12), wherein the upper part (11) has two oppositely sliding door leaves (3, 5) and the lower part (12) has two oppositely pivoting door leaves (4, 6).