C-Shaped Rail Door Stabilization for Transit Vehicles

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Solution Overview

Problem

Modern public transportation vehicles face safety and maintenance issues due to doors that pop out and slide along the outer shell, which are not adequately secured, leading to potential safety hazards and increased maintenance costs, especially on inclines and declines.

Innovation Solution

A door assembly system featuring a C-shaped rail coupled to the outer shell and a coupling component on the inner door surface, allowing the door to slide securely and stabilize when open, using a kit that includes a C-shaped rail and coupling component for installation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the door is designed to pop out and slide along the outer shell to open the entryway, then the door can be opened in tight spaces and crowded buses, but the door is not adequately secured when open, creating safety hazards and strain on operating mechanisms

Engineering Contradiction:

Improvedoor opening capability in tight spacesVSAvoiddoor security when open

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

A C-shaped rail is introduced as an intermediary component between the door and the vehicle body. The rail receives the door when opened and provides a stable resting position, preventing the door from swinging uncontrollably while maintaining the sliding opening mechanism's adaptability to tight spaces

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The door opening mechanism transitions from a simple sliding motion to a three-dimensional path where the door pops out, slides along the outer shell, and then engages with the C-shaped rail at a different spatial level, creating a more stable final position

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If the door slides along the outer shell without adequate support, then the door can open in limited space, but significant strain is placed on the operating wiring and mechanisms

Engineering Contradiction:

Improvedoor opening in limited spaceVSAvoidstrain on operating mechanisms

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The C-shaped rail acts as a mechanical intermediary that supports the door's weight and stabilizes it in the open position, eliminating the need for continuous tension on the operating wiring and mechanisms while preserving the compact opening capability

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If the door is not securely anchored when full open, then the door can be opened in tight spaces, but the exposed end creates safety hazards and potential door failure

Engineering Contradiction:

Improvedoor opening in tight spacesVSAvoidsafety hazards from unsecured door

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The C-shaped rail serves as a protective intermediary structure that physically contains and secures the door in the open position, preventing it from swinging into passengers or detaching, while allowing the door to maintain its space-efficient sliding opening path

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The C-shaped rail is positioned to receive and support the door before any potential unsafe conditions can develop, providing preemptive stabilization that prevents safety hazards rather than reacting to them after they occur

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Data Source

PatentUS10391845B2Door assembly stability systems for public transportation

Publication Date: 2019.08.27 RAILCAR PARTS MFG

AI summary

A door assembly system for public transportation that includes: a public transportation vehicle having an outer shell and an inner passenger compartment; at least one door having an outer surface, an inner surface, a top, a bottom and two sides, wherein the door slides to open so that passengers can enter or exit the inner passenger compartment; a C-shaped rail, wherein the rail is coupled to the outer shell of the vehicle; and a coupling component that is coupled to the inner surface of the door and is designed to mate with or engage with the C-shaped rail in a slideable manner. A method of securely opening a door on public transportation that includes: providing a train, bus or public transportation vehicle having an outer shell and an inner passenger compartment; providing at least one door having an outer surface, an inner surface, a top, a bottom and two sides, wherein the door slides to open so that passengers can enter or exit the inner passenger compartment; providing a door assembly kit, the kit comprising a C-shaped rail and a coupling component; installing the C-shaped rail to the outer shell of the vehicle; installing the coupling component to the inner surface of the door, opening the door; and mating or engaging the coupling component with the C-shaped rail in a slideable manner.