Straddle Monorail Rail with Integrated Escape Passage

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Solution Overview

Problem

Straddle-type monorail trains have high costs, occupy large spaces, and pose stability hazards due to the complex structure of independent escape passages that are not integrated into the rail itself, leading to increased workload and weight on the rail.

Innovation Solution

A rail transport system with a concave portion on the rail and a bogie with a second concave portion for straddling, allowing the escape passage to be integrated into the rail, reducing additional structures and weight, and featuring a vehicle body with emergency doors and a telescopic escape ladder for efficient evacuation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If an independent escape passage structure is additionally disposed on the rail, then passenger evacuation capability is improved, but device complexity and cost are increased

Engineering Contradiction:
Improvepassenger evacuation capabilityVSAvoidstructure complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The escape passage is merged with the rail structure itself. The rail is designed with a hollow interior space that serves as the escape passage, eliminating the need for separate escape passage structures. This integration reduces device complexity while maintaining evacuation capability, as the rail's internal cavity becomes the evacuation route for passengers during emergencies.

Inventive Principle:
Principle #5Merging (Combining)

2Reliability

If an independent escape passage structure is additionally disposed on the rail, then passenger evacuation capability is improved, but cost is increased

Engineering Contradiction:
Improvepassenger evacuation capabilityVSAvoidmanufacturing cost
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The escape passage function is combined with the rail structure, so that the rail serves dual purposes: supporting the vehicle during normal operation and providing an escape route during emergencies. This eliminates the need to manufacture and install separate escape passage structures, floor panels, and supporting frameworks, thereby significantly reducing manufacturing costs and workload.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The rail is designed as a multi-functional component that simultaneously performs structural support functions during normal operation and serves as an escape passage during emergencies. The hollow interior of the rail provides the evacuation route, making the rail itself a universal structure that combines load-bearing and emergency evacuation functions, thus reducing overall system cost.

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

3Reliability

If the escape passage structure and floor are disposed at the side portion of the rail, then passenger evacuation capability is improved, but occupied space is increased

Engineering Contradiction:
Improvepassenger evacuation capabilityVSAvoidoccupied space
Core Design Contradiction:
ReliabilityVSArea of stationary object

Solution Approach 1:

The escape passage is nested within the hollow interior space of the rail structure. Instead of extending outward from the rail, the evacuation route is contained within the rail's internal cavity. This nesting approach allows the escape passage to utilize the existing rail volume, minimizing the additional space required and maintaining a compact overall structure.

Inventive Principle:
Principle #7Nested doll (Nesting)

4Reliability

If the escape passage structure and floor are mounted on the rail, then passenger evacuation capability is improved, but weight of the rail is increased

Engineering Contradiction:
Improvepassenger evacuation capabilityVSAvoidrail weight
Core Design Contradiction:
ReliabilityVSWeight of moving object

Solution Approach 1:

The escape passage is merged into the rail's hollow structure, eliminating the need for separate escape passage components, supporting frameworks, and floor panels that would otherwise need to be mounted on the rail. This integration removes the additional weight of independent structures while maintaining the evacuation function through the rail's internal cavity.

Inventive Principle:
Principle #5Merging (Combining)

Data Source

PatentUS11173930B2Rail transport system
Publication Date: 2021.11.16 BYD CO LTD
  • US11173930B2 patent drawing
  • US11173930B2 patent drawing
  • US11173930B2 patent drawing

AI summary

A rail transport system includes a rail (10) provided with a first concave portion built thereon, and a rail vehicle comprising a bogie (21) and a vehicle body (22). The bogie (21) has a second concave portion (110) for straddling the rail (10), the bogie (21) movably straddles the rail (10), and the vehicle body (22) is connected to the bogie (21) and is pulled by the bogie (21) to run along the rail (10). The rail transport system according to embodiments of the present disclosure has the advantages of simple structure, low cost, small occupied space, and high stability.