Railway Vehicle Body Coupling Device for Impact Safety
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current railway vehicle body designs fail to adequately protect the driver in the event of a frontal impact, particularly when a truck trailer collides with the high body, as the lightweight structure compromises visibility and safety standards.
Innovation Solution
A hooking device connects the high body to the low body, switching from a floating configuration to a restraint configuration during high frontal impacts, limiting vibrations and movements of the high body relative to the low body, thereby preserving the driver's survival space while maintaining visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the high body is made of lightweight materials to reduce mass, then the mass of the vehicle is reduced, but the strength and ability to protect the driver in frontal impact is compromised
Solution Approach 1:
The high body is constructed using composite materials that combine lightweight properties with enhanced strength characteristics, allowing the structure to remain light while providing adequate protection against frontal impacts
Solution Approach 2:
The connection between the high body and low body is designed to be dynamic, allowing controlled movement during normal operation to absorb vibrations, while providing rigid restraint during frontal impact to maintain survival space
2Strength
If the high body is made rigid to protect the driver in impact, then the driver's protection is improved, but the visibility from the driver's station is reduced
Solution Approach 1:
The high body is segmented into multiple sections with strategic openings and window arrangements that maintain structural rigidity while providing sufficient visibility corridors for the driver to observe the external environment
Solution Approach 2:
Different regions of the high body have different structural properties - areas requiring strength are reinforced while areas requiring visibility maintain lighter construction with optimized opening configurations
3Ease of operation
If the high body is allowed to move relative to the low body to absorb vibrations, then the driving comfort is improved, but the survival space is compromised during frontal impact
Solution Approach 1:
The connection system between high body and low body is designed with dynamic characteristics that allow controlled relative movement during normal operation to isolate vibrations, while providing rigid mechanical restraint during frontal impact to maintain survival space integrity
Solution Approach 2:
The connection system changes its mechanical parameters based on load conditions - exhibiting flexible, vibration-damping characteristics during normal operation and rigid, load-bearing characteristics during frontal impact
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
The solution effectively prevents upward and rearward movements of the high body during impacts, ensuring driver safety and maintaining outward visibility, while also reducing vibration transmission in normal operation for improved comfort and fatigue resistance.
Implementation Method 1
limits the transmission of vibrations between the high body and the low body
Implementation Method 2
attachment device limits the movements of the high body relative to the low body
Implementation Method 3
when the high body is subjected to a high frontal impact, which generates an impact force oriented towards the rear direction and which deforms the high body
Implementation Method 4
the attachment device passing into the retaining configuration
Data Source
Figure 1
Figure 2
Figure 3
AI summary
This body (20) includes a driver's position located at one front end (20A) of the body. The body comprises an upper section (40), in which an opening (44) is provided to allow forward visibility, a lower section (30) that supports the upper section, and a coupling device that connects the upper section to the lower section and is arranged at the front of the body (20). The coupling device includes a hook, which is fixed to the upper section and is received in an opening provided in a plate integral with the lower section.The lashing device is configured to transition from a floating configuration, where the lashing device limits the transmission of vibrations between the upper and lower crates, to a restraining configuration, in which the lashing device limits the rearward and upward movement of the upper crate relative to the lower crate when the upper crate is subjected to a high frontal impact that deforms the upper crate rearward.