Emergency Catch Device for Rail Sedan Cars
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Solution Overview
Problem
Existing emergency safety systems for coupled rail vehicles, particularly sedan chairs without a chassis, fail to prevent tipping when anti-roll supports fail, posing a dangerous situation, especially in configurations where redundancy is not feasible.
Innovation Solution
An emergency safety device comprising a first guide device with a recess and a second guide device with a pin, designed to engage without contact, which holds the sedan chair in place if the anti-roll support fails, allowing for continued operation with minimal tilting and preventing falls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a roll support is used to prevent the sedan wagon from tipping, then the stability of the sedan wagon is improved, but if the roll support fails, the sedan wagon can tip over creating a dangerous situation
Solution Approach 1:
The patent implements an emergency arresting device with a guide device comprising a recess and a pin that engages in the recess without contact during normal operation. This device is pre-positioned to automatically activate when the roll support fails, cushioning the harmful effect by preventing the sedan wagon from tipping over and creating only a slight tilting effect instead.
2Reliability
If the pin is guided in the recess without play, then the emergency arresting device provides maximum stability, but constraining forces occur during cornering and trough passage that can damage the device
Solution Approach 1:
The patent applies local quality by creating a play or clearance between the pin and the recess walls during normal operation. This localized freedom of movement allows the guide device to accommodate dynamic forces during cornering and trough passage without generating damaging constraining forces, while still providing effective arresting capability when needed.
Data Source
Figure 1~2
Figure 3~4
AI summary
An emergency catch device (1) for two coupled-together rail vehicles (9, 10), wherein one of the rail vehicles (9, 10) is a sedan car without running gear, and wherein the rail vehicles (9, 10) are connected by means of an anti-roll support (11, 12, 13), wherein a first guide device (2) is designed for arranging on a first rail vehicle (9), which first guide device comprises a recess (4), and a second guide device (3), which is designed for arranging on a second rail vehicle (10), comprises a pin (5), wherein, in the usage position installed on the rail vehicles, the pin (5) is guided in the recess (4) in a contact-free manner.