Extendable Rail Coupler for Dynamic Gap Bridging
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Solution Overview
Problem
Current coupling methods for rail vehicles are inefficient, requiring physical shunting at low speeds, leading to energy wastage and operational challenges, and lack interoperability, resulting in unreliable and time-consuming processes that limit train capacity adjustments.
Innovation Solution
An extendable coupler system that allows rail vehicles to couple and uncouple independently of their movement, featuring a rotating cylindrical mechanism with a motor-driven pulley system, enabling controlled extension and retraction, and a gimbal frame for dynamic positioning, along with a covering arrangement to protect the coupling head.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If physical shunting is used to couple rail vehicles, then coupling can be achieved, but the process requires low speeds and considerable time and energy to overcome starting inertias
Solution Approach 1:
The coupler incorporates an extendable coupling head that can dynamically adjust its length between retracted and extended positions. This dynamic extension allows the coupler to bridge gaps between vehicles during approach and maintain connection during coupling, eliminating the need for precise low-speed shunting and reducing coupling time while ensuring reliable connection.
Solution Approach 2:
The coupler system performs preliminary extension of the coupling head before actual engagement to accommodate the approach of vehicles. This preliminary action allows the system to prepare for coupling by extending the coupling head in advance, eliminating the need for vehicles to stop and restart multiple times, thereby reducing overall coupling time and energy consumption.
2Speed
If the final drive forward is carried out over enthusiastically, then coupling speed is improved, but heavy jolts are induced that risk shaking passengers and damaging items
Solution Approach 1:
The extendable coupling head provides a dynamic buffer during coupling by extending to accommodate relative movement between vehicles. This dynamic extension absorbs the energy of approaching vehicles gradually, converting sudden jolts into controlled extension motion, thereby maintaining high coupling speed while minimizing harmful vibrations and shocks to passengers and cargo.
Solution Approach 2:
The coupler system incorporates a cushioning mechanism through the extendable coupling head that anticipates and absorbs impact forces before they reach the vehicle bodies. By extending the coupling head in advance and maintaining connection during approach, the system cushions against sudden jolts and vibrations, protecting passengers and cargo while enabling rapid coupling.
3Productivity
If the coupling process is made automated with motor-driven extension, then coupling efficiency is improved, but device complexity increases
Solution Approach 1:
The coupler system incorporates a motor-driven extension mechanism that automatically extends the coupling head without requiring manual intervention or complex external control systems. The self-service extension is triggered by the approach of another vehicle and occurs automatically, improving coupling efficiency while keeping the added complexity contained within the coupler itself rather than requiring external automation infrastructure.
Solution Approach 2:
The extendable coupling head serves multiple functions: it acts as both the coupling interface and the extension mechanism, combining what would traditionally be separate components into a single multi-functional element. This universality improves coupling efficiency by eliminating the need for separate extension and coupling systems, thereby reducing overall device complexity despite the added motor-driven capability.
4Adaptability or versatility
If extendable coupling head is used, then coupling can occur at greater distances and interoperability is improved, but the coupling head requires protection when not in use
Solution Approach 1:
The coupling head is nested within a protective housing that encloses it when not in use. This nesting arrangement protects the extendable coupling head from environmental factors and damage while allowing it to extend outward when needed for coupling. The protective housing acts as a shield that prevents harmful factors from affecting the coupling mechanism, enabling the system to maintain adaptability without exposing vulnerable components.
Solution Approach 2:
The protective housing incorporates a dynamic opening mechanism that automatically opens when another vehicle approaches and closes when the coupling head retracts. This dynamic protection allows the coupling head to remain exposed during coupling operations for maximum adaptability while being protected during storage, eliminating the need for manual protection and maintaining system versatility without compromising component safety.
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
Enables efficient and synchronized coupling and uncoupling processes, reducing energy wastage, improving operational safety, and enhancing interoperability among different rail vehicles, allowing for flexible train formations and reduced wear on vehicles and tracks.
Implementation Method 1
an extending mechanism arranged to extend the coupling body from the support housing along the longitudinal axis of the coupling body
Implementation Method 2
a motor-driven pulley system, enabling controlled extension and retraction
Implementation Method 3
a gimbal frame for dynamic positioning
Data Source
Figure 1
Figure 2(a)~2(c)
Figure 3(a)~3(b)
AI summary
A coupler for coupling rail vehicles together comprising: an extendable coupling body; an extending mechanism; and a support housing for mounting the coupler to a railway carriage, wherein the coupling body and the extending mechanism are mounted within the support housing, the extending mechanism being arranged to move the coupling body relative to the support housing between a retracted position and an extended position; wherein the coupling body comprises a coupling interface that is arranged to receive connections of the railway carriage for coupling to a coupling interface of a second coupler; wherein a distance between the coupling interface and the support body increases as the coupling body moves from the retracted position towards the extended position; and wherein the coupling interface is arranged to engage the coupling interface of the second coupler upon contact between the interfaces.