Spring-Centered Coupling Arm Support for Compact Train Retrofit
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Solution Overview
Problem
Conventional support and centering devices for automatic train couplings are heavy, complex, and require significant installation space, making them difficult to retrofit and operate, especially when deflected manually for tight curves.
Innovation Solution
A modular, lightweight support and centering device with a spring-supported mechanism that uses spring force for centering, reducing manual effort and installation space, featuring a crossbeam with return levers and friction elements for deflection and alignment, allowing easy retrofitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rigid or spring-mounted coupling support beam with pendulum suspension is used, then the coupling arm returns to center through weight forces, but the device becomes heavy and complex
Solution Approach 1:
The invention changes the fundamental parameter of the centering mechanism from weight-force-based (gravitational) to spring-force-based (elastic). The support beam is mounted on compression springs that provide the centering force, eliminating the need for heavy pendulum suspension and complex pre-deflection devices. This parameter change resolves the contradiction by maintaining reliable center return while dramatically reducing device complexity and weight.
Solution Approach 2:
The invention segments the coupling support structure into modular components: a console, a support beam with integrated centering function, and compression springs. This segmentation allows the centering function to be achieved through simple spring elements rather than a complex integrated pendulum system, reducing overall device complexity while maintaining functionality.
2Reliability
If heavy weight forces are used for center return, then the coupling arm centers reliably, but manual deflection becomes difficult
Solution Approach 1:
By changing the centering force from gravitational (weight-based) to elastic (spring-based), the invention creates a system where the spring constant can be optimized to provide sufficient centering force while allowing easy manual deflection. The spring force is adjustable and controllable, unlike fixed weight forces, enabling both reliable centering and ease of operation.
Solution Approach 2:
The spring-mounted support beam provides sufficient centering force for normal operation but allows partial deflection when manual force is applied. The spring can be compressed beyond its equilibrium position during manual deflection, storing energy that assists the operator, then releases to return the beam to center, making operation easier while maintaining reliable centering.
3Adaptability or versatility
If a pre-deflection device is added to hold the coupling arm in deflected position, then coupling on tight curves is enabled, but design complexity increases
Solution Approach 1:
The invention extracts the pre-deflection function from a separate complex device and integrates it into the support beam itself. The support beam, when deflected, is held in position by the spring force and friction between the beam and coupling arm, eliminating the need for additional pre-deflection mechanisms. This extraction reduces device complexity while maintaining adaptability for tight curve coupling.
Solution Approach 2:
The support beam with spring mounting provides self-service by automatically holding the deflected position through spring force and friction, without requiring separate locking mechanisms or pre-deflection devices. The system uses its own components (spring and beam friction) to maintain the deflected state, reducing overall device complexity while enabling coupling on tight curves.
4Ease of manufacture
If separate support and centering devices are arranged on the vehicle, then functional concentration is achieved, but installation space and mounting requirements increase
Solution Approach 1:
The invention merges the support function and centering function into a single integrated support beam assembly mounted on the console. The support beam provides both structural support for the coupling arm and automatic centering through its spring mounting. This merging eliminates the need for separate support and centering devices, reducing installation space and simplifying mounting requirements while maintaining functional concentration.
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 provides a cost-effective, space-efficient design that simplifies manual deflection and retrofitting, reducing stress on components and enhancing operational ease and durability.
Implementation Method 1
The coupling arm is resiliently supported in a centering position by at least one spring mounted on the console
Implementation Method 2
The support has a friction element on its surface facing the receiving space, which increases a coefficient of static friction between the support and the coupling arm
Data Source
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AI summary
The invention relates to a supporting and centering device for a coupling arm of an automatic train coupling, in particular a central buffer coupling, said device comprising: a resiliently supported support for the coupling arm; a stationary console for connection to a wagon or rail vehicle on which the support is at least indirectly resiliently suspended; and a central reset for the coupling arm. The support and centering device according to the invention is characterised in that the central reset comprises at least two resetting levers which face one another in the horizontal direction in each case with a lateral contact surface and which enclose a receiving space between them for the coupling arm above the support, wherein at least one spring accumulator is provided which applies a spring force to the resetting levers which counteracts a movement of the lateral contact surfaces apart from each other.