Rail Vehicle Coupling Head End Plate Recess Design
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Solution Overview
Problem
Rail vehicle coupling heads face issues with ice and snow accumulation on their end plates, which prevents proper coupling due to the lack of electrical heating in some applications, necessitating manual removal.
Innovation Solution
An end plate design with a recessed contact surface and strategically positioned contact surface segments that allow snow to escape during coupling, minimizing the risk of accumulation and enabling effective coupling without electrical heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electric heating of the end plate is provided to melt ice and snow accumulations, then the coupling head remains free of ice and snow, but electrical energy is required which is not available in freight couplings
Solution Approach 1:
The end plate is designed to automatically remove snow and ice accumulations during the coupling process itself, without requiring external energy input. The coupling action between two end plates creates relative movement that generates friction and compression forces, which naturally clear snow and ice from the contact surfaces and coupling elements.
Solution Approach 2:
The harmful snow and ice accumulations are extracted from the coupling interface during the coupling process. The design allows snow and ice to be removed from the contact surfaces and coupling elements as the end plates move together and lock, eliminating the need for pre-cleaning or heating.
2Ease of operation
If manual removal of ice and snow accumulations is performed, then the end plate can be coupled properly, but manual intervention is required and productivity is reduced
Solution Approach 1:
The coupling mechanism performs the cleaning function automatically during the coupling operation itself. The relative movement and compression forces generated when two end plates couple together naturally clear snow and ice from the contact surfaces, eliminating the need for separate manual cleaning operations.
Solution Approach 2:
The snow and ice removal function is merged with the coupling operation. The same mechanical action that couples the end plates together also clears the contact surfaces of snow and ice accumulations, combining two functions into one operation.
3Force
If the end plate has a smooth contact surface for force transmission, then compressive forces are transmitted effectively, but snow and ice accumulations prevent proper coupling
Solution Approach 1:
The contact surface of the end plate is segmented into multiple discrete contact areas rather than a single smooth surface. This segmentation allows snow and ice accumulations to be bridged or compressed out during coupling, while the distributed contact areas maintain effective force transmission capability.
Solution Approach 2:
The end plate design incorporates dynamic elements that adapt during the coupling process. The contact surfaces and coupling elements are designed to move and compress in a way that naturally clears snow and ice accumulations while maintaining force transmission throughout the coupling sequence.
Data Source
Figure 1~2
AI summary
The invention relates to an end plate (10) for a rail vehicle coupling head with coupling elements, comprising a coupling projection (1) extending forward from the end plate (10), and a coupling opening (6) for receiving a coupling projection of corresponding coupling elements of a compatible end plate, wherein the end plate (10) has an end-face contact surface (7) for receiving compressive forces when coupling the compatible end plate. The invention is characterized in that the end-face contact surface (7) is provided with at least one recess (3) positioned outside the coupling elements, which is at least partially open at the edge, and that at least one open-edge recess (3) has a base surface that is set back by at least 2.5 mm or at least 5 mm from the contact surface (7).