Rail Vehicle Coupling Snow Protection Assembly
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Solution Overview
Problem
Snow accumulation in the coupling region of rail vehicles can lead to operational limitations and safety issues due to the design of couplings that are prone to snow filling, especially in extreme conditions, where existing solutions either require complex constructions or manual intervention.
Innovation Solution
A snow protection arrangement featuring a recess with a fixed housing and two sealing elements, one peripheral and one rotatable, that overlap to create a snow-tight seal around the coupling, allowing for horizontal and vertical pivoting while preventing snow penetration, and can be produced and retrofitted cost-effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the coupling is designed to allow horizontal and vertical pivoting for coupling operations and travel on bends, then the coupling can perform required functions, but snow accumulates in the funnel-like openings around the coupling
Solution Approach 1:
A flexible sealing element is introduced that can dynamically adapt to the coupling's angular positions while maintaining a snow-tight seal. The flexible membrane follows the coupling's movement in horizontal and vertical directions, preventing snow penetration without restricting the coupling's pivoting capability.
Solution Approach 2:
The sealing element is positioned and designed to prevent snow from entering the coupling region before accumulation can occur. The seal proactively blocks snow during normal operation and maintains effectiveness even when the coupling is in extended angular positions for coupling operations.
2Object-affected harmful factors
If a covering hood is used to protect the coupling from snow, then snow penetration is reduced, but manual assembly and disassembly time is required during coupling operations
Solution Approach 1:
The flexible sealing element automatically adapts to the coupling's position changes without requiring manual intervention. As the coupling pivots for coupling operations or travel, the sealing element self-adjusts to maintain the snow-tight seal, eliminating the need for operators to manually assemble or disassemble protective covers.
Solution Approach 2:
The sealing system transitions from a static covering hood to a dynamic flexible membrane that moves with the coupling. This dynamic design allows the seal to maintain effectiveness throughout the full range of coupling motion, including horizontal and vertical pivoting, without requiring manual reconfiguration.
3Ease of manufacture
If a strong tarpaulin covering hood is used to protect the coupling, then cost-effectiveness is achieved, but the hood does not always prevent snow penetration into the pivot region
Solution Approach 1:
The flexible sealing element provides superior snow protection compared to rigid tarpaulin hoods while maintaining cost-effectiveness. The flexible membrane conformally seals around the coupling and its pivot region, preventing snow penetration into areas that rigid covers cannot protect.
Solution Approach 2:
Instead of using a rigid external cover that attempts to shield the coupling, the solution uses a flexible seal that actively conforms to and seals the coupling region. This inverted approach of using flexibility rather than rigidity achieves both better protection and cost-effectiveness.
4Object-affected harmful factors
If the coupling region is completely sealed to prevent snow accumulation, then snow protection is improved, but the coupling cannot pivot for coupling operations and travel
Solution Approach 1:
The flexible sealing element creates a dynamic seal that moves with the coupling, maintaining snow protection while allowing full pivoting capability. Unlike rigid seals that would restrict motion, the flexible membrane accommodates horizontal and vertical angular positions required for coupling operations and travel on bends.
Solution Approach 2:
The sealing system transitions from a static sealed structure to a dynamic flexible seal that adapts to coupling motion. This dynamic design maintains the snow-tight seal during normal operation while allowing the coupling to pivot freely for coupling operations and navigating bends and points areas.
Data Source
AI summary
A snow protection assembly is provided for a coupling region of a rail vehicle. The rail vehicle has, on an end face, a recess which protects against snow, in which recess a coupling of the rail vehicle is arranged. A fixed housing partially extends around the recess. The housing has an opening in the direction of travel of the rail vehicle, from which opening the coupling partially protrudes to enable a process of coupling to an additional rail vehicle. The opening of the fixed housing is peripherally fixedly connected to a first sealing element. A second sealing element is rotatably connected to the coupling, and the second sealing element partially extends around the coupling. The two sealing elements partially overlap in the region of the opening. The two sealing elements are coupled to one another by pressure to protect the opening against the ingress of snow.