Tunnel-Shaped Switch Cover With Sliding Caps
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Solution Overview
Problem
Existing cover designs for drive, locking, and testing rods in trough sleepers are insufficiently protected against mechanical stresses, icing, and contamination, particularly during track maintenance, and lack sufficient mechanical strength and sealing capabilities.
Innovation Solution
A central, tunnel-shaped cover with a U-shaped cross-section and displaceable cover caps that engage over or under the central cover, providing enhanced stability and protection against mechanical influences, icing, and contamination, while allowing for compensation of movement with the sliding switch parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a plate with openings is used to cover the trough sleeper, then the structure is simple, but the mechanical strength is insufficient and protection against mechanical stresses is poor
Solution Approach 1:
The cover is divided into a central tunnel-shaped cover and separate lateral cover caps that can be assembled independently. This segmentation allows each component to be optimized for its specific function while maintaining overall structural integrity and ease of assembly.
Solution Approach 2:
The invention combines a metal central tunnel-shaped cover with plastic lateral cover caps to create a composite structure that leverages the high mechanical strength of metal where needed while using the corrosion-resistant and lightweight plastic properties for the lateral protection elements.
2Object-affected harmful factors
If lateral cover caps are added to protect connection areas, then protection against mechanical influences and icing is improved, but the device complexity increases
Solution Approach 1:
The lateral cover caps are designed to engage with and nest around the central tunnel-shaped cover, creating a layered protective structure where simpler components combine to provide comprehensive protection without requiring a completely complex integrated design.
Solution Approach 2:
The lateral cover caps are made displaceable relative to the central cover, allowing them to move dynamically with the switch parts during operation while maintaining protection. This dynamic capability is achieved through guided movement along the central cover.
3Reliability
If the axial length of the central tunnel-shaped cover is limited to avoid collision with switch parts, then the risk of collision is reduced, but the protection coverage of sensitive areas is decreased
Solution Approach 1:
The protective cover system is segmented into a central tunnel-shaped cover with limited axial length for collision avoidance, and separate lateral cover caps that extend the protection coverage to the connection areas without increasing the collision risk of the central portion.
Solution Approach 2:
Instead of extending the central cover axially in one dimension to protect lateral areas, the invention uses lateral cover caps that extend protection in the radial/lateral dimension, thereby maintaining collision avoidance while achieving comprehensive area coverage.
4Object-affected harmful factors
If telescopically displaceable plates are used to improve sealing, then protection against dust and ice is improved, but the mechanical load capacity is limited due to gap risks
Solution Approach 1:
The lateral cover caps are designed with flexible sealing elements that can deform and adapt to the movement of switch parts, providing effective sealing against dust and ice without requiring rigid telescopic structures that would be mechanically weak.
Solution Approach 2:
The combination of metal central cover and plastic lateral caps creates a composite structure where the plastic caps can provide flexible sealing while the metal central cover maintains high mechanical load capacity.
Data Source
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AI summary
In a cover for the drive, locking, and/or test linkage of a switch drive arranged in or above a trough sleeper (1), a central, tunnel-shaped cover (2) with a substantially U-shaped cross-section is provided, open towards the trough sleeper (1). The axial length of this cover in the direction of the trough sleeper (1) is dimensioned to prevent collisions with movable switch components, in particular switch rails (5). Cover caps (3) coupled to the movable switch components in their direction of movement are provided. These cover caps overlap the central, tunnel-shaped cover (2) and are slidably guided on it.