Rotatable Replacement Rail Support for Sleeper Fit and Torsion Control
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Solution Overview
Problem
Existing support devices for replacement rails in railroad tracks suffer from rigidity issues leading to torsion, are costly due to strong magnetization requirements, and are fragile, with designs incompatible with certain sleepers and fastening systems.
Innovation Solution
A support device with a first part attachable to a running rail and a second part rotatable relative to the first, allowing easy attachment to sleepers, featuring electrical insulation and locking mechanisms to secure the replacement rail, reducing torsion and ensuring compatibility with various sleeper heights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rigid L-shaped support device is used to hold replacement rails, then the rail is securely supported, but significant torsion occurs on the rail in use
Solution Approach 1:
The support device incorporates a movable second part that can rotate relative to the first part about a longitudinal axis. This dynamic configuration allows the device to adapt to sleeper height variations and ballast conditions, reducing torsional stress on the rail while maintaining support stability. The rotational degree of freedom enables the structure to respond to operational loads without generating harmful torsion.
2Reliability
If strong magnetization is used to guarantee permanent attachment of the support device to the running rail, then attachment reliability is improved, but the device becomes potentially very costly and not guaranteed
Solution Approach 1:
The patent replaces the magnetization-based attachment system with a mechanical clamping system. The first part includes clamping means that mechanically secure the device to the running rail through friction and mechanical interlocking, eliminating the need for strong magnetization. This substitution reduces manufacturing costs while maintaining reliable attachment, as the mechanical system provides consistent holding force without the variability and cost associated with powerful magnets.
3Adaptability or versatility
If the support device is designed to be compatible with all sleeper types and fastening systems, then versatility is improved, but the device complexity increases
Solution Approach 1:
The support device is divided into two separate parts: a first part that attaches to the running rail and a second part that supports the replacement rail and interfaces with the sleepers. This segmentation allows each part to be optimized for its specific function. The first part handles rail attachment, while the second part adapts to various sleeper configurations through its rotational capability. This modular approach achieves versatility without requiring a single complex integrated structure.
Solution Approach 2:
The rotational connection between the first and second parts provides adaptability to different sleeper heights and fastening systems. The second part can rotate to accommodate variations in sleeper positioning, allowing the same device design to work with multiple sleeper types and fastening configurations. This dynamic adjustment mechanism achieves versatility while keeping the overall device structure relatively simple.
4Productivity
If the second part is arranged on two consecutive sleepers to enable simple and quick installation, then installation speed is improved, but the holding independent of ballast height becomes more difficult to achieve
Solution Approach 1:
The rotational articulation between the first and second parts enables the device to adapt to varying ballast heights while maintaining its function. The second part can rotate to accommodate different sleeper positions and ballast conditions, ensuring that the replacement rail is properly supported regardless of ballast height variations. This dynamic configuration allows quick installation on two consecutive sleepers while maintaining holding independence from ballast height.
Data Source
AI summary
A support device (10) for a replacement rail (RA) intended to be made integral with a running rail including a first part with removable fastening means (A1) for attachment to a foot (P) of a running rail (RC), and a second part (B) for receiving a replacement rail. The second part is rotatable about an axis (X) relative to the first part (A) and includes two lateral portions (B3, B4) extending in a first longitudinal direction (L1) parallel to the axis of rotation. The two lateral portions (B3, B4) each being designed to bear on a sleeper (T), the second part (B) including a lock for a replacement rail (RA) in at least one second direction (L2) perpendicular to the first longitudinal direction (L1).