Rail Fastener Guide Block for Automated Installation
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Solution Overview
Problem
Existing rail fastening systems are poorly suited for automated installation due to issues with incorrect angular positioning of the elastic attachment during transition, risk of damage to plastic components, water stagnation, and accumulation of foreign bodies, which complicates the final positioning of rails and requires manual intervention.
Innovation Solution
A rail fastening system with a lateral abutment featuring a guide block that ensures the elastic attachment moves only perpendicular to the rail support edge, using a raised block for precise guidance and a washer for secure anchoring, preventing foreign body accumulation and facilitating automated assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the elastic fastener is allowed to move freely during transition from standby to mounting position, then the installation process is simpler, but the fastener rotates around the anchoring device axis causing incorrect angular positioning
Solution Approach 1:
A guide block is introduced as an intermediary element between the elastic fastener and the anchoring device. The guide block constrains the fastener's movement path, allowing it to transition from standby to mounting position while preventing rotation around the anchoring device axis, thus ensuring correct angular positioning
Solution Approach 2:
The guide block is divided into two functional parts: a first portion that guides the elastic fastener during transition, and a second portion that acts as a bearing surface for the fastener in the mounting position. This segmentation allows each part to optimize its specific function
2Ease of operation
If lateral guide blocks are positioned at the rear of the lateral stop, then the fastener is guided during movement, but the fastener cannot be fully extended without risking damage to the plastic base
Solution Approach 1:
The guide block is positioned in a different spatial dimension - extending from the bearing edge of the lateral stop rather than being located at the rear. This dimensional change allows the fastener to be guided during transition while providing sufficient extension space that prevents damage to the plastic base
3Ease of operation
If the fastener drops into a U-shaped recess at the end of travel, then the fastener is contained, but water stagnation and foreign body accumulation occur
Solution Approach 1:
The U-shaped recess is completely removed from the design. Instead, the guide block's second portion provides a bearing surface that contains the fastener at the end of its travel without creating a recess space where water and foreign bodies could accumulate
Solution Approach 2:
The design converts the potential harm of needing fastener containment into a benefit by using the guide block's bearing surface to both contain the fastener and prevent water/foreign body accumulation, eliminating the harmful effect rather than just managing it
4Manufacturing precision
If manual intervention is required for each fastener during welding removal, then precise positioning can be achieved, but the assembly process slows down significantly
Solution Approach 1:
The guide block's geometry is designed to automatically guide the elastic fastener into the correct angular position and maintain it during the entire transition from standby to mounting position. This self-guiding mechanism eliminates the need for manual intervention during welding removal while maintaining precise positioning, thereby increasing assembly speed
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 enables precise and automated installation of rail fasteners, preventing damage and ensuring correct positioning, reducing the risk of oxidation and foreign body interference, and allowing for easy removal and repositioning during welding.
Implementation Method 1
an elastic fastener generally made of steel wire... to put said elastic fastener under stress when a part of it rests on a rail heel
Data Source
Figure 1~2
Figure 3~6
Figure 5
AI summary
The rail attachment system comprises a lateral stop (19), an elastic fastener (17) and an anchoring device and is characterised in that the elastic fastener comprises a U-shaped central loop (42) and in that the lateral stop comprises an elevated guide block (39) to guide the central loop so that, while being fitted, the fastener moves in a direction perpendicular to the rail.