Rail Fastening Angled Guide Plate Height Compensation
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Solution Overview
Problem
Existing rail fastening systems for slab tracks require additional fasteners and face challenges in evenly distributing shear forces due to component tolerances, especially when height adjustments are needed for high-speed routes or noise reduction applications.
Innovation Solution
The rail fastening system incorporates an angled guide plate and a shoulder part that form a secure, form-fitting connection with the subsoil, allowing for height compensation without additional fasteners like screws and dowels, and includes a spacer plate to manage tolerances, ensuring reliable force transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If support brackets are used to fix the position of angled guide plates for height adjustment, then height compensation is achieved, but the number of fasteners increases from two to four per anchorage and the system becomes overdetermined
Solution Approach 1:
The patent combines the height adjustment function with the existing anchorage system by integrating the angled guide plate design to work with spacer plates. The angled guide plate maintains its form-fitting connection with the base plate while accommodating height variations through the spacer plate mechanism, eliminating the need for separate support brackets and additional fasteners.
Solution Approach 2:
The angled guide plate is designed to perform multiple functions: it provides lateral support, transmits transverse forces, and works with spacer plates for height adjustment. This multi-functional design allows the same component to handle both positioning and height compensation without requiring additional specialized fastening elements.
2Adaptability or versatility
If multiple fasteners are installed to accommodate component tolerances and height adjustments, then adaptability improves, but the difficulty in evenly distributing shear force among fasteners increases
Solution Approach 1:
The patent applies local quality by creating a form-fitting connection between the angled guide plate and the base plate through precisely shaped recesses and protrusions. This localized geometric matching ensures that shear forces are distributed evenly across the contact surfaces, eliminating the need for multiple discrete fasteners and the associated problems of uneven force distribution.
3Adaptability or versatility
If the rail base plate is lifted by a spacer plate for height adjustment, then height compensation is achieved, but ensuring safe transmission of transverse wheel force becomes more difficult
Solution Approach 1:
The angled guide plate serves as an intermediary element between the spacer plate and the base plate. It transfers transverse forces from the rail base plate through its form-fitting connection with the base plate, ensuring reliable force transmission even when height adjustment is required. The angled geometry of the guide plate is specifically designed to redirect transverse forces into the base plate effectively.
Data Source
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AI summary
Rail fastening system for fastening a rail (2) to a substrate (3), preferably a solid roadway, comprising at least one retaining member (6) for mounting the rail (2) on the substrate (3), wherein the retaining member (6) has: an angle guide plate (8) which is configured to transfer transverse forces from the rail (2) to the substrate (3) in the mounted state; and a shoulder part (11) which is configured to lie flush against the angle guide plate (8) in the mounted state and to be positively engaged in a recess (3a) of the substrate (3).