Rail Fastening System With Variable Elasticity Layer
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Solution Overview
Problem
Existing rail fastening systems for slab tracks are complex and expensive to manufacture and assemble due to the need for multiple elastic and highly elastic components to achieve required vibration properties, especially under high loads and speeds.
Innovation Solution
A simplified rail fastening system using a single elastic intermediate layer element with variable elasticity distribution, eliminating the need for additional highly elastic components and simplifying the assembly process, which includes a more elastic inner area surrounded by a less elastic outer area for enhanced stability and a hard trapezoidal intermediate layer element for transverse force distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple elastic and highly elastic components are used in the rail fastening system, then the required vibration properties and elasticity are achieved, but the manufacturing and assembly complexity increases significantly
Solution Approach 1:
The patent combines multiple elastic and highly elastic components into a single integrated elastic intermediate layer element with variable elasticity distribution. This merging eliminates the need for separate elastic components and highly elastic intermediate plates, reducing the number of parts while maintaining the required vibration properties through the optimized elasticity gradient within the single component.
Solution Approach 2:
The elastic intermediate layer element features a variable elasticity distribution with a more elastic inner area surrounded by a less elastic outer area. This local quality variation allows different regions of the same component to perform different functions: the inner area provides high elasticity for vibration isolation, while the outer area provides structural stability and force distribution, eliminating the need for multiple components with uniform properties.
2Reliability
If multiple elastic and highly elastic components are used in the rail fastening system, then the required elasticity under high loads and speeds is achieved, but the material usage and costs increase
Solution Approach 1:
The single elastic intermediate layer element incorporates a variable elasticity distribution where the inner area has higher elasticity for withstanding dynamic loads and vibrations, while the outer area has lower elasticity for structural support. This localized property optimization ensures adequate elasticity under high loads and speeds while minimizing total material usage compared to using multiple high-elasticity components throughout the entire structure.
Solution Approach 2:
The elastic intermediate layer element functions as a composite structure with regions of different elasticity values, effectively combining the properties of multiple elastic and highly elastic materials into a single integrated component. This composite approach achieves the required elasticity under high loads and speeds while reducing the total quantity of elastic materials needed compared to traditional multi-component systems.
3Device complexity
If a single elastic intermediate layer element with variable elasticity distribution is used, then the structure is simplified and assembly is easier, but additional highly elastic components are eliminated
Solution Approach 1:
The single elastic intermediate layer element achieves high elasticity performance through its variable elasticity distribution, with a more elastic inner area that specifically addresses vibration isolation requirements. This localized high-elasticity region ensures that the simplified single-component structure maintains the necessary reliability for elasticity performance under high loads and speeds, matching the functionality of traditional multi-component systems.
Solution Approach 2:
The invention changes the elasticity parameter within the single intermediate layer element by creating a gradient distribution (more elastic inner area vs. less elastic outer area). This parameter variation within the component allows the simplified structure to achieve the same elasticity performance as complex multi-component systems, proving that structural simplicity does not compromise reliability when material properties are optimized.
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 significantly reduces manufacturing and assembly complexity, material usage, and costs while maintaining necessary elasticity and stability, allowing for efficient integration into existing systems and use on various track types, including slab tracks with polyvalent sleeper elements.
Implementation Method 1
an intermediate structure is arranged between a rail element and the slab track, by means of which the rail element is elastically operatively connected to the slab track
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 2A~2B
AI summary
The invention relates to a rail fastening system (S) for fixing a rail element (3) to a ballastless track (5), an intermediate construction (2) being arranged between the rail element (3) and the ballastless track (5), and the rail element (3) being operatively connected to the solid track (5) in an elastic manner. The intermediate construction (2) has only a single elastic intermediate layer element (1; 101) which has a variable modulus of distribution over its cross-section (6) in the direction (7A) of its longitudinal extent, (8) and/or in the direction (7B) transversely to its longitudinal extent (8).