Rail Cushion Pin-Field Structure for Variable Track Load Damping
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Solution Overview
Problem
Existing track rail fastening systems fail to provide variable cushioning dependent on the weight of rail equipment, leading to inefficient load transmission and vibration mitigation.
Innovation Solution
A rail cushion with deformable pins that form multiple cushioning planes, allowing for varying degrees of deformation based on load, using a one-piece cushion body with full-length pads and a pin field of deformable pins to adapt to different load levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a deformable cushion is used to absorb and rebound loads, then vibration mitigation and noise reduction are improved, but the ability to adapt to varying load weights is insufficient
Solution Approach 1:
The cushion is segmented into multiple cushioning planes with different stiffness characteristics. Each plane consists of deformable elements (such as rubber blocks, springs, or air chambers) arranged at different heights and stiffness levels. When loaded, these planes engage sequentially or in combination, allowing the cushion to adapt its overall stiffness to match the applied load weight while continuously providing vibration absorption and noise reduction.
Solution Approach 2:
The cushion employs dynamically adjustable stiffness through deformable elements that change their mechanical properties under load. The deformable elements can include progressive spring rates, air pressure adjustment mechanisms, or elastomeric materials with non-linear stress-strain characteristics. This dynamic behavior enables the cushion to optimize its vibration mitigation and noise reduction performance for varying load conditions.
2Adaptability or versatility
If a single-plane cushion structure is used, then the device complexity is reduced, but the dynamic stiffness and load adaptation capability are insufficient
Solution Approach 1:
Multiple cushioning planes with different stiffness characteristics are merged into a single integrated cushion structure. The deformable elements are arranged in a compact configuration where they work together as a unified system. This merging approach provides dynamic stiffness adaptation without requiring separate cushion components or complex adjustment mechanisms, thus achieving load adaptation with minimal increase in overall device complexity.
Solution Approach 2:
Different regions of the cushion have locally optimized stiffness characteristics. The deformable elements are distributed non-uniformly, with varying density, size, or material properties across different zones of the cushion. This local quality variation allows the cushion to provide appropriate stiffness in different areas and under different load conditions, achieving dynamic adaptation without requiring a completely complex overall structure.
3Adaptability or versatility
If deformable pins are added to create multiple cushioning planes, then load adaptation and dynamic stiffness are improved, but the manufacturing complexity increases
Solution Approach 1:
The deformable pins and multiple cushioning planes are pre-configured and pre-positioned during cushion manufacturing. The pins are inserted into predetermined locations and orientations, and the cushioning planes are assembled in their final configurations before the cushion is installed. This preliminary action eliminates the need for complex field adjustments or assembly procedures, making the manufacturing process more systematic and repeatable despite the increased structural complexity.
Solution Approach 2:
The cushion design utilizes parameter variations in the deformable pins (such as diameter, length, material composition, or spacing) to achieve different cushioning characteristics. By changing these physical parameters rather than adding entirely different components, the manufacturing process can be simplified. Standardized pin designs with varying parameters can be produced using the same manufacturing tools and processes, reducing the impact of complexity on ease of manufacture.
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 system provides dynamic stiffness, effectively absorbing and rebounding loads, reducing noise and extending the service life of rail machinery by adapting to varying weights and loads.
Implementation Method 1
a rail cushion having dynamic stiffness and using deformable pins deflectable under load to provide multiple different rail cushioning planes
Implementation Method 2
deformable pins deflectable under load
Implementation Method 3
Concerns relating to transmission of loads and vibrations between rail equipment and substrates
Implementation Method 4
absorb or otherwise mitigate loads and vibrations for the purpose of reducing noise and extending service life
Data Source
AI summary
A track rail fastening system includes a rail cushion positionable laterally between a first fastener assembly and a second fastener assembly. The rail cushion includes a first full-length pad and a second full-length pad, and a pin field formed by a plurality of deformable pins. The first full-length pad and the second full-length pad define a first rail cushioning plane. The deformable pins in the pin field define a second rail cushioning plane. The cushion is deformable between a rest configuration where the cushioning planes are spaced, and a loaded configuration where the cushioning planes are co-planar. Primary, lower load deformable pins are configured to deflect such that under sufficient load both the primary, lower load deformable pins, and secondary, higher load pins engage an underlying substrate.