Plastic Brake Linkage Bearing for Rail Bogie Vibration Isolation
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Solution Overview
Problem
Running gears of rail vehicles face high mechanical stress, electrical voltage, and vibrations, leading to rapid aging of connections and frequent maintenance needs due to the transmission of shocks and vibrations between the bogie and brake linkage, with existing rubber-metal mountings not providing adequate insulation or longevity.
Innovation Solution
A plastic bearing element, preferably non-vulcanized and hard plastic, is used to mount the brake linkage on the bogie, providing electrical insulation and reducing shock and vibration transfer, potentially replacing traditional rubber-metal mountings, and offering a longer service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rubber-metal mountings are used to mount the brake linkage on the bogie, then electrical insulation is provided, but the service life is short and maintenance frequency is high due to rapid aging from vibrations and mechanical stress
Solution Approach 1:
The patent changes the material parameter from rubber-metal composite to plastic (polymer) material. This parameter change fundamentally alters the material's response to vibrations and mechanical stress, eliminating the rapid aging problem while maintaining electrical insulation properties and reducing maintenance frequency.
Solution Approach 2:
The patent employs plastic as a composite material that combines multiple desirable properties: electrical insulation, vibration damping, and high resistance to mechanical stress. This single composite material replaces the multi-component rubber-metal mounting, achieving longer service life and reduced maintenance while maintaining the necessary insulation properties.
2Object-affected harmful factors
If traditional rubber-metal mountings are used, then the brake linkage is mounted on the bogie, but shocks and vibrations are transmitted between the bogie and brake linkage causing rapid aging
Solution Approach 1:
The patent converts the harmful effect of vibrations and shocks into a beneficial damping effect. The plastic material's inherent viscoelastic properties transform the transmitted mechanical energy into heat through internal friction, thereby reducing vibration transmission while extending service life and eliminating the rapid aging problem.
3Reliability
If plastic bearing elements are used to replace rubber-metal mountings, then electrical insulation is maintained with dielectric strengths up to 100 kV, but the material must withstand high mechanical forces of 100 kN and more
Solution Approach 1:
The patent employs specially formulated plastic materials that exhibit composite-like properties, combining high dielectric strength (up to 100 kV) with exceptional mechanical strength (withstanding forces of 100 kN and more). These engineered plastics integrate electrical insulation and mechanical load-bearing capabilities into a single material system.
Solution Approach 2:
The patent changes the material parameters of the plastic to achieve the required performance. By adjusting molecular structure, cross-linking density, and material composition, the plastic is engineered to simultaneously provide high electrical insulation (dielectric strength up to 100 kV) and withstand extreme mechanical forces (100 kN and more).
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 plastic bearing element significantly extends the service life of the running gear, reduces maintenance needs, and maintains effective electrical insulation with dielectric strengths up to 100 kV, while damping vibrations and transferring braking forces efficiently.
Implementation Method 1
the bogie and the brake linkage are electrically insulated from each other... maintains effective electrical insulation with dielectric strengths up to 100 kV
Implementation Method 2
The transmission of shocks and vibrations between the brake linkage and the bogie is reduced... damping vibrations and transferring braking forces efficiently
Implementation Method 3
forces of 100 kN and more may act on the connecting elements or bearing elements between the bogie and the brake linkage... transferring braking forces efficiently
Data Source
AI summary
The aim of the invention is to provide a running gear with a mount for a brake linkage on a bogie, wherein the mount has a long service life and requires little maintenance. The transmission of shocks and vibrations between the brake linkage and the bogie is reduced, and the bogie and the brake linkage are electrically insulated from each other. A running gear for a rail vehicle including a bogie and a brake linkage is proposed, having at least one bearing element. The brake linkage is mounted on the bogie and/or is connected to the bogie by means of the at least one bearing element, and the at least one bearing element has a plastic and/or consists of a plastic.