Rail Vehicle Elastic Wheel With Segmented Metal Damping
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Solution Overview
Problem
Existing rubber-sprung wheels for rail vehicles face issues with high manufacturing costs, alignment challenges, and rapid wear due to complex geometry and elastomer material wear, leading to reduced damping quality and increased maintenance costs.
Innovation Solution
The use of damping means configured as separate circular ring segments with metal sheet enclosures and centering cams, which are smaller and more easily aligned, reducing manufacturing complexity and wear, and allowing for adaptable use across different wheel diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rubber blocks or rubber rings are used as damping means with complex geometry and elastomer material, then damping quality is improved, but manufacturing costs increase and wear occurs rapidly
Solution Approach 1:
The patent changes the material parameter from elastomer to metal (steel or cast iron) for the damping means. This substitution maintains the damping function through controlled elasticity and deformation of the metal segments while eliminating the wear and manufacturing cost issues associated with elastomer materials. The metal segments are designed with specific geometric parameters (curved shape, thickness) to achieve the required damping performance.
Solution Approach 2:
The patent employs simple metal segments that can be easily manufactured and replaced if needed. These segments are designed as straightforward mechanical components rather than complex elastomer structures, making them more economical to produce and suitable for applications where replacement is more feasible than maintaining complex elastic components.
2Reliability
If rubber blocks or rubber rings with complex geometry are used, then damping quality is improved, but alignment challenges arise during assembly
Solution Approach 1:
The patent divides the damping means into multiple identical metal segments arranged circumferentially around the wheel tire. Each segment is a simple, standardized component with the same geometry, making alignment straightforward. The segments are positioned at regular intervals and can be independently aligned, eliminating the complex alignment requirements of single-piece elastomer dampers.
Solution Approach 2:
The patent creates a composite structure combining metal segments with the wheel tire and flange components. The metal segments serve as discrete damping elements within the larger wheel assembly, allowing for modular installation and alignment. This composite approach separates the damping function from the structural components, simplifying the alignment process during assembly.
3Reliability
If elastomer material is used for damping means, then damping performance is improved, but wear occurs rapidly leading to reduced lifespan
Solution Approach 1:
The patent fundamentally changes the material parameter from elastomer to metal (steel or cast iron) for the damping means. This substitution maintains the damping function through controlled elasticity and deformation of the metal segments while eliminating the wear and manufacturing cost issues associated with elastomer materials. The metal segments are designed with specific geometric parameters (curved shape, thickness) to achieve the required damping performance.
Solution Approach 2:
The patent employs simple metal segments that can be easily manufactured and replaced if needed. These segments are designed as straightforward mechanical components rather than complex elastomer structures, making them more economical to produce and suitable for applications where replacement is more feasible than maintaining complex elastic components.
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
This configuration enhances load-bearing capacity, extends lifespan, improves damping and spring performance, and reduces manufacturing and maintenance costs by simplifying assembly and alignment, while minimizing wear and slip-through risks.
Implementation Method 1
damping means configured as separate circular ring segments with metal sheet enclosures and centering cams
Implementation Method 2
The general goal of using rubber-sprung wheels is to reduce impact shocks, vibrations, and shaking on the chassis and the coach box
Implementation Method 3
a clamp ring attached to the wheel body on a side face opposite the ring flange via a fastening means in a friction-locking and/or positively locking manner
Data Source
AI summary
A wheel for a rail vehicle has a wheel tire (1) with a ridge (9) formed on the inner circumference of the wheel tire (1), a wheel body (3) with a ring flange (11) formed on the outer circumference and running radially outward, and a clamp ring (5) attached to the wheel body (3) via a fastening means (13), on a side face opposite the ring flange (11). Damping means formed as at least two separate circular ring segments (7) extend between the clamp ring (5) and the circumferential ridge and between the circumferential ridge (9) of the wheel tire (1) and the ring flange in the circumferential direction of the wheel. On at least one side, the circular ring segments (7) have at least two centering cams (19) meshing into corresponding recesses (21). The circular segments (7) have an elastomer core enclosed by metal sheet segments (17).