Rail Vehicle Bogie Central Rocker Support for Wear Distribution
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Solution Overview
Problem
Existing rail vehicle running gears with wide rocker support cause uneven wear on rail profiles due to precise wheel guidance, leading to increased wear at specific points, which can be mitigated by introducing a sinusoidal running motion to distribute wear evenly.
Innovation Solution
A rail vehicle design with a rocker supported centrally on the car body, utilizing a horizontally arranged pull and push rod and an upright torque arm to absorb and introduce forces, allowing for sinusoidal wheel movement, and incorporating a wheel set transmission with a horizontally aligned torque arm to distribute longitudinal forces, ensuring compact dimensions and collision-free guidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the rocker arm is supported at both ends on the car body (wide bearing), then precise wheel guidance is achieved, but concentrated wear occurs on narrow sections of the rail profile
Solution Approach 1:
The patent inverts the conventional wide-bearing configuration by supporting the rocker arm centrally rather than at both ends. This inversion allows the wheels to execute sinusoidal movements across the rail width, transforming the guidance mechanism from a fixed wide-base support to a central pivot that enables lateral oscillation, thereby distributing wear evenly across the rail profile while maintaining guidance precision.
Solution Approach 2:
The central support configuration transforms the static wide-bearing guidance system into a dynamic one where the rocker arm can oscillate laterally. This dynamic behavior enables the wheels to follow a sinusoidal path, continuously changing their contact point on the rail and preventing concentrated wear at any single location while maintaining accurate guidance through the central pivot point.
2Object-affected harmful factors
If the rocker arm is supported centrally on the car body, then sinusoidal wheel movement is enabled for even wear distribution, but structural stability may be compromised
Solution Approach 1:
The patent segments the force transmission functions by introducing separate torque arms for different force components: a first torque arm (horizontally arranged) handles longitudinal forces, while a second torque arm (upright arranged) handles vertical forces. This segmentation allows the central rocker support to enable sinusoidal movement for wear distribution while the distributed torque arm structure maintains chassis stability through dedicated force transmission paths.
Solution Approach 2:
The torque arms act as intermediary elements between the centrally supported rocker arm and the car body. These intermediaries transmit and distribute the forces generated by the sinusoidal motion and vehicle operation to the car body structure, ensuring that the central support configuration does not compromise overall stability while maintaining the wear-distributing oscillatory movement.
3Volume of moving object
If torque arms and transmission components are arranged to avoid collisions, then compact dimensions are achieved, but structural complexity increases
Solution Approach 1:
The patent resolves spatial conflicts between torque arms and transmission components by utilizing different spatial dimensions and orientations. The first torque arm is arranged horizontally while the second is arranged upright, and they intersect at right angles. This dimensional arrangement allows all components to coexist in a compact configuration without collisions, achieving space efficiency while the systematic organization of multi-dimensional components keeps the overall structural complexity manageable.
Data Source
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AI summary
In the case of a chassis (1) of a rail vehicle comprising a car body (2), with two wheels rotatable about a common axis (5), and a rocker arm (6) guiding the axis, wherein the rocker arm is pivotally mounted about a pivot axis running parallel to the axis, such that it guides the axis vertically, and wherein the rocker arm is supported on the car body, the invention proposes that the rocker arm is supported centrally on the car body.