Eccentric Bush Traction Rod Assembly for Bogie Stability
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Solution Overview
Problem
The coupling of frame ends of radial arms in bogie systems limits the overall height of the frame, reducing stability as the bogie moves along a route.
Innovation Solution
A traction rod assembly with a body extending between a first end coupled to the frame and a second end coupled to the axle assembly, featuring a bush assembly with an eccentric offset and a bearing assembly with cylindrical bearings, allowing rotation relative to the axle assembly, thereby reducing vertical, longitudinal, and lateral movements of the axle box.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the frame end of radial arms is coupled with the bottom side of the frame, then the radial arms can be fixed to provide structural support, but the overall height of the frame is limited and stability decreases as the bogie moves
Solution Approach 1:
The patent transitions from a conventional radial arm configuration coupled to the bottom side of the frame to a new configuration where the radial arm is coupled to the side of the frame. This dimensional change in coupling location allows the frame to achieve greater overall height while maintaining structural support, thereby improving bogie stability during movement.
2Stability of the object's composition
If the frame height is increased to improve stability, then the bogie stability improves, but the radial arms cannot be properly fixed to provide structural support
Solution Approach 1:
The invention resolves this contradiction by changing the coupling dimension from the bottom side of the frame to the side of the frame. This allows the frame height to be increased for improved stability while the radial arms remain properly fixed to provide necessary structural support through their coupling with the frame at the side location.
3Device complexity
If conventional radial arm coupling is used, then the structure is simple, but the axle box movement relative to the frame is excessive
Solution Approach 1:
The patent introduces a traction rod as an intermediary component between the frame and the axle box. This traction rod, when coupled with the bearing assembly, acts as a mediator that reduces excessive movement of the axle box relative to the frame, thereby improving position stability without significantly increasing overall structural complexity.
Solution Approach 2:
The invention replaces the conventional direct mechanical coupling of radial arms with a new system incorporating a traction rod and bearing assembly. This substituted mechanical system effectively reduces axle box movement while maintaining reasonable structural complexity through the use of standardized bearing 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
The traction rod assembly enhances the rigidity and stability of the bogie system by minimizing the amount of movement of the axle box relative to the frame, improving the overall stability and cargo capacity.
Implementation Method 1
a bearing assembly coupled with the second end of the body. The bearing assembly includes cylindrical bearings and one or more spacers disposed between the cylindrical bearings along a bearing axis
Data Source
AI summary
A traction rod assembly for a bogie system includes a body extending between first and second ends. A bush assembly is coupled with the first end and includes a first component having a passage, and a second component disposed within the passage of the first component. The bush assembly includes an eccentric offset such that a center of the first component is offset from a center of the second component. A bearing assembly is coupled with the second end of the body and includes cylindrical bearings and spacers that are concentric with a passage disposed at the second end of the body. The bush assembly is coupled with a frame of the bogie system and the bearing assembly is operably with an axle assembly of the bogie system. The bearing assembly allows rotation of the body relative to the axle assembly of the bogie system.