Rail Coupler Yoke Assembly With Conical Spring Wear Control
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Solution Overview
Problem
Existing rail vehicle coupler systems experience misalignment and excessive wear due to articulation and wear of components like yoke bodies, guide rods, wear rings, and spring retainers, leading to impaired coupling and increased maintenance needs.
Innovation Solution
A yoke assembly featuring a conical spring and guide rod configuration that minimizes contact between the spring assembly and the housing, using a conical spring with varying diameters to maintain alignment and reduce wear, along with a spring retainer and guide rod design that prevents direct contact with the housing, thereby stabilizing the assembly and reducing wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional cylindrical springs and wear rings are used in the yoke assembly, then the assembly can accommodate articulation and component wear, but misalignment occurs and excessive wear develops over time
Solution Approach 1:
The patent changes the spring geometry from a traditional cylindrical shape to a conical shape with varying wire diameter along its length. This parameter change allows the spring to accommodate axial movement while maintaining lateral alignment, preventing the misalignment that causes wear in traditional designs. The conical configuration with larger diameter at the rear and smaller diameter at the front creates a self-aligning mechanism that compensates for articulation without requiring wear rings.
2Adaptability or versatility
If wear rings and spring retainers are added to accommodate articulation, then the yoke can handle movement, but the device complexity increases and maintenance frequency increases
Solution Approach 1:
The patent extracts and eliminates the wear rings and spring retainers from the yoke assembly by designing a conical spring that inherently accommodates articulation through its geometry. The conical spring's varying diameter allows it to absorb axial movement while maintaining lateral stability, removing the need for separate wear accommodation components and simplifying the overall device structure.
Solution Approach 2:
The conical spring performs multiple functions simultaneously: it provides the necessary biasing force, accommodates articulation through its varying diameter geometry, and maintains alignment without requiring separate wear rings or retainers. This multi-functionality reduces the number of parts and simplifies the assembly while maintaining adaptability to movement.
3Stability of the object's composition
If conventional springs contact the housing extensively, then the spring is supported, but wear increases at the contact points
Solution Approach 1:
The conical spring's varying diameter creates a stable configuration where the spring is supported at its base by the housing but the angled sides prevent extensive contact along the housing walls. The geometry naturally limits contact to minimal points while maintaining stability, reducing wear compared to conventional cylindrical springs that may contact the housing over larger surface areas during articulation.
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 solution maintains alignment and reduces wear, enhancing the reliability and longevity of the coupler system by minimizing contact with the housing, facilitating easier maintenance and repair of components.
Implementation Method 1
a conical spring disposed within the housing and positioned in proximity to the rear end
Data Source
AI summary
A yoke assembly including a housing defining a front end and an opposite rear end, the housing defining an inner chamber between the front end and the rear end, a longitudinal axis extending between the front end and the rear end. In addition, the yoke assembly includes a conical spring disposed within the housing and positioned in proximity to the rear end, the conical spring extending a distance from the rear end in the direction of the front end. The yoke assembly further includes a guide rod extending through the conical spring and the inner chamber of the housing and aligned axially with the longitudinal axis. The guide rod is positioned to be engaged by a mechanical head of a first coupler system of a first rail vehicle.