Bridge Plate Locking Assembly Asymmetry for Wider Vehicle Loading
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Solution Overview
Problem
Standard bridge plates in auto-rack railroad cars are insufficient to accommodate vehicles with wider wheel bases, leading to inefficient loading and unloading processes as they cannot span the gap between adjacent railcars, requiring separate ramps and increased manpower and time.
Innovation Solution
The introduction of a locking assembly with a guide tube and pivot pin system that shifts the bridge plates outward from the center, allowing for increased distance between the outer edges of parallelly placed bridge plates, enabling the accommodation of wider vehicles by using left-aligned, right-aligned, or center-aligned configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If standard bridge plates are used with center-aligned locking assemblies, then the assembly process is simple, but the distance between outer edges of parallel bridge plates is insufficient for vehicles with wider wheel bases
Solution Approach 1:
The locking assembly is designed with asymmetric configurations including left-aligned, right-aligned, and center-aligned options. The guide tube and pivot pin are positioned at different locations relative to the bridge plate center, creating asymmetric structures that increase the distance between outer edges of parallel bridge plates while maintaining structural integrity and meeting AAR specifications.
2Adaptability or versatility
If bridge plates are positioned to accommodate wider vehicles, then vehicle loading capability is improved, but the structural strength and stability may be compromised
Solution Approach 1:
The locking assembly components are strategically positioned at specific locations on the bridge plate (left-aligned, right-aligned, or center-aligned) to optimize both the distance between parallel bridge plates and the structural strength. The guide tube and pivot pin placements are designed to meet AAR specifications for maximum weight, minimum strength, and fatigue load while enabling accommodation of vehicles with wider wheel bases.
3Adaptability or versatility
If multiple ramp systems are used for different vehicle widths, then all vehicle types can be accommodated, but the device complexity and loading time increase
Solution Approach 1:
The bridge plate system employs universal locking assemblies with multiple alignment configurations (left-aligned, right-aligned, center-aligned) that can accommodate vehicles of various widths using the same bridge plate design. This multi-functional approach eliminates the need for separate ramp systems for different vehicle types, thereby maintaining high loading and unloading efficiency while achieving broad vehicle compatibility.
Data Source
AI summary
Methods and systems are provided for locking assemblies of a pair of bridge plates placed between adjacent railcars. In one example, a bridge plate assembly may include a locking assembly with a guide tube shifted to a side from a center of a bridge plate and a pivot pin coupled to the guide tube protruding out of a left side or a right side of the bridge plate.