Auto-Rack Bridge Plate Locking Assembly Repair
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Solution Overview
Problem
The existing bridge plate locking assemblies for auto-rack railroad cars are prone to damage during use, installation, and removal, leading to functional issues and the need for complete replacement due to bent or cracked components, with no efficient repair options available.
Innovation Solution
A bridge plate locking assembly with a removable locking pin, a support block to prevent guide tube bending, and a securely fixed pivot pin, allowing for easy replacement of damaged parts and efficient repair without replacing the entire assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional locking assembly with welded components is used, then the assembly provides structural integrity, but the entire assembly must be replaced when any component becomes damaged
Solution Approach 1:
The locking assembly is divided into separate replaceable components including a guide tube, locking pin, collar, and spring. Each component can be independently inspected and replaced without affecting the other parts, transforming the previously monolithic welded structure into a modular assembly where damage to one element does not necessitate replacement of the entire unit.
Solution Approach 2:
The design enables selective discarding and replacement of only the damaged component (such as the locking pin or collar) while retaining and reusing the undamaged portions of the assembly. This approach recovers the value of intact components and eliminates the waste associated with replacing the entire locking assembly due to a single failed part.
2Ease of operation
If a locking assembly with a loosely attached pivot pin is used, then the assembly allows for pivot movement, but the pivot pin can become loose and cause functional failure
Solution Approach 1:
The pivot pin is pre-positioned and secured within the guide tube using a collar that can be adjusted to the appropriate location. This preliminary securing action prevents the pivot pin from becoming loose during operation, eliminating the need for repeated adjustments or replacements while maintaining the necessary pivot movement functionality.
Solution Approach 2:
The collar acts as an intermediary component between the pivot pin and the guide tube, providing a secure connection that maintains pivot movement while preventing excessive looseness. The collar mediates the relationship between the moving pivot pin and the fixed guide tube, ensuring reliable functional stability.
3Strength
If a locking assembly with a collar and spring is used, then the assembly provides locking tension, but the collar can crack and move relative to the locking pin
Solution Approach 1:
The collar and spring are designed as inexpensive, easily replaceable components that can be quickly swapped out if they become cracked or worn. This approach treats these tension-providing elements as consumable parts whose replacement is simpler and less costly than replacing the entire locking assembly, maintaining reliability through easy component turnover rather than long-term durability of individual parts.
4Strength
If a locking assembly with multiple welded components is used, then the assembly provides structural strength, but repair requires complete replacement of the assembly
Solution Approach 1:
The locking assembly is segmented into distinct non-welded components (guide tube, locking pin, collar, spring) that can be independently manufactured and assembled. This segmentation maintains structural strength through proper component design and assembly while enabling selective repair of individual parts, thereby reducing overall device complexity in terms of maintenance and repair operations.
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 enhances the reliability and maintainability of the locking assembly by enabling the replacement of damaged components, reducing the likelihood of functional failures and allowing for efficient repair, thus extending the lifespan of the bridge plate locking assembly.
Implementation Method 1
a spring positioned in the guide tube between the collar and the pivot pin
Data Source
AI summary
The present disclosure provides an auto-rack bridge plate locking assembly including a support bracket, a support block, a guide tube, a slidable locking pin partially positioned in the guide tube, a handle removably attachable to the locking pin by a removable roll pin, a fixed pivot pin partially positioned in the guide tube, and a spring positioned in the guide tube between the pivot pin and the locking pin. The present disclosure also provides an auto-rack railroad car bridge plate including a plate configured to extend from one auto-rack railroad car to an adjacent auto-rack railroad car, and such locking assembly connected to the plate and configured to pivotally attach the plate to one of the auto-rack rail road cars.