Hermaphroditic Electrical Connector for Freight Rail
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Solution Overview
Problem
The existing electrical connectors for freight railroad cars face issues with inconsistent disconnection forces, difficult latching mechanism activation, water ingress, and moisture absorption, leading to reduced performance and reliability in adverse weather conditions.
Innovation Solution
The proposed electrical connector features a 'hermaphroditic' design with a latch strike plate, O-rings, potting compounds, and enhanced engagement seals, made from liquid crystal polymer to maintain consistent disconnection forces, easy latching mechanism activation, and prevent water ingress, while minimizing moisture absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hermaphroditic electrical connector is used for coupling adjacent freight railroad cars, then electrical connections can be established between cars, but the disconnection force becomes inconsistent over the connector's life due to wear on the connection wall
Solution Approach 1:
The connector is divided into separate functional components: a body portion with electrical contacts and a coupling portion with engagement features. This segmentation allows the coupling mechanism to be optimized independently from the electrical connection mechanism, so wear in the coupling area does not affect electrical contact integrity or disconnection force consistency.
Solution Approach 2:
The connector design incorporates pre-engineered wear compensation features and self-lubricating materials in the coupling surfaces. These preliminary actions ensure that even as wear occurs during operation, the disconnection force remains within acceptable ranges throughout the connector's service life.
2Strength
If the latching mechanism is designed with a two-section actuation arm, then the connector can be securely latched, but the activation becomes difficult for normal human beings
Solution Approach 1:
The actuation arm incorporates curved geometries and ergonomic contours that leverage human finger mechanics. The curved actuation surface distributes force more effectively, reducing the peak force required while maintaining secure latching engagement.
Solution Approach 2:
The latching mechanism uses spring-loaded elements and movable components that adapt to the operator's input force. The dynamic design allows the latch to engage securely with full force while requiring only moderate activation force, as the mechanism uses stored elastic energy to assist in the latching action.
3Adaptability or versatility
If the electrical connector is used in adverse weather conditions, then the connector must tolerate rain and freezing temperatures, but water ingress and moisture absorption occur leading to reduced performance
Solution Approach 1:
The connector body is constructed from composite materials including corrosion-resistant alloys and low-moisture-absorption polymers. These composite materials provide both mechanical strength and resistance to water ingress and moisture absorption, maintaining electrical performance in adverse weather conditions.
Solution Approach 2:
The connector incorporates flexible sealing elements and gaskets that conform to mating surfaces and prevent water ingress. These flexible seals maintain their elasticity across a wide temperature range, ensuring protection against moisture and water in both freezing and warm conditions.
4Ease of manufacture
If the body is made from traditional materials, then the connector can be manufactured, but the material absorbs moisture causing dimensional changes
Solution Approach 1:
The material selection focuses on substances with inherently low moisture absorption parameters and minimal coefficients of thermal expansion. By changing the material parameters to use hygroscopic-resistant composites and stabilized polymers, the connector maintains dimensional stability while remaining manufacturable using standard fabrication processes.
Data Source
AI summary
An improved electrical connector including a latch strike plate, a body having a base, a receiver extending from the base and configured to receive the latch strike plate, an inserter extending from the base, a first electrical connection assembly extending through the body, a second electrical connection assembly extending through the body, an electrical linkage cable assembly connected to the base, the first electrical connection assembly, and the second electrical connection assembly, a latching mechanism partially positioned in the base and the inserter and partially extending from the base and the inserter, and a securing assembly extending in and from the base.