Cargo Lashing Socket Assembly with Removable Base
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Solution Overview
Problem
Existing cargo lashing fittings for maritime transportation, particularly those on aluminum alloy decks, face challenges with galling and wear, requiring time-consuming and costly replacement procedures, and often necessitate tool usage and flame cutting of the entire socket.
Innovation Solution
A socket assembly comprising a housing made of aluminum alloy, permanently installed on the deck, with a removable and replaceable base and locking ring system that allows for easy installation and removal without tools or flame cutting, using a telescopically coupled locking ring to secure the base against rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the socket is made as an integrated unit for strength and stability, then the structural integrity is improved, but the replacement time and complexity increase significantly when the lashing fixture is damaged
Solution Approach 1:
The socket assembly is divided into separate components: a permanent housing embedded in the deck and a removable base containing the lashing fixture. This segmentation allows the base to be replaced independently without removing the entire socket assembly, reducing replacement time while maintaining the structural integrity of the permanent housing.
Solution Approach 2:
The lashing fixture base is extracted as a separate removable component from the permanent housing. This extraction enables the base to be removed and replaced without affecting the housing that remains embedded in the deck, thus reducing replacement time and complexity while preserving the structural integrity of the installed system.
2Reliability
If multiple fasteners are used to secure the base in the housing for reliability, then the connection strength is improved, but the device complexity and tool requirements increase
Solution Approach 1:
Multiple fastening functions are merged into a single integrated locking ring mechanism. The locking ring simultaneously engages with multiple features of the base and housing, providing reliable connection strength while eliminating the need for multiple separate fasteners and reducing device complexity.
Solution Approach 2:
The locking ring is designed to be manually operable without requiring external tools. The mechanism itself provides the means for its own installation and removal through manual manipulation, eliminating the need for additional fastener removal/installation tools while maintaining secure connection.
3Reliability
If the entire socket is cut out for base replacement on aluminum decks, then the galling and wear problems are resolved, but the installation time and cost increase significantly
Solution Approach 1:
The socket assembly is segmented into a permanent housing and a removable base, allowing the base to be replaced independently without cutting out the entire socket from the aluminum deck. This resolves the galling issue by enabling base replacement while maintaining ease of installation through simple removal and reinstallation of the base component.
4Weight of moving object
If aluminum alloy is used for the socket to match the deck material, then the compatibility and weight are improved, but the susceptibility to galling from lashing gear hooks increases
Solution Approach 1:
The socket is segmented into a permanent aluminum housing and a removable base that can be made from different materials or treatments. This allows the aluminum housing to maintain weight advantages and deck compatibility, while the removable base can be optimized for resistance to galling through alternative materials or surface treatments.
Data Source
AI summary
A socket assembly including a housing, a base and a locking ring. The housing includes a recessed interior capable of receiving and securing the base. The locking ring cooperates with the housing and the base to secure the base against rotation. The base preferably includes a lashing fixture (e.g., cloverleaf, crossbar, or other) for engaging with a lashing hook.