Tangent Base Channel Structure for Asymmetric Crossarm Loads
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Solution Overview
Problem
Traditional crossarms in power transmission systems face challenges in withstanding asymmetric loads and environmental forces, such as wind, ice, and accidental impacts, leading to stress and reduced load capacity.
Innovation Solution
A tangent base with projections forming a channel for securing the crossarm, featuring planar reaction surfaces and tabs to counteract asymmetric loads, made of aluminum alloy, which increases load capacity and reduces material and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional crossarm mounting methods are used, then installation is simple, but asymmetric load capacity is insufficient
Solution Approach 1:
The mounting base is segmented into multiple projections extending from the front face, with each projection containing a channel for receiving the crossarm. This segmentation allows the structure to handle asymmetric loads by distributing forces across multiple discrete mounting points rather than a single continuous support.
Solution Approach 2:
The mounting base employs an asymmetric design with projections extending in specific directions to counteract asymmetric loads. The projections are positioned and dimensioned to provide enhanced support on the side experiencing greater load, creating an inherently asymmetric load-bearing structure that matches the asymmetric nature of the forces applied.
2Strength
If more material is used to increase load capacity, then strength improves, but weight and material usage increase
Solution Approach 1:
The mounting base applies local quality by concentrating material only where structurally necessary. The projections extend forward from the front face with channels positioned to receive the crossarm at critical load-bearing locations. This localized material placement provides high load capacity at specific points while minimizing overall material usage and weight.
Solution Approach 2:
The mounting base is constructed from aluminum alloy, a composite material that provides high strength-to-weight ratio. This material choice enables the structure to achieve superior load-bearing capacity while maintaining low weight, resolving the contradiction between strength and weight.
3Stability of the object's composition
If traditional mounting structures are used, then manufacturing is simple, but stability under environmental forces is reduced
Solution Approach 1:
The mounting base incorporates pre-formed projections and channels that are integral to the base structure itself, rather than requiring separate attachment components. The projections extend forward from the front face with channels sized to receive the crossarm, creating preliminary structural features that enhance stability under environmental forces while simplifying the overall manufacturing process.
Data Source
AI summary
A utility hardware attachment assembly for utility poles is provided. The utility hardware attachment assembly includes a crossarm and a tangent base. A base body of the tangent base has a rear-mounting surface for mounting to the utility pole and a front face opposite the rear-mounting surface. A plurality of tabs extends forward from the front face and form a channel sized for receiving the crossarm. An inner surface of each of the tabs is a generally planar reaction surface. The crossarm is secured to the base body within the channel and the crossarm abuts at least two of the tabs when experiencing an asymmetric load.