Reinforced Boom Sidewall Structure for Lightweight Bending Strength
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Solution Overview
Problem
Existing booms for aerial work equipment face challenges in efficiently installing reinforcing materials while maintaining productivity, economy, and durability, particularly due to complex processes and sensitivity to external environments.
Innovation Solution
The boom incorporates sidewalls with insertion parts and grooves for easy installation of reinforcing materials like carbon fiber, using adhesive and riveting methods to secure them, ensuring strength and rigidity without increasing weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If reinforcing layers are fixed to steel plates through resin, adhesive, or mechanical fastener, then strength against bending load is improved, but manufacturing complexity and cost increase due to time-consuming processes
Solution Approach 1:
The patent extracts the reinforcing function from separate attachable layers and integrates it directly into the sidewall structure through insertion parts. The reinforcing material is embedded within grooves or cavities of the sidewall itself, eliminating the need for separate fixing processes with resin, adhesive, or mechanical fasteners.
Solution Approach 2:
The patent merges the sidewall structure with the reinforcing material by providing insertion parts (grooves, cavities) that are formed as integral parts of the sidewall. This combining approach allows the reinforcing function to be built-in during sidewall manufacturing rather than added through complex post-processing.
2Strength
If reinforcing layers are exposed to outer surfaces of steel plates, then strength is improved, but durability decreases due to sensitivity to external environments such as weather
Solution Approach 1:
The patent places the reinforcing material inside insertion parts (grooves or cavities) of the sidewall structure, nesting it within the overall sidewall geometry. This nested configuration protects the reinforcing material from direct exposure to weather while maintaining its load-bearing function.
Solution Approach 2:
The sidewall structure itself acts as a protective shell that encloses and protects the reinforcing material. The sidewall forms a protective barrier against environmental factors while allowing the reinforcing material to function internally.
3Strength
If conventional composite structure with multiple steel plates is used, then strength is improved, but weight of equipment increases
Solution Approach 1:
The patent uses a composite structure combining a base sidewall material with reinforcing material having different properties. The reinforcing material is strategically placed within insertion parts to provide enhanced strength and stiffness while minimizing weight increase through optimized material distribution.
Solution Approach 2:
The patent applies reinforcing material locally at specific positions where strength is needed most, rather than uniformly throughout the entire structure. The insertion parts are positioned to provide reinforcement at critical stress points, optimizing the strength-to-weight ratio.
Data Source
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AI summary
The present invention relates to a boom for aerial work equipment, in which a reinforcing material (e.g., carbon fiber) capable of significantly improving strength against a bending load and a lateral load as well as yield strength against a partial load, which locally occurs, and minimizing a weight of the equipment is installed to be inserted into the inside or outside of a sidewall.