Jib Crane Tension Frame and Compression Support
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Solution Overview
Problem
Existing crane systems face challenges in being strong, stable, easy to install, and flexible for various environments, with a need for compact support, easy 360° rotation of the jib boom, and minimal environmental constraints on assembly and operation.
Innovation Solution
An interconnected boom support system with a cylindrical post and pivot structure, combining compression and tension roller engagement assemblies for structural support and counterbalancing, allowing for easy rotation and load handling, and a substrate interface-support arrangement for versatile mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional crane support system is used, then the structure is simple, but the crane lacks stability and strength when handling loads
Solution Approach 1:
The support system is divided into separate compression and tension components. The compression support handles downward forces while the tension frame handles upward forces, allowing each component to be optimized for its specific function and collectively providing superior load handling strength.
Solution Approach 2:
The invention merges compression and tension support mechanisms into a unified system. By combining these opposing force handlers into one integrated support structure, the crane achieves both high strength and stability without requiring multiple separate systems.
2Ease of operation
If the boom is heavily supported to maintain strength, then the crane is stable, but the boom rotation becomes restricted and cumbersome
Solution Approach 1:
The pivot point is extracted from the traditional fixed support location and repositioned to where it naturally occurs under load. This allows the boom to rotate freely at the load-induced pivot point while the compression and tension supports provide stability without restricting rotation.
Solution Approach 2:
The support system adapts dynamically to the load position. As the boom rotates and loads shift, the compression and tension components automatically adjust their force distribution, maintaining stability throughout the rotation range without mechanical constraints.
3Area of stationary object
If a compact support footprint is used, then the crane is space-efficient, but the structural stability is compromised
Solution Approach 1:
The support system transitions from a horizontal footprint-based stability approach to a vertical dimension approach. By using the height of the crane structure and the tension frame extending upward, stability is achieved through vertical force distribution rather than requiring a large horizontal base area.
4Ease of manufacture
If the crane is designed for easy assembly and mobility, then installation is simplified, but the structural strength and durability are reduced
Solution Approach 1:
The crane is divided into modular segments including the boom, compression support, tension frame, and counterweight. These standardized modules can be manufactured separately and assembled through simple connections, enabling easy assembly while maintaining structural integrity through optimized joint designs.
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 system provides a strong, stable, and compact crane with easy installation and operation, enabling 360° rotation of the boom without sacrificing strength, and minimizes environmental constraints on assembly and operation, facilitating smooth load handling and durability.
Implementation Method 1
A compression roller engagement assembly is provided at a lower end of the compression support and is positioned for rotatable engagement around an outer surface of the cylindrical pole. A tension roller engagement assembly is secured to the tension frame and is also positioned for rotatable engagement around the outer surface of the cylindrical pole.
Data Source
AI summary
A jib crane assembly having a vertical pole and a boom for lifting a load. The pole has a length and cylindrical outer surface. A pivot structure is arranged at an upper segment of the pole such that the boom is rotatably secured at a pivot point, thereby dividing the boom into first and second portions. A compression support extends from the first portion of the boom to a compression roller engagement assembly, and a tension roller engagement assembly is secured to the second portion of the boom, opposite the compression roller assembly. The tension roller assembly is attached to a tension frame, wherein said compression support, compression roller assembly, tension frame, and second portion of the boom provide structural support and counter-balance when lifting the load, and the pivot structure and roller assemblies facilitate rotation of the load around the pole.