Telescopic Boom Electric Coupling to Replace Hydraulic Actuation
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Solution Overview
Problem
The use of hydraulic actuators in telescopic booms reduces the design freedom around the crane due to the need for hydraulic circuits, limiting flexibility and efficiency.
Innovation Solution
A crane design utilizing electric drive sources and coupling mechanisms to control the extension and contraction of telescopic booms, eliminating the need for hydraulic actuators and allowing for enhanced design flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If hydraulic actuators are used to control the telescopic boom, then the extension and contraction function is achieved, but the degree of freedom in design around the telescopic boom is reduced due to the need for hydraulic circuits
Solution Approach 1:
The patent replaces hydraulic actuators with an electric motor-driven winding mechanism. The electric motor (22) winds or unwinds a rope (23) to extend or contract the telescopic boom (14), eliminating the need for hydraulic circuits and thereby improving design freedom and reducing system complexity.
2Productivity
If hydraulic actuators are used for boom extension, then the extension function is achieved, but the overall system efficiency is reduced
Solution Approach 1:
The patent substitutes the hydraulic actuation system with an electric motor-driven rope winding system. This replacement reduces energy loss by eliminating hydraulic fluid leakage and friction, thereby improving overall operational efficiency and energy utilization.
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
Improves the degree of freedom in designing telescopic booms by using electric drive sources and coupling mechanisms, enhancing operational efficiency and flexibility.
Implementation Method 1
an electric motor that winds or unwinds the rope to extend or contract the telescopic boom
Data Source
Figure 1
Figure 2A~2E
Figure 3A~3B
AI summary
This crane is configured by being provided with: a telescopic boom having an inside boom element and an outside boom element that overlap each other in an extendable and contractible manner; an extension/contraction actuator that displaces one boom element among the inside boom element and the outside boom element in the extending and contracting directions; at least one electric drive source provided in the extension/contraction actuator; a first coupling mechanism that operates on the basis of power from the electric drive source and that switches between the coupled state and the uncoupled state of the extension/contraction actuator and one of the boom elements; and a second coupling mechanism that operates on the basis of power from the electric drive source and that switches between the coupled state and the uncoupled state of the inside boom element and the outside boom element.