Construction Machine Electric Actuator for Boom Swing
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Solution Overview
Problem
Existing construction machines rely solely on hydraulic power sources for swinging the boom, lacking alternatives that could potentially offer more efficient and versatile drive solutions.
Innovation Solution
Implementing an electric actuator with a drive device comprising an electric motor that outputs torque centered on a rotation axis, connected to a swing bracket which rotates about a slew axis, allowing the boom to swing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a hydraulic power source is used to swing the boom, then the boom can be driven, but the system lacks versatility and efficiency
Solution Approach 1:
The patent replaces the hydraulic power source with an electric motor to drive the boom swing mechanism. This substitution eliminates the need for hydraulic fluid, pumps, and associated control systems, thereby reducing device complexity while increasing versatility by allowing integration with the construction machine's existing electrical system. The electric motor provides a cleaner, more efficient alternative that can be precisely controlled through electrical signals.
2Productivity
If an electric motor is used to drive the boom, then efficiency and versatility improve, but new design considerations are introduced
Solution Approach 1:
The electric motor is designed to serve multiple functions: it provides driving force for boom swing, can be integrated with the construction machine's existing electrical control system, and replaces the need for separate hydraulic systems. This multi-functionality increases productivity by streamlining the power transmission path while the standardized electric motor design keeps the added complexity manageable.
3Loss of energy
If hydraulic systems are replaced with electric actuators, then energy efficiency improves, but manufacturing and installation requirements change
Solution Approach 1:
The patent extracts and eliminates the hydraulic system components (hydraulic fluid, hoses, pumps, valves) from the boom drive mechanism, replacing them with a compact electric motor and direct drive mechanism. This extraction reduces energy transmission loss by eliminating hydraulic inefficiencies while the modular electric actuator design simplifies manufacturing and installation compared to complex hydraulic assemblies.
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
Enables the boom to swing using an electric motor as a drive source, providing a more efficient and versatile alternative to hydraulic power sources.
Implementation Method 1
a drive device including an electric motor, the drive device being configured to output torque centered on a rotation axis
Data Source
AI summary
An electric actuator for a construction machine includes a drive device having an electric motor and configured to output torque centered on a rotation axis, and a swing bracket fixedly attached to a boom. The swing bracket is configured to rotate about a slew axis parallel to the rotation axis or the rotation axis upon application of the torque from the drive device.