Shovel Superstructure Lifting Beam With Synchronized Front and Rear Units
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Solution Overview
Problem
Existing methods for lifting the superstructure of a shovel require significant time and effort, often involving dismantling front attachments, and lack safety and ease of access for maintenance.
Innovation Solution
A lifting method and apparatus using a set of front and rear lifting units, including a lifting beam, that contact corresponding force applying points on the superstructure and counterweight, allowing the superstructure to be raised without detaching the bucket or front attachments, with synchronized lifting to maintain stability and level during the operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional lifting methods are used to raise the superstructure, then the superstructure can be lifted, but the operation requires significant time and effort and involves dismantling front attachments
Solution Approach 1:
The lifting apparatus is positioned and configured under the superstructure before the lifting operation begins. The front and rear lifting units are pre-placed at their respective lifting points, and the hydraulic system is pre-assembled, eliminating the need for dismantling front attachments during the lifting process.
Solution Approach 2:
The lifting system is divided into separate front lifting units and rear lifting units that can be independently positioned and operated. This segmentation allows the apparatus to lift the superstructure from multiple points simultaneously without requiring disassembly of the shovel's front attachments.
2Productivity
If the superstructure is lifted without dismantling front attachments, then operational efficiency is improved, but safety and stability during lifting may be compromised
Solution Approach 1:
The lifting apparatus applies force at specific localized points on the superstructure through front lifting units positioned at front lifting points and rear lifting units positioned at rear lifting points. This distributed localized support ensures stable and safe lifting without requiring dismantling of front attachments.
Solution Approach 2:
The lifting apparatus acts as an intermediary device between the ground and the superstructure, transferring the lifting force through properly positioned lifting units that contact the superstructure at designated lifting points, ensuring safe and controlled lifting operation.
3Force
If multiple lifting units are used to raise the superstructure, then lifting capacity and control are improved, but the complexity of the lifting system increases
Solution Approach 1:
The front lifting units and rear lifting units are integrated into a single lifting apparatus system that operates together to lift the superstructure. The hydraulic system combines the force from multiple lifting units, providing sufficient lifting capacity while maintaining a unified, manageable system configuration.
Data Source
AI summary
There is provided a method of lifting a shovel comprising an undercarriage and a superstructure with a counterweight. The method comprises configuring the shovel and a front lifting assembly and a rear lifting assembly on a lifting site in a lifting configuration wherein the front lifting assembly matches corresponding force applying points on a front portion of an undersurface of the superstructure and the rear lifting assembly matches corresponding force applying points on an undersurface of the counterweight, wherein at least one of the front and the rear lifting assemblies includes a lifting beam including a set of spaced-apart lifting units and an elongated beam extending inbetween; contacting the front lifting assembly and the rear lifting assembly with the corresponding force applying points on the undersurface of the front portion of the superstructure and the undersurface of the counterweight respectively; and starting a lifting operation to raise the superstructure to a desired height. There is also provided an apparatus for lifting the shovel from the ground surface.