Cone Crusher Nut Lifting Tool with Surrounding Frame
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Solution Overview
Problem
Lifting nuts in cone crushers poses a risk of injury or material damage due to their weight and location, and existing lifting lugs can break or obstruct the crushing process.
Innovation Solution
A lifting tool with a frame that surrounds the nut, featuring lifting lugs, suspension brackets, lateral limiters, and connection pieces for cranes, allowing safe and secure lifting by supporting the nut from multiple sides and maintaining access to the crushing zone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If lifting lugs are formed in the nut, then the nut can be lifted, but the lugs break under crushable stone material or block the crushing process
Solution Approach 1:
The lifting function is separated from the nut itself and transferred to an external frame structure. The frame contains the lifting lugs at a distance from the nut, preventing material interference while maintaining lifting capability.
Solution Approach 2:
The frame acts as an intermediary between the crane and the nut. Instead of attaching lifting lugs directly to the nut, the frame provides a protective intermediate structure that prevents stone material from reaching and damaging the lifting components.
2Ease of operation
If lifting lugs are formed in the nut, then the nut can be lifted, but the lugs obstruct the flow of crushed stone material
Solution Approach 1:
The lifting function is spatially separated from the crushing zone by positioning the frame and its lugs away from the nut's central axis, ensuring material flow is not obstructed.
Solution Approach 2:
The lifting structure is moved from the vertical axis (where it would block material flow) to the horizontal perimeter area around the nut, allowing material to flow freely through the center while lifting occurs at the circumference.
3Productivity
If the nut is located over the conical structure, then the crushing function is maintained, but a failed lifting attempt may result in the nut falling on workers or material
Solution Approach 1:
The frame structure provides a protective enclosure around the nut before lifting begins. The lateral limiters and closed frame design prevent the nut from shifting or falling during the lifting process, cushioning against potential accidents.
Solution Approach 2:
The frame with its lateral limiters and suspension brackets applies preliminary constraining forces to prevent the nut from moving in dangerous directions before the actual lifting force is applied, countacting potential harmful movements in advance.
Data Source
AI summary
A nut lifting tool of an inner wear part of a cone crusher. The lifting tool has a frame to be placed around a nut to be lifted. The frame has nut lifting lugs for supporting occurring from at least three sides of the center of gravity of the nut and frame suspension brackets for suspending the frame from the nut before lifting the nut. The frame also has an open side for receiving a nut, lateral limiters, which, together with the lifting lugs and the suspension brackets, form a nut receiving space such that the frame can be slid from the open side to surround the nut, and lifting connection pieces for connecting a crane to the frame.