Gantry Crane Rotating Members Assembly
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Solution Overview
Problem
Existing gantry cranes face challenges in assembly, stability, and safety when lifting heavy mechanical parts, requiring heavy machinery or excessive human force, and are not sufficiently rigid or stable.
Innovation Solution
A gantry crane design featuring a frame with at least three parallel members, a longitudinal rail for the lifting device, and second members that can rotate and move rigidly between two positions, allowing the gantry to be raised without external machinery or human force, enhancing stability and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the gantry beam is arranged at a sufficient distance from the ground to allow lifting to desired height, then the lifting capability is improved, but heavy machinery or excessive human force is required for assembly which is not available at all locations and poses physical risk to operators
Solution Approach 1:
The gantry crane is divided into modular components: a frame with multiple first members, second members that can be rotated into position, and a beam assembly. This segmentation allows the crane to be transported in manageable parts and assembled at location without heavy machinery, resolving the contradiction between achieving sufficient height and ease of assembly.
Solution Approach 2:
The second members are designed with rotational capability, allowing them to be positioned dynamically during assembly. They can be rotated between a first position (angled less than 90° with the first plane) and a second position (substantially perpendicular to the first plane), enabling operators to assemble the gantry at ground level and then raise it to the required height without external lifting equipment.
2Force
If the gantry is designed to lift heavy mechanical parts, then the lifting capability is improved, but the gantry is not sufficiently rigid and stable which endangers operators working near or under the gantry
Solution Approach 1:
Different parts of the gantry structure have optimized local properties: the frame provides structural support, the second members provide rotational adaptability, and the beam provides lifting capability. This local optimization ensures that each component contributes to both the lifting force and the overall stability, resolving the contradiction between heavy lifting capability and structural reliability.
Solution Approach 2:
The frame, second members, and beam are merged into an integrated structure where the second members connect the frame to the beam. This merging creates a unified system that distributes loads effectively, providing both the necessary lifting force for heavy mechanical parts and the stability required to protect operators working near or under the gantry.
Data Source
AI summary
A gantry crane and associated method of erection, the gantry including a frame having at least three first members; a longitudinal rail supported by the frame; and at least three second members extending between a first end portion and an opposite second end portion. Each second member can be connected to the frame by means for rigid connection and continuous rotational movement of the second member relative to the frame between a first position in which the second member forms an angle of less than 90° with the first plane and a second position in which the second member is substantially perpendicular to the first plane.