Asymmetric Crane Support Beam Configuration
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Solution Overview
Problem
Existing crane support configurations often result in reduced stability and payload capacity due to uneven spacing of tilt edges, limiting the maximum permitted payload and stability across a 360° slewing radius.
Innovation Solution
A crane support system with two pairs of support beams, where the first beams have a smaller maximum deployment range than the second beams, allowing for optimized distribution of load and stability by maximizing the spacing between the center of rotation and tilt edges, while minimizing the loss of support width and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the spacing of the slewing platform contact point from one of the tilt edges is reduced, then the crane structure becomes more compact, but the crane loses stability and load bearing capacity in the direction of the reduced spacing
Solution Approach 1:
The patent applies asymmetry by configuring support beams with different maximum deployment ranges. Specifically, at least one support beam has a smaller maximum deployment range than another support beam, creating an asymmetric support structure. This asymmetric configuration allows the crane to achieve compactness in certain directions while maintaining adequate spacing and stability in critical directions, thereby resolving the contradiction between structural compactness and stability.
2Weight of moving object
If the maximum deployment range of support beams is reduced, then the support structure becomes lighter and less expensive, but the spacing between the center of rotation and tilt edges is reduced, affecting stability
Solution Approach 1:
The patent applies local quality by assigning different deployment ranges to different support beams based on their specific functional requirements. Instead of uniformly reducing all support beam deployment ranges, the invention selectively configures at least one support beam with a smaller maximum deployment range while maintaining adequate deployment ranges in other directions. This localized differentiation allows the crane to reduce overall weight and cost while preserving critical stability characteristics where needed.
3Ease of manufacture
If the support beams are configured with different maximum deployment ranges, then the support structure becomes lighter and more cost-effective, but the uniformity of stability across all tilt edges is compromised
Solution Approach 1:
The patent embraces asymmetry as a deliberate design choice to achieve cost-effectiveness. By configuring support beams with different maximum deployment ranges, the invention reduces manufacturing costs and structural weight. The asymmetric configuration is carefully designed to maintain adequate stability across all tilt edges, recognizing that uniform stability across all directions is not always necessary for safe and effective crane operation.
Solution Approach 2:
The patent applies parameter changes by varying the maximum deployment range parameter of different support beams. This parameter differentiation allows the crane to achieve cost-effectiveness through optimized material usage and simplified manufacturing, while the varied parameters are selected to maintain sufficient stability characteristics for safe operation across the working range.
Data Source
AI summary
The present disclosure relates to a support for a crane, in particular for a mobile crane, having at least two first support beams and two second support beams that are each arranged pairwise at mutually oppositely disposed sides of the support.