Crawler Crane Double Link Leveling Mechanism
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Solution Overview
Problem
Crawler cranes require time-consuming and expensive preparation to achieve a basic operating position due to the need for precise leveling, which is challenging with existing technologies that rely on grading operations.
Innovation Solution
A crawler crane design featuring two crawler supports connected via rotating crawlers, a transversal bridge, and double links with an adjustment drive that allows for precise pivoting and leveling, utilizing a motor-driven or hydraulic system to compensate for roll inclination, thereby reducing the time and expense of setting up a basic operating position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If grading operations are used to prepare the basic operating position, then the crane can operate at nominal load, but the preparation time and expense increase significantly
Solution Approach 1:
The invention replaces static grading operations with a dynamic adjustment mechanism. The double link with adjustment drive allows the crane to actively compensate for ground inclination by pivoting the lower link, transforming the problem from requiring external ground preparation to enabling self-adjustment through mechanical means.
Solution Approach 2:
The invention changes the operational parameter from requiring horizontal ground (fixed condition) to allowing inclined ground with active compensation (variable condition). By adjusting the pivot angle of the lower link through the adjustment drive, the crane adapts to varying ground conditions, eliminating the need for precise grading.
2Reliability
If grading operations are used to prepare the basic operating position, then the crane can operate at nominal load, but the expense increases significantly
Solution Approach 1:
The dynamic adjustment mechanism eliminates the need for expensive grading operations by enabling the crane to self-level through mechanical adjustment of the double link, reducing preparation costs while maintaining operational reliability.
3Loss of time
If the undercarriage is set up with minimal pitch inclination compensation, then the setup time is reduced, but roll inclination remains uncorrected
Solution Approach 1:
The adjustment drive dynamically corrects roll inclination by pivoting the lower link, allowing quick setup without compromising leveling precision. The system achieves both rapid deployment and accurate leveling through active mechanical adjustment.
Solution Approach 2:
The invention replaces complex grading operations with a simpler mechanical adjustment system. The double link with adjustment drive provides precise roll compensation through controlled pivoting, substituting expensive and time-consuming grading with an efficient mechanical solution.
Data Source
AI summary
A level-controllable crawler crane includes two crawler supports with rotating crawlers, which crawler supports are connected by a transversal bridge. A superstructure of the crawler crane includes a crane jib pivotable about a vertical axis and connected to the transversal bridge. A pivotable articulation connects the transversal bridge to the crane superstructure. At least one of the crawler supports is connected to the transversal bridge by a double link having a lower and an upper link. The lower link is articulated on the crawler support by a crawler support lower pivotable axis and on the transversal bridge by a transversal bridge lower pivotable axis. The upper link is articulated on the crawler support by a crawler support upper pivotable axis and on the transversal bridge by a transversal bridge upper pivotable axis. A drive pivots the links about the pivotable axis associated therewith.