Lifting Transportation Device Drawbar Coupling Skipping Risk
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Solution Overview
Problem
Existing lifting transportation devices for load platforms, particularly in ports and industrial environments, face issues such as the risk of 'skipping' due to high torque caused by fifth wheel arrangements, leading to inefficiencies and increased maintenance costs, and are structurally complex and expensive.
Innovation Solution
A lifting transportation device combination featuring a compact drawbar with a ball joint or crosslink coupling mechanism, eliminating the need for a fifth wheel arrangement, and utilizing an actuator arrangement to adjust the height of the support surface, which reduces the risk of skipping and simplifies equipment and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fifth wheel arrangement is used to connect the pulling device and lifting transportation carriage, then the coupling and height adjustment function is achieved, but high torque causes skipping risk and increased device complexity
Solution Approach 1:
The patent extracts and eliminates the fifth wheel arrangement from the system, replacing it with a direct drawbar coupling mechanism. This removal of the problematic fifth wheel component directly reduces the skipping risk and simplifies the overall device structure while maintaining the essential coupling and height adjustment functions through alternative means.
Solution Approach 2:
Instead of using a fifth wheel arrangement that requires the pulling device to accommodate complex mechanical interfaces, the patent inverts the approach by using a simple drawbar with coupling means that attaches to the lifting transportation carriage. This reversal of the coupling strategy eliminates the high torque issues associated with fifth wheel mechanisms.
2Length of moving object
If the pulling point height is increased for ground clearance, then the pulling device can navigate obstacles, but torque increases causing skipping
Solution Approach 1:
The patent removes the fifth wheel arrangement that caused the torque increase when raising the pulling point. By eliminating this mechanical interface, the system can achieve necessary ground clearance without experiencing the excessive torque and skipping that occurred with the fifth wheel mechanism.
3Adaptability or versatility
If a fifth wheel arrangement with height adjustment is used, then coupling flexibility is improved, but equipment complexity and maintenance needs increase
Solution Approach 1:
The patent extracts the fifth wheel arrangement and replaces it with a simplified drawbar coupling system. This elimination maintains coupling flexibility through the drawbar's inherent design while removing the complex height adjustment mechanisms of the fifth wheel, thereby reducing equipment complexity and maintenance requirements.
Solution Approach 2:
The patent replaces the complex mechanical fifth wheel height adjustment system with a simpler coupling mechanism. The drawbar with coupling means provides the necessary adaptability without requiring the elaborate mechanical systems of the fifth wheel arrangement, thus reducing overall device complexity.
4Device complexity
If the pulling device structure is simplified by removing the fifth wheel, then device complexity decreases, but coupling and height adjustment capability must be maintained
Solution Approach 1:
The patent merges the coupling and height adjustment functions into the drawbar assembly itself. The drawbar with coupling means integrates these capabilities directly into the simplified structure, eliminating the need for separate fifth wheel mechanisms while maintaining full coupling and height adjustment functionality.
Solution Approach 2:
The drawbar with coupling means serves multiple functions: it provides the coupling connection between pulling device and lifting transportation carriage, enables height adjustment, and maintains adaptability. This multi-functional design replaces the specialized fifth wheel arrangement, achieving simplification without sacrificing capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances safety and efficiency by minimizing the risk of skipping, reducing equipment complexity and maintenance needs, and lowering the strain on pulling devices, resulting in cost-effective and safer load handling operations.
Implementation Method 1
The actuators, being typically used, comprise hydraulic actuator organs
Implementation Method 2
an actuator arrangement driven by auxiliary power, such as being mechanically, electrically, pressure medium operated
Implementation Method 3
a ball joint or crosslink coupling mechanism
Implementation Method 4
the drawbar turning in vertical plane by means of a joint arrangement
Data Source
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AI summary
The invention relates to a lifting transportation device combination, the purpose of which is handling of load (Y) that is carried out with load platforms (K), such as RoRo, terminal, industrial cassettes and/or the like. The combination comprises a lifting transportation carriage (1) and a pulling device (2) that has at least power transmission means for power transmission of a drive function of the lifting transportation device combination and for a lifting function of the lifting transportation carriage in order to lift up and lower down the load on the load platform (K, Y). The lifting transportation carriage (1) comprises a drawbar (6) provided with coupling means (5) in order to couple the same rotatably, such as on ball joint, crosslink principle or correspondingly, and in a lockable manner with a fifth wheel (VP) of the pulling device. An actuator arrangement altering the height of the support surface (lk) of the lifting transportation carriage at front end (I) thereof is arranged when a support surface (lk) of the lifting transportation carriage is being lowered to push the lifting transportation carriage backwards (t) from the pulling device (2) when viewed in longitudinal direction (s) of the lifting transportation device combination for positioning a load platform with load against a corresponding load platform with a load that exists directly behind the same.