Under the Hook Lifting Device with Sliding Counterweight Trolley
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Solution Overview
Problem
Existing under the hook lifting devices are not easily adjustable for varying object weights and often struggle to fit into small or narrow spaces, particularly when lifting objects in and out of boats or other confined environments.
Innovation Solution
The design incorporates a boom with a winch-adjustable strap, a counterweight, and a trolley system that allows for sliding along the boom to maintain a horizontal position, enabling easy weight adjustment and compact operation, with a pendant control for motorized operation and incremental adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing under the hook lifting devices are used, then lifting function is provided, but they are not easily adjustable for varying object weights and cannot fit into small or narrow spaces
Solution Approach 1:
The lifting device employs a trolley that can slide along the boom to dynamically adjust the position of the counterweight, enabling adaptation to varying object weights. The strap length is also dynamically adjustable through a winch system, allowing the device to accommodate different lifting scenarios and weight ranges from 0 to 10,000 lbs.
Solution Approach 2:
The lifting device is divided into separable functional components including the boom, trolley, counterweight, and adjustable strap system. This segmentation allows independent adjustment of each component to optimize performance for different weight requirements while maintaining overall system functionality.
2Area of stationary object
If existing under the hook lifting devices are used, then lifting function is provided, but they cannot fit into small or narrow spaces
Solution Approach 1:
The trolley slides along the boom to dynamically reposition the counterweight, allowing the device to operate in confined spaces by adjusting the horizontal position of the counterweight relative to the load, thereby reducing the space footprint while maintaining lifting capability.
3Stability of the object's composition
If a counterweight system is added to maintain horizontal boom position, then lifting stability is improved, but device complexity increases
Solution Approach 1:
A counterweight is attached to the boom through a sliding trolley mechanism. The counterweight compensates for the weight of the strap and suspended object, maintaining the boom in a substantially horizontal position during lifting operations, thereby improving stability and control.
4Adaptability or versatility
If winch-adjustable strap is implemented, then adaptability to different weights is improved, but device complexity increases
Solution Approach 1:
The manual mechanical adjustment system is replaced with a motorized winch mechanism that provides automated strap length adjustment. This substitution enhances adaptability to different weights through motorized control while reducing the physical complexity of manual adjustment mechanisms.
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 configuration allows for safe and efficient lifting of objects from 0 to 10,000 lbs, accommodating different weights and fitting into tight spaces, enhancing usability and versatility in various environments.
Implementation Method 1
a winch positioned on the boom, where the winch is configured to adjust the length of the strap extending downwardly from the first end of the boom
Implementation Method 2
a counterweight extending downwardly from the second end of the boom, and a trolley positioned at the second end of the boom, where the trolley is slidable along the boom. The counterweight is supported by and movable with the trolley, where the position of the trolley along the boom is movable to maintain a substantially horizontal position of the boom
Data Source
AI summary
An under the hook lifting device configured to lift an object is provided. The lifting device includes a boom having a first end and a second end, and a strap having a length extending downwardly from the first end of the boom, where the strap is configured to be secured to an object. A winch is positioned on the boom, where the winch is configured to adjust the length of the strap extending downwardly from the first end of the boom. The lifting device also includes a counterweight extending downwardly from the second end of the boom, and a trolley positioned at the second end of the boom, where the trolley is slidable along the boom. The counterweight is supported by and movable with the trolley, where the position of the trolley along the boom is movable to maintain a substantially horizontal position of the boom. Methods of lifting an object with a lifting device are also provided.