Pivotable Chain-Sling Adjuster for Millimeter Load Alignment
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Solution Overview
Problem
Existing methods for aligning heavy construction parts with large dimensions are time-consuming and difficult, particularly when precise alignment is required, especially using length-adjustable threaded rods.
Innovation Solution
An arrangement using a length adjustment device with a pivotable housing, a drive shaft, drive wheel, friction disc brake, and gear mechanism, integrated into a chain sling, allows for quick and precise alignment of heavy loads by adjusting the length of tension cords.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If length-adjustable threaded rods are used for alignment, then the alignment can be performed with simple equipment, but the operation becomes difficult and time-consuming
Solution Approach 1:
The patent replaces the threaded rod adjustment mechanism with a winch drum and chain system. The winch drum (32) with friction disc brake (33) and gear mechanism (35) provides mechanical advantage, allowing easy adjustment of the tension cord length by winding or unwinding the chain (25.1). This substitution transforms the difficult manual threading operation into a simple crank-based winding operation.
2Productivity
If traditional alignment methods are used, then equipment simplicity is maintained, but alignment speed and precision are reduced
Solution Approach 1:
The patent introduces a dynamically adjustable length modification device (30) that can quickly change the effective length of the tension cord during the alignment process. The winch drum (32) with friction brake (33) allows for rapid length adjustments by simply cranking the chain (25.1), enabling quick response to alignment requirements without time-consuming manual adjustments.
3Measurement precision
If precise alignment is required, then alignment accuracy is improved, but the complexity and time required increase
Solution Approach 1:
The patent applies the length modification device (30) locally at specific points in the tension cord system, rather than requiring complex adjustment mechanisms throughout the entire alignment system. The winch drum (32) with friction brake (33) provides precise local control of chain (25.1) length, enabling fine-tuned alignment adjustments without increasing overall system complexity.
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
Enables safe, rapid, and delicate alignment of heavy loads with millimeter precision, adhering to safety regulations, using standardized chain slings and hoist mechanisms.
Implementation Method 1
a friction disc brake, which can be used to counterbalance the load wheel
Implementation Method 2
a gear mechanism, which couples the drive shaft to the load wheel
Implementation Method 3
at least two tension cords secured to and extending down from the carrier element, wherein the lower ends of the tension cords are designed for securing at respective different load engagement points on the load
Data Source
AI summary
An arrangement for aligning a raised load has a rigid carrier element and tension cords secured to and extending down from the carrier element. The lower ends of the tension cords are provided for securing at load engagement points on the load. One tension cord has a length adjustment device extending between upper and lower connection points. The length adjustment device has a housing pivotably secured to the upper connection point. A drive shaft is mounted rotatably in the housing. A drive wheel, a friction disc brake, a load wheel, and a gear mechanism, coupling the drive shaft to the load wheel, are arranged on the drive shaft. The load wheel has over its circumference chain link cavities for individual chain links of a chain sling guided around the load wheel. The chain sling is secured by one of its ends at the lower connection point.