Cable Pulling Feed Mechanism With Positive Gear Engagement
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Solution Overview
Problem
Existing cable feed aids struggle with efficient power transmission to flexible strand materials, particularly when dealing with longer lengths or thicker diameters, and often require manual operation.
Innovation Solution
A device featuring a rotational conveying element with a contoured inner surface that matches the external contour of the strand material, coupled with a gear arrangement connected to a drive element, allowing for high power transmission and automated operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a friction-based conveyor device is used to move flexible strand material, then the device can be operated manually with simple construction, but the power transmission efficiency is insufficient for longer lengths or thicker diameters
Solution Approach 1:
The patent replaces the friction-based mechanical conveyor system with a gear-based positive engagement system. The contoured conveyor element with profiled outer contour engages positively with the strand material, transmitting rotational motion directly through gear teeth rather than relying on friction. This substitution enables high power transmission for longer cable lengths and thicker diameters while maintaining manageable device complexity through standardized gear components.
Solution Approach 2:
The patent changes the fundamental interaction parameter from friction-based contact to positive gear engagement. By designing the conveyor element with a profiled outer contour that matches the strand material geometry, the system transforms the transmission mechanism from passive friction to active mechanical interlocking, significantly increasing power transmission capability without proportionally increasing device complexity.
2Productivity
If manual operation is used to push strand material into conduits, then the device construction remains simple, but operator safety is compromised and productivity is limited
Solution Approach 1:
The patent implements automated operation where the gear-driven conveyor element automatically pushes the strand material into the conduit without requiring manual pushing. The system self-regulates the feeding process through the mechanical engagement between the contoured conveyor element and the strand material, eliminating the need for continuous manual intervention and thereby increasing productivity while keeping the device construction relatively simple.
Solution Approach 2:
The patent replaces manual mechanical pushing with an automated gear-driven rotational conveyor system. The contoured conveyor element, driven by a motor through gear reduction, automatically feeds the strand material into the conduit at controlled rates, significantly improving productivity and operator safety without requiring complex control systems.
3Force
If friction-based engagement is used between conveyor and strand material, then the device structure is simple, but the frictional force is insufficient for high power transmission
Solution Approach 1:
The patent replaces the friction-based engagement system with a gear-based positive engagement system. The contoured conveyor element features a profiled outer contour with teeth or lobes that mesh with corresponding features on the strand material, creating direct mechanical interlocking. This substitution generates significantly higher forces for power transmission while maintaining relatively simple device structure through standardized gear design principles.
Solution Approach 2:
The patent fundamentally changes the engagement parameter from friction coefficient to gear tooth geometry. By designing the conveyor element with a specific profiled contour that matches the strand material, the system transforms the force transmission mechanism from dependent on normal force and friction coefficient to dependent on gear tooth strength and engagement geometry, enabling high force transmission without increasing overall device 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
The device achieves high power transmission to the strand material, enabling efficient movement of flexible rods and cables, even over longer lengths, while allowing for automated operation, reducing manual effort and improving safety.
Implementation Method 1
the conveyor element is connected to the drive element via a gear arrangement
Implementation Method 2
a rotation of the conveyor element is transmitted to the strand material in such a way that the strand material is moved in the longitudinal axis direction
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a device for moving flexible stranded material (2), in particular as a cable pulling aid, especially flexible rods for pulling cables into cable protection pipes, comprising a housing (5) in which a conveying device for the stranded material is arranged, and a drive element that can be connected to a mechanical drive. In this device, it is provided that the conveying device has a rotatably driven conveying element with a receptacle for the stranded material (2), that the conveying element has a contoured inner surface (19) that can be positively connected to an outer contour (20) of the stranded material (2), wherein a rotation of the conveying element is transmitted to the stranded material (2) in such a way that the stranded material (2) is moved in the longitudinal axis direction of the conveying element, and that the conveying element is connected to the drive element (9) via a gear arrangement.