Winch Cable Jamming Prevention via Guide Pulley Alignment
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Solution Overview
Problem
Winch cables often jam during recovery operations due to being wound at an acute angle onto the winch drum, leading to tangling, damage, and safety hazards, especially when the recovery vehicle is positioned unevenly relative to the object being recovered.
Innovation Solution
A winch system with a heavy-duty bumper and strategically positioned pulleys and a swivel sheave maintains the winch cable perpendicular to the drum, utilizing extended cable lengths and stabilizing legs to prevent jamming and ensure stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the recovery vehicle is positioned relative to the vehicle to be recovered to enable cable attachment, then the recovery operation can proceed, but the cable cannot be maintained perpendicular to the drum axis causing it to jam
Solution Approach 1:
A guide pulley is introduced as an intermediary component between the cable and the drum. The guide pulley redirects the cable path so that it approaches the drum perpendicular to its axis, ensuring proper winding even when the recovery vehicle is positioned at various angles relative to the vehicle being recovered.
Solution Approach 2:
The cable routing is extended into a third dimension by using a vertically mounted guide pulley. This allows the cable to approach the drum from a different spatial direction, maintaining perpendicular alignment with the drum axis regardless of the horizontal positioning between vehicles.
2Adaptability or versatility
If the cable is allowed to wind at an acute angle onto the drum, then the recovery vehicle can be positioned more flexibly, but the cable becomes tangled and jams
Solution Approach 1:
The guide pulley serves as a mediator that decouples the relationship between vehicle positioning and cable winding angle. It allows the cable to maintain the required perpendicular angle to the drum while accommodating various positions of the recovery vehicle relative to the vehicle being recovered.
3Reliability
If manual un-jamming of the cable is performed, then the cable can be re-wound, but the process is time-consuming and dangerous
Solution Approach 1:
The guide pulley is installed in advance to prevent cable misalignment before it occurs. By ensuring the cable approaches the drum perpendicular to its axis from the beginning of the winding process, the system prevents jamming before it happens, eliminating the need for time-consuming manual intervention.
Solution Approach 2:
The guide pulley acts as a preventive measure that cushions against the harmful effect of cable misalignment. It ensures proper cable routing under all operating conditions, preventing the development of tangled cable situations that would require dangerous manual un-jamming.
4Productivity
If the cable is repeatedly un-jammed and re-wound, then complete winding can be achieved, but cable life is significantly reduced
Solution Approach 1:
The guide pulley is pre-installed to ensure correct cable routing from the start, preventing the repeated un-jamming and re-winding cycles that degrade cable life. This preliminary structural arrangement protects the cable throughout its entire service life.
Solution Approach 2:
The guide pulley provides continuous protection against cable misalignment and jamming, preventing the mechanical stress and damage that occur during repeated un-jamming operations. This extends the operational life of the cable by eliminating harmful stress cycles.
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 solution prevents cable tangling and damage, enhances operator safety, and allows for controlled cable movement, even when the recovery vehicle is positioned unevenly, reducing the risk of accidents and extending cable lifespan.
Implementation Method 1
A winch system with a heavy-duty bumper and strategically positioned pulleys and a swivel sheave maintains the winch cable perpendicular to the drum
Implementation Method 2
stabilizing legs to stabilize the recovery vehicle
Data Source
AI summary
A remotely controllable recovery vehicle winch/stabilizing system, having a vehicle bumper; a first pulley attached to the bumper's first end; a winch attached to bumper's second end; a second pulley approximately midway between the first pulley and said winch and adjacent a swivel sheave; a cable, directed by the first and second pulleys and the swivel sheave, to be wound or unwound about the winch, with the pulleys, the swivel sheave, and the winch operatively arranged with respect to each other so as to maintain the cable perpendicular, or nearly so, to the rotational axis of the drum as it is fed to or played off of the drum so as to prevent the cable from jamming as the cable is used to either recover or deposit an object, and a set of stabilizing legs each leg attached to said bumper so as to stabilize and secure the recovery or release apparatus.