Winder Cable Guard Plate Design for Jam Prevention
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Solution Overview
Problem
Conventional boat lift winders experience operational issues due to the gap between the winder drum and the support bearing, causing cable jamming, pinching, and breakage, leading to costly repairs and downtime.
Innovation Solution
A cable winder guard with a plate component attached to the bearing, featuring protuberances that block the cable from slipping into the gap and ensure uniform winding by nesting successive turns between underlying layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a gap is formed between the winder drum and support bearing for assembly tolerance, then the winder can be easily manufactured and assembled, but the cable may slip into the gap and become jammed or pinched
Solution Approach 1:
A cable guard plate is introduced as an intermediary component between the winder drum and the support bearing. The plate fills the clearance gap and prevents the cable from slipping into the gap, while allowing the drum and bearing to be assembled with standard tolerances. This mediator resolves the contradiction by maintaining both manufacturing ease and cable reliability.
Solution Approach 2:
The support bearing assembly is segmented into two parts: the bearing itself and the attached cable guard plate. This segmentation allows the bearing to be manufactured with standard tolerances while the separate plate provides the cable protection function, resolving the conflict between assembly tolerance and cable reliability.
2Productivity
If the cable is wound tightly on the winder drum to improve lifting efficiency, then the lifting speed increases, but the cable may become wedged between the drum and bearing
Solution Approach 1:
The cable guard plate serves as a mediator that allows tight cable winding for high productivity while preventing the harmful wedging effect. The plate provides a physical barrier that stops the cable before it can be forced into the gap between drum and bearing, even under high tension conditions.
3Area of stationary object
If the winder drum is positioned close to the bearing to minimize space, then the device size is reduced, but the cable may fall into the small gap and cause damage
Solution Approach 1:
The cable guard plate is positioned in the minimal space between the drum and bearing, acting as an intermediary that prevents cable damage without requiring additional space. The plate thickness is optimized to fill the gap while maintaining compact overall dimensions of the winder mechanism.
4Reliability
If a cable guard is added to prevent cable jamming, then cable reliability improves, but the device complexity increases
Solution Approach 1:
The cable protection function is segmented into a separate, simple plate component rather than being integrated into the complex drum or bearing structures. This segmentation maintains reliability while minimizing the addition of complexity, as the plate is a straightforward attachment piece.
Solution Approach 2:
The cable guard plate serves multiple functions: it prevents cable jamming, guides cable placement, and can be attached to various bearing types. This multi-functionality justifies the added component by providing multiple benefits from a single simple element, reducing the net increase in complexity.
Data Source
AI summary
A winder cable guard includes a generally flat plate that is attached to an inwardly facing surface of the outer support bearing in a winder mechanism. The plate is sized and configured to fit within and seal the clearance gap between the outer end of the winder drum and the outer support bearing. This prevents a cable being wound onto the winder drum from slipping or falling into the gap. The potential for jamming and/or breakage of the lift cable is thereby reduced.