special winch

[AngeloB]

Hello, everyone.
I attach two photographs of a special winch that is often mounted on board large sailboats.
as you can see from the photos, the salient feature is to have the suspended cable postponed to 90°. i.e. the cable comes out parallel from the cable drum.
These winches are produced by many specialized companies, the one shown is Dutch, I suppose they are used to quickly insulate the frog.
they have courses ranging from 1 to 15 tons and are very fast.

The feature I care about, which I would like to copy, is the cable winding shuttle.
the mechanism that allows to wrap the cable in an orderly manner on a drum is arch-note (it is a double screw without end and a shuttle) but it is only studied to move back the cable and not to hold all the rope shot.
Do you have any idea how such a mechanism can work?
I thought of a screw recirculation of spheres, but is it possible, on the same axis to have a dx screw and a sx?
thanks for the help

 

[cacciatorino]

Do you have any idea how such a mechanism can work?
I thought of a screw recirculation of spheres, but is it possible, on the same axis to have a dx screw and a sx?
thanks for the help

These devices are widely used on cable rebodies. There's usually a bar with a cart carrying tilted rollers. the bar always rotates in the same direction, varying the tilt of the rollers compared to the bar you change both the winding sense and the step. on this cart will be mounted your referral pulley
Please note that you typically need a mechanical transmission between the coil and the bar that translates the cart, so that at a coil turn always corresponds a cable step, although as the winding increases the coil diameter changes.
These objects are called stratificators.
http://www.uhing.com/index.php?sp=en&id=779

 

[AngeloB]

thanks hunter for the link, it is very interesting. I stayed at the Stone Age.
from how hò understood the mechanism of the uhing works by friction, the forces that the shuttle transmits are at most 360 dan, with a non negligible bulk.
in the winches/ reel winches, the shuttle transmits from 1000 dan to 15000 dan (all the shot of the winches) with a very small footprint.
look at these sites:http://www.rondal.com/index.php?pag...id=21&page=content_content.php&page_name=reel winches

 

[cacciatorino]

in the winches/ reel winches, the shuttle transmits from 1000 dan to 15000 dan (all the shot of the winches) with a very small footprint.

Sorry I figured out whistles for whistles.

the layerer with inverter serves when you have to deposit several layers of cable on the core of the coil, so the pulley carriage must move from right to left and vice versa while the coil performs or wraps always rotating in the same direction.

In the examples placed on the other hand, it seems to me that the layer is unique, that is, when the drum is filled, there is no other layer of rope but it stops there. correct me if I'm wrong.

If so, you don't need to reverse the carbide motion, because when this swept all the length of the coil, you don't have to go back. then you just need a simple screw with an adequate transmission between coil and screw, so that at every lap of the reel, the screw makes so many turns to move the cart of a quantity equal to the diameter of the rope. I hope I've been clear and understood.

 

[AngeloB]

Yes, now you understand, effectively works this way.

Thank you.