ector
Guest
do you know how to draw a wheel with an endless screw that gear? I can't find anything on the web...
Preparation-H
Guest
Hi.
go to the site of bonfiglioli http://www.bonfiglioli.com/vfpres_it.html see if you find the product you need, then at the top under services -> mosaic engineering, you register and you can download the drawings in 2d/3d format of all sizes... :finger:
If not there are also those of the north, or of the varvel, all these producers make available on their site a configurator that allows once created the reducer we need, to download the design 2d or the model 3d.
Hi.
p-h
gerod
Guest
What do you mean? ? ?
She draws you an endless screw and then her crown.
Where's the problem?
find something ready?
if you have to make it design it as well but if you have to buy it from business what sense does it have to waste time on the details?
draws a cylinder for screw and one for wheel.
if you need anything from the ready I would say you have to buy some 3d software plug-ins you use or go around on dedicated sites (partserver.. . ).
I design them with if but I have the classic version!!
Hi.
sampom
Guest
I see you use swx.
they draw (model) knowing the parameters (and these you know them according to what you need) with cuts and/or sweep extrusions according to the profile of your teeth. .
but it is a useless job if not for educational or "visual" purposes.
do as gerod says.
greetings
Mar
ector
Guest
a question maybe idiot, with screw system to crown the system is retrograde? i.e. if I turn the crown the screw turns?in my opinion I think no... or better I found nothing to say it... .
cacciatorino
Guest
depends on the transmission ratio. on the catalogs is specified if the pair you're choosing is reversible or not.
ector
Guest
If I build it?
cacciatorino
Guest
then you have to deal with the angle of the propeller, friction coefficient and tilted plane.
ector
Guest
perfect thank you....it will be fun!
marcof
Guest
You've already written a hunter:"depends on the transmission report"then summarized we can say that :bekle::bekle: : depends on the transmission ratio.
gerod
Guest
depends on what you need this vsf.
know that the yields of such a system are low (although lately the manufacturers of gearboxes have studied interesting profiles that reduce friction).
If I were you, I'd take something already done.
if you have no experience of vts risks that at the first blow this does not work.
Hi.
know that the yields of such a system are low (although lately the manufacturers of gearboxes have studied interesting profiles that reduce friction).
If I were you, I'd take something already done.
if you have no experience of vts risks that at the first blow this does not work.
Hi.
cacciatorino
Guest
I agree, this is a producer of luxury stuff.
http://www.renold.com/products/gears/loosegears/commercial_wormgears.asp?menulinkid=535&menuid=48but maybe even red motors and bonfiglioli can provide simple helical pairs, without the crate of the driver. Of course the assembly of these couplings is not absolutely banal!
Fulvio Romano
Guest
endless screw transmission is always irreversible. 'retrograde' is not an adjective that applies to broadcasts.
Although what it says hunter could be true (depending on the opening of the friction cone), a possible transmission to unreversible screw, would have a transmission ratio comparable to a wheel-pignon transmission, but with a performance (and therefore a wear) clearly lower; ergo doesn't make any sense to use it. Also you would have a toothed wheel with three or four teeth, no more...
with regard to the designation of the coupling...the longitudinal section of the unfinished screw should be dimensioned as a rack. if you use evolving profiles you can refer to the modular designation.
cacciatorino
Guest
In theory it is as you say, but I remember last year we had mounted a mvf bonfiglioli with rapp. 1:7 and it was very reversible, in fact during the tuning we could move forward and back the cart that was moved by a belt that took the bike from the slow shaft of the reducer. It's not like it should work that way, it was just a secondary effect.
there are reasons to choose v.s.f. gearboxes in some applications, not least that they are easily available on the market and very cheap.
In case the mechanism doesn't have to undergo retrograde motion, maybe even under the effect of vibrations, it's better to put a self-frenating motor, even if the manufacturer told us that the gearbox with that transmission ratio is irreversible, because then in real life things often don't go as planned.
Fulvio Romano
Guest
I feel new... but I could be wrong, it's not my field.
Are you sure this isn't just about game? often the gearboxes at vsf always work in grip and therefore does not look after the preload. . .
Are you sure this isn't just about game? often the gearboxes at vsf always work in grip and therefore does not look after the preload. . .
cacciatorino
Guest
No no, we could have him do even ten laps back and forth pushing him from the slow tree instead of the fast one. . .
p.s.: It's part of those metroplitane legends that tell us at university:
1) the helical couple is irreversible
2) Liquids are incomprehensible
3) ....
As soon as I'm thinking of other teachers, I'll add them!
davide75
Guest
sampom
Guest
Yes, I do.
but it seems to me that no one is guaranteed irreversibility.
depends on the angle of propeller that in theory always has a resulting "rotoaxial"
smile: how to call it?) that tends to decrease for values near 0; to "zero" would be nothing... couples are always helical, so never.greetings
Mar
sampom
Guest
in theory:biggrin:
It's basically like a hunter. and if you think about it there is no wonder.
I too all the translators of all the reports I have tried were reversible if subjected to a sufficient couple (so as to remain amazed just out of the school; Then after 25 years I made a reason:smile
.... of course it is not a good job for the reducer.greetings
Marco:smile:
cacciatorino
Guest
I attach an extract from the bonfiglioli catalogue