reducer

[Fedi]

Good morning to all,
I am designing a orthogonal axle reducer and I would like to ask you an opinion on some aspects:

-Being required the use of a couple of conical wheels is it better to put it as first incoming or as last?
(I would have thought as the last couple so that, turning to a much smaller number of turns than the one in the input, reduce wear)
-I thought of straight teeth wheels (to simplify assembly and bearing choice), and lock them on the shaft with a conical compass:
Is it okay to block them? Anything else?

thanks to all

 

[Fedi]

If you don't want to use a compass, is the only key to block "totally" a toothed wheel on a tree?

 

[Marpozio]

If you don't want to use a compass, is the only key to block "totally" a toothed wheel on a tree?

I would say that a key (correctly sized) could be enough as long as you use a wreath or a seeger on the side of the tilt.
in my project I remember that I used a key-distantial-cuscinetto-seeger system (the last for safety) with the calibrated spacers so as to impose that the duration of the bearings of that tree are multiple each other (but I couldn't).

 

[Fedi]

looking for some solutions I saw one in which you used a tab (which is also very suitable in my case having a high speed for which it would guarantee better accuracy) and the wheel was stuck on one side with a shouldering on the shaft on the other with the inner ring of the bearing itself (poi in turn blocked with a seeger) avoiding using the spacer.
Is it an adoptable solution?

 

[Marpozio]

for low efforts the tab can go (if in the project you don't have to worry about costs, then size a groove), but I don't like the fact that I don't have a space between the bearing and the wheel. Usually the wheel hub is higher than the inner radius and is likely to rub with the outer one. verify that there are at least 2-3 mm between the outer radius and the hub and then decide whether to adopt a spacer (te the council cmq.)

 

[Fedi]

thanks to the advice, I think I will use the tab on the incoming tree (wheel to 5000 rpm) and the outgoing grooved profile (75rpm) and also the spacer to not run this risk. would you also suggest me on the positioning of the couple of conical wheels?

 

[meccanicamg]

Good morning to all,
I am designing a orthogonal axle reducer and I would like to ask you an opinion on some aspects:

-Being required the use of a couple of conical wheels is it better to put it as first incoming or as last?
(I would have thought as the last couple so that, turning to a much smaller number of turns than the one in the input, reduce wear)
-I thought of straight teeth wheels (to simplify assembly and bearing choice), and lock them on the shaft with a conical compass:
Is it okay to block them? Anything else?

thanks to all

First it would be enough to go to a catalog and copy the operation.
second thing, look in the forum that we have designed so many gearboxes of this type and correct.
conical pairs are suitable for a high rotation regimen and do only by precouple with low reduction ratios, so they mount in input and not out of a reducer.
Helicoidal teeth gears with a helical angle are much less flasked and are suitable for having a replenishing factor (number of teeth intake) greater than those with straight teeth. It is true that there are components of axial force. with these wheels you can make stages with reduction ratios up to 7 and something beyond.
conical compasses are the worst thing ever because they enjoy an eccentricity that creates problems especially at high regimes. are strictly prohibited.
are used barrel bearings or two rows of rollers or balls with oblique contact....tante different solutions depending on whether you want to make isostatic or hyperstatic trees. fixing systems can be safety wreaths and rosettes, seeger, blinded hats axially that pack.
Keys are taxally excluded due to the eccentricity that causes vibration.
tabs are adopted if the check to cut and pressure is verified, otherwise you go to grooved trees.

 

[Fedi]

You were completely exhausted, thank you!