correct location key

[PALMA77]

hello to all, I have to place a stick on a tree that receives movement from a reducer (see attached scheme). the doubt that came to me is: what is the best place to put the key? position b, and why?
Hello, everyone, thank you.

 

[stefanobruno]

hello to all, I have to place a stick on a tree that receives movement from a reducer (see attached scheme). the doubt that came to me is: what is the best place to put the key? position b, and why?
Hello, everyone, thank you.

the key normally is long (intermediate space+b ).
on the catalog of the motors, in general, it is indicated how to realize the part of tree that pairs to the gearbox.
If you want to put a short (and you have a reduced load) the right position is in b because it is the closest one to use.
Incidentally, that elastic ring seat you have on the tree side use, make it disappear.
that is the point where the tree will break, guaranteed to lemon.

Bye.

 

[davide75]

If you don't put both of them so much you don't want a key or so much less the seat because to make the key pile the tree has already been placed on the machine tools

 

[gerod]

Incidentally, that elastic ring seat you have on the tree side use, make it disappear.
that is the point where the tree will break, guaranteed to lemon.

But if you don't put it, the tree-ended bar (wax + screw) will block the tree only in one way.
Better another joke rather!

for the rest, quoto in full.

 

[Mario SJPD]

Both keystrokes.. .
ok firm screwed in the head of the tree that so to the eye seems too long should stay for a couple of millimeters inside the motor so that you can screw it without getting to battutta on the stop
no seeger, or mechanical joke or better stop ring.

 

[gerod]

But... wrench or tab?
eye that the two things are different and usually we talk about stick instead of tab! !

 

[Dador]

palma, tzè mia a post!!!! :biggrin:

I've always known that du Keyette inline, as in example a and b, are a mistake because in practice only one of the two actually works (for the fact that the locations and the keystrokes themselves will never be perfectly equal).

What do you say?

 

[stefanobruno]

But if you don't put it, the tree-ended bar (wax + screw) will block the tree only in one way.
Better another joke rather!

for the rest, quoto in full.

I just suggested to take that trigger off the break.
if then we want to go on then, from below to high:
screw, washer, reducer with a long tongue, spacer, gear, spacer (no tab ), washer, screw.
the protruding tree or not is a matter of taste (and possibly tolerances accumulating)
in vw many years ago I made a plant where, to capitulate, the trees had to protrude from the reducer.
are, in fact, past years and still produces, without negative feed-backs.

Bye.

 

[SHIREN]

Hi.
usually if there are no commercial probes
in that situation we try to build a "millerighi"
the two online keystrokes do not work
in fact they put two to 30-45°
these are my experiences
Thank you very much

 

[sampom]

Hi.
usually if there are no commercial probes
in that situation we try to build a "millerighi"
the two online keystrokes do not work
in fact they put two to 30-45°
these are my experiences
Thank you very much

Yes, shiren, that's true, too.
but the standard commercial gearbox cable shaft has a single "passer" cut per key so you are obliged to use that, possibly of the entire length. when they are very long that I no longer find them "finished" by trade I take that in 2mt bar, cut to size and roll the ends.
many, even "important" companies, put the two tabs online at the beginning and end of the hollow shaft, justifying that being the cable downloaded inside the single tab would not work in the central part.

greetings
Mar

 

[stefanobruno]

He wouldn't work in the middle.

greetings
Mar

It is not true that it would not work in the central part, the sides of the quarry are still there and are not downloaded.
the central part of the hole is discharged to facilitate the insertion and parade of the tree.
returning to the proposed application, I would still point out that, in addition to looking at how and where to put the various mechanical parts, in absolute the swing that is between the exit plan from the reducer and the two gears is excessive.
the radial loads applicable on the shaft are indicated on the gearbox catalogues, it will be better to take a look before proceeding further.
Fortunately I have never met "important" companies that practice these techniques.

(I see that there are people who are late in the disco:biggrin: )

Bye.

 

[stefanobruno]

you try to build a "millerighi"

requested by the customer only once (since 1989).
The others, if I try to propose it, they'll kill me, everyone.
on the market the gearboxes with grooved hollow shaft are but only optional and do not add anything to the quality of the transmission of the motorcycle.
in front of frequent inversions of the direction of rotation, much better to use hollow shafts with calettatore.

Bye.

 

[sampom]

in fact,
I simply referred to what I see and feel around;
as I have said it, unique tongue in full length. certainly on very long cuts eye to the milling on the tree that must respect tolerance of linearity perfectly on the generator.

It is not true that it would not work in the central part, the sides of the quarry are still there and are not downloaded.
the central part of the hole is discharged to facilitate the insertion and parade of the tree.

Yes,
However, being in that section the larger hole also the "horse's fiancles" are "reinforced" (the hollow edges of tree and hole are no longer coincident) and if there were not the "support" of the incoming and exit sections in the tab would generate a "turning motion" (as we know the tabs work to cut, no?), as when they have little precise couplings and tabs that we know.
for the rest in the general application I fully share your considerations; away immediately that seeger that acts as a "push" and if possible put the tree in line (even with spacers, but then that higher gear blocked only by a grain would not go well); screw and washer in the head to lock everything (if necessary, but as you have well seen it is not always required, indeed.. if the axial load is only and always directed in the "support sense" or even canceled by a upstream brace, it is useless. in this regard in the presence of important axial reactions always eye to the specifications of the reducer. )

returning to the proposed application, I would still point out that, in addition to looking at how and where to put the various mechanical parts, in absolute the swing that is between the exit plan from the reducer and the two gears is excessive.
the radial loads applicable on the shaft are indicated on the gearbox catalogues, it will be better to take a look before proceeding further.

- That's right.
from how the friend proposed it perhaps all the scheme should be revised.

Fortunately I have never met "important" companies that practice these techniques.

I repeat that they are not my beliefs but simply what is located around (and as you see here also happens to see and discure solutions not properly to the "state of art" :biggrin

(I see that there are people who are late in the disco:biggrin: )

Maybe.
at my age the disco is on the sofa ronfando:biggrin:. However, being a night of nature between a pennica and the other, I stretch my legs a little bit and I pass here to make me a cigarette "in company".

greetings
Marco:smile:

 

[sampom]

in front of frequent inversions of the direction of rotation, much better to use hollow shafts with calettatore.

Bye.

perfect, quoto.
the best solution.

greetings
Mar

 

[omegaquadroerre]

(Language=work side as the tongue does with food in the mouth stick works on the back as the key in the patch does) eh eh eh

the reducer can bring two tabs
because it is reversible (you can leave both sides).
and in your case leave only the b because closer to the load.

If you want to put two because you don't trust or make the tree in fe360, then put a long one, because two separate people never work together

The seeger creates carving, come on.... kills how many mistakes
and then you just need a couple of spacers between wheel-rid and wheel-support and the tree is still!
spacers also increase the flexional stiffness of the tree

greetings

 

[sampom]

(Language=work side as the tongue does with food in the mouth stick works on the back as the key in the patch does) eh eh eh

the reducer can bring two tabs
because it is reversible (you can leave both sides).
and in your case leave only the b because closer to the load.

If you want to put two because you don't trust or make the tree in fe360, then put a long one, because two separate people never work together

The seeger creates carving, come on.... kills how many mistakes
and then you just need a couple of spacers between wheel-rid and wheel-support and the tree is still!
spacers also increase the flexional stiffness of the tree

greetings

..well, it is not that you can say so to light heart "put only one on the side b biggrinHow long? and what couple do I have to transmit? what will that little tongue stand for?
I'm the one with a lot of misunderstandings, since the reducer has the cutting edge, I prefer to put one in full length so that I can exploit all the potential of the reducer.

greetings
Mar

 

[cacciatorino]

I'm the one with a lot of misunderstandings, since the reducer has the cutting edge, I prefer to put one in full length so that I can exploit all the potential of the reducer.

greetings
Mar

And then the more the tongue is long and more by force of what will be stunned, so bison will mount the hammered aberrant that will then be absolutely blocked, so here is the reliability of the calettator at the cost of a tab (and some father of the editor obviously). :biggrin:

 

[thor105]

personally (but it would always be better to get away from calculations) I would avoid putting the tab in the position a, since in that area there is also a hole and realize also the quarry for the tongue we would go to remove still material to the section in which the torque moment would be applied and imagine what kind of tension intensifying there would be in that area, which would also mean less fatigue duration of the tree.

 

[stefanobruno]

...I would like to put the tab in position a, since in that area there is also already a hole and realize also the quarry for the tongue we would go again to remove material to the section where the torque would be applied. . .

I didn't mean to say that:

I think we're getting rough.

the mounting indications that are found on all the catalogs of the gear motors with so much rules for the holes in the head of the trees someone looks at them?

Good night to those who stayed.