tree with wheels

[yudansha]

Good evening to all,
I put a sketch of a tree on which two dense wheels are cast.
there is also a pair of ball bearings, fixed in order to make the shaft in the isostatic complex; or possibility for the first bearing of small axial movements, while the second blocked.

I mainly wanted to know your opinions about possible mounting/disassembly problems in this configuration.

even if there are errors in total let me notice them!

Thank you.
Edoardo

p.s. I hope the annex in pdf goes well, otherwise tell me as well.

 

[Paolo Molniya]

imho:
- the rightmost wheel should rest on the shoulder so put a longer spacer;
- the right lid should be smaller in the sense of putting screws on a smaller diameter circumference to increase stiffness;
- the bearing on the left, could exit the seat with axial loads;
- the two wreaths that hold the bearings need a threaded tract and therefore another small shouldering to be able to extract the bearings, so in order not to change too much the design you could put two segeer rings with relative gorges (if there are not high axial loads).

Hi.

 

[lucrezio]

lacking tabs for dentate wheels;
the right wheel does not support the shouldering (too far away); idem for the left.

I also think the trees have too much to wear than the threaded needles and you may have problems introducing them and screwing them.

 

[MassiVonWeizen]

I try to say mine:
1 even if the wheels are calettate, I have also made couplings r7/h7) we go shouldering to prevent axial shift. unless you use key with hanger.
then on the wheel the bearing of the shaft on the side of the wheel; on the wheel reduce the wheel hole and shoulder on the shaft and stretch it to leave a couple of millimeters of light from the side of the wheel. putting a washer and threading the head of the tree will allow you to make a good locking.
2 in any case you cannot claim to screw a wreath for a similar length; leaves a useful portion for the thread and then lowers the diameter of 1mm (just enough to allow the operator to thread the wreath until the thread is taken.
3 if you need to replace the left bearing you have to disassemble the wheel, which is not always a fast and painless work; Is that position binding? Can't you put the bearing on the extremity of the tree?
of course remember the exhaust gorges for grinding on the shoulders.

 

[SHIREN]

not really na great thing
But better than before,
begins in the changes
then hand you see to get a proper result
Thank you very much

 

[yudansha]

thanks massive,
yes the position of the left bearing is given. further the assembly of the wheels is for interference (as given) then the use of flash drives (to respond a bit to the other users) I believe it is in any case useless.
the fact that the wheels are calettate in fact, I realize move all the problems only on the stage of assembly. a disassembly due to the cast for interference of the wheels would be in any case more than difficult.

Finally, I would like to solve as much as possible all those positioning and assembly problems which could arise in the assembly stage

thanks again to all

 

[stefanobruno]

Have you ever seen how to mount gears in the middle of two plates without tabs (not keystrokes), how do you pull that tree away?

... so in order not to change too much the design you could put two segeer rings with relative gorges (if there are no high axial loads).

better avoid marking the shaft inside the bearings, are not the axial loads to consider but the radial load on the inner gear and the torque between the same and the outer gear, the seeger cut breaks and the shaft breaks, better change the design

If you don't want to use tabs, use the calettators.

 

[Paolo Molniya]

better avoid marking the shaft inside the bearings, are not the axial loads to consider but the radial load on the inner gear and the torque between the same and the outer gear, the seeger cut breaks and the shaft breaks, better change the design

ok thanks

 

[sampom]

...better to change the design

also because it would be completely to remake (forgive me eh yudansha.. :smile. at least respect the dimensional proportions: thick box walls, bearings, covers with screw holes center and diameter enough to bring out the inner wheel, interference ok but the tongue on the torques put the same, shaft tract that carries wheels of increased diameter (just for interference and rectification; Would you like to stick the wheel all over the tree to interference?). . etc. etc. Come on, put down some good wool and do it again.

greetings
Mar

 

[yudansha]

also because it would be completely to remake (forgive me eh yudansha.. :smile. at least respect the dimensional proportions: thick box walls, bearings, covers with screw holes center and diameter enough to bring out the inner wheel, interference ok but the tongue on the torques put the same, shaft tract that carries wheels of increased diameter (just for interference and rectification; Would you like to stick the wheel all over the tree to interference?). . etc. etc. Come on, put down some good wool and do it again.

greetings
Mar

I did the post just to understand the mistakes! :
the proportions of the bearings in fact are not respected, I apologize, but I wanted to make a quick sketch to discuss some possible mounting problems.
For example, what's wrong with you on the lids? ..that the right one has an excessive outer diameter are agreed.

 

[yudansha]

- the two wreaths that hold the bearings need a threaded tract and therefore another small shouldering to be able to extract the bearings, so in order not to change too much the design you could put two segeer rings with relative gorges (if there are not high axial loads).

Hi.

thanks to the paolo answer,
where should this shoulder be put? ..I can't figure out this problem "of bearing extraction" well

 

[SHIREN]

thanks to the paolo answer,
where should this shoulder be put? ..I can't figure out this problem "of bearing extraction" well

Hi.
Good Sunday
are more than 35 years I try to pull linie
I've always been following an old proverb or a saying that runs between drawman
"when you don't get it, you just need to draw"
this to tell you that only by doing - doing-modifying- listening to others-
arrivals to the result
Thank you very much

 

[yudansha]

Good day to all,
I have tried to treasure your advice and I have made some changes (perdominate me the exhaust gorges ). the left part of the tree has a conicacy (I realized that it was another fact of the problem). I did not use keystrokes (though I had agreed with you want it to be easier to disassemble) to adapt to those that were a bit of the premises for my exercise.
I hope therefore that even if not pefect, the whole is more plausible from the point of view of the assembly and the seal.
Thanks again.
Edoardo

 

[lucrezio]

almost good.
now you have only two small problems: the hole on the left (the one of the screw that holds the wheel) must have tip terminal part, as you do it with a drill; then, always left, the shoulder that holds the bearing is too big: it is even higher than the inner ring.
This is a very serious mistake in design, because by rotating the bearing, that shouldering spoils you (i.e. it destroys in a few turns) cages and bearing balls.

You have to lower it a few millimeters.

 

[lucrezio]

The tree, quoted like that, doesn't make much sense.
Also, in the left lid, you have to leave some light between tree and lid.

 

[Paolo Molniya]

where should this shoulder be put? ..I can't figure out this problem "of bearing extraction" well

one thing like that, then I think there are better solutions

 

[Paolo Molniya]

the shoulder that holds the bearing is too big: it is even higher than the inner ring. This is a very serious mistake in design, because by rotating the bearing, that shouldering spoils you (i.e. it destroys in a few turns) cages and bearing balls.

You have to lower it a few millimeters.

Is a bevel all right?

 

[yudansha]

The tree, quoted like that, doesn't make much sense.
Also, in the left lid, you have to leave some light between tree and lid.

Thank you for the answer! I'm sorry.
I immediately correct the shoulder!
the quotation takes only some indications of the exercise, did not want to be exhaustive.
When it comes to the light between the tree and the lid, I thought I put it... maybe too much.