assembly shaft

[Gabriele17]

a question: for the choice of components should I rely on the tree? If yes, the size of the tree I choose them or do there exist more common sizes than others? I apologize for the stupid question but I haven't been given any indications about it.

 

[meccanicamg]

a question: for the choice of components should I rely on the tree? If yes, the size of the tree I choose them or do there exist more common sizes than others? I apologize for the stupid question but I haven't been given any indications about it.

the real dimensions in your case are given by:
- real sizing forces agents, stresses, von mises....
- diameters dictated by existing commercial bearings
- Existing end-step wreaths
- standards for gorges and standard elements
- common sense

 

[Gabriele17]

I leave here the installation slightly modified with small devices. (the pulley will be stuck with screw and rosette), let me know if it is correct, if you want

 

[MassiVonWeizen]

Sometimes it seems that nothing is read about.
the drawing, except for the gorges that can be indicated and defined in the drafting phase of the details, are practically identical to before. the two spacers on the right do not serve because you do not have a condition to record a sum of tolerances, or to compensate for a vacuum given by the surrounding geometry; In fact the flange can be put in a joke on the shouldermemto on the left that obviously should be stretched and the rosettes (always 2) can lean directly on the flange.
the only spacer that could make sense is that between bearing and flying even if I would never do that light on the hub and then I would support the bearing directly on the shoulder

 

[meccanicamg]

Sometimes it seems that nothing is read about.
the drawing, except for the gorges that can be indicated and defined in the drafting phase of the details, are practically identical to before. the two spacers on the right do not serve because you do not have a condition to record a sum of tolerances, or to compensate for a vacuum given by the surrounding geometry; In fact the flange can be put in a joke on the shouldermemto on the left that obviously should be stretched and the rosettes (always 2) can lean directly on the flange.
the only spacer that could make sense is that between bearing and flying even if I would never do that light on the hub and then I would support the bearing directly on the shoulder

the spacers on the right can leave them. it could be that the groove is done long and then for some reason you want to record it in a position to interasses managed to mount between trapezoid belt and flange.

 

[MassiVonWeizen]

certainly not the one between wreaths and flanges

 

[meccanicamg]

certainly not the one between wreaths and flanges

to me in the workshop have complained so many times that there is no space that you say to eliminate. of itself does not serve anything though if it is smaller outer diameter than the wreath allows to act on a small diameter. If instead the object placed in contact with the wreath has a very large diameter you find that you struggle to insert the hanger key to beat.... because hammers on the wall....instead with the distantial beats in half the width of the mazzuolo.

 

[Gabriele17]

I have made further changes, I have removed the space between bearing and flying by putting a new shouldering, so that the bearing is supported directly, same thing on the left side. Is it right then to rectify the surfaces for forced coupling? therefore the area on which the flywheel is mounted and bearing seats.

 

[MassiVonWeizen]

for both grinding cases. especially in case of forced mounting.
the design is disproportionate. I hope that after defining the assembly, which now seems appropriate, despite my conviction of the space between the wreath and flange, you will also cure this aspect.

if instead the object placed in contact with the wreath has a very large diameter you find it hard to insert the hanger key to beat

it could also be, but in this case you would screw the first hand wrench and lock it by maneuvering the hanger key always manually and you would peek with the bat on the second so the problem of the key would not exist

 

[MassiVonWeizen]

surely you are not required calculations to size the axieme, but hypothesized a size of the central hub you can for approximation make a sizing of the commercial organs: bearings (seeger comes as a result to these), the pulley can take it straight hole that you will then work conical, the flange the do what size you want (just not its use) but thinking not to make the hole too smaller than that of the bearing you will be able to define the diameter of the wreath.

 

[Gabriele17]

ok thank you, you in fact did not ask me the calculation, I am proceeding by approximation

 

[Gabriele17]

I have made further changes, I have removed the space between bearing and flying by putting a new shouldering, so that the bearing is supported directly, same thing on the left side. Is it right then to rectify the surfaces for forced coupling? therefore the area on which the flywheel is mounted and bearing seats.View attachment 57910

Should the grooved part of the tree be rectified?

 

[meccanicamg]

Should the grooved part of the tree be rectified?

if you find the legislation you will see what is milled and faces are in coupling.

 

[MassiVonWeizen]

http://dismac.dii.unipg.it/common_files/disegno/_12_collegamentialberomozzo.pdf

 

[Cadinpiedi]

Good evening,
known that this exercise does not require the design of bearing supports,
Why is it prophesiedeutic?
completion with the media would change the cards in play.However it makes species see sketches with microbial dimensions of the bearings.
as the eye wants its part I suggest the use of a "scad",
scalemeter aided design... :
They sell them again, they cost little and do not consume!

 

[MassiVonWeizen]

not knowing the use of the assembly where it goes mounted you could construct anything. the user must create an assembly according to the initial scheme that does not provide supports.
it also has a lot of confusion and very little experience, adding supports (totally hypothetical) would increase confusion. must also make the constructive tables....
to do something proportionate just a elementary school ruler or a millimetered team to be lazy

 

[Cadinpiedi]

not knowing the use of the assembly where it goes mounted you could construct anything. the user must create an assembly according to the initial scheme that does not provide supports.
it also has a lot of confusion and very little experience, adding supports (totally hypothetical) would increase confusion. must also make the constructive tables....

<lo supponevo!=""> :

to do something proportionate just a elementary school ruler or a millimetered team to be lazy

<esatto!> :
</esatto!></lo>

 

[Gabriele17]

good evening, I attach what should be the final assembly, realized taking all the unified components except the flywheel that the professor said to do to please.
the pulley protrudes from its 1mm seat and has been blocked with a screw m14, with attached normal rosette. I also intend to place the center hole at the end of the threaded cod. What do you think?

 

[MassiVonWeizen]

as drawn the rosette takes too little on the pulley. use broad ones.
the suscinet side shouldermen have to affix only on the inner ring and not beyond otherwise risk to spoil the seals. for maximum size see skf site based on the chosen bearing; see for example This is where it indicates the size of the shoulder.
the tips from centers are mandatory when making details that are then to be rectified; side pulley could even make hole from threaded center.
with all the diameters m14 should you have taken? It's unused. make m12 that to lock the pulley is enough and advances.
do the space between the needle and the smaller flange otherwise it is like not having it because you return to the concept of mechanicmg that creates problems in inserting the Key key to lock the needles, you can do a down so that on the flange use the diameter you have now and on the needle a smaller

 

[Gabriele17]

as drawn the rosette takes too little on the pulley. use broad ones.
the suscinet side shouldermen have to affix only on the inner ring and not beyond otherwise risk to spoil the seals. for maximum size see skf site based on the chosen bearing; see for example This is where it indicates the size of the shoulder.
the tips from centers are mandatory when making details that are then to be rectified; side pulley could even make hole from threaded center.
with all the diameters m14 should you have taken? It's unused. make m12 that to lock the pulley is enough and advances.
do the space between the needle and the smaller flange otherwise it is like not having it because you return to the concept of mechanicmg that creates problems in inserting the Key key to lock the needles, you can do a down so that on the flange use the diameter you have now and on the needle a smaller

thank you very much for the details and for the help