mechanical design of a reducer

[Mario Gatti]

hello to all, I am a student of mechanical ing and attended polytechnic, I would like a comparison regarding the correct representation in 2d of the components with the regulations of the technical representation of this mechanical assembly. the design represents a reducer of a straw

 

[MassiVonWeizen]

you represented the section of a assembled with its ball of components, what would you like to know? if you used the correct thickness of the lines, if the restraints are properly arranged, if the line type of axles is right?
What does it mean to you with the regulations of technical representation?
you are engineer, the design exam should have passed it and then know how to draw

the forum is full of drawings of gearboxes, wave like the horn in '66.. .

 

[DoctorBomber90]

@mario cats You're too generic. What component do you want to represent?
rather choose some components and then try to draw them on a table.
publish them and then we will try to comment on them.

 

[Mario Gatti]

more than anything else I would like to understand if there are conceptual errors on the bearing arrangement and especially if the representation of the parallel flank groove of the two piece wheels is correctly represented. my question is very generic and I understand it though I might have missed something that maybe in your eyes is obvious

 

[Mario Gatti]

in another way I would like some advice to make the table as precise as possible

 

[Mario Gatti]

you represented the section of a assembled with its ball of components, what would you like to know? if you used the correct thickness of the lines, if the restraints are properly arranged, if the line type of axles is right?
What does it mean to you with the regulations of technical representation?
you are engineer, the design exam should have passed it and then know how to draw

the forum is full of drawings of gearboxes, wave like the horn in '66.. .

I would like to know if there are obvious representation errors, that is, what would you change in the table to make it completely correct?

 

[Mario Gatti]

@mario cats You're too generic. What component do you want to represent?
rather choose some components and then try to draw them on a table.
publish them and then we will try to comment

I did all the sizes and checked them with the software so the result you see was created by 0, giving a general look known of the components that are not in norm or that were placed badly?

 

[meccanicamg]

hello to all, I am a student of mechanical ing and attended polytechnic, I would like a comparison regarding the correct representation in 2d of the components with the regulations of the technical representation of this mechanical assembly. the design represents a reducer of a straw

I feel good.
But I don't understand why bearing 16 flies there alone.

Moreover the 36 that should be an exhaust stopper call it nut that instead 3 a screw. write din 913 but the norm represents a threaded grain. there are denomination/representations that are not related.

 

[MassiVonWeizen]

more than anything else I would like to understand if there are conceptual errors on the bearing arrangement and especially if the representation of the parallel flank groove of the two piece wheels is correctly represented.

and daje with 'sta 'ruota di piece'... does not mean anything!!! for that representation you just see any book like the vademecum baldassini.
If you ask if the provision is correct, the regulations have nothing to do with it, but it is a purely technological question.

in another way I would like some advice to make the table as precise as possible

depends on the purpose of the table:
if it is a basic engineering for a study is far too detailed; you have lost time to represent bevels and rays that will be the task of those who will make the extraction and technical drawings of the details.
if it is an assembly design for the workshop lack information for assembly.
if it is a university exam you are a student and not an engineer

I would like to know if there are obvious representation errors, that is, what would you change in the table to make it completely correct?

see the answer above.
there are conceptual errors and technological errors or criticalities; just a couple:
-The distinct ones do not fill in that way, each component must be on a row and not make rows of double components, in fact there is a crazy casino (see n°35 and 36 for example)
-all lines are of equal thickness

I feel good.
But I don't understand why bearing 16 flies there alone.

Moreover the 36 that should be an exhaust stopper call it nut that instead 3 a screw. write din 913 but the norm represents a threaded grain. there are denomination/representations that are not related.

In fact, the distinct is a mess. what you see is a grain, a rosette and a nut like the one represented on the upper part close to the flange with 35; in practice on one side it has swamped grain and rosette with 35 (which brings both components) on the other the only nut with 36 (bearing to write the description) assuming that being graphically equal it is obvious that the pallination is valid for both.

the more I look at the drawing the more I see errors

 

[meccanicamg]

what you students call piece wheel probably refers to the toothed tree.
what I do not like about the representation of the creator fund made at 45°.

the representation used is only for the grooves, but also here I would say that being made with circular milling can not be a 45° discharge.@terastore long ago he had posted this beautiful design, which I printed and put in the office because I really like it.with the passing of time, you are abandoning a little representation according to regulations and also cads show more the real profile.
for some things are more clear, but for others not.

 

[Mario Gatti]

Thank you very much

 

[TETRASTORE]

I attach my considerations to the anomaly found in the design field.

 

[DoctorBomber90]

However, there is to say that, to be a student showing his work (with so much of verification and dimensioning) you are doing a good job. There are some things to put in place but you are on the good road.
Something on the ball.the things that have said @massivonweizen ,@meccanicamg e @terastore are more important than this part I'm correcting you. Either way, from my point of view, you could put the balls in place (look at the comments I left you).
other thing, if you can space the bubble layout from the sections (so to make even more clear the understanding of who reads your design.

 

[DoctorBomber90]

Instead, I can't understand the geometry of the toothed wheel 13.
as the "race" has been realized (by race I mean the intermediate part between the hub and the crown of teeth).I mean, I can't figure out what these circles are. @mario cats Can you tell me?

 

[MassiVonWeizen]

However, there is to say that, to be a student

really is an engineer

-no one has noticed that all the holes passing are equal to the diameter of the screws
-wheel 13 supports shaft 5 for radius size
- bearing 20 supports on wheel 10 for a thick spit
-the wheel 10 supports the shaft 12 directly on the teeth and does not seem ideal
- The uni6592 have no head so low
-the screw 37 has diagonal lines that are used to represent an interruption of the element that in this case is obviously not
- the ball as already said is to be reviewed completely
- the nail 31 and rosette 33 of the tree 8 as drawings do not work so that the thread on the tree is missing and the cut for the rosette

these some, but to spray well if they find others

wheel 13 looks like a hybrid between a gear and a mah...

 

[TETRASTORE]

I mean, I can't figure out what these circles are. @mario cats would you make me understand?

mi associo.

-no one has noticed that all the holes passing are equal to the diameter of the screws
-wheel 13 supports shaft 5 for radius size
- bearing 20 supports on wheel 10 for a thick spit
-the wheel 10 supports the shaft 12 directly on the teeth and does not seem ideal
- The uni6592 have no head so low
-the screw 37 has diagonal lines that are used to represent an interruption of the element that in this case is obviously not
- the ball as already said is to be reviewed completely
- the nail 31 and rosette 33 of the tree 8 as drawings do not work so that the thread on the tree is missing and the cut for the rosette

these some, but to spray well if they find others

I agree, but I also think that for the whole part referred to the appearance of pure design, unified elements, design norms, etc. the task of correcting the teacher because otherwise we would find a student who would deliver a correct and inexplicable computer with an assessment that perhaps would not be in line with his actual preparation.
from the mistakes made in general of which many elementary ones, including the persistence of the term "piece spin" despite the terminology that has been given to him, I fear that he will have to apply much more on the subject.

 

[DoctorBomber90]

I still know something in the distinct. you did not ball the carcass and the various lids, with which you will insert the various trees, bearings, wreaths, etc... and you will block everything.
I also noticed something (maybe I'm wrong).
between the carcass and the various lubricants there is no seal/tight so as to avoid the leaks/loss of the lubricant.
not only screws that hold the cover to the carcass, but you have to add a seal. @meccanicamg ,@terastore e @massivonweizen Did I say well or is it a stool?

 

[meccanicamg]

I found another nice mesh reducer where you see all the components.

 

[meccanicamg]

I still know something in the distinct. you did not ball the carcass and the various lids, with which you will insert the various trees, bearings, wreaths, etc... and you will block everything.
I also noticed something (maybe I'm wrong).
between the carcass and the various lubricants there is no seal/tight so as to avoid the leaks/loss of the lubricant.
View attachment 70267View attachment 70268not only screws that hold the cover to the carcass, but you have to add a seal. @meccanicamg ,@terastore e @massivonweizen Did I say well or is it a stool?

for the speech seals, if the reducer is standard you can let cut the seals in paper to put, otherwise enough red paste under the covers.
Alternatively, you can use o-rings between lid and case.

 

[meccanicamg]

I attach my considerations to the anomaly found in the design field.

I'm seeing them with the phone....in fact many details I haven't seen.
The problem is that the boy is using autocad. If he used a 3d cad maybe he'd better understand what he's up to.