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mechanism-gear

  • Thread starter Thread starter davideingSp
  • Start date Start date

davideingSp

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Hello, everyone.
I'm working on a university project with pro/e.

I would need your help because unfortunately in lesson we did not see how to use this section of the program and so now I am a bit in trouble.

I need to create a "gear" link between these 2 toothed wheels.1.webp2.webp3.webp4.webpas you see the wheels are bound one on the engine tree (the green one) and the other on a tree that has to move.

My problem is that I can't "align the teeth so that these are tangent during rotation and at the same time make sure that the holes of the toothed wheels coincide with the axes of the respective holes for locking through thorns (for the red one) and locking through screw (for the yellow).

I would have managed to get a gross solution by moving the dentate wheels with the "manina" so that when I create the gear the teeth of the wheels are tangent to the sight but the problem is that when I go to analyze the global interference I report a superimposition albeit very small and I would like to solve this problem.

the toothed wheels have for
-red----- primitive diameter 35mm --35 teeth --- form=1
-yellow---- primitive diameter 16mm --16 teeth ---module =1
the pressure angle is 20°
I don't think there's any problem with the raid.

Can you tell me how to proceed? are really in crisis:frown:
 
Hi.

I usually do this...
analyze the attached example and then if it is not clear we will talk about it, otherwise, explain it in words becomes long and difficult.
it would be better to have the gears as high as possible in the model tree and to mate the other pieces to them in order to make them better.
 

Attachments

DANI-3D said:
Hi.

I usually do this...
analyze the attached example and then if it is not clear we will talk about it, otherwise, explain it in words becomes long and difficult.
it would be better to have the gears as high as possible in the model tree and to mate the other pieces to them in order to make them better.
Click to expand...
Hello, you were very kind to answer me, thank you.

I looked at the toothed wheel in your example and saw that there is a visible primitive diameter and then you put a point and a passing plan for that point, so doing in theory I could really align the teeth of the gears as best I think, the problem is that I always have a very small interference!interferenza.webpAt this point I begin to believe that there is some problem in the construction of the wheels, even if I don't believe because they are models that have been given to us in class, for scruple I attach them so if you want you could verify yourself


correct me if I am wrong, to create the "gear" I should bind the wheels so that they are in phase as I want and then remove these constraints except those necessary to their positioning of the trees, right?
I'm asking you because I've seen that by completely binding the wheels then if I go to move them they get stuck.

excuse me for questions from beginner but I am trying to learn more:biggrin:
 

Attachments

davideingSp said:
correct me if I am wrong, to create the "gear" I should bind the wheels so that they are in phase as I want and then remove these constraints except those necessary to their positioning of the trees, right?
I'm asking you because I've seen that by completely binding the wheels then if I go to move them they get stuck.
Click to expand...
That's right. there are deactivated planarity constraints to allow movement, which serve to make the gears.

for the problem of interference, the tooth profile must be a perfect evolving, to have a positive result. those I use are schematics to save memory so much they just have to make the idea.
 
DANI-3D said:
That's right. there are deactivated planarity constraints to allow movement, which serve to make the gears.

for the problem of interference, the tooth profile must be a perfect evolving, to have a positive result. those I use are schematics to save memory so much they just have to make the idea.
Click to expand...
ok then let's say that the basic idea I have more or less happens.
- the primitive circumference that I see in your wheel use to give the tangency bond with the other wheel?

Does everything look okay?
I almost try to create a toothed wheel starting from scratch, only that Thursday I need to show where the job is and I don't want to get along with the times..
 
I also noticed that when I go to assemble the two wheels only one makes me select the primitive circumference as a reference, then expect an axial bond, the primitive of the other wheel is not selectable
 
davideingSp said:
- the primitive circumference that I see in your wheel use to give the tangency bond with the other wheel?
Click to expand...
No, I just need visual representation and drw. the interasse of the two wheels is managed in the relations, where the two primitive rays high.
davideingSp said:
Does everything look okay?
Click to expand...
Yes, they are well done, however, as I imagined, the contact surface and formed by 2 arches and not by an evolving.
 
DANI-3D said:
No, I just need visual representation and drw. the interasse of the two wheels is managed in the relations, where the two primitive rays high.



Yes, they are well done, however, as I imagined, the contact surface and formed by 2 arches and not by an evolving.
Click to expand...
aia... then here is the mystery revealed... At this point I think I'll have to create the wheels starting from scratch.
I'm going to work and try again.
 
and with this are 1000 messages!!!!:rolleyes::rolleyes:

davideingSp said:
aia... then here is the mystery revealed... At this point I think I'll have to create the wheels starting from scratch.
I'm going to work and try again.
Click to expand...
Go ahead, it's a great way to learn. but if you do this for the speech of the interferences I don't think you will solve the problem, that I know there is no function that creates an evolving, so even if you increase the number of segments to have a better resolution, you will always have to use bows.
 
DANI-3D said:
and with this are 1000 messages!!!!:rolleyes::rolleyes:




Go ahead, it's a great way to learn. but if you do this for the speech of the interferences I don't think you will solve the problem, that I know there is no function that creates an evolving, so even if you increase the number of segments to have a better resolution, you will always have to use bows.
Click to expand...
today I was all afternoon trying to combine something, following some videos on youtube I managed to create a wheel with an evolving profile through the "curva con equazione" command

the biggest problem is that I don't know how to make the wheel parametric, I would like to change the value of the tooth number and the primitive diameter the wheel was updated but it doesn't happen.
I think I will first build the other wheels step by step as I did with this. .

How does that sound?

p.s compliments for the 1000 posts!:wink:
 

Attachments

Good morning.

to parameterize the wheel I recommend you set the relationships according to the module m and the number of teeth z, and go to calculate all the necessary parameters. you can take for example the gear I have attached in the previous example.
the wheelparametric that you have made is very likely and is easily parametizable only when changing the number of teeth, if you change the module update the "curva con equazione" automatically I see it hard. for this it usually represents in a schematic way.
 
DANI-3D said:
Good morning.

to parameterize the wheel I recommend you set the relationships according to the module m and the number of teeth z, and go to calculate all the necessary parameters. you can take for example the gear I have attached in the previous example.
the wheelparametric that you have made is very likely and is easily parametizable only when changing the number of teeth, if you change the module update the "curva con equazione" automatically I see it hard. for this it usually represents in a schematic way.
Click to expand...
Good morning.
the speech is that I need to create 4 dentate wheels all with module=1
I was looking for a way to shorten the times but also trying to change the heat of the number of teeth I do not solve anything, I put myself to make the other 3 wheels and then try to set the gear:)
 
I tried to do as you say but I think I will keep it as exercise to do next, for now I have created the 4 wheels dentate one by one, I used the parametric equation to create the profile of the teeth to evolve and everything seems ok except one thing:

If I go to assemble two wheels the teeth are too high and sink into the wheel body, I attach the file so you can see yourself.
to size the wheels I followed an internet guide, for example for the primitive diameter of 22mm I took:

-diameter basic circumference: 22*cos(20)= 20.673
-addendum=1/module=1
-external diameter= primitive diameter+2(addendum)=22+2*1=24
- height dente= 2.157/module=2.157
- dente height - addendum=1.157
-root diameter= primitive diameter-(2*dedendum)
then I held the corner occupied by every tooth doing 360/z

Are these references correct?
 

Attachments

At this moment I can't help you, I'm hurt, however, I repeat, if you go to the gear reports that you or post there are all the formulas to get all the data.
 
calacc said:
hi davide, sorry if I interfere but doing a search in qs section of the forum there are already beautiful wheels that parameterized that I used also in the past for some projects.
Here are the links: http://www.cad3d.it/forum1/threads/252-ruote-dentate?highlight=ruote+dentateHello, a good evening
Click to expand...
Hey, come on, no trouble, indeed! :
Unfortunately in that model does not vary the primitive diameter, I need to create wheels with different diameters
- - - updated - - - -
DANI-3D said:
At this moment I can't help you, I'm hurt, however, I repeat, if you go to the gear reports that you or post there are all the formulas to get all the data.
Click to expand...
I have seen, there are so many parameters, now I try to shake a little and see where I am wrong
 
I remember because it's been a while since I used them... for the primitive diameter I think it is enough to change the initial sketch. What wheel are you using?
 
calacc said:
I remember because it's been a while since I used them... for the primitive diameter I think it is enough to change the initial sketch. What wheel are you using?
Click to expand...
I have to make straight teeth wheels.
I attach the image of one of those I have to createruota.webp
 
Okay, I don't understand what the problem is. Can't do that? What exactly can't you do? I don't know.
 

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