size rack

[Gio_RS]

Hello, I have to make a coupling between a helical toothbrush and a straight teethed toothbrush on a cylinder (back mechanism of a servosterzo that I have been studying for months).I have tried to use the gear mating command but nn I can realize it to solid works, according to you is okay this road or do I have to resort to other solutions? ? ?


I attach two images to give you an idea of mating....

 

[sampom]

Hello, I have to make a coupling between a helical toothbrush and a straight teethed toothbrush on a cylinder (back mechanism of a servosterzo that I have been studying for months).I have tried to use the gear mating command but nn I can realize it to solid works, according to you is okay this road or do I have to resort to other solutions? ? ?


I attach two images to give you an idea of mating....

Hello,
I have some doubt about the kind of realization you have adopted.
I don't understand on "any part of the cylinder" you got the teether (so to the eye it seems to me placed on a ring, a circular crown with the convex face.. bho?).
Maybe a couple would be better cream cheese rather than theignaggio. but I don't know, I should see the file; Could you post the natives so maybe we can help you?

greetings
Mar

 

[Gio_RS]

you're right from the pictures you don't understand...... I was wrong to write I meant pairing racks not gears......:tongue:
I attach the two pieces......

the helical toothing is realized by building me the curve on excell, taking some measures from the real piece, for the rack instead I have problems because nn I own the real piece so I can not detect measures, moreover I do not know even the sizing of a rack known the data of the pinion ....magari here is someone who knows how to make it... .
Let's say that my rack is a bit approximate. . .

use solid works 2009 sp0....

 

[Gio_RS]

hi,I would have to realize a pinion-cremagliera coupling in which the pinion has a helical toothing and the rack has a teeth teeth teeth teething (retrotation mechanism of an oleodynamic servosterzo). I made the sizing, correct weight, of the helical toothing: module, angle of the propeller, I pass..... now though I wanted to know how to dimension the rack....just that between the two there is the same module to realize the coupling?? or are other conditions necessary? ?

I add pictures.... .

 

[sampom]

hi,I would have to realize a pinion-cremagliera coupling in which the pinion has a helical toothing and the rack has a teeth teeth teeth teething (retrotation mechanism of an oleodynamic servosterzo). I made the sizing, correct weight, of the helical toothing: module, angle of the propeller, I pass..... now though I wanted to know how to dimension the rack....just that between the two there is the same module to realize the coupling?? or are other conditions necessary? ?

I add pictures.... .

Come on.
practically the same post in two sections (before you were in solidworks), comes out such a mess, and then :mixed:. :biggrin:
bear patience that the answers/solutions will come; Just decide "where to stay."

greetings
Marco:smile:

 

[Gio_RS]

:biggrin:....ok ok :finger: .... and only that I am going crazy: eek:..... I have to find a solution......it is all weekend I try......

I'm new, I've just signed up. I still have to take my hand....:wink:

Hi. .

 

[sampom]

I'm new, I've just signed up. I still have to take my hand....

Hi. .

Here.
very useful in this case is to read the regulation before taking any action:mixed: :tongue::

greetings
Marco:smile:

 

[AlbertoC]

Hello,I would have to make a pinion-cremagliera coupling where the pinion has a helical toothing e la rack has teeth teeth teeth teething rights (retrotation mechanism of an oleodynamic servosterzo). I made the sizing, correct weight, of the helical toothing: module, angle of the propeller, I pass..... now though I wanted to know how to dimension the rack....just that between the two there is the same module to realize the coupling?? or are other conditions necessary? ?

I add pictures.... .

They can't gear.

 

[sampom]

you're right from the pictures you don't understand...... I was wrong to write I meant pairing racks not gears......:tongue:
I attach the two pieces......

the helical toothing is realized by building me the curve on excell, taking some measures from the real piece, for the rack instead I have problems because nn I own the real piece so I can not detect measures, moreover I do not know even the sizing of a rack known the data of the pinion ....magari here is someone who knows how to make it... .
Let's say that my rack is a bit approximate. . .

use solid works 2009 sp0....

Are you sure they told you to do it with a straight teeth rack?
because as they answered you in the other post (.. you made a mess as I told you:bekle::biggrin as well as are the two teeth cannot gear.

to dimension a rack you will clearly use the same form of the toothed wheel to which it mates. only that reported on the development plan of the dented bar will become a step, which revenues from the primitive circumference of the wheel with that module divided the nr. of teeth (or principles in your case). to each lap of the pinion will correspond a shift of the rack equal to the primitive circumference (it is equal to a pair of gears of which one "is set up"), and this data you will use to define the coupling cream cheese.

about running with solidworks I tried your files and I had no problem mating them with the cream cheese; keep burning:View attachment CREMAGLIERA.rar try to move them and follow the procedure in the featur manager.
Is that what you meant?

as I repeat the engraving would not be possible, as you see there is interference because the profiles are incompatible. I did the same to you with your models right at the explanatory level, but it's just a "didactic test" for solidworks. You're gonna have to review the project.
I just stretched the step you gave the rack to make it "absolute" to that of the pinion because it didn't make any sense.

then provide some extra data, what form do you need the pinion and with what angle of propeller? and "the angle of incidence" of the two parts?

greetings
Mar

 

[giging]

uso solid works 2009 sp0....

Haven't you updated with sp? you have the student kit version. . .

 

[Gio_RS]

Yes, the same version of my professor, so we can exchange jobs... .


for sampom and other interested I attach the data of the helical toothing, helical teeth sheet.

 

[Gio_RS]

Perhaps I begin to believe that I have wrong cannot really realize the coupling as different of you have supported, although I thought that with a rack of reduced width and an adequate inclination of the same, compared to the pinion, the thing was feasible. :confused
which other type of toothing must have the rack to obtain a correct ingrace?? in these steering systems,with helical spool,what rack could I use? ?

Thank you.

 

[sampom]

Perhaps I begin to believe that I have wrong cannot really make the coupling

Meanwhile take a look at this:View attachment CALCOLO INGRANAGGI ELICOIDALI -1910-.pdf (the first part is clearly interested in us. .:smile
It is "old robe" but always valid.

greetings
Mar

 

[Gio_RS]

looking carefully at the file found at the beginning I saw that the profile of the teeth of the rack is not exactly right teeth, as you can see from the attachment....but it follows a different profile, more complicated. . .

 

[gerod]

eye to double discussions (even if you could split I preferred to join them to have a continuous logical speech).

It gives me the idea that the crematorium with the vsf is critical.
I have dmensed and seen do vsf (reducers). Basically, it's like I develop the crown on the floor, and I know you don't get straight teeth.
If you make them straight, you get into the first ingration.
Hi.

 

[Gio_RS]

you....discussed an hour for the double discussion, I continue the research and maybe I verify the thing on the mechanism of another servosterzo in which I have rack and helical pinion (both the real pieces).....if you have any other news let me know:finger:

 

[Gio_RS]

I attach the photo of a lazy helical mechanism rack (not of the servosterzo that I am studying) and it seems to understand that the teeth is straight but likely inclined to the angle of inclination of the propeller of the pinion....you want what do you think? ?

 

[Gio_RS]

new attempt.... a little more realistic than the previous...rolleyes:

 

[Gio_RS]

sorry my error,the correct file is this:

 

[gregario]

I interfere, only in the discussion (I can't see the files generated with sw...).

a pair of gears, even in your case are a rack is a toothed wheel of infinite radius, must correspond with module, and inclination of the propeller to gear.
You can't make a helical toothing sprocket with a straight teeth rack. . .

if the pinion has the propeller dx the rack must have the propeller sx and vice versa. . .

otherwise both must have the angle of the propeller 0°, then straight teeth, but it is not your case.