Internal bevel gears

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Internal bevel gears

Jesse Guardiani
Reading gears and gear cutting by Ivan Law, on page 41, he talks about the theoretical possibility of internal bevel gears.

"In theory it is possible to have internal bevel gears, that is, where the outside of the cone surface of the pinion will roll in contact with the internal surface of a larger wheel."

He goes on to say that we can't make them with modern cutting techniques. I *think* I know what he's talking about, but I'm having trouble visualizing it. He gives no illustrations, and a quick google search yielded no images.

I wonder if these could be designed in OpenSCAD and 3d printed?

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Jesse
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Re: Internal bevel gears

Jesse Guardiani
No, wait, there is an illustration. See attached.


On Jun 29, 2013, at 10:35 PM, Jesse Guardiani <[hidden email]> wrote:

> Reading gears and gear cutting by Ivan Law, on page 41, he talks about the theoretical possibility of internal bevel gears.
>
> "In theory it is possible to have internal bevel gears, that is, where the outside of the cone surface of the pinion will roll in contact with the internal surface of a larger wheel."
>
> He goes on to say that we can't make them with modern cutting techniques. I *think* I know what he's talking about, but I'm having trouble visualizing it. He gives no illustrations, and a quick google search yielded no images.
>
> I wonder if these could be designed in OpenSCAD and 3d printed?
>
> --
> Jesse

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Re: Internal bevel gears

David Powell
In reply to this post by Jesse Guardiani
cant see why not ,, the book is looking at it from a machining point of view  ,where there would be problems, has he had stated there

 for 3d printing there is not the same machining restriction 

 there is a bevel gear script in the mcad libs already, but if it can manage that angle or not i don't know, i expect it could be hacked to do so
 
by the same token he does not cover the outer ring gears of a planetery gear set that also have teeth on the inside edge and the same machining problems 

  


On Sun, Jun 30, 2013 at 3:35 AM, Jesse Guardiani <[hidden email]> wrote:
Reading gears and gear cutting by Ivan Law, on page 41, he talks about the theoretical possibility of internal bevel gears.

"In theory it is possible to have internal bevel gears, that is, where the outside of the cone surface of the pinion will roll in contact with the internal surface of a larger wheel."

He goes on to say that we can't make them with modern cutting techniques. I *think* I know what he's talking about, but I'm having trouble visualizing it. He gives no illustrations, and a quick google search yielded no images.

I wonder if these could be designed in OpenSCAD and 3d printed?

--
Jesse
_______________________________________________
OpenSCAD mailing list
[hidden email]
http://rocklinux.net/mailman/listinfo/openscad
http://openscad.org - https://flattr.com/thing/121566


_______________________________________________
OpenSCAD mailing list
[hidden email]
http://rocklinux.net/mailman/listinfo/openscad
http://openscad.org - https://flattr.com/thing/121566