Make: Online : More planetary gear pr0n

More planetary gear pr0n

This morning's planetary-gear motorcycle wheel post has induced an epicyclic fury in my heart that is terrible to behold. Here's a couple of gems from the inevitable YouTube frenzy. The first, above, shows a set of elliptical gears (ho-hum), and then proceeds to show some pretty amazing non-circular planetary trains. The second, below, shows an asymmetric train without a constant center. As Gareth would say: WANT.

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Posted by: Sean on September 1, 2009 at 10:41 AM

Prius Power Split Device

While we're at it, more Planetary Gear Pr0n, or how the Prius couples the power from an engine and two motors. It's a shiftless transmission with everything controlled by the amount and direction of power input.

http://eahart.com/prius/psd/

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Posted by: Sean on September 1, 2009 at 10:46 AM

Where to find background on the mathematics behind non-circular gears?

Does anyone know where one might find info on the mathematics behind non-circular gears? I suspect its not the sort of thing that comes in your standard CAD package.

-S

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Posted by: Carl on September 1, 2009 at 11:11 AM

wow

wow, that is some wild stuff.

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Posted by: anachrocomputer on September 1, 2009 at 12:24 PM

Vectrix Electric Motorcycle

The Vectrix electric motorcycle uses a planetary gear system to drive the rear wheel from the hub-mounted motor. Shame it's all covered up by a chromed and finned casing! My photo of it (on Flickr) is here: http://www.flickr.com/photos/anachrocomputer/1828683727/

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Posted by: Berend on September 1, 2009 at 12:58 PM

Could that gear in the middle of the first also act as a kind of Wankel engine?

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