Nautilus gears based on logarithmic spirals.

The generation of gear profiles originates from the research of Dr. Agnes Darby, Dr. Zsigmond Istvan Vallyu, and Dr. Lazik Balint from the Budapest University of Technology and Economics.

Agnes Darby
Budapest University of Technology and Economics

These gear profiles were generated using the following Maple script, and all credit goes to the original author:
http://www.maplesoft.com/applications/view.aspx?SID=95483&view=html&L=G

Rendering animation of the gear:http://www.youtube.com/watch?v=dtkEyZwuwH4

Don't have a 3D printer? You can now buy one on Shapeways.http://shpws.me/Kdit)

I won't upload the SolidWorks file because, to be honest, it contains a variety of experimental attempts. However, I have already uploaded the DXF file, and most CAD software can easily modify it.

Update: I don't have to worry about the rivets breaking anymore!

I have replaced the pins with a simple push-fit structure. All you need to do is print two connecting rods v2 or bend the connecting rods v2

If the connection is not secure, just add a drop of glue! Please note that these connecting rods are for one-time use. If you want to disassemble them without breaking the pins, it will be quite difficult.

For easy reference, I have still kept the original connecting rod.

Print two gears and two connecting rods.

Put the gear on the connecting rod, make sure the gear is aligned as shown in the picture, then insert the second connecting rod. Enjoy it to the fullest.