Golden Ratio Seahorse Gears

Author: JamesWhite, published on 2014-02-25

Click this button to get the 3D model

Summary

Golden Ratio Seahorse Gears.
Animated GIF: http://i.imgur.com/9HVIzAV.gif
Inspired by Nautilus Gears by MishaT:
http://www.thingiverse.com/thing:27233
Update 9/8/14:
I added a new smooth running seahorse gear version (v3). The new version does not latch into a closed position and is suitable to drive
with a motor, etc.
To clarify, choose the version of the gear based on desired action.
Gear v2 – Latching
Gear v3 – Smooth running
Enjoy!
Update 6/9/14:
Added DXF files, so hopefully people with laser cutters can try this out too.
Update: 2/27/14:
New Version (2.1) of the arm. I replaced the pins with simple holes. Use raw 1.75mm filament for the pins/rivets, using the methods described here for using rivets as hinges. Look at the section titled ‘USING FILAMENT TO MAKE SOLID RIVETS AND HINGES’ towards the end of the article :
http://makezine.com/projects/make-34/skill-builder-finishing-and-post-processing-your-3d-printed-objects/
I used a lighter instead of a heat gun. It’s quite easy and much stronger than a printed pin.
Update 2/26/14:
New Version with stronger pins…. is a failure. Pins do not mate properly. I have a new vetted design with a simpler pin made from a raw filament ‘rivet’. I’ll post updated files and instructions on 2/27/14
Update 2/26/14: New Version with (hopefully) stronger pins.
Units are now in Metric.

Instructions

Print two identical gears and one Left & Right side arm.
For a nice texture use ‘Hilbert Curve’ for the first and last layer of the seahorse gears.
Use raw 1.75mm filament for the pins/rivets, using the methods described here for using rivets as hinges. Look at the section titled ‘USING FILAMENT TO MAKE SOLID RIVETS AND HINGES’ towards the end of the article : http://makezine.com/projects/make-34/skill-builder-finishing-and-post-processing-your-3d-printed-objects/
I used a lighter instead of a heat gun. It’s quite easy and much stronger than a printed pin.
Note:
The ‘assembled’ file is not set up to print in place. It is for visual reference only.

License: Creative Commons – Attribution – Share Alike

Tags: Gears, Golden_Number, Golden_Ratio, mathematical_art, Non_Circular_Gears, Seahorse