Dual Mode Windup Car

cults3d

If you've been following my previous PLA Spring Motor Rolling Chassis designs (here: http://www.thingiverse.com/thing:2025760, here: http://www.thingiverse.com/thing:2011107, and here: http://www.thingiverse.com/thing:430050), you'll have noticed they're all "open frame", primarily because I enjoy watching gears in motion, secondarily weight reduction. Dual Mode Windup Car is my first attempt at a "rolling body" design, but I left the windows down so I can still watch the gears. Check out this thing for a description of why I call it "dual mode": http://www.thingiverse.com/thing:2025760. This design represents a significant weight increase over previous designs, and to compensate I increased the final drive gear ratio from 1/25 to 1/16 to boost torque. As such, I also strengthened the axles and gears to handle the increased torque. After testing, this vehicle easily traveled around 40 feet on smooth surfaces. The wheels and body top shown in the photographs are designed for a dual extrusion printer; however, I have included single extrusion versions of all necessary parts. The first image is of the prototype, the second is the output of the design from Fusion 360, and the final is an orthographic view of the bottom of the design from Fusion 360. Watch this video of the prototype in action: https://www.youtube.com/watch?v=7nEYIH4mcjE. You'll need to purchase 16 "AS 568" size 222 (1 3/4 O.D., 1 1/2 I.D., 1/8" diameter) o-rings for the tires. I probably forgot a file or two, so if you have any questions, please don't hesitate to ask. Designed using Fusion 360, sliced with Cura 2.3.1, and printed on an Ultimaker 3 Extended in PLA.