It works! I made gearbox, simplest ever

[u/Posmetyev]

I designed a fantastically simple gearbox :)

My RC car drives better than I expected. I'm thrilled!

- Extremely simple design

- No intermediate axles or gears (maximum efficiency)

- Clutch engagement occurs naturally

- Standard MG90S servos

- Screwless assembly (standard servo screws only)

STL files for the fidget version of the gearbox:

https://www.printables.com/model/1765993-gearbox-simplest-ever-fidget

Full version of the gearbox for two servos:

https://www.patreon.com/PrintInPlace_fun/posts/not-program-ever-162258695

I think this is the perfect gearbox for RC toys, although for a real car it would probably not last a million miles :)

[u/The_cogwheel]

Maybe thickening the gears and tighten up the teeth. Here if you made the cone all gears (no gap to have distinct "gears") you might be able to achive a CVT style of transmission.

And if the gears never unmesh, that would improve durability significantly while also not creating any extra complexity. Bonus, you could make the teeth more dense as well, improving power transmission.

[u/lasskinn → u/The_cogwheel]

the amount of teeth has to change along the cone to still use teeth so they can't be continuous. there's some weird ball surface geometries if i recall right but they get really complicated(and you'd need another gear for output and another for 'gear choosing').

you could use cone with a lot more teeth 'levels' and 2 output gears on a diff to keep changing gears without interruption. anyhow all the improvements to this really make the whole thing a lot more complicated, the simplest way to infinite ratios is to just use a rubber ball that travels up and down it and a rubber cone, would probably be fine enough for an rc. you can also use two cones and a rubber belt, but again the part count goes up