Wooden planetary gearbox

Variable pitch planetary gear system made of wood. The stationary gear has 36 teeth, the motor gear has 11 teeth, the planet gears have 13 teeth, and the output gear has 39 teeth. As you can tell the single stage reduction is quite high, i forget exactly but it's over 50:1. This is due to the 36 and 39 tooth gear-set being the same pitch diameter, but since they are a different number of teeth, their pitch is obviously different. The planetary gears pitch is halfway between the 36 and 39 tooth gears. This causes some efficiency issues, but I have no idea how much.

Category:

Science & Technology

Tags:

• wood
• gears
• planetary

[LuiNJae]

Great work I would like to know where you got the plans or how you made the gears. and what did you use to design this?

[klickrr]

@LuiNJae The idea i saw in a winch I took apart, I designed the CAD files in QCad, and I have a CNC machine I cut the parts out on. I think one of my other videos briefly shows my CNC machine cutting some steel.

[MrStevestocks]

weed grinder???? lol

[klickrr]

@MrStevestocks haha... no comment

[TheIceychill2]

but if you put load on the top annulus wont the planets just keep going around instead of transmiting power?

[klickrr]

@TheIceychill2 The last big gear I put on (that has the spiral effect on it) would be how you get output power. Generally you'd have an output shaft off of it, plus in a real design all that would be internalized in a case. It definitely had a lot of torque, with only 40 watts going in I couldn't stop it. This design I pulled from a 3000 pound winch, well, not the design, but the idea of variable pitch gears.

[IndisputableAttitude]

No words, Demo says it all!

[pd4748]

gear head

[PratendePraat]

This is a great idea to make a motor to go slow!!!

[klickrr]

@academicroach I guess a little, I used a gear generator to create the base gears, I wrote a custom subroutine to modify the gears for this application, but it wasn't much really.

[mjtunstall1976]

now that is how automatic gearbox works!!!