Joint and motion for planetary gears.

[Anonymous]

Hi all, I'm trying to familiarize with fusion360 and trying to realize a planetary gearbox like this one:

http://bestanimations.com/Science/Gears/planetary-gear-set-animation-5.gif#.WhlTMjkALFY.link

So, I can move the central spurg gear around its axis, but I can't move the 4 planet gear around both axis I need (itself and around the central spur).

Someone can help me with joints and motion?

Thanks in advance.

[lichtzeichenanlage]

Can you attach or share your project?

[dieselguy65]

please share your actual model.

[jeff_strater]

Well, I admit defeat on this one.  I tried a bunch of approaches, using joints and Motion Links.  Even Motion Study seemed to have problems with this.

For anyone who wants to take a crack at this, here is a simplified model:

Model is attached.

Jeff

[TrippyLighting]

I believe this can only be achieved with the use of a 4th component,the planetary gear carrier. Without that component a planetary gear would be relatively useless.

Two motion links and a little math will take care of the rest. I might have oversimplified the calculation for the motion ratio of the planetary gear, but in concept the assembly works as intended.

[jeff_strater]

Very nice, @TrippyLighting.  I should have done more research on the mechanism itself!  Thanks for the solution.

Jeff

[Anonymous]

Thank all for your reply.

I'will try to add the the planetary gear carrier as @TrippyLighting suggested me and will keep you informed.

[Anonymous]

With the carrier I obtained all movements but I'm going crazy with speeds.

[jasonhomrighaus]

Here try this model, in particular note the use of the joints to obtain common axis points.

[jasonhomrighaus]

whoops sorry posted in wrong thread