Double pinion Planetary gears.

chand_basha

Hi all,
I am facing a small problem in the assembly of a Double pinion planetary gear system. Planetary gears are interfering with sun gear. 
Any help would be appreciated.

Thank you

link to my document: https://cad.onshape.com/documents/c8eb0994416574a18b8c7fd9/w/4b77e533796f0e5b0bb8d496/e/1e4bab8f86d4ff017342712f

NeilCooke

Probably the gear ratio - can't tell unless the doc is public

chand_basha

Made doc public

NeilCooke

If I'm honest, I'm not sure what the issue was. I reassembled it from scratch starting from the outer planetary gears and it works...
https://cad.onshape.com/documents/e1a2e568af31c4f0e97248fe/w/3fa511e62ccb433df4dfc8ff/e/daa52a709920424f5f6dd289

NeilCooke

BTW, you are not using the official spur gear script which can be found here:
https://cad.onshape.com/documents/5742c8cde4b06c68b362d748/w/b493e0cb681bbf9497d9f4b3/e/c72760543a0d4412e72f6d38

chand_basha

Thanks @NeilCooke
                                  I genuinely tried lot of times by modifying gear ratios. Eventually, I was not getting proper meshing. 
The mistake I did is, I have created a Revolute mate of a Sun gear with one edge of a Ring gear, that I shouldn't have done. 
By looking at your assembly I get to know this mistake.

Thanks again for helping me

chand_basha

BTW, while doing design calculations Should we Consider 6 planets or 3 planets in a Double pinion Planetary gear set? I have attached a few photos of the Conditions I have followed, please see them if you are free.

NeilCooke

Adding more planets just alters the direction of the output shaft (unless I am misunderstanding the question)?

chand_basha

Ok. Thanks for the information.