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DavidKhan1-Visitor
1-Visitor
July 2, 2013
Question

Planetary gear design

  • July 2, 2013
  • 3 replies
  • 9319 views

Hi all

i would like to know how to create a planetry gear reducer.I have modeled all the parts but their mechanism gives problem.

Scenario is that i have a planetry gear head with 5 rows of planetry carriers for a reduction of 1:625.each row has three planetry gear.

Now i have made a sub assembly of Sun gear,planetry gear,and planetry carrier and the gear connection between sun and planetry are correct

BUT the gear connection between the RING gear and the PLANETRY gear is not successful.

NOTE:RING gear is stationary part.

Kindly tell me proper method of correcting these connection.or refer me to some tutorial regarding this issue.

If someone have Planetry gear asembly.kindly email it to - so that i can see the mechanism in action and reverse it to correct my own.


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3 replies

T
TomD.inPDX17-Peridot
17-Peridot
July 2, 2013

I had a similar problem with a ball bearing. Radial bearings are in essence planetary gears.

Have a look at this: Radial Ball Bearing: Checking your mechanism links

If you have the full version of Creo 2, I can attach the file if you like.

    K
    kleipold10-Marble
    10-Marble
    July 3, 2013

    In class we mock a spirograph. We have a stationary ring gear, and to get the internal to spin around, we use a "dummy plate" that is pin connected to the ring, and the spur gear is pinned to a hole in the dummy plate.

      D
      DavidKhan1-VisitorAuthor
      1-Visitor
      July 3, 2013

      Kate Leipold

      you are correct but that it would be good if someone elaborate it more in term of proper constarints for all the components and stationary ring gear.

      K
      kleipold10-Marble
      10-Marble
      July 3, 2013

      absolutely. My main point was that there needs to be to pin pairs. I do have an old planetary gearbox somewhere. I should look that up.

      R
      rlewis1-Visitor
      1-Visitor
      November 4, 2013

      Hi David,

      Did you solve this yet. I have just managed to het a sperical roller bearing working. It was a matter of assembling things in the correct order (fixed gear (outer race in my case) first) and including the planet axes in the carrier part.

        T
        TomD.inPDX17-Peridot
        17-Peridot
        November 4, 2013

        Welcome to the forum, Roderick.

        Did you confirm the ratios you are using are correct? That was a bigger problem for me than setting up the rest of the bearing file. It "looked" okay until I tried to confirm it.

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