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    Bicycle cog plugin?

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    sketchup
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    • N Offline
      nickinwv
      last edited by

      Does anyone have a plugin or other resources to make it easier to make bike cogs and chainrings? I'm working on an invention and I don't want to have to make the cogs from scratch. In fact if there are cassette cogs and a freehub spline somewhere I would prefer to just use those. Couldn't find any in the 3D warehouse, just a 6sp freewheel.

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      • Dave RD Offline
        Dave R
        last edited by

        Maybe this or the one here would get you going?

        Etaoin Shrdlu

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        (THERE'S NO PLACE LIKE)

        G28 X0.0 Y0.0 Z0.0

        M30

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        • N Offline
          nickinwv
          last edited by

          Dave, thanks for the links but those are for meshing gears. I'm looking for something for chain cogs, which have a different profile. I found a link to a geometric construction technique
          http://www.gizmology.net/sprockets.htm
          but I was just wondering if anyone had created a plugin that does the same thing.

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          • Dave RD Offline
            Dave R
            last edited by

            I know they aren't for the same sort of gears but they're the only plugins I know of for drawing gears. If you can get the correct tooth profile, drawing them from scratch shouldn't be that hard.

            Etaoin Shrdlu

            %

            (THERE'S NO PLACE LIKE)

            G28 X0.0 Y0.0 Z0.0

            M30

            %

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            • gillesG Offline
              gilles
              last edited by

              Dave is right, from scratch and make a library of components.
              Also for chain look at Chris Fullmer's component stringer in plugin index.

              " c'est curieux chez les marins ce besoin de faire des phrases "

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              • Dave RD Offline
                Dave R
                last edited by

                Drawing the sprockets from scratch shouldn't be that hard if you have the dimensions and other specs. I drew accurate sprockets and the roller chain for this bench vise by hand and it didn't take all that long.

                Bench Chain.png

                Both are made up of a bunch of pretty simple components.

                Etaoin Shrdlu

                %

                (THERE'S NO PLACE LIKE)

                G28 X0.0 Y0.0 Z0.0

                M30

                %

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                • D Offline
                  driven
                  last edited by

                  not a plugin but a tutorial
                  http://sketchucation.com/forums/viewtopic.php?f=15&t=38131&hilit=+bicycle#p336850

                  they can be quite easy once you get the hang of it...
                  john

                  learn from the mistakes of others, you may not live long enough to make them all yourself...

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