Hey! This thing is still a Work in Progress. Files, instructions, and other stuff might change!

Ball Link

by guibot, published

Ball Link by guibot May 5, 2011

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This thing is to link two chassis to make a 4WD vehicle, still need a bit of work because they tend to touch the ground so I needs some kind of lock to prevent this.

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I forgot to include the Scad files, here they are in case you want to play with them

Also, based off newer trains that use the same method: Add two more wheels to either end, and then add more cars!

Although, if the point is to off-roading, then you probably need to go with the clylindrical connection. :-P

Err, and maybe a hinge so the thing can corner more easily.

Oh! And if the socket separates when stressed, you could always print a ring that slides over the whole socket to hold the two halves together.

Indeed, it seems feasible to make one that'd /snap/ into place, just make it with a spherical cut out of a cylinder, narrow enough so that it only gets slightly smaller than the largest point on the ball...

Zero z-freedom answer: Change the geometry from sphere to cylinder. That eliminates the ability to rotate entirely.

More sophisticated answer: cut away part of the sphere on the ball top and bottom, then fill in /slightly less/ of the socket top and bottom. This will yield a maximum angle of "vertical" rotation.

Oh wait, even more elegant answer: just have the sphere wrap around more of the ball joint. The closer it goes to fully locking, the less rotation you get. To have more rotation in one dimension than the other, just make the hole elliptical.

Very clever ideas!!! Thanks!

Besides that I am thinking in a way to add suspension!!