This page sprouted from my Tri-Star Wheel Configuration entry, which I've gotten a request for diagrams. And I thought, this would be a great project for Technic fans on the 'net to tackle. Here was my entry, unfortunately the wheels aren't too clear:
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second page
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The following are my diagrams to create the Tri_Star Wheels with Lego Technic pieces. A few problems arose in the design, so any design modifications would be greatly appreciated!
diagram 1
diagram 2
diagram 3
diagram 4 - I feel like DaVinci..
Problems with design:
The main problem with the design is that the axle that interfaces with
the drive shaft needs to be able to "slip" You can test this by rolling
the unit over an obstruction. Notice how the axle stops turning, or
slips backwards or frowards. Since the drive shaft gear is meshed into the
bevel gear on the axle, it dosen't give any allowances for this slip. Now
use your fingers to turn the axle and guide the unit over the obstruction.
Unless the motor reverses directions, the unit will keep getting stuck in
that same place.
One possible solution I thought of was instead of using a bevel gear on the axle, to use a differential. Unfortunately, I don't have the parts so I can't test my theory.
khrome@eccentricus.net
The following are ideas sent to me on improving the Tri-Star design:
