Bottom View of Left Foot Drive


This is the bottom view of my foot drive. You see the new outer chain drive on the left side. The top shaft is the driven shaft supported by two bronze bushings. The spacer and the Colson caster wheel keep the shaft centered. The EV Warrior motor is below this shaft with a small gear seen on the right side. This small gear meshes with the 4" gear below to drive the 1/4" shaft below the motor. That shaft is supported by small bronze bushings. A sprocket on that shaft drives the small chain and a bigger sprocket on the lower shaft which is the main drive shaft.
Primary change between my V1 and V2 design is moving one of the two Colson wheels from the front shaft to a new rear shaft - driven from a #35 chain and pair of sprockets. The bronze bushings on the front and rear shafts are mounted inside the side plate to allow the sprockets to squeeze in on the outside just clearing the inside of the foot shell. I also moved the two drive wheels to be centered under the foot pivot to minimize twisting torque on the ankle.

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