I was browsing through some old folders when suddenly - ballshifters inside the shaft of a CIM! I’m not 100% sure why I once thought this was workable but I thought I should post it here.
I definitely made some interesting engineering decisions on this.The overall module shape isn’t bad, but the versawheel is connected to the ring gear via standoffs (not shown) that would attach to a 1/16" plastic flange on the versawheel. I think the gear ratios were 3:1 and 7.7:1 on a 4" wheel, for free speeds of something like 30+fps high and 12fps low.
On the actual shifter, apart from being super small, the overall design of it didn’t look that bad. Except the balls could be completely stuck inside the shaft and not engage the gear, and required a 3/32" hole to be drilled 2" deep or so into a CIM shaft.
Overall I’m simultaneously repelled and attracted to this thing. It’s interesting to look at old designs like this one and wonder how to make it workable. Shifting inside of a CIM-in-wheel swerve is an interesting concept and if the CIM shaft were larger I might try something like this seriously. Who knows, maybe there’s a way to make it work out there.