Progress update:
I've got 3 designs roughed out:
- Planetary 5:1 reducer located in the Mecanum hub. I was excited about this when I found this video: e-Bike Hub Motor I immediately thought of the Sturmey-Archer 3-speed bikes of my youth. I got an old unit from my local bike shop's junk bin and thought I had a cheap source for the planetary set. The design I've sketched requires pretty complicated shafting and I'm doubtful about putting the planetary at the end of the gear train (shock stresses). the current design requires disassembly of the Mecanum to access the planetary set
Also, I envision an oil dip system for lubrication and expect this to be a problem in the hub. - Move the planetary set outside hub but on wheel axis. This has the same issues with gear tooth stresses.
- Move the planetary set to motor shaft and integrate into one gearbox with the 3:1 bevel gear set. AM has a COT setup for this, as geomapguy pointed out: AM COT
I haven't totally given up on the gear-hub idea. I'm waiting for the Matex set to arrive. When I get it in my hands and get a better feel of mounting/shafting requirements, I'll know better how to proceed...