I’d think the two bevel gears would have more friction than a chain. Can it shift gears?
= = =
Yes.
Chain drive 1-4 % friction loss.
Shafts about 20-25 % friction loss.
Unless it is easier to hide battery powered motors in the shaft design????
Now the gear shifting may be more continuous with the shaft design, kind of like a CVT transmission. But is that worth the friction loss?
“Chain drive 1-4 % friction loss.
Shafts about 20-25 % friction loss.”
Ouch! There are a lot of bevel gear assemblies out there. Those must be more efficient.
https://www.surpluscenter.com/Power-Transmission/Gear-Reducers-Gearboxes/Gearboxes/
Also see power transmission category on the site.