silviasol said:
I have seen this thread updated but haven't read thru it all. I see some pictures of broken gears. Has this happened to just extreme riders or almost everyone. Are they still available?
2 motor failures total from the thread, I am not so extreme either, just commuting on good smooth paths, light weight setup + rider, maybe pushing the specs of the intended use out a bit - 44v @ 36kmh on flat, originally specced as a smaller wheeled 36v, but I don't think the gears change in the 48v motor, so I'd only be straining the coils if anything...
I think the gear change timings could be a big factor as when I replaced them there really is a fair bit of play in the gears when switching direction (and the key didn't eliminate movement in the gear plate), the way the roller clutch engages should cushion that, but maybe sometimes there is a 'perfect storm' scenario, where it grabs too fast too early and finds the weak tooth on that cog which had a small defect...
The physics of the trike could produce a large force as knutselmaaster suggested, as soon as you turn a corner, the axle would try to twist itself to cope with the different forces as one side tries to accelerate as the other decelerates effectively creating a braking force on one side.
I wonder if the axle twisting might be more of a factor than the spike in motor load, as I wouldn't image that the motor would load any more than what happens when you hit a big hill, really...
trying to think... if it twists the Key could twist the gear plate and move it out of synch a bit, but hard to imagine it'd be enough to make a difference
hmmm, maybe there is enough warping in the axle to seize the Sun gear, and Bafang wouldn't have the extra sun gear?, but again seizing a bearing from axle warp isn't easy to do
