shengyi-x2 as a rear carrier Motor;-)

[mechaniker]

I always have trouble with my 150kg and my hubmotor-bike climbing hill´s so I thought of a different way and placed my shengyi-x2 Hubmotor into the rear carrier, now I´m able to climb easy the hill, even much better as with my 90nm centermotor bike
In the begining I wanted to place my motordesign with some weldings into the bike-frame but then I thought why not into the rear carrier because it´s simple and no weldings necessary. It took a bit of effort but the hard and precision work is done by my selfmade cnc-machine anyways, just click the button and the machine do the work.
This design only has it´s advantage combined with hub-gear!
For testing I use a shimano nexus 8-speed but after now sucsesfull testride I´m considering to to rebuild the whole system in a good bike since I used a bike from the scrap-yard for just 30euro which was at least 10years old. If I decide to do so then I will use the 3x3-nine hubgear because it can take up to 250nm input torque, no borders anymore to boost the controller amps ;-) weight of the system is only 2,5kg (without battery)
Maybe not really pretty but capable of climbing steeper hill as a famour branded midmotor bike....price difference of a chinese hubmotor in compare to a centermotor-bike we even don´t need to talk about

 

[flecc]

Neat job Frank, this is often a good way to use hub motors. Saneagle in this forum created his own hub motored centre drive some years ago but I don't know if a link to that is still available.
.

 

[saneagle]

That's a neat installation.

Yes, I did mine in 2011, before crank drive kits were available. I didn't have access to any machine shop, so I did mine out of readily available bits of bike. I didn't know that there were free-wheeling cranks then. It worked quite well, and it had the advantage of being able to use the gears, like any crank-drive. Not long after I did it, GNG produced their first crank-drive kit, so I dismantled mine and swapped it for a GNG mk1, then a mk2. They were interesting days when all the new stuff was being developed.

The best DIY conversion I saw was from a guy under the name Vautech, who made his own frame and suspension forks out of carbon fibre. He stripped down a Tongxin motor and enclosed it within the frame. There's one of his earlier creations in this thread:

little Tongxin as crank drive - several solutions

Hi... i know, here at endless-sphere the world starts with 30Amps/500Watt and more ;) but maybe these is nevertheless for some of some interest: in German pedelec-forum there are in the moment many trying to use hub-motor with the crank, for better hill-climbing.. Motor: the little, very...

endless-sphere.com

Here's my amateurish one:

 

[mechaniker]

yeab, 2008 did came the a lot of conversion kit companys and a few of them sold as "midmotor" the cyclone-kit including me but that motor was not reliable and noicy and if I remmember correct it had only two senor for the hall. As a mechanic I did saw the potential of those upcoming centermotors for the conversion market so when I had my conversion-kit shop in China/Guangzhou I sold cyclone, Bofeili and all kind of motors but was never satisfied with them so I made my own centermotor when the bafang brought a small 2,1 kg hub-motor to the market and I used that motor-core for my selfmade centermotor with timing belt like Brose has done it years later. It worked pretty nice, noiseless but the market was at that time not ready for such a motor because of course it had a much higher price.
After some search on my storage-drive I found a photo of my bike with the motor I made
It had one of the first envilio hub-gear that just entered the market (btw. this hub-gear was a nigthmare, name was at that Time was Fallsbrock or something if I remember correct)
Everybody who used hubmotor as centermotor used at that time the crank-set from Cyclone because it had a freewheel. Looking back on my motor creation it still look well in red...sorry for the braging

 

[thelarkbox]

Seems like you have earnt some bragging rights, so carry on ..