[Caevlist] Electric chainsaw for E-bike project?

[Alan Dennis]

Hi Corvallis EV Clubbers,

 

I’m thinking of repurposing an electric chainsaw to give my bicycle a boost while pedaling up a steep hill.

 

I already have a couple of 40V Ryobi batteries (~95 Whr with internal BMS) that I use in my lawnmower and rototiller.  Someone has torn apart a Ryobi Chainsaw and battery pack and documented all the components and how they could be used to build a go-kart.  The following image is taken from that page:

 

 

The part I’m struggling with is the mechanical engineering.  Here are the issues that I’m anticipating:

 

1.       It will need a gearbox to reduce the motor speed to something usable.  The motor shaft is “12mm diameter with 10mm flats”.

2.       How should I interface the gearbox from #1 with a bike chain?

3.       How will I keep everything waterproof?

 

Is anyone willing to lend me their experience, even if it’s just to say “don’t bother”?

 

Thanks,

Alan Dennis

-------------- next part --------------
An HTML attachment was scrubbed...
URL: /pipermail/attachments/20160714/a9e20643/attachment-0001.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 1044415 bytes
Desc: not available
Url : /pipermail/attachments/20160714/a9e20643/attachment-0001.png