electric bicycle
 

okay guys.... ive been doin some thinkin and i have this crazy idea to "electrify" my bicycle. wat im planning on doin is using the e-revo transmission with the castle 2200 motor and MMM esc. im planning on buying a 6mm pinion to attach to the output on the e-revo transmission. the pinion will make contact with my bicycle tire and will spin it. the drive ratio of the e-revo transmission is 1.83333 rotations of the spur to 1 rotation of the outdrive. and im goin to factor in the pinion/spur ratio and adjust to attain my speed. i am also planning on buying a back pedal bearing so i eliminate brake shoes and the lever. i also have few questions. do you think the 2200 motor will be able to move a 15lb bike and 120lb. person at about 20mph? will the amps be too much. im also wondering if i can lightly press the brakes while riding to utilize the regeberative braking? im also seraching for a device that connects to the MMM wire instead of an rx that can control the speed.
just an idea.... so suggestions are welcome

There are hundreds of diy electric bike kits out there. One of the good things about electric bikes is that 1000 watts is a lot. The mmm puts out WAYYYYY more then that. Oh Yeah baby,,, yah- trick yaaa.

Look up 1000w currie motor e-bike or something like that on youtube. It's not the best, but here's the first one I found.

http://www.youtube.com/watch?v=TyFYw...eature=related

The easiest way to do it is to get a hub motor kit which comes with everything and is very easy to do. It'll probably be the most reliable way to do it too. If you end up using the mmm, I'd gear for anywhere between 20-30mph depending on the speed and runtime you want.

http://img195.imageshack.us/img195/1156/img0173d.jpg
before electronics...
http://img195.imageshack.us/img195/i...jpg/1/w640.png

http://img195.imageshack.us/img195/i...jpg/1/w640.png
http://img193.imageshack.us/img193/2737/img0175p.jpg
electronics hidden under the seat

http://img132.imageshack.us/img132/1183/img0176lxz.jpg
an overall picture

http://img132.imageshack.us/img132/i...jpg/1/w640.png
http://img198.imageshack.us/img198/2563/img0177p.jpg
pinion will attach to outdrive and will spin the tire and NOT the chain

now i just need to cut a steel plate for the tranny and weld it to the frame

and buy another pinion and grind it a little to stop it from chewing up the tire

still awaiting on 3s 5000mah 30c flightmax lipos to arrivee

that'll just tear up your tire. Video!:yes:

Yup!!.. unless you're already moving.. then it might not... If you want to do something like that, buy an outrunner motor with the 12mm shaft.. :lol:

haha. yah. im gonna have to grind the pinion a bit. just enough so theres still some traction against the tire but not too much as to shred my tire. haha. ah. im gonna give it a rolling start then power the esc

I would use some sort of rubber wheel instead of the pinion idea... Not sure where you can get that sort of thing with a set screw but I am sure it exists...

thats a good idea too... ive been looking around but hav yet to find one. ill keep searchig. maybe i can dip the pinion in plasti-dip or somethig too

spring loaded rubber coated shaft, directly powered by an outrunner or the Revo tranny like you have... it would be awesome to see..

Nice use of masking tape for the battery mount.

I'm also tinking to electrify my bike. But I've got a few questions:
- How to apply throttle if I use a Supersimple 100A ESC
- What to do with steering, how to disable it

Thanks

Matt Shumaker did this to a recumbent. http://www.recumbents.com/WISIL/shumaker/default.htm A ton of great information.

http://www.recumbents.com/WISIL/shumaker/pletti3.jpg

He sells a drive unit:

http://www.recumbents.com/WISIL/shumaker/edrive.htm

http://www.recumbents.com/WISIL/shum...x/IMG_0140.jpg

I have been thinking of this idea for a while, I think Using a cheap servo tester, and mount a lever on the potentiometer.

I also have one of these motors- already with a reduction box on it (50:1 iirc)

Should push a 20in bmx bike pretty decent on 6s.

I already have all the stuff, but I've ran into a gearing problem. I think I need another 5:1 reduction on top of my 2-3 reductions...... I think I'm going to find some scooter or something where the wheels are smaller.

http://i345.photobucket.com/albums/p...1/S7301761.jpg

I think all that chain is putting alot more drag and stress on the motor then it shoul.. just find a lower Kv motor possibly?


What motor is that btw?

There's a lot wrong with it... It's a failed experiement. I'm going to try to find a dead electric scooter or something like that now.

http://i345.photobucket.com/albums/p...1/S7301763.jpg

ha we have a 550w electric scooter motor in a Powerwheels Jeep :)

What about one of those inline planetary gearboxes? They usually are good for around 6:1. Maybe two of those "in series" to get a good ~36:1 ratio would make gearing much easier.

im planning on using this servo tester (suggested by brushlessboy16)
and myabe 2 orders of these for 6s 8000mah 10c for 80A cont and 120A burst for only $80
and this pinion. it has a large surface area and is cheap

now all i need is the tranny plate

http://www.hobbycity.com/hobbycity/s...idProduct=8296
http://www.hobbycity.com/hobbycity/s...idProduct=8373


way cheaper

Thinking.
 

You already have a pile of gear there that needs to be put to good use. Don't scrap that project so easily yet. Just take a step back and rethink your approach. With what you have there you can still make this a very cool project. You may need to go a slightly different direction with your gearing or even your drive setup to accomplish your goal, but it is still possible to get her done.

Maybe a belt drive with a spring loaded clutch assembly, or like suggested my BrianG using an inline planetary gear setup to get your gear reduction would be a better choice. There has to be something that you can do to make it work fairly well. Don't give up on it yet.

I have the second one.

I am considering a friction drive to at least test. Either that or buying some parts made for this application...:diablo:

I have a big brushed motor if you like...

PM me if your interested in it.
443 Kv and a 50:1 reduction box.
Its the same physical size as a neu 2230.


If no i have to put this on my bike :)

Tempting.
 

Hey what voltage is that motor? It sounds like an idea that wold work well in an application like an E-bike? And where did you get it? off of some household equipment, or junkyard, or some other application? I am curious about the motor to.

http://img10.imageshack.us/img10/4418/ebike.jpg
heres the ratios and rpms
this is with 24t motor pinion and 54t spur with 1.833:1 tranny ratio and a 30:1 ratio from outdrive pinion to wheel/tire rotation
2200kv castle neu motor on 6s lipo with MMM and 26in tire diameter

motor is designed to run 12v. but I have overvolted it to 36v. it can handle it. its designed to push 200lb robots. should have plenty of punch to move a bike.

http://www.hobbycity.com/hobbycity/s...idProduct=8373

Can someone explain me how this thing works?

There is a pot (the knob) on the end. If you turn that it will turn a servo, or the throttle on the esc. It has a (iirc) 6v or 6s lipo input. You may want to make a rubber band/spring mechanism that returns it to neutral after giving it throttle. That's what I plan to do.

But you can only give full throttle or no throttle at all, right?

No, it's all variable. How ever much you turn the knob that's how much throttle you get.

http://www.youtube.com/watch?v=GSHms...eature=related

Oh now I know where the knob is... :lol:

Still got a few questions, to make it easier, I made something in Paint. Are all these things right that I'm describing in this pic? And what are those things where ??? stands?

Pic:
http://img5.imageshack.us/img5/3453/87927111.png

I'm holding one of those in my hands right now. The wires are a 6-22v input. The 2 pin is for a 4-5.5v input. You can use either one.

With the button. There are four lights(the white things). One is power. The other displey the mode. One is normal use the knob to turn the servo (or throttle). One is make the servo go back and fourth as fast as it can to test the speed. The other is some wierd mode that is wierd. It might center the servo.... The button switches through the modes.

Oh ok, I thought the Servotester would get his power from the ESC (Like a normal receiver)

Well, thank you for your help Metal! :yes:

If the esc has a bec it might be able to get it's power from it, but most likely you'll need to hook up power to one of the two inputs from an external bec, power jacked off the esc lead (make two wires coming from the esc, one for the input and on for the bec output) or hook it up to your main batteries if you aren't running more then 22v. I'm going to hook mine up to one of my 12v lead acid batteries.