electric bicycle

[Metallover]

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.

[brushlessboy16]

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?

[Metallover]

Originally Posted by brushlessboy16

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.

[brushlessboy16]

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

[BrianG]

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.

[mikey09120]

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

[brushlessboy16]

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


way cheaper

[JERRY2KONE]

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.

[Metallover]

Originally Posted by brushlessboy16

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


way cheaper

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...

[brushlessboy16]

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 :)

[JERRY2KONE]

Originally Posted by brushlessboy16

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 :)

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.

[mikey09120]

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

[brushlessboy16]

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?

[Metallover]

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.