I built an electric bicycle

[swampratt]

Cleaning the back yard and sheds and I knew I had plenty of things to build a couple electric bicycles.



I had stuff laying around the yard and decided to use some of it.

Crude but goes down the road. I need smaller batteries.
I have it hooked up as 24 volt with this 36 volt rated motor.
Up the hill to the stop sign it goes 13 mph and down it hit 20 mph.
only about a 4 degree slope.

Not much torque set up like this and I will get 36 volts on it some time and see if it's better.
Just a 2 wheel solid hand truck wheel attached to the shaft and spins against the rear tire.

Light switch to turn it on taped to the handle bars.
Notice the flat steel that I attached the motor to and at the end I put a heavy spring to put tension on the wheel.

 

[El Pablo]

Hmm, now thinking how to mount the motor to hook it up to the chain instead...

 

[kingfish]

Pretty interesting. I'm not sure I would trust that Everstart plastic handle if you hit a rough patch of road though. Could get painful.

 

[Perplexed]

Hmm, now thinking how to mount the motor to hook it up to the chain instead...

Flip the motor around and run a belt and pulley system down to the sprocket. Not a chain, otherwise his bike might do this:

 

[El Pablo]

Flip the motor around and run a belt and pulley system down to the sprocket. Not a chain, otherwise his bike might do this:

View attachment 285295

That sounds awesome. Will make a great "hold my beer" moment.

 

[swampratt]

The chain hook up thing was my first thought and I robbed parts off another multi speed bicycle but the chain on those are not solid they will slack up and too many idlers would be needed as I would need to twist the chain 3/4 of the way around the gear.

I tried that for 2 hours and gave up.


This was just for test purposes and I drove it up and down the street a dozen times to work out bugs.
Final attempt will house the batteries in a box or welded cage.

Need a different kick stand also.

I get the bike going about 5 mph and then flip the light switch on the handle bars to apply juice to the motor otherwise it will spin against the tire for a bit.

 

[swampratt]

I do have a few car engine starters and really wanted to use one of them because the TQ they have.

 

[Perplexed]

I do have a few car engine starters and really wanted to use one of them because the TQ they have.

For sure you’d need a wheelie bar!

 

[swampratt]

For sure you’d need a wheelie bar!

yes I would.
Old guy neighbor told me they hooked up 1/2" drive air impacts to a go cart once and had 100 feet of hose and a guy at the beginning of the hose ready to unhook it when they got close to the end.

450 lb of TQ on each of those impacts he said it would go 100 feet in nothing flat.

I have a couple of side shaft engines and some 2 stroke weed eaters laying around also.
I may get a bit more frogy soon.

 

[retrieverman]

Cleaning the back yard and sheds and I knew I had plenty of things to build a couple electric bicycles.



I had stuff laying around the yard and decided to use some of it.

Crude but goes down the road. I need smaller batteries.
I have it hooked up as 24 volt with this 36 volt rated motor.
Up the hill to the stop sign it goes 13 mph and down it hit 20 mph.
only about a 4 degree slope.

Not much torque set up like this and I will get 36 volts on it some time and see if it's better.
Just a 2 wheel solid hand truck wheel attached to the shaft and spins against the rear tire.

Light switch to turn it on taped to the handle bars.
Notice the flat steel that I attached the motor to and at the end I put a heavy spring to put tension on the wheel.

View attachment 285287View attachment 285288

That’s pretty dang cool!!!