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gokartmaniac
Apprentice
Germany
105 Posts |
 Posted - Dec 19 2003 : 7:27:20 PM
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hey guys i was at a store the other day and there was this electric scooter and it was really cool but it had a 200 dollar price tag so i wan to make my own like with either a vacuum motor a fan motor dose anybody know of some plans on the internet or something like that thanks
Seth A. Meredith |
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cirvin
Nobel Prize Winner
USA
1542 Posts |
Posted - Dec 19 2003 : 8:11:49 PM
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Aaron Already did this. SEARCH!
Any motor that uses 120v isn't worth it.
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gokartmaniac
Apprentice
Germany
105 Posts |
Posted - Dec 21 2003 : 05:01:46 AM
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I know he did but he used a car fan motor and theres not a place i know of here in seoul korea where i can get that i found a korean vacuum in the trash and took the motor out of it i tested it with a 9 volt battery and it had good rpm and torqe i could hardly hold it with my hands and that was holding the shaft and then starting i think i will use 24 volts and it will be great for a scooter the thing is that the shaft is just a bolt welded on i think i can use a bike peg for a friction drive dose anybody know of any other common things that i could take a motor out of i already have four six volt batteries peace out
Seth A. Meredith |
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Dec 21 2003 : 10:41:54 AM
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What kind of vacuum is this? BE SPECIFIC!
Suitable motors are hard to find. I have given up with the cooling fan motors. They are just not designed for the abuse. In the new year, I will simply be buying a 24V motor off of eBay. There are always 300W scooter motors up there.
Appliance motors are rarely suitable. I personally don't believe that your vacuum motor will run with reasonable speed and torque at 24V. Your 9V test doesn't really prove anything, as I can't stop the shaft of a little 3V "hobby" (toy) motor with my fingers.
It takes a good 300W to move someone at around 30KpH on a scooter because scooters are very aerodynamically inefficient. Much power is wasted pushing an upright person through the air.
What kind of batteris do you have? You mentioned 6V, but what AH rating, what chemistry, etc?
By the way, I dont recommed an friction drive. It is very inefficient, and will slip in the presence of moisture or dust.
Check out this link for lots of electric scooters: http://www.austinev.org/evalbum/index8.html
Edited by - Aaron Cake on Dec 21 2003 10:44:15 AM |
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gokartmaniac
Apprentice
Germany
105 Posts |
Posted - Dec 22 2003 : 06:30:58 AM
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The vacuum is the kind that has the hose and you pull it around i agree about the motor test it probably was not adaquate i have two six volt 9.6 amp hour batteries and two six volt 4 amp hour batteries i dont care about efeciansy but thank you for the advise about the friction drive i jus want a electric scooter and i dont have two hundred dollars thank you i alread read the sight the mutated peewee is cool when its on fire
Seth A. Meredith |
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Dec 22 2003 : 10:21:05 AM
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quote:
The vacuum is the kind that has the hose and you pull it around
Sigh...Make? Model?
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i agree about the motor test it probably was not adaquate i have two six volt 9.6 amp hour batteries
These sound good if they are rechargable. Still, at 12V, you're not going to get much power.
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and two six volt 4 amp hour batteries
I wouldn't waste time with these. You can't mix them in a pack with the 6AH units, and 4AH is just way to small to use on their own.
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i dont care about efeciansy but thank you for the advise about the friction drive
You will when you find out that you can't go above 10 KPH, your batteries last 50 feet and you keep burning up motors. Friction drive is crap. It's a cheap hack used by people without the talent or knowledge to make a chain or belt drive. Don't waste your time with it, you will not be satisfied with the result. If you wish to ignore this advice, then go for it. It's not my problem if you fail. Just reaslise that I have been doing this stuff since before you were born, so I do have a little experience in the matter. 
quote:
i jus want a electric scooter and i dont have two hundred dollars thank you i alread read the sight the mutated peewee is cool when its on fire
That's fine. If you can scrounge the batteries (which you have), a decent motor (which are hard to find, so figure on spending some money) and the scooter (shouldn't be hard to find at a yard sale, etc.) then you should be able to do it for under $100. If you don't want a micro (Razor style) scooter, then you can buy the larger scooter with pneumatic tires and simply replace the rear tire with a small bike tire. Then run a chain from your motor to the wheel directly without having to make a shaft and deal with bearings. Should be simple.
One thing to mention though is that the scooters in the store are generally pretty good. They could use more lead, but have good motors and nice smooth belt drives. Had I known they were so cheap, I would not have made my own...
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gokartmaniac
Apprentice
Germany
105 Posts |
Posted - Dec 22 2003 : 8:52:54 PM
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ok the friction drive is a bad idea there i said it i am going to use a razor scooter for the base vehicle what i am going to do is take off the back wheels axle and replace it with a long screw and then use bolts to hold a pully on the extra length of the screw/axle and then atach anothe pully to the motor shaft and the i will bolt the motar to the back of the scooter yes this will be a tight fit but there you have it.
Seth A. Meredith |
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Dec 23 2003 : 10:05:48 AM
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Sounds like you have the same plan that I did. Here is how I modified my Razor rear wheel (warning, HUGE picture ahead):
The description of this arrangement can be found in the Electric Scooter thread.
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cirvin
Nobel Prize Winner
USA
1542 Posts |
Posted - Dec 23 2003 : 12:24:03 PM
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Cool. I woud have just put a bigger wheel on so the gear doesn't scrape the ground on turns. It would need a bigger motor but I don't care. you could do this with a cordless drill.
There is hope in the Future... |
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gokartmaniac
Apprentice
Germany
105 Posts |
Posted - Dec 23 2003 : 7:18:45 PM
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the seams like a good rig but my rig is going to be very simple it will take 10 minutes not including atachin the motor i am going to use a belt drive i will use a vacuum belt and i think i will use a cordless drill good idea
Seth A. Meredith |
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da-g-dog
Mad Scientist
USA
231 Posts |
Posted - Dec 23 2003 : 9:16:26 PM
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quote:
the seams like a good rig but my rig is going to be very simple it will take 10 minutes not including atachin the motor i am going to use a belt drive i will use a vacuum belt and i think i will use a cordless drill good idea
Seth A. Meredith
Well, you have been told that the belt drive won't work well, neither will the drill. You will likely be able to go faster by man power than by using the drill/belt drive combo. But as my old science teacher used to say, "whatever bouyances your watercraft."
hike master kyle |
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cirvin
Nobel Prize Winner
USA
1542 Posts |
Posted - Dec 24 2003 : 12:19:31 AM
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I was thinkin' like a direct drive with the drill.
There is hope in the Future... |
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Dec 24 2003 : 09:20:48 AM
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Belt drive should work fine if done properly, but finding belts that small and thin might be an issue.
I like the cordless drill idea, as many of the good 18V models run at around 2500 RPM with huge torque. Right where you want to be. They also have very good speed controllers (at least mine does) that goes from 1RPM all the way up to maximum speed.
Do you have any drawings of your "system" or can you write a description? There are many common mistakes, and I believe you are about to make one of them. I want to save you some time and wasted effort. 
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cirvin
Nobel Prize Winner
USA
1542 Posts |
Posted - Dec 24 2003 : 12:30:06 PM
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I would build an electric scooter with a drill, but if I buy even a cheep drill, I will want to use it!
There is hope in the Future... |
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gokartmaniac
Apprentice
Germany
105 Posts |
Posted - Dec 25 2003 : 8:03:14 PM
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heres a rough description of my rig first i will replace the rear axle withe a long screw and the i will use two bolts to fasten the wheel onto the screw ok now we have a new axle with a non free wheeling wheel and a long peace of it hanging out the left or right side then i will either take some pullys out of vacuums or i will build my own out of wood either way we have a pully now i will take two more bolts and bolt one of the pullys on to the protruding part of the new rear axle. after that i will take another screw and use two bolts to fasten the pully on and tighten the screw withe the pully onto the part of the drill where the drill bit gos the i will use straps or the special white slip thingies that can only go one way i believ there is one in the picture of your rig the n once evry thing is ready to be tide down i will use a vacuum belt and place it on the pullys and then i will tighten the drill down and zip off.
Seth A. Meredith |
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Dec 26 2003 : 4:18:19 PM
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Interesting....You don't mention anything about bearings. You will need two bearings to support your axel. I am also unclear about how you are going to bolt your wheel to the "screw". Stock scooter wheels don't provide any mechanism to do this, and I cannot think of a way to do this in a satisfactory way other then the system that I used.
Also, wooden pullies = bad idea. Too much friction. Just go to a hardware store and buy two pullies.
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electric scooter from comon electronics
