2 speed transmission idea - Page 6

viperdout · #76 12-22-2004, 10:19 PM

Quote:

Originally posted by Capt.ArD
good idea viperdout, but isn't the controller 2-channel? how will you control the bit motor?

anyway, the more i think about the governor, the more i believe that ill need a super-special pinion made. this will fix ya problem sawhit
the pinion would have more teeth on one end than the other, and the odd teeth tapering out, to smooth the transition. like this.

even so, it may grind. ideas?

Well, I'm leaning towards a spring idea, but the bit motor could either be wired through a regulator to the fets or possibly on a time-release mechanism. The spring simplifies it, and just uses centrifical force. I'll draw a diagram tomorrow.

ben1112 · #77 12-23-2004, 03:48 AM

Well okay, i know that for many things that are created are thought to be impossible. Like einstein and the the electricity stuff. People thought he was crazy. Okay i admit i was harsh. But a project like this would be very costly as it needs to be very small and precise. it might be possible on a bigger scale.
Have you guys find a way to overcome the problems posted? Some said you need Cnc workshops and very precise tools.

Let me be your motivation. Prove Me Wrong OKAY?

I will buy your product if it works and is effective.

I Hope you guys will have the last laugh at the end of the day. which i still think is difficult.

(I take back the vulgar terms i used. Im sorry)

ben1112 · #78 12-23-2004, 03:58 AM

What im trying to say that the community is very important as they come up with many ideas for aftermarket mods. But one must be realistic. I don't want to burst your bubble but in order to make a successful project you must know what are you trying to acheive? Like many have said, Electric motors make max torque at 0rpms. IT can be done. You can make a 2 speed. but at the end of the day what purpose does it serve? have you guys thought about it? It's good to be innovative but please do not waste resources and regret later.

sawhit4 · #79 12-23-2004, 12:37 PM

wtf is up with this mastermod dude flaming everyones ideas then giving us his life story for the past couple of days then giving us a list of everything he owns? oh wait did he not get the memo? NO BODY CARES!

***start mastermod impresson***
Ah dude your xmod sucks, im gonna run it over with my smaxx, or maybe i'll use my rc10gt, or maybe ill shove it up my *** cuz im doin your dad, blah blah blah blah blah
***end mastermod impression***

oh and by the way if i know what your talkin about its for taking off very small ammounts of the comms of electric motors. All it can do is remove a small ammount of material from the round comm i seriously doubt without serious modification that it would be much help here. And since they cost usually around 300-400 dollar range i wouldnt want to screw one up.

And one more thing about emaxxs sucking, I guess thats why they were the best selling electric monstertrucks for a heck of a long time and are still in the top. Funny how that stuff works huh?

Ben i bet theres no harm done. The guys here have shown no regret or desire to stop what their doing and i bet they will keep going with this until they get something like a two speed.

Now back on topic ive been thinking and i believe the only way this will work and be robust enough to last is to make it like the two speed in a larger scale rc. All mechanical linkages, no spinning weights, nothing like that. Kinda get what im saying?

viperdout · #80 12-23-2004, 02:12 PM

CVT.

sawhit4 · #81 12-23-2004, 02:15 PM

so the belt moves up and down? wouldnt that require the belt to be stretchy? im not sure where you would find one that would stretch enough. and the springs would have to be very soft to get them to move from the spinning force. I think that since the springs would have to be so soft that it wouldnt do anything because the belt wouldnt stretch easier than the spring.

Capt.ArD · #82 12-23-2004, 02:20 PM

ok viperdout, i see what you mean, but i dont think you are saying it correctly. Are you sure it's centifugal force that moves the pully? centifugal force moves rotating objects away from the axis of rotation, you need something to move objects along the axis. see what i mean? maybe i just don't follow your explaination, but it seems you got your physic mixed up a bit...
good idea tho.

viperdout · #83 12-23-2004, 02:29 PM

Quote:

Originally posted by Capt.ArD
ok viperdout, i see what you mean, but i dont think you are saying it correctly. Are you sure it's centifugal force that moves the pully? centifugal force moves rotating objects away from the axis of rotation, you need something to move objects along the axis. see what i mean? maybe i just don't follow your explaination, but it seems you got your physic mixed up a bit...
good idea tho.

That's what I said. The pinion on the motor moves away from the motor, increasing the ratio. The belt would have to be stretchy, and the springs would be soft, but strong enough to pul it back. You'd be surprised how much force a pinion can build up. The idea of the cone forces the belt to stretch. a very wide rubber band could be used as the belt.

Capt.ArD · #84 12-23-2004, 02:43 PM

were you replying to me or sawhit? yes i know how that part works, ive seen it done, but it isnt cetrifugal force that moves the pully in. im not exacly sure how they did it, tho...
btw, a soft o-ring would work really well for your belt. the corners on a rubber band would mess up the movement of your pully.
ill have to think on this some more.

viperdout · #85 12-23-2004, 03:04 PM

Quote:

Originally posted by Capt.ArD
were you replying to me or sawhit? yes i know how that part works, ive seen it done, but it isnt cetrifugal force that moves the pully in. im not exacly sure how they did it, tho...
btw, a soft o-ring would work really well for your belt. the corners on a rubber band would mess up the movement of your pully.
ill have to think on this some more.

I find that it moves outwards. On my brushless xmod, when you put soft slicks on it, and point the wheel up, the tire flies of the top instead of just getting stuck at the bottom.

slugbugg · #86 12-23-2004, 03:10 PM

What viperdout is thinking of is about half of what is needed.

Viperdout you almost have the same variable clutch system that is and has been used in snowmobiles for years and it will work very well.(some atv's use the same system now also)

look at pages 31 & 33 to see how it works
drive clutch and driven clutch

viperdout · #87 12-23-2004, 03:43 PM

Sluggbugg, your title is holding true. It does not engage another gear, it raises the belt up, making the gear ratio closer to 1:1, and is completely variable.

http://home.earthlink.net/~graham1/M...ansmission.htm

slugbugg · #88 12-23-2004, 04:13 PM

educate me wise one.please

Capt.ArD · #89 12-23-2004, 04:38 PM

this site explains centripetal motion. I believe we all should have been saying centripetal all along. not centifugal.

http://www.glenbrook.k12.il.us/gbssc...rcmot/ucm.html

the reason your tire flies off the wheel is because centripetal force loosens the tire's grip on the wheel, thus making it free to move. some other force (ie friction, slight angle, air, imperfections in the surface of the tire) actually makes the tire leave the rim.

viperdout · #90 12-23-2004, 04:53 PM

Quote:

Originally posted by Capt.ArD
this site explains centripetal motion. I believe we all should have been saying centripetal all along. not centifugal.

http://www.glenbrook.k12.il.us/gbssc...rcmot/ucm.html

the reason your tire flies off the wheel is because centripetal force loosens the tire's grip on the wheel, thus making it free to move. some other force (ie friction, slight angle, air, imperfections in the surface of the tire) actually makes the tire leave the rim.

I just learned something. Slugg, think about it this way; As that cone moves more inward, the belt will move higher up, because it'll be squeezed up. This will mean more of the belt will touch the pinion at the same RPM. As it slows down, the belt goes back down.