Freewheeling Spool

iWinch · Ollie Joined: 15 Aug 2007 Posts: 93 City: ATL

I have been thinking for the past year about how to create a spool with a freewheeling gear similar to the freewheel on a bicycle hub. It would really take someone with a machine shop a serious knowledge of the product. Obviously the bike chain is prob not durable enough, and aside from that, the axle on a bmx bike is very small. However, anythings possible. If a heavy duty freewheeling spool gear could be created, it would be the ultimate must have on a winch. No need for pins or anything. When the drive is engaged, the spool would be realing in... when stopped, it would be butter to pull the rope out. And it would make a harmonious clicking noise simlar to the motorcycle engines we made as kids with a card and closepin. Post your thoughts and comments. I'm sure its been mentioned and there something Ive overlooked.

POPTART · 360 flip Joined: 24 Jul 2007 Posts: 7621

good idea man.....a dirtbike hub has room to work inside it Wink

and its chain is beefy....

iWinch · Ollie Joined: 15 Aug 2007 Posts: 93 City: ATL

This is true. I am just trying to image a dirtbike hub. Is the gear directional. In other words, does it drive forward but freespin in the opposite direction? I know the clutch disengages the drive but, from my memory, when i look down, the chain is always moving when the bike is rolling.

Steven M · Posted: Mar 07, 2008 10:43 am Post subject:

I've had this same idea for a year now. Just never got past the "dam it would be pimp if the winch had..." stage.

The chain on a dirtbike moves with the bike. Always moving.

chriscut · Backside 180 Joined: 28 Jun 2004 Posts: 2000

I've also been thinking about how to do this for some time.

The hive still has the best system at this point. The spool can be powered in reverse.

Now you can use a CC for an easy pull out.. but then your pull wont be as clean and smooth as a TAV.

http://en.wikipedia.org/wiki/Freecoasters nice read

De Oro · Backside 180 Joined: 20 Nov 2007 Posts: 1064 City: Austin

someone is doing it already

337 phw · Posted: Mar 07, 2008 11:41 am Post subject:

http://forums.wakeboard.com/winch/6790-new-winch.html these boys have this

iWinch · Ollie Joined: 15 Aug 2007 Posts: 93 City: ATL

Dammit I am at work so I can't view the pictures. We used a CC for the first winch and it sure was simple pulling the rope out. Can't wait to see what the setup mentioned above looks like.

POPTART · 360 flip Joined: 24 Jul 2007 Posts: 7621

price.dan · Backside 180 Joined: 10 May 2006 Posts: 1404 City: Regina

I've always had this though in the back of my mind for my winch. Between the winch genius's on here we should be able to come up with something....Jeff could you just make this for us and save us the time and effort?

POPTART · 360 flip Joined: 24 Jul 2007 Posts: 7621

ill donate a dirtbike hub!! (to the cause)

pm me if u want to try it

your choice of metals and sizes.......i will give out 3......and split the shipping with you

iWinch · Ollie Joined: 15 Aug 2007 Posts: 93 City: ATL

I cound be wrong but I am pretty sure a dirtbike sprocket is fixed to the hub. This would create the same problem we all experience now.

I am referring to a BMX freewheel which will only drive in one direction and rotate freely in the opposite.

iWinch · Ollie Joined: 15 Aug 2007 Posts: 93 City: ATL

Wait a minute, my own picture made me rethink my ideas. I forgot that there is plently of room inside a freewheel. this could work somehow.

POPTART · 360 flip Joined: 24 Jul 2007 Posts: 7621

well if u want a front....or rear...(wich IMO could be made to work) let me know

and the Older model dirtbike hubs could be "milled" the newer ones are definately lighter and less to work with

martijn · Ollie Joined: 28 Sep 2003 Posts: 62 City: AMSTERDAM

my very first winch in 2004/2005 had that set up with a bearing that blocks in one direction and turns the other, the same as a bicycle and that bmx freewheel

it was ready to test and we (me, my friends and the guys at the machine shop) all overlooked that:

it does not work:

rolling up is going fine
when it is completely rolled up you cannot freely unroll it
you can freely roll it up further

iot

the axle turns clock when you are skating
when it is rolled up the spool can roll clock wise while the axle is not turning
but you want the spool to turn counter clock wise (and the axle not turning)..........................

iWinch · Ollie Joined: 15 Aug 2007 Posts: 93 City: ATL

martijn · Ollie Joined: 28 Sep 2003 Posts: 62 City: AMSTERDAM

i'm sorry for my english that stinks

i'll make a drawing

turning the engine does not help i think

Kay-Kay · Posted: Mar 07, 2008 4:04 pm Post subject:

iWinch, the type of bicycle "freewheeling" you are talking about wouldn't work. Think about it. How would the spool know when the force is pulling the rope out or is pulling the rider up? The way it works on a bike is that you can either accelerate the wheels by pedaling or the wheel will spin freelyin the same direction. With a winch you want it to spinn freely in a direction opposite to the direction it travels when it is powered by the engine.

martijn · Ollie Joined: 28 Sep 2003 Posts: 62 City: AMSTERDAM

1: skating is going fine
2: you cant roll up anymore
3: you wanna unroll but what you only turn the spool in the same direction (while the axle is not moving)

it makes no difference if you use bearing* (like i did) or a sprocket with a bearing* in it

* bearing that turns one side and blocks if you wanna turn it the other way

hus #1 · Ollie Joined: 05 Mar 2008 Posts: 71 City: UK

what you have to make is a ratchet system like whats inside a ratchet wrench

so it rotates freely (giving out the clicking noise) in one direction(pulling out rope) and when rotated in the other direction (towing rider) it engages

simple device to make really, or just bust open a really big ratchet wrench and use the insides