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Alternative paddock stand - how does it work?

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Mr Hammers
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PostPosted: 17:11 - 05 Oct 2010    Post subject: Alternative paddock stand - how does it work? Reply with quote

This stand was posted in General Bike chat, but I thought if I ask my question in here it's more likely to be seen by those who might know the answer. So...

..this is the alternative paddock stand;

https://www.youtube.com/watch?v=Nzax29SzMyg

and I want to make one.

The only thing that I can't work out, is how the mechanism that actually lifts the bike works, as it looks like it's hidden in the body of the stand.

There's a lot of travel on the lifting arm obviously, but it only appears to move the smaller arm connected to it a little way. What I'm trying to work out is how that small movement is converted into the bigger movement of actually lifting the bike up to get the wheels far enough off the ground.

Any engineers (or generally clever people) in that could explain, or even better draw us a diagram?

Cheers!
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MarkJ
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PostPosted: 17:56 - 05 Oct 2010    Post subject: Reply with quote

Looks like a class 1 lever to me.

You have a pole with a pivot at the top. Lever goes across this pivot - handle at one end, connector at the over. You then have a linkage from the connector that drops down and pulls up on the 'slider' that is stuck in the frame.

Off to mspaint I goes...
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MarkJ
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PostPosted: 18:02 - 05 Oct 2010    Post subject: Reply with quote

https://i47.photobucket.com/albums/f186/markjackson13/lever.jpg

Red dots are pivots, the black bits are metal, and the gold bit is what's attached to the bike. Left diagram is the bike on the ground, right is it in the air.

Looks to me as though it's held at the top by a hole in the main post and a spring loaded pin that pops into this hole when it reaches the top.

Edit: Also, (and I think this is correct) if we look at the main handle at the top, if the handle is four times longer from the pivot than the other side then you have to put four times less effort in to lift the bike, so longer handle = easier lift
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Frost
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PostPosted: 18:10 - 05 Oct 2010    Post subject: Reply with quote

From the layout of the supports it might not be a good idea to sit on the back seat with the front wheel out Wink
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L4Isoside
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PostPosted: 18:12 - 05 Oct 2010    Post subject: Reply with quote

DaFrostyOne wrote:
From the layout of the supports it might not be a good idea to sit on the back seat with the front wheel out Wink


Exactly as i thought Shocked
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iooi
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PostPosted: 18:53 - 05 Oct 2010    Post subject: Reply with quote

2:22 to 2:28 shows exactly how the works line up Thumbs Up

Same as in MarkJ drawing.

If you are going to make on, I can think of a improvement....

Add another leg to the base... If someone lent on the RHS it could easily tip over as there is no outboard support on the LHS
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0l0dom0l0
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PostPosted: 19:42 - 05 Oct 2010    Post subject: Reply with quote

Baically, if i were going down this route, i woud make a mechanism simular to this:

https://i1183.photobucket.com/albums/x474/0l0dom0l0/PaddockStand.jpg

This is a close up of the mechanism. the gold cog is the one attached to the handle.

https://i1183.photobucket.com/albums/x474/0l0dom0l0/Paddockstandmechanism.jpg

the blue bit is what you would attach the tubes that lift the bike up to.

hope that makes sense.
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Frost
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PostPosted: 02:33 - 06 Oct 2010    Post subject: Reply with quote

If the cog was free to rotate that wouldn't work.
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Mr Hammers
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PostPosted: 09:25 - 07 Oct 2010    Post subject: Reply with quote

Cheers all. Thumbs Up

Especially Markj for the rather excellent paint job! Thumbs Up

I can see it now, not sure why I couldn't before... think I was looking for some kind of clever internal mechanism, but it's actually a lot more straightforward than I thought.

Agree on the extra leg, iooi. I think I might even add another two that can fold up so as to make it easier to store when not in use, just to make it even more stable. But I'm definitely going to make one, as it is a relatively simple device, and is a very efficient way of getting a bike off the ground. Probably won't bother with the wheels at first as it won't need pushing anywhere, just lifting.

0l0dom0l0 wrote:
hope that makes sense.

I see what you mean, but I don't think it would give me quite as much lift movement as the other connected rod system. Do love the cog drawing though Laughing

I'll post it up here when I get chance to make it, of course. Cheers!
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stinkwheel
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PostPosted: 09:37 - 07 Oct 2010    Post subject: Reply with quote

Seems far to bloody complicated to me.

All you need is a bit of wood or an axle stand.

Squat next to the bike on the right hand side with the bike on the sidestand. Push up and away against the tailpiece with your left hand. The back wheel will come up off the road. Put your bit of wood/axle stand under it.

If you do the same again the other way, you can put another bit of wood/stand under the other side in the same way.

If you have a single sided swingarm, the alternative is to turn the footpeg upside down and put your bit of wood under that. Or put it under the frame near the footpeg hangers.

Takes no more physical effort than putting one on a paddock stand. Has just as many points of contact (ie. 3).

If you want to go one further, jack up in front of the engine too Wink
https://i48.photobucket.com/albums/f216/stinkwheel/Image020.jpg
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pinkyfloyd
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PostPosted: 09:40 - 07 Oct 2010    Post subject: Reply with quote

stinkwheel wrote:


I dont want to draw attention to it but...... Your subframe looks missing and some bugger's stolen your wheels.

That'll never ride well Laughing
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razy60
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PostPosted: 12:18 - 07 Oct 2010    Post subject: Reply with quote

Pillion looks well sexy Shocked
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Villers
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PostPosted: 00:20 - 09 Oct 2010    Post subject: Reply with quote

If I woke up on christmas morning and the girlfriend had bought me one of these I would marry her. Awesome bit of kit and I can see it going well in my garage.

Last time these things came up I remember thnking how awesome they were. Bit pricey though Confused

Someone best start making a more generic one soon that costs £50 Laughing
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