Benzo
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| posted on 25/3/11 at 10:04 PM |
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Quick Lift low entry Paddock jack
Something like this?
Has anyone got one lying around they would part with?
Thanks,
Iain
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PSpirine
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| posted on 25/3/11 at 10:11 PM |
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Have you thought about making one? We did something fairly similar for a single seater (circa 250kg) and we even had one that had no fancy pivots etc.
and was still useable by one person.
It's fairly straightforward unless it's for a heavy car and you start adding multiple pivot points etc.
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Benzo
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| posted on 25/3/11 at 10:37 PM |
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quote:
Originally posted by PSpirine
Have you thought about making one? We did something fairly similar for a single seater (circa 250kg) and we even had one that had no fancy pivots etc.
and was still useable by one person.
It's fairly straightforward unless it's for a heavy car and you start adding multiple pivot points etc.
its just for lifting a 480kg westie..
Would like to make one, but id ideally need one to copy beside me to make pivot points etc in the collect place surely?
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Mistron
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| posted on 26/3/11 at 09:28 AM |
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They are pretty easy to make. I made one years ago when i worked in the development shop designing 'green machine' sweepers
The key geometry is to make the angle between the handle and the ground less than 90 degrees (so that when the jack is lowered / handle raised, the
handle 'leans forward' over the body of the jack), so that when you pull it through its arc to the ground it goes over centre. I think I
used an 80 degree included angle.
The only other critical dimension is the length of the sections which set the height of the floor when the jack is raised. the one in the picture
looks like it has been geared up from the handle to the front end vertical.
everything else is pretty much just to hold the key points together in the right place - a classic spaceframe, just like a chassis!
Looks like a classic project to make a flat carbdoard mock up first to check the vertical geometry, then move into 3D
you can actually make them even more basic if you fit jacking points to the car into which a section of tube / turned boss can slot. You see the
brackets on a lot of racing cars (particularly cobras, fitted on the bumper mounts) and the jack is just a long 'L' shape, with wheels at
the corner, and the included angle less than 90 degrees.
Look for a classic 'pit stop' photo from the '50s or '60s and you'll probably see this basic version in use.
Hope that helps.
or the 'basic' version (and Rob Walker's very nice 250 SWB!):
Uploaded with ImageShack.us
[Edited on 26/3/11 by Mistron]
[Edited on 26/3/11 by Mistron]
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Benzo
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| posted on 27/3/11 at 06:59 PM |
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Thank you guys, looks like i have a mini project on the go
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