Simon
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| posted on 27/1/06 at 10:28 PM |
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hydraulics!
I want to make something for work using hydraulics - lifting/ petrol engine (lawnmower) for propulsion.
The lifting could be done by jack, but would rather it was electrically operated hydraulic (up and down) - any suggestions of really cheap
sources of parts?
Also, for propulsion I'll use a lawnmower engine I have lying around (with centrifugal clutch), but want to drive front wheels (rear steer) -
any suggestions on how to do the drive (prefer a diff) but guess direct chain may be ok.
Top speed about 2mph max weight about 200lbs.
Thanks very much
ATB
Simon
[Edited on 27/1/06 by Simon]
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steve_gus
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| posted on 27/1/06 at 10:31 PM |
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i dont really understand your description, so perhaps this contribution may be even more useless than normal 
You are wanting a pump to create hydraulic pressure?
what sort of pressure / volume would a power steering pump create?
High pressure pump from a diesel engine?
ABS motor / block from summat like a granada mk3?
atb
steve
http://www.locostbuilder.co.uk
Just knock off the 's'!
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flak monkey
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| posted on 27/1/06 at 10:41 PM |
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The power steering pump in a car is a hydraulic pump.
Alternatively if you want something more beefy, go down to a local commercial vehicle breakers yard and get the pump and system out of an old flat bed
with a hi-ab. Might need something more powerful than a lawnmower engine to run it though! 
David
Sera
http://www.motosera.com
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rusty nuts
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| posted on 27/1/06 at 10:52 PM |
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What about adapting an old hydraulic pallet truck? could be adapted so that wheels were driven and lift mechanism operated by hydraulics? interesting
idea.
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Simon
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| posted on 27/1/06 at 11:33 PM |
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Chaps
I guess it might help if I explain what I want to make
A front wheel drive/rear wheel steering powered wheelbarrow with footplate for me to stand on and lifting barrow.
Barrow will be on an "x" with bin rear hinge (top right of x) pivoting top and bottom and front hinge (top left of x) pivoting connected
to hydraulic pump and on a slide.
It's to get some of the waste to the skip and lift/tilt contents thereinto
I know you can get powered barrows but they don't lift and don't have a footplate and cost a lot!!
Cheers
Simon
[Edited on 27/1/06 by Simon]
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Simon
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| posted on 27/1/06 at 11:39 PM |
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Bit like this
ATB
Simon
 
Rescued attachment Image1.jpg
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omega 24 v6
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| posted on 27/1/06 at 11:42 PM |
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why not power it with a couple of small hydraulic motors one on each wheel or if its a single shaft axle youd only need one.
In fact the ideal solution for you might be a salvaged yard where there may be comercial vehicles with slide away taillifts with everything
you'd need to make it 24v or 12 v powered. Some of the retractable units are like straight bike chains and the motor is mounted onto the lift
with a cog on the spindle that moves the lift out and in ( hope you understand that statement it's getting late )
[Edited on 27/1/06 by omega 24 v6]
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MikeR
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| posted on 27/1/06 at 11:58 PM |
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can't help thinking health and safety inspection!
be careful, this has potential to get you in trouble.
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clbarclay
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| posted on 28/1/06 at 12:45 AM |
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quote:
Originally posted by MikeR
can't help thinking health and safety inspection!
be careful, this has potential to get you in trouble.
Any body here remember the various attempts teams had on scrapheap challenge to use hydraulics. The spectaculare failures of the chaos crews
demolition machine keeps coming to mind.
A well designed hydraulic system can be very effective (not overly efficient mind you), but don't expect a modified/codged system to be as
effective as you hoped.
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carcentric
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| posted on 28/1/06 at 01:02 AM |
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Think simpler
Imagine that your lifting/tilting mechanism under the bin (now X shaped) was <> shaped instead. Whatcha got there is one of them there
scissors jacks like wots used fer changin yer tyrs.
Crank, crank, she tips - crank, crank (d'udder way), she's flat again.
M D "Doc" Nugent
http://www.carcentric.com
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907
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| posted on 28/1/06 at 08:34 AM |
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How about a nice environmentally friendly wheel barrow?
I realise it's over twice as quick than what your after but,
you could compensate for this by only putting half as much in. 
Paul G
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rusty nuts
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| posted on 28/1/06 at 09:16 AM |
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And a ramp up to the skip or a skip with a door .
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steve_gus
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| posted on 28/1/06 at 09:15 PM |
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you can get motor powered scre jacks that extend..... i recon thats deffo gotta be the way to go.
google for screw jacks
http://www.trans-quip.com/products/screwjacks.html
http://www.locostbuilder.co.uk
Just knock off the 's'!
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iank
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| posted on 28/1/06 at 09:41 PM |
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From the description you can definately buy them.
The builder was using one while digging the foundations for an extension to next door.
Unlikely to be lo-cost though, but if you want I can ask him where he got it...
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Simon
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| posted on 28/1/06 at 10:40 PM |
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OK,
Forget it's for work
It's just I need something else to build and thought this might be useful!
Thanks for your thoughts anyway
ATB
Simon
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