scissor lift design

Anyone have any info or links to scissor lift design.
I'm looking at lifting 400lbs total to a height of 7ft with base of
66 " by 36".

Any ideas? Preferably with a lead screw for lifting or hydraulics,
can't use electival power.

 

Any reason you can't just buy one of the myriad of lifts on the market?

 

Like I said no electrical power, will be using hand pump for the
hydraulic and hand crank for the lead screw. if possible

Each arm overall is 64" pin to pin is 61".
it is two pairs , I have cad mock up of tow cylinders attached to
base and then to second
pair of arms, when folded the cyliders are at 9 degrees to
horizontal,
i calculate loading to 1917 lbs at thisposition so 958 per cylinders.

I am aware of codes that I can work within.

 

Too bad it has to be a scissor lift. A good alternative off the top of my
head would be a modified tool/die lift. They can lift that load to about
that height, are stable and the manual ones are hydraulic foot pump type as
well as having about the same foot print as a scissor lift would have....

IYM

Like I said no electrical power, will be using hand pump for the
hydraulic and hand crank for the lead screw. if possible

Each arm overall is 64" pin to pin is 61".
it is two pairs , I have cad mock up of tow cylinders attached to
base and then to second
pair of arms, when folded the cyliders are at 9 degrees to
horizontal,
i calculate loading to 1917 lbs at thisposition so 958 per cylinders.

I am aware of codes that I can work within.

 

Keith any pertinent info would be good though, i am needing some help
with bearing /bushing selection and force calc .

If you have any pointers at all that would be good, for instance what
kind of rollers did you use for arms or where they on guides?
What kind of bearings will i need? etc

Thanks.

 

IYM,

Do you have anymore info on this? , I am open to suggestions.

 

The lift tables I was thinking about didn't quite get to the 7' you are
looking for and maxed out at about 5 or 5-1/2'. However, I did find this
one. One criteria you didn't mention was what you needed in a platform for
it. This one I believe is a hand hydraulic pump, max height of 12', 500lb
capacity and has base dimensions within your criteria (without outriggers,
but I don't think they are required for a 7' lift)

Again, this isn't the original design I was thinking of, but it might be
something to look at (without knowing what your lifting)

http://www.yacmachinery.com/vermette-lifts-512.html

They have other lifts with higher/lower capacity, heights and such...

http://www.yacmachinery.com/vermette-lifts.html

Good Luck,

IYM


IYM,

Do you have anymore info on this? , I am open to suggestions.