RE: (ET) rear lift

["Elie, Larry \(L.D.\)" <lelie ford com>]

Good idea, and it was done to some extent.  If you look at some older 
equipment, 
they mount a pulley on the end of a hydraulic rod, with a cable fixed at 
one end 
going around the pulley.  The other end of the pulley doubles the speed or 
 
the travel, depending on how it was set up.  The actuator takes the same 
time as 
it did, but the cable travels twice as far, so the effective speed is 
double.  
That's sort of gone away with long travel cylinders.  John Deere front end 
loaders 
in the 1940's did this.

Larry Elie


-----Original Message-----
From: Trice, Phillip Coling [mailto:pctrice mgmt purdue edu]
Sent: Thursday, July 01, 2004 3:59 PM
To: Elie, Larry (L.D.); Tim; elec-trak cosmos phy tufts edu
Cc: pctrice purdue edu
Subject: RE: (ET) rear lift


Larry,
        Interesting. I had no idea the actuators had that much power.
Could thy be used with some sort of mechanical advantage (in a crude
way, think of  a block & tackle in reverse)? Say, with a 10:1 advantage,
you would enjoy speeds of 4 in/sec, rather than the stock .4 in/sec.
With an output power of around 50 lbs (allowing for losses in the lock &
tackle), would that be enough to steer the tractor?

        -Phil Trice

-----Original Message-----
From: elec-trak-bounces cosmos phy tufts edu
[mailto:elec-trak-bounces cosmos phy tufts edu] On Behalf Of Elie, Larry
(L.D.)
Sent: Thursday, July 01, 2004 11:40 AM
To: Tim; elec-trak cosmos phy tufts edu
Subject: RE: (ET) rear lift

I have a 24" Von-Weiss actuator.  Yep, 36V.  Slow as molasses.  About 60
sec. full stroke.  
but it would work if you were clever.  You should be able to find these
FREE if you remove 
the old dish for someone.  It must be able to push nearly 1000 lbs.

Larry Elie



-----Original Message-----
From: elec-trak-bounces cosmos phy tufts edu
[mailto:elec-trak-bounces cosmos phy tufts edu]On Behalf Of Tim
Sent: Tuesday, June 29, 2004 7:58 PM
To: elec-trak cosmos phy tufts edu
Subject: Re: (ET) rear lift


C-Band Satellite systems use 18" 24 to 36 volt actuators...maybe they
might
work and I believe they are under $150??.
Tim

----- Original Message ----- 
From: "pieter" <pvcl plitch com>
To: "neil" <wombat dssinternet net>; <elec-trak cosmos phy tufts edu>
Sent: Monday, June 28, 2004 1:37 PM
Subject: Re: (ET) rear lift


> Neil:
> I have been looking into "linear actuators" with the idea of a bucket
> loader in mind.  They are exactly what you described as a screw jack
with
> electric drive. I just bought one for a ski trail groomer I own - has
an
18
> inch lift and a 1000 lifting force.  However, it's only 12 volts.
Lots
are
> offered on e-bay for use in car customizing - like power tailgate
lifts,
> etc.  There are some industrial ones offered in 24 and 36 volt as
> well.  Try a search on the internet using Goggle or some other engine
and
> try the term "linear actuator 36vdc" My 12 volt cost me less than $100
as
> new old stock.  This would be an awkward one to use for a rear lift
because
> it is about 24 inches tall.  However, shorter travel lifts are also
smaller.
>
> At 11:49 AM 6/28/2004, neil wrote:
> >Agree, Larry, that rear lift is not a good design, reworked mine a
few
> >times, is a real grunt with the tiller.
> >
> >Just thinking weirdly, how about using one of those screw type bumper
> >jacks and triving it with a good reduction ( like a worm drive)  ?
> >
> >wombat  _ BTW, I run e20 wheels on my 12, they stick out a bit but
usually
> >the belt slips before the tires.
> >
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> >Elec-trak cosmos phy tufts edu
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>
>
>
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