Author |
Message |
DaBraink Samba Member
Joined: August 12, 2005 Posts: 172
|
Posted: Sat Jun 25, 2016 7:40 pm Post subject: Fulcrum type floor jack |
|
|
Is this a factory VW jack? If so was one made for busses?
_________________ If it ain't broke.................find something else to fix.
There's never enough time to do things right, but always enough time to do them over. |
|
Back to top |
|
|
mandraks Samba Member
Joined: November 28, 2004 Posts: 7047 Location: Lawrenceville, Ga
|
Posted: Sat Jun 25, 2016 8:19 pm Post subject: Re: Fulcrum type floor jack |
|
|
interesting piece, never seen one _________________ regards
Uli
----------------------------------------
'53 3-Fold Oval, L35 Metallic Blue, looking for a narrow hatch panel |
|
Back to top |
|
|
Malokin Martin Samba Member
Joined: August 19, 2007 Posts: 3099 Location: E-burg
|
Posted: Sat Jun 25, 2016 9:37 pm Post subject: Re: Fulcrum type floor jack |
|
|
Oh man I want one of those |
|
Back to top |
|
|
easy e Samba Member
Joined: May 28, 2008 Posts: 3931 Location: 1 hr north of Santa Barbara
|
Posted: Sat Jun 25, 2016 10:44 pm Post subject: Re: Fulcrum type floor jack |
|
|
Maybe that was the one used before they decided it might be better to have one that would stow easier.... and impress Archimedes a little more.
I'm sure you could make one for a bus... might be a little cumbersome.
"Give me a lever long enough and a fulcrum on which to place it, and I shall move the world." _________________ aka: Evan
Spreadsheet for Bus RPM, based on gearing & tire size (Excel format)
Searchable, click-navigable 1958 Bus Parts List |
|
Back to top |
|
|
DaBraink Samba Member
Joined: August 12, 2005 Posts: 172
|
Posted: Sat Jun 25, 2016 11:03 pm Post subject: Re: Fulcrum type floor jack |
|
|
It would be hard to carry around but really quick to use.
I wonder if this was used at the factory and also what the opening at the top was for, a tie down? _________________ If it ain't broke.................find something else to fix.
There's never enough time to do things right, but always enough time to do them over. |
|
Back to top |
|
|
BarryL Samba Member
Joined: November 01, 2004 Posts: 14257 Location: Casa de Oro, California
|
Posted: Sun Jun 26, 2016 9:27 am Post subject: Re: Fulcrum type floor jack |
|
|
Ahem...that replaced the harpoon...nothing VW; you ought to see the pole and reel. |
|
Back to top |
|
|
DaBraink Samba Member
Joined: August 12, 2005 Posts: 172
|
Posted: Sun Jun 26, 2016 2:08 pm Post subject: Re: Fulcrum type floor jack |
|
|
The reason it appears to be a tool is the end nearest the vehicle has what appears to be a rod going into the jack point. That, with its length, would suggest it could be used to lift the vehicle. _________________ If it ain't broke.................find something else to fix.
There's never enough time to do things right, but always enough time to do them over. |
|
Back to top |
|
|
nlorntson Crazy VW Lady
Joined: March 13, 2004 Posts: 3783 Location: Twin Cities, MN
|
Posted: Sun Jun 26, 2016 2:50 pm Post subject: Re: Fulcrum type floor jack |
|
|
I think that would only work on a car with the round jack hole like a KDF or very early beetle?
Would be slick for a quick tire change or valve adjustment |
|
Back to top |
|
|
EverettB Administrator
Joined: April 11, 2000 Posts: 69802 Location: Phoenix Metro
|
Posted: Sun Jun 26, 2016 9:57 pm Post subject: Re: Fulcrum type floor jack |
|
|
I'm curious what sort of force would be needed to lift the vehicle.
I'm no fulcrum expert but if you need 1000 lbs. of force and that long arm is 5' and the short one is 1' it looks like 200 lbs of force.
That seems a bit high for a normal user so maybe my math is off.
Or it's not 1000 lbs of lift needed. _________________ How to Post Photos
Everett Barnes - [email protected] | My wanted ads
"Water is the only drink for a wise man" | "Communication prevents complaints"
Stop dead photo links! Post your photos to The Samba Gallery! |
|
Back to top |
|
|
velvetgreen Samba Member
Joined: August 17, 2004 Posts: 2744 Location: Canada
|
Posted: Mon Jun 27, 2016 6:04 am Post subject: Re: Fulcrum type floor jack |
|
|
well if it isn't a jack then it sure could double for braking by being used as an anchor. storing it in the vehicle might be a issue however |
|
Back to top |
|
|
easy e Samba Member
Joined: May 28, 2008 Posts: 3931 Location: 1 hr north of Santa Barbara
|
Posted: Mon Jun 27, 2016 6:18 am Post subject: Re: Fulcrum type floor jack |
|
|
EverettB wrote: |
I'm no fulcrum expert but if you need 1000 lbs. of force and that long arm is 5' and the short one is 1' it looks like 200 lbs of force.
That seems a bit high for a normal user. |
Maybe not an expert, but you're correct.
In general the effort force can be expressed as
Fe = Fl (dl / de)
where
Fe = effort force (what we're solving for)
Fl = load force (say 1,000 lb)
dl = distance from load force to fulcrum (say 1 ft)
de = distance from effort force to fulcrum (say 5 ft) _________________ aka: Evan
Spreadsheet for Bus RPM, based on gearing & tire size (Excel format)
Searchable, click-navigable 1958 Bus Parts List |
|
Back to top |
|
|
Abscate Samba Member
Joined: October 05, 2014 Posts: 22639 Location: NYC/Upstate/ROW
|
Posted: Mon Jun 27, 2016 7:38 am Post subject: Re: Fulcrum type floor jack |
|
|
The mechanical advantage on that puppy is more like 8-10:1, so you would only need about 80 pound force on that lever to lift a 1800 pound curb weight VW.
The eye at the top is to store it on its hook on the wall, of course. _________________ .ssS! |
|
Back to top |
|
|
MrPolak Samba Member
Joined: June 20, 2004 Posts: 1337 Location: AG ,atnaltA
|
Posted: Mon Jun 27, 2016 7:42 am Post subject: Re: Fulcrum type floor jack |
|
|
easy e wrote: |
EverettB wrote: |
I'm no fulcrum expert but if you need 1000 lbs. of force and that long arm is 5' and the short one is 1' it looks like 200 lbs of force.
That seems a bit high for a normal user. |
Maybe not an expert, but you're correct.
In general the effort force can be expressed as
Fe = Fl (dl / de)
where
Fe = effort force (what we're solving for)
Fl = load force (say 1,000 lb)
dl = distance from load force to fulcrum (say 1 ft)
de = distance from effort force to fulcrum (say 5 ft) |
You need to use the ratio of distance of the lever pull to the distance the jack point moves. In this case the mechanical advantage is rather high since the car moves vertically only a small distance. |
|
Back to top |
|
|
Clara Samba Member
Joined: June 14, 2003 Posts: 12399
|
Posted: Mon Jun 27, 2016 7:46 am Post subject: Re: Fulcrum type floor jack |
|
|
Abscate wrote: |
The mechanical advantage on that puppy is more like 8-10:1, so you would only need about 80 pound force on that lever to lift a 1800 pound curb weight VW.
The eye at the top is to store it on its hook on the wall, of course. |
And you are not lifting the entire bug, but just one side.
I think a square peg goes in the jack point, the peg pivots in the tool.
Useful tool for an emergency vehicle come to change a tire. _________________ The Obsolete Air-Cooled Documentation Project http://oacdp.org/ |
|
Back to top |
|
|
Malokin Martin Samba Member
Joined: August 19, 2007 Posts: 3099 Location: E-burg
|
Posted: Mon Jun 27, 2016 8:10 am Post subject: Re: Fulcrum type floor jack |
|
|
It really seems like it would need more of a nub (height) if it was meant to switch out a tire though... |
|
Back to top |
|
|
Col_Forbin Samba Member
Joined: November 25, 2011 Posts: 84 Location: Austin, Texas
|
|
Back to top |
|
|
EverettB Administrator
Joined: April 11, 2000 Posts: 69802 Location: Phoenix Metro
|
Posted: Mon Jun 27, 2016 9:38 am Post subject: Re: Fulcrum type floor jack |
|
|
Malokin Martin wrote: |
It really seems like it would need more of a nub (height) if it was meant to switch out a tire though... |
I was thinking that too but maybe you are supposed to double pivot it until the long arm is on the ground and you stand on it to hold it in place.
I think it might be high enough at that point. _________________ How to Post Photos
Everett Barnes - [email protected] | My wanted ads
"Water is the only drink for a wise man" | "Communication prevents complaints"
Stop dead photo links! Post your photos to The Samba Gallery! |
|
Back to top |
|
|
busdaddy Samba Member
Joined: February 12, 2004 Posts: 51121 Location: Surrey B.C. Canada, but thinking of Ukraine
|
Posted: Mon Jun 27, 2016 10:02 am Post subject: Re: Fulcrum type floor jack |
|
|
Maybe it's not for tire changes, it could be for shifting the car sideways in tight garages, or getting out after some ass traps you in between other parked cars.
Looks like alot of other big prybars for moving frieght employed in the pre forklift days, but more specialized for a specific use. _________________ Rust NEVER sleeps and stock never goes out of style.
Please don't PM technical questions, ask your problem in public so everyone can play along. If you think it's too stupid post it here
Stop dead photo links! Post your photos to The Samba Gallery!
Слава Україні! |
|
Back to top |
|
|
Who.Me? Samba Member
Joined: July 14, 2014 Posts: 2204 Location: UK (South)
|
Posted: Mon Jun 27, 2016 11:55 am Post subject: Re: Fulcrum type floor jack |
|
|
Not saying whether it's a jack or not, but for what it's worth, F1 teams employ quick lift lever-type jacks for tyre changes during races. Different shape, same premise...
_________________ Andy
Looking for info on my truck's history. Are you from Campbell California or nearby. Do you recognise it? ... http://www.thesamba.com/vw/forum/viewtopic.php?t=636786 |
|
Back to top |
|
|
easy e Samba Member
Joined: May 28, 2008 Posts: 3931 Location: 1 hr north of Santa Barbara
|
Posted: Mon Jun 27, 2016 12:22 pm Post subject: Re: Fulcrum type floor jack |
|
|
MrPolak wrote: |
You need to use the ratio of distance of the lever pull to the distance the jack point moves. In this case the mechanical advantage is rather high since the car moves vertically only a small distance. |
Is this better... (Beetle is 4'-11" high)
_________________ aka: Evan
Spreadsheet for Bus RPM, based on gearing & tire size (Excel format)
Searchable, click-navigable 1958 Bus Parts List |
|
Back to top |
|
|
|