pantograph forklift

[stefanobruno]

not for this can not be in norm...certo at your home no one comes to control, but we do not confuse not to commit a crime with the impossibility of discovering it. . .

If you do it at your home it is not a crime, you are ..... (to choose the most appropriate term, from jerk to genius ).
I know a guy who made himself a barn for the hawthorn engine, it works, but from there to propose it to someone else it passes.

Bye.

 

[Exatem]

and to conclude ... I repeat that the optimal solution is an electric elevator made to measure, the rest are all hypotheses that at least have too high costs compared to what offers the market.

max.
we have similar problems on board ships (mountains, weapons loading, etc.) and the simplest solution is that proposed. a cheap and reliable electric forklift.

 

[athlon]

Who do you say that?
but you, as a webmaster, how do you deal with hydraulic cylinders and recirculation screws?

passion never sopita for mechanics in general:biggrin::biggrin:

 

[athlon]

You'd be nailed earlier. .
try with an old dresser, those with drawers without ball guides, and try to close it by pushing on one side. . .
you will see a strange phenomenon of impurity, which is not by chance also called "cash effect". ...

But with the appropriate guides I don't think there would be any problems, and I also think that a piston over 3 meters can be a guide.

Yeah, sure. you just have to have 4 motors perfectly synchronized between them:tongue:
which means, 4 engines equipped with their good encoder and 4 inverters that command them, of which one master and the other 3 to do as slave.. .
and that they are all of excellent quality, without Chinese. better if they are vector engines, made specifically to be controlled by inverter
You should hire a slave to take you on your shoulders from one floor to another...

I am a fan of kiss .... other than encoder, inverter etc... chain tour and via:biggrin:

 

[Fulvio Romano]

If you do it at your home it is not a crime, you are ..... (to choose the most appropriate term, from jerk to genius ).
I know a guy who made himself a barn for the hawthorn engine, it works, but from there to propose it to someone else it passes.

Bye.

http://www.google.it/url?sa=t&sourc...6pt6dq&usg=afqjcnezvznun5abrkbsnxi-omlwhihplgpage 14 letter i):
It doesn't matter if you're a jerk or a genius. if you self-build a machine for your own use it must be certified. If you only use it, and you're hurt, you're not gonna report yourself, but if you use it, it's your mother-in-law? ? ?

 

[Fulvio Romano]

But with the appropriate guides, I don't think there would be any problems, and I also think that a piston over 3 meters can be well guided:

Do you want to use a piston for driving? pistons have a spherical joint at both ends. ..who knows why...:redface:

 

[linch]

Do you want to use a piston for driving? pistons have a spherical joint at both ends. ..who knows why...:redface:

to avoid neutral radial loads for seals.

 

[athlon]

:confused

So how does this thing work? ?
http://www.red-srl.com/webgfx/geotermiafig4.jpgThe idea I had for the elevator was exactly what you see in the photo, only with smaller cabin and longer pistons.

 

[linch]

:confused

So how does this thing work? ?
http://www.red-srl.com/webgfx/geotermiafig4.jpg

because the piston does not act as a guide, but only lifts through a joint in the head for the above reasons.

 

[athlon]

You mean, if I push the truck sideways, it moves?

In theory if the pistons have spherical snodes the two pistons, the body of the truck and the ground should form a deformable parallelgram.

However, returning to origin, how come the trucks are used to lift up with 4 pistons and instead a lift would be so complicated?

the idea that I initially had was practically what you see in the photo (obviously removing the truck :biggrin: ) simply with a cabin of about 1,20x1,20x3,50 and four 4-metre pistons placed at the corners of the cabin


I'm in bed with a sore throat and fever, so I'm sorry if I give free rein to my strongest ideas. )

 

[MBT]

It doesn't matter if you're a jerk or a genius. if you self-build a machine for your own use it must be certified. If you only use it, and you're hurt, you're not gonna report yourself, but if you use it, it's your mother-in-law? ? ?

a nice comparison is this...
you at your home are free to cook pasta also in the garbage can. It's your business and no one will tell you anything
But...
Even if you do it at your house, but you invite someone to lunch, and that's what a gastroenteritis calls you.

on the elevator the principle is the same
you can also fix the cabin to a carrucola with a 300 kg bore to the other end of the rope
but if a friend of yours comes to see you and the rock comes to him, he'll report you.

do vobis...

So how does this thing work? ?

The idea I had for the elevator was exactly what you see in the photo, only with smaller cabin and longer pistons.

bhe, there is a certain difference
not of concept, but of proportions!

You mean, if I push the truck sideways, it moves?

In theory if the pistons have spherical snodes the two pistons, the body of the truck and the ground should form a deformable parallelgram.

However, returning to origin, how come the trucks are used to lift up with 4 pistons and instead a lift would be so complicated?

the idea that I initially had was practically what you see in the photo (obviously removing the truck: ) simply with a cabin of about 1,20x1,20x3,50 and four 4-metre pistons placed at the corners of the cabin


I'm in bed with a sore throat and fever, so I'm sorry if I give free rein to my strongest ideas. )

bhe, we understand the sore throat, but vented with healthy New Year's sex:tongue:

we say that it does not move
in fact the 4 cylinders of the truck are not articulated where they connect to the structure of the vehicle, and in fact they catch all the side thrust that you, or who for you, apply to the truck
But there is to say that the cylinders in question are reinforced and guided, more than a normal cylinder
and we can afford this because the race is all contained, let's say a low meter
well different from making the same reasoning on a cylinder with race 4 meters.. .

If you like automotive examples, look at the suspension of your car.
Why are there fior fior of arms and arms and does not connect the shock directly to the hub?
because the anterior forks of the motorcycle, which work with the same principle of the "your" mountain, have the nice tendency to bend when you take a hole or a sidewalk (to which the driving is bounced forward... )

 

[sampom]

....
However, returning to origin, why is it used on trucks to pick up 4 pistons and instead for an elevator it would be so complicated? . .

ossrvalo well in operation, when the pistons parade; You'll notice that the vehicle gets up a bit on one side and a little on the other.. In fact, the controls are independent, to allow leveling on land not in the plane.
do not go up and down to the unison moving the truck parallel to the ground as an elevator.

greetings and good year
Marco:smile:

 

[linch]

a nice comparison is this...
you at your home are free to cook pasta also in the garbage can. It's your business and no one will tell you anything
But...
Even if you do it at your house, but you invite someone to lunch, and that's what a gastroenteritis calls you.

on the elevator the principle is the same
you can also fix the cabin to a carrucola with a 300 kg bore to the other end of the rope
but if a friend of yours comes to see you and the rock comes to him, he'll report you.

do vobis...


bhe, there is a certain difference
not of concept, but of proportions!


bhe, we understand the sore throat, but vented with healthy New Year's sex:tongue:

we say that it does not move
in fact the 4 cylinders of the truck are not articulated where they connect to the structure of the vehicle, and in fact they catch all the side thrust that you, or who for you, apply to the truck
But there is to say that the cylinders in question are reinforced and guided, more than a normal cylinder
and we can afford this because the race is all contained, let's say a low meter
well different from making the same reasoning on a cylinder with race 4 meters.. .

I guarantee that if those cylinders didn't have at least one snout, they would last very little, maybe the space of a day.
I've seen tratruding hydraulic cylinders with 100 mm order runs, because of a radial component.

 

[Fulvio Romano]

a nice comparison is this...
you at your home are free to cook pasta also in the garbage can. It's your business and no one will tell you anything
But...
Even if you do it at your house, but you invite someone to lunch, and that's what a gastroenteritis calls you.

the comparison fits, however there is another difference. haccp does not apply (at least I believe) to home kitchens, the dm also applies to machines built in garage.

 

[Er Presidente]

You mean, if I push the truck sideways, it moves?

si

In theory if the pistons have spherical snodes the two pistons, the body of the truck and the ground should form a deformable parallelgram.

Yes, in fact the snodes are only at one end of the cylinder.

However, returning to origin, how come the trucks are used to lift up with 4 pistons and instead a lift would be so complicated?

Because the truck is not required to sync.

the idea that I initially had was practically what you see in the photo (obviously removing the truck :biggrin: ) simply with a cabin of about 1,20x1,20x3,50 and four 4-metre pistons placed at the corners of the cabin

If you do it without guides it works, put four pistons with a nice joint in the head and you are fine.
it will go all wrong but in the end it will spy on the right level.
Try to put on some pretty rugged balustrades though.

I'm in bed with a sore throat and fever, so I'm sorry if I give free rein to my strongest ideas. )

But never!
You could do it better if you keep the "camion" philosophy.
as you have noticed the truck has the two cylinders only, because it is the back axle that does as a "guide" with its springs (if a cylinder rises too much, automatically the crossbows spend the weight on him and the "calm".
However, if you want synchronization, just enter proportional valves and sensors on the stems.
Who knows why hydraulic lifts on one floor, though, use only one central cylinder and four guides.

 

[vale61]

... for what I see around my parts (monza brianza) it seems that for the greater they go precisely the lifts (like what I described earlier) with the side hydraulic piston that through a carrucola keeps the rope in tension, I think that under wire floor only go for about 80-100 cm.


in my company 30 years ago they were mounted with central piston (high holes), it was necessary to do the "hole" under the floor to receive the piston for all its length and large enough to receive the "maintainer".

Bye-bye.

ps: by the way, one day, when I observed the assembly of one of these lifts, I realized that with the "carrucola system" double the piston stroke...

 

[scalva]

... hello.

ps: by the way, one day, when I observed the assembly of one of these lifts, I realized that with the "carrucola system" double the piston stroke...

exact
like the mule
but halve the thrust

 

[scalva]

I guarantee that if those cylinders didn't have at least one snout, they would last very little, maybe the space of a day.
I've seen tratruding hydraulic cylinders with 100 mm order runs, because of a radial component.

the stabilizers of the means have no snout because they run small

due to this are subject to several maintenance

 

[Fulvio Romano]

exact
like the mule
but halve the thrust

Right, but for a hydraulic cylinder the push is not a problem. the race much more.
Perhaps, by the method of the carrucola you can also make sure that you pull instead of pushing? so you also avoid instability?

 

[scalva]

With the forklift system I think you can do enough just from the technical point of view.
most hydraulic lifts are made so
seen the carirchi and the race would suffice a cylinder with only 2 well sized guides (the cylinder only has to push not drive)
as regards costs, safety and aesthetics, however, it becomes + difficult to assess