Turning a system by 90º 3

[drodrig]

Hi there,

We have a load on a plate we want to turn by 90º. What is the best way to do this?

I thought about using gears. Here the general idea:

We have this grey plate in horizontal position:

We mount the load on the top (just a block to simplify the representation):

We attache four supporting plates (in blue) on the original plate to get closer to the center of gravity:

A frame (in pink) around the system connecting all blue plates is placed:

Two stands (in transparent colour) are installed:

Then comes a pillow block bearing on the stand and a spur gear which is attached to the pink frame (there was a square hole). The shaft is in the center of gravity

And finally a small gear with a cranked handle on the stand:

I didn't calculate anything yet. First validating the idea, this is the easiest way I came up with to turn this

What do you think?

 

[RRiver]

1. What is the box made of?
2. What's the structural integrity of the box?
3. Will the "rotation" of the box result in a permanent reorientation of the box? If not, how often is it rotated?
4. How much space do you have?
5. Is power available?
6. Is this for mobility or to be permanently located?
7. What is the weight distribution within your box?
8. What the heck is this for? You're awfully cryptic.

Yes I see that some of this got answered.

What you have acknowledged:

1. heterogeneous load that's delicate. sensitive maybe?
2. Box stays in place but is carefully rotated 90 degrees once a year.
3. Box that maintains the same position and contents for years. A box with an obvious CoM, consistent contents and all with a known rotation "pattern" of only 90 degrees and still you are unsure of calculating a CoG.
4. A necessary plate because of what's under the plate.
5. A consistent rotating angle for the box, money is no object and yet the obvious of designing a self centering axle in to the box apparently isn't feasible.
6. An estimated box weight of only 1 ton. A weight that can easily and reliably be dealt with magnets on a not difficult to design or fabricate 4 corner frame for each side of the box. 8, 400 kg hand actuated lift magnets with a 70 to 80% factor for safety, $700? Fabrication meatal, $200? It only weighs a ton. If properly balanced a $20, hydraulic car jack would easily lift the box. Delicate contents usually have a value to consider. Especially one that apparently changes weight at an unknown rate over time in a controlled environment.. Given this, the entire process described and delicate, could be wrong but I'd guess there's chemists on hand.
7. Again, cryptic and money's no object.

Maybe it's just me but it all seems a bit odd.