180¦ Air Powered Hinge Assembly 4

[engjeff]

My problem is the one beam has to flip on top using some sort of air or air/hydraulic a full 180° and then come back extended.

-The point of rotation is above the two beams
-when flipped the cylinder can not extend past the end of
the assembly. The point of flipping is to save length
for transport.
-The total weight of the extend moving part is 3,000#'s
distributed.

My question is what should I use for force, the beam can not slam up and down it may kill someone if it does. I have 120psi of air in that location and customer requires it be air powered.

What location should the points be to make the assembly rotate using a non cycling cylinder. As in when extended it must be flipped on top and when retracted it must be extended.

Thank you,

Jeff

 

[hydtools]

For added safety you might consider a pressurize-to-release brake.

Ted

 

[SnTMan]

handleman, exactly, the worm drive can easily be self holding. No brakes, etc, required. You got air it runs, you don't, it stays put. Add a provision for a crank, the beam can be deployed without any external power.

Regards,

Mike

 

[engjeff]

I have been thinking about this day and night, what if we could get about 2500psi of hydraulic force back there. Would dual hydraulic motors work?

If so where could I get ones powerful enough yet inexpensive?

The worm gear with a crank back up how would you go about that? Tie the crank right into the gear as well?

 

[GregLocock]

"I have 120psi of air in that location and customer requires it be air powered. "



Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[SnTMan]

engjeff, I'm not a machine design guy and am possibly over my head already, but you could drive the air motor shaft if accessible or the worm shaft with a crank, or even a rachet wrench. Square drive, hex or whatever is convenient.

I believe I have exhausted my expertise on this subject.

Regards,

Mike