Mechanical Lift - Ideas - Rotary Mechanical Actuator
Mechanical Lift - Ideas - Rotary Mechanical Actuator
(OP)
Hey all, I'm looking for ideas on building a test fixture for an actuator we're building. In a nutshell, I need to rotate the actuator 180 deg. and lift approx. 4000lbs. I'm trying to think of ways to run it up and then down and then switch the side of the load. In other words when I rotate it clockwise I'll lift 4000lbs, then run counter clockwise down resisting 4000lbs but continue on with the counter clockwise motion for it to travel back up lifting the 4000lb load on the "other side" of the actuator planetary set and then repeat the process.
Please ask questions. I'm sure that didn't give anyone a clear picture but I'm open to any and all ideas.
Thanks for any insight.
Please ask questions. I'm sure that didn't give anyone a clear picture but I'm open to any and all ideas.
Thanks for any insight.





RE: Mechanical Lift - Ideas - Rotary Mechanical Actuator
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RE: Mechanical Lift - Ideas - Rotary Mechanical Actuator
RE: Mechanical Lift - Ideas - Rotary Mechanical Actuator
RE: Mechanical Lift - Ideas - Rotary Mechanical Actuator
RE: Mechanical Lift - Ideas - Rotary Mechanical Actuator
RE: Mechanical Lift - Ideas - Rotary Mechanical Actuator
RE: Mechanical Lift - Ideas - Rotary Mechanical Actuator
RE: Mechanical Lift - Ideas - Rotary Mechanical Actuator
Suspend a weight from the distal end of the crank by means of a chain.
Put a limit switch at TDC of crank travel.
If that's too imprecise, add a sprocket to the output shaft and let it drive a larger sprocket on a jackshaft, where you can position any number of switches or position transducers and go nuts with control and monitoring logic.
Mike Halloran
Pembroke Pines, FL, USA
RE: Mechanical Lift - Ideas - Rotary Mechanical Actuator
I did something similar once - numbers were bigger but what we did was just made a part that fit into the piece of equipment and poured a concrete brick of appropriate size to get the weight we wanted.
I hope the gearbox you have for this is a wormgear for its inherent inability to backdrive itself.
As far as testing if it works - pickup and setdown points are your highest torque but controls wise if you do this with hydraulics visa 40bar linkage the tricky spot is going from lifting to lowering.
I have no affilation but there is a great hydraulic rotary actuator that can replace a lot of linkage and/or gear boxes made by Helac out of Enumclaw Washington.
RE: Mechanical Lift - Ideas - Rotary Mechanical Actuator
RE: Mechanical Lift - Ideas - Rotary Mechanical Actuator
Any thoughts?
Thanks for the ideas so far!