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12V Push Mechanism

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TonyMat

Mechanical
Jun 15, 2015
9
I am in need of a 12V DC device that can push with at least 6 pounds of force.

Does anyone have ideas on the cheapest way to accomplish this?

Greatly appreciate any input.
 
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Thank you.

Do you know of any push type solenoids that would provide this type of force?
 
Over what stroke/speed do you require that force? What current at 12V is available?

Solenoids have narrow strokes of peak force.
Voice coil actuators will have more liner force profile but are expensive.
Linear actuators usually compise motor with lead screw or rack and pinion are slower and longer but can give even push force over long range. Probably too big.
 
The speed is not a concern; the current that is available is from 8 AA batteries.

 
Well, for how long does it need to push?

TTFN
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Hi Tony

Can you tell us anymore about the application in one post?

“Do not worry about your problems with mathematics, I assure you mine are far greater.” Albert Einstein
 
I would go with a lead screw approach, since the force can be defined by the lead pitch and motor speed

TTFN
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There is a homework forum hosted by engineering.com:
 
The application is to remotely activate a pressurized can of paint. The push force must be 6 pounds, the mechanism must travel 8mm and hold for only .5 second.
 
I think your AA batteries will be too small (at least for 12 volt solenoids). Make sure to check that with whatever device you end up with.
 
I am considering AA batteries because they are cheap; do you have a better idea on a different type of DC supply?
 
The amount of work done and mechanical power required is relatively trivial, 0.2J and 0.4W.

8 cheap NiMH batteries contain 43200J, so it's just a question of making the energy do the useful work.


Something like this would work for the actuator:

TTFN
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7ofakss

Need help writing a question or understanding a reply? forum1529


Of course I can. I can do anything. I can do absolutely anything. I'm an expert!
There is a homework forum hosted by engineering.com:
 
How is it physically actuated? Could you use a spring in between the (valve?) and actuator that is preloaded with 5 lbs of force, so the actuator only needs to supply 1 lb? Only mentioning this because you asked for the cheapest way.
 
Gear motor and over-center linkage. It gives the maximum push at the maximum displacement without over-doing it and requires little power to hold open. Because it can have the greatest amplification (less leverage) at the start it can move rather quickly.

6 pounds seems high, but that's based on all the pressurized cans of paint I've come into contact with.
 
IRstuff (Aerospace)16 Jun 15 06:27
I would go with a lead screw approach, since the force can be defined by the lead pitch and motor speed


IRstuff: Do you mean a stepper motor linear actuator?
 
Solenoid has the advantage of on-off electrical operation. Motor solutions need to be driven "ON" and driven "OFF".

je suis charlie
 
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