Motor with lead screw - suggestions?
Motor with lead screw - suggestions?
(OP)
I am currently designing a mechanism which uses a leadscrew to drive apart two apposing arms. The leadscrew is the output shaft of a geared valeo motor unit. I think it is normally used as a seat adjuster in cars. Although this motor is fairly torquey, is begins to struggle as I increase the load on the mechanism. Does anyone know of another motor with an integral lead screw (I’ve become fairly attached to this motor/leadscrew combo) that has a high torque motor / output. I'm attempting to lift around 3000N; my current motor has a rating of 6Nm starting torque. I'm looking for a DC motor (12V - 24V). Any help would be appreciated as I'm running out of ideas.





RE: Motor with lead screw - suggestions?
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RE: Motor with lead screw - suggestions?
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RE: Motor with lead screw - suggestions?
RE: Motor with lead screw - suggestions?
Barry1961
RE: Motor with lead screw - suggestions?
RE: Motor with lead screw - suggestions?
Really not sure they would suit your application but throwing it out there
Dave
RE: Motor with lead screw - suggestions?
Just taking a wild guess you would need around a 900:1 reduction with a 50mm pinion. It would of course have to be a brake motor since the efficiency would be high. Brother makes some very small, high torque gearmotors but not using DC motors.
http://www.brother-usa.com/gearmotors/
I have done 12VDC applications in the past using converters which you can get for around $30.
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Barry1961
RE: Motor with lead screw - suggestions?
RE: Motor with lead screw - suggestions?
RE: Motor with lead screw - suggestions?
RE: Motor with lead screw - suggestions?
In addition to the excellent source posted by Unclesyd,
you might look at http://www.duffnorton.com. They also have free catalogs that are chocked full good eng. applic. data.
If you are attached to using the units that you have on hand, (acceptable closed length, acceptable cost) then try using two of them in parallel. This should take care of zekeman's mech. load concerns as well.
Your gas spring idea has merit, even if it does not have the optimum stroke/closed length aspect. Map your thrust required vs. stroke, and see if the gas spring will help you over the high thrust portion of the stroke with the remainder born by the original actuator alone.
RE: Motor with lead screw - suggestions?
RE: Motor with lead screw - suggestions?
http://www.burractuators.com/index.html
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I have sone literature on a troidal motor as mentioned by djw2k3 if I can find it. If my memory is working these actuators were very expensive.