Quick and Easy "electric Linear Actuator" Prototype ...





Introduction: Quick and Easy "electric Linear Actuator" Prototype ...

Do you know hydraulic cylinders (aka hydraulic motors) ?
Well, this slideshow is about an electric "counterpart" prototype, which use a DC motor, a bolt & nut, and an aluminium cylinder.

There is no casing, and no mean to prevent the cylinder from rotating yet ... but that's just a prototype ...

PS : thanks to Gmoon and Proteus who told me how it was actually called in English. =o)



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    nice one ..thanks dude

    To keep it from rotating, I epoxied another, much smaller diameter tube alongside the long tube. I then cut out a single piece of square plywood, and drilled two different-sized holes next to each other in the wood to accept the two glued-together cylinders. I lubed the assembly with a small amount of petroleum jelly. It lubes the parts, but the keeps the wood from swelling. I intend to use this as a simple "latch" to keep a door from opening when it shouldn't. Thanks to the original poster for a great idea. It got me "over the hump" on this project.

    Excellent, simple idea. I have a bit of a different application that is similar that you might enjoy. See http://www.youtube.com/watch?v=GmC4WoLkvBs&feature=youtu.be

    this is ingenious.

    Very cool!

    If you connect the tube to the motor, you can use the bolt head as a mounting point.

    thank you! this was so helpful, now my next problem, how to make it retract without reversing its turn?

    this is brilliant and had given me the idea to build my own one, slightly larger, i will be welding to my motor shaft so that should hold it nicely.

    It's sort of a linear worm drive. I can see this getting used in Hallowe'en animatronics. The glueing is a weak-point, though - it might shear under a load. The motor's pulley and the head of the bolt might need keyed together somehow.