Screw 2-stage telescopic actuator 1

Input: yellow shaft.
Pink tube has a prismatic joint with the input shaft, a helical joint with the grey base (the first screw-nut drive), a helical joint with green center screw (the second screw-nut drive) and a revolution joint with the orange tube. The latter has a prismatic joint with the base.
The green tube fixed to the center screw has a prismatic joint with the orange tube.
The first screw-nut drive is of right hand thread, L1 mm lead.
The second screw-nut drive is of left hand thread, L2 mm lead.
If the input shaft rotates N revolutions, the green slider performs a displacement of N*(L1+L2) mm.
This video was made based on US patent US8220349.
STEP files of this video:
www.mediafire....
Inventor files of this video:
www.mediafire....

[@wicmontana700]

Thank you for the great work and taking the time to do it.

[@adambergendorff2702]

So simple , so amazing!!! thanks for posting

[@user-rv1qb1oi8u]

also great work

[@40watt53]

nice

[@sprezzaturarrd]

How would you compute the axial force by the green slider from the motor torque driving the yellow slider?

[@danistem]

i downloaded the step files, in cad only half of the model appears..if i print it as a half will it still work?? great work tysm for sharing

[@thang010146]

No. It can't work. The files are not ready for 3D printing.
You have to redesign the model.

[@pok1111]

very nice! Is it possible to share the STEP files? Thanks

[@thang010146]

Link to download the STEP files has been added to the video description recently.

[@ahmetakyasan3536]

why do not it open