Screw 3-stage telescopic actuator

Input: yellow screw.
Green slider has the green nut that together with the input screw create the first screw-nut drive.
Pink slider of inner thread and the orange screw create the second screw-nut drive.
Jade slider of inner thread and the beige screw create the third screw-nut drive.
The revolution joint (two blue pins and the circular groove on the green nut) allows the beige screw to rotate together the orange screw and move axially together with the green slider.
The revolution joint (two blue pins and the circular groove on the pink nut) allows the orange screw to rotate together the beige screw and move axially together with the pink slider.
The first, second and third screw-nut drives have leads of L1, L2 and L3 mm of the same hand. If the input screw rotates N revolutions, the pink slider performs a displacement of N*(L1+L2+L3) mm.
Assembly instruction:

STEP files of this video:
Inventor files of this video:

[va]

This has many applications in robotics ! Many many thanks for sharing your designs to the general population free of charge. This is charity of the highest order.

[rohankashyap]

You are incredible... I agree with one of the comments... This is charity for many...your designs compel to think something new...

[xmenxwk]

machining this will be pain in the ass

[donovangibson]

Splined threads... Now there's something I haven't seen in a loooong time.

[JGambrosia]

351 thousand subscribers isn’t enough. You need 351 million subscribers. This is not fair.

[minercraftal]

Little hard for me to understand how it can rotate out evenly.
Took a while to find out, the revolution is blocked to rotate at the same time, so each step is threading out by the same ratio. And the thread base is separate by each step, so depend on each base, each of the step comes out evenly then.
Nice complex!

[engineeringmeka]

Con luôn dõi theo các video tải lên của bác. Thật tuyệt vời, con cảm ơn bác

[envitech]

Pretty ingenious!!! For those who may not realise, the word engineer has nothing to do with engines. It was derived from the French ingenieur which means genius in English, or at least that's what I was taught when I was a young engineering student.

[jkcc]

Wow! I just brought one a week ago and dissected it to make sure how it works!

[bertrandmarion]

Wonderful work !
I’ve a challenged for you
Would you be able to do a mechanism like
This one but!
When the three different module have reach their full extension
The pink one or the blue one start to roll in order to be the screw of a scissor jack to act like an anchor dowel

[ethaneveraldo]

Interesting idea, but looks very difficult to machine. Ease of manufacturing is important when conceiving a mechanism.

[RenatoMontandondeLima]

Dear,
I am a professor of Technical Mechanical Drawing and a follower of your channel. I would like to know if it is possible to make the drawings available to be used in my classes. Thanks.

[Fillkids]

Hello master, how are you?
I'm printing these pieces with 7 sizes to have a greater reach. I have a question should I print all the pieces in half and then glue the two sides together or can I print with one size and just fit them all together?

[senatuspopulusqueromanus]

Is it possible to use this kind of actuator in humanoid robot arm? I'm not an engineer, but I'm trying to model a semi-realistic steampunk robot, so I need to know about actuators that could possibly be used in this kind of machines

[jasemali]

This is amazing, now how can it be modified to have a reciprocating and fast action ?

[davidschwartz]

What is the estimated life cycles in an industrial environment

[wicmontana]

Thank you for the awesome work. What is the thread on them to push them out at the same time. Is it 1 to 1 thread size.?
Like M10 bolt and nuts size or do they change from M6 to M8 to M10 etc.

[sumairrafique]

Can we Extend this system to 60 feet hight for the telescopic Mast, and can you please suggest which pipes will be feasible along with material s this project,

[GHOST]

If it was put into a lightsaber design it would look wizard.😁

[camnguyen]

Hi anh, cho em hỏi, cái trục màu cam nó đang tự do không chịu tác động của trục màu vàng làm sao có thể xoay được ạ, mong anh giải thích với