LEGO 4 Speed Linear Gearbox, 2 Outputs
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- เผยแพร่เมื่อ 2 มี.ค. 2012
- A design for a four speed gearbox, with two output axles - one for drive, and the other for PTO (power take-off) to power a winch or other mechanism.
When the drive motor is spinning the gear change is very smooth, and can be controlled by a single LEGO motor. There is only a small position between each gear when the gearbox is in neutral.
PTO gear (far right) = 2.083 : 1
1st gear (centre right) = 1.667 : 1
2nd gear (centre left) = 1.000 : 1
3rd gear (far left) = 0.600 : 1
Extra gears could be added to get a five speed gearbox (or more), with the only limitation being the length of the axle supporting the worm gears and the two axles on the sides that allow the gear selector to slide back and forwards.
One problem with the current design is that there is a little bit too much play in the sliding mechanism, and this causes the gears to jump and grind when the outputs are under load.
More information can be found in this forum post:
www.eurobricks.com/forum/inde...
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This model is not an official LEGO set.
This model is not for sale.
I do not have building instructions for this model.
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LEGO® is a trademark of the LEGO Group of companies which does not sponsor, authorize or endorse this video. - วิทยาศาสตร์และเทคโนโลยี
Check out my other Lego Technic Gearboxes!
Lego Technic Smooth Linear Gearbox: th-cam.com/video/CBBlflmi41U/w-d-xo.html
Lego Technic Gearboxes Playlist: th-cam.com/play/PLY5_lYb67lhEjV5oLJJpMovte_PSSN6Ma.html
excuse me, I currently was wondering if you can provide me the technical information for the making of gears or something like that? I mean, a web page, or a manual of instructions, etc.?
thnk u
If you want a good introduction to Lego Technic in general, then I recommend the book "Unofficial LEGO Technic Builder's Guide" (nostarch.com/technicbuilder2).
If you want more information about Lego Technic gearboxes in particular, then I recommend looking at videos on TH-cam or reading some forums. For example: www.eurobricks.com/forum/index.php?/forums/topic/150313-gearbox-collection-thread/
Most of the larger Lego Technic sets include some sort of gearbox, and you can download the instructions for these sets from the Lego website: www.lego.com/en-au/service/buildinginstructions
Apart from that, sometimes it is just a matter of getting your hands on some Lego pieces and trying things out.
S. L. Froden can you try to make instructions.
+Preston Gravy - I'm sorry, I made this gearbox over six years ago, and I haven't made instructions for it in all that time. While I won't say that I will never make instructions for it, I won't be making them anytime soon.
This gearbox is a proof-of-concept, and as such it demonstrates an interesting mechanism, but ultimately I consider it a failure. Under load, the gears start to slip and grind. I don't want you (or others) to ruin your Lego gears. I would rather that you take my original concept and adapt it to your needs to make your own gearbox.
I made a much better gearbox (which I did make plans for) here: th-cam.com/video/CBBlflmi41U/w-d-xo.html
@@slfroden Make a more complex gearbox.
This is some pretty good camera quality for a random video from 7 years ago.
8 years ago*
@@navilhossain6212 30 Years Ago*
2012 bro
@@_-.G.-_ 67 Centuries ago*
Actually 8 now
Smart Roadster gearbox. Now I understand those slow changes.
7 years later I get recommended this
Lego engineers > Nasa engineers
Lego engineers = nasa engineers before they were nasa engineers
I know right? Space Shuttles should have gearboxes xD
I know this is 6 years old but this is a really badass gearbox design.
Thanks :-D
This is so freakin cool, I’m mechanical engineering student and I’ve always found gears and moving parts and such so fascinating
Made in 2012 , recommended now. 🤔
Бывает
Really cool idea, I never thought make a transmission like that, and also I must say that the light conditions and the quality of the video are excellent. :D
This is awesome. It projects the beauty of your technology, designing skills, intelligence and beautiful mind.
Nice and simple, even without the driving gear. Have to try, thanks for sharing the principle!
Wow, this is an ingenious piece of engineering.
Awesome! Exactly what i searched for :)
Thanks!!!
Very well done. That's nice👍🏾
This is way cooler than i first thought
+Aidan Holloway - Thanks :-)
This video makes my day.
I’d been planning on making a detailed RC car for a while, and this may be the perfect transmission design. I’ll have to rework it a bit to be shifted using a PF servo, but that shouldn’t be too difficult
Now I understand how it works
I've been looking at a bunch of these, but this seems to be the best based on how smooth it shifts gears, unlike EVERY other one I've seen (except a 2-speed automatic).
Thanks :-)
I also made another 'smooth' gearbox that I think is better than this one, which you can see here: th-cam.com/video/CBBlflmi41U/w-d-xo.html
Nice build
That's incredible
MAN you , you , you cool boy , you helped me!!! Thanks bro
Wow great job
Dude... genius.. very cool box
WOW this is so cool and compact ive never been able to make an efficient gearbox remotely that small. XD
Awesome, thanks for this. I will probably be making a crawler as a long term project, and this seems like the perfect transmission
As long as the gear selector is supported properly this gearbox works well. If you don't support the gear selector properly, the gears can jump/skip under load.
You might want to check out one of my other gearboxes which (I think) works better than this one: th-cam.com/video/CBBlflmi41U/w-d-xo.html
Good luck with your crawler.
Thank you! I love your work!
So it has three forward speeds, one reverse gear?
Yes. It can also be reworked to have different combinations if that is what you are after.
This is amazing!
Nice! In my JCB tractor, I used a 2-gear gearbox, because in general there's not much room for so many gears.
Everything you make is awesome damn.
Thanks :-)
Perfect sync mesh to
Would be pretty sweet to see this on a buggy using this transmission.
YEAH!
Very well designed
clever design!
Wow actually has a smooth transition as well....
Nice, I definitely picture myself using this gearbox in an rc car(with some additional attachments to connect the reverse gear to the main axle). Of coarse I'd need the pieces. And a design. And some wheels. And... well, you get it. But otherwise, nice build!
Thats awesome!
Truly remarkable!
The mechanism is really interesting...
Wow, this is a very cool gearbox! No need for strings like in a 90° shifter.
That’s well ingenious!
GENIUS!
This is very cool
Amazing!
If you can find a way to change gear faster that would be pretty cool.
L Engine
Switch the gearing around
Just change the gearing of "the worm"
wow very cool, Lego Technic is just great
Crazy how nature do that
That’s a 3 spd with reverse. Still cool though
That makes 4 speed
Very clever.
Technically it's a 3 speed with reverse not a 4 speed... that aside only complaint I could make is maybe the motor changing between gears was geared down a little to much
This gearbox has two distinct outputs. The first output has three possible speeds, while the second output has one speed when engaged. Hence I have labelled it a four speed gearbox. This is not the same as, for example, a car gearbox that only has one output. The second output just happens to rotate in the opposite direction to the first output, but this could easily be changed with a few more gears if required. This is just a proof-of-concept, and many elements could be changed, including making the motor that changes the gears go faster.
Very cool
Great idea
very nice
That's amazing
Nice Video
Very cool dude. Used it for my lego rc car
I'd love to see your Lego RC Car... Do you have a video?
@@slfroden I'm sorry I already broke it down so I could make another car.
@@slfroden can you please make a tutorial for this? It would be very helpful to some people. Because this is a great design.👍👍
Thanks for your feedback.
I don't have any plans to make a tutorial/instructions for this gearbox at the moment.
This gearbox is a proof-of-concept, and as such it demonstrates an interesting mechanism, but ultimately I consider it a failure. Under load, the gears start to slip and grind. I don't want you (or others) to ruin your Lego gears. Of course, I'm happy if you take my original concept and adapt it to your needs, making it stronger so that the gears don't slip.
I made a much better gearbox (which I did make plans for) here: th-cam.com/video/CBBlflmi41U/w-d-xo.html
Fantastisch!!!!
Nice 3-2-1-R
Very nice.
Best think i ever see
It's got it all
So simple. So genial. 👍
Interesting construction, nut what will happens if handle will stay "between" gears?
When the gear selector is between gears the output axles will not be coupled with the input. This is like being in 'neutral' in a car gearbox.
If this doesn't need a clutch then this is an invention!
This would not work in a car because the momentum of the wheels will destroy the engine
@@menno763 I don't even think it would work in lego if there was an actual load on the output axle. Like attach this to a big lego car and see how it handles shifting gears while moving.
The only reason it can shift smoothly without any stutters or loud cracking noises is because the output of the gearbox has literally zero load on it.
Awesome
I know in the description you say: NO BUILDING INSTRUCTIONS... so could you please do for me the instructions :D
(Pls) thank you!
Next to debut in chevy's 2022 lineup!
the slowest shifting 3-speed and reverse manual shifter ever!
8 speed gearbox. That would be cool
bellissimo!
Sehr sehr cool
cyberdynesystem1O1 da stimm ich mit dir überein
Aber was ist der nutzen, kann mir das jemand sagen.
Would it be better to use a clutch system instead of the linear actuator setup?
There are many ways to make a Lego gearbox.
Which one is better? That will depend on your criteria for rating the gearboxes.
Is it better to have more gears? Less gears? Close ratio between gears? Compact size? Gears that don't skip or grind? Sequential? Automatic? Continuously variable? Can handle high torque? Etc.
Great work my friend! Awesome desing. Although i dont see that being very sturdy :( an xl motor will probably mess those gears up if you hold the output in place.
Genius
GOOD
Quick tip. Download Audacity. Take the audio track from your recording. Add a low pass filter to get rid of that high pitched tone in the background. Profit. I'd say set the filter to about 16kHz, just as a guess.
Thanks for the tip. This video was recorded about seven years ago with a simple point-n-shoot camera in a single take and uploaded directly to TH-cam without any video/audio editing. Since this video has over 100,000 views, TH-cam won't let me make any changes to the video/audio at all. In the last seven years I have upgraded my camera and now have a dedicated microphone and audio recorder, and I do use Audacity to edit the audio of my videos now. I am still learning, but I hope that you'll agree that my more recent videos are much better quality than my earlier videos.
S. L. Froden
Guess I should have looked at the date huh.
Seems, Lego never gets old, huh? ;) My brother and me constructed similar things w/ Lego more than 30 years ago!
Cool, but isn't this actually 3 speed gearbox with 2 output?
+Donald1982 - Thanks.
There are 4 distinct gear radios (4 speeds), and there are 2 output axles. I have listed the different gear radios in the video description.
Maybe it would be better to describe this gearbox as "3+1 Speeds, 2 Outputs"?
Yes, I said it a bit wrong. 3+1 speeds with 2 outputs is more accurate :)
Great work! one of the best lego gearboxes, but i think you have to choose an other gear ratio: it has to shift faster;-)
I would love if there wasn't a high pitched tone in the background of the whole video
Thanks for the feedback.
This video was recorded about eight years ago with a simple point-n-shoot camera in a single take and uploaded directly to TH-cam without any video/audio editing. Since this video has over 100,000 views, TH-cam won't let me make any changes to the video/audio at all. In the last eight years I have upgraded my camera and now have a dedicated microphone and audio recorder, and I use Audacity to edit the audio of my videos now. I am still learning, but I hope that you'll agree that my more recent videos have much better quality than my earlier videos.
Lego ASMR
Cool!
So beatifull
Cool video. I wonder if somebody could make a lego car with a working lego engine, gearbox etc. That would be pretty cool.
Don't wonder, DIY!
How did you hold the shifter in place when it was manual?
During the first half of the video, the shifter is able to slide along two axles freely.
During the second half of the video, the shifter still slides along those sames axles, but the fixed 8-tooth gear at the top of the shifter mates with the worm gear which is rotated by the motor on the left. The motor is controlled remotely.
Nice
So I'm guessing the second output is for 4low gear?
The second output is for PTO (power take-off) to power a winch or other mechanism.
Bastante ilustrativo
Genius, I'm gonna make bigger version of this gearbox (5+R) and will put it in my Cromwell tank.
Christian malik høj ignatiussen i wanna see ur tank
genial!
Super 👍
Can you do that with 1 output?
Yes. My original requirement for this gearbox was to have two outputs, but it could be redesigned to only have one output.
@@slfroden 8 years after the vid was uploaded, and youre still answering to New Comments...
I love your channel now.
Deberías subir un poco la velocidad del cambio poniendo un engranaje un poco más pequeño para que no se note el cambio de marcha
Would this be considered a clutchless transmission?
A 'transmission' has different meanings depending on where you live.
In the US, the 'transmission' is just the gearbox, and the clutch is separate from the gearbox. Therefore the gearbox is, by definition, clutchless.
In the UK, the 'transmission' refers to the whole drivetrain, including the gearbox and clutch (if present).
The mechanism in this video only shows a gearbox, and therefore it is clutchless, regardless of which definition you use for 'transmission'. However, this gearbox is meant to be used in a larger model, which could include a clutch.
If you ran a chain or idler gears between the forward and reverse shafts would it bind up when you put power to the input shaft or would it spin freely until the gear is selected?
@Josh Picard - The only reason for 'reverse shaft' is because I wanted a design for a gearbox with 3 gears and one PTO gear. You could remove the reverse shaft/PTO, and extend the gearbox to have more/less gears as needed.
If you linked the forward and reverse shafts together, then the speed of the two shafts will also be linked - no necessarily the same speed as each other nor the same direction, but linked none the less. Since this gearbox can only engage either the forward shaft or the back shaft at a single time, they will not bind when linked. If no gear is selected (the small dead-spot between gears), then both of the shafts can spin freely, but, as they are linked, spinning one shaft freely will also cause the other shaft to spin also.
Of course, if you change gears very quickly, there will be rotating gears/axles within the mechanism which are temporarily no longer connected to the input, and as you change to another gear and this may cause some stress on those components and may cause binding.
3g tronic ? 👏👏👏
i dont understand it 100% but u get a like from me.
Thanks. If you have any questions that I can answer, just let me know.
You should make a huge flywheel for it
Awesome! Where can you buy the parts to build these? I really want to build one!
+Bender - I get most of my parts out of official Lego Technic sets, or from BrickLink.com. Unfortunately I don't have a complete parts list for this model.
Thats cool, I just wanted to know where you got them. Also, today in robotics club we build one of your fidget cubes!
:-D
I don't think the second output was planned...
+Dániel Bukovics - Why don't you think the second output was planned?
The second output is reverse
omg 10 years
well is that the cool Bugatti Chiron gearbox where all were speakimg about ? 😂😂
Umm, no. :-P
No no no