LEGO 4 Speed Linear Gearbox, 2 Outputs
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- เผยแพร่เมื่อ 27 ก.ย. 2024
- 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...
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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.
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
7 years later I get recommended this
Smart Roadster gearbox. Now I understand those slow changes.
I know this is 6 years old but this is a really badass gearbox design.
Thanks :-D
Made in 2012 , recommended now. 🤔
Бывает
Lego engineers > Nasa engineers
Lego engineers = nasa engineers before they were nasa engineers
I know right? Space Shuttles should have gearboxes xD
This is so freakin cool, I’m mechanical engineering student and I’ve always found gears and moving parts and such so fascinating
Wow, this is an ingenious piece of engineering.
This is way cooler than i first thought
+Aidan Holloway - Thanks :-)
Would be pretty sweet to see this on a buggy using this transmission.
YEAH!
This is awesome. It projects the beauty of your technology, designing skills, intelligence and beautiful mind.
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"
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.
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
The mechanism is really interesting...
Nice! In my JCB tractor, I used a 2-gear gearbox, because in general there's not much room for so many gears.
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.
Nice 3-2-1-R
That's incredible
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!
Wow actually has a smooth transition as well....
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.
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
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, 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!
Best think i ever see
Awesome! Exactly what i searched for :)
Thanks!!!
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!
MAN you , you , you cool boy , you helped me!!! Thanks bro
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 :)
This video makes my day.
That’s a 3 spd with reverse. Still cool though
That makes 4 speed
Wow, this is a very cool gearbox! No need for strings like in a 90° shifter.
Lego ASMR
wow very cool, Lego Technic is just great
I know in the description you say: NO BUILDING INSTRUCTIONS... so could you please do for me the instructions :D
(Pls) thank you!
0:43 I thought that engine sound came from that gearbox.
Haha, no, I was living on a busy street when I made this video.
Make one that's 4wd
Kai Ealden
This can be used for 4wd, you just have to add two drive shafts.
Should make one that awd
Kieran awd is 4wd
@@PoppaCryptix no its not
@@jodi304 yes it is
Fantastisch!!!!
8 speed gearbox. That would be cool
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
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
Everything you make is awesome damn.
Thanks :-)
Nice build
Dude... genius.. very cool box
3g tronic ? 👏👏👏
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.
Very clever.
well is that the cool Bugatti Chiron gearbox where all were speakimg about ? 😂😂
Umm, no. :-P
No no no
this basically just act's like an automatic transmission but with manual gears
Не ожидал увидеть свежий комментарий
@@nadyaospennikova5845 I don't speak Russian, sorry.
@@kb.bit1 i doubt they speak english
@@CaptnCrnch alr
Thats awesome!
Truly remarkable!
I like your idea of sliding gears instead of using the LEGO transmission piece. But the design would be hard to motorize.
that's cool, but you don't need an xl motor geared down so much with the worm gears. maybe just use a m motor
+Mario Velez - Thanks. You are correct, the motor to change gears does not need much power, and pretty much any Lego Power Functions motor can be used.
Its to move it sideways not to gear it down
with real pto's you can still move while the pto is running.
So you just built a GM automatic gearbox?
This literally matches their durability and speed :'D
Nope, this is not an automatic gearbox.
At the start of the video the changes of the gears are done manually, and at the end of the video the changes of the gears are done remotely (via a second motor), but the gears don't change automatically by themselves at all.
@@slfroden now im not a cars person, but isn't the idea of an automatic gearbox that it lacks a clutch? Your gearbox doesn't have one right?
@Supertburt - A car with an automatic transmission still has a clutch-like mechanism called a torque converter and/or clutch packs, but these are controlled automatically.
The gearbox and clutch are usually two separate mechanisms, although they can be located in the same housing and so appear as one unit.
My Lego gearbox in this video does not have a clutch.
GENIUS!
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.
omg 10 years
clever design!
That’s well ingenious!
imagine if your car's gearbox was so slow that the wheels stop turning in between gear shifts
+Wedgie Man - Why would you want that? You wouldn't be able to use any gear except first gear, and maybe second gear.
Actually, real gearboxes stop delievering power to wheels in order to switch gear ratios.
@@demid6532 - Actually, in a manual transmission car, it is the clutch that stops delivering power to the wheels. The engine is still delivering power to the gearbox to aid in the synchronisation of the different gear ratios to make the changing of gears easier.
Great work! one of the best lego gearboxes, but i think you have to choose an other gear ratio: it has to shift faster;-)
Sehr sehr cool
cyberdynesystem1O1 da stimm ich mit dir überein
Aber was ist der nutzen, kann mir das jemand sagen.
Is this his you would build a linear gearbox in real life as well?
+C1Ansy - This is a video of real-life, showing a gearbox that I made out of real Lego pieces. I didn't use any CGI or computer animation to create this video. So, yes, this is one way that I would (and I did) make a linear gearbox out of Lego pieces in real-life.
slfroden I believe he meant a scale Sequential used in automobiles.
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.
Do a tutorial , please , very good project , l want do this
+Даниил К - I'm sorry, I made this gearbox about 5½ years ago, and I no longer have it put together. If you analyse the video closely, you should be able to see enough information to recreate it yourself. However, I consider this gearbox a failure - when the output is under load, the gears start to grind.
You might want to check out this other gearbox that I made: th-cam.com/video/CBBlflmi41U/w-d-xo.html
It's got it all
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.
What kind of engineering level is this?
Obviously it's a kind of gearbox engineering.
I know but it's...
Lego, you know, it's weird...
“Sequential”
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.
Deberías subir un poco la velocidad del cambio poniendo un engranaje un poco más pequeño para que no se note el cambio de marcha
Very well designed
Very cool
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.
IQ 350K!!! 🤯🤯🤯
😅😅😉👍👍👍👌👌
Great idea
Amazing!
Nice video zindabad will come
I think this is an automatic shifter as it can shift automatically. Only thing is, though, it is slow. I would end up modifying the motor's voltage to go faster when it shifts gears.
Not bad camera quality for 2012
No need to use a higher voltage, just leverage gear ratios and create more speed/less torque with a high spoke gear on the driver and a low spoke gear on the follower
Hmm. I suppose that would be a better option for the gear ratios. Thanks for the tip.
Hey, how is this kind of lego calls?
This is a 4 speed linear gearbox with 2 outputs.
@@slfroden sorry but he might be asking what is the name of the legos you used for this project
@@chokalocpurple9243 I'm happy to answer any questions that I can, but if a specific answer is required, I need a specific question. Unfortunately I cannot read minds.
Sorry, im asking for the name of the lego you used for this project.
@@iambization This model uses the Technic line of Lego pieces, and a few Lego Power Functions XL Motors.
Very nice.
slow
fast
FASTTTTTTTTTTTTTTTTT
reverse
If you are trying to describe the gear ratios of the gearbox in this video, then perhaps you haven't watched the video closely enough.
The gear ratios are listed in the video description.
And how to pronounce "FASTTTTTTTTTTTTTTTTT"?
That's amazing
Try to make it a 8 speed next
GOOD
Awesome
This is very cool
Very good thing. But it little bit hard to build.
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.
So simple. So genial. 👍
bellissimo!
When your transmission is so slow that the wheel stops altogether when you shift
This is not a complete transmission. This is just a gearbox proof-of-concept, which would only be one small part of the entire transmission. There is no wheel present in this design. There is no flywheel present. And there is no clutch either. If there was a something spinning that kept the momentum of the output axle going then the output (wheel) would keep spinning as you shift gears.
This is just a proof-of-concept which I have not refined or used as part of a larger system. The idea is that I have demonstrated the general principle, and you can now use this basic design to develop it further to meet your specific requirements as needed.
Nice Video
Just need it to be a bit faster on the transition, and some axles... Well, And a way to control it from a distance.
Ir controller
Legos: a bored college graduates favorite hobby
LPX7129ER so true
genial!
Honestly I'm puzzled with all these comments about how genial this designer is. I used to make gearboxes with my Lego Technic sets when I was 10 or so. There are far more impressive designs out there.
I agree that this isn't the best gearbox design ever created (read the video description).
If you've been building Lego gearboxes since you were 10 you must have some pretty good designs. Do you have any videos of them that you can share?