Build & Test Lego Gearboxes: 2, 4, 6, 8, 12-speed
Вставка
- Опубліковано 18 тра 2024
- Each gearbox is built from scratch and then tested for speed and torque. Flat layouts only (gears are on the same plane) for better visualization. Enjoy!
00:00 2-speed
01:09 2-speed with driving ring
02:31 4-speed
04:02 6-speed
05:58 8-speed with range change
08:29 12-speed with splitter
11:48 all gearboxes side-by-side
12:09 graphs
Key Lego parts used in this video:
Driving Ring 2L [6539] www.bricklink.com/v2/catalog/...
Axle Connector 2L [6538c] www.bricklink.com/v2/catalog/...
Gear 16 Tooth with Clutch, Smooth [6542b] www.bricklink.com/v2/catalog/...
Changeover Catch [6641] www.bricklink.com/v2/catalog/...
Changeover Plate [6631] www.bricklink.com/v2/catalog/...
Driving Ring Extension [35186] www.bricklink.com/v2/catalog/...
Check out a great resource on Lego gearboxes:
www.lugnet.com/~3813/ - Наука та технологія
I have never understood more intuitively how gearboxes work. 10/10 educational content.
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@@AxxLAfriku major, major cringe
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Thought the exact same thing. Thanks!
Same, before trying this myself
These plastic straight gears might be stronger than my NA Miata’s 5 speed.
Fun fact: every Mazda model has a different name depending on market. For example in Europe it is called MX-5 and in Japan just Roadster
@@anon2127 same with nissan
Probably.
Try having an RX-8. I upgraded to it from a Mazda 3 and I have never been more afraid of money shifting
@@nigelbassett3791 I didn’t know you could jam the valves into the pitons on rotary. I learn something new every day.
What they thought Legos would be: A great toy to help kids learn problem solving and creativity!
What it really is: A great tool for much older people to make prosthetic limbs, lego working submarines, and lifesize cars.
It's both
both
"Both, both is good"
Both? Both.
7:45 the reason the clutch exists on manual cars stopping the gears for a second so the synchro's can engage properly
7:50
I still drive unsynchronised vehicles and for the record, a clutch isn't needed, even without grinding gears.
I love how this shows the basic design idea for most manual transmissions, with high and low gear settings and over drive implementations. Definitely a great starting point if you want to learn how manual car transmissions work.
@esp ele What did he do lmao ? Someone got yelled at by mommy and now they wanna vent their anger online.
@esp ele He didn’t do anything wrong and you just sit there telling him to shut up. Invest your anger into pumping iron rather than being a keyboard warrior.
@esp ele You need a therapist bro
@esp ele Lmao get a load of this 12 year old right here
@esp ele The one I'm replying to.
Eventually you're going to build a full, life size car out of LEGO that can go 0 to 60 in 5 seconds, and is somehow only powered by a single LEGO motor.
Nah next he’s gonna make a functioning lego 4-stroke internal combustion engine. He’ll need no lego motors then
That is not how physics work. I am not saying BEC couldn't do it, just that we mere mortals wont be able to.
BEC: "I'm limited by the technology of my time"
too much loss through turning the gears
honestly probably doable to some degree if you allow external non lego componets (ie elastic bands to store power.) and only care about the initial burst
Wow this is really cool! I love lego
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“I love Lego.” How much did they pay you to say this? (Before anyone gets their knickers in a twist, it’s a joke, folks.)
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That 12-speed splitter is an incredibly intuitive example for explaining the concept of splitting gears to someone.
If only engineering classes were introduced like this...
Then no teaching would get done as the tutors would spend all lesson playing with the Lego. The first thing I can think of trying in that scenario would be mixing up gear ratios to try to increase torque enough to push down a stapler with a single motor, I'd then spend half the day stapling a single booklet together. :)
When going to engineering school you should be able to interpret abstract and complex ideas without images or physical models.
Then become s professor and do that in your classes
@@kattihatt Yeah nah chief I'm in uni rn and that's bullshit. We use computer software to visualise al the time, we're expected to do that.
@@spinyslasher6586 ok boss.
Neat, this helped me realize how gearboxes work
Exactly, UA-cam always answers questions you never asked
@@mcfly6976 so true
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Cowabunga!
neat
This is a great demo of how these transmissions work. It would be neat to see a combination of the 8 and 12 speeds versions show here, to represent how a 18 speed works in a tractor trailer.
All you need is a clutch, a reverse gear, and you'll truly teach how gearboxes work, i had no idea this is the deal about those
The gear grinding... you should make a clutch.
Could use those bulky rubber wheels as clutch pads, spring suspension or pneumatic pieces for pressure?
I'd personally love to see a torque converter.
I suggest you look at some of MaxBrix's videos. He's made a few CVTs which are super cool
yeah man clutch is needed then the torque will increase automatically
@@dhrubajyotisaha8539 That's not how a clutch works. Torque multiplication would be a torque converter
And a flywheel so the output doesn’t slow down so quickly
@@canonkeogh4683 would it be possible to get a flywheel meaty enough with Legos?
Isn't it fascinating that just by moving some parts you can achieve different speeds. It is truly amazing
It is amazing!! Consider that that's basically what every living thing tries to do (in a way), it's interesting to think about! For example, proteins and enzymes are just litte molecular lego building blocks. And cell walls in plants are basically building bricks!
@@SSJ0016 I will agree with you
Isn’t it fascinating that eating different amounts of food achieves different hunger levels. It is truly amazing
Yes.
Isn’t it fascinating that different shades of yellow in the urine tells you your hydration levels. It is truly amazing
0:43 is the reason why a clutch is always important
i have seen several videos on how a transmission works, with fancy 3D graphics and narration, but was still hard to undertsand.
This made me get it. seriously.
Just a reminder as a mechanic:
•Less speed, more torque.
•Less torque, more speed.
•Gear ratios is how many spins more than the original one(for example 2 gear ratios is 2 more spins than the original)
I'm not a mechanic, but isn't anyone older than 10 years should know that?
@@nibba7614 depends on where you grew up and who's around you growing up
@@nibba7614 not necessarily, schools don’t teach a thing about torque in such smaller classes
@@nibba7614 true
@@nibba7614 I don’t know that I’m 10
I don’t know if it’s possible, but could you rebuild an automatic transmission/gearbox with Lego bricks?
There are a few Lego automatics around, here is my favorite one. Four speed automatic that shifts based on torque needs. Super clever way it measure torque: ua-cam.com/video/YmhiuIRfpbo/v-deo.html
I built a model of an Allison automatic transmission. It doesn't shift gears automatically though because I don't have anything like a flywheel connected to the output shaft to keep it spinning as the transmission shifts gears. You can see it on my channel.
Somebody already commented one, but this is my favourite one
ua-cam.com/video/dQw4w9WgXcQ/v-deo.html
@@leftysheppey oh that is an excellent video you have there
@@leftysheppey wow, I can see why that’s your favourite. It’s pretty cool what you can do with plastic building block toys.
2 years late on this but my father was a truck driver and I was always entranced by watching him shift through his 10 speed on his Semi as a child. Understanding how it works now is still fascinating and gives me an even deeper appreciation of the applied science that goes into gearboxes. Mechanical advantage through a series of what appears so random on the outside, but is actually precisely measured. I love it.
The “8 speed” gearbox shown at 6:00 exists in the wild as a 4 speed gearbox with overdrive. Some British sports cars from the 60’s and 70’s have it. The cars had a 4 speed transmission as normal, with a solenoid-actuated electric overdrive box on the output just like the one shown has on the input. Basically a second gearbox. It gave the cars 7 forward speeds: 1st, 2nd, 2nd over, 3rd, 3rd over, 4th and 4th over (first and second were close enough that a first-over was unnecessary). It was useful for touring, allowing drivers to find an optimal engine speed for cruising on any given road!
Is there anything like that, now, or do modern engines and transmissions not need such fine tuning for their RPMs?
@@someinconsequentialusernam7799 Most modern engines produce adequate power over a wide RPM range to not need this. Although we're starting to see more speeds (6 is common now, sometimes as many as 10) in new vehicles to optimize fuel economy. Where you'll find this the most is semi trucks. Many on the road have transmissions that operate like the 8 and 12 speed shown here. Many truck drivers would consider the Eton Fuller 18 speed as the best out there. It operates like a combination of the 8 and 12 here. With a high and low range (8 speed) as well as a splitter on each range(12 speed).
Also, look up a Gear Vendors Overdrive unit. It is exactly what Will R speaks of.
Isn’t the 12 speed just a 6 speed with a high and low attached to it?
The 12 speed is like a modern automatic 8, 9, or 10 speed transmissions with planetary gear sets that are selected in different combinations to evenly step up the gear ratio
it's more like the Koenigsegg Lightspeed transmission where there are multiple shafts so you can combine gear ratios. Engineering Explained made a cool video about the Koenigsegg Lightspeed transmission.
@N Whis 12-gear gearbox looks like a truck gearbox (1L, 1H, 2L, 2H, etc.), isn't it?
8-speed and 12-speed shown here are representative of how truck transmissions work. Your typical Eaton 10-speed (same as 8 but with 5 on each range) has a range selector that works the same way as demonstrated in the 8-speed here. A 13-speed and 18-speed combine that with a splitter that works the same way as the 12-speed that's demonstrated. So yes, an 18-speed is just a fancy 4-speed (or 5-speed if you include the low gear).
It's a splitter, and the 8 speed has an overdrive
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It would be really cool to see a LEGO gearbox with different clutch designs. It would be especially interesting to see if you can make a centrifugal clutch with LEGO.
I have done a centrifugal clutch, it wasn't particularly good but it worked. I may see if i can upload a video with it in
I'm impressed, you actually created multiple different variations and types of gearboxes, including crash, synchronised, range, and splitter gearboxes. You could have cheaped out and just expanded the 2-gear crash gearbox with additional stages, but instead chose the added complexity of different types. Kudos! Very educational.
5 years from now: Making a fully functioning car in 1:1 scale using legos
Haven't lego themselves done this?
ua-cam.com/video/n-RtJOfFlZU/v-deo.html
@@iluvsoupers This guy could probably make it more piece efficient and faster
@@iluvsoupers This guy can make a Lego Lambo that is actually faster than the original Lambo
I am convinced this man is going to make a full size, functional car out of lego eventually. That or a Death Star.
I also make a video on this topic, ming you support
he gonna do a death star and actually send it to space
I would love a more in depth video on all the components and how they work together to actually redirect the gears and stuff.
As an owner of a six speed manual car, I thoroughly enjoyed these builds!
You should make a simple lego rc with a one of the smaller gearboxes. That would be really cool.
I also make a video on this topic, ming you support
I absolutely can’t figure out what it is that the “driving ring” does or how it works. I understand normal gears, and I even used Lego Tecnic to make a gear box three decades ago, with a clutch, 3 forward speeds, and reverse. But I absolutely can’t wrap my head around the “driving ring”… None were included in the Tecnic sets I had.
I think it slots under the gear and lets it spin
Yeah it's got me confused as well
I think it represents a synchroniser ring placed on the shafts of large scale transmissions. In a transmission, the wheels are connected to the input shaft. The input shaft rotates at the same speed as the wheels, which moves the countershaft, and then the driveshaft in turn. Now the gears on those shafts have to have their speeds aligned with the speed from the shafts, or else they will grind during shifting. A synchroniser ring, or a drive ring in this case, rotates at the same speed as the shaft idly. During shifting, it will connect its teeth with the gear teeth and synchronise their speeds, so that the gears rotate at the same speed during shifting.
I've never seen these before either, but looking at the video I think the driving ring gear as a circular hole so it'll spin freely on the shaft, and the driving ring has a + hole to grip the shaft.
The teeth on the outside of the driving ring can mesh with the side of gear to engage/disengage the gear.
Basically, the gears spin freely on the shaft and the driving ring spins with the shaft, but can slide. When the driving ring meshes with the gear, it connects the gear to the shaft.
Seriously impressive. Very cool to see how gear ratios and torque work on a simple scale helping people learn. If only I had this when I was learning how transmissions work
This video helped me understand gearboxs better, especially with how engine speed relates to wheel speed as well as how torque is diminished as the gear ratio quickens the potential speed of the wheel.
Next video: Making an automatic gearbox with planetary gears.
The Range and Splitter visualizations certainly helped me as I've used those setups in both the SCS Truck Sim games and in Farming Simulator 19 (with a mod, of course).
Somebody posted this ua-cam.com/video/dSXqpYkRyTY/v-deo.html
@@straightpipediesel That's cool! I use those in ETS 2 and ATS ever since finding out how good they are with the torque multiplier and seamless shifts.
I’d love to see how a clutch would work with this
As an engineer that actually develops transfer case and low range gearbox systems, that 2 speed gearbox is kawaii as f***😍
Great video!
I just need you all to know, this is my go-to channel after I get really high and have watched a few documentaries, continue to get high then lose the ability and desire to think.
Thanks for making binge-worthy content that is PERFECT to veg out to with a few snacks!
Much love from Canada eh? Stay frosty ;)
7:50 the old Manual Gearbox analogy ringing true... "if you can't find 'em, grind 'em" =)
I am telling you this guy is gonna make a whole rocket to the moon with just legos 😂😂
Not really
BRO I SWEAR
@@midnightpurple555 well it is not actually possible because the plastic would Instantly melt as it takes off but it is just humor
Until the guy actually tries😂😂
@@aryanpawar8409 More of all because Rockets don't need gearboxes without going to deep...... :/
@@aryanpawar8409 that would make for an interesting episode!
I've never been able to wrap my head around how gearboxes work, so thanks for making this. Also now I need one of these to put on my desk.
Mechanics explained the simpliest way! And how satisfying, if you multiply rpm and nm for each gear combination you end up with the same output power. Need this in schools!
Why is it so satisfying like wow
Great demo, never knew quite how this works. Was really hoping to see that standard 5+reverse pattern though.
Reverse is much the same, except it puts a single extra gear in the drive path thus reversing rotation. Its fairly simple.
@@EllaBananas Yeah, it is just first but reversed, and depending how it is done you could potentially have any gear in reverse
I have to say this, I absolutely LOVE this video! It's really helpful for me, as I never understood how a gearbox works. I wish I had the pieces for these at home to construct one! I also love the little shifter, it made me go like "Damn, this guy's gonna make a car out of Legos." Great content, keep it up!
It even makes the sad noise of a poorly engaged reverse gear. How realistic :)
Great video
I also make a video on this topic, ming you support
I like to imagine this and the engine tests are all building up to something. Like a working, realistic automobile made out of lego.
Nice demo, just for info purposes, a typical semi will have a 4 speed split gearbox with a high/low range, giving 16 gears. The 4 gears are changed normally with the stick, the split is a little switch on the front of the shifter knob and the range is a paddle a little lower down. Older semis had some weird transmissions or two with twin sticks.
Your understanding of gearing is wicked genius
As someone who loves cars AND Lego Technic, this is now one of my favorite videos
I'm telling you, this guy is gonna make a fricking tank with hese legos
he's already done it 😃
This just made me feel like to learn gears and how they change speed
I’d love to see how the clutch mechanism plays in to these gear boxes. This is genuinely so cool.
I also make a video on this topic, ming you support
This helped me understand a gearbox more than anything ever has and there wasn't a single word spoken. Good job.
Great work! I find it very interesting to see the loss of speed in the highest gears on the 8 and 12 speed gearboxes as the torque losses add up.
Some kind of flywheel would help when moving upwards, to keep momentum going
I’ve never been able to understand how a gearbox works. This is both cool to watch and highly informative. Love your videos!
i love the sound of the lego pieces clicking together
Would be cool if you would measure the efficiency of the system. Just hook up another motor to the end of it and measure generated power in relationship to the input power.
Worth noting that Speed (in Rad/s) x Torque (in Nm) = Power (in Watts)
The only thing missing is the initial speed and torque of the motor.
(which you could estimate off the power supply; power = volts x current, but it'll also include the efficiency loss of the motor)
@@phoephoe795 well, to get the motor efficiency out of the way you just hook 2 motors up directly with an axle to measure the zero state efficiency and compare any build system against that. Results in a pretty easy to measure loss in wattage compared to zero state, and a plain efficiency value.
But yes, comparing initial speed and torque against ideal outgoing speed and torque and real outgoing speed and torque also works. The power comparison is imo just a lot easier, less prone to calc/measuring errors and results, at the end, in the same efficiency.
The only difference between this and a real transmission is a clutch, but those rings do a good job at being one for Legos. How would you actually build a clutch out of Legos?
The tires might be a good idea
@Rita 25 y.o - check my vidéó it looks like it, that's how 18 wheelers work
i never thought i would learn how gearboxes worked through a lego video. thank you. i love the videos
These videos are WAY too satisfying AND fun to watch.
As a truck driver, I've always wondered how how the transmission works. I can imagine it's quite similar to what you've got here with the 8 speed. My truck has a 10 speed.
My question is, from where does he get every single piece of lego on earth?
Astonishing! Thank you.
I have always wondered how a gearbox works but have been too lazy to actually look it up. Awesome video!
Can you make an automatic transmission? That would be sick!!
ua-cam.com/video/fuGnJ1PF0aU/v-deo.html how about this?
Try to make a gearbox with 5 speeds and a R, I’d love to see it!
Today I learned how gearboxes work. Also love that recognizable sound of messing up a gear change.
Now I understand how the gearbox works thanks man
One doesn’t experience self transcendence, the illusion of self only dissipates 🎈
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This made me understand gearboxes better Thank you!
Very instructive. It looks like the 8 speed gearbox is a 4 speed next to a 2 speed, so it results in two non-overlapping 4 speed gearboxes.
That’s why I love Lego, back when I was barely 13 it made me understand how gearboxes worked. Best gifts I’ve ever had
Good grief! I have no idea how you figure this all out other than you are a mechanical genius. Fascinating viewing. Thank you! 😎 (and beautifully produced and filmed to boot!)
This video taught me more than what I could ever remember from school! If we were taught with legos, lord knows what what would happen next. Amazing vid👍
This guy's transmission skills are very strong.
EDIT: 2:34 Have to say it.
With a four-speed on the floor, they'll be waiting at the door.
Amazing, man. Thank you!
This is strict educational material of the finest degree.
I understood perfectly what a transmission is with this example. It settles the intuition fast with a transparent example.
This, and that old school, black and white video on gearboxes helped me way more than drivers ed class did
I would love to see this keep going, maybe make another version with a clutch, I’d be so happy if this did eventually turn into a full car
This is teaching me more than I learn at College studying Motor Vehicle. Amazing.
The sound of the gears spinning is so satisfying
How can someone be so educational without saying a word. Truly magnificent.
Just hypnotizing! You can't stop watching 😊
Alright.. I'm just getting into Transport and am currently driving an 8 speed manual truck that has gears in a 'H' pattern, 1-4 in the bottom box and 5-8 in the top box that has a button you flick up/down to change what box your in, and am just begining to get my head around the 12 and 18 speed Non-syncs that have the same 'H' pattern but get the extra gears by being able to go up half a cog and 'Split' the gears and THIS is so helpfull to be able to visualize with the Range changer in the 8 speed and splitter in the 12 speed! Really awesome!!
This also helps explain why transmission work is so expensive...
What an amazing video and channel! Thank you!!!!
Amazing content ! It's really great to see all the pieces you're using before a build.
You never stop to impress me what you can do with lego
This is how Gearbox works which portrayed by Lego
Good Job! 👏
These visualizations are very useful, thank you.
Damn, that's actually crazy. I never thought about why the gear stick is done in a way that's so hard to go 2nd to 3rd but this makes sense.
This is a really nice way of learning truck gearboxes. Thank you so much
Wow what a great demonstration 🔥
i was starting to like and love cars, especially manually operated ones. this video is very informative!
Brilliant, I understood the gear only after seeing this video,nothing else helped me.Thank you!
Beautiful. Just...beautiful.
I found this randomly and dont regret at clicking at this at all.
Very educational on how cars work.
Pretty cool seeing lego versions of overdrive gearboxes
actually fantastic. literally no idea how they worked. 11/10.
Straight cut gears and slam shifting with no synchros. Delightful.