Karl Brown Sure they can! You can build one for around $60 if you've got a little electrical and mechanical know how. There's a pretty good write up online somewhere.
Wow dude. That is very impressive. People don't generally understand just how difficult 3D modeling is on its own, not to mention the mathematics and knowledge that its takes to make shiftable elliptical gears sets, AND to top it all off you made herringbone gears so you could have an open system. Your next challenge is making one that shifts using clutch packs.
This is a model of how the planetary gears operate inside an automatic transmission. He's not wrong when he says that this is how the auto trans works BUT there is a lot more to it than just the planetary gear set. Good work though.
Aside from it being aesthetically pleasing to watch, I was impressed when I saw first and second gears, then when I saw you clear 6th and reverse I had my mind blown. Youre a genius man
Just made one of these myself. It's beautiful, and it's a fantastic way to teach people how transmissions work and how cool mechanical engineering can be...
I'm not going to argue what this is, because what it IS is an awesome model of a working gearbox. I'm just getting into 3D printing, and it's truly cool. Thank you for sharing your work. This took a long time to design and print.
Emmett, this is seriously one of the most amazing models I have ever seen. Thank you for posting. I hope you ignored all the ignorance in the comments section.
Brilliant job Emmett. I printed it on my Makerbot2 and it runs like a dream. The pins were ridiculously tight, but nothing some files couldn't fix. You are a very smart guy. Thanks for the sweet model, it's probably my favorite so far from Thingiverse. Cheers
It's an automatic. manual transmissions operate differently. A manual transmission physically changes a sprocket to engage a different one to change the output. Automatic transmissions never engage or disengage sprockets, just apply clutches to different parts of the mechanism to cause it to transmit power differently through the planetary gear set.
Nice planetary setup, but since it is such a cumbersome way to changer gears, planetarys are usually setup with a fixed gear reduction and used as a wheel hub say in a peice of construction equipment on each drive wheel.
I think a better description is this is how a planetary gearset works, rather than this is how an automatic transmissions work. There are auto transmissions that use standard meshed gears just like a manual transmission, but with the syncronizers replaced with clutch packs (A lot of honda transmissions are like this)
How many "WOW"s can a person get? One more than you might think, cause here comes another - W O W ! ! ! Emmett, you have some amazing talents and more importantly you are sharing your adventures. Thank you...
This is excellent work. Using the herringbone gears would also render disengaging or re-engaging while moving impossible. Change the gears to synchromesh gears to allow this while moving. To make this automatic you simply add the hydraulic values and sequencing through the hydraulics that are driven by the speed of the input shaft which will increase the flow of fluid and thus the pressure to shift gears. Also on normal transmissions they use break bands (straps) to stop gears so the stopping doesn't shear off the break pins with a sudden stop. All in all this is a good concept with a very minimal number of parts and believe it or not with the above tweaks it would work be compact and light weight. The input shaft could be telescoping (comments below). This would be great for a R/C car or maybe a bicycle. My hat is off to you sir well done.
I just printed on my UM1 with heated bed. Printed nearly flawlessly with the right print parms, only some light filing to get the pins to go in smoother, and some grease to make it go. I laughed out loud I was amazed it worked so well! Now of course someone needs to add the electro mechanicals , computer, sensors and a driving motor to make it a real automatic. But very awesome.
For those who keep calling this a manual transmission: just as today’s engines have an ECM (engine control module), today’s transmissions have a TCM (transmission control module). He’s just acting as the TCM. Rather than flipping little levers with a hand, a TCM is programmed to engage/disengage certain clutches or brakes in the transmission according to driver’s acceleration demand, engine torque supplied and wheel torque demand. A transmission’s behavior can be changed by reprogramming the TCM, which is how many cars can offer several driving modes.
Yes, what makes a transmission automatic is the controller the engages the different brakes and clutches depending on the speed of the wheels and the throttle position. However, this is a common gearing arrangement for that system to actuate, which is itself different than a manual transmission gearbox. Then you have paddle shifters; do you call that manual or automatic? The line begins to blur...
Brilliant idea, but unless you have a sliding input shaft that can shorten and extend, it is impractical to move the input power back and forth to change gear.
Not bad, but 'Drive' is merely the term for the transmission being told to select all available forward gears. 'Overdrive' is any ratio that doesn't increase the torque coming out versus coming in.
If you were to put another handle on the output side it would be easier to visually see the differences from your hand cranking to the output speed cranking.
Very nice design! Try to put this thing inside a bicycle rear wheel hub (imagine the output annulus is a part of it) and you'll get a bicycle 6-speed manual transmission ;))))
Nice Work Emmett. Have to say tho, from a trying to follow visually perspective, put a bit more distance from camera (maybe up to 6") and average your overall lighting and perhaps upgrade to 720. That should make a lot better overall definition to your clip. 10 out of 10 for all other effort, nice to see some real effort in a design. Luv it.
I think what he means is that by "Automatic" you were claiming that it shifts gears by itself without anyone moving the clutch and applying a brake. Your transmission is a manual transmission
Well, driving with a planetary gearbox manually, without any assistance mechanisms, would be a fun and probably expensive challenge I would love to do.
I know it's been a few years, but you do realize this is NOT how an automatic works right? There are no "brakes" involved. It is a series of planetary gear systems where the output of one is locked to the input of the next.
This is a model of how a automatic transmission works! An automatic transmission, (self-shifting transmission), is a type of transmission that can automatically change gear ratios as the vehicle moves, freeing the driver from having to shift gears manually. Like other transmission systems on vehicles, it allows an internal combustion engine, best suited to run at a relatively high rotational speed, to provide a range of speed and torque outputs necessary for vehicular travel. The number of forward gear ratios is often expressed for manual transmissions as well. The most popular form found in automobiles is the hydraulic automatic transmission. Similar but larger devices are also used for heavy-duty commercial and industrial vehicles and equipment. This system uses a fluid coupling in place of a friction clutch, and accomplishes gear changes by hydraulically locking and unlocking a system of planetary gears. These systems have a defined set of gear ranges, often with a parking pawl that locks the output shaft of the transmission to keep the vehicle from rolling either forward or backward. Some machines with limited speed ranges or fixed engine speeds, such as some forklifts and lawn mowers, only use a torque converter to provide a variable gearing of the engine to the wheels. Please don't be stupid and look at the title before starting war in the comment section.
This isn't about intelligence. I'm sure you could learn how to do these things if you really worked for it. Yea, it comes easier to some than to others, but that's life.
Isn't figuring things out about being smart? Like everything has a way it reacts to something else, and figuring out how is called science. But yeah, you kinda are onto something: I don't think that one can become a scientist or a "smart person" by believing that one is smart, but by admitting one's own stupidity and letting the environment/surrounding reality tell how things are.
+nick haydu I think that the planetary gears are what is used in modern automatics. Standards have parallel shafts with gears that don’t orbit the shaft. The “brakes” are hydro or electric operated to control the gears, not the ones that stop the car.
you should donate this to mechanical engineering department in university or college so that others can benefit from your hard work. it will help students understand the gears and basics better. thanks for sharing
Its not as easy as it sounds, with the 3D printer he probably used you would have to print out almost 350+ parts to make just the body. Using a Objet1000 would still take 30+ parts and thats a 10,000$+ printer. Not to mention a lot of money worth of plastic molding materials. It would also take a 4+ Hours for each part. Overall its just not worth it yet. The technology hasn't advanced far enough to do that as a personal use. Only companies use Objet1000 printer because they're the only ones who can afford to buy it and pay for it.
Stoney3K Theres also a lot of problems with building something on two wheel, unless you mean a motorcycle which wouldn't technically be classified as a "Vehicle" but as a Motorcycle.
So you have 3 inputs with 2 states for 1 output, so you'd technically have 8 possible arrangements (2^3 gears) so what happens if you put it into the 2 missing states of this video?
I feel sorry for all of these ignorant people.. This is a model of an automatic transmission. It is not an automatic transmission. It is not supposed to operate automatically, because it is just a model. Just like you can't drive a model of a car.
Thats amazing! Itd be cool if you hooked up a micro controller like the arduino or a raspberry pi and had it shift while turning, but I imagine that would be pretty difficult :/
technically all transmissions are manual. automatic transmissions just use the speed sensors and pressure lines to move the gears, still manually controlled... by a computer.
WOW This is so cool! Did you build this entirely with a 3d printer? If so, could you point me to the models you used? This would be a cool gadget to add to my work table. Thanks!
Wow, just wow. This is an incredible model and demonstration. Thank you for creating the video.
you literally took the words out of my mouth lol! what an amazing proj I wish I could do something like this myself
Karl Brown yeah man
Karl Brown Sure they can! You can build one for around $60 if you've got a little electrical and mechanical know how. There's a pretty good write up online somewhere.
Nice work! Very impressive.
among us in real life (sus , sus)
Even 10 years later, this video is still awesome
Wow dude. That is very impressive. People don't generally understand just how difficult 3D modeling is on its own, not to mention the mathematics and knowledge that its takes to make shiftable elliptical gears sets, AND to top it all off you made herringbone gears so you could have an open system. Your next challenge is making one that shifts using clutch packs.
This is a model of how the planetary gears operate inside an automatic transmission. He's not wrong when he says that this is how the auto trans works BUT there is a lot more to it than just the planetary gear set. Good work though.
eclipsepease thats right but this is the main thing of speeds
You should automate it using Arduino and some solenoids
pretty much a plc
awesley92 not real
inputs, outputs, a program..... yeah pretty much minus a few bells and whistles
awesley92 have you ever seen "randa Arduino"?
Rather a small servo...
Aside from it being aesthetically pleasing to watch, I was impressed when I saw first and second gears, then when I saw you clear 6th and reverse I had my mind blown. Youre a genius man
TH-cam recommends this after 8 years. Nice, also cool model!
Just made one of these myself. It's beautiful, and it's a fantastic way to teach people how transmissions work and how cool mechanical engineering can be...
This is awesome! Really impressed. Was extra-impressed several times - when you went through an extra 3 gears I didn't think would be there.
I'm not going to argue what this is, because what it IS is an awesome model of a working gearbox. I'm just getting into 3D printing, and it's truly cool. Thank you for sharing your work. This took a long time to design and print.
Emmett, this is seriously one of the most amazing models I have ever seen. Thank you for posting. I hope you ignored all the ignorance in the comments section.
Brilliant job Emmett. I printed it on my Makerbot2 and it runs like a dream. The pins were ridiculously tight, but nothing some files couldn't fix. You are a very smart guy. Thanks for the sweet model, it's probably my favorite so far from Thingiverse. Cheers
It is so manual for an automatic.
:)
Raul Visnitchi its a model. A real one would have motors, hydraulics, and such
I think, it is good idea to bring this to the fully automatic gearbox using arduino, that will be awesome !
It's an automatic. manual transmissions operate differently. A manual transmission physically changes a sprocket to engage a different one to change the output. Automatic transmissions never engage or disengage sprockets, just apply clutches to different parts of the mechanism to cause it to transmit power differently through the planetary gear set.
Edit: regular automatic transmissions are built nearly the same way.
Nice planetary setup, but since it is such a cumbersome way to changer gears, planetarys are usually setup with a fixed gear reduction and used as a wheel hub say in a peice of construction equipment on each drive wheel.
I think a better description is this is how a planetary gearset works, rather than this is how an automatic transmissions work. There are auto transmissions that use standard meshed gears just like a manual transmission, but with the syncronizers replaced with clutch packs (A lot of honda transmissions are like this)
unbelievable engineering...I can't even begin to wrap my head around that.
How many "WOW"s can a person get? One more than you might think, cause here comes another - W O W ! ! !
Emmett, you have some amazing talents and more importantly you are sharing your adventures. Thank you...
good work boy !
i don't know if idea is technically practicable
but best thing i see here
is passion you put for inventing this
thanks bro
This is excellent work. Using the herringbone gears would also render disengaging or re-engaging while moving impossible. Change the gears to synchromesh gears to allow this while moving. To make this automatic you simply add the hydraulic values and sequencing through the hydraulics that are driven by the speed of the input shaft which will increase the flow of fluid and thus the pressure to shift gears. Also on normal transmissions they use break bands (straps) to stop gears so the stopping doesn't shear off the break pins with a sudden stop. All in all this is a good concept with a very minimal number of parts and believe it or not with the above tweaks it would work be compact and light weight. The input shaft could be telescoping (comments below). This would be great for a R/C car or maybe a bicycle. My hat is off to you sir well done.
I just printed on my UM1 with heated bed. Printed nearly flawlessly with the right print parms, only some light filing to get the pins to go in smoother, and some grease to make it go. I laughed out loud I was amazed it worked so well! Now of course someone needs to add the electro mechanicals , computer, sensors and a driving motor to make it a real automatic. But very awesome.
For those who keep calling this a manual transmission: just as today’s engines have an ECM (engine control module), today’s transmissions have a TCM (transmission control module). He’s just acting as the TCM. Rather than flipping little levers with a hand, a TCM is programmed to engage/disengage certain clutches or brakes in the transmission according to driver’s acceleration demand, engine torque supplied and wheel torque demand. A transmission’s behavior can be changed by reprogramming the TCM, which is how many cars can offer several driving modes.
No waste of time, direct to the goal. Visual and simple THANKS
Yes, what makes a transmission automatic is the controller the engages the different brakes and clutches depending on the speed of the wheels and the throttle position. However, this is a common gearing arrangement for that system to actuate, which is itself different than a manual transmission gearbox. Then you have paddle shifters; do you call that manual or automatic? The line begins to blur...
Bravo dude, this design is really elegant and impressive.
Brilliant idea, but unless you have a sliding input shaft that can shorten and extend, it is impractical to move the input power back and forth to change gear.
Is it 100% 3D printed? It looks like the part on the front holding the brake is wood?
Adam 7 years ago
Damn this is amazing, initially I though such small model probably only have 3 gears, turns out it has 6 and a reverse!
it's now 2017 and ur thing still sounds genius for me
Dude - this is bananas, great job! I like the two colors, nice touch.
Not bad, but 'Drive' is merely the term for the transmission being told to select all available forward gears. 'Overdrive' is any ratio that doesn't increase the torque coming out versus coming in.
They will definitely work. In fact, many RepRap extruders use gears just like these to push filament.
This is one of the most awesome things on thingiverse!
Nice herringbone gears
That's awesome! Thanks for the visual, it really helps!
damm, this is some serious mechanical engeneering, congrats!
very neat man. one of the best model video demonstrations I've seen
Wow that is extremely cool! It would be a fantastic teaching tool to show people how the planetary gears work in a transmission.
If you were to put another handle on the output side it would be easier to visually see the differences from your hand cranking to the output speed cranking.
The automatic transmission is based on a German gearbox from the 1900s that was used on boats but never caught on but later used on cars
No, it's a plastic desktop model. It does show the principle though, with the same style of gearing that's commonly used.
Wow! Really cool model. I would love to see more detail of how it actually works.
this. is. absolutely. awesome.
If you 3D printed that, you should sell it as a kit!
I would buy it
Very nice design! Try to put this thing inside a bicycle rear wheel hub (imagine the output annulus is a part of it) and you'll get a bicycle 6-speed manual transmission ;))))
Sounds like you got yourself a real mouse infestation there.
Nice Work Emmett.
Have to say tho, from a trying to follow visually perspective, put a bit more distance from camera (maybe up to 6") and average your overall lighting and perhaps upgrade to 720.
That should make a lot better overall definition to your clip.
10 out of 10 for all other effort, nice to see some real effort in a design.
Luv it.
Very well made prints and well presented video. Thank you for posting this video.
I think what he means is that by "Automatic" you were claiming that it shifts gears by itself without anyone moving the clutch and applying a brake. Your transmission is a manual transmission
This is really neat! Thanks for the video!
very nice piece. now realize that an electric car needs only one gear for all speeds including reverse. join the revolution
Finally, the manual automatic transmission
You just won 1,000 internets...holy shit that was cool.
Wow. Amazing work!
Emmett you sir are a design wizard!!!
Wow this is fantastic! Excellent work!
Well, driving with a planetary gearbox manually, without any assistance mechanisms, would be a fun and probably expensive challenge I would love to do.
You make the coolest stuff Emmett!
I know it's been a few years, but you do realize this is NOT how an automatic works right? There are no "brakes" involved. It is a series of planetary gear systems where the output of one is locked to the input of the next.
this is the coolest thing I've ever seen
This is a model of how a automatic transmission works!
An automatic transmission, (self-shifting transmission), is a type of transmission that can automatically change gear ratios as the vehicle moves, freeing the driver from having to shift gears manually. Like other transmission systems on vehicles, it allows an internal combustion engine, best suited to run at a relatively high rotational speed, to provide a range of speed and torque outputs necessary for vehicular travel. The number of forward gear ratios is often expressed for manual transmissions as well.
The most popular form found in automobiles is the hydraulic automatic transmission. Similar but larger devices are also used for heavy-duty commercial and industrial vehicles and equipment. This system uses a fluid coupling in place of a friction clutch, and accomplishes gear changes by hydraulically locking and unlocking a system of planetary gears. These systems have a defined set of gear ranges, often with a parking pawl that locks the output shaft of the transmission to keep the vehicle from rolling either forward or backward. Some machines with limited speed ranges or fixed engine speeds, such as some forklifts and lawn mowers, only use a torque converter to provide a variable gearing of the engine to the wheels.
Please don't be stupid and look at the title before starting war in the comment section.
pretty amazing dude, well done!!
TFW you can never be this smart. Or when you can't even make the parts with a 3D modeling software ;__; Never the less, I'm glad that someone can.
This isn't about intelligence. I'm sure you could learn how to do these things if you really worked for it. Yea, it comes easier to some than to others, but that's life.
Isn't figuring things out about being smart? Like everything has a way it reacts to something else, and figuring out how is called science. But yeah, you kinda are onto something: I don't think that one can become a scientist or a "smart person" by believing that one is smart, but by admitting one's own stupidity and letting the environment/surrounding reality tell how things are.
Great design - and great presentation.
i'm no rocket scientist, but that surely looks like a manual transmission if i ever did see one.
+nick haydu I think that the planetary gears are what is used in modern automatics. Standards have parallel shafts with gears that don’t orbit the shaft. The “brakes” are hydro or electric operated to control the gears, not the ones that stop the car.
Stick to your day job
thanks mate. watched a few video on automatic transmission. this one was the best
How the fuck do you do this with one planetary gear set with reverse. You are a genius
Great design, but why didn't you increase the mesh resolution a little bit so the big cog is a bit more rounder?
Except that automatic transmissions don't use complex planetary gear systems like that. They use pairs of simple planetaries.
When James Black wrote "its actually manual" I think he was joking... since you are rotating the thing by hand it is manual.
Why did the crunch sound make me die of laughter 💀
thats a pretty sweet model
you should donate this to mechanical engineering department in university or college so that others can benefit from your hard work. it will help students understand the gears and basics better. thanks for sharing
Nachiketa Pandya
screw donating. You should sell them for a grand a piece
Paint them gun-metal grey, all them 'Military Grade', and sell them 10 grand a piece to military schools.
Why shouldn’t he benefit from his hard work?
Great demonstration. I assume those herringbones keep every thing in alignment. Thanks for posting. Later, Rick.
Wow! I love it. I'm thinking about printing one of these. Thank you for sharing.
Beautiful demo
This would be an amazing teaching tool. Do you sell these complete? I don't have a 3d printer and I don't know anyone that does.
Impressive effort! Thanks for sharing. Is there a "how you did it" video planned?
Build a vehicle around it! Awesome job.
Its not as easy as it sounds, with the 3D printer he probably used you would have to print out almost 350+ parts to make just the body. Using a Objet1000 would still take 30+ parts and thats a 10,000$+ printer. Not to mention a lot of money worth of plastic molding materials. It would also take a 4+ Hours for each part. Overall its just not worth it yet. The technology hasn't advanced far enough to do that as a personal use. Only companies use Objet1000 printer because they're the only ones who can afford to buy it and pay for it.
ChopStix nice to know! I really don't know much about 3d printing.
ChopStix It would be a lot less complex if you built a vehicle on two wheels.
Stoney3K Theres also a lot of problems with building something on two wheel, unless you mean a motorcycle which wouldn't technically be classified as a "Vehicle" but as a Motorcycle.
Direct drive is one to one and most times it is 4th gear. 5 up are overdrive gears
And this kids is why you should just use a ball lock shifter if at all possible.
No wonder they're much more complex than manuals.
wonderful job done brother.... finally, your video me to understand auto gearbox!
Congrats! very good JOB! Tnks for the 3d design!
Thank you for a clear and concise demonstration!
Superb! Great model and demonstration!
Pretty cool model!
we need more people like this
Very cool... Good that you've used Matlab for your calculations... Good work man!!
That was nuts dude
So you have 3 inputs with 2 states for 1 output, so you'd technically have 8 possible arrangements (2^3 gears) so what happens if you put it into the 2 missing states of this video?
Bro, only to say is... AMAZING!!!!
God job!
Thats awesome work Emmett
Nice work!
I feel sorry for all of these ignorant people.. This is a model of an automatic transmission. It is not an automatic transmission. It is not supposed to operate automatically, because it is just a model. Just like you can't drive a model of a car.
TH-camrs tend to be complete retards. At least the ones who post the most comments, so not surprising.
Cobra Was Taken It is a model. of a manual planetary transmission. a model of an automatic would shift automatically.
Rahmi Acar so a manual transmission. an automatic trans is a manual trans controlled by a computer.
Rahmi Acar exactly. this is a manual planetary gearbox.
anyways , title of the video still bullshit ....
That's really cool and good work on the model! Do you think you'd be doing a 3D printed model of a Manual Transmission?
Nice model, but IMO plain gearbox is less complicated & with less gears
Thats amazing! Itd be cool if you hooked up a micro controller like the arduino or a raspberry pi and had it shift while turning, but I imagine that would be pretty difficult :/
technically all transmissions are manual. automatic transmissions just use the speed sensors and pressure lines to move the gears, still manually controlled... by a computer.
WOW This is so cool! Did you build this entirely with a 3d printer? If so, could you point me to the models you used? This would be a cool gadget to add to my work table. Thanks!
Well I found it on thingiverse. Thanks! Great work!