HOW IT WORKS: Planetary Gears
2024 ж. 1 Мам.
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Epicyclic gearing or planetary gearing is a gear system consisting of one or more outer gears, or planet gears, revolving about a central, or sun gear. Typically, the planet gears are mounted on a movable arm or carrier, which itself may rotate relative to the sun gear.
Engineers still rule the world!!! Isn't it kind of amazing how these old films did such a great job of educating. Thanks for converting and uploading this......
This is the second black and white video that as answered all my questions that CGI could not.
+Aaron Dreher What was the first?
+DOCUMENTARY TUBE I know of one that explains differentials. It was really good, and it's black and white haha
+DOCUMENTARY TUBE The "differential" one was a ford film. They have also released one on "suspension".
yeah that differential one was the other one for me too lol
They didn't have CGI so they had to go with practical effects and physical models. These 40s/50s/60s instructional videos are the best.
These ancient videos are still as relevant now as when they were made. The basic fundamentals haven’t changed, and usually they are very clear and easy to understand.
old video very precise and remarkable
amazing how much better people use to be at explaining stuff, by actually showing you stuff
I think a reason why some poeple find this better than CGI is the Narration style added to the visual demo. The demo is laid out in a way to make everything easily visible. Where as in most CGI they make the mistake of taking apart the example, explaining the part, the cramming it back together in it's most compact form, with out show what each of the individual parts do.
Documentary tube has taught me more than CDX MLR (Maintenance and Light vehicle Repair) did. Thanks Doc.!
+Kenneth Ebel You're welcome - thx for watching!
+Kenneth Ebel I agree I'm doing IMI LV3 similar to your course and this video is 100 times better than what I've been having to follow in class.
I tried watching three modern videos on planetary gears before this one but still didn’t understand. This was very clearly explained and practical.
This old video is much easier to understand than most modern vehicle driving descriptions.
I see a lot of comments that indicate a desire to understand. Let me try to boil it down. A planetary gear set has 3 parts: The central "sun" gear, the three small pinions (planets) mounted on a frame (a planet carrier), and a ring gear around the outside. That is a simplified set. The Sun, the planet carrier, and the ring gear, they all spin, at different speeds when the drive is turned on. The drive is the sun gear attached to an engine. Hydraulically controlled clutches and bands are used to control the three rotating groups. By "control" I mean a group can be "held" from the outside which makes it become stationary and act as a reaction surface (reactionary). Or it can be locked to the shaft by a clutch which makes it a driver, or it can be neither held nor locked which allows it to freewheel. If all clutches and bands are locked, the gear unit binds, and turns over as one bound up clump giving you direct drive, or as if you had no transmission at all. So the question is do I want to attach my wheels to the planet carrier and use its rotational speed, or to the ring gear, and use its rotational speed or do I want to bind all the gears and use that rotational speed.
15 minutes ago I didn't even know something called 'planetary gears' existed, now I feel like an expert
We stand on the shoulders of giants.
Want to really expand your mind study the Toyota/Ford Hybrid transmission with its motors and planetary gear set. Very cool.
Ty for this
that led me here :)
FWIW Nissan also used it.... before going to a Serial Hybrid, it markets as e-Power...
its weird how 50s documentaries give me better explanations that videos now...
Normad Straight to the point on the fundamental principles of planetary gear systems. There's no "fluff" here.
It is probably because they are stripping it down (the transmission) and adding the more complicated layers later on. It could also be that the videos gave more informations thanks to better attention spans back then.
"What's up guys, Gearhead69 here, comin' at cha with another video about GEARS! Be sure to like and subscribe, big shout out to all my subscribers on Patreon..." ...2 min 35 seconds later... "But now let's talk about gears!"
@@scatterbrainart ^ this
Yeah, FINALLY I understand planetary gears! Finally.
I love these old videos
One of these contraptions should be in every high school.
And even preschool, I remember playing with these as a child and I'm pretty old now...Some of us are visual, while many of us are hands on...
@@outcast668 , That would keep the school nurse busy , when preschoolers get their hands on one of these models .
This is fantastic training
Violin pegs with "planetary gears" drew me here. Now I know what a planetary gear is. Thanks.
looks like a T26 Pershing tank This video made Machine Dynamics easier for me to understand. Tanks ;)
People making digital animations of mechanisms really have to watch a lot of these old model demonstrations. I always find them much clearer to understand because they show just the simplest elements without all the bells and whistles, but they also usually show the whole thing without leaving out critical components (because an actual model can't work without them). In all the animations I've seen, they never showed what the ring gear actually connects to. (Or mention that it connects to anything.)
Hmm. Did you actually watch the video and try to understand it? Or are you one of those "They don't make them like they used to" types. This video is unclear and the cuts to the young soldier show no detail and barely correspond to what is being said. Cuts to the tank are useless. And the ratios are intuitive with prehistoric math. This video helps to confirm bias. It's only value is the 5 rules and they only make sense after one understands why. As presented they cannot be used to predict motion. Old quality videos exist, just like new quality videos. This is neither.
"Thats pretty complicated, so let's look at it again" Me: "OMG thank you!!!" xD These videos are so fun to watch, both for the nostalig factor and their superior comprehensiveness (if thats a word ^^) :)
nostalgic factor? Were you alive in the 1950's?
@@scpfoundationtm1249 I don't think nostalgia is limited to your lifetime, though you might call it romanticising at that point. The whole magma/lava-thing ;)
@@NochSoEinKaddiFan i think nostalgia is specific to personal experiences and memories, but they can still convey an old school feeling of course :)
@@NochSoEinKaddiFan Was born in 69, If I had a time machine I'd go back to the 1950's and then I would take the biggest sledge hammer I could find and I would absolutely destroy that time machine. (after I check the lotto numbers of course)
i guess im asking the wrong place but does someone know a trick to get back into an instagram account?? I was stupid lost my login password. I appreciate any help you can give me
very consise and instructional :) I can see how a possible CVT can be made for a hobby vehicle as I gained understanding how planetaries work. Some of these govt motor pool movies are still of great use!
before I saw this, I was puzzling over a small project vehicle. now I can visualize the principles making it possible for me put it "the hell" to use :-)
I love how they cut to some B-roll of a truck backing up when the narrator is describing vehicles moving in reverse. I might never have understood without that illustration!
Excellent presentation....
fascinating ingenuity ...
Good learning and make understand the basic of Planetary Gear Reducer Speed and making Torque....Thank you very much for your kindly me and the more Technician and Engineering people
This is a re-upload and edited version of a video called "Planetary Gears, Principles of Operation (1953)". Both are Part 2 of a Military training film introduction to planetary gearing. Part one seems to be lost to time.
Part 1 is here as well. I just watched it now. Look around
I'm binge watching all of these... on my 4th one
Beautiful !
now this is a great educational video. thanks.
Excellent video!
The narrator has voiced a multitude of educational/trainning videos, he also done a video about nuclear blasts as i remember.
wow dejavu I seen this video back in 1983 when I was in the Army being all I could be a mechanic .these are videos that were used in class at times .
Okay Joe, nobody cares.
I'm gonna say wobble stick instead of joystick from now on.
In the case of two inputs, the last one shown, what happens if the sun and ring gear are rotating in the same direction but the sun gear exceeds the constant speed of the ring gear? I am of the opinion that the planet carrier still remains in between the ring and sun gear and still rotates in the same direction. Am I wrong in my assumption? Also, in the compound planetary gear setup he said that the planet carriers of the intermediary and reverse sets were connected via the output shaft, I am trying to understand why that is necessary since the planet carrier of the reverse is reacting to its own sun (rotating cw from the intermediary ring) and its own stationary ring gear. Can someone please elaborate?
best explaination with all doubt clearing views
great explanation
Nice demonstration
Hello Need ur help urgently.. I have material Lifting Machine of load capacity 300 kg , which is placed at 15th floor. And connected via single phase 3hp motor and rubber with wire rope drum. It only works for uplifting the material. But I want it as work for both uplifting as well as downlifting the material. Which gearbox I would buy and in which ratio so that I could get speed of the machine maximum 35 - 50 mtr/min for uplifting and downlifting the material. Or any alternate available. Please reply
I love these video.. nice and real.. super alsome to watch
Fascinating.
Old is gold
I was quite confused at the first part until they explain how the ring gears, sun gears, and output gears interact.
Did you figure it out
Funny I never knew this despite me being a tank driver in the army from 2010-3013.this is great information
Is it common for the ring gear to be on a bearing ? Seems like a very expensive bearing and lots of wasted energy by friction when it's in that mode
Me sorprende que siendo videos tan antiguos llegan a explicar las cosas de manera tan sencilla y entendible, obviamente sin meternos en aspectos matemáticos. Recuerdo también el video del diferencial, gracias a ese video lo entendí perfectamente, creo esto se debe a todos los recursos "didácticos" que ponen en cámara, es mas sencillo entenderlo cuando existe físicamente.
love these old videos but i need a advil now
BTW 9:00 Explains the principal through which the Toyota Prius' eCVT works.
I wonder who came up with the idea. Brilliant...
james watt who was first discovered planet gear system
Ikr these guys brains were operating on a completely different level.
you know what, after this I could say I understand how they function.
When I want to know how something works, I look for one of these old videos.
I never could understand gearing from watching youtube videos. I try so hard, too.
Only for planetary gears, this is normal. It's not that intuitive to have an inward gear...
Great clear language.
Excelently informetions is one vídeo amazing.
Amazing
thanks is good to know
Very nice
Isn't this the similar machanic of Toyota Hybrid Drive System?
Yes, both the Toyota HSD and Chevrolet Volt utilize planetary gearsets.
Correct me if I'm wrong but I think all automatic transmitions use planetary gear sets
Brendan Kelly not quite. Honda and Saturn has some that are quite similar to a manual transaxle but utilize clutch discs instead of synchros to change ratios. Also there are newer style cvt and such that do not use planetaries. But most still do lol
i like how the gun is facing backwards, cofused em for a bit
is 12:1 reduction give more torque ?
+Dante hollow When speed goes down torque goes up when the power is constant.
yep, if u do reduction u convert the speed to torque and if u do the reverse u get more speed but less torque ;d thats what i know not sure 100% :D
you are 100% correct. If you crunch the numbers, the output power will always be slightly less because there is friction between the moving parts, but the rule is true.
what if the input is given to planet carrier and there is no reactionary??? please help!!!!
+AKASH SAXENA 0.18 No reactionary = no drive :)
Cool. Tanks away
It worked for tanks in those day's, and can't break down, so that's the reason Toyota uses it on every Hybrid car today.
ANY automatical gearbox work's by this principal .
@@Definitely_the_best About time then that you open a automatic gearbox. You will be surprised what you find in there.
Wish they used standing labels. I watching this twice going "Which one is the planetary gea.... no wait.. that's the carrier so the...wait"... Labels are always good.
Still a bit hard to grasp, but this one is the clearest on explaining how this works. Just wish they had changed the mono audio, because my right ear hurts like hell.
Try Equalizing the audio output in your PC settings.
what is reduction,
I believe the proper response is "what."
Don't try and do a burn out!
Thomas Chase I yjj
I thought I was watching Elvis in Wooden Heart when the video started.
who is Henning Thode? the home next door to me was built in 1895 by Henning Thode, Owner of the Union Brewery
' BMT as battle main tank must have 2 clutchs with one motor
this is like my relationship status "complicated"
GOOD
Sombody should supply a desk top model of this mechanism.
Oh, no... I can imagine multiple planetary gear-sets giving me trouble at some point :/
I just watched it and I still dont understand it
Second time i watched it.. still don't get it :-) Need some CGI and better (newer terminology I guess...) It does not explain the clutch system... and the gears are too complex to easily understand... or it might be that I'm just too stupid to understand... and the later might be the one to bet on...
canada dark:)
rinse ... and repeat ... LOL
if you think this is complicated, imagine HAVING TO DESIGN these
Can anyone identify the tank being used?
looks like a patton, or pershing, wasnt paying too much attention to it TBH.
fakiirification yeah, it looks like an M47 Patton
Toyota hybrid in the '50s...cool explanation
Basic rules are important
I thought planetary gear set is modern tech. I enjoy this channel though
These gear/member equations, are indeed; TRUE! Do the math!!!
faith in humanity restored
Make a mobile app of gears would make us understand better :p
My brain hurts.
I think this video is prepared for the tank tecnicians for the traning purpose.in 1950's.
A perfect example of how language itself makes understanding convoluted ideas extremely difficult. A simple cartoon with arrows would be easier to follow.
Very true. Especially sine they don't define the terms they use in the video.
Nowadays this could be explained in a 60 second 3D Animated video.
+Rainbowforce5 this is a fragment of a larger film. Notice there was no introduction, or title. I'm assuming definitions and basics were covered earlier.
lookoutforchris Probably. It still doesn't do a very good job though.
Tank
the first figit spinner
Mister Sergeant Sir I don't understand. Could you please, maybe say it different?
More modern than 2018
I thought this was going to be about planetariums. :{J
👏🏽👏🏽👏🏽👏🏽👏🏽👏🏽👏🏽
y en español cm hago
Naah i still don't get it...
The outer ring is fixed in place, and has a lot of teeth. The sun gear is in the center of the ring gear, and has only a few teeth, since it's a lot smaller and the teeth must be the same size. The planet gears (usually 3 to balance the loading around the sun gear) have the same sized teeth around a gear circle exactly the distance from the sun circle to the ring circle. As the sun gear rotates once, it's teeth make the planetary gear turn the same number of teeth, and since the planetary is connected to the ring gear as well, it travels around the ring the same number of teeth. For example, If there are 20 teeth on the sun, and 100 on the ring, that means the planetary only goes around 1/5 (20/100) of the ring as the sun gear goes around once. That's your gear ratio: for every one turn of the sun, you get 1/5 turn of the planetary around the ring or it takes 5 turn of the sun to go once around the ring, or 5:1 reduction ratio. The planet gears are held in a carrier frame, and there is a shaft connected to that frame that can drive a pulley, gear, wheel, or another set of planetaries, to reduce the speed (and increase to torque output) again. The sun gear is usually the input (like the drive axle in a car), the ring gear is the anchor surface (like the road) and the planetaries are like the wheels that carry the car along.
@@waldolost5181 Makes more sense now thank you!
gears. is there anything they *can't* do? no really, I need to know. ...
My granddaddy taught maniacs at Fort Knox. I bet he used this video.
"maniacs" I like that :) .
#ATHAMTV
I want that on my bysicle
Good thing there are a few types out there, the NuVinci from Fallbrook Technology (ball type, 2 models), Sturmey Archer, Shimano Alfine (3 versions), and Rohloff Speedhub (two widths and a number of different set-ups of operation) for hubs or mid drives (special applications per type of bike frame). Then there is Schlumpf with two mountain and one road or speed gearing and also Pinion which makes 4 models (18, 12 andd two variations of the 9 speed) of pinion type planetary gearbox (crank) set. Not counting the others still in prototype or testing.
lets make a tank guys
lets make a giant dildo guys
Bilkul dimag ke upar se jata hain Planetary😂😂
Common core needs to take some pointers from the generation who made this video...