Building a Planetary Gear Transmission in Scrap Mechanic!
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- Опубликовано: 28 фев 2022
- Hey everyone back again with more Scrap Mechanic! Today we are building a really cool gear project, a planetary drive transmission! We've completed other gear based projects before but one of the coolest mechanisms is a planetary gear setup for creating different gear ratios in a fixed mechanical system!
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Planetary gears are super cool, I made a horrible one with legoes ages ago. Being able to mess with gears freely and with some restrictions gone ("nonexistent" connections with suspension, etc) sounds awesome
hooman
I've tried with little success to make a centrifugal clutch. Would like to see your interpretation.
Did you try it with pistons or with suspension?
@@Cro_man_ suspension in a compression direction. Because you can turn up the spring load and "tune" the clutch. The biggest problem is the dumb suspension glitch that they haven't made toggleable yet. If they would just make it like the "switch or button" mode on a sensor, the use of them would be so much better.
@@Ameritude maybe try with piston becuse they are like weak when at slowest
Could use an electric motor or steam engine in game. Those two machines do not need a clutch.
@@tailsdblack463 no no you dont get it its like a protoype
Yeeees, i love all of these mechanical builds, but if you put together two 4 tooth, 5 in diameter, gears and offset one 45 degrees, you would get one 8 tooth 5 in diameter gear, where the teeth are actually exactly the same distance from the center. It would be way bigger, but I bet it will be waaaaay smoother and skip less. You could even use the same principle to make the ring gear better too.
The actual math on these is a little more complicated than the simple tooth count that works for normal gears. If the planets were stationary, and just transferred motion from the inner to the outer, your 4/12 --> 1:3 math would be correct. However, the planet gears' walk around the outer ring adds 1 rotation to the output shaft every time the tooth ratio completes a cycle, yielding (4/12)+1 --> 1:4. Starting at the 15:04 mark, you can pretty clearly see that the output shaft is hitting 9, 6, 3, then 12 oclock when the input hits just between 9 and 10 oclock, demonstrating the 1:4 relationship. The math gets even more complicated when you start moving the outer gear as well. I'm not as confident in this part, but I think every 1 rotation the outer gear does adds (tooth ratio minus 1) rotations in the direction it is spinning, so in this instance adds (4/12)-1=2 rotations to the output shaft. The 1 is negative here rather than positive like it was before is because the planetary gears' walk is functionally opposite the direction of the outer ring rotation.
Edit: My explanation on moving the outer ring is definitely wrong. It is impossible for one rotation of the outer ring to add more than one rotation to the output due to the walkback. In fact, the math is identical to the motion of the sun gear except that the 1 is still inverted, meaning the gear ratio of the outer ring is (4/12)-1 --> 1:2, not 2:1 as I initially claimed. However, what is really interesting (and I completely missed the first time through) is that these ratios don't combine to give a final ratio, they are simply the same solution from different reference frames (ring stationary vs sun stationary). To actually calculate a final output, you would start by finding the output relative to either the ring or the sun, then add in the motion of whichever you chose relative to the world.
do you naturally understand the math and interaction of these mechanisms or did you have to teach yourself/learn over time?
@@danzo5521 I would say it is a combination of both. I definitely have a natural propensity helping me to understand and visualize these kinds of systems, but I also spend plenty of time watching math youtubers to understand things that don't make intuitive sense. For example, I have definitely seen at least one video on the math of circles walking around circles, so I had a learned understanding that I applied to this situation to the best of my ability.
@@amagicion5130 the circle math is really interesting to me and I until now haven't found anyone else interested in it.
You gave a mathematical explanation, i just saw that the input rotates 4 times while the output moved once
I love seeing these kinds of mecgonizoms recreated in scrap mechanic. Scrapman did a video on making a cam and follower set up. So fun seeing. Love the engineering.
I feel like you'd really enjoy Besiege. In my experience it has the best physics engine I've ever seen for a game.
That is one of the few things I wish we had in scrap mechanic. Gears would be so helpful in a build what you want survival game. Same with wings... If you've figured out engines and thrusters. Surely you'd also have knowledge of gears and wings.
This gear transmission is outta this world.
I likee these mechanical builds way more than aesthetic stuff, please make more!
This is extremely cool, not going to lie. Automatic car transmissions are more complex than this (and not built in 90* increments) since they have 3 of these to make a 6-speed + reverse transmission. Theres a very good video by "Practical Engineering" or something like that.
i wanna see kan and scrap man partner and make a full size car using all the mechanisms they have created so far, then adding as they create more
Cool making planetary gears
I tried making a vanilla gearbox (haven't finished yet) and have used many different parts to make micro changes, at the end of the day gear ratio improved the controller speed (so now "free energy" cars can be faster) but any engines worked better with direct connections to the wheel bearing and stalled out or slowed down when using gear ratio.
Anyway - I learned that you need to use different size pipes between gears, so for example I have powered gear A with small pipes and free gear B with thick pipes and that way you get smoother contact, you were right to use curve pipes, straight pipes always get stuck, you just needed to use correct for SM blockiness with different thickness.
Also a tip if you ever need cones, in the parts there is only 1 part that kind of has one block cone collision, others are cylinders or cubes - "Encryptor Holder" I use it for 90 degree gear connections.
Works amzingly good for the low resulution!
Couble 2-3 to make an actual automatic.
Would be very cool and should definetly work!
Always blown away by your builds.
You could build that open diff a lot smaller, I managed it in 3x5. Fun concept thought.
tractors also have this mechanism in the center of the wheel. the input shaft rotates slowly and the output shaft (the wheel) rotates quickly, this ensures that there is less stress on the engine and the gearbox.
i think its the other way round
Planetaries are extremely versatile. The entire reason some of the two-tracked tractors can steer is because of these. They essentially use each output from a differential as the "sun" gear the planetary. The ring gears are spun by hydraulic motors which are controlled by the steering system, and the "planets" are the output that ultimately turns the tracks
I love those little projects that are more involved! Good job. Would you try to recreate it in main assembly? That game has much more freedom when it comes to creations.
we use these a lot in FIRST robotics for gearing up/down motors, awful to assemble but very satisfying and compact
Kan just makes the best scrap man videos
these the types of videos i love
Some time ago when I made a piston car with a clutch and transferred the power with gears I experimented with mixing small and normal pipe pieces to get a tighter fit. Worked decently for me
Would love to see a V8 piston engine, also would be cool to see you make a a V12 and make a plane like the spit fire with it.
That's so cool. You should mount it on a vehicle.
Most cars have open differentials too.
Really good I love your videos
The Prius uses this kind of mechanism for its powertrain where a gas engine and two electric motors are attached to one planetary gearbox. It's really cool!
Looks like this game is getting very educational
My fwd car has a open diff and it’s fun as hell when one wheel spins unnecessarily 😂
kAN is so talented in Scrap Mechanic! I cant maje this things without his help.
4:06 "now we can, of course, mount this c̶o̶n̶c̶r̶e̶t̶e̶ to a rigid member"
Scrap Mechanic needs a miniature build system, like you build something and then in your lift you can make it small for like a transmission.
i kinda wanna see a fully automatic transmission on a car with multiple gears, like 1st, 2nd, 3rd, etc.
You’d have to lock certain bearings using logic and controllers and you’d need a way to sense rpm and/or speed. Maybe have calibrated weights on a spring attachment to the input and drive shafts that move above a certain rpm that can be read with a sensor?
@@Dozav7 i wonder if how they do it in real life could be translated into scrap mechanic. i know real life auto trans don't need any sort of electronics unless it's a certain type
small pipes mesh well with paper towel rolls.😉
Just to be that guy, pointing out tiny correction. LSDs or limited slip diffs aren't used on majority of cars, usually only on higher end performance cars as they are more complex, more wearing parts, more expensive to repair etc and only really a big benefit when your engine can and are often riding limit of traction. So most road cars just use simple old open diff
Scrapman: imma build old stuff
kAN: imma build modern stuf
"Nice"
Try a lineair synchronous motor (LSM) the one that is used to launch you on a rollercoaster. Or a harmonic gear reducer
a series of planetary gear sets would create an automatic transmission which is cool if done properly in scrapmechanic though really hard.
I’d love to see him try and build a working car with the planetary gear system on here
Transmission Gearbox - Number of speeds :
5 speed Manual Transmission relations
Transmission Relations
1st Gear Ratio: 3.00
2nd Gear Ratio: 1.89
3rd Gear Ratio: 1.28
4th Gear Ratio: 0.94
5th Gear Ratio: 0.71
Reverse Gear Ratio: 3.14
Final Drive Ratio: 3.86
The Allison transmission actually uses I believe it's three planetary gear sets to create all its gear combination
Use the Mechanical Parts mod, you can make some crazy stuff with it. The ACL and Old Modpack gears hitboxes are now broken after the survival update
You should make a whole vehicle with all the different parts you have made like the engine, differential, and the transmission
Did you try using the gear in the mod pack or are you just showing them as an example so you can display the Planetary Gear but using the Vanilla parts?
Marvelous video kAN!
How about you trying to make a Wankel motor concept?
It's a motor without pistons and cylinders like usual 2 and 4 stroke engines.
i never understood the point of a planetary transmission, never thought i would find out in a scrap mechanic video
The thicker pipe pieces probably would've meshed a bit better.
Have you every tried doing like a fully realistic car with a piston engine, a transmission, a differential, double wishbone suspension and all the other things a regular car has?
I would think with elbows and controllers you can get better spacing on the "teeth", I think. I think. Just a thought.
I wonder if a Wenkel engine or a liquid piston engine would be piossible..
Wdym possible? It's scrap mechanic. Engines don't really work at all, mechanically.
you should make a cycloidal drive >:)
ive just started the vid and i can only imagine the clipping hell this would cause at high speed
I counted 1:4 not 1:3. Cool mechanism though and surprised it works in SM.
You and scrapman should come up with some bits and pieces separately and see if you can make one giant machine without knowing how you two are making each others assembly
This could work as an analog computer, at 17:30 you're basically doing addition with an analog computer.
Hey Kan you should do a gear vehicle race
So what if you extend the ring gear out and use extended pipes and a bearing to make another tooth so to speak it would line up in the middle
I had no idea planetary gears were in automotive technology. It seems like it'd be too fragile or complex for a long term installation like a vehicle... But that's neat to now know. I suppose that's partly why auto cars tend to be more expensive from the factory with all of those different clutch systems and whatnot. I can also see why CVT is becoming so heavily integrated into car tech.
That's an interesting question... Is a CVT possible in Scrap Mechanic? Rotating shapes and pistons and all that.
I mean planetary gears are even used in tanks to reduce the speed of one track compared to the other. I believe that the shaft was connected to transmission and the ring gear to engine. That way it also turns on spot in neutral. One planet gear set per track. :) Sturdy hunks of metal those things. Also too heavy for one man to lift.
maybe with mods, I don't see it working on vanilla maybe a semi cvt like it goes in steps as the input goes faster, so it would look like a geared bike, the chain or belt used for the CVT would be the biggest challange to solve without mods.
But maybe I am compleatealy wrong, and there is a mad lad out there to prove how wrong I am. Honestly I would love to be proved wrong about it. it would be a very neat system tbh.
@@rhazien2502 Making/finding a cone would be the biggest challenge unless there's a part I am not aware of... Setting it up with a universal joint on a slightly rotated chassis would allow a wheel and piston to track over it and create something not entirely unlike a CVT... Probably be buggy as bananas though.
@@Madnessnunky yah, but modded cones are very easy to find, guesss I have been playing with mods too long and forgotten they are not vanilla lol.
but yeah your idea has some merit, it might work, but again be really buggy.
@@Madnessnunky I saw someone else mention an encryption holder as the only cone shaped block he uses for 90 degrees gear connections
I think the t-pipe pieces work best for gears
Tried once to make a dual clutch transmission oit of lego. Would love to seenin SM
what about using the small curved pipe pieces on the sun gear and the long pipe pieces on the planets?
Transmissions have 2 of these sets of planetary gears with the planet gears being the input at least I think so my auto trans class is in a week so I'll be learning more then. Calling this a transmission is like calling a slice of meat a sandwich.
To my knowledge I believe there’s three different designs of this.
1, Planetary gear hub
2, Sun gears
3, Spider gears
@Burnout nation Sun gears are used on heavy military vehicles and monster trucks. Because they can apply insane amounts of torque with little stress.
Spider gears are sometimes used in RC motors.
arent the retextured gears broken, last i checked the hitboxes were all messed up
Should have made the center yellow longer and keep the rest rounded
How about a gear engine powered by "Scrap Mechanic's Unique Physics"
Like the wheel with a wedge pressed into it powering a brick using gears to change the speed to torque.
Kan. You built exactly the kind of think i was looking for lmao, ive got this stupid piston engine but it spins too fast even with the reducer on the end
Weird, the one thing I’ve heard and seen about piston engines in this game is that they don’t have enough speed. Is it on the workshop?
Checkout gear down for what, great gear explanation also rare and pointless gears ideas I just find awesome.
My truck has 4x4 and my rear is a limited slip but my front is a open diff which is annoying when i wanna offroad but i aint got money for a lsd swap yet
what about Torsen differential next?
If you put power to the planetary side, instead of the sun side, would that result in a speed increase?
I think this gear is usles because, hou you will rotate this gear without other gears?
automatic fwd cars use this. well. some do. idk about all of them
i beg of you to check out the gearblocks demo its astounding and then remake this in that game
Build a tank with that with a drive like that
You just amaze me and you seem like an engineer with the contraptions you build ant the type of logic you do in scrap mechanic.scrapman is the complete opposite
He is
In real life, how would you change the speed of the ring gear to "switch gears"?
Kan paints his bearings?
On my cilo is an open dif
That’s actually what they use in tractors
Do a research with the exsploldeng engine
I would like to see Kan make a swash plate for a single rotor helicopter. I've had success in doing this but can't do the logic so Kan if you may.
What logic? You don't actually need any logic blocks for it. If you do a fully mechanical swashplate with a cyclic, all you need is some pistons to move it around.
Also, single rotors are really difficult to balance properly with their weird half-gyroscopic forces and dissymmetry of lift. (Although, that last one can be fixed with extra mechanisms to make the blades themselves counter it)
@@nikkiofthevalley you're right but I've already gotten the hole swash rotor assembly working and functional, and like you said with the semi gyroscope effects, I really need the logic for auto stability.
@@nikkiofthevalley also I tried using a fly bar to mechanically stabilize but although it did work the faster you rotate the blades the bearings got weak and parts became misaligned.
@@simplyengineering.3013 Could you upload your heli to the workshop? I might be able to balance it for you. (And I'm fairly proficient with logic, so I might also be able to add stabilization logic as well)
@@nikkiofthevalley ABSOLUTELY, that would be great I've literally been sitting stuck on this project for over a year now I'll attach the link here when it's ready.
I can't get the ACL gears to work and don't know why. Any ideas?
try building a car with alot of funcional gear parts etc
THERE IS A NEW MOD CALLED "mechanical parts" WHERE YOU HAVE TODOWNLOAD BLUBRINTS LIKE GEARS, BEVEL GEARS AND, JOINTS AND MUCH MORE! AND ITS COMPATIBLE WITH SURVIVAL UPDATE!! ps. i built car with differential so i think its even better than old ones
just make a car with every component that makes in functional irl
Ur the mumbo jumbo of scrap mechanic
What happened to survival?
use it in a tank brick
watching this well skipping study hall
more scrap mechanic and railroads online pls
omg it's kan
Can you make a mechanical clock in scrap mechanic
16:00 it triggers me that you can easily count four turns of the back pin during every turn of the front pin and he still says “it should be three without the skips”. If it would need like 3 1/4 turns of the back pin, i would be totally fine, but 4 instead of 3…
On the math, you always add 1 to the result
Hi kan
It's 1 to 4... Just watch it.. it's actually 3.5. If it had the 4 more pegs on the outside.. 16. It would be 4..
put the system into a car but use pision engines with it...
do you answer comments?