Understanding Universal Joint
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- Опубликовано: 5 сен 2024
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The working of Universal (Hooke's) joints has been a mystery to most of the people even though it was invented many centuries ago. This video clearly unveils the physics behind it in a simple and illustrative way with help of animation.
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Hey, your videos have helped me a lot,seeing that you are an Indian , I felt proud,so I decided to make a contribution ,but as patreon will charge my card in foreign currency, that will just be a waste of money,instead if you could just let me know your UPI id, I will contribute directly as much as possible every month!
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Thank You So much keep making great content!
Can do you make your rear wheel drive vehicle move if one of the rear wheel is net having firm contract with ground?
I understood the basic concept of a U-joint, but had no idea that the output speed wasn't constant. Very interesting. Thanks for the video!
now,,, why the output speed iznt constant?
VontekSRB because the propeller shaft is inclined to transmission shaft, so due to that there will be not the exact transfer of rotating speed or motion. And thus in final drive also the angle will be different hence no constant velocity.
I had trouble as well seeing why but imagine If you push something straight along a line determining it's speed or pushing it at an angle compared to the line. Even if you push it just as hard, you will cover less distance in the initial line's direction and thus your speed will be less in that that direction. Now imagine you zigzag push the object compared to the line. Your relative speed will vary, depend on the angle compared to the line you're pushing along. Regardless of giving a linear, unchanging push on the object. This is the same principle as the constant torque, constant velocity input of the input shaft giving a fluctuating velocity output when the output shaft is at an angle. Resulting in jerky rotation.
so true. im wondering now how a front engined rear wheel driven vehicle can operate so smoothly and the final part of the drivetrain is not jerky.
DangerDaveFreestyle I'm wondering if the rear drive shaft having two U joints gives it the same effect. The front U joint that is up by the yoke to the transmission and the rear u joint going to the rear differential. Does that make a driveshaft a CV (constant velocity) axle without the name?
Universal joint: I'm complicated
Automatic transmission: Hold my planetary gearset
*proceeds to break down at 10 000 km*
I have an automatic bike. Been 6 years and zero problem other than the odometer, speedometer, and the old battery lol.
@D ʝả ħ AT's are for people who have better things to do with their lives than wasting time shifting gears
@@Vi-pv3xi automatic bikes use cvt and not planetary gears
you sound like a lazy american
One thing that should be noted in the last example (double U joint): The input and output shaft have to be parallel for the velocity to remain constant.
In other words, along the same axis of rotation
In other words, along the same axis of rotation
this video turned a simple concept into a total mind fuck........thanks :D
always trust americans to do that lol
"Now you understand how an universal joint works. Thank you."
No. Thank YOU!! :oD
+masterimbecile Exactly what I'm thinking after every single LE video. "...Thank you."
NO! THANK YOU!!!
:D
gabrocki Same here.
masterimbecile
Me neither
There are literally three parts...feels sad to be silly huh?
Upping my Lego mindstorms game
Wait hello what
oh
Ikr
This has absolutely NOTHING to do with my education but I still watched the whole thing xP
+XelPixels Your education has NOTHING to do with your life, the universe and everything, so good that you watched till the end.
+Aditya Mehendale no offense, but that comment was just stupid.
+XelPixels No offence taken; I was just feeling stupid at the moment. Or maybe wise.. or just "wiseass". Who knows.. IMO, though, cool video/concept is cool - you don't need ratification from your 'education' to enjoy it.
+XelPixels Actually, there really was nothing stupid about that comment. No offense.
There's no need to stay stuck to a matter,you would be surprised at how much you can learn and be good at
Now I understand how offroad vehicles can flex so much, thank you!
But do you underatand how body builders flex so much?
@@sam_s_ MMMMMMM NO
@@sam_s_ congratulations for roasting a 5 year old comment, plenty of them left
@@csibesz07 I wasn't roasting their comment. Their comment was perfectly fine. It just made me think of a stupid joke. Relax or I'll have to flex on you.
You missed one very important point! The angle of the outputting universal joint must match the angle of the inputting joint. This problem was the source of some vibration concerns with some RWD vehicles and I have seen quite a few "Raise Kits" put on the rear suspensions of cars and trucks that did not take this into consideration. Some of those vehicles shook so violently they would loosen the fillings in your teeth!
The concept of the constant velocity joint was used in the 60's and well into the 80's with what was called the "Cardigan Joint' and it had a very short piece of shaft at the front of a lot of driveshafts on GM RWD cars. A bit more complicated than this video showed, it served pretty well to eliminate vibrations caused by angle variations as long as the final output angle to the differential was under 1 degree.
Exactly. I'm facing vibration problem in my car due to universal joint
"Cardan joint", not cardigan.
"it is clear"
Another superb explanation...You made Understanding Mechanical really easier.
The video is exactly what I needed. He didnt just explain the parts and purpose of the U join, like most other videos, but he also talked about the physics
This is simply brilliant. Really explains the non-constant velocity perfectly.
3:21 you may have outsmarted me but I outsmarted your outsmarted
Many years ago they taught us this at school, when disassembly the shaft always mark the parts and spline with a file so they go back exactly the same, otherwise the Jerky Motion will ruin the drive shaft. Pretty obvious. I hope kids are still taught these basics mechanics
This is graduation stuff. Not taught at school
Thank you, I had no idea about the fluctuation in speed etc, especially the last minute was very helpful!
If you look at light-duty 4x4 trucks from decades ago (50s, 60s, and early 70s), the transfer case was tilted down toward the rear to reduce the angle of the U-joints in the rear drive shaft (the shaft with the greatest need for running efficiently), but this increased the angle of the U-joint on the front side of the transfer case. To accommodate that, they tilted the rear (input side) of the front axle downward. This rotation of the axle position away from the position that "looks right" increased the angle of the U-joint at that location so it was a close match to the steep angle of the U-joint at the front of the transfer case. It's a setup that looks very strange if you don't know the reason, and this video explains the reason.
It seems like everybody is here because they were curious. Not because they actually needed to know. And I think that is great.
The algorithm
Excellent video. This is why when reassembling a tail shaft, it is very important that the marks on the slip joint line up, so the angles on each end also match
You've just make my understanding of the world more complicated.
This is great, thank you for teaching me for free, you deserve more subscribers
There were ads. Not free.
@@vv8104 i think he was referring purely to lack of currency transactions, which is the common way the word "free" is used. In that case it is free, but I understand your point.
keep it amazing man, your voice makes me know I'm about to get better
INCREDIBLY interesting and informative!
This video has made a huge difference to my understanding of this joint! Along with helping me complete my course work, many thanks.
I've been searching for this for over a year and now finally I know how a fwd is able to steer while powering the wheels
They use CV joints, quite a different animal.
Great job.
I am a Uni joint manufacturer but never knew why do people use double joints.
Now I have understood U-joint in a better way. Thank you for making such a video.
Ive been looking for a way to make the fluctuating speed constant again, I can’t thank you enough!
I needed to figure out a way to transmit rotation to another axis without bevel gears and I had no idea how great universal joints were until this video. Thank you so much! You fucking rock!
Wow. Never thought that mathematical abstractions could solve mechanical challenges with such ease. Thanks for sharing.
"Understanding Universal Joint": 82.230 views
"Jen Selter makes squats": 129.655.342 views
Natural selection at its finest...
i would put my universal joint in Jen Selters spline.
yo culpo a los padres
I will watch the Jen Selter squats right after this video
butts are more universal than universal joints
Nice video, especially after smokin some good universal joints 🤙
I needed this video in my life.
This video showed up randomly in my recommendations. No regrets at all :D
I didn't know, I didn't know how a universal joint worked. Lots of pennys dropped like why on cars its a different joint called a CV joint constant velocity. Why the yolks have to be lined up. And why the input and output shafts have to be parallel. OMG. Thank you sir and thank you youtube for the recommendation.
Ooooooo my gosh .......
Never knew that the speed on the output shaft isn’t constant after changing the angle 🤷🏻♂️
Thanks a lot dear for uploading this informative video 😊
Very informative and easy understanding
Thanks so much for posting! This is a concept that I think very few professing professionals even have a clue!
Don't know why I needed to know this but I now feel empowered.
Dunno why this was in my feed, but, I'm impressed by it.
please keep thermal related videos....your animations are simply superb....
Wonderful animation! Made the concept clear as day!
friggin awesome. i never really noticed that u joints have this kind of motion. think of the green dot moving back and forth on one edge of a triangle and the red dot moving on the hypotenuse of the same triangle (thats a fancy word for long side yall :) . since the red and green dots have to move those distances in the same amount of time... the green dot moves faster
At 03:08, your graph shows a non-symmetrical addition and subtraction of the input speed. Not only are the positive and negative peak amplitudes of different magnitude, the area under each peak is also non-symmetrical. I would have thought that the velocity deviation should track the sine of the displacement angle, and that the positive and negative graph curve segments should be symmetrical.
Awesome 👍👍 its so easy to understand. I'm glad i opened youtube to find out. And I'm logging without any other video 😁
very nice animation to show the working!! it would even be better if equation for the velocity were shown or derived...
I loved these videos. Thank you for this video uploader! 🤗
It is clear that this video helped me alot
Great video. Learned something today. Thanks
Such an excellent video I have ever encountered with! It is explained with simple graphs and simple explanations, as well as supported with a simple video, I really enjoyed it, and I am so grateful :)
Thank you very much.
Effort much appreciated.
Thank you. I am trying to build a Lego articulated suspension system with steering. You have helped me understand the universal joints.
Thanks for your support
Excellent video...thanks for sharing.
Thanks for the interactive animation and explanation !
My teacher always told us to use two for balance. I sorta imagined it was something like this but this is a nice video!
Double universal joint is very interesting and important
Your explanation were so clear. Awesome dude!!!
Universal joints are used for the steering wheel connected to the wheel arms and u joints are also used for transferring torque to the wheels when the u joint is connected to from the transmission to the drive shaft
So that’s how they get constant velocity to the wheels, the axels 👍🏿 thank you.
Very useful for my final exam, Thanks!
awesomely explained
I have never thought this would have been this much complex
---- From Corona Quarantine
Finally my curiosity has been answered, nice animation
+unknownvector1 And why do you believe the animation to be accurate? I have seen many animations where Wily Coyote somehow hangs in mid-air before starting to drop; is that factual?
Awesome work.
Please continue the job.
Dullabh Commercials is one of the leading manufacturing & export houses from India. Our export products are in accordance with international standards and have been satisfying the needs of our customers worldwide. Our experience of more than four decades and innumerable contacts enable us to provide our clients with the best of the leading suppliers of Spare parts to the Indian and world automotive industry. We are also among a leading Cardan shaft manufacturers in India.
My mind just got blown. I would have never imagined it wasn't 1 to 1
In your channel all videos are good
Fentastic animation
THANK YOU VERY MUCH!
i feel much better having understood this
Great video!!! Congratulations, It now I can understand how a universal joint works
Thanks that was well explained. Good work.
Very clear and interesting
Think about a 10 tons truck fully loaded climbing a hill. All that mighty power goes thru that little metal cross. Tons of torque trying to bend that little piece. Amazing.
Wonderful! Thank you from Texas!
Why am i watching this at 2 am
Either way, that was some good narration and good explanation, thank you
Thanks RUclips for allowing me to nerd out when I least expect it.
I clearly understand about universal joint. Thank you
They didn't mention the fact that you need a spline shaft for these things to work. As it goes around it also moves in and out a tiny bit and slides on the spline.
I love that this is recommended to me
very well explained
Amazing animation with lovely explanation :)
Thanks for this video love from India
Thank you for these videos. I, along with many other instructors have been tasked with converting what are normally lab activities to online lessons in a very short period of time. I certainly appreciate your site as a resource of accurate, clearly explained information.
excellent explanation...thank you very much.......
I have always wondered how that works... omg thank you
This explains why a double cardan joint is used in some mechanical applications. 🔧
Thank you . I love mechanism
Still bends my mind
output speed is different?! mind blown, so that's why pinion angles on cars is so important!
excellent explanation!!!
Makes sense. I've always wondered why my jointed socket tools make a fluctuating whirring sound when taking a nut off at a extreme angle.
Ur explanation is suprb
In one word : Great!
With a double universal joint it is very important that:
1. the yokes of the middle piece need to be in one plane
2. the angle of the first joint must be the same as in the second joint. This give you the form of either a Z (as shown in this video) or a W (of some sort)
also: the middle piece still travels with fluctuating speed thus fluctuating accelerations thus fluctuating torque by inertia. So you want to have the middle piece as light and compact as possible to reduce inertia.
Great lesson
I've got some Qs if anyone can help:
1) Why are UJ still used today?
2) Are UJ typiclly used for RWD cars whereas CV joints are normally for FWD cars?
3) Why is the driveshaft angled as opposed to being straight? Is it due to the placement of the engine and rear passenger space considerations?
Thanks guys!
u joints are cheap... like $15 gets you a brand new one. cv joints... 10x that cost easily.
I don't think I needed this full video explanation to know how the universal joint works. Was clear from thumbnail itself.
How does the thumbnail explain the fluctuating output to you ? 😒🙄
So is it correct that, in a double universal joint, if the last rod (or whatever you call it) is not in line with the first rod, this will have a fluctuating output?
yes the angles must be the same.
Zach A Thank you.
but why will it have fluctuating output due to angles? its not like there is a output power loss from hitting angled rod, creating pressure in wrong angle,the cross does the work of automatically transfering same amount of rotation cuz itz stiff cross
VontekSRB yes due to angles which causes cyclic variation in speed
I don't know why, but I clapped after finishing this video. Hahaha. Great videos, man.
Oh that's why there will be two U joints connecting propeller shaft from engine to rear axle for constant speed