it has easy solution universal joint can remove it. our if both gears does increase and decreasing it does not need to move meant. like this one ruclips.net/video/S_PgvARTXDQ/видео.html -mounted Bevel gear on the drive shaft can remove this problem too to. and for synchronizing the belt whit out teeth doesn't need to it . our if small gear be able terne around itself a little bit (10 degrees) whit carve and small bumpy shape teeth become solved the problems. and for arms bending problem. It has tow solution whit antenna piston we can attach idlers center point to the mine shaft it doses limit it of the maximum increasing. But batter solution is vertical beam attached next to the arms they can slide between beam gap exactly. ruclips.net/video/oGHE3QL9ABo/видео.html
Making sure the toothed belt meshes with the variable rollers might be problematic. I did a design like this in 2004 and I dropped it because I couldn't solve that issue..
Indistinguishable jibberish fool! There are 12 moving parts I see, not counting bearings in all those gears, and if one fails it will take out the rest. The fact that it has a belt is another problem, have you ever dealt with a belt running multiple pulleys or gears?
The arms with no contact would extend with the remaining oil pressure and the arms with contact would retract. Unless you put a solenoid valve on eache of the arms. Centrifugal forces would cause cavitation in your hydraulic fluid at higher rpms. I like the core idea though.
you could conceivably build a special dampening valve into the carrier pistons that takes a split second to open; enough time for the inside arm to make a quarter revolution and contact the slack side of the belt
The number one problem I see right off is, the driven pulley consisting of six little cogs is not round. You have a hexagon shaped pulley with rounded corners but overall it is not round. Vibration would be tremendous. I think the animation is great however. Nice job!
Not a problem if the six little cogs are distributed symmetrically. Any force caused by accelerating the belt in one direction will be offset by accelerating the belt in the other direction on the opposite cog.
@@jackroutledge352 the problem I see is the 6 little cogs don't have anyway of locking, how do you get power transfer with the cogs spinning inside the belt loop? Next if watch the picture show you should note that the belt is traveling faster than rotation of "coged wheel" so was the cog spin omitted? Or is the belt being chew up. I guess this might work if you are looking for a system that transfer 1% to 2% of your power output and is easy to stall, in which case and under filled torque converter or a burner out pressure clutch (with or without grease) would do the same.
Sorry but I disagree. The distance between the top portion of the belt and the bottom portion would be expanding and contracting six times per revolution. That is not depicted in the animation. The video shows the belt going around in a circular motion, but the pulley is not round. A belt going around any shape, but a “round” pulley will vibrate & chatter like crazy.
The input shaft and output shaft are constantly moving to and from each other as the planetary side expands and contracts. This means another gear set or cv joint is needed to give a fixed input/output.
Put one on an arm chain driven to the pivot point of the arm. Like the swingarm of a motorbike can move toward/away from the seat.. or the multi step belt on an old lathe works with the motor suspended on an arm.
@@MrEricErwin Motorbike swingarms don't actually fail all that much... Not as efficient as what... something that doesn't actually function as designed until it has some form of extra modification to prevent torque from collapsing the unit. Anyways... Were trying to help with solving some logistics... helpful suggestions would be a plus. We're looking for some way to get the output from a moving point in space, to a fixed point (Like a CV or swingarm does)..
3 years late but... I think I see where u are going... and came up with this myself... forget a sprocket (As fixed, the back teeth never come in contact with the belt)... but an arc of teeth, fixed but with rubber mounting or similar allowing up to 1 pitch movement, so as the rams extend, and the ends move apart, they can bend a little toward the last arm, and reset as they pass into the gap.
The tension on the tapered wheel hub will pressure one side of the star drive and lose the center by pulling on one direction, elliptical center, or center will have off center axis as hub wheel expands
Actually that wouldn't be a problem if we could have the pistons fully travelling on each rotation... but I feel friction in the hydraulics would quickly heat the oil. So yes I think without independent supply pistons, the arms would do just as you say... But lets think about that.. With full oil, all arms would be at full extension. Mid oil where the ones not in contact would be at full but the ones on the belt would be shorter, but depending on how much oil in the system, anything between shor and long as the free arms would stop at full... to no oil, where all would be short... ooo that makes my brain hurt too...
The reason friction belt cvt's need improvement is their horrible efficiency, turning up to 25% of the input power into heat. The design in the video isnt a great solution, but it doesnt seem more complex than centrifugal rollers and a variator pulley.
Each of the small gears needs to be mounted on a worm gear that automatically rotates the small gear slightly to keep the teeth of the gear lined up with the cogs on the belt. As the arms extend, the worm gear will rotate the teeth on small gears, that way the belt doesn't skip.
sam- Your solution won't work because there are some diameters (meaning most) of the variable cog for which no set of fixed positions of the small cogs will work.
Your question is a logical fallacy known as "appeal to accomplishment". en.wikipedia.org/wiki/Appeal_to_accomplishment But... I have seen the inside of a transmission, and I have a video on my RUclips channel to prove it. ruclips.net/video/qL4ZhDlZAF4/видео.html
It is true... ;-( we dome it only on low speed like water well ... problem is toooo difference in shape .. it is like driving on quadrature well bicycle... and all is increasing with speed... and self freq res. ;-(( but you can do it smoething similar with magnets and it is working PERFECT..... just aluminium ring (filled circle) and another well 90degree. - and you are using the same principal of breaking.. but for forsing the weel... when you move maganet strait you change ratio.... nothing is toothing... we reacive 98% forse transformation..and 1% of tolerance. so it can be 99 ar 97 ;-)
This, note the upper right corner of the belt in animation stays the same curve even without any support, in reality the two straight sections would be flapping up and down 6 times per revolution.
@@michaelangelo8001 i see your point. adding some friction to the whole thing doesn't seem hard to remove the vibrations, like a clutch or some springs like in a regular clutch.
Genius... I noticed that a lot of viewers didn't get it. However, you will need a mechanical method of keeping the pulley teeth in sync with the belt teeth as the pulleys extend and contract.
@@jasper1555 Of course. The belt will stretch around the gaps in the wheel, forming a hexagonal shape. A hexagon is wider like this ⬣ (horizontal) than like this ⬢ (vertical). Therefore, as the hexagon rotates, it alternates between the two widths, which is basically like shifting up and down every 30 degrees. This video demonstrates the concept pretty well: ruclips.net/video/LJuCeAod8xc/видео.html
Interesting to read comments from people smarter than me, and although i hate vehicles with CVTs, this demonstration, shows me how well it would work with a high horsepower output Windmill I've designed and aspire to build, before i bite the big one. Nice illustrations!!
This is just a complex and heavy version of something every scooter has already. Also the different axle distance with different gearings seems unpractical.
@@omnianti0 Friction is used in a scooter CVT only to prevent the belt from slipping. When the scooter CVT is done right, there is very little slippage. A centrifugal clutch on the driven shaft uses friction only for clutch engagement and stays engaged through all movement of the CVT. The angle of taper in both the pulleys and belt are determined so that no part of the belt (high side or low side) needs to travel faster or slower than the part of the pulley it is in contact with no matter what the current reduction ratio is. This means that even though the friction between the belt and pulleys is very high, there is very little energy loss because the slippage is almost non-existent. This is the same as tire-to-road friction. It's very high but as long as slippage is low, the car rolls easily. The contraption in this video has a much more narrow range of ratios than a scooter CVT and there is no way it is as smooth or capable of the same high speeds. Furthermore, it would be a lot more expensive. It might be capable of more pulling force but for similar money you can get much more versatility from a hydrostatic arrangement. I wonder if this thing has a practical use.
If you need a new variable speed pulley or sheaves, Speed Selector makes pulleys that replace the Reeves, Hi-Lo, TB Woods and Lovejoy pulleys that went out of business or got bought. Most are in stock or Speed Selector will custom make if needed. They have an actual engineering department; very helpful.
That is outstanding, the principle is so simple, a hydraulic drive version instead of a belt or chain would be better in my opinion, using tubular tesla valves to control the flow of the hydraulic flow through the circuit and into a reserve tank at variable pressures...
What problem is this attempting to solve? It's a very complex solution for a problem that has already been fixed although it's theoretically interesting. Can't see it being used for anything with a high load though because the pistons on the red wheel would transmit their force perpendicular to their motion so the piston would quickly fail.
I like this concept, and I think it is spot on. Let me give you input and allow your idea to explode. Consider hydraulics, release valves, and pressure valves. When pressure is applied, the pistons expand, thus reducing the ratio. When the pressure is released, and/or transferred, the ratio increases. Thus, a fully functioning gear ratio adjusted by hydraulic pressure. You have a great idea.
better still just get rid of them all and fit a swashplate hydraulic pump to the engine and a swashplate hydraulic motor to the output shaft than all you need is a lever to control the position of the swashplates with this system you do not even need a gear system to get reverse you just move the swashplate to a negative position also if you have the swashplate straight you get a stationary position this way you can have infinite ratios.
Vites büyültüp küçültürken (debreyaja basılmış gibi) küçük dişliler serbest olmalı . İstenilen devir yakalndığında küçük dişliler sabitlenmeli. Yoksa diş atlaması yapar tat tak diye. Small gears should be free when the gear is enlarged or reduced (as the clutch pressed). Small gears must be fixed when the desired speed is reached. Otherwise, he's jumping teeth.
hell.... buick had a trans with 1 gear..... and it just slipped the shit out of the torque converter.... actually had two "gear positions"..... low and drive all low did was change the vane angles in the TC
It's funny, I remember how at the GM training center, they mentioned this technology existed forever. In the late 1800's if I'm not mistaken, the newspaper printing press was the first machine to use it. As far as the slush box 2 speeds went, some had a variable pitch stator, and others had some other weird setup. I remember seeing a video on it awhile ago, where it had three different turbines in the torque converter.
@@manueljonathancaceres1265 Actually, from experience and application of common sense, it is clear that this design is impractical for any real-world purposes.
@@abdulbasitahmed191 A lot of people said the same about the train at the beggining. We don't know if something work or not, until we test a prototype in reality.
Current CVT's are not perfect. There is room for improvement there. I think you are doing a good job of thinking out of the box. Sure, there are problems with this particular design as it is, but I really like what you have done here. Don't be discouraged! Keep up the good work and if you nail it, don't post it until it is secured with a patent.
The only solution to continues variable trans is no transmission at all. Just use a good electric motor with proper speed and torque control instead...
No desenho técnico a ilustração aparentemente funciona, mas na pratica esse conjunto de polias em série, gera desgaste prematuro da correia, uma vez que o passe da correia será forçada no passe das polias que estão em série...
Input and output shaft are not a constant distance apart. This adds complexity to the transmission of power resulting in inefficiency. Cool idea tho and might have a use in certain low rpm applications.
If i'm understanding this correctly, the animation needs more work to synchronize the speeds of the belt and sprockets..but the concept is excellent and actually appears to address the inherent high friction and its resulting unreliability attributed to the conventional dual cone cvt design. I would use grooved disks to enclose the spur gear setup for added stability and strength. (The grooves are for the ram extenders on the spurs) No doubt you're posting this here for p.o.c. purposes. Job well done and congratulations. Forget the definite A+ on your project, you've got serious potential for royalties.
@@barrywhitley2535 automatic transmissions have many parts but all of them are secured in a surefire way with static supports. it has many parts but nowhere does it have the output/input gear operated by 8 hydraulic arms. i dont even want to know what problems can be caused when one of them even slightly deviates at high RPM, since 6 of these hydraulic arms will be under the tense effects of high RPM.
The solution to this transmission is a coil like gear instead of those little gears, the coil is tensioned and unfurles as the tension decreases adding more surface for the coil, the coil is also the drive gear
Nice job! Sorry, but this setup is mechanically unrealistic. This system proposes that the axis of the shaft carrying the 6 synchronous idlers has to always move once the CVT action commences.
It may be unrealistic for some application you have in mind. Not every application requires the axes to be fixed. That could be achieved with a longer belt and a tensioner anyway.
Also - the DRIVE axis must move? It's really too many parts (to wear out and break) and then make slides for the motor to go back and fourth to change reduction.
What's your issue with the axis having to always move? And who said it does have to? I'm not sure I've ever read a comment by someone who is so sure of their own 'expertise' only to show they have no insite or innovative streak.
One obvious issue - low gear ratio change. The other would be - it looks fragile and iam not sure how do you gonna sichchronize "teeth" - more over, the belt will jump on the rollers.
I must be looking at this thing as being way too simple!!!. There is a belt with FIXED teeth, they never change. the length of the belt never changes, only the shape of the belt changes. When the idler arms push out to change the diameter of the driver shaft the tooth engagement does not change, so there is no need for worm gears or any thing else more complicated in this system. The dia. of one end gets bigger and the other end stays the same. All you have to do is slide the motor, which is easy, and keep the drive shaft fixed, and it should work. I think the designer goofed up when he said the idlers are fixed. I don't think he meant that they do not rotate.
It won't work, it will break the belt immediately. Why? 1.Stop the motor 2. Extend the telescopic 'things' - the small wheels are fixed to their shafts, right?
Не проживет этот механизм. Как инженер говорю. Две проблемы СЕРЬЕЗНЫЕ: ударная нагрузка на ось масляного поршня, причем не вертикальная, а в сторону. По просту говоря его согнет; и вторая - не возможность соблюсти аппаратно синхроность подведения скорости зубьев к ремню, будучи в разомкнутом состоянии. Мертвая технология.
Думаю что проживет но не долго, такую штуку нужно видеть в деле... Диапазон скоростей мал, разве что ставить два такие гидро-механизма на первом и втором вале, этим самым можно увеличить диапазон скоростей и избавится вот тех двух раздвижных поршней... Ище думаю что будет сильный шум, и относительно низкий КПД
Поэтому Вы инженер, а не инженер-конструктор. Это же кинематическая схема которую можно и нужно дорабатывать (диски с радиальными пазами, лабиринтные направляющие пазы и т.д.) в конце концов нужно поощрять любые идеи. Я не говорю что данная схема имеет потенциал и изображена правильно, но тем не менее- любой механизм в воздухе или на картинке безо всяких систем, фиксаторов, датчиков работать не будет. Выкиньте из своей машины все-оставьте кузов и коленчатый вал "парящий в воздухе" и наслаждайтесь поездкой товарищ инженер.
All clutch or belt transmissions can slip. Instead of saying what is wrong with CVT's, why dont you give a better example? Prove that you are an engineer rather than telling us to "google it". My automatic transmission can slip in my truck, my manual transmission can slip in my car, my belt can slip in my ATV. Give a better example... PLEASE.
their low efficieny is due to high friction on the sides of the belt dude...just like old v belts...they rely on sidewall friction and this prevents free movement and resists rotation...
Hugo Barbedo belts with teeth do not rely on outside friction along the sides they rely on the teeth. belts with teeth and V belts operate on different principles
Wont work, if the 6 little wheels can rotate they will and the star wheel wont go round, if they cant rotate the little wheels will not be able to keep their teeth in sync with the belt teeth. Fail.
It does have a number of failure points, but the number of parts and failure points in an automatic transmission (especially now that some have 8 or more speeds) is very high.
Don't rotate the individual wheels or have the rotating ones connected with a double sided cog belt and tensioner. Plus I would slit the wheels in half and have 6 wheels on one side equally between the wheels on the other side to keep the belt closer to a round profile and have less pulsations.
Nega much? The center distance changes when the diameter of the star wheel changes. These changes can be sync such that the chain remains in mesh all the time.
The cogs have to align properly or it will shred. There is already a V-belt version as well a a V-belt version that is made of steel in production vehicles. If there is a reliable prototype I would like to see it as this would likely vibrate immensely.
It looks smart I hope it also works smart because it either requires hydrolic pressure (and thus a perfect leak free sealants) or very strong springs inside the 6 wheels hydraulic mechanisms. In both cases there is option for lots of mechanical failures due to frequent usage. I dont know if it is an real existing thing or that this is just a theoretical drawing not yet in production. I wonder how flawless it runs in reality.
Excellent mechanism It always amazes me how all the critics come out of the woodwork to critique ideas they didn't have themselves All of them instant experts though most are completely wrong Like the guy saying the teeth wouldn't line up as the radial size increased Yes they would line up All little gears are independent idolers that are expanding at the same original angle And there would not be cavitation vibration as the it steadily moved closer to the drive where provided that the retention pressure remained consistent and adequate This would be an outstanding simple and very smooth variable transmission Great job
impressive enough graphics, but in use any load applied will be subject to minor inconsistencies (radial oscillations) in rotational speed as the cog belt is not engaged on a smooth continuous radius at the variable end of the drive. Roller chains present a "rumble" as they pass over sprockets in a similar manner.
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it has easy solution universal joint can remove it. our if both gears does increase and decreasing it does not need to move meant. like this one ruclips.net/video/S_PgvARTXDQ/видео.html
-mounted Bevel gear on the drive shaft can remove this problem too to.
and for synchronizing the belt whit out teeth doesn't need to it . our if small gear be able terne around itself a little bit (10 degrees) whit carve and small bumpy shape teeth
become solved the problems.
and for arms bending problem. It has tow solution whit antenna piston we can attach idlers center point to the mine shaft it doses limit it of the maximum increasing. But batter solution is vertical beam attached next to the arms they can slide between beam gap exactly.
ruclips.net/video/oGHE3QL9ABo/видео.html
I feel like this well be good for electric cars
diar saleh
Not likely. Are you forgetting that EVs don't need transmissions at all?
junk
Making sure the toothed belt meshes with the variable rollers might be problematic. I did a design like this in 2004 and I dropped it because I couldn't solve that issue..
Indistinguishable jibberish fool! There are 12 moving parts I see, not counting bearings in all those gears, and if one fails it will take out the rest. The fact that it has a belt is another problem, have you ever dealt with a belt running multiple pulleys or gears?
Great visualization of not working transmission.
I agree. This transmission won't work well.
Why? Couldn't see the problem
The teeth are primary problem.
exactly
@@aayushchalekar8260 The size of the teeth, you mean?
The arms with no contact would extend with the remaining oil pressure and the arms with contact would retract. Unless you put a solenoid valve on eache of the arms. Centrifugal forces would cause cavitation in your hydraulic fluid at higher rpms.
I like the core idea though.
I believe you, but I like real world testing too.
When a real engineer meets designer...
you could conceivably build a special dampening valve into the carrier pistons that takes a split second to open; enough time for the inside arm to make a quarter revolution and contact the slack side of the belt
The number one problem I see right off is, the driven pulley consisting of six little cogs is not round. You have a hexagon shaped pulley with rounded corners but overall it is not round. Vibration would be tremendous. I think the animation is great however. Nice job!
You don't see good
Not a problem if the six little cogs are distributed symmetrically. Any force caused by accelerating the belt in one direction will be offset by accelerating the belt in the other direction on the opposite cog.
Il problema n°2 è la distanza tra gli assi che varia in base alle dimensioni della ruota condotta...
@@jackroutledge352 the problem I see is the 6 little cogs don't have anyway of locking, how do you get power transfer with the cogs spinning inside the belt loop?
Next if watch the picture show you should note that the belt is traveling faster than rotation of "coged wheel" so was the cog spin omitted? Or is the belt being chew up.
I guess this might work if you are looking for a system that transfer 1% to 2% of your power output and is easy to stall, in which case and under filled torque converter or a burner out pressure clutch (with or without grease) would do the same.
Sorry but I disagree. The distance between the top portion of the belt and the bottom portion would be expanding and contracting six times per revolution. That is not depicted in the animation. The video shows the belt going around in a circular motion, but the pulley is not round. A belt going around any shape, but a “round” pulley will vibrate & chatter like crazy.
someone missed a few classes in Mech 101.
The input shaft and output shaft are constantly moving to and from each other as the planetary side expands and contracts. This means another gear set or cv joint is needed to give a fixed input/output.
Put one on an arm chain driven to the pivot point of the arm. Like the swingarm of a motorbike can move toward/away from the seat.. or the multi step belt on an old lathe works with the motor suspended on an arm.
@@TheButlerNZ Thats another point of failure. Not to mention not as efficient.
@@MrEricErwin Motorbike swingarms don't actually fail all that much...
Not as efficient as what... something that doesn't actually function as designed until it has some form of extra modification to prevent torque from collapsing the unit.
Anyways... Were trying to help with solving some logistics... helpful suggestions would be a plus. We're looking for some way to get the output from a moving point in space, to a fixed point (Like a CV or swingarm does)..
Надежность системы стремиться к нулю, а цена будет как у самолета.
Hidraulika! Odlicno resenje.Hvala za ideju.
I thought of this for my bike when I was 9yrs old in 1965 but I did not think about having the gears on moving centres ;-)
Чем сложнее конструкция, тем больше она ламучая.
This is perfectly possible. A great practical idea. Enough angular play is necessary for idle rigid sprokets, but it is not shown in the animation.
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Luke 2:14 NIV
3 years late but... I think I see where u are going... and came up with this myself... forget a sprocket (As fixed, the back teeth never come in contact with the belt)... but an arc of teeth, fixed but with rubber mounting or similar allowing up to 1 pitch movement, so as the rams extend, and the ends move apart, they can bend a little toward the last arm, and reset as they pass into the gap.
Incredible, Thank you for your share.
No sé quién se le ocurre estas cosas fantásticas. Muy bueno
The tension on the tapered wheel hub will pressure one side of the star drive and lose the center by pulling on one direction, elliptical center, or center will have off center axis as hub wheel expands
Actually that wouldn't be a problem if we could have the pistons fully travelling on each rotation... but I feel friction in the hydraulics would quickly heat the oil.
So yes I think without independent supply pistons, the arms would do just as you say...
But lets think about that..
With full oil, all arms would be at full extension.
Mid oil where the ones not in contact would be at full but the ones on the belt would be shorter, but depending on how much oil in the system, anything between shor and long as the free arms would stop at full...
to no oil, where all would be short...
ooo that makes my brain hurt too...
distance between in/out axles changes along with ratio, so it may be inacceptible in real applications
Very good demonstration.
This is the best way to complicate a simple design
The reason friction belt cvt's need improvement is their horrible efficiency, turning up to 25% of the input power into heat. The design in the video isnt a great solution, but it doesnt seem more complex than centrifugal rollers and a variator pulley.
Each of the small gears needs to be mounted on a worm gear that automatically rotates the small gear slightly to keep the teeth of the gear lined up with the cogs on the belt. As the arms extend, the worm gear will rotate the teeth on small gears, that way the belt doesn't skip.
how about making a toothed belt but with V shaped teeth and matching pulleys? that way it would adjust automatically and dont jump...
well i did not think well...the small gears must be fixed or else power wont be transmitted so my idea doesnt work also
sam- Your solution won't work because there are some diameters (meaning most) of the variable cog for which no set of fixed positions of the small cogs will work.
Have you seen the inside of a transmission?
Your question is a logical fallacy known as "appeal to accomplishment". en.wikipedia.org/wiki/Appeal_to_accomplishment
But... I have seen the inside of a transmission, and I have a video on my RUclips channel to prove it.
ruclips.net/video/qL4ZhDlZAF4/видео.html
The DAF variomatic solution is simpler and works perfectly.
Very clever design !
Looks like it will work just fine.
Obrigado pela ideia. Vou fabricar uma bicicleta com esse cambio.
We already tried tried this setup 2 years ago. It doesn't work properly on high speeds as the belt tends to vibrate extensively.
It is true... ;-(
we dome it only on low speed like water well ...
problem is toooo difference in shape ..
it is like driving on quadrature well bicycle...
and all is increasing with speed... and self freq res. ;-((
but you can do it smoething similar with magnets and it is working PERFECT.....
just aluminium ring (filled circle) and another well 90degree. - and you are using the same principal of breaking.. but for forsing the weel... when you move maganet strait you change ratio.... nothing is toothing... we reacive 98% forse transformation..and 1% of tolerance. so it can be 99 ar 97 ;-)
This, note the upper right corner of the belt in animation stays the same curve even without any support, in reality the two straight sections would be flapping up and down 6 times per revolution.
why is it different than conventional CVT. You've got a belt there too?
@@Channel-tr1hx Positive drive VS friction drive.
@@michaelangelo8001 i see your point. adding some friction to the whole thing doesn't seem hard to remove the vibrations, like a clutch or some springs like in a regular clutch.
Genial muy versátil Saludos desde CHIHUAHUA MÉXICO!.
Improvements are always possible. Here you have the prototype. Brilliant!
ruclips.net/video/KF3G_VJYiCg/видео.html
Genius... I noticed that a lot of viewers didn't get it.
However, you will need a mechanical method of keeping the pulley teeth in sync with the belt teeth as the pulleys extend and contract.
I'm sure someone must have mentioned this already, but that's going to produce oscillating output speed
can you explain why it would?
@@jasper1555 Of course. The belt will stretch around the gaps in the wheel, forming a hexagonal shape. A hexagon is wider like this ⬣ (horizontal) than like this ⬢ (vertical). Therefore, as the hexagon rotates, it alternates between the two widths, which is basically like shifting up and down every 30 degrees. This video demonstrates the concept pretty well: ruclips.net/video/LJuCeAod8xc/видео.html
So smooth motion ..
🤗
Interesting to read comments from people smarter than me, and although i hate vehicles with CVTs, this demonstration, shows me how well it would work with a high horsepower output Windmill I've designed and aspire to build, before i bite the big one. Nice illustrations!!
ruclips.net/video/KF3G_VJYiCg/видео.html
How do you ensure the teeth in the belt line up as you "change gears". Also tooth count gives this design a finite number of ratios
This is just a complex and heavy version of something every scooter has already. Also the different axle distance with different gearings seems unpractical.
no the scooter use frictions
@@omnianti0 Friction is used in a scooter CVT only to prevent the belt from slipping. When the scooter CVT is done right, there is very little slippage. A centrifugal clutch on the driven shaft uses friction only for clutch engagement and stays engaged through all movement of the CVT. The angle of taper in both the pulleys and belt are determined so that no part of the belt (high side or low side) needs to travel faster or slower than the part of the pulley it is in contact with no matter what the current reduction ratio is. This means that even though the friction between the belt and pulleys is very high, there is very little energy loss because the slippage is almost non-existent. This is the same as tire-to-road friction. It's very high but as long as slippage is low, the car rolls easily.
The contraption in this video has a much more narrow range of ratios than a scooter CVT and there is no way it is as smooth or capable of the same high speeds. Furthermore, it would be a lot more expensive. It might be capable of more pulling force but for similar money you can get much more versatility from a hydrostatic arrangement.
I wonder if this thing has a practical use.
@@lenmarinaccio3262 i guess the scooter system have temperature and speed limitation more restricted than this system
It will be more efficient than a Vee belt but probably has less gear range.
If you need a new variable speed pulley or sheaves, Speed Selector makes pulleys that replace the Reeves, Hi-Lo, TB Woods and Lovejoy pulleys that went out of business or got bought. Most are in stock or Speed Selector will custom make if needed. They have an actual engineering department; very helpful.
That is outstanding, the principle is so simple, a hydraulic drive version instead of a belt or chain would be better in my opinion, using tubular tesla valves to control the flow of the hydraulic flow through the circuit and into a reserve tank at variable pressures...
0:21 ... just pulling some teeth from the rubber belt, it moves faster than the gears ...
200% efficiency
It's a frictionless system..
the animation is meant to show the principle, clearly the animator didn't adapt the speed of the rubber.
Lmao
What problem is this attempting to solve? It's a very complex solution for a problem that has already been fixed although it's theoretically interesting. Can't see it being used for anything with a high load though because the pistons on the red wheel would transmit their force perpendicular to their motion so the piston would quickly fail.
what fixed this problem? source?
I like this concept, and I think it is spot on. Let me give you input and allow your idea to explode. Consider hydraulics, release valves, and pressure valves. When pressure is applied, the pistons expand, thus reducing the ratio. When the pressure is released, and/or transferred, the ratio increases. Thus, a fully functioning gear ratio adjusted by hydraulic pressure. You have a great idea.
better still just get rid of them all and fit a swashplate hydraulic pump to the engine and a swashplate hydraulic motor to the output shaft than all you need is a lever to control the position of the swashplates with this system you do not even need a gear system to get reverse you just move the swashplate to a negative position also if you have the swashplate straight you get a stationary position this way you can have infinite ratios.
How is this not the funniest thing ever? It's basically a CVT/Planetary transmission hybrid.
Зубья не всегда будут попадать в ремень!!!
Это применимо скорее для поликлинного ремня и он (ремень) будет очень страдать при этом))
При большой нагрузке вся эта конструкция развалится...
слишком много трущихся деталей. не очень надёжно
It can work at least for low power applications but it can be expensive to build. Also the ratio is small,
Vites büyültüp küçültürken (debreyaja basılmış gibi) küçük dişliler serbest olmalı . İstenilen devir yakalndığında küçük dişliler sabitlenmeli. Yoksa diş atlaması yapar tat tak diye.
Small gears should be free when the gear is enlarged or reduced (as the clutch pressed). Small gears must be fixed when the desired speed is reached. Otherwise, he's jumping teeth.
idea works only on PC. all see in first second that belt don´t go on teeth correctly
Belt length changes as well
@@privitpilot101 eh, if you could manage an expansion ratio on the right side you could keep a constant belt length
What for teeth? Without better! :)
Daf built a variomatic already in the 60's
hell.... buick had a trans with 1 gear..... and it just slipped the shit out of the torque converter....
actually had two "gear positions"..... low and drive
all low did was change the vane angles in the TC
It's funny, I remember how at the GM training center, they mentioned this technology existed forever. In the late 1800's if I'm not mistaken, the newspaper printing press was the first machine to use it. As far as the slush box 2 speeds went, some had a variable pitch stator, and others had some other weird setup. I remember seeing a video on it awhile ago, where it had three different turbines in the torque converter.
saw this done (in a diagram in some magazine) decades ago using a chain and sprockets
Оригинально!👍
looks like an "A" school project... but a dismissed engineering possibility/real world application value.
We must to try. You'll never know if that idea will work on the real world until you probe it...
@@manueljonathancaceres1265 Actually, from experience and application of common sense, it is clear that this design is impractical for any real-world purposes.
@@abdulbasitahmed191 A lot of people said the same about the train at the beggining. We don't know if something work or not, until we test a prototype in reality.
@@manueljonathancaceres1265 somethings you can tell by looking at whether they have any real world practical value.
It has potential. It can be made to be much thinner than a standard CVT with a V-belt. Suitable for bicycles, perhaps?
очень большая ударная нагрузка на ремень!
Great 💡 idea👍
Es el mejor variador de velocidad que ví hasta hoy, congratulations
Question: how do you sincronize the rotation of the small pulleys when they are not in contact with the belt?
sincronizing is for noobs !
Glue, they don't move...
the small pulleys are linked to the central axe, so they all move together even when they don't touch the band.
@@En_theo worse than i thought...
@@unbekannternr.1353
Opinions are not arguments, maybe more neutral comments on why you think that ?
Current CVT's are not perfect. There is room for improvement there. I think you are doing a good job of thinking out of the box. Sure, there are problems with this particular design as it is, but I really like what you have done here. Don't be discouraged! Keep up the good work and if you nail it, don't post it until it is secured with a patent.
You want to improve it taken off the market the biggest piece of s*** they built in the last 50 years
The functional version of this is belt drive with re-sizable drive pulley. They are found on 4 wheelers and snow mobiles as well as other applications
ruclips.net/video/KF3G_VJYiCg/видео.html
That's a very good idea.
The only solution to continues variable trans is no transmission at all. Just use a good electric motor with proper speed and torque control instead...
No desenho técnico a ilustração aparentemente funciona, mas na pratica esse conjunto de polias em série, gera desgaste prematuro da correia, uma vez que o passe da correia será forçada no passe das polias que estão em série...
Input and output shaft are not a constant distance apart. This adds complexity to the transmission of power resulting in inefficiency. Cool idea tho and might have a use in certain low rpm applications.
Its magic!!!!
You should see the perpetual motion engine theyve modeled. It works awesome in the meta universe. Seriously.
If i'm understanding this correctly, the animation needs more work to synchronize the speeds of the belt and sprockets..but the concept is excellent and actually appears to address the inherent high friction and its resulting unreliability attributed to the conventional dual cone cvt design. I would use grooved disks to enclose the spur gear setup for added stability and strength. (The grooves are for the ram extenders on the spurs) No doubt you're posting this here for p.o.c. purposes. Job well done and congratulations. Forget the definite A+ on your project, you've got serious potential for royalties.
ChuddleBuggy Agree.The naysayers are out to lunch.
AKrahn, P Eng
Not perfect visualization, but like
This is quite an ingenious design.
ruclips.net/video/KF3G_VJYiCg/видео.html
I think it's a great idea, simple with few parts. The belt and amount of space could be the only problems.
simple with few parts? are you kidding me?
@@danielsteger8456 Have you seen the inside of an auto transmission? This is very simple in comparison.
@@barrywhitley2535 automatic transmissions have many parts but all of them are secured in a surefire way with static supports. it has many parts but nowhere does it have the output/input gear operated by 8 hydraulic arms. i dont even want to know what problems can be caused when one of them even slightly deviates at high RPM, since 6 of these hydraulic arms will be under the tense effects of high RPM.
Bad design, multiple points of failure, might work in theory but to implement in practice, that's a totally different matter...
But it won't slip like a conventional cvt
the common variabel transmission like on yamaha Tmax allready do well so why make it more complicated and heavier :D
Because there has yet to be a cvt that reliably holds more than about 200 hp
The solution to this transmission is a coil like gear instead of those little gears, the coil is tensioned and unfurles as the tension decreases adding more surface for the coil, the coil is also the drive gear
Brillant! 🙂👏👏
ruclips.net/video/KF3G_VJYiCg/видео.html
show me a real working one.... driving something
How are ya gonna deal with belt tension ?
The pneumatic/hydraulic cylinders that hold each side apart holds tension, and a u-joint is used on the output or input to compensate for the movement
We use to do this with Cyclo-Indexed Cam drives over 40 years ago
Awesome!!! i like
I think you mean "continually variable transmission"
sorry. the small wheels spin idling the whole thing.
I don't think they are meant to be free to spin.
Гениально!
Great idea for bike.👏😂 👍😂 👌
Nice job!
Sorry, but this setup is mechanically unrealistic. This system proposes that the axis of the shaft carrying the 6 synchronous idlers has to always move once the CVT action commences.
.idlers make possible that we have to change ratio
Kaveh Mad
I know! what I am saying is that the central shaft carrying the idlers moves.
It may be unrealistic for some application you have in mind. Not every application requires the axes to be fixed. That could be achieved with a longer belt and a tensioner anyway.
Also - the DRIVE axis must move? It's really too many parts (to wear out and break) and then make slides for the motor to go back and fourth to change reduction.
What's your issue with the axis having to always move? And who said it does have to? I'm not sure I've ever read a comment by someone who is so sure of their own 'expertise' only to show they have no insite or innovative streak.
One obvious issue - low gear ratio change. The other would be - it looks fragile and iam not sure how do you gonna sichchronize "teeth" - more over, the belt will jump on the rollers.
The Zenith Gradua motorcycle system of 1911 had certain commonalities
I must be looking at this thing as being way too simple!!!. There is a belt with FIXED teeth, they never change. the length of the belt never changes, only the shape of the belt changes. When the idler arms push out to change the diameter of the driver shaft the tooth engagement does not change, so there is no need for worm gears or any thing else more complicated in this system. The dia. of one end gets bigger and the other end stays the same. All you have to do is slide the motor, which is easy, and keep the drive shaft fixed, and it should work. I think the designer goofed up when he said the idlers are fixed. I don't think he meant that they do not rotate.
И не какой сраной коробки,молодцы,сразу понял,за счёт давления.
John deeres posi-torq drive systems on combines works something like this.
It won't work, it will break the belt immediately. Why?
1.Stop the motor
2. Extend the telescopic 'things' - the small wheels are fixed to their shafts, right?
stopping the motor would just stop the output the same as any gearbox that was in gear with the motor stopped
Не проживет этот механизм. Как инженер говорю. Две проблемы СЕРЬЕЗНЫЕ: ударная нагрузка на ось масляного поршня, причем не вертикальная, а в сторону. По просту говоря его согнет; и вторая - не возможность соблюсти аппаратно синхроность подведения скорости зубьев к ремню, будучи в разомкнутом состоянии. Мертвая технология.
Думаю что проживет но не долго, такую штуку нужно видеть в деле... Диапазон скоростей мал, разве что ставить два такие гидро-механизма на первом и втором вале, этим самым можно увеличить диапазон скоростей и избавится вот тех двух раздвижных поршней... Ище думаю что будет сильный шум, и относительно низкий КПД
Абсолютно согласен.
Это же просто картинка, они деньги на картинках зарабатывают. Никто не собирается воплотить это в реальный механизм.
Вариатор это да
. 👌
А эта на видео еще и шумная
Поэтому Вы инженер, а не инженер-конструктор.
Это же кинематическая схема которую можно и нужно дорабатывать (диски с радиальными пазами, лабиринтные направляющие пазы и т.д.) в конце концов нужно поощрять любые идеи. Я не говорю что данная схема имеет потенциал и изображена правильно, но тем не менее- любой механизм в воздухе или на картинке безо всяких систем, фиксаторов, датчиков работать не будет. Выкиньте из своей машины все-оставьте кузов и коленчатый вал "парящий в воздухе" и наслаждайтесь поездкой товарищ инженер.
Similar transmissions were proposed in the 1960s.
Oh brilliant. Now if I ever decide I want to build a variable wheelbase motorcycle I’ll know what transmission to use.
ruclips.net/video/KF3G_VJYiCg/видео.html
This setup is overly complex and has too many moving parts. The 2 cones with a sliding belt design works perfectly well.
slippage
All clutch or belt transmissions can slip. Instead of saying what is wrong with CVT's, why dont you give a better example?
Prove that you are an engineer rather than telling us to "google it".
My automatic transmission can slip in my truck, my manual transmission can slip in my car, my belt can slip in my ATV.
Give a better example... PLEASE.
their low efficieny is due to high friction on the sides of the belt dude...just like old v belts...they rely on sidewall friction and this prevents free movement and resists rotation...
Hugo Barbedo belts with teeth do not rely on outside friction along the sides they rely on the teeth. belts with teeth and V belts operate on different principles
no Tristyn i am talking about common cvt like in scooters
Wont work, if the 6 little wheels can rotate they will and the star wheel wont go round, if they cant rotate the little wheels will not be able to keep their teeth in sync with the belt teeth. Fail.
If the little wheels had some kind of cam that kept them properly aligned, would that work?
@@pdgearhead3504 but would you want it to work? look at the parts number and possible failure points...it is a gloryfied variomatic...
It does have a number of failure points, but the number of parts and failure points in an automatic transmission (especially now that some have 8 or more speeds) is very high.
Don't rotate the individual wheels or have the rotating ones connected with a double sided cog belt and tensioner. Plus I would slit the wheels in half and have 6 wheels on one side equally between the wheels on the other side to keep the belt closer to a round profile and have less pulsations.
Nega much? The center distance changes when the diameter of the star wheel changes. These changes can be sync such that the chain remains in mesh all the time.
You could deploy this along with the "variable wheelbase" telescoping motorcycle frame... so it would work.
I think that the problem here, would be the control (and longevity) of the extending Rams.
I think cvt will be a failure
It already is
CVT is not New
Way too complicated, and full with failure possibilities.
@John Gault it is a variomatic...only more complex...this is nothing new only over engineered
@John Gault in know...it sadly was a waste of time modelling this...
ARE YOU
easily 1/10 moving parts of typical automatic transmission.
@Agent J What is the advantage of this over a variomatic?
The wolf is already born
The cogs have to align properly or it will shred. There is already a V-belt version as well a a V-belt version that is made of steel in production vehicles. If there is a reliable prototype I would like to see it as this would likely vibrate immensely.
learn manual
Or buy a double clutch.
maelgugi Can't tell if troll or moron
Learn to keep up with the times.
It looks smart I hope it also works smart because it either requires hydrolic pressure (and thus a perfect leak free sealants) or very strong springs inside the 6 wheels hydraulic mechanisms. In both cases there is option for lots of mechanical failures due to frequent usage.
I dont know if it is an real existing thing or that this is just a theoretical drawing not yet in production. I wonder how flawless it runs in reality.
I believe this is only an illustration. Poorly done too cause its not a good design. Actually CVTs are designed and work much differently.
Siren kiddies: *OmG A ThUnDeRbOlT BlOWE-*
Everyone: *shut*
How could someone spend hours to make such a useless thing
pretty sure the simple angled slides that move based on rpm is less complicated with fewer moving parts to break
Snowmobile clutch is hard to beat.
这个设计是不错，不过部件太多，可靠性和耐用度有待检验！
Great way to strip the belt clean
Excellent mechanism
It always amazes me how all the critics come out of the woodwork to critique ideas they didn't have themselves
All of them instant experts though most are completely wrong
Like the guy saying the teeth wouldn't line up as the radial size increased
Yes they would line up
All little gears are independent idolers that are expanding at the same original angle
And there would not be cavitation vibration as the it steadily moved closer to the drive where provided that the retention pressure remained consistent and adequate
This would be an outstanding simple and very smooth variable transmission
Great job
ruclips.net/video/KF3G_VJYiCg/видео.html
impressive enough graphics, but in use any load applied will be subject to minor inconsistencies (radial oscillations) in rotational speed as the cog belt is not engaged on a smooth continuous radius at the variable end of the drive.
Roller chains present a "rumble" as they pass over sprockets in a similar manner.
It already exists since 80's, in a simpliest mechanism setup. And it is used in older combines harvsters, linking the engine to the gearshift.
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