Bicycle chainless drive of roller gears
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- čas přidán 28. 07. 2018
- Being different from bevel gears:
• Hoe werkt een cardanas...
roller gears of ceramic ball bearings in this design help to reduce friction and increase efficiency.
Blue roller gear has prismatic joint with violet roller gear (sliding key).
Set of face gears (in yellow) for bicycle rear wheel allows getting large speed numbers.
Gear shifting device (placed in the bicycle chain stay) consists of screw-nut mechanism, blue step motor powered by brown battery. The orange nut has a pin that slides in circular groove of the blue roller gear hole.
There is an oneway overrunning clutch (freewheel) placed between the rear shaft and the yellow rear hub (not shown).
The video shows shifting proccess from highest speed to lowest one.
This video was made based on design of CeramicSpeed:
• Is Ceramicspeed Driven...
STEP files of this video:
www.mediafire.com/file/udx1mb7...
Inventor files of this video:
www.mediafire.com/file/tkaiy3b... - Věda a technologie
I have seen the actual bicycle prototype as well and apparently it’s very efficient in delivering power
Very Nice, Thanks for making the model.
Given that you cannot change gear at every position of the wheel (teeth do line up only at certain angles) how do you synchronize wheel angle with pinion shifting?
In this video the roller width is smaller than the distance between two adjacent tooth rims. In shifting process the rollers first leave
one tooth rim and then enter the next one. So no need to shift at position where the teeth are in line. There is the collision between the rollers and the tooth rims so the shift shoud be performed at slow speed.
The same concept can be found in car or motorcycle gearboxes of spur gears.
If ya can't find em, grind em
If you can find a way to shift the ratio without the electronics, do it mechanically only, then that would be a great accomplishment. If you do this, please make it opensource. The multi ratio gear (or whatever they are going to call it) will flex and bend away from the pinion under any kind of load, and that is another issue they must address. I thought of a solution to that about a week ago when I first seen a video on this. But there likely are many possible solutions.
I think the CTV is the best solution and transmitting depends on pinion ratio (angular speed) by that mechanism which forms of some metallic heavy balls obtain around a shaft when the speed get higher
the balls will be gripped away outwards and it grips another shaft that controls the width of rollers which carry the belt
I would like to know how many watts a normal good quality standard derailer shift system consumes. I bet it is real low. With that in mind, this chainless system is for all but the most advanced racer, absolutely a waste of money, likely many thousands of dollars USD. I also RETRACT my comment above where I mention "I thought of a solution" because I thought some more and found that it will not work on a spoked wheel.
BiddieTube an adjustment like what is used on an axial piston pump would work to shift it. I think it might be called a swash plate. I wonder if you could make it infinitely variable if you machine it out of a solid piece with the roller guides moving to the center in a linear fashion.
Отлично, вы молодец!
Thanks for the video
what would be the advantage in this? apart from chain coming out..
For its advantages see:
bikerumor.com/2018/07/08/wild-ceramicspeed-driven-13-speed-drivetrain-concept-shifts-with-no-derailleur/
There are only disadvantages
As I see it there is more cons than pros.
1. Most likely can't upgrade your old bike and if can it would be costly
2. The initial cost it self very high, you need to buy new bike
3. Most likely problem with length of the shaft as every bike maker make their bikes in slight different dimensions.
4. If one of disk gear teeth damage whole dish need to be replaced, as all gears are one piece disk, so you can't use damage gear and how would like jumping between gears through the damage one?
5. If there will be one standard? or many? as different companies like to implement their own idea in size, length amount of rollers.
6. When shaft somehow break in the middle of your trip what then? Chain you can easy fix with spear parts (if someone have their repair kit) here I can see a problem.
Chain it simple, easy to fix and common, weight is small and for the drag well, if you want travel in comfort, buy eclectic bike or go by car.
As to info from above URL
"to have less drag, less weight, and take up less space? That’s what CeramicSpeed has done with their new Driven drivetrain concept, relying on a pair of roller pinions on a carbon driveshaft" --- really?? Less space, how? As for what their picture shows the dimensions of the bike didn't change and if they are taking about the gears and shaft than this information is irrelevant.
The rest of text is standard "BS" using "99% better" advertisment.
If there are some major pross to this concept please write below.
1. not a con. more like.. when you buy a new one, then it could have this transmission
2. not a con. think frames for disk brakes.
3. length of bottom bracket to rear derailleur is pretty much the same on every bike, because it depends on the size of the rear wheel, which is the same size on every bike, not the frame size.
4. yeah maybe
5. same as with with shimano, sram, campagnolo shifters and disc brakes
6. really, what when your frame brakes in the middle of your trip? it's not a chain, it's pretty damn sturdy carbon fiber, or any other material.
I appreciate you referring to the ceramic speed video. I would have hated your channel if you claimed this as if it was your own unique idea.
how did u mesh the teeth in inventory can u please tell me
This video was made in Autodesk Inventor, Dynamic simulation.
3D Contact is used for the teeth.
Download Inventor files of the video to know more.
The link is in the video description.
Very nice
I'd like to see thang010146 concept of a chainless IVT (indefinitely variable transmission) for a bicycle
I have no concept so far.
The bearings would hit the bigger / smaller back gear when they desynchronize when shifting.
blise518B The design uses a computer controlled motor inside the drive tube that shifts it "Just Right and in time" so it does not clash and self destruct. Personally, I think that the system will be effected by dirt and other stuff that will interfere with the shifting resulting in smashed components.
Excelente!!!
please give the link of design calculations, dimensions and research paper of this mechanism
Sorry, I don't have them.
As for the dimensions please use CAD files of this video.
Links to download them are in the video description.
@@thang010146 any research paper?
No, I don't have.
that was awesome
Which software you use? Great job!!
It's Autodesk Inventor.
What is the shape or profile of gear tooth
Cycloid.
See:
czcams.com/video/xFAdG6zUtD4/video.html
wow... cool!
Is there ever a bike that operates on gear trains?
Please read the video description.
Awesome
I need this assembly urgently plz send me. I am making project ob this.
Please read the video description.
Links to dowload CAD files of the video are there.
@@thang010146 yes but its not moving
Learn how to make an object move in your software.
Amazing video! and thanks for uploading the files. I'm doing my enginerring dissertation based on this design but applied to aerospace engineering. Could yiu please private message me if you would like to know more? I would like to share the idea with you and see what you think about it:)
plse give me ur number
Buenas tardes, me gustaría poder acceder u sus planos para intentar realizar ese proyecto a nivel personal, soy ciclista y me gusta la tecnología. Agradezco su colaboración.
Use CAD files of this video to get drawings.
Their links are in the video description.
Shifting them gears ⚙️
I think I saw that someone made something like this that you can buy now
Yes:
www.youtube.com/watch?v=7gip7...
@@thang010146 send the link
H that link doesn't work
Este sistema ya está patentado y en proceso de fabricación.
Jajaja, este sistema nunca va a funcionar. Has visto un prototipo con cambio de marchas funcionando ?
Are there knockoffs or only CeramicSpeed makes such bicycles?
That transmission is gonna get jammed so easy.
How u rotate this??? Plz tell me
Learn a CAD software to know how.
@@thang010146 can i do this in solidwork?
I don't know SolidWorks.
@@thang010146 which software you use?
Autodesk Inventor.
как с вами связаться?
My email:
thang010146@gmail.com
Parece ser más débil que el de cadena. Como que se partirán los dientes fácilmente.
🚴
Цепь ухватывает звезду сразу за десяток зубцов, соответственно и усилие между ними распределяется. В данной конструкции передача момента идет только через один зуб, следовательно основными "болезнями" будут выломанные ролики, их ускоренный износ и проскальзывание по зубцам вследствие деформации звезд.
Yes. You are right when showing disadvantages of this drive.
А Европе такие велосипеды уже лет 10 на автоматической муниципальной оплате ! Ужаснее техн.позора вряд-ли ещё найти ! ...проскальзывают карданные передачи жутко ! Скрежет зубовный мощнейший и тд !
Ain't This The Ceramic Speed Design?
Yes. Please read the video description.
Ammazing Sir.. could you put the inventor files; i'm new in this software so i wanna practice it as much as possible. thanks
Link to download the Inventor files of this video has been added to the video description recently.
thang010146 thanks Sir
China replica will release next year
اخترای خوبی
I saw this an CZcams there is a real prototype
Lmao
ceramicspeed, If is a good construction, Shimano buy the Patent rights .
NESSUNO TI SPIEGA COME CAMBIARE RAPPORTO
1
This thing makes no sense in real life.
But nice idea though
Why not? Did you watch the video in the description of the actual real bike?
David Mattiasson - yes and it still makes no sense
TechTom why?
David Mattiasson all the force rests on one single tooth
TechTom good point but with a chain all force rest on one single link (like the expression "weakest link"
This system is invented by Hasan Kum a Turkish inventor and nobody honors him.
Please see czcams.com/video/FDvoNXPIfJ0/video.html for the Inventor (Mucit in Turkish) Hasan Kum's video
Please see:
czcams.com/video/W38bOovKApo/video.html
Those roller joints are weak points tho.
The cardan Drive is already 100 years old, pops up again and again, without success. The change of gears will never work. Any prototype available with gear change ??? 😂😂 No!
When you steal content from CeramicSpeed
Please read the video description.
This video is an advertisement for CeramicSpeed.