Thank you! One-way bearings was the first thing I thought when I saw your ratcheting CVT, so if you're going to do this, it would be absolutely awesome!
@@christophersmith8014 in the case of compliant mechanisms, leafsprings are used most of the time. 3D printers can print leafsprings fairly well. 3D printers are arguably the best tool for making compliant mechanisms.
Seems like this could really shine in RC cars or boats to allow for a sprag free rolling forward and underwater props to freespin when not under drive torque. Excellent mod with the double tapered rollers - a very smart adaptation. 👍 great stuff.
Fantastic design, love it. .. yes please! Swap out parts on a bike one by one and see how many parts you can replace/improve on with 3D printed versions!
@@leilaumfleet5022 I was thinking whether it would be possible to build an automatic three speed gearbox with three of these mounted coaxially with three different radii.
I was scrolling through the entire channel history trying to find the video about the mechanism that only rotates one way (after having seen the mechanism while scrolling through 507 movements), and I gave up and decided to just watch this video instead. Amazing video, and you had the link in it to exactly what I had been looking for originally!
You said you are not an engineer but you are certainly finding solutions like a very good one. Trial and error is the mother-process of engineering (before and many times still now). :-) Congrats and stay the route!
Just wondering if you tried printing this with more rollers. I would think that more rollers would mean more holding power since there would be more contact points when it "locked". Now I'm curious so I'll be modeling this and printing some different iterations to test my theory. This was quite an inspirational video, thank you :)
"I'm not an engineer" No, but how you took this project and applied it to a previous one with the intention of improving it most certainly is a good practice of engineering if I've ever seen one.
A company called Onyx actually makes sprag clutch hubs for mountain bike wheels! It's totally a worthwhile application for these mechanisms. They have the advantage of near-instantaneous engagement, and they're silent
Even if it broke, since he isn't using a machine, but his hands. The amount of force will not lead to enough force to make it penetrate his eyelid and into his eye. Not to mention, he looked away, which reduces the risk a little. The highest risk he has, is a piece getting into his Ear hole.
The shape you are referring to on the “cylinder” is called a hyperbaloid where it’s basically a cylinder that gets smaller as it reaches the middle and bigger as it goes back out.
@@emm5468 it's fine, your English is great, algebra wise, I could've made that mistake myself so it's fine. Nothing really wrong here, just correcting someone over the internet
This is very slick! I had a little flash of an idea to combine this with a thing I've been working on here and there - a sort of gatling gun style prop. Using a power drill or screwdriver to drive the whole thing, the printed barrel set kind of stops on a dime when the trigger is released, just because it doesn't weigh very much. I think using a roller clutch like this could give it some extra spindown time when the motor just stops, but still catch it firmly enough to spin up instantly when power is back on.
Make it out of wood and throw it on William Osmunds wooden, lazercut bike! /s Looks awesome, I'm surprised by how well it works and seems to handle torque.
So funny.. chatgpt and I were talking about this earlier today learning the differences in these one way clutches. Maybe a little late to the party but here I am
Gravity is only pulling a couple rollers into binding... that means that your device is only acting at about 15-20 % of its capacity. A good safety margin against catastrophic failure, but it also undermines just how good your design could be. Great jon
I can definitely see that slippage as an intentional 'torque limiter'. Pending some rather precise design details, it could work great to keep other parts from breaking in the event of over-torque or another system lock-up area.
Nice, I have some ideas on how to use this. A stepper motor, a micro and this mechanism and you can do many little things. The clutching mechanism should help prevent the breaking when a reverse force is applied to the motor shaft , or so I hope. Thanks for inspiring :)
If this one way clutch is not attached to your wheel hub but to the pedals, and you shift to a lower gear then you can put less stress onto your pedals (and one-way-clutch-thingy) while still delivering enough torque to get rolling. Do this sort of stuff to make it work, bake it in an oven, print 100% infill, etc... I know one thing: it will work if you do all of this and if you ride carefully, but i'm not sure how long it will hold up, and that's the interesting part.
Not really, you'd have to push faster and faster so that the acceleration imparted on the rollers are greater than their current rpm does, cause if not, it'll just "slip" because technically, the rollers are still rolling forward, only slower as you push. This will work at low speeds, but you might as well just walk and save the awkwardness
Borg warner Overdrives use a roller clutch that uses 1 spring to tension all 12 rollers, the spring pushed on a cage that made sure all 12 rollers bound up bat the smame time
the most common use for something like this is ratchet wrenches/screwdrivers. You want it to spin one way without activating, and you want it to no longer spin the other way when you are actually tightening or loosening the bolt/nut/screw
The balls arent functioning as the bearing in this situation, the balls are the locking mechanism. The outer ring is only held in place with the solid inner parts which would cause friction. It would be like if you made a car where the wheels lock against the ground in reverse but raise up going forward so that the car can only slide on the undercarriage one way but not the other. Not the original function or more efficient or even very useful.
Daniel McArthur yeah, I was hoping he wasn’t going to go the whole video calling this clutch a bearing. That would have been tough to sit through lmao. At least he admitted that he’s calling it the wrong thing.
Have you tried to reverse the taper. It might improve the performance. I say something about this on one of the math channels. It has got to do with the stability of the system and the inherent instability of the shape you have used for the bearings
Heck yeah, bike! Also is the resistance repeatable so is this a sort of torque wrench depending on how big the surface of the contact area is compared to size of the mechanism itself. There's easily an entire series here, great find!
Ever considered going to work for SpaceX or Tesla ? I would be sad to loose your channel but I'm pretty sure you are exactly the kind of people they are looking for !
I'm a 50 yo dude that has been doing AutoCAD since 1989 from ITT Tech. I love your channel your stuff is awesome my dude I will continue to follow you and game info from you thank you Bob Allen Silicon Valley
DUDE! your designs are awesome! well done! your understanding of design, printing and just thinking outside of the box is awesome! keep up the great work champ!
I remember seeing the roller clutch mechanism advertised about 20 odd years ago for a Shimano STX RC mountain bike wheel hub. I loved the idea back then but I think there was a reason they didn't continue with the design.
Awesome design! Yes please test a larger model of the one way bearing clutch on a bike! Could you also make a 3D printed ratcheting clutch that it much more sturdy and then test it out on a bike as well?
Have you tried changing the angle of the "ramp" that pushes the roller outward to see if it affects the maximum locking force it can generate? I think steep and shallow angles will produce different characteristics. Steeper angles will force the rollers outward more strongly but will not engage as easily initially. You might even make a hybrid clutch design where some of the rollers have different ramp angles or diameters to tune the behavior in desirable ways.
Very clever! One problem with the design, however, is that most or all of your friction when rotating in reverse is probably on only one or two rollers.
