This mechanism doesn't make sense. Hypocycloidal reducers are supposed to eliminate backlash, and are usually driven via the central eccentric shaft and the output is usually the rollers, their carrier, and it's shaft. How you're driving it is through an epicyclic gearset to the rollers with the central eccentric shaft as the output, and the epicyclic gearset introduces backlash to the machanism. You're also losing the benefit of strength on the parts due to the introduction of standard spur gears. Only benefits here is the reduction amount, which you could get from a multi-stage epicyclic gearset
How is the gearbox in the video 2 stage though? Can you correct me if I'm wrong? The split cycloidal rings are moving at the same time I assume the input is the shaft that powers the three eccentric shatfs that move the rings that in turn rotate the whole central carrier via the eccentric shafts. Both rings are powered by the same shafts and are connected by the same pins, so it's a single stage drive?
@@ZealothPL The gears are the second stage. They add one more tooth interface with its associated efficiency loss (and backlash, as Xander Vice pointed out), and although they are 1:1 ratio in this video, it looks like it's designed to fit a range of gear sizes so you can make adjustments to the ratio by swapping them out. It is an interesting design having the eccentric shafts simultaneously function as the output pins, but I think regular cycloidal is better, provided you can get the exact ratio you need.
@@dekutree64 It really helps by not having a one giant eccentric driving shaft/wheel with pins which add a lot of mass and inertia (That's my take on it) I kind of completely ignored the traditional gearing when thinking about stages, as personally I don't think the range of possible ratios is too big before max power transmission rating starts to suffer. Also, I was designing a true two stage cycloidal transmission (as in both stages were cycloidal gears) mainly for a massive reduction ~200:1 (and at least relatively high intermittent power output compared to said reduction in a small package - I don't remember fully, but it was something like at least 100W going through less than 800g in total :D) in lightweight applications (light robots, but with a manipulator that had serious lift capability) Maybe I'll come back to finish the project some other day
Maybe you didn't realize that basically the only new principle involved is that instead of power being generated by the relative motion of conductors and fluxes, it is produced by the modial interaction of magneto-reluctance and capacitive duractance. It's easily overlooked.
Мне кажется, маленькие подшипники (3 шт) слишком быстро вращаются, со скоростью вращения входного вала, они должны вращаться медленно со скоростью выходного вала. - I think small bearings (3 pcs) rotate very fast, as input shaft, but they must rotate slow as output shaft.
So beautiful it brought a tear to my eye!
It is unique
alright calm down
Wow, what a combination. Cycloidal and planetary gear together. Crazy Outside Torque
There aren't any planetary gears.
Beautiful graphic! I've basically learnt how a cycloidal gearbox works!
Wow it is just amazing work🔥🔥🔥🔥🔥🔥
What a combination of gears!!!!
sensacional tecnologia e perfeição.
ayyy who's here because Prusa is now using a cycloidal gearbox in their new XL printer
Is this suitable for robot joint? 1moa translates to about 0.5mm for a 1.6m arm.
1 problem how to do ensure its well oil since the inside gear are lock away
Do you manufacture 1400kW 1:200 gear box ?
Nice SImulation
I want one, for my bicycle ;p
Gears of war
запатентовано ?
wow
could one put that into a harmonic drive to make a very compact large gear ratio gear box?
Does having an extremely logical (did I really need the word extremely?) mind help in designing gear mechanisms?
nice mesin
Had to go rub one out to this
This mechanism doesn't make sense. Hypocycloidal reducers are supposed to eliminate backlash, and are usually driven via the central eccentric shaft and the output is usually the rollers, their carrier, and it's shaft. How you're driving it is through an epicyclic gearset to the rollers with the central eccentric shaft as the output, and the epicyclic gearset introduces backlash to the machanism. You're also losing the benefit of strength on the parts due to the introduction of standard spur gears.
Only benefits here is the reduction amount, which you could get from a multi-stage epicyclic gearset
It is already mass produced.
How is the gearbox in the video 2 stage though?
Can you correct me if I'm wrong?
The split cycloidal rings are moving at the same time
I assume the input is the shaft that powers the three eccentric shatfs that move the rings that in turn rotate the whole central carrier via the eccentric shafts. Both rings are powered by the same shafts and are connected by the same pins, so it's a single stage drive?
@@ZealothPL The gears are the second stage. They add one more tooth interface with its associated efficiency loss (and backlash, as Xander Vice pointed out), and although they are 1:1 ratio in this video, it looks like it's designed to fit a range of gear sizes so you can make adjustments to the ratio by swapping them out. It is an interesting design having the eccentric shafts simultaneously function as the output pins, but I think regular cycloidal is better, provided you can get the exact ratio you need.
@@dekutree64 It really helps by not having a one giant eccentric driving shaft/wheel with pins which add a lot of mass and inertia (That's my take on it)
I kind of completely ignored the traditional gearing when thinking about stages, as personally I don't think the range of possible ratios is too big before max power transmission rating starts to suffer.
Also, I was designing a true two stage cycloidal transmission (as in both stages were cycloidal gears) mainly for a massive reduction ~200:1 (and at least relatively high intermittent power output compared to said reduction in a small package - I don't remember fully, but it was something like at least 100W going through less than 800g in total :D) in lightweight applications (light robots, but with a manipulator that had serious lift capability)
Maybe I'll come back to finish the project some other day
Maybe you didn't realize that basically the only new principle involved is that instead of power being generated by the relative motion of conductors and fluxes, it is produced by the modial interaction of magneto-reluctance and capacitive duractance. It's easily overlooked.
Мне кажется, маленькие подшипники (3 шт) слишком быстро вращаются, со скоростью вращения входного вала, они должны вращаться медленно со скоростью выходного вала.
-
I think small bearings (3 pcs) rotate very fast, as input shaft, but they must rotate slow as output shaft.
Machinery porn.