Harmonic Drive® strain wave gear

Harmonic Drive® strain wave gear - zero backlash

Рет қаралды 171,194

9 жыл бұрын

Harmonic Drive® strain Wave Gear Principle: www.harmonicdri...
Harmonic Drive® strain wave gearing utilizes a unique operating principle which is based upon the elastic mechanics of metals. The greatest benefits are the zero-backlash characteristics and the weight and space savings compared to other gears because our gear mechanism consists of only three basic parts. They are the: Wave Generator, Flexspline and Circular Spline. This simple three element construction combined with the unique operating principle allows extremely high reduction ratio in a very compact and lightweight package. Neither the size nor weight of the gear vary with the reduction ratio. The high performance attributes of this gearing technology including zero backlash, high torque, compact size, excellent positional accuracy and repeatability are all a direct result of the unique operating principle.

Пікірлер: 65

@stevengraham7118 3 жыл бұрын

Invention of C. Walton Musser in mid 50's. Munufactured in Peabody Mass., Germany and Japan. After all these years, still state of the art. Used by NASA, defense department, robotics, medical equipment, plus many other applications. All three plants have recently expanded because of demand. Inventor had over 250 patents.

@jamiemacdonald436 Ай бұрын

Update: No longer headquartered in Peabody Mass. The new Headquarters is about 10 minutes away in Beverly Mass.

@andrewwilson8317 6 жыл бұрын

Was used in the hub motors as a reduction gear on the lunar rovers on the moon almost 50 years ago! Still sat on the moon if anybody wants a few free units.

@markuscason7697 3 жыл бұрын

I guess im randomly asking but does anybody know a trick to log back into an Instagram account? I was stupid forgot my account password. I would appreciate any help you can offer me

@merrickyusuf2341 3 жыл бұрын

@Markus Cason instablaster :)

@markuscason7697 3 жыл бұрын

@Merrick Yusuf I really appreciate your reply. I found the site through google and im waiting for the hacking stuff now. Looks like it's gonna take a while so I will get back to you later with my results.

@markuscason7697 3 жыл бұрын

@Merrick Yusuf It did the trick and I finally got access to my account again. I'm so happy:D Thanks so much, you really help me out :D

@merrickyusuf2341 3 жыл бұрын

@Markus Cason no problem xD

@Martin-sd6rg 5 жыл бұрын

Used in FANUC robotic arms for example.

@ccengineer5902 6 жыл бұрын

bizarre design. pretty interesting

@AmericanJusticeCorp 6 жыл бұрын

Torsionally stiff yet radially compliant... hmmm... How much energy is lost in flexion of the flexhub? It is conceivably a spring. Possibly that helps. What about metal fatigue?

@Averell64 4 жыл бұрын

I doubt metal fatigue is an issue here - if it's made out of steel with a cubic room centered grit you can find a max stress where you will have an infinite amount of cycles as long as you don't go over that stress level... If its a metal with a cubic surface centered grit it's a little harder cuz those metals will break at some point but even there you can pretty reliably find a stress level with which you can reach a couple billion cycles (that would be with aluminum and certain non-rust steels like V2A for example) Ps: some translations might be a bit rough due to me not knowing the proper technical terms in English but I hope it gets the point across.

@death_parade 2 жыл бұрын

@@Averell64 I guess you mean Endurance Strength. That is standard for high cycle fatigue applications?

@psychopathgenius5534 6 ай бұрын

Hi, I want to create a mechanical animation like this and I've already designed the components by SOLIDWORKS. Could you please tell by which software I can create the animation? Thanks

@am74343 3 ай бұрын

Doesn't all that flexing damage the central component by constantly stressing it metallurgically?

@djangomueller Ай бұрын

@flewggle 3 жыл бұрын

I cant believe this bearing actually works.

@londonnight937 3 жыл бұрын

I can't believe that bearing exists... It's cursed...

@Jeremy.Bearemy 3 жыл бұрын

It's not a bearing.

@londonnight937 3 жыл бұрын

@@Jeremy.Bearemy What is it then?

@Jeremy.Bearemy 3 жыл бұрын

@@londonnight937 a reduction gearing

@stevengraham7118 3 жыл бұрын

It's been "working" since the 1950's. I have had a number of engineers tell me Mr. Musser was a genius. During his lifetime he was approached about writing a book about his inventions. He refused, telling the writers he had no desire to become famous. Plus, much of his work is still classified by the government.

@dustyroads834 3 жыл бұрын

Must be made from very good steel to be constantly flexed. I would think eventually it would stress crack. ??

@zbnmth Жыл бұрын

with some steels, if you stay under its plastic deformation flex, theoretical expected cycles are infinite.

@bentoniteclaycompany4918 2 жыл бұрын

this is cool and all but tone it down on the music, you didn't solve world hunger

@keenheat3335 6 жыл бұрын

is there a reverse version of this? instead of gear reduction, multiplier version of this?

@macksoneh 4 жыл бұрын

It should be quite simple. Connect the stepper motor to a circular spline instead of a wave generator.

@alainspecteur1 4 жыл бұрын

@@macksoneh can not be back driven

@klave8511 3 жыл бұрын

@@alainspecteur1: See page 2 of www.harmonicdrive.net/_hd/content/LegacyLit/PSAG.pdf. They seem to think it can be backdriven.

@gggggggggg-ms8lm 4 ай бұрын

@@macksonehusually these aren't used with steppers though

@hitchhikingmike 9 жыл бұрын

but does it have infinite life? guessing cycles limited to

@TonyRios 4 жыл бұрын

nothing has infinite life

@argentknight7557 4 жыл бұрын

Can I work for this company?

@BrotherCreamy 3 жыл бұрын

@rocketsalad 8 ай бұрын

hey, @argentknight7557, we fired@@BrotherCreamy, u can work 4 us now

@impactodelsurenterprise2440 4 жыл бұрын

Who the hell comes up with such ingenious ideas?

@barkanugurlu3189 4 жыл бұрын

Hi. Musser did. en.wikipedia.org/wiki/Walton_Musser

@johnlockesghost5592 3 жыл бұрын

Batman.

@stevengraham7118 3 жыл бұрын

C. Walton Musser, google and you will be amazed what all he was credited with inventing. Including WWII recoilless rifle, ejector seat, strain wave gearing.

@comefromethailand7383 Ай бұрын

I want to duy flexspline

@comefromethailand7383 Ай бұрын

HFUC 25-50

@comefromethailand7383 Ай бұрын

H F U C 25-50

@gordonjones1516 4 жыл бұрын

Does anyone else find it odd that this beautifully designed graphic does not actually show the output turning? It literally shows the input drive spinning inside a stationary ring. To truly demonstrate this mechanism the output should be turning at the correct ratio to the input.

@HarmonicDriveLLC 4 жыл бұрын

If you look carefully, you should be able to see that the flexspline is turning very slowly (due to the high ratio)

@timmarrier 3 жыл бұрын

@@HarmonicDriveLLC It absolutely does not move, pause the video at 1:23, cover up any 3/4 portion of the device with a sheet of paper, and focus on the outer ring while bouncing the video back and forth using the arrow keys (while still paused). There is NO rotational change, at least none that I can see. This goes for al your demo video I've so far seen (3 or so).

@andras1154 3 жыл бұрын

@@timmarrier The outer ring is not the output in this demo. The flexspline is the output, and it's visibly turning.

@User0000000000000004 3 жыл бұрын

@@timmarrier I'm not an engineer, just a layman, and I understand it. Why can't you? Wreck your motorcycle while not wearing a helmet?

@elonmusk8711 2 жыл бұрын

@@timmarrier You clearly don't even understand what you are looking at. As others have explained, the flexspine IS the output. It is rotating.

@manikandansanth6826 5 жыл бұрын

What is the reduction of harmonic drive

@HarmonicDriveLLC 5 жыл бұрын

the single-stage reduction ratios for harmonic gears range from 50:1 to 320:1

@nguyentnhoang 8 жыл бұрын

what is the song in this video?

@KodiakTeddy 3 жыл бұрын

I guess you’ll never know

@nguyentnhoang 3 жыл бұрын

@@KodiakTeddy I found something similar or perhaps better. Dexter Britain - The time to Run (finale).

@User0000000000000004 3 жыл бұрын

"Unnecessary Bullshit No. 1"

@DarwinsChihuahua 3 жыл бұрын

Fewer

@mikelemon5109 3 жыл бұрын

Where is the proof it has 0 backlash?

@misterkupsky7252 3 жыл бұрын

Pretty much inside every industrial robot on the planet that use this design, plus every satellite in orbit that reorients its solar panels.

@zbnmth Жыл бұрын

you can model it yourself, use some physics insights. Also the extensive use around the world for this exact property may serve as empirical evidence.

@666pss Жыл бұрын

It still has an outer ring gear and an inner compliant gear. Any clearance between the mating gear teeth will lead to backlash. This can occur through wear and tear from daily use; not just manufacturing tolerances. You can't state with absolute certainty that backlash is zero in practice. It might just be small enough to ignore .