• Welcome to engineeringclicks.com
  • Alternatives to Strain Wave Gears?

    Discussion in 'The main mechanical design forum' started by cj7hawk, Jun 30, 2021.

    1. cj7hawk

      cj7hawk New Member

      Joined:
      Jun 2021
      Posts:
      1
      Likes Received:
      0
      Hi All,

      I'm looking to find/build small compact servo motors, eg, 80~200mm diameter, <100mm length, 200watts output, > 5Nm torque, 360 degrees / second... On the order of that kind of servo, while also ideally being lash-free, or at least with low lash.

      I was looking at strain wave gears ( harmonic drives ) but these seem to cost around $1000 each, and most are solid centered, so would require an external motor.

      I'm looking for similar ideas ( ratios > 10:1 in a single stage, up to 200:1 ) in a small size, with high efficiency ( > 90% minimum ), ideally few parts, and which can incorporate a motor and a reduction system within a very small size with a very high output power.

      What alternatives to strain wave systems exist that are inexpensive, ideally can be built without needing a factory or expensive CNC equipment ( eg, 3D printed would be ideal ) and would be suited to large scale robotics?

      All I can find presently is cascaded planetary systems, strain-wave drives, some 3D printed strain-wave drives ( that seem a little flimsy to ask for any serious torque ) and such.

      Does anyone have ideas that they can send me for existing products that do this kind of function? What should I be thinking of? What have I missed considering? What designs address this requirement?

      Any and all suggestions appreciated?

      Thanks
      David
       
    2.  
    3. henryjames945

      henryjames945 New Member

      Joined:
      Jul 2021
      Posts:
      1
      Likes Received:
      0
      Belt Conveyor Systems | Conveyor Belt Types | Ultimation: Belt Conveyor systems are the most versatile and simplest material handling systems. They work with two or more pulleys driving a looped belt.


      For more information about Conveyor Systems visit ultimationinc.com
       
    4. s.weinberg

      s.weinberg Well-Known Member EngineeringClicks Expert

      Joined:
      Nov 2012
      Posts:
      315
      Likes Received:
      0
      As you already mentioned, planetary gears are highly versatile. If you go with a more complex design, you can get quite a high reduction in a fairly tiny space.
      Cycloidal gearing is another option you should explore.
      Rumour has it, contrary to popular belief, that you can achieve fairly decent efficiency with a relatively low reduction worm gear (something in the 10:1 or 15:1 range).
      Lastly, you'd be shocked at how small you can package a simple spur or helical drive train. I used this sucker for a project once: https://www.pololu.com/product/1595/specs
      It's 10x12 x 29.5mm WITH THE MOTOR and the gearbox is nearly 1000:1
       
    5. Oilytrunk

      Oilytrunk Well-Known Member

      Joined:
      Nov 2017
      Posts:
      98
      Likes Received:
      0
      This should do.
       
    6. chrstopher007

      chrstopher007 Member

      Joined:
      Mar 2021
      Posts:
      8
      Likes Received:
      0
      Belt conveyors system is a potential alternative. It has both versatility and high-capacity for handling bulk material in short span of time.
       

    Share This Page

    1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies.
      Dismiss Notice