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Show me your Universal Joints

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by Psionic001, Feb 9, 2019.

?

Do you make your own Joints or buy after market

  1. Designed and Built my own joints

    16.7%
  2. Purchased after market

    50.0%
  3. Found another way to use joints

    16.7%
  4. I don't use joints

    16.7%
  1. Psionic001

    Psionic001 Active Member Gold Contributor

    Joined:
    Mar 5, 2017
    Messages:
    115
    Location:
    Sydney
    Balance:
    802Coins
    Ratings:
    +48 / 0 / -0
    My Motion Simulator:
    Motion platform, 6DOF
    I think the most difficult part of my 6DoF Stewart platform so far was finding the perfect universal joint for the ends of my Linear Actuators.

    I'm now on my V2 universal joint and I think it will be perfect. I designed them in Solidworks and had them manufactured in China. These are 7075 aluminium, sandblasted and anodised.

    Version 1 worked ok, but there was a tiny bit of rattle and slop. This version is nice and solid.

    This might be a good opportunity for others to show what solutions they are using for their Universal joints (U-Joint, Cardan Joint).

    Attached Files:

    • Informative Informative x 1
  2. Ads Master

    Ads Master

    Balance:
    Coins
    Ratings:
    +0 / 0 / -0
  3. Uros

    Uros New Member

    Joined:
    Oct 9, 2014
    Messages:
    3
    Balance:
    227Coins
    Ratings:
    +0 / 0 / -0
    My Motion Simulator:
    2DOF, SCN6
    And how much did you pay for one pcs?
  4. Psionic001

    Psionic001 Active Member Gold Contributor

    Joined:
    Mar 5, 2017
    Messages:
    115
    Location:
    Sydney
    Balance:
    802Coins
    Ratings:
    +48 / 0 / -0
    My Motion Simulator:
    Motion platform, 6DOF
    I paid $60usd plus my design time plus shipping, plus the trunnions bearing.
    • Informative Informative x 1
  5. sam poole

    sam poole Active Member

    Joined:
    Nov 14, 2017
    Messages:
    134
    Location:
    midlands
    Balance:
    521Coins
    Ratings:
    +41 / 0 / -0
    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform, 4DOF, 6DOF
    That's a lot of uj how big is your rig?
  6. Psionic001

    Psionic001 Active Member Gold Contributor

    Joined:
    Mar 5, 2017
    Messages:
    115
    Location:
    Sydney
    Balance:
    802Coins
    Ratings:
    +48 / 0 / -0
    My Motion Simulator:
    Motion platform, 6DOF
    In terms of size for the 6DoF platform it is 1.4m diameter at the base. 6 actuators. Each actuator has a 490mm stroke and pushes 120kg at 500mm/sec.

    They need to be strong.


    • Like Like x 2
  7. Will974

    Will974 New Member

    Joined:
    Jan 11, 2020
    Messages:
    10
    Occupation:
    Industrial Ingeenering Teacher
    Location:
    Reunion Island
    Balance:
    87Coins
    Ratings:
    +5 / 0 / -0
    My Motion Simulator:
    6DOF
    Hi psionic ,
    i find your u joint very interesting. I look also for this design for my 6 dof. Please can you give me the name of your manufacturer ? Or perhaps do you have the link of good seller for u joint ? I have the capacity to concept my u joint on solidworks but if someone have directly the right solution or seller, i will earn time in my project. Thanks for your advice.
  8. Psionic001

    Psionic001 Active Member Gold Contributor

    Joined:
    Mar 5, 2017
    Messages:
    115
    Location:
    Sydney
    Balance:
    802Coins
    Ratings:
    +48 / 0 / -0
    My Motion Simulator:
    Motion platform, 6DOF
    Search Alibaba.com.
    there are hundreds of companies that CNC machine manufacture aluminium parts.
    cheers


  9. Will974

    Will974 New Member

    Joined:
    Jan 11, 2020
    Messages:
    10
    Occupation:
    Industrial Ingeenering Teacher
    Location:
    Reunion Island
    Balance:
    87Coins
    Ratings:
    +5 / 0 / -0
    My Motion Simulator:
    6DOF
    Thanks for your answer