U-joint, CV-joint, Thompson coupling

Discussion in 'Propulsion' started by brian eiland, Mar 16, 2007.

  1. Tigawave
    Joined: Sep 2007
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    Location: Buckland

    Tigawave Junior Member

    There is nothing wrong with a Cardan shaft or CV joint but they have limitations that have been overcome with the Thompson coupling. Mostly power loss and very limited running angles. You also need to look carefully at the input and output angles of the Cardan shaft to prevent excessive wear or vibration.

    The Thompson coupling allows installations with large angles and will run smoothly. In boats this means you can run the engine flatter and as such it takes up less space, whilst also having a smooth drive train.

    For many marine applications the Hydradrive, Aquadrive, Python drive systems with a thrust bearing are good at isolating engine movement from a fixed shaft but where designers want to run larger angles then you can get to the limits of a cardan shaft or CV joint quite easily.
     
  2. Ad Hoc
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    Ad Hoc Naval Architect

  3. Tigawave
    Joined: Sep 2007
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    Location: Buckland

    Tigawave Junior Member

    Yep another great coupling from nearby 2 hours from where I'm based. I first saw it over a year ago, not sure how their developments is going.
     
  4. tom kane
    Joined: Nov 2003
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    Location: Hamilton.New Zealand.

    tom kane Senior Member

    Cardan shafts (wide angle) are available up to 80 degrees and are used in heavy machinery doing heavy work never encountered in marine work. Constantly loaded unloaded from load to backlash.
    U/V joints have bearings not friction surfaces like some other joints,the World would stop moving without them.
    I would certainly like to see Thompson coupling working under thrust and pressure for long periods. I don`t say they are not superior to other joints.
     
  5. tom kane
    Joined: Nov 2003
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    Location: Hamilton.New Zealand.

    tom kane Senior Member

    uv-joint,cv-joint,thompson coupling

    The video is misleading on the Thompson web site as in part it displays and talks about a single U/V joint as being a cardan shaft which it is not you need two U/V joints for a C/V joint, with all their knowledge why would they try deceiving viewers on such an important feature surely they must know two U/V joints back to back is a constant velocity joint.
    Other videos showing the working of U/V joints employ this misleading tactic,what are they trying to hide.
     

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    Last edited: Mar 1, 2017
  6. Angle X
    Joined: Dec 2016
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    Location: Huntington Beach

    Angle X New Member

    X-joint

    This joint is close to my new Spherical dynamic universal coupling I designed. I call it the X Joint. I just started our first production run of 500 parts. The dynamics at high angles are some of X Joint the gains testing compared to U joints.
    I seen the Punk joint won a award.


    OCB

    https://youtu.be/HanmczKdzVg

    [​IMG]
     
  7. Irie
    Joined: Jul 2016
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    Irie Junior Member

    You tube says the video is private. How much are you selling them for?
     

  8. Angle X
    Joined: Dec 2016
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    Location: Huntington Beach

    Angle X New Member

    X joint Video

    I fixed the link to the you tube video. I will start my own tread with more details soon.

    OCB
     
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