Name for this mechanism?

john_reed263
john_reed263 Member Posts: 11 EDU
in Community Support
Hi All,
Does anyone know the name of this mechanism?  Its used inside mechanical windup toys.  The hexagonal axle can rotate clockwise but not counterclockwise due to the interaction of the purple part and the orange gear housing.  The purple part can deform to accommodate motion clockwise but not counterclockwise.  I've been calling it a clutch but there must be a specific name for it. Thanks
https://cad.onshape.com/documents/db1a5377bdffcb1de001dc4a/w/d59c214ccd7b24340fafdf5c/e/358856ecd0f9823a4da012b3?renderMode=0&uiState=65779257bfffc6369e2508d8 

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Best Answers

  • MichaelPascoe
    MichaelPascoe Member Posts: 2,955 PRO
    edited December 2023 Answer ✓

    In general, that is a Ratchet mechanism. Though I'm not sure if there is a name for a ratchet built into a gear like that.


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  • martin_kopplow
    martin_kopplow Member Posts: 1,630 PRO
    edited December 2023 Answer ✓
    As an owner of one of these super rare bicycle thingies, which miraculously only run forward, I would have guessed this might be a freewheel mechanism. ;0) (A thing that can BTW unfortunately not be simulated in Onshape, for mates always work both ways.)

Answers

  • MichaelPascoe
    MichaelPascoe Member Posts: 2,955 PRO
    edited December 2023 Answer ✓

    In general, that is a Ratchet mechanism. Though I'm not sure if there is a name for a ratchet built into a gear like that.


    RENDERCAD - Photorealistic product rendering.
    CADSharp - Professional CAD + software consulting.

    ▚▞▚▞▚▞▚▞▚
  • martin_kopplow
    martin_kopplow Member Posts: 1,630 PRO
    edited December 2023 Answer ✓
    As an owner of one of these super rare bicycle thingies, which miraculously only run forward, I would have guessed this might be a freewheel mechanism. ;0) (A thing that can BTW unfortunately not be simulated in Onshape, for mates always work both ways.)
  • john_reed263
    john_reed263 Member Posts: 11 EDU
     I was overthinking this.  Of course its a ratchet and behaves like a freewheel on a bicycle.  Thanks.

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