Four Bar Linkage Prototype

Sun, 10 Jun 2012

The four bar linkage is a simple mechanism with a whole variety of interesting uses. I'm working on a project that uses a four bar linkage to power a hammer wielding robot. A similar layout was originally shown on this mechanism page. I am provisionally calling it, The Hammer Bot.

The two vertical linkages, two and three, are roughly the same length. Linkage four is a lot shorter that the fixed linkage, linkage one, so as the mechanism moves the arm linkage (one) rotates and with it, the arms and hammer are rotated downwards. 

I have put together a fairly two dimensional  version of the mechanism to see how the linkage will work. Looking good, I think you'll agree.

Next step is to give everything depth, a 3D head and hammer and a solid body, after which I'll be deciding whether to drive the mechanism with a crank and handle or a push button.


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Comments (4)

  • Smelter June 10, 2012 at 3:32 pm

    I like the name.
    Forge ahead

    I like the name.

    Forge ahead Rob.

    🙂 – RI

  • cool022883 June 10, 2012 at 4:00 pm

    maybe you could make it  a

    maybe you could make it  a caveman with a club so it can battle the mighty t-rex to see who can rule the wonderful world of paper =)

    Tee hee, that might be fun 🙂 – RI

    • umehta June 11, 2012 at 2:23 am

      Or maybe an ostrich?

      Or maybe an ostrich?

      • JohnW March 20, 2016 at 4:00 pm

        I would of have loved playing

        I would of have loved playing with this prototype. Too bad it wasn't made into a download.

        The Hammer Robot was a fun model to build and chase the grandchildren around the house. Now they grab it and chase me around the house whenever they're here!


        Take Care,


Comments are closed.