Ratchet Mechanism Modifications

Fri, 30 Aug 2013

I've been busy putting a book project to bed but have had a little time to work on the ratchet mechanism mentioned in the previous post. I'm currently aiming at making a robot with simulated unwinding clockwork key. Possibly the robot will be doing squats and arm raises, not sure yet. 

One thing I do know though is that I want the key in the centre of the back not the side of the box. This involves rotating the mechanism through ninety degrees. I also want to keep the shaft end without the key hidden inside the body.

Here's what I have come up with.


I've also inverted the ratchet tiles. The key turns when the strap is pulled rather than when it is pushed. It is easy to bend the strap when it is pushed but when it is pulled it is quite strong and sturdy. By reversing the direction of the ratchet I've taken advantage of this strength.


Here's the inside view. Plenty of room at the sides to add an arm raising mechanism is that is the direction I decide to go.

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Comments (2)

  • cool022883 August 30, 2013 at 4:01 pm

    the robot project sounds like

    the robot project sounds like it is going to be a great project when done.

    but im also interested in the book project you mentioned.any more information on this book that you can give us?

    I’ll double check with the publisher first. I can say that it is not the same as the ratchet based project though. – RI

    • cool022883 September 3, 2013 at 10:17 pm

      okay i assumed the book and

      okay i assumed the book and the project were related to each other and the book was some kind of paper model book =)

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