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Mechanism with up and down movement?

  1. Sep 7, 2008 #1
    Hi ... I was trying to figure out a mechanism which allows for up and down movement. I figured a piston with crankshaft... anyone has any other possibilities?
  2. jcsd
  3. Sep 7, 2008 #2
    How about an elevator? How about a car jack, or a fork-lift? You need to be more specific in order to answer your question.

    Mainly: size, force, speed.
  4. Sep 7, 2008 #3
    I have a simple mchanism that is composed by 2 pistons as the attached figures shows

    Attached Files:

  5. Sep 10, 2008 #4
    @firevia, how do you plan to move pistons??

    @rvr, there are lot of ways to get linear motion, deciding factor remains the application. You ll have to come up with an application to decide which one to choose.
  6. Sep 10, 2008 #5
    well it is simple , we should install a rod with a cam for the horizental piston and install an electric motor to the (cam-cranck shaft) , velocity can be easily calculated depending on the rpm of the electrical motr , but to make a full design I need configurations.
  7. Sep 11, 2008 #6
    But why do you need the second piston?? You already have a linear reciprocating motion with cam!
    And by the way, the linkage you showed is a double slider 4 bar chain, its an elliptical trammel
  8. Sep 11, 2008 #7
    http://www.sciencemuseum.org.uk/images/object_images/535x535/10302774.jpg [Broken]
    Last edited by a moderator: May 3, 2017
  9. Sep 11, 2008 #8
    a bearing allows for vertical motion
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