Mechanism with up and down movement?

[rvr1974]

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?
Thanks

 

[jaap de vries]

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.

 

[firavia]

I have a simple mchanism that is composed by 2 pistons as the attached figures shows

 

[ank_gl]

@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.

 

[firavia]

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.

 

[ank_gl]

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

 

[ank_gl]

http://www.sciencemuseum.org.uk/images/object_images/535x535/10302774.jpg

 

[rbeale98]

a bearing allows for vertical motion