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Mechanism with up and down movement?

by rvr1974
Tags: mechanism, movement
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rvr1974
#1
Sep7-08, 09:23 AM
P: 2
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
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jaap de vries
#2
Sep7-08, 11:03 AM
P: 254
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
#3
Sep7-08, 11:06 AM
P: 136
I have a simple mchanism that is composed by 2 pistons as the attached figures shows
Attached Thumbnails
mechanism.JPG  

ank_gl
#4
Sep10-08, 03:58 AM
P: 735
Mechanism with up and down movement?

@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
#5
Sep10-08, 12:10 PM
P: 136
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
#6
Sep11-08, 11:20 AM
P: 735
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
#7
Sep11-08, 11:23 AM
P: 735
http://www.sciencemuseum.org.uk/imag...5/10302774.jpg
rbeale98
#8
Sep11-08, 12:47 PM
P: 52
a bearing allows for vertical motion


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