I'm trying to create two arms on either side of a particular machine that will press against a respective wall, and keep it in place despite a significant ammount of upward pressure. I assume this means I will need to use some sort of hydraulic. The actual device needs to fit in a space no larger then 4"x9"x9", and it needs to work off of a battery. I don't know anything about hydraulics. Can someone point me in the right direction? Thanks.
hydraulics
Nov 04, 2005
8 Replies
The smug answer would be to hire a mechanical engineer.
OTOH, either a camming or scissor mechanism will generate a sideways force proportional to the upward force with no external actuators.
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Drawing the camming mechanism in ascii art is beyond my abilities.
Sounds like a battlebot project
Hydraulics has a number of great features but energy efficiency is not one of them. If you are battery-powered, you'd do better to stick with electrical actuators. Frex; a way-geared-down permanent magnet motor turning a lead screw. Many motor manufacturers make such widgets, alternatively you can easily scavenge them from powered car seats.
I have several hospital bed actuators with a remote hand controller I was about to put on ebay. Contact me offline if you're interested.
-Mike
On Fri, 04 Nov 2005 12:56:42 -0800, with neither quill nor qualm, Jim Stewart quickly quoth:
To the OP: See your library's section on hydraulics and/or millwrighting, Vox. Audel put out great, thick books on the subjects.
It doesn't appear to -have- to be hydraulic, so in addition, look for the volumes on mechanical devices and mechanisms such as "1800 Mechanical Movements and Devices", "507 Mechanical Movements" or "970 Mechanical Appliances." They are fascinating to page through as you see how someone else has solved your problem. Then you can get to work redesigning it for yourself and your specific need. Is this a class project, kid? ;)
Verily. It's also upside down. He wanted to resist -upward- movement. But your scissor jack could easily work electrically to solve his problem.
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I looked around a little. How do actuators indicate the max load?
A heavy load actuator seems to be exactly what i'm looking for. Unfortuntly, these things are not stocked by most warehouses. Is there a website that stocks more then one brand? Can you guys recommend one that would be ideal for battery power? Thanks.
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Northern tool used to be Northern Hydraulics. They'll have what you need.
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