Subject:
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Re: Scissor Lift in LEGO?
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Newsgroups:
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lugnet.technic
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Date:
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Mon, 6 Mar 2006 17:26:35 GMT
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Viewed:
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7973 times
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> Have you ever tried building a scissor lift in LEGO? I’m working on a project
> that calls for that kind of mechanism to lift it up, like those food service
> trucks at the airport. It is based on an “X” shaped arrangement, which, like
> the two parts of a scissors pivot at the middle. By bringing together the two
> bottom (or top) ends, the top is lifted into the air.
>
> The approach I took was to use Technic worm gears (like a screw) with a rack
> gear on it. By turning the worm gears the rack gear should move along its
> length, which moves the two bottom ends together, elevating the top. The
> problem is that LEGO gears just aren’t up to the load this places on them,
> and the teeth skip. I motorized it, gearing down the motor to get more
> torque, but the gears would rather skip than lift the weight.
>
> Has anyone out there successfully built this kind of scissor lift mechanism
> in LEGO to lift a nontrivial weight? If so please reply here,
> <http://www.brickpile.com/2006/03/03/scissor-lift-in-technic/#comments
> comment on my blog> or email me any tips you may have. Thanks!
>
> --Bill.
Hi Bill.
I came up with a design about a month ago. It was never finished, but may be in
the future.
http://www.brickshelf.com/cgi-bin/gallery.cgi?f=169187
The only problem is that the way I have it angled, the pistons have to push hard
at the beginning of the ascension. However, this is the best way I could come
up with to maximize the relative travel of the pistons. All you would have to
do is change the angle to get either a high rise with bad mechanical advantage
or a short rise with high mechanical advantage If you want me to finish it or
have any questions, let me know.
Nathan Bell
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Message is in Reply To:
 | | Scissor Lift in LEGO?
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| (cross posted to (URL) blog> and BayLUG Mindstorms mailing list) Have you ever tried building a scissor lift in LEGO? I’m working on a project that calls for that kind of mechanism to lift it up, like those food service trucks at the airport. It is (...) (19 years ago, 3-Mar-06, to lugnet.technic, FTX)
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