Subject:
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Fw: gear differential
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 19 Nov 1998 19:47:15 GMT
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Original-From:
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Tom Rowton <TROWTON@BROADCASTstopspam.COM>
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Viewed:
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1851 times
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I could be wrong, because I can't open my Mindstorms yet(b-day not til
12/11) but it seems logical that you could use the gear differential, or a
jury rig of one, to drive however many distinct items as there are gears by
redirecting the output.
Just a thought, but it could increase the number of effective motors by a
multiplier of the number of gears.
trowt
-----Original Message-----
From: Tim McSweeney <tim@ams.co.nz>
To: lego-robotics@crynwr.com <lego-robotics@crynwr.com>
Date: Thursday, November 19, 1998 1:41 PM
Subject: RE: gear differential
> > Actually I'm still proud of it - I built an all-LEGO automatic
> > transmission.
> >
> > Only *how* it worked was by using pairs of the little crown bushings
> > (seemingly defunct as of this year?) as clutches, a pair at • each end of
> > an axle (adjusted very *very* carefully to get exactly zero clearance
> > when turning free) with a worm gear thrusting against a • rubber band to
> > measure the applied force (and of course the usual 2:2 and 3:1 gear
> > ratios around the two ends)....
> > Its easier to build transmissions using the freewheels 16t
<snip>
Those freewheeling gears are really cool. I just bought the Technic Shuttle
and it comes with a whole lot of them It uses them in quite a complex
gearbox to drive all of the operations of a single motor. If you take
another look at the gears you'll notice the are sort of hollow, but on the
inside there are little ridges that stick out. The Gearbox includes another
piece that slides on a shaft and locks into these. really neat and compact,
makes wonderful clutch. I suspect It was first used in the gearbox of the
super car.
All I have to do now is work out a use for them with mind storms.
Cheers
Tim
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Message has 1 Reply:
 | | RE: gear differential
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| Yeah I had thought of that but the problem is you need one motor to do the driving and one motor to do the switching, The way the gearbox is presented in the model only This only gets you two outputs,, so you haven't gained anything, in fact you've (...) (26 years ago, 19-Nov-98, to lugnet.robotics)
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