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Hey, Check out my page www.lcs.net/users/oglewood/
Go under "lego Ideas" and click on the two speed transmission. Also, I have
tried it with four speeds (R-1-2-3) but it gets too big after that. Hope
that helps!
Adam
"Bob Fay" <rfay@we.mediaone.net> wrote in message
news:G16zIL.IJo@lugnet.com...
> I just finished a recreation of your transmission. Great piece of
> engineering. Thanks for sharing your work. I hope I can work this into one
> of my machines.
>
> --
> Bob Fay
> rfay@we.mediaone.net
>
> The Shop
> http://users5.50megs.com/bobfay
>
> http://www.geocities.com/Heartland/Bluffs/7900/
> "Amnon Silverstein" <amnon@best.com> wrote in message
> news:G1640L.Ls8@lugnet.com...
> > Here is a transmission I've been working on. It has two forward speeds 5:1
> and
> > 1:3. If you run the motor one way, you get forward low gear. If you run the
> > motor the other way, you get forward high gear.
> > I am using a differental to split the two directions of rotation onto two
> > intermediate shafts. I am also using 24 tooth gears as pawls. I have the clear
> > holes on live shafts, and the slight drag makes them engage positively when the
> > shaft rotates in the right direction. The two shafts then go through two
> > different ratios of gear trains, and then get recombined with a second
> > differential.
> > The top picture shows the input side. The input goes through a pawl that is
> > shown engaged with a 24 tg that prevents that shaft from rotating counter
> > clockwise. Under it is a little 8tg that transfers power to the big 40tg.
> This
> > is the powertrain for counterclockwise rotation, which is 5:1 reduction.
> > The middle picture shows the splitting differential to the right, and the
> > combining differential to the left.
> > The bottom picture shows the output side, and the power train for clockwise
> > power input. The top 24 tg is a pawl on the input shaft that engages when
> the
> > input is clockwise. The pair of 8tg reverse the rotation to the combining
> > diferential, so this direction gives a ratio of 1:3
> > With a second motor, I think the design could be extended to 3 forward speeds
> > and one reverse.
> >
> > http://www.best.com/~amnon/Homepage/Games/LegoTranny.jpg
> >
> > Send me mail with the word LEGO a the start of the subject to get through
> my
> > spam filter.
>
>
>
>
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This is another nice piece of work. I did not understand it until I
downloaded the Dat file and opened it. Very nice! This is another useable
design. Thanks for posting it. A top view would be really cool on your
website.
--
Bob Fay
rfay@we.mediaone.net
The Shop
http://users5.50megs.com/bobfay
http://www.geocities.com/Heartland/Bluffs/7900/
"Adam Ogle" <oglewood@lcs.net> wrote in message
news:G175u6.MMC@lugnet.com...
> Hey, Check out my page www.lcs.net/users/oglewood/
> Go under "lego Ideas" and click on the two speed transmission. Also, I have
> tried it with four speeds (R-1-2-3) but it gets too big after that. Hope
> that helps!
>
> Adam
>
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