Subject:
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Re: 1 motor 2 speed transmission
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Newsgroups:
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lugnet.technic
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Date:
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Wed, 20 Sep 2000 15:38:54 GMT
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Viewed:
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2679 times
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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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Message has 1 Reply:
 | | Re: 1 motor 2 speed transmission
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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> (...) (24 years ago, 20-Sep-00, to lugnet.technic)
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Message is in Reply To:
| | 1 motor 2 speed transmission
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| 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 (...) (24 years ago, 20-Sep-00, to lugnet.technic)
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