The big gearbox thread! ^^

[Splat]

@ Splat: On his JurgensTechnicCorner.com website, Jurgen Krooshoop has (25-MB) PDF Building Instructions for his Lego Technic 4-Speed RC Gearbox that utilizes Power Functions:

snip

Thanks DLuders. I've seen that one before, and it is a great piece of mechanical engineering, but a bit big to squeeze into a MOC. I'm looking for something just a little bit smaller

[bekesizoltan]

Thanks DLuders. I've seen that one before, and it is a great piece of mechanical engineering, but a bit big to squeeze into a MOC. I'm looking for something just a little bit smaller

Maybe you just need this: http://www.sheepo.es/2011/11/sequential-4-speeds-mini-gearbox.html

[Lipko]

Here's a bit modified version of Allanp's 2WD/4WD drive (I came up with it independently, after that I saw that his version is pretty similar).

This version lets you use a single selector arm.

http://imageshack.us/photo/my-images/97/p1330440.jpg/

http://imageshack.us/photo/my-images/51/p1330439.jpg/

For some reason, "I'm not allowed to use that image extension"...

[sevs]

Lots to answer here. Think it's gonna be a big post.

Hey Sevs, welcome to the forum!

Are you referring to multi-speed gearboxes (transmissions) used in vehicles, or are you referring to the type used to control multiple functions, like the gearbox in the excavator?

Thanks. This is just ideas. Come up with whatever you want.

On his website, Sariel has a nice (with pictures and description), and this

[media]

He also did this

Yep, I've seen those before. I'm a fan of Sariel ;)

EDIT: The forum told me this: You have posted a message with urls. Due to the fact that spammers really annoy Siegfried members can't post links until they have made 5 posts. Sorry....

Edited December 22, 2011 by sevs

[Alasdair Ryan]

Yes you need to make 2 more posts around eurobricks before you can post a message with urls.

[sevs]

this is a small 2 speed i made, i don't know if it is used before.

i made it for an rc model, i needed 2 gears and not too difference between gear 1 and 2.

the ratios are 1:2.5 and 1:1.536

LINK:

Nice. I made one with bricks (yay, generations since I used bricks in technic) and it works fine. Only that I cant find one 16t clutch to insert.

Yes you need to make 2 more posts around eurobricks before you can post a message with urls.

I know. :)

[DLuders]

UniverLiber posted this

of his 5-Speed Manual Gearbox (which makes a nice display for kids to understand how gear SIZE relates to wheel SPEED):