 | | My Lego planetary gear
|
|
I was working on transmission ideas, and I came up with a cute planetary. It can produce several different types of output, and it is typically used in transmissions. My implementation is compact, and doesn't use too many parts. I'm not sure that it (...) (24 years ago, 3-Oct-00, to lugnet.technic)
|
| |
| | Re: My Lego planetary gear
|
|
(...) (24 years ago, 3-Oct-00, to lugnet.technic)
|
| |
| | Re: My Lego planetary gear
|
|
That is certainly compact. Do you have any ideas how it might be used in an actual model? I suppose locking either the top half or the bottom half, or both, would change the way the output shaft differs from the input shaft? Although what I would (...) (24 years ago, 3-Oct-00, to lugnet.technic)
|
| |
| | Re: My Lego planetary gear
|
|
By locking the outer ring, in acts as a 2:1 or 1:2 gear (depending on which shaft you use as input and which as output. If you lock the planets, it turns into a 1:1. If you let everything loose, it is a neutral gear. If you lock the output shaftand (...) (24 years ago, 3-Oct-00, to lugnet.technic)
|
| |
| | Re: My Lego planetary gear
|
|
You can actually get very similar behaviour using a standard differential. If you hold one "output" shaft, and turn the other, the crown wheel turns at half the input speed. The advantage of planetary gears is the output shaft is in line with the (...) (24 years ago, 4-Oct-00, to lugnet.technic)
|
| |
| | Re: My Lego planetary gear
|
|
Ah. Hm, I wonder if it could be used for a lego transmission. I cleaned up my first planetary gear, and I came up with a second implementation. It is bigger, and it is not obviously a planetary system, but I think it is topologically equivalent. It (...) (24 years ago, 4-Oct-00, to lugnet.technic)
|
| |
| | Re: My Lego planetary gear
|
|
That alternative implementation gives me an idea. What about putting gear wheels around on arms sticking out at various angles and held together by structural Technic parts, and having various combinations meshing with each other? The only problem (...) (24 years ago, 4-Oct-00, to lugnet.technic)
|
| |
| | Re: My Lego planetary gear
|
|
(...) Planetary gears are still being used as maintainance-free transmission systems for bycicles, build inside the back nave. They work very well, I own a bike that has 7 gears crammed inside a ±10 cm diameter hub. Greetings, M. Moolhuysen. (24 years ago, 4-Oct-00, to lugnet.technic)
|
