Need a little help with a mechanism

[Tausen]

I can't seem to figure this out right now, so instead of racking my brain I thought I ask for some help here. When lever "A" moves counter clockwise and I need lever "B" to move clock wise.

Tausen

[terry5732]

All i can think of given just those two parts is gearing at the axis similar to the dfferential in a vehicles rear axle.

[coylo]

We may need more information and I may be off course here, but I think I know what you are getting at. I've investigated this in the past but to no avail. I think what you seek is an idea that has a problem with the word opposite in Newton's 3rd law of motion. If you could get "reaction" to overbalance and not counterbalance then I think you would have a PM machine.

You can get the motion you require by using parallel beams (with two fixed pivot points) but there will be no PM......

At the moment, I'd have to say that it can't be done!
But my research goes on......

[Jonathan]

I'm not sure I understand, but I think I know how to do it, though it may not be practical for you. Take two rods of equal length and attach one end of each to nearby ends of each lever. Then attach the free ends of the rods to a slider. Afix a third rod to the ground radial to the centers of the levers, and have the slider move along it. Now A and B will move equal and oppositely through 90 degrees each. If this is in the vertical plane and you want the levers balanced then you'll need to put an identical system of rods and slider on the opposite side.

[coylo]

You could just add two linkages on each end and turn it into a scissor mech/jack. It would give the motion required to a certain extent.

You need to be more specific.

[Tausen]

After thinkin for awhile,

Two gears linked together does this motion. Where one moves clockwise and the other moves counter-clockwise. I just need to figure out how I can use that, if no one else has a simple solution.

Jonanthan, I am not quite sure what you mean, heh but thats ok I get the idea.

And yeah isnt there some type of tool that works like that instead of squeezing one end with your hands and having it clamp tight, it does the oppisite it goes open? Maybe not.

Thanks all,

T.

[rlortie]

Tausen,

May I suggest you do a little aviation searching for planes with dual counter rotating propellers.

The basic concept is a sun gear fixed to engine and outer propeller, there are three axis held planetary gears. Sun and planet gears are all the same size giving a 1:1 ratio to second or inner propeller. inner propeller hub contains a ring gear that slips over planetary and is held in place by a bearing on main shaft before sun gear and retainer attached to extended sun gear shaft.

A simple version of this can be constructed out of plywood or particle board. First cut four circles all the same diameter and lay them out so you have a center (sun) and and three planetary at 120 degrees from sun. Now measure the outside diameter of group and cut a ring that will loosely fit over planetary wheels. Do not attempt to achieve a tight fit on this outer ring.

Now place electrical friction tape around all four gears and inner radius of ring until you get a non-slip fit. the completed unit of four axis can be attached to another wheel of outside ring diameter.

Not knowing exactly what you have in mind the outer wheel can also be allowed to turn on sun gear axle.

On the other hand I do believe I have in mind of what you are attempting and think you have come up with a brilliant idea. I will not explain here for your protection but I am going to be joining you in this venture as I believe you have an idea that may be a winner.

Ralph

[Tausen]

Thanks rlortie,

I will check it out, I have been rackin my brain on some way I can make this work.

T.

Edit: This is really neat for me I looked that stuff up and got this picture of the gears so people can see what you meant. Too bad I can't really make anything like that hehe, well I could I guess. I have really just been messin with ideas with the wm2d. Dont think I can remake one of these.

[Jonathan]

Here's what I mean.

[rks1878]

Hello Besseler Wheel Posters:

Just thought I'd sign up and tell you all that I've got a wheel design that I'm building in the shop. It will take awhile, as I'm doing it in spare moments from my regular self-employed cabinetmaking job.
It is a small one, just something to test out my drawings.
Has sixteen weights that operate in pairs, but each pair is an independent unit. Also has eight small springs total, one for each unit, and an internal wheel that must be included as a timing device to trigger the action of the weights.
Anyway, if is is a failure, I will post a picture to show, if nothing else, one more idea that doesn't work....
Regards,
Robert
www.cabnut.com

[scott]

Good luck rks! Thanks for keeping us posted.
-Scott