Linear motion translated to rotational 8

[tobee11]

Hello,
I'm interested in learning about gears & mechanisms that translate linear motion to rotational motion. Specifically, I need to translate the motion of straight-line linear motion (essentially straight up and straight down) into rotation, but rotation that is perpendicular to the linear motion.
Imagine a pencil that is inserted through a doughnut. I want to move the pencil up and down. I want the doughnut to rotate in one direction when the pencil moves up & and the opposite way when the pencil moves down.
Apologies for the crude description; I hope it makes sense.

Thanks very much.

 

[unclesyd]

Take a look a the pawl and worn of level-wind mechanism on a fishing reel.

 

[desertfox]

Hi tobee11

Unless I am missing something, if the top disc is connected to the sleeve which is pulled down by 1", then the top disc also moves down by 1".
You said earlier the top disc can't move down by that amount.

desertfox

 

[tobee11]

Hi Desertfox,

I have attached a few, more clear design sketches with some more detail on how I envision the system possibly working. When thinking of the ratcheting screwdriver, I was thinking that the top disc wouldnt need to move up or down at all. I thought of the top disc as being like the tip of the ratcheting screwdriver; it only rotates (I think). The rod attached to the middle of the top disc slips into an open channel within the sleeve and this is where the ratcheting action takes place. I thought that the interaction within this channel could produce the needed rotation.

Hopefully, the sketches are clear and make sense. Thanks again for all your help.

Tobee11

 

[desertfox]

Hi tobee11

Okay beginning to see now, so the top disc will actually sit on the disc with the magnets, unlike your original sketch where it shows a gap between the magnets and the underside of the top disc.
now going back to your post of the 20th how are you going to connect the sleeve to the top disc to achieve rotation only if you don't use the ratchet method.

desertfox

 

[tobee11]

Desertfox,

To achieve the rotation only motion, I was planning on simply connecting the bottom of the rod which comes off the top disk to the bottom cover of the sleeve. In this way, the top disk, its rod and the sleeve would act as one single component. Obviously they would have to be assembled with the central core in between.

Does that make sense?

 

[desertfox]

Hi tobee11

Yes I can see better now what your trying to do, the point I as was making was the ratchet connection will allow connection between the sleeve and top plate and achieve the rotational movement you require,I can't see a simpler method of connecting them at present that doesn't cause problems with pulling the top plate down vertically which your trying to avoid.

desertfox

 

[tobee11]

Desertfox,

Thanks again for all your insights. Im going to get to work on the rotational sleeve version. Take care and thanks again to everyone.

Tobee11