## Mechanical Linkage?

## Mechanical Linkage?

(OP)

Hello All,

I am trying to design a linkage system to close and open a bypass plate that weights roughly 200lb. I have two fixed points of rotation and the arms are the same length. I don't understand why the bar between them is not the same length at start and end point of the rotation when they are complementary angles. Can someone explain what I am not thinking about. This lever will be operated from the deck above

This is myh first time ever designing something like this as you can tell I'm sure. I am stuck and don't know where to go.

Thanks

I appreciate the help

I am trying to design a linkage system to close and open a bypass plate that weights roughly 200lb. I have two fixed points of rotation and the arms are the same length. I don't understand why the bar between them is not the same length at start and end point of the rotation when they are complementary angles. Can someone explain what I am not thinking about. This lever will be operated from the deck above

This is myh first time ever designing something like this as you can tell I'm sure. I am stuck and don't know where to go.

Thanks

I appreciate the help

## RE: Mechanical Linkage?

fixed where bar 4 is at the end of rotation.

## RE: Mechanical Linkage?

## RE: Mechanical Linkage?

## RE: Mechanical Linkage?

I assume the fixed points are the centers of the circles, and that you are referring to the length of bar 3. The horizontal component of the length doesn't change, but the vertical component does.

pylfrm

## RE: Mechanical Linkage?

So the start/stop angles 195, 315 and 45, 165 will change then.

If that is acceptable there is a solution.

Plus it might be needed to fix bar 4 not to the same node as 1 and 3 are connected.

Hope this is clear!

## RE: Mechanical Linkage?

## RE: Mechanical Linkage?

## RE: Mechanical Linkage?

## RE: Mechanical Linkage?