Multi-Joint Complexity Revisited

[ppwwjones]

The attached model is constructed with built-in dimensional tolerances so all the joint locations are between surfaces. Most joint motions function as intended but several are complex enough that a solution remains elusive. (1) When the Lever arm is moved down it correctly pivots connected links to raise the Lifter. However half way through the motion the Connector and Rollers protrude momentarily through the Lifter top surface. (2) The Swivel is designed to be rotated upward 45 degrees by the Push Rod when engaged by Left Link. The challenge is to create a joint that provides this motion and that allows Push Rod to float in the Swivel and Left Link slots. The joint(s) at both the Swivel and Left Link require both sliding and rotation as they rotate and move up and down simultaneously. How can the motions be realistically simulated with the Push Rod?

[davebYYPCU · Accepted solution]

Couple of things, 

The motion link's Slider - is a vertical lift direction, the rollers are lifting by a revolute joint,

the Revolute joint can not deliver a linear range of motion / speed as it approaches the top of the arc. That area will need a contact set.

Last time I looked at this, I was of the impression the pushrod face highlighted in yellow, and the bracket faces making the 90 corners were to remain in contact, at either end, gravity holding it down, 

The centre point of the pink slot marked up, (Pin slot) running parallel to the bracket face will deliver that, the red travel line here being the approximate joint limits.

Or am I on the wrong page?  

[ppwwjones]

Attached is another illustration that may clarify the Push Rod geometry, function, and intended motion. Any advise on how to simulate this will be greatly appreciated.