Hang post clip

I made a clip for hanging on my 2 bar lift and it doesn’t work. How do I make it go in and not just come back out when I flip my lift back down?

I think I understand what your problem is. Most of the videos I’ve seen of robots that hang with a reverse dumper design will drive away from the pole once the hook is engaged. This caused the robot to fall backwards so it’s being supported by the pole. Then they can put the arm down without disengaging the hook.