Stay Hinge Joint

[keith1]

Having received some much-welcomed help with getting my case lid to pivot correctly, I wish to replace the two separate hinge parts, with a combined version, so that the stop bar of the hinge acts mechanically correct.

I've created the combined stay hinge, with a 'revolute' joint for the top section, limited to 95 degrees. I've also added a 'slot' joint for the stop bar (with limits), which seems to work well. Not sure I need the limits on the sliding part, as the main revolute joint already has the limit.

I'm having difficulty adding a second 'slot' joint for the other end. I assume it's possible to add more than one 'slot' joint?

[jhackney1972 · Accepted solution]

You may want to play with the Pin-Slot joint limits to find a better limits setting than I have.  You have a close tolerance between the ends of the available slots.  Model is attached.

[keith1]

Thanks John.  That's exactly what I was after.

The stop bar (on the actual piece of hardware) is just floating in the 'groove' of the dishes, and it can move approximately 22mm up and down. It can also move left to right a few mm, as it's captive between the two dish sections and secured in place by the two hinge plates.  Hence the reason I added the two oval-shaped pieces, so that I could use them as references for the sliding motion. These are not on the real hardware but as they're between the hinge plates and the dishes, they won't be seen. Plus, I can always hide them if needed.

Another problem I now have is that when I bring in the revised stay hinge (with the working stop-bar), the revolve/slider joints no longer work. They appear in the browser but the component appears as if it's a rigid group. Why is this? 

[jhackney1972]

I assume you mean "place them in an assembly" when you say "bring in".  If this is the case, one component, within the hinge assembly must be grounded once they are Jointed into their position.  The video will show they work just find within an assembly.

[keith1]

Sorry for all the questions John.

I now understand that one of the components of the inserted Stay Hinge needs to be grounded.  I have done this successfully in a test assembly. But I'm now struggling to understand how to add the joint/s from the Stay Hinge to the panel. When I try to add the joint, the Base section of the case ghosts out. I'm assuming that's because it has two 'grounds' (one for the Base section and one that I added for the Stay Hinge component).

I've attached a test assembly which includes a Base, Lid and a Stay Hinge. I've highlighted the edge of the part that the Stay Hinge needs to be jointed to.  So, basically the Lid should pivot and the hinge should follow.

The Stay Hinge will look strange, once it's jointed to the Base/Lid, as it has a cutouts for the dishes and rivet holes (from sketches).  I have created another completed case, where all the cutouts and rivet holes work well, even with the 95 degree hinged lid!  But of course without the one-piece Stay Hinge that has the working stop bar.

Again, I must thank you for your patience and assistance.  I'm getting there slowly!  

[jhackney1972 · Accepted solution]

I apologize, I led you into a false idea.  It is true, a part of the hinge has to be grounded, but that was in my "fictitious assembly, in real life the Joint, to a grounded assembly component, will serve as the grounding the hinge needs to work correctly.  I added the hinge, very quickly, to the surface of your supplied assembly to show what I mean.  Just to be clear, remove the grounding on the hinge component and let the Joint to the grounded component in the case provide the grounding needed.

[etfrench]

What do you get when  you ignore the warning?

[keith1]

Success!!!!  I was having difficulty at first but I persevered and got there.  Thank you again