Functional Rating

Technical Communication
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1

Hello everyone, I would like to determine the functional clearance necessary so that the doors of a double door cabinet do not rub when opening/closing.

For that you would have to help me find the chain of odds.

I am attaching a very simplified cross-section view of the assembly. For information, the clamp is welded to the body and the pivot to the door. The connection between the two is via an axis.

I have not depicted the second gate in its entirety, but it is identical to the first.

At the same time, I try to solve the exercise.

Thank you in advance and have a good day.


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2

Hello @david.garcia 

I see 2 possible cases; simultaneous opening of the 2 doors, OR opening of door 1 and then door 2.

"Simultaneous" case:

In this case, the meeting point of the 2 doors is located between the 2 axes. It is then sufficient to know the space between the axes to deduce the length of the diagonals of the internal ends of the 2 doors. For example, here the space between axes is 80, so one of the diagonals is 50, the other must not be more than 30. For the small "step", the explanation is the same as the case below (unless this small "step" is wider, in which case its resolution will be rather identical to the present case).

"Successive" cases:

In this case, the meeting point of the 2 doors will be the intermediate point of gate 2 (side min 35) whose diagonal with the axis of door 1 is 35. The diagonal with the point of the inner end of gate 1 (max side 35) must therefore not exceed 35. The same principle applies to the small "march" of 37.

Hoping I have been clear.


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3

Hello Sylk.

Indeed, I had remarked that I had not specified the type of opening which is successive (in 2 steps: opening the door right first and then the left one).

I understood your approach perfectly, but I can't see how to make the link between the values of the internal diagonals (as explained in the "successive cases" paragraph) and the dimensions obtained.

For me it is the value of diagonals necessarily depend on the dimensions of the unfolded, then on the value of the folds, the dimensions that determine the positioning of the punches, the dimensions of the machined pivots/clamps etc..

That's why I'd like to determine a dimension chain, to finally get the equation that would take all this into account

I think I'm going to consider the pivot set as an infinitely rigid set that I'll deal with in a second step. (see image below)


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