Good morning.
I have an assembly I would like to convert into a mechanism, but I can't
work out what connections to use to make it work.
Picture a bucket going down a well. Imagine there are two vertical rails,
u-shaped in section, diametrically opposite each other, on the walls of the
well. Also imagine there are two lumps sticking out of opposite sides of the
bucket, that engage with the u-shaped rails. Thus, the bucket can go up and
down unimpeded, but can only rotate freely until one of the lumps touches a
part of one of the rails.
Just to complicate things, the rails get closer together at the bottom, so
the bucket lumps are wedged between them. I think that is just an extension
of the basic problem, however, so let's not worry about that yet.
I immediately thought of cams, but they don't work well with a plane running
against a plane, it seems. I tried making an imaginary round thing sticking
out of the lumps, so I had a round thing and a plane, but then I was asked
about depth references for the planar cam elements. I can't work out what
the front, back and depth of a cam surface could mean, so I can't answer the
question correctly.
Sorry. I can't send a picture or model of this problem.
Anyway, how would you approach it?
WF2, M220
Regards,
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