over centering cams - how do they work?
over centering cams - how do they work?
(OP)
I work for a top aircraft manufacturer customer support division. A question i was asked about one of our business jet aircraft is "does the passenger door utilize over centering cams." I have never heard this term before.
Does anyone know what this is and could you describe how it works....examples???
thanks
Mark
Does anyone know what this is and could you describe how it works....examples???
thanks
Mark





RE: over centering cams - how do they work?
Your knee isn't a "cam", so the analogy only works so far as the effect goes. A cam is cylindrical, but isn't perfectly round. The cam has one (or many) knobs that, when it rotates, can push on another object.
STF
RE: over centering cams - how do they work?
Jay
jayk@dicarinc.net
RE: over centering cams - how do they work?
RE: over centering cams - how do they work?
The beauty of a toggle joint or over center device is that the transverse force applied to the elements to be held in place is dramatically multiplied by the locking/unlocking force. Once locked, the unlocking motion must go back thru the centerline and the unlocking force albiet a small fraction of transverse then must ramp-up to a maximum value as it passes thru center making it very unlikely to unlock accidently even from vibration if designed correctly.
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Leonard