Apr 20, 2004 06:55
20 yrs ago
2 viewers *
English term

positive key clutch

English Tech/Engineering Mechanics / Mech Engineering
sensors, light barriers

example of applications that cannot be used with the system I am translating

Full Revolution Devices
A type of machine drive arranged such that, once started, the machine can only be stopped when the full cycle is complete. Examples include ***positive key clutch*** machines and similar mechanisms.

Responses

+7
14 mins
Selected

*

the movement derived from a driver, or the grip or hold of a restraining piece, is communicated through an unyielding intermediate piece or pieces; as, a claw clutch is a positive clutch, while a friction clutch is not
Peer comment(s):

agree Vicky Papaprodromou
1 hr
agree Tony M : Good explanation! Clearly, the 'key' is an added factor; I take it to mean 'positive engagement IN A SPECIFIC (number of...) POSITION(S)'
1 hr
agree Hacene
2 hrs
agree Lamprini Kosma
2 hrs
agree elenus
5 hrs
agree Alfa Trans (X)
8 hrs
agree mrrobkoc
9 hrs
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4 KudoZ points awarded for this answer. Comment: "Thanks Dadrum and Dusty, I would like to split the points between you two but it's not possible, I chose Dadrum's answer because his mentioning of claw clutch pointed me to the right translation, anyway Dusty's answer was very helpfull in explaining to me the concept, thanks again!"
+1
10 mins

See explanation below...

I'm not specifically familiar with this term, but from my general engineering knowledge, I would interpret the idea as follows.
I don't think this is a particular type of machine, but just a class of machines that use a drive via a PKC.
In this sense, I see 'positive' as meaning 'definite', and so the idea of 'positive key' means that the clutch engages in a definite manner --- a 'key' engaging in a 'slot' for example (as distinct from a plate-type clutch, which can engage in any random rotational position, but is not 'positive', as slippage is always possible) --- the use of the 'key/slot' idea means that the clutch can only be engaged in one (or a number of...) specific rotational position(s) --- as might be expected from a machine that has to complete an exact number of revolutions before stopping.
This would all be consistent with the kind of exclusions from the safety system mentioned in your context.
Peer comment(s):

agree David Moore (X) : I take it you pressed the wrong confidence level button....Good explanation
32 mins
Thanks, David! No, just humble enough to know the limits of my knowledge... :-)
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