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(11) | EP 0 294 561 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Operating mechanism for a circuit breaker |
| (57) The present invention relates to an operating mechanism for a circuit breaker; having
an opening means (3) carrying out open-circuit operation by deenergization thereof
and a closing means (7) carrying out closing-circuit operation by rotation of a cam
(11) caused by deenergization of the closing means so that the opening means conserves
energy by deenergization of the closing means and the closing means conserves energy
by rotation of the cam; and the operating mechanism according to the present invention
is provided with a large gear (8) fixed coaxially with the cam and lacking in teeth
in part (8a) and a small gear (9) rotatably driven by a drive source in relation of
engaging with the large gear, so that the non-tooth portion of the large gear is provided
at the position thereof where the large gear disengages from the small gear just after
the closing means completes its energy conservation, whereby the small gear, after
completion of energy conservation of the closing means is completed, runs idle in
the non-tooth portion and the drive source for the small gear is free from pulsation
of a load and the drive source smoothly rotates, resulting in that a small drive source
is enough for use and the large gear and small gear are not subjected to an overload,
thereby the present invention can provide an operating mechanism of a large current
and a large capacity. |