Operating mechanism of circuit breaker and its shaft connection system
A shaft connection and operating mechanism technology, which is applied in the protection switch operation/release mechanism, contact drive mechanism, etc., can solve the problems of increasing the tripping force, increasing the pressure of the four-link contact, affecting the strength and service life of the operating mechanism, etc. , to achieve the effect of reducing the tripping force of the mechanism and improving the strength and service life of the mechanism
Active Publication Date: 2012-07-25
SEARI ELECTRIC TECH +2
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Problems solved by technology
However, if the mechanism is used as a direct-acting contact, the contact pressure on the four-linkage bar will be greatly increased, thereby greatly increasing the tripping force and affecting the strength and service life of the operating mechanism.
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[0023] The invention provides a rotating shaft connection system in a circuit breaker operating mechanism. The rotating shaft connecting system connects the main shaft of the circuit breaker, the cantilever on the main shaft and the four-bar linkage mechanism of the circuit breaker. The rotating shaft connection system includes:
[0024] Connecting pin, connected to the cantilever on the main shaft;
[0025] The connecting roller is set on the connecting pin;
[0026] shaft;
[0027] The cam is connected to the rotating shaft and rotates around the rotating shaft;
[0028] Wherein, one side of the cam is connected with the four-bar linkage mechanism, and the other side of the cam is in contact with the connecting roller.
[0029] Wherein, the side of the cam in contact with the connecting roller is arc-shaped, and when the cam rotates around the shaft, only one point on the cam is always in contact with the connecting roller to form a tangent surface. The tangential surface...
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The invention discloses a rotating shaft connection system of an operating mechanism of a circuit breaker, which is connected with a main shaft of the circuit breaker, a cantilever positioned on the main shaft and a four-bar mechanism of the circuit breaker. The rotating shaft connection system comprises a connecting pin, a connecting roller, a rotating shaft and a cam, wherein the connecting pinis connected with the cantilever positioned on the main shaft; the connecting roller is sleeved with the connecting pin; the cam is connected with the rotating shaft and rotates around the rotating shaft; one side of the cam is connected with the four-bar mechanism, and the other side of the same contacts with the connecting roller. In the invention, contact pressure is transferred to the main shaft and four bars by the cantilever of the main shaft, the main shaft bears a large part of the contact pressure, and the four bars bear a small part of the contact pressure so that the releasing force of the operating mechanism can become very small, the original very large releasing force of the operating mechanism is greatly reduced, the strength of the operating mechanism isimproved and the service life of the operating mechanism is prolonged.
Description
technical field [0001] The invention relates to the field of low-voltage electrical appliances, and more specifically, to a circuit breaker operating mechanism. Background technique [0002] In the existing circuit breaker operating mechanism, the rotary contact is directly connected to the main shaft, and then directly connected to the four-bar linkage by the cantilever of the main shaft. The four-bar linkage rotates to the closing position by the release capacity of the energy storage spring of the mechanism energy storage lever. And if this mechanism is used as a direct-acting contact, the contact pressure on the four-linkage bar is greatly increased, thereby greatly increasing the tripping force and affecting the strength and service life of the operating mechanism. Contents of the invention [0003] The invention aims to provide a device capable of effectively reducing the impact of tripping force, so as to improve the strength and service life of the operating mecha...
Claims
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IPC IPC(8): H01H71/10H01H3/42H01H3/46
Inventor 陈正馨万里浩刘凤琨冯璟宋涛
Owner SEARI ELECTRIC TECH