CN2550896Y

CN2550896Y - Electromagnetic actuating mechanism for breaker

Info

Publication number: CN2550896Y
Application number: CN 02221023
Authority: CN
Inventors: 管瑞良; 毛振风
Original assignee: CHANGSHU SWITCH FACTORY
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2002-06-01
Filing date: 2002-06-01
Publication date: 2003-05-14
Anticipated expiration: 2012-06-01

Abstract

The utility model relates to an electromagnet executive device for a circuit breaker, comprising an outer frame 8, coils 7, a tappet 3, an iron core 1, magnetic poles 2, and a spring 4, which is characterized in comprising with a magnetic pole 9; a copper bush 5 is fixedly arranged at the bottom part of the magnetic pole 9; the D face of the copper bush 5 is matched with the C face of the iron core 1; the upper part of the iron core 1 is sliding matched with the magnetic pole 9, so as to limit the iron core 1; one end of the tappet 3 is perforating the iron core 1 and the magnetic pole 9, the other end is perforating the magnetic pole 2, and a flange 6 is arranged at the middle part; the B face of the flange 6 is matched with the A face of the iron core 1, so as to limit the tappet 3; the two ends of the spring 4 are respectively supported on the flange 6 and the magnetic pole 2. The utility model has the advantages of having no position change of the iron core 1, and ensuring the stable and enough hitting power of the tappet 3 to the -- axle shaft of the circuit breaker trip device.

Description

The electromagnetic actuator of circuit breaker

The utility model relates to a kind of electromagnetic actuator of circuit breaker, is the improvement to the electromagnetic actuator of existing circuit breaker.

The electromagnetic actuator of circuit breaker is made up of housing 8, coil 7, iron core 1, magnetic pole 2, spring 4, push rod 3 and an iron core fixed mechanism, shown in figure one, after coil 7 energisings, iron core 1 be subjected to electromagnetic force effect and to magnetic pole 2 adhesives, thereby driving push rod 3 moves downward, make push rod 3 outputs one operating physical force, to drive the associated components action, as the dropout semiaxis of circuit breaker tripping device.After coil 7 dead electricity, iron core 1 is by the restoring force of spring 4 and spacing and return back to original state by nut 5,6.The iron core 1 of this mechanism fixedly realizes by spiral marking connection with push rod 3, and spacing be again to touch mutually with the end face of magnetic pole 2 by nut 5,6 to finish.So just expose following problem in actual use: when iron core 1 moves back and forth, push rod 3, nut 5,6 just are subjected to the alternation fluctuating circulating stress, thereby cause push rod 3, nut 5,6 to occur loosening, loosening then can produce the gap, the existence in gap can cause the shift in position of iron core 1, initial magnetic is opened apart from increasing, cause the suction-combining force to weaken, because of making push rod 3 power outputs, weakening of the suction-combining force reduce, when for example driving the action of dropout semiaxis, the semiaxis of then threading off is failure to actuate owing to the hitting power that is subjected to is too small, directly threatens the safe action of circuit breaker.

The purpose of this utility model is to provide a kind of iron core position can not occur changing, guaranteeing that push rod has the electromagnetic actuator of the circuit breaker of stable and the enough hitting powers of tool to the semiaxis of circuit breaker tripping device.

The purpose of this utility model reaches like this, a kind of electromagnetic actuator of circuit breaker, form by housing 8, coil 7, push rod 3, iron core 1, magnetic pole 2, spring 4, be characterized in that it also has a magnetic pole 9, the bottom of magnetic pole 9 has been installed with copper sheathing 5, the D face of copper sheathing 5 and the C face of iron core 1 match, and the top of iron core 1 and 9 sliding joining of magnetic pole, have joined iron core 1 spacing by this cunning; One of described push rod 3 end passed through iron core 1, magnetic pole 9, and end passed through magnetic pole 2 in addition, and the middle part has a flange 6, and the B face of flange 6 and the A face of iron core 1 match, and have cooperated push rod 3 spacing by this; Spring 4 two ends are supported on respectively on flange 6 and the magnetic pole 2.

The utility model is owing to adopted said structure, embodied self spacing fixed form of utilizing iron core 1, push rod 3, magnetic pole 2,9, the spiral shell that has changed in the past push rod 3 and iron core 1 concerns and admittedly by the position limiting structure of nut to push rod 3, change can not appear in the position with iron core 1, and the semiaxis of guaranteeing 3 pairs of circuit breaker tripping devices of push rod has the advantage of stable and enough hitting powers.

Below in conjunction with accompanying drawing the utility model is further described below.

Fig. 1 is the electromagnetic actuator figure of the circuit breaker in the prior art.

Fig. 2 is the utility model assembly structure figure.

Fig. 3 is the cutaway view of the utility model Fig. 2.

The utility model is assembled like this, and coil 7 places in the housing 8, and magnetic pole 2,9 is fixed on the upper and lower position of housing 8 respectively accordingly and makes the main part of magnetic pole 2,9 be positioned at the cavity volume 12 of coil 7.The jogger hole 10 that magnetic pole 2,9 central authorities respectively have cavity volume 11 and passed through for push rod 3, ccontaining ends that are sheathed on the spring 4 on the push rod 3 in the cavity volume 11 of magnetic pole 2, and by the bottom of this cavity volume 11 spring 4 is supported, the top of spring 4 is then by flange 6 supportings; The top of ccontaining iron core 1 in the cavity volume 11 of magnetic pole 9, this cavity volume 11 constitutes sliding joining with the top of iron core 1.Copper sheathing 5 is fixed on the bottom of magnetic pole 9, and its D face matches with the C face at iron core 1 middle part.The bottom of iron core 1 can supply the flange 6 of push rod 3 to protrude into by the form of offering such as recessed edge, and guarantees reasonable and good the cooperating of B face realization of A face with the flange 6 of this recessed edge.Like this, both fit iron core 1 and push rod 3 by A face and B face respectively and are aided with the elastic force of spring 4 or electromagnetic attraction and closely are fixed together, and the sports limiting that iron core 1 makes progress then embodies with the contacting of D face of copper sheathing 5 by the C face of iron core 1.

After coil 7 energisings, iron core 1 overcomes spring 4 under the effect of electromagnetic force spring force moves to magnetic pole 2 directions, and drive push rod 3 moves together, contact with magnetic pole 2 until iron core 1, at this moment the push rod 3 that moments stretch out in the jogger hole 11 of magnetic pole 2 hits the dropout semiaxis of circuit breaker tripping devices, reaches the purpose of operating breaker trip gear; Otherwise when undertension or dead electricity, iron core 1, push rod 3 to copper sheathing 5 directions motions, contact with copper sheathing 5 and spacing until iron core 1 under the restoring force effect of spring 4.

Claims

1, a kind of electromagnetic actuator of circuit breaker, form by housing (8), coil (7), push rod (3), iron core (1), magnetic pole (2), spring (4), it is characterized in that it also has a magnetic pole (9), the bottom of magnetic pole (9) has been installed with copper sheathing (5), the C face of the D face of copper sheathing (5) and iron core (1) matches, the top of iron core (1) and magnetic pole (9) are sliding joins, and has joined iron core (1) spacing by this cunning; One of described push rod (3) end passed through iron core (1), magnetic pole (9), and end passed through magnetic pole (2) in addition, and the middle part has a flange (6), and the A face of the B face of flange (6) and iron core (1) matches, and has cooperated push rod (3) spacing by this; Spring (4) two ends are supported on respectively on flange (6) and the magnetic pole (2).