CN203013651U

CN203013651U - A tripping device of a circuit breaker

Info

Publication number: CN203013651U
Application number: CN2012206467413U
Authority: CN
Inventors: 宋修扬
Original assignee: LS Industrial Systems Co Ltd
Current assignee: LS Electric Co Ltd
Priority date: 2011-11-29
Filing date: 2012-11-29
Publication date: 2013-06-19
Anticipated expiration: 2022-11-29
Also published as: KR200466276Y1

Abstract

The utility model relates to a tripping device of a circuit breaker. In the tripping device, multiple spring fixing portions are formed on an armature or an armature support where instant springs are suspended and fixed. Therefore, the rated current of the breaker can be changed by one spring. As a result, not only is the assembling processes of the circuit breaker are simplified, but also reduced breaker performance and reliability which arise from fault assembly of the instant springs can be prevented in advance.

Description

The trip gear of circuit-breaker

Technical field

The utility model relates to the trip gear of circuit-breaker, relates in particular to the trip gear of the circuit-breaker with mechanical tripping structure.

Background technology

Generally speaking; circuit-breaker or title wiring are the following low voltage controller switching equipments of a kind of hundreds of volts (volt) with circuit breaker; be installed on and build thing, factory, boats and ships etc.; when on circuit by such as the improper electric current of short circuit current or overcurrent the time; this situation and the automatic supply of electric power circuit that cuts off from mains side to load-side detected, thereby have protection load equipment and circuit and personnel's defencive function and the switching function of circuit.

With regard to the sort circuit circuit breaker, as mentioned above, when the trip gear that this is detected during by improper electric current on circuit as shown in Figure 1.

That is, trip gear in the past comprises: housing 1, and it consists of shell; Iron core (core) 2, it is electrically connected on circuit, is magnetized along with the electrical current on circuit; Armature (armature) 3, itself and described iron core 2 configure in opposite directions, can be incorporated into rotationally described housing 1, when the magnetic pull of described iron core 2 is large, rotate by means of magnetic pull.

And the side at described armature 3 is equipped with armature end flange 4, between described armature 3 and armature end flange 4, possesses instantaneous spring (instant spring) 5, its provide make described armature 3 to the elastic force that rotates because of the opposite direction of the rotation of magnetic pull.On described armature 3 and armature end flange 4, be formed with respectively spring projection 3a, a 4a for fixing instantaneous spring 5.

But, be formed with spring projection 3a, a 4a on described armature 3 and armature end flange 4 due to trip gear in the past as above, so work as the rated current of circuit-breaker not simultaneously, must change the specification of instantaneous spring, carry out instantaneous trip, therefore, not only assembling procedure is difficult, and when assembling, the instantaneous spring 5 of assembling different size, the problem that existence reduces the performance and reliability of the circuit-breaker that requires moment dropout action.

The utility model content

The purpose of this utility model is to provide a kind of trip gear of circuit-breaker, make it possible to when the assembling of instantaneous spring, use the instantaneous spring of same size, not only can simplify assembling procedure, and can prevent the instantaneous spring that does not meet breaker rated current because of mistake assembling and reduce the circuit breaker performance and reliability in possible trouble.

The trip gear of circuit-breaker of the present utility model is characterised in that, comprising: housing; Iron core, it is electrically connected in the power circuit between power supply and load, is magnetized when on described power circuit, improper large electric current occuring; Armature, it can be incorporated into described housing rotationally, when described iron core is magnetized, rotates by means of the gravitation of this iron core; Armature end flange, it is fixedly installed in described housing; And instantaneous spring, it connects described armature and described armature end flange, to the described armature of rightabout resiliency supported of iron core; And, on described armature or armature end flange, be formed be used to the variable a plurality of spring fixed parts of the elastic force that makes described instantaneous spring.

As preferably, on described armature, be formed for the fixedly protuberance of fixing described instantaneous spring; Described a plurality of spring fixed part forms along the length direction of described fixedly protuberance with leaving.

As preferably, on described armature end flange, be formed for the fixedly protuberance of fixing described instantaneous spring; Described a plurality of spring fixed part forms along the length direction of described fixedly protuberance with leaving.

Trip gear according to circuit-breaker of the present utility model, by hanging and fixing on the armature or armature end flange of instantaneous spring, form by stages a plurality of spring fixing points, thereby utilize a spring just can make the rated current of circuit breaker variable, therefore, not only can simplify the assembling procedure of circuit-breaker, and the mistake assembling that can prevent because of instantaneous spring causes circuit breaker performance and reliability lowly in possible trouble.

Description of drawings

Fig. 1 is for the stereogram of the major part of the trip gear display circuit circuit breaker of circuit-breaker in the past is described.

Fig. 2 is the stereogram for the major part of the trip gear display circuit circuit breaker that circuit-breaker of the present utility model is described.

Fig. 3 is the stereogram that shows the armature in trip gear shown in Figure 2.

Fig. 4 and Fig. 5 are the stereograms that shows respectively the different installation examples of instantaneous spring in the trip gear of circuit-breaker of the present utility model.

Embodiment

By the following explanation of reference accompanying drawing to the utility model preferred embodiment, will more clearly understand the purpose of this utility model and formation of the present utility model and the action effect thereof of reaching it.

Fig. 2 is the stereogram for the major part of the trip gear display circuit circuit breaker that circuit-breaker of the present utility model is described, Fig. 3 is the stereogram that shows the armature in trip gear shown in Figure 2.

As shown in Figures 2 and 3, the trip gear of the circuit-breaker of the present embodiment comprises the instantaneous spring 40 of housing 10, iron core (core) 20, armature (armature) 30 and the described armature of resiliency supported.

Described iron core 20 is magnetized and produces magnetic pull when the improper large electric current of the upper generation of described power circuit (hereinafter to be referred as circuit) as a kind of electromagnet that is electrically connected in the power circuit between power supply and load.Certainly, when flowing through normal current on described circuit, although iron core 20 also is with magnetic, when normal current passed through, the magnetic pull that iron core 20 produces did not reach the degree of attraction (it is rotated) armature 30.When circuit-breaker be 3 cross streams use 3 polar circuit circuit breaker the time, each phase of iron core 20, that is, one of R phase, S phase, the mutually every phase of T dispose 3 armatures 30 altogether.

Described armature 30 is as being substantially tabular member, and pivotable is incorporated into described housing 10, when iron core 20 is magnetized, is attracted and can rotate by iron core 20.And, in the upper end, both sides of described armature 30, be formed with respectively fixedly protuberance 31 of spring, at the fixing protuberance 31 of described spring, be formed with respectively mount hole 311, so that the articulated end of instantaneous spring 40 described later inserts and fixes.And, fixedly between protuberance 31, be formed with dropout effect protuberance 32 at a plurality of springs.

Described instantaneous spring 40 is made of extension spring, is formed with articulated end at two ends, is fixed in armature 30 and armature end flange 50 in order to hang.That is, described instantaneous spring 40 connects described armature 30 and armature end flange 50.

Described armature end flange 50 secure bond are formed with fixedly protuberance 51 of spring in described housing 10 in the upper end, both sides, in order to articulate a side articulated end of fixing described instantaneous spring 40.

The trip gear of the circuit-breaker of the utility model embodiment as above is by following work.

Namely, in circuit between mains side and load-side, if the abnormal current such as overcurrent, short circuit current occurs, the iron core 20 that is electrically connected in described circuit is magnetized and produces gravitation, and the armature 30 of installing in opposite directions with described iron core 20 rotates when being pulled to iron core 20 sides.

So, unshowned cross bar (crossbar) or release lever (trip bar) during the dropout effect protuberance 32 that extends on the top of described armature 30 promotes switching mechanisms and make it rotation.So unshowned wire nail (nail), latch hook (latch holder) discharge latch (latch) in linkage rotation.Due to the release of described latch, the elastic energy effect of dropout spring (trip spring) savings pull unshowned axle (shaft) to be rotated, thereby the moving contact that is supported in described axle separates from fixed contact, and circuit is cut off (dropout).

Then, after described abnormal current is eliminated, if be converted to normal current, so, armature 30 by means of described instantaneous spring 40 to rotating away from the direction of iron core 20, thereby set back.

Wherein, if determined the elastic force of described instantaneous spring 40, the rated current that can regulate circuit breaker.That is, for making for high voltage operation, the elastic force of instantaneous spring 40 should be improved, on the contrary, for making for low voltage operating, the elastic force of instantaneous spring 40 should be reduced.

In the situation that in the past, the fixing point at fixing instantaneous spring 40 two ends only disposes respectively one, therefore, for regulating the rated current of circuit breaker, need to be altered to different size to the elastic force of described instantaneous spring 40.But the present embodiment is the fixing points that form a plurality of fixing described instantaneous both ends of the spring, thereby by utilizing an instantaneous spring change elastic force, thereby the rated current that can regulate circuit breaker.

For this reason, the armature 30 of the present embodiment along the fixing length direction of protuberance 31 of spring, is formed with a plurality of fixing hole 311(spring fixed parts as shown in Figure 3).Described a plurality of fixing hole 311 forms with leaving, in order to make the variable spaced of described fixing hole 311 and the fixing point of described armature end flange 50, makes the elastic force of described instantaneous spring 40 can be variable.As another example, at the fixedly protuberance 51 of described armature end flange 50, also can form a plurality of spring fixed parts.Described a plurality of spring fixed part can configure along the protrusion direction of described fixedly protuberance 51 with leaving.Perhaps, also can form respectively a plurality of spring fixed parts on armature and armature end flange.

The trip gear of the present embodiment as above is when improving rated current, as shown in Figure 4, spring fixedly the least significant end of protuberance 31 articulate the articulated end of fixing instantaneous spring 40, on the contrary, when reducing rated current, as shown in Figure 5, fixedly stage casing or the lower end of protuberance 31 articulate the articulated end of fixing instantaneous spring 40 at spring, thereby utilize an instantaneous spring 40, just can regulate elastic force, the rated current of plus-minus circuit breaker.

Thus, utilize a spring just can make the rated current of circuit breaker variable, therefore, not only can simplify the assembling procedure of circuit-breaker, and the mistake assembling that can prevent because of instantaneous spring reduces the circuit breaker performance and reliability in possible trouble.

In this basic fundamental thought category of the present utility model, the person of ordinary skill in the field can carry out other various deformation, and interest field of the present utility model should make an explanation based on utility model right claim.

Claims

1. the trip gear of a circuit-breaker is characterized in that comprising:

Housing;

Iron core, it is electrically connected in the power circuit between power supply and load, is magnetized when on described power circuit, improper large electric current occuring;

Armature, it can be incorporated into described housing rotationally, when described iron core is magnetized, rotates by means of the gravitation of this iron core;

Armature end flange, it is fixedly installed in described housing; And

Instantaneous spring, it connects described armature and described armature end flange, to the described armature of rightabout resiliency supported of iron core; And,

On described armature or armature end flange, be formed be used to the variable a plurality of spring fixed parts of the elastic force that makes described instantaneous spring.

2. the trip gear of circuit-breaker according to claim 1 is characterized in that:

On described armature, be formed for the fixedly protuberance of fixing described instantaneous spring;

Described a plurality of spring fixed part forms along the length direction of described fixedly protuberance with leaving.

3. the trip gear of circuit-breaker according to claim 1 is characterized in that:

On described armature end flange, be formed for the fixedly protuberance of fixing described instantaneous spring;