CN104871282B

CN104871282B - Circuit-breaker

Info

Publication number: CN104871282B
Application number: CN201280077687.8A
Authority: CN
Inventors: 仁科健; 仁科健一; 泷川雄介
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2012-12-12
Filing date: 2012-12-12
Publication date: 2017-06-09
Anticipated expiration: 2032-12-12
Also published as: CN104871282A; JP5840307B2; WO2014091573A1; JPWO2014091573A1

Abstract

A kind of circuit-breaker, the circuit-breaker has assist shroud, and the assist shroud links via the hinge part of the ora terminalis of the cavity portion for being arranged on the auxiliary equipment for housing disconnecting mechanism with main cover, in the circuit-breaker, the hinge part is made up of components described below：Multiple bearing portions, they are set from the main cover protrusion, internally with the elongated hole extended on the short side direction of breaker；Notch, it is recessed across predetermined distance and is arranged on the ora terminalis of the assist shroud, when with the bearing portion combination, for inserting respective bearing portion；Pin, its protrusion is arranged in the part in the notch, is extended in the same direction with the elongated hole；And thinner wall section, it is formed in a part for the assist shroud.

Description

Circuit-breaker

Technical field

The present invention relates to a kind of circuit-breaker, the circuit-breaker has to alarm contact, auxiliary switch, test dress Put, the cavity portion that the various auxiliary equipments such as tripgear are housed, more particularly to a kind of improvement of hinge part, the hinge part The assist shroud that above-mentioned cavity portion will be covered pivotally links with main cover.

Background technology

The pedestal and main cover that existing circuit-breaker is formed by synthetic resin material are constituted, and work is formed with main cover It is the cavity portion of the incorporating section of the auxiliary equipments such as alarm contact or auxiliary switch.Also, exist in a manual manner to receiving Handle that the disconnecting mechanism being contained in the Shell of circuit breaker is opened and closed and for making the handle be protruding to outside above-mentioned housing Handle set, with the assist shroud that can be such as opened and closed when above-mentioned auxiliary equipment is attached into cavity portion, above-mentioned assist shroud passes through The bearing portion that is formed on main cover and the pin that is formed in assist shroud and form the hinge structure that can be rotated.In addition, closing In the case of closing assist shroud, by fixing screws, formed and the main construction for covering and engaging (with reference to patent document 1).

Patent document 1：Japanese Unexamined Patent Publication 6-124638

The content of the invention

In above-mentioned existing circuit-breaker, if flowing this high current of short circuit current, as is known, meeting Trip operation is carried out, electric arc is produced between contact.If circuit breaker internal is full of by the gas that the electric arc is produced, by electric arc The pressure higher that gas is produced also is transmitted to the cavity portion of auxiliary equipment storage simultaneously, therefore, assist shroud can be damaged sometimes, Auxiliary equipment is deviate to the outside of circuit-breaker.

That is, in existing construction, for the hinge structure for linking main cover and assist shroud, by the auxiliary of circuit-breaker Cover is helped to be arranged on when on main cover, the direction of insertion of pin turns into side or handle (center) direction, to cause not interfere And be easily accessible, therefore, in the absence of making to be died down from handle towards the pressure in sideways direction, on the direction opposite with the pressure Make the structure of assist shroud pretension, therefore, when assist shroud turns into the compression body of arcing gas, the pin meeting of hinge structure sometimes Come off from bearing.Accordingly, it would be desirable to increase the quantity of mounting screw or make the thickening this reply arcing gas of wall of cover material Pressure countermeasure.

The present invention proposes that its linking part to main cover and assist shroud is hinge structure in order to solve the above problems a little Make and improved so that in the circuit-breaker of the cavity of auxiliary equipment covering will be accommodated with by assist shroud, assist shroud Assembleability is excellent, also, in the case where this high current of short circuit current is flowed, even if by the electric arc produced between contact The internal pressure higher for causing, assist shroud also will not breakage disperse.

Circuit-breaker involved in the present invention has Shell of circuit breaker, and it is by pedestal and fixed main cover on the base Constitute, disconnecting mechanism is accommodated in inside；Cavity portion, its surface with the pedestal opposite side for being formed in the main cover, House the auxiliary equipment of the disconnecting mechanism；And assist shroud, it is via the hinge part and institute for being arranged on the cavity portion ora terminalis Main cover connection is stated, the cavity portion is covered, the circuit-breaker is characterised by that the hinge part is made up of components described below：It is many Individual bearing portion, they each other across predetermined distance and from it is described it is main cover protrusion set, internally with the handle from breaker to The elongated hole that side surface direction extends；Notch, its across predetermined distance and the assist shroud ora terminalis be recessed set, with it is described During bearing portion combination, for inserting respective bearing portion；Pin, its protrusion is arranged in the part in the notch, with The elongated hole extends in the same direction；And thinner wall section, it is formed in a part for the assist shroud.

The effect of invention

According to the present invention, there is provided a kind of circuit-breaker, in the circuit-breaker, to main cover bearing portion insert it is auxiliary Help the pin shaped of cover to turn into extend towards side surface direction from the handle (center) of breaker, therefore, assist shroud becomes to be difficult to slide Extract, even if being subject to the arcing gas produced between contact to cause in the case where this high current of side short circuit current is flowed Pressure higher, without make cover material be formed as heavy wall or increase assist shroud fixing screws quantity, Neng Goufang The only breakage of assist shroud is dispersed, and improves break arc gas resistance to pressure.

Brief description of the drawings

Fig. 1 is the outward appearance oblique view for representing the circuit-breaker involved by one embodiment of the present of invention.

Fig. 2 is represent the state after the left pole assist shroud of one of the assist shroud of circuit-breaker of Fig. 1 is opened outer See oblique view.

Fig. 3 (a) is the front view of left pole assist shroud, and (b) is the figure seen from the arrow D directions of (a) figure.

Fig. 4 is the oblique view of the left pole assist shroud.

Fig. 5 is the profile of the hinge structure for representing the circuit-breaker involved by one embodiment of the present of invention.

Fig. 6 is the front view of the circuit-breaker involved by one embodiment of the present of invention.

Fig. 7 is the front view of the circuit-breaker for representing another embodiment of the present invention.

Fig. 8 is the front view of the circuit-breaker for representing another embodiment of the present invention.

Specific embodiment

Implementation method 1.

Using shown Fig. 1~Fig. 6, one embodiment of the present of invention is illustrated.

First, using Fig. 1, Fig. 2, the circuit-breaker as object of the invention is illustrated.In figure, circuit breaks Road device 100 is made up of components described below：Shell of circuit breaker 1, its by the pedestal 1a that is formed using synthetic resin material and can from It is made up of the main cover 1b being removably fixed on pedestal 1a, disconnecting mechanism (not shown) is accommodated in inside it；Handle 3, its Formed by synthetic resin identically with above-mentioned Shell of circuit breaker 1, for being operated to disconnecting mechanism from outside；Handle set 4, its In order that the handle 3 is protruding to the outside of Shell of circuit breaker 1 and is arranged on main cover 1b；Right pole assist shroud 2a and Zuo Jiyong Assist shroud 2b, they are rotationally linked by hinge part 5 with main cover 1b.

In addition, on the surface of main cover 1b, in the both sides of the handle set 4 of the substantially central portion positioned at circuit-breaker, difference The cavity portion 6 for housing auxiliary equipment is formed with, alarm contact (not shown), auxiliary switch etc. are received in the cavity portion 6 Auxiliary equipment.The right pole assist shroud 2a being parallelly disposed with respect to one another on the circuit direction (long side direction of Fig. 1) of breaker body And left pole assist shroud 2b is formed by synthetic resin respectively, with the side surface direction of breaker body (short side direction of Fig. 1) The hinge part 5 of upper formation is fulcrum, and internal auxiliary equipment is opened and closed with cavity portion 6.

As shown in Figure 3, Figure 4, for two assist shrouds 2a, 2b (only showing left pole assist shroud 2b in figure), at them End edge portion be recessed across predetermined distance each other otch 10a, 10b of setting are set, have in the inner surface of the otch 10a, 10b Pin 7a, 7b of side surface direction (short side direction) protrusion of oriented breaker body, also, cutting in above-mentioned assist shroud 2a, 2b Thinner wall section 8a, 8b is formed with a mouth 10, part of 10b.In addition, in the end edge portion shape in handle (center) direction of assist shroud 2b Into there is thinner wall section 8c.Above-mentioned thinner wall section 8a, 8b is set to will be formed in of otch 10a, the 10b in two assist shrouds 2a, 2b Part covers, and with the thickness for such as being bent upward along with the insertion of the lug boss of main cover 1b described later.Similarly, Thinner wall section 8c is again formed as having what is bent upward along with right side assist shroud 2a in the insertion of the lug boss of main cover 1b Thickness.In addition, in above-mentioned assist shroud 2a, 2b, as observed by from Fig. 4, being formed in when closing assist shroud and handle set 4 Side abut internal face 9.Assist shroud 2a, 2b detachably can be arranged on main cover 1b by hinge structure 5.

By Fig. 5, two details of the installation carried out using hinge structure 5 of assist shroud 2a, 2b are illustrated.Fig. 5 (a), (b) Partly represent along the c-c line sections of Fig. 1, Fig. 5 (a) represents that main cover 1b's and assist shroud 2b is initially inserted into state, Fig. 5 (b) tables Showing makes assist shroud 2b be slided from the state to A directions (left direction of figure), the pin 7a, 7b be completely fitted to bearing portion 11a, State in elongated hole 4a, 4b of 11b.That is, in the ora terminalis of the load-side end side of main cover 1b, in the way of across predetermined distance d Protrusion is set just like bearing portion 11a, the 11b shown in Fig. 5 (a), and the bearing portion 11a, 11b internally have towards breaker body Side surface direction (short side direction) elongated hole 4a, 4b, elongated hole 4a, 4b be arranged opposite in same axis with above-mentioned pin 7a, 7b.

For being fitted together to method, when by assist shroud 2b with bearing portion 11a, 11b combination of main cover 1b, first, by above-mentioned axle In the absence of the position of pin 7a, 7b in notch 10a, 10b of the above-mentioned assist shroud 2b of bearing portion 11a, 11b insertion, make to be formed in this Thinner wall section 8a, 8b of position, 8c are abutted and bent with the top surface of bearing portion 11a, 11b and assist shroud 2a.By the bending, pin 7a, 7b are relative with the position of elongated hole 4a, 4b for nail, in this condition, if making transverse direction, arrow A sides of the assist shroud 2b to breaker To slip, then pin 7a, 7b is embedded in elongated hole 4a, 4b, and thinner wall section 8 is reduced from case of bending, shown in such as Fig. 5 (b), by embedding Enter and constitute hinge structure 5.

Assist shroud 2a, 2b is not pulled down generally, but, in the case where being pulled down, by make thinner wall section 8a, 8b, 8c bend and on the top surface of bearing portion 11a, 11b and assist shroud 2a slide, and make assist shroud 2a, 2b to arrow A Opposite direction is slided, so as to be pulled down.The hinge structure 5 for constituting in the manner as described above can be with pin 7a, 7b in length The scope that can be moved in hole 4a, 4b accordingly make assist shroud 2a, 2b slide, pin 7a, 7b be completely embedded into elongated hole 4a, In the state of in 4b, above-mentioned assist shroud can be made to rotate and close cavity portion 6, then, be able to will be aided in by fixing screws 12 Cover 2a, 2b are fixed.

Implementation method 2.

In above-mentioned example, it is configured to as shown in the plan view of figure 6, by assist shroud 2a, 2b of symmetrical shape The auxiliary equipment cavity portion 6 at the two poles of the earth is covered, but, structure as described below also has effect of the invention.Fig. 7 represents real The front view of the circuit-breaker involved by mode 2 is applied, in this example embodiment, in the cavity 6 of the auxiliary equipment in the absence of left pole In the case of, be formed as assist shroud 2b and main cover 1b and be integrally formed, it is empty only to cover right pole auxiliary equipment by assist shroud 2a The structure in chamber portion 6.

Implementation method 3.

In addition, Fig. 8 represents the front view of the circuit-breaker involved by implementation method 3, with the structure of Fig. 7 or so conversely, The structure of the auxiliary equipment cavity that left pole is covered by assist shroud 2b, other structures and effect and implementation method 1 with And 2 is identical, therefore omit the description.

Above-mentioned implementation method is a part of the invention, additionally, it is contemplated that various modifications example within the scope of the invention. For example, in the hinge structure 5 of implementation method 1, listing following examples, i.e. from main cover 1b each other across predetermined distance and The inside for protruding bearing portion 11a, 11b for setting sets elongated hole 4a, 4b, in a part of notch 10a, 10b of assist shroud 2b In be provided with pin 7a, 7b relative with above-mentioned elongated hole, but naturally it is also possible to be to exchange their relation, i.e. in main cover Pin 7a, 7b are set on 1b, notch 10a, 10b are set on assist shroud 2b, it is also possible to obtain identical hinge structure.

In the circuit-breaker that implementation method as described above is constituted, when this high current of flowing short circuit current, Separated due to repelling each other between contact (not shown) and electric arc is produced between contact.The electric arc makes the gas of surrounding drastically Expansion, forms arcing gas and is full of circuit breaker internal.A part for the arcing gas sprays from tap is (not shown), but It is, it is impossible to spray completely to transmit pressure to assist shroud 2a, 2b with cavity 6 via auxiliary equipment, is formed assist shroud 2a, 2b The active force that pin 7 is boosted.Due to assist shroud 2 being forced by hinge structure 5 and fixing screws 12 be fixed on main cover 1b On, therefore, the torque of the active force for boosting changes and forms the pressure in the direction of the arrow B to Fig. 6.Arrow B is court To the pressure in breaker inner face direction.

But, in the state of the closing of assist shroud 2, the internal face 9 of assist shroud 2 passes through larger with the handle set 4 of main cover 1b Area abut, even if being applied with the pressure in arrow B directions, handle set 4 also can keep assist shroud 2 by larger area. Therefore, flow this high current of short circuit current in the case of, even if by by between contact produce electric arc cause compared with Pressure high, without the quantity of the fixing screws 12 of thickening or increase assist shroud 2 by the wall of cover material, is prevented from The destruction of assist shroud 2, disperse.Further, it is possible to obtain the rotation construction of assist shroud, the rotation of the assist shroud is configured to be applied to The pressure caused by arcing gas rises the breaking capacity circuit-breaker higher for uprising.

In addition, as shown in Fig. 2 assist shroud 2a, 2b opening in the state of, assist shroud 2a, 2b not with the hand of main cover 1b The internal face of handle seat 4 is abutted, and can be bent by making thinner wall section 8, so that the pin 7 of assist shroud 2a, 2b is free in the horizontal Slide, obstacle can not be produced in removal and installation, easily assembled.

The explanation of label

1 Shell of circuit breaker, 1a pedestals, the main covers of 1b,

2a assist shrouds (right pole side), 2b assist shrouds (left pole side),

3 handles, 4 handle sets, the hinge structure of 4a, 4b elongated hole 5,

6 auxiliary equipment cavity portions, 7 pins, 8 thinner wall sections,

9 assist shroud internal faces, 10,10a, 10b notch, 11 bearing portions,

12 fixing screws, 100 circuit-breakers.

Claims

1. a kind of circuit-breaker, it has：Shell of circuit breaker, it is made up of pedestal and fixed main cover on the base, will Disconnecting mechanism is accommodated in inside；Cavity portion, its surface with the pedestal opposite side for being formed in the main cover houses described The auxiliary equipment of disconnecting mechanism；And assist shroud, its via the ora terminalis for being arranged on the cavity portion hinge part and the main cover Link, and cover the cavity portion,

The circuit-breaker is characterised by,

The hinge part is made up of components described below：

Multiple bearing portions, they are set across predetermined distance from the main cover protrusion each other；

Notch, across predetermined distance, the ora terminalis depression in the assist shroud is set for it, for inserting the bearing portion；

Pin, its protrusion is arranged on the notch, is extended from the handle of breaker to side surface direction；

Elongated hole, it is arranged on the bearing portion, is formed in same axis with the pin, and by the side to the assist shroud Face direction move and it is chimeric with the pin；And

Thinner wall section, it extends from the assist shroud to the bearing portion insertion portion of the notch.

2. circuit-breaker according to claim 1, it is characterised in that

When bearing portion is inserted to the assist shroud, the thinner wall section is made to the assist shroud by using the bearing portion top surface Outer lateral bend such that it is able to make the pin chimeric with elongated hole.

3. circuit-breaker according to claim 1 and 2, it is characterised in that

Some of the assist shroud by right pole assist shroud and left pole assist shroud or only in them is constituted.

4. circuit-breaker according to claim 3, it is characterised in that

In the state of closing the assist shroud and covering the auxiliary equipment of main cover with cavity, cover the handle set of handle with it is auxiliary The internal face of cover portion is helped integrally to be abutted by the internal face.