CN202957208U

CN202957208U - Breaker

Info

Publication number: CN202957208U
Application number: CN 201220614869
Authority: CN
Inventors: 范磊磊; 赵峰; 徐家贺; 渠涛
Original assignee: Siemens AG
Current assignee: Siemens AG
Priority date: 2012-11-20
Filing date: 2012-11-20
Publication date: 2013-05-29
Anticipated expiration: 2022-11-20

Abstract

The utility model relates to a breaker which comprises an armature (10) and an armature support (20). The armature (10) is rotatably supported on the armature support (20). The breaker further comprises an elastic part (30), and the elastic part (30) is arranged on the armature support (20). When the armature (10) is subjected to external force effect, if the external force can overcome the elastic part (30), the armature (10) can rotate along one direction relative to the armature support (20). When the external force cannot overcome the elastic part (30), the elastic part (30) can push the armature (10) to rotate along an opposite direction relative to the armature support (20). A thermomagnetic tripping unit of the breaker provided with the armature and the armature support is simple in structure, the installing process is simple and convenient, and the cost advantage of the breaker is improved.

Description

Circuit breaker

Technical field

The utility model relates to the low-voltage electrical field, relates in particular to a kind of circuit breaker.

Background technology

For circuit breaker, especially breaker of plastic casing often has the functions such as overload protection and short-circuit protection, and the realization of this function need to be by means of the help of thermo magnetic trip release unit (TMTU, thermal and magnetic trip unit call trip unit in the following text).The structure of thermo magnetic trip release unit is often comparatively complicated, and cost is higher, and also cumbersome during assembling.

The utility model content

The purpose of this utility model provides a kind of circuit breaker with trip unit of simple structure.

The utility model provides a kind of circuit breaker, comprises an armature and an armature end flange, and described armature is supported on the described armature end flange rotationally, and described circuit breaker also comprises an elastic component, and described elastic component is arranged on the described armature end flange,

When described armature is subject to External Force Acting, if described external force can overcome described elastic component, then described armature can relatively described armature end flange along a direction rotation, after this, when described external force was not enough to overcome described elastic component, described elastic component can promote the relatively described armature end flange of described armature and rotate in opposite direction.

Can find out that the trip unit structure of this kind circuit breaker is comparatively simple, and armature can be supported on directly on the armature end flange, further simplify the number of components that relates to.

Among embodiment, described both sides of armature has respectively an armature grab therein, and described armature end flange both sides have respectively a support grab, and when described armature grab was fastened on the described support grab, described armature was supported on the described armature end flange rotationally.Adopt this structure, can with comparalive ease armature be supported on the armature end flange rotationally, reduced the difficulty of processing.

Among embodiment, circuit breaker also comprises a conductive plate therein, and described conductive plate can be entrenched togather with described armature end flange.Chimeric form can be so that realize reasonable mechanical connection between conductive plate and the armature end flange.Especially, have a projection on the described conductive plate, have an open-work on the described armature end flange, described projection can be entrenched in the described open-work.The chimeric position of can carrying out better by projection and open-work is fixing exactly.

In one embodiment, described circuit breaker also comprises a base and a conductive plate, has a stopper slot on the described base, and described conductive plate can be limited in the described base by described stopper slot.Conductive plate can directly be fixed on the base by stopper slot, and need not to increase miscellaneous part again, has reduced the quantity of required parts, so that the structure of trip unit is more simple.

In one embodiment, described circuit breaker comprises a conductive plate and a bimetal leaf, and described armature end flange is roughly the grooved spare with a spatial accommodation, and described bimetal leaf is arranged in the described spatial accommodation, one end is connected with described conductive plate, and the other end is connected with a wire.

In one embodiment, described circuit breaker also comprises a base, and described armature has an extension, has a restriction protrusion on the described base, when described elastic component promoted described armature rotation, described restriction protrusion can be by stopping that described extension is to limit being further rotated of described armature.Only need to restriction protrusion be set at base, in conjunction with armature end flange and elastic component, need not to relend and help miscellaneous part, just can limit the motion of armature, reduce further the quantity that needs the parts that use, guarantee integrally-built simplification.

In one embodiment, described armature end flange both sides have respectively a projection, and described armature end flange end has a limiting section, described elastic component is a torsion spring, described torsion spring set is located on the described projection, and an end is limited by described limiting section, and the other end then can promote described armature.By at armature end flange torsion spring being set, just can promote in a simple manner armature movement.Especially, described limiting section has spacing position, at least two places, can select different spacing positions according to the specific performance of torsion spring, thereby guarantees that torsion spring has enough thrust to promote armature and rotates.

Description of drawings

Hereinafter will also come by reference to the accompanying drawings the above-mentioned characteristic of the utility model, technical characterictic, advantage and implementation thereof are further described by description of a preferred embodiment in clear and definite understandable mode, wherein:

Fig. 1 is the partial cross sectional views of a kind of circuit breaker provided by the utility model;

Fig. 2 is the trip unit schematic diagram of using in a kind of circuit breaker provided by the utility model;

Fig. 3 is the armature schematic diagram in the trip unit shown in Figure 2;

Fig. 4 is the armature end flange schematic diagram in the trip unit shown in Figure 2;

Fig. 5 is the conductive plate schematic diagram in the trip unit shown in Figure 2;

Fig. 6 is the schematic diagram of the base in a kind of circuit breaker provided by the utility model;

Fig. 7 is the schematic diagram when trip unit shown in Figure 2 is installed;

Fig. 8 is installed to schematic diagram in the base shown in Figure 6 with trip unit shown in Figure 2;

Fig. 9 is two kinds of different states of trip unit shown in Figure 2, and wherein (a) is the schematic diagram of armature when rotating along a direction to armature end flange; (b) then be the schematic diagram that armature turns to the dropout position, circuit breaker subsequently can cutting-off of short-circuit electric current.

Label declaration:

10 armatures; 11 armature main bodys; 12 armature grabs; 120 spaces; 121 extensions; 122 kinks; 13 extensions; 20 armature end flanges; 21 projections; 22 support grabs; 221 depression positions; 23 grooves; 24 support outer walls; 234 limiting sections; 25 spatial accommodations; 26 open-works; The 20a rack body; The 20b rack side wall; The 20c rack side wall; 30 elastic components; 31 elastic component main bodys; 32 support portions; 33 operating members; 40 conductive plates; 41 wings; 43 projections; 50 bimetal leafs; 60 wires; 70 adjust screw; 80 bases; 80A, 80B, 80C base space; 81 stopper slots; 82 restriction protrusion; 90 trip units; 100 circuit breakers

Embodiment

Understand for technical characterictic, purpose and effect to utility model have more clearly, now contrast description of drawings embodiment of the present utility model, identical label represents identical part in each figure.

As shown in Figure 1, the utility model provides a kind of circuit breaker 100, wherein just comprised a kind of trip unit 90, as shown in Figure 2, comprise armature 10 and armature end flange 20 in the trip unit 90, armature 10 rotatably is supported on the armature end flange 20, particularly, the both sides of armature 10 have respectively an armature grab 12, and the both sides of armature end flange 20 have respectively a support grab 22, and armature grab 12 can be fastened on the support grab 22, thereby armature end flange 20 provides support for armature 10, avoid armature 10 to drop from armature end flange 20, if give armature 10 certain external force, armature 10 can also rotate take support grab 22 as rotating shaft.

As shown in Figure 3, armature 10(claims again armature) generally can adopt soft magnetic material, it is tabular that main body 11 roughly becomes, and also also being provided with respectively 12, two armature grabs 12 of an armature grab along the direction perpendicular to main body in main body 11 both sides can be arranged on about the axis of armature 10 symmetrically.In a kind of embodiment, armature grab 12 roughly becomes L-type, particularly, two armature grabs 12 extend again one section kink 122 along extending perpendicular to the direction of main body 11 after certain distance forms extension 121 relatively, have formed at a certain angle like this a space 120 between extension 121 and the kink 122.

As shown in Figure 4, armature end flange 20(claims again yoke) be roughly the grooved spare with a spatial accommodation 25, grooved spare comprises rack body 20a and is positioned at rack side wall 20b and the 20c of rack body 20a both sides, be provided with pair of brackets grab 22 in

rack side wall

20b and 20c bottom, with armature 10 on armature grab 12 cooperate.In a kind of embodiment, support grab 22 also roughly becomes L-type, can snap in the space 120 of armature grab 12, only, consider that armature 10 can be rotated around armature end flange 20, in support grab 22, also be provided with the depression position 221 of an arc, make things convenient for armature grab 10 to rotate to 90 when spending and the cooperation of support grab 22.As shown in Figure 2, armature grab 12 just as " embracing " on support grab 22, thereby support grab 22 provides a support for armature 10, simultaneously, support grab 22 also has the spatial margin of armature grab 10 rotations, and then armature 10 can be rotated around armature end flange 20.

Although in this embodiment, be fastened on by the armature grab and realize on the support grab that armature is supported on armature end flange and can rotating around armature end flange, but, be understandable that, if both sides arrange respectively an axis hole (open-work or half buried via hole) on armature end flange, a pair of axle then is set on the armature symmetrically, and the axle on the armature extend in the axis hole on the armature end flange, can provide support and armature can be rotated take this axis hole as fulcrum for armature equally.And, also there are other implementations that is equal to, armature can be supported on the armature end flange rotationally.

Also be provided with an elastic component 30 on the armature end flange 20, when in circuit, short circuit current occurring, the magnetic field meeting that electric current produces is so that thereby armature overcomes elastic component 30 is rotated, certainly, when if short circuit current disappearance or magnetic field are not enough to overcome elastic component, elastic component 30 after the compression can be pushed armature 10 open by means of its restoring force, and armature 10 can be the axle opposite spin around support grab 20.

In an embodiment, such as Fig. 2 and shown in Figure 7, elastic component 30 adopts torsion spring to realize that torsion spring has the main body 31 of a coiling multi-turn, and the two ends of main body 31 extend into respectively support portion 32 and operating member 33.

And such as Fig. 2 and shown in Figure 4, be provided with respectively a projection 21 on armature end flange 20 bilateral symmetry ground, the main body 31 of torsion spring just is set on this projection 21, in the end of armature end flange 20 (particularly, top at

rack side wall

20b and 20c) also has limiting section 234,32 of the support portions of torsion spring can be limited by the limiting section 234 on the support 20, and the operating member 33 of torsion spring then can promote armature 10.

In this embodiment, elastic component is two torsion springs that link together, particularly, the operating member of two torsion springs is joined together to form an independently torsion spring, certainly, is understandable that, also a torsion spring can be set respectively in the both sides of support, and the operating member of two torsion springs is not to link together, still, as long as guarantee the consistent action of two torsion springs.

Thereby adapt to different applicable cases for the ease of the elastic force of adjusting torsion spring, can spacing position, many places be set the limiting section 234 on armature end flange 20, such as two spacing positions shown in Fig. 2, one of them is support outer wall 24, another then is the groove 23 of

rack side wall

20b or 20c upper end, be placed into the support portion 32 of elastic component on the support outer wall 24 and be placed into groove 23 when interior, can have respectively different elastic force, correspondingly, the armature elastic force that need to overcome also just exists different.

The grooved spare of armature end flange 20 can form a spatial accommodation 25, the bimetal leaf 50 of circuit breaker just can be arranged in the spatial accommodation 25, one end of bimetal leaf 50 is connected with conductive plate 40, the other end then with wire 60(such as braided part etc.) conduction is connected, thereby is convenient to trigger armature adhesive dropout when overload occurring.

And in order to realize preferably conduction connection between conductive plate and the armature end flange, conductive plate and armature end flange can be entrenched togather, ratio as shown in Figure 4 and Figure 5, at conductive plate 40 projection 43 is set, and the corresponding position on armature end flange 20 arranges an open-work 26, projection 43 is entrenched in the open-work 26, perhaps adopts the forms such as riveted joint, welding that conductive plate 40 and armature end flange 20 conductions are fixed together.

Conductive plate 40 has the outstanding wing 41 of two symmetries, conductive plate can be arranged on the base 80 of circuit breaker by 41 on these two wings, correspondingly, as shown in Figure 6, at circuit breaker base 80 symmetrical stopper slot 81 is set, the wing 41 of conductive plate is inserted in the stopper slot 81, and then conductive plate 40 just can be limited in the base 80.

Circuit breaker base 80 is design further, for example in restriction protrusion 82 of base 80 designs, be used for when elastic component 30 promotes armature 10 rotation, stopping the further motion of armature 10, correspondingly, as shown in Figure 3, at extension 13 of armature 10 designs, extension 13 extends certain distance from armature main body 11, as shown in Figure 8, armature 10 " obvolvent " presents nature when (or claiming initial condition) at armature end flange 20, extension 13 can be resisted against on the restriction protrusion 82 on the base 80, and when elastic component 30 promotes armatures 10 rotation, thereby restriction protrusion 82 can be by stopping extension 13 so that armature 10 can only move to this initial condition.

Can design three base space 80A, 80B and 80C on the base 80, thereby hold three utmost point trip units, each base space can design equally the stopper slot 81 with restriction conductive plate and stop the further restriction protrusion 82 of motion of armature.

When concrete the installation, as shown in Figure 7, can first conductive plate 40 be fixed on the armature end flange 20, put into bimetal leaf 50 and fixing with conductive plate 40 and wire 60, the main body of elastic component 30 is set in projection 21 places on the armature end flange 20, adjust the Support Position of elastic component support portion 31, with armature 10 levels or extend into obliquely armature end flange 20 bottoms, again armature grab 12 is fastened on the support grab 22, according to being rotated counterclockwise shown in the direction of arrow to certain position among the figure, the assembly that assembles can be put into circuit breaker base 80 at last, the stopper slot 81 of the wing 41 inserted bases 80 of conductive plate, and by the restriction protrusion 82 on the base against the extension 13 of living armature, be state after the installation shown in Figure 8.

When overload occurring in the circuit, bimetal leaf just can temperature distortion, and the adjustment screw 70 on the bimetal leaf is along with distortion can drive the tripping mechanism (not shown), if the deflection of bimetal leaf reaches the full quota, the power that then produces can surpass the resistance of tripping mechanism, thereby circuit breaker is realized threading off.

As shown in Figure 9, when short circuit current occurring in the circuit, electric current can produce larger magnetic field, thereby with armature 10 and armature end flange 20 magnetization, the magnetic force meeting that forms is so that armature 10 has the trend around armature end flange 20 rotations, when thereby this external force can overcome elastic component 30 to the resistance that can surpass elastic component 30 greatly, armature 10 just can be rotated counterclockwise according to arrow shown in Fig. 9 (a), thereby compression elastic piece 30(is shown in Fig. 9 (b)), thereby tripping mechanism just can move dropout, short circuit current is cut off, behind the cutting-off of short-circuit electric current, magnetic field force just can disappear, armature 10 has just lost the external force that overcomes elastic component 30, and elastic component 30 just can rely on the elastic force of its savings that armature 10 is pushed open, 10 rightabout (being clockwise direction) rotations according to arrow among Fig. 9 (a) of armature, the armature 10 that is open rotates to just stop motion of certain position at the most, and the restriction protrusion on the circuit breaker base then defines this position.

Can find out to have the thermo magnetic trip release unit of the circuit breaker of this kind armature and armature end flange, structure is comparatively simple, and installation process is also comparatively easy, has improved the cost advantage of circuit breaker.

In this article, " schematically " expression " is served as example, example or explanation ", any diagram, the execution mode that is described in this article " schematically " should be interpreted as a kind of preferred or have more the technical scheme of advantage.

Above listed a series of detailed description only is specifying for feasibility embodiment of the present utility model; they are not to limit protection range of the present utility model, allly do not break away from equivalent embodiment or the change that the utility model skill spirit does and all should be included within the protection range of the present utility model.

Claims

1. a circuit breaker is characterized in that,

Comprise an armature (10) and an armature end flange (20), described armature (10) is supported on the described armature end flange (20) rotationally, and described circuit breaker also comprises an elastic component (30), and described elastic component (30) is arranged on the described armature end flange (20),

Described armature (10) is when being subject to External Force Acting, if described external force can overcome described elastic component (30), then described armature (10) can relatively described armature end flange (20) along a direction rotation, after this, when described external force was not enough to overcome described elastic component (30), described elastic component (30) can promote the relatively described armature end flange of described armature (10) (20) and rotate in opposite direction.

2. circuit breaker as claimed in claim 1, it is characterized in that, described armature (10) both sides have respectively an armature grab (12), described armature end flange (20) both sides have respectively a support grab (22), when described armature grab (12) was fastened on the described support grab (22), described armature (10) was supported on the described armature end flange (20) rotationally.

3. circuit breaker as claimed in claim 1 is characterized in that, also comprises a conductive plate (40), and described conductive plate (40) can be entrenched togather with described armature end flange (20).

4. circuit breaker as claimed in claim 3 is characterized in that, has a projection (43) on the described conductive plate (40), has an open-work (26) on the described armature end flange (20), and described projection (43) can be entrenched in the described open-work (26).

5. circuit breaker as claimed in claim 1, it is characterized in that, described circuit breaker also comprises a base (80) and a conductive plate (40), has a stopper slot (81) on the described base (80), and described conductive plate (40) can be limited in the described base (80) by described stopper slot (81).

6. circuit breaker as claimed in claim 1, it is characterized in that, described circuit breaker comprises a conductive plate (40) and a bimetal leaf (50), described armature end flange (20) is roughly the grooved spare with a spatial accommodation (25), described bimetal leaf (50) is arranged in the described spatial accommodation, one end is connected with described conductive plate (40), and the other end is connected with a wire (60).

7. circuit breaker as claimed in claim 1, it is characterized in that, described circuit breaker also comprises a base (80), described armature (10) has an extension (13), has a restriction protrusion (82) on the described base (80), when described elastic component (30) promoted described armature (10) rotation, described restriction protrusion (82) can be by stopping that described extension (13) is to limit being further rotated of described armature (10).

8. circuit breaker as claimed in claim 1, it is characterized in that, described armature end flange (20) both sides have respectively a projection (21), described armature end flange (20) end has a limiting section (234), described elastic component (30) is a torsion spring, described torsion spring set is located on the described projection (21), and an end (32) is by described limiting section (234) restriction, and the other end (33) then can promote described armature (10).

9. circuit breaker as claimed in claim 8 is characterized in that, described limiting section (234) has spacing position, at least two places (23,24).