CN217061989U - Circuit breaker - Google Patents

Abstract

A circuit breaker comprises a shell, wherein a plurality of circuit breaker poles are arranged in the shell in parallel, two adjacent circuit breaker poles are separated through a partition plate, one circuit breaker pole serves as an N pole, the N pole comprises a pair of N pole wiring terminals and an N pole contact mechanism arranged between the pair of N pole wiring terminals, the N pole contact mechanism comprises an N pole moving contact and an N pole static contact which are matched with each other, an N pole arc striking plate is further arranged in the N pole, the plane where the N pole arc striking plate is located is parallel to the partition plate between the two circuit breaker poles of the N pole, and the first end of the N pole arc striking plate is connected with the N pole static contact. The utility model relates to a circuit breaker sets up the N utmost point striking board in the N utmost point, can improve the striking effect of the N utmost point, avoids the influence of arc gas to spare part in the circuit breaker, and the parallel baffle of the N utmost point striking board just presses close to the N utmost point, and the space that occupies in the N utmost point is less, has solved the current N utmost point because of the defect that narrow and small unable overall arrangement can the switching contact.

Description

Circuit breaker

Technical Field

The utility model relates to a low-voltage apparatus field, concretely relates to circuit breaker.

Background

In the low voltage power transmission and distribution field, miniature circuit breaker is a main circuit control equipment, along with domestic and industrial power supply environment more and more complicated, block terminal, various industrial electrical equipment etc. need place more circuit breakers in order to satisfy the power consumption safety of different regional different circuits in the same space, consequently, the circuit breaker also constantly develops towards miniaturization, intellectuality, modular direction. In the existing integral and compact miniature circuit breaker, because the internal space of an N pole is narrow and compact in layout, the layout and the structural design of an N pole arc striking angle are very important, the normal on-off of the circuit breaker is required to be met, and certain reliability in the aspect of arc burning resistance is also required.

Disclosure of Invention

An object of the utility model is to overcome prior art's defect, provide a circuit breaker simple structure, that the reliability is high.

In order to achieve the above purpose, the utility model adopts the following technical proposal:

the utility model provides a circuit breaker, includes the shell be provided with a plurality of circuit breaker utmost point side by side in the shell, two adjacent circuit breaker utmost point pass through the baffle and separate, and one of them circuit breaker utmost point is as the N utmost point, the N utmost point includes a pair of N utmost point binding post and sets up the N utmost point contact mechanism between a pair of N utmost point binding post, N utmost point contact mechanism includes N utmost point moving contact and the N utmost point static contact of mutually supporting still be provided with the N utmost point run-on board in the N utmost point, the N utmost point run-on board place plane is on a parallel with the baffle between two circuit breaker utmost point of the N utmost point, and the first end and the N utmost point static contact of N utmost point run-on board are connected.

Furthermore, the first end of the N-pole arc striking plate is bent to form an N-pole static contact plate, a contact is arranged on one side of the N-pole static contact plate, which is opposite to the N-pole moving contact, to form an N-pole static contact, and the plane of the N-pole static contact plate is perpendicular to the plane of the N-pole arc striking plate.

Further, the circuit breaker adjacent with the N utmost point is the L utmost point, the L utmost point includes handle mechanism, second operating device and the contact mechanism of L utmost point, handle mechanism is connected with the operating device linkage, and L utmost point contact mechanism separates by the baffle of N utmost point with the contact mechanism of N utmost point, and the second end of the arc ignition board of N utmost point is connected with the electromagnetic system electricity that sets up in other circuit breaker utmost points.

Further, the L pole is also provided with an arc extinguishing system, a coil assembly of an electromagnetic system is arranged between the arc extinguishing system and the handle mechanism, one end of the coil assembly is opposite to the second operating mechanism, and the second end of the N pole arc striking plate is connected with the coil assembly through a lead.

Furthermore, the N-pole partition plate is provided with a positioning groove for positioning the N-pole arc striking plate, one end of the positioning groove is positioned on one side of the N-pole static contact due to the inclined arrangement of the positioning groove, the other end of the positioning groove is provided with a threading hole, and the threading hole penetrates through the N-pole partition plate on one side corresponding to the handle mechanism.

Further, the N utmost point striking plate is including the strip shaped plate that is on a parallel with the baffle of the N utmost point, is close to the strip shaped plate side of first end tip by the strip shaped plate and outwards extends and twist reverse the relative N utmost point static contact plate of formation and strip shaped plate side, N utmost point static contact plate perpendicular to N utmost point baffle N utmost point static contact plate is equipped with the contact back to one side face of strip shaped plate side.

Further, be equipped with the welding groove at the second end of bar shaped plate the welding inslot welding has the wire, the tank bottom surface in welding groove and the difference in height between the baffle surface of the N utmost point are 1.3mm, and the groove depth of constant head tank is 2.4 mm.

Furthermore, the multiple breaker poles comprise at least one L pole provided with a first operating mechanism and one L pole provided with a second operating mechanism, and the first operating mechanism and the second operating mechanism are in linkage connection to realize synchronous opening and closing actions.

Further, the circuit breaker utmost point includes that one sets up in the N utmost point of avris and sets up in the three L utmost point of the same one side of N utmost point, is provided with an earth leakage protection utmost point in L utmost point one side, earth leakage protection utmost point and N utmost point are located the both sides of same L utmost point, and the adjacent L utmost point with N utmost point is provided with second operating device, and two L utmost points of keeping away from the N utmost point are provided with first operating device.

Furthermore, the shell is provided with at least two indicating windows, and the indicating windows respectively correspond to the opening and closing states of the first operating mechanism and the second operating mechanism.

The utility model relates to a circuit breaker sets up the N utmost point striking board in the N utmost point, can improve the striking effect of the N utmost point, avoids the influence of arc gas to spare part in the circuit breaker, and the parallel baffle of the N utmost point striking board just presses close to the N utmost point, and the space that occupies in the N utmost point is less, has solved the current N utmost point because of the defect that narrow and small unable overall arrangement can the switching contact.

In addition, an N-pole static contact plate is formed by the first end of the N-pole arc striking plate, an N-pole static contact is formed by the welding contact of the N-pole static contact plate, and a welding groove is formed in the second end of the N-pole arc striking plate and used for welding a lead, so that the welding efficiency is improved, and the whole occupied space is small.

Drawings

Fig. 1 is a schematic structural diagram of a circuit breaker according to the present invention;

fig. 2 is a schematic structural diagram (including an indication window) of a circuit breaker according to the present invention;

fig. 3 is a cross-sectional view of a circuit breaker of the present invention;

FIG. 4 is a schematic structural view of the L pole of the present invention;

fig. 5 is a schematic structural diagram of the middle leakage protection electrode of the present invention;

fig. 6 is a schematic structural diagram of the middle leakage protection electrode of the present invention (including a circuit board);

FIG. 7 is a schematic view of the bottom structure of the middle leakage protection electrode of the present invention;

FIG. 8 is a schematic structural view of a spacer at one side of the middle leakage protection electrode of the present invention;

FIG. 9 is a schematic view of the other side separator of the middle leakage protection electrode of the present invention;

fig. 10 is a schematic structural view of the N pole in the present invention;

FIGS. 11-12 are schematic structural diagrams of the electromagnetic system of the present invention;

fig. 13 is a schematic structural diagram of a coil assembly according to the present invention;

fig. 14 is a cross-sectional view of a coil assembly according to the present invention;

fig. 15 is a schematic view of the width of the coil assembly of the present invention;

fig. 16 is a schematic structural view of a first operating mechanism of the present invention;

fig. 17 is a schematic structural view of a second operating mechanism of the present invention;

fig. 18 is a schematic structural view of a connecting rod of the present invention;

fig. 19 is a schematic structural view of the N-pole arc striking plate of the present invention.

Detailed Description

The following describes a circuit breaker according to an embodiment of the present invention with reference to fig. 1 to 19. The present invention is not limited to the description of the following embodiments.

As shown in fig. 1, a circuit breaker includes a housing, a plurality of partition boards 13 are arranged in parallel in the housing, a space in the housing is divided into a plurality of installation cavities by the plurality of partition boards 13, each partition board 13 includes a partition board and a side wall arranged along an edge of the partition board, wherein the side wall is arranged along a direction perpendicular to the partition boards, the partition boards are positioned between two adjacent circuit breaker poles to perform a partition function, a circuit breaker pole is assembled in each installation cavity to form a multi-pole circuit breaker, the plurality of circuit breaker poles include at least one N pole 4 and at least two L poles 2, at least one installation cavity positioned between the two circuit breaker poles is used for arranging an earth leakage protection pole 3, the earth leakage protection pole 3 is separated from the adjacent circuit breaker poles by the partition boards 13, operating mechanisms connected with each other in a linkage manner are respectively arranged in the earth leakage protection pole 3 and the L poles 2, the operating mechanisms of the two adjacent circuit breaker poles are connected in a linkage manner, preferably, the earth leakage protection electrode 3 is disposed between the two L poles 2, and the earth leakage protection electrode 3 and the N pole 4 are respectively located on two sides of the same L pole 2, but of course, the earth leakage protection electrode 3 and the N pole 4 may also be located on two sides of different L poles 2, that is, two or more L poles 2 are disposed between the earth leakage protection electrode 3 and the N pole 4.

The L pole 2 comprises an L pole wiring terminal 24, a handle mechanism, an operating mechanism, an L pole contact mechanism and an arc extinguishing system, wherein the L pole contact mechanism comprises an L pole moving contact 231 and an L pole static contact 232, the handle mechanism, the operating mechanism and the L pole moving contact 231 are sequentially connected in a linkage manner, so that the L pole moving contact 231 is close to or far away from the L pole static contact 232 to realize switching-on and switching-off actions, and accordingly an L pole 2 circuit is switched on or switched off, the arc extinguishing system is arranged on one side of the L pole contact mechanism and used for extinguishing electric arcs generated by breaking, furthermore, a protection mechanism can be arranged in the L pole 2 and comprises a short circuit protection mechanism and/or an overload protection mechanism, and when a short circuit or overload fault occurs, the protection mechanism finishes the protection actions; the N pole 4 includes an N pole connection terminal 43 and an N pole contact mechanism connected to the N pole connection terminal 43, and the N pole contact mechanism includes an N pole moving contact and an N pole stationary contact which are matched with each other; the leakage protection mechanism comprises a third operating mechanism 31 and an electromagnetic coil 52 of the electromagnetic system 5 which are matched with each other, and when a leakage fault occurs, the third operating mechanism 31 is driven to act and drive the L pole 2 and the N pole 4 to be switched off, so that leakage protection is realized.

An improvement of the present application is that the N pole 4, the operating mechanism is omitted in the N pole 4, and the N pole contact mechanism is driven by the operating mechanism of one L pole 2 adjacent to the N pole 4, so that the internal widths of the two installation cavities for assembling the N pole 4 and the L pole 2 can be further compressed, thereby reducing the overall width of the circuit breaker.

Further, as shown in fig. 10, an N-pole arc striking plate 42 with a small occupied space is disposed in the N-pole 4, and the N-pole arc striking plate 42 is additionally disposed to improve the arc striking effect on the N-pole 4, so as to avoid adverse effects of high-temperature arcs on the circuit breaker. The N-pole arc ignition plate 42 is disposed on one side of an N-pole static contact of the N-pole contact mechanism, and a plane of the N-pole arc ignition plate 42 is parallel to the partition 13 of the N-pole 4, and can be close to the partition 13, so as to reduce a gap between the N-pole arc ignition plate 42 and the partition 13, and avoid increasing the width of the N-pole 4.

With reference to fig. 1 to 19, a circuit breaker is described in detail, which includes a housing, the housing includes a base 12 and an upper cover 11 that are covered with each other, four partition plates 13 are juxtaposed between the base 12 and the upper cover 11, the four partition plates 13 divide the internal space of the housing into five mounting cavities, a breaker pole or an earth leakage protection pole 3 is installed in each mounting cavity, in this embodiment, the internal width of the mounting cavity located at the most middle is 18.8mm and the earth leakage protection pole 3 is installed in the mounting cavity, the internal widths of the two mounting cavities located at one side of the earth leakage protection pole 3 are 14.4mm respectively, an L pole 2 is installed in each of the two mounting cavities having an internal width of 14.4mm, in this embodiment, the two L poles 2 are connected to a phase line and a phase line B phase line respectively, the total internal width of the two mounting cavities located at the other side of the earth leakage protection pole 3 is 16.6mm, in this embodiment, another L pole 2 is mounted in a mounting cavity adjacent to the earth leakage protection electrode 3, the L pole 2 is connected with a C phase line, the N pole 4 is disposed in a mounting cavity at the outermost side, the partition plate 13 of the N pole 4 is covered by the upper cover 11, and by further adjusting the wall thickness of the partition plate 13 and the housing, the overall width of the housing is less than or equal to 72mm, so that the modular requirement of 4 modular widths, that is, the overall width of less than or equal to 4 × 18, can be satisfied.

In the present embodiment, the two L poles 2 arranged in parallel on one side of the earth leakage protection electrode 3 have the same structure, as shown in fig. 4, the L pole 2 includes L pole connection terminals 24 respectively arranged at both ends of the L pole 2, a handle mechanism, a first operating mechanism 21, an L pole contact mechanism and an arc extinguishing system are arranged between the L pole connection terminals 24, wherein the handle mechanism is linked with the first operating mechanism 21 and arranged at the upper part of the L pole 2, an L pole moving contact 231 of the L pole contact mechanism is connected at the lower part of the first operating mechanism 21, an L pole fixed contact 232 and the arc extinguishing system of the L pole contact mechanism are arranged at the middle part of the L pole 2, a coil assembly 51 of the electromagnetic system 5 is arranged between the handle mechanism and the arc extinguishing system, one end of the coil assembly 51 is opposite to the first operating mechanism 21, when a short circuit fault occurs, the coil assembly 51 drives the first operating mechanism 21 to trip, an overload protection mechanism is disposed between the L-pole moving contact 231 and one L-pole connection terminal 24, and a movable end of the overload protection mechanism is opposite to the first operating mechanism 21.

As shown in fig. 16, the first operating mechanism 21 includes a first lever, a first jump ring and a first lock 211, wherein the first lever is rotatably assembled in the installation cavity, the first jump ring and the first lock 211 are rotatably assembled on the first lever, the first jump ring is in linkage connection with the handle mechanism through a connecting rod 34, the first jump ring is in snap-fit with one end of the first lock 211, the other end of the first lock 211 is opposite to one end of the coil component 51, the other end of the first lock 211 is further connected with a trip hook for cooperating with the overload protection mechanism, and when an overload fault occurs, the movable end of the overload protection mechanism drives the first lock 211 to rotate through the trip hook, thereby implementing overload protection. Further, the first operating mechanism 21 may further include a first resetting element, the first resetting element is connected to the first latch 211, and the first resetting element cooperates with the housing to provide a resetting force to the first latch 211. In this embodiment, the first operating mechanisms 21 of the two L-shaped poles 2 arranged side by side are linked by the split shaft 25 (see fig. 3), and the first operating mechanism 21 adjacent to the earth leakage protection pole 3 is provided with a boss structure as a first connecting portion 212, and the first connecting portion 212 is extended into the earth leakage protection pole 3 through the partition plate 13 and linked with the connecting rod 34.

In addition, an indication window 17 is opened on the upper portion of the housing corresponding to the first operating mechanism 21, an indication member linked with the first operating mechanism 21 is arranged in the indication window 17, the indication member correspondingly displays that the first operating mechanism 21 is in an opening state or a closing state, for example, the indication member may be a push plate slidably assembled on the indication window 17, the push plate is pushed by the first operating mechanism 21, and the push plate is provided with corresponding marks, for example, red indicates closing and green indicates opening.

In the present embodiment, as shown in fig. 11 to 15, the electromagnetic system 5 is an integral structure, the electromagnetic system 5 includes a plurality of coil assemblies 51 arranged in parallel, one coil assembly 51 arranged in the L pole 2 is located between the handle mechanism and the arc extinguishing system, two ends of the coil assembly 51 are respectively connected to the L pole stationary contact 232 and one L pole connection terminal 24, preferably, the width of the coil assembly 51 is 13.4mm (i.e. a in fig. 15 represents the width of the coil assembly 51, which can also be understood as the outer diameter of the coil assembly 51), the coil 513 is wound with a reduced wire diameter, which has a smaller diameter compared with the existing 14.2mm coil assembly 51, so that the space between the coil assembly 51 and the partition 13 is enlarged, and a thickened portion is formed in a region of the partition 13 corresponding to the coil assembly 51, so that the thickness of the partition 13 between two adjacent coil assemblies 51 is also increased, which is beneficial to reduce the side temperature rise of the circuit breaker, in addition, the coil block 51 having a smaller width makes one end of the coil block 51 smaller in cross section, and thus the contact surface with the side wall of the mounting cavity is also smaller, so that the side wall of the mounting cavity between the handle mechanism and the coil block 51 has more vacant parts, and accordingly the side wall of the mounting cavity can be thickened. Of course, the coil assembly 51 having a smaller diameter does not affect its performance and can be implemented by the flat coil 53, the number of turns, the width of the re-matching coil 513, and the like.

As shown in fig. 12-15, the coil assembly 51 includes a bracket 511, a bobbin 512, a coil 513, a movable iron core 514, a stationary iron core 515, a push rod 516 and a return spring 517, the bobbin 512 is assembled on the bracket 511, the coil 513 is wound on the outer side of the bobbin 512, the movable iron core 514 and the stationary iron core 515 are respectively disposed at two opposite ends of the bobbin 512, a through hole is disposed at the middle portion of the stationary iron core 515, the push rod 516 penetrates through the through hole of the stationary iron core 515, one end of the push rod 516 is connected to the movable iron core 514, the other end of the push rod 516 is opposite to the first latch 211 of the first operating mechanism 21, the return spring 517 is sleeved outside the push rod 516 and located inside the bobbin 512, two ends of the return spring 517 are respectively abutted against the movable iron core 514 and the stationary iron core 515, when a short circuit fault occurs, the coil 513 drives the movable iron core 514 to operate so that the other end of the push rod 516 triggers the first latch 211 to rotate, thereby tripping the first operating mechanism 21.

The L-pole static contact 232 connected with the coil assembly 51 comprises an L-pole static contact plate, a contact and an L-pole arc striking plate 2322, preferably, the L-pole static contact plate is integrally formed with the support 511 of the coil assembly 51, one end of the L-pole static contact plate is bent and extends obliquely along the direction close to the coil assembly 51 to form an oblique section 2321, one terminal 5131 of the coil 513 extends obliquely and is connected with the oblique section 2321, so that only one welding point is arranged between the coil 513 and the L-pole static contact plate, meanwhile, current directly flows into the coil 513 through the L-pole static contact plate, the distance of the current flowing through the coil assembly 51 is shortened, the temperature rise of the position of the coil assembly 51 is effectively reduced, and the reduction of the temperature rise of the side face of a product is facilitated; a contact is arranged on one side of the L-pole static contact plate, which is opposite to the coil assembly 51, and the other end of the L-pole static contact plate is bent and folded back to a direction close to the bracket 511 to form an L-pole arc striking plate 2322.

In this embodiment, the L poles 2 located at two sides of the leakage protection pole 3 are similar, the L pole 2 separately disposed at one side of the leakage protection pole 3 includes an L pole connection terminal 24, a handle mechanism, an L pole contact mechanism, an arc-extinguishing chamber, and an overload protection mechanism, which are the same as the other two L poles 2, and the assembly position is the same as the position of the other two L poles 2, another coil assembly 51 of the electromagnetic system 5 is disposed between the handle mechanism and the arc-extinguishing system, a side wall of an installation cavity between the handle mechanism and the arc-extinguishing system (i.e., the partition 13, specifically, the partition of the partition 13) is also thickened to form a thickened portion, so as to reduce the side temperature rise, and the other end of the coil assembly 51 and the L pole fixed contact 232 are also the same as the other two L poles 2 in combination and connection manner.

Different from the other two L-poles 2, as shown in fig. 9 and 17, a second operating mechanism 22 is disposed on one side of the handle mechanism, the second operating mechanism 22 includes a second lever rotatably assembled in the mounting cavity, the second lever is rotatably assembled with a second jump buckle, a second latch 221, and a second reset piece 222, wherein the second jump buckle is linked with the handle mechanism, the second jump buckle is in snap-fit with one end of the first latch 211, one end of the coil assembly 51 is opposite to the other end of the second latch 221, a trip hook matched with the overload protection mechanism is further disposed at the other end of the second latch 221, the second reset piece 222 is linked with the second latch 221, the second reset piece 222 is matched with a side wall of the mounting cavity to provide a reset force for the second latch 221, and in addition, a groove structure is disposed on the second reset piece 222 as a second connecting portion 223. Of course, the second operating mechanism 22 and the first operating mechanism 21 may have the same structure.

An indication window 17 is also provided above the L-pole 2 on which the second operating mechanism 22 is provided, and the indication window 17 indicates whether the second operating mechanism 22 is in the open position or the closed position, as in the case of the indication windows 17 of the other two L-poles 2.

In the present embodiment, as shown in fig. 1 and 10, the N-pole 4 is disposed in the mounting cavity on the most lateral side, that is, the N-pole 4 and the earth leakage protection electrode 3 are respectively disposed on both sides of the L-pole 2 provided with the second operating mechanism 22, and the N-pole contact mechanism of the N-pole 4 is driven by the second operating mechanism 22, so that the mounting cavity of the N-pole 4 can be further compressed.

As shown in fig. 10 and 19, the N-pole contact mechanism includes an N-pole moving contact and an N-pole stationary contact which are matched with each other, wherein the N pole moving contact is linked with the second lever, the N pole static contact is arranged in the middle of the N pole 4, an N-pole arc ignition plate 42 is arranged on one side of the N-pole contact mechanism, the N-pole arc ignition plate 42 is parallel to and close to the partition plate 13 of the N pole 4, the first end of the N-pole arc ignition plate 42 is connected with an N-pole static contact, preferably, the first end of the N-pole arc ignition plate 42 is bent to form an N-pole static contact 421, a contact is arranged on one side of the N-pole static contact plate 421 opposite to the N-pole moving contact to form an N-pole static contact, the plane of the N-pole static contact plate 421 is perpendicular to the plane of the N-pole arc ignition plate 42, the plane of the N-pole arc ignition plate 42 is perpendicular to the width direction of the circuit breaker, the plane of the N-pole static contact plate 421 is parallel to the width direction of the circuit breaker, and the second end of the N-pole arc ignition plate 42 is connected with the coil assembly 51 of the adjacent L pole 2 through a wire 6. Further, a positioning groove 15 for positioning the N-pole arc striking plate 42 is disposed on the partition 13 of the N-pole 4, as shown in fig. 10, one end of the positioning groove 15 is disposed at one side of the N-pole static contact by inclining the positioning groove 15, and a thread hole is disposed at the other end of the positioning groove 15, and the thread hole penetrates through the partition 13 of the N-pole 4 corresponding to one side of the handle mechanism, that is, the positioning groove 15 is disposed at an incline and extends from a position corresponding to the N-pole static contact to a position close to the handle mechanism.

It should be noted that, because the two mounting cavities for mounting the N pole 4 and the L pole 2 provided with the second operating mechanism 22 have smaller widths, the N pole connection terminal 43 and the L pole connection terminal 24 can occupy positions on two sides of the earth leakage protection pole 3, at this time, the L pole connection terminal 24 is located in the earth leakage protection pole 3, and the N pole connection terminal 43 is located at two ends of the L pole 2 and the N pole 4.

The structure of an N-pole arc-striking plate 42 is provided with reference to fig. 19, the N-pole arc-striking plate 42 includes a strip-shaped plate parallel to the partition plate 13 of the N-pole 4, a side edge of the strip-shaped plate close to the end portion of the first end extends outwards and is twisted to form an N-pole static contact plate 421 opposite to the side edge of the strip-shaped plate, the N-pole static contact plate 421 is perpendicular to the partition plate 13 of the N-pole 4, a side plate surface of the N-pole static contact plate 421 opposite to the side edge of the strip-shaped plate is provided with a contact to form an N-pole static contact, the second end of the strip-shaped plate is provided with a welding groove 422, a height difference between a groove bottom surface of the welding groove 422 and a surface of the partition plate 13 of the N-pole 4 is 1.3mm, a groove depth of the positioning groove 15 is 2.4mm, a lead 6 is welded in the welding groove 422, and the other end of the lead 6 passes through a threading hole to be connected with the coil component 51. In the present embodiment, the N-pole arc runner 42 allows a narrow N-pole to satisfy the breaking function, and its arc is small and can be introduced into a triangular region at the lower right of the partition 13 in fig. 10.

As shown in fig. 1-3 and 5-9, the earth leakage protection electrode 3 is disposed in the middle mounting cavity, and the earth leakage protection electrode 3 comprises an earth leakage handle mechanism 32, a third operating mechanism 31, a connecting rod 34, an electromagnetic coil 52 in the electromagnetic system 5, a circuit board 36, an electromagnetic relay 35 and a test button loop. As shown in fig. 5, the earth leakage handle mechanism 32 is linked with the third operating mechanism 31 and disposed on the upper portion of the earth leakage protection electrode 3, and the electromagnetic coil 52 is disposed below the earth leakage handle mechanism 32 and on one side of the third operating mechanism 31, in this embodiment, the electromagnetic coil 52 is disposed in parallel with a plurality of coil assemblies 51, and the electromagnetic coil 52 is separated from the adjacent coil assemblies 51 by the partition plate 13, so that the corresponding positions of the electromagnetic coil 52 and the coil assemblies 51 in each mounting cavity are the same, and the electromagnetic coil 52, the circuit board 36 and the electromagnetic relay 35 cooperate to drive the third operating mechanism 31.

As shown in fig. 5, the third operating mechanism 31 includes a third lever 311 which is rotatably mounted, the third lever 311 is linked with the residual current handle mechanism 32, a driving arm 312 is provided at one end of the third lever 311, a connecting rod 34 is coaxially and rotatably mounted with the third lever 311, the third lever 311 is linked with the operating mechanisms of two adjacent L poles 2 through the connecting rod 34, that is, the first lever, the second lever and the third lever 311 are linked together through the connecting rod 34.

Referring to fig. 18, a specific structure of a connecting rod 34 is provided, where the connecting rod 34 includes a rotating portion 344 and a U-shaped plate, the rotating portion 344 is a fan-shaped structure, the fan-shaped structure is provided with a hollow area to reduce the overall weight of the connecting rod 34, a rotating connection slot is provided at a center of the rotating portion 344, a first rod 34a and a second rod 34b are respectively formed by protruding in a radial direction of the rotating connection slot, a distal end of the first rod 34a is bent in a direction parallel to a central axis of the rotating connection slot to form a third linkage portion 343, a driving arm 312 of the third lever 311 is located between the electromagnetic coil 52 and the third linkage portion 343, an actuating mechanism is provided between the driving arm 312 and the electromagnetic relay 35, the electromagnetic relay rotates the driving arm 312 through an actuating assembly, the U-shaped plate is connected to a distal end of the third linkage portion 343 as a first linkage portion 341, a first connection portion 212 of the first lock 211 is clamped in a hollow area of the U-shaped plate, a protruding shaft is protruded from one side of the second rod 34b opposite to the third linking part 343, the protruding shaft is used as the second linking part 342 and is parallel to the central axis of the rotary connecting groove, and the second linking part 342 passes through the partition 13 and is in inserting fit with the second connecting part 223 of the second reset piece 222.

When the circuit breaker is switched on, the operating mechanism of the L pole 2 rotates clockwise, so that the link 34 rotates clockwise along with the operating mechanism of the L pole 2, specifically, in this embodiment, the first operating mechanism 21 and the second operating mechanism 22 of two L poles 2 adjacent to the earth leakage protection pole 3 rotate in the switching-on direction, so that the link 34 rotates to the switching-on position under the common cooperation of the first connecting portion 212 and the first linkage portion 341, and the second connecting portion 223 and the second linkage portion 342, and when the link 34 rotates to the switching-on position, there are two cases, the first case is that an earth leakage fault does not occur, at this time, the third operating mechanism 31 is in the switching-on position, and in the process that the link 34 rotates to the switching-on position, the driving arm 312 and the third linkage portion 343 do not cooperate, so that the third operating mechanism 31 is not affected; the second is to release the leakage fault of the circuit breaker, at this time, the third operating mechanism 31 is in the open state, and when the connecting rod 34 rotates to the close position, the driving arm 312 cooperates with the third linkage 343 to drive the first operating mechanism 21, the second operating mechanism 22 and the third operating mechanism 31 to be in the close position at the same time.

When the circuit breaker is normally opened, i.e. the circuit breaker is opened without leakage fault, the operating mechanism of the L pole 2 rotates counterclockwise, so that the two L poles 2 adjacent to the leakage protection pole 3 rotate in the opening direction under the linkage of the connecting rod 34, at this time, the connecting rod 34 is only used for linking the operating mechanisms of the two L poles 2, the connecting rod 34 rotates in the opening direction along with the operating mechanism of the L pole 2 and does not drive the third operating mechanism 31, so the third operating mechanism 31 does not act, in this embodiment, when the two L poles 2 located on the same side of the leakage protection pole 3 are opened, the first latch 211 of the first operating mechanism 21 rotates counterclockwise, the first connecting portion 212 and the first linking portion 341 cooperate to rotate the connecting rod 34 counterclockwise, at this time, the second linking portion 342 and the second connecting portion 223 cooperate to drive the second operating mechanism 22 to rotate in the opening direction, and similarly, when the single L pole 2 located on one side of the leakage protection pole 3 is opened, the second operating mechanism 22 also drives the first operating mechanism 21 to rotate in the opening direction through the connecting rod 34, but the third linkage 343 does not trigger the driving arm 312 during the opening rotation of the L-pole 2, so the third operating mechanism 31 of the earth leakage protection pole 3 does not operate;

when an electric leakage fault occurs, the operating mechanism of the electric leakage breaker drives the operating mechanisms of two adjacent L poles 2 to rotate towards the opening direction together through the connecting rod 34, and the specific process is that when the electric leakage fault occurs, the driving arm 312 rotates and drives the connecting rod 34 to rotate anticlockwise by triggering the third linkage portion 343, and at the moment, the first linkage portion 341 is matched with the first connecting portion 212 and the second linkage portion 342 is matched with the second connecting portion 223 simultaneously, so as to drive the first operating mechanism 21 and the second operating mechanism 22 to rotate anticlockwise to open the opening simultaneously.

In the present embodiment, the first connection portion 212 is provided at the lower portion of the first latch 211, and the second connection portion 223 is provided at the second reset piece 222 such that the first interlocking portion 341 of the link 34 is lower than the second interlocking portion 342, but the link 34 is not limited to the above shape, and the shapes of the first interlocking portion 341, the second interlocking portion 342, and the third interlocking portion 343 may be adjusted accordingly.

An installation space is reserved on one side of the electromagnetic coil 52, in the embodiment, as shown in fig. 6-9, the installation space is located at the lower part of the earth leakage protection electrode 3, that is, below the third operating mechanism 31, a notch 18 opposite to the installation space is opened on the bottom wall of the installation cavity, the operating opening is closed by a cover plate 14, the circuit board 36 and the electromagnetic relay 35 are fixed at one side of the cover plate 14 pair and correspondingly placed in the installation space, a clamping structure is arranged at the edge of the installation space, the circuit board 36 and the electromagnetic relay 35 are limited in the installation space by the clamping structure, as shown in fig. 6-8, the clamping structure comprises a first clamping groove 161, a second clamping groove 162 and at least one baffle 163, wherein the first clamping groove 161 is in matched clamping connection with the side of the circuit board 36, the circuit board 36 is positioned by the baffle 163, three baffles 163 are arranged in fig. 6 and 8, each baffle 163 is used for positioning three sides of the circuit board 36, and the other side of the circuit board 36 is fixedly connected to the cover plate 14, wherein two opposite baffles 163 form a first mounting cavity in the mounting space, and a second mounting cavity is formed by the rest of the mounting space, in this embodiment, as shown in fig. 7, the first mounting cavity matches with the circuit board 36 in size, so that the first mounting cavity and the second mounting cavity which are stacked are independent from each other, and in addition, the notch 18 corresponding to the mounting space can also be adjusted according to the sizes of the first mounting cavity and the second mounting cavity.

Earth leakage protection utmost point 3 still is provided with test button return circuit device 33, test button return circuit device 33 includes test return circuit and test button, earth leakage test button return circuit gets the electricity from the main line of circuit breaker, and test button sliding assembly is in setting up in the button hole on earth leakage protection utmost point 3 upper portion, and preferred button hole sets up the both ends about 3 upper portions on earth leakage protection utmost point with electric leakage handle mechanism 32 respectively, and under the circuit breaker combined floodgate state, the press test button is with switching on or breaking off of operation test return circuit, and test return circuit sets up along earth leakage protection utmost point 3's upper portion and avris position to save space, do benefit to the wiring, and test return circuit can adopt single breakpoint, two breakpoints and other structures.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model discloses to the ordinary skilled person in technical field's the prerequisite that does not deviate from the utility model discloses under the design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (10)

1. The utility model provides a circuit breaker, includes the shell, be provided with a plurality of circuit breaker utmost point side by side in the shell, two adjacent circuit breaker utmost point are separated through baffle (13), and one of them circuit breaker utmost point is as N utmost point (4), N utmost point (4) include a pair of N utmost point binding post (43) and set up the N utmost point contact mechanism between a pair of N utmost point binding post (43), N utmost point contact mechanism includes N utmost point moving contact and N utmost point static contact of mutually supporting, its characterized in that: an N-pole arc striking plate (42) is further arranged in the N pole (4), the plane where the N-pole arc striking plate (42) is located is parallel to the partition (13) between the two breaker poles of the N pole (4), and the first end of the N-pole arc striking plate (42) is connected with the N-pole fixed contact.

2. A circuit breaker as claimed in claim 1, characterized in that: an N-pole static contact plate (421) is formed by bending a first end of an N-pole arc striking plate (42), a contact is arranged on one side of the N-pole static contact plate (421) opposite to an N-pole moving contact to form an N-pole static contact, and the plane of the N-pole static contact plate (421) is perpendicular to the plane of the N-pole arc striking plate (42).

3. A circuit breaker according to claim 1, wherein: the circuit breaker that is adjacent with the N utmost point (4) is the L utmost point (2), the L utmost point (2) include handle mechanism, second operating device (22) and the contact mechanism of L utmost point, handle mechanism is connected with the operating device linkage, and the contact mechanism of L utmost point is separated by baffle (13) of the N utmost point (4) with the contact mechanism of N utmost point, and the second end of the arc striking plate of N utmost point (42) is connected with electromagnetic system (5) electricity that set up in other circuit breaker utmost points.

4. A circuit breaker as claimed in claim 3, characterized in that: the L pole (2) is also provided with an arc extinguishing system, a coil assembly (51) of an electromagnetic system (5) is arranged between the arc extinguishing system and the handle mechanism, one end of the coil assembly (51) is opposite to the second operating mechanism (22), and the second end of the N pole arc striking plate (42) is connected with the coil assembly (51) through a lead (6).

5. A circuit breaker as claimed in claim 4, characterized in that: the N pole (4) partition plate (13) is provided with a positioning groove (15) used for positioning the N pole arc striking plate (42), one end of the positioning groove (15) is located on one side of the N pole static contact due to the fact that the positioning groove (15) is obliquely arranged, the other end of the positioning groove (15) is provided with a threading hole, and the threading hole penetrates through the partition plate (13) corresponding to the N pole (4) on one side of the handle mechanism.

6. A circuit breaker according to any one of claims 1 to 5, wherein: the N utmost point run-on board (42) are including the bar board that is on a parallel with baffle (13) of the N utmost point (4), are close to the outside extension of bar board side of first end tip by the bar board and twist reverse the N utmost point static contact board (421) that form is relative with the bar board side, and N utmost point static contact board (421) perpendicular to baffle (13) of the N utmost point (4) one side face of N utmost point static contact board (421) back to bar board side is equipped with the contact.

7. A circuit breaker according to claim 6, wherein: be equipped with welding groove (422) at the second end of shaped plate welding wire (6) have been welded in welding groove (422), the tank bottom surface of welding groove (422) is 1.3mm with baffle (13) the surface of the N utmost point (4) difference in height, and the groove depth of constant head tank (15) is 2.4 mm.

8. A circuit breaker according to claim 1, wherein: the multiple circuit breaker poles comprise at least one L pole (2) provided with a first operating mechanism (21) and one L pole (2) provided with a second operating mechanism (22), and the first operating mechanism (21) and the second operating mechanism (22) are connected in a linkage mode to achieve synchronous opening and closing actions.

9. A circuit breaker as claimed in claim 8, wherein: the circuit breaker utmost point includes that one sets up in the N utmost point (4) of avris and sets up in the three L utmost point (2) of N utmost point (4) with one side, is provided with one earth leakage protection utmost point (3) in L utmost point (2) one side, earth leakage protection utmost point (3) and N utmost point (4) are located the both sides of same L utmost point (2), are provided with second operating device (22) with N utmost point (4) adjacent L utmost point (2), and two L utmost points (2) of keeping away from N utmost point (4) are provided with first operating device (21).

10. A circuit breaker as claimed in claim 8, wherein: the shell is provided with at least two indicating windows (17), and the indicating windows (17) respectively and correspondingly indicate the opening and closing states of the first operating mechanism (21) and the second operating mechanism (22).

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