CN113972106B

CN113972106B - Circuit breaker

Info

Publication number: CN113972106B
Application number: CN202010725221.0A
Authority: CN
Inventors: 潘万军; 陈闯; 乔嗣健
Original assignee: Shanghai Liangxin Electrical Co Ltd
Current assignee: Shanghai Liangxin Electrical Co Ltd
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2024-08-13
Anticipated expiration: 2040-07-24
Also published as: CN113972106A

Abstract

The invention discloses a circuit breaker, and relates to the field of electricity. The circuit breaker comprises a wire inlet end, a wire outlet end, a first fixed contact, a second fixed contact, a first moving contact and a second moving contact. The wire inlet end is respectively and electrically connected with the first moving contact and the second moving contact, the wire outlet end is respectively and electrically connected with the first fixed contact and the second fixed contact, the first moving contact is used for being folded or separated from the first fixed contact, the second moving contact is used for being folded or separated from the second fixed contact, and the first contact assembly formed by connecting the first moving contact and the first fixed contact is connected in parallel with the second contact assembly formed by connecting the second moving contact and the second fixed contact. Compared with the prior art, the circuit breaker provided by the invention has the advantages that the first contact assembly formed by connecting the first moving contact and the first fixed contact and the second contact assembly formed by connecting the second moving contact and the second fixed contact are connected in parallel during closing, so that rated load current is increased, the application range is wide, and the practicability is strong.

Description

Circuit breaker

Technical Field

The invention relates to the field of electricity, in particular to a circuit breaker.

Background

A circuit breaker refers to a switching device capable of closing, carrying and opening a current under normal circuit conditions and closing, carrying and opening a current under abnormal circuit conditions within a prescribed time. At present, a circuit breaker is mostly provided with only one-phase circuit or multi-phase series circuit, and the circuit breaker is switched on or off by closing or separating a moving contact and a fixed contact so as to conduct or cut off the circuit. However, in this way, the rated load current of the circuit breaker is small, resulting in a small application range of the circuit breaker.

In view of this, it is particularly important to design and manufacture a circuit breaker with a high rated load current, especially in the electrical field.

Disclosure of Invention

The invention aims to provide a circuit breaker which can increase rated load current, and has wide application range and strong practicability.

The invention is realized by adopting the following technical scheme.

The circuit breaker comprises a wire inlet end, a wire outlet end, a first fixed contact, a second fixed contact, a first moving contact and a second moving contact, wherein the wire inlet end is respectively and electrically connected with the first moving contact and the second moving contact, the wire outlet end is respectively and electrically connected with the first fixed contact and the second fixed contact, the first moving contact is used for being folded or separated from the first fixed contact, the second moving contact is used for being folded or separated from the second fixed contact, and a first contact assembly formed by connecting the first moving contact and the first fixed contact is connected in parallel with a second contact assembly formed by connecting the second moving contact and the second fixed contact.

Further, the circuit breaker further comprises a thermal trip, one end of the thermal trip is electrically connected with the wire inlet end, and the other end of the thermal trip is electrically connected with the first moving contact and the second moving contact respectively.

Further, the thermal trip device comprises a first patch board, a first conductive board, a second patch board and a second conductive board, wherein the wire inlet end is respectively electrically connected with the first patch board and the second patch board, the first patch board is electrically connected with the first movable contact through the first conductive board, and the second patch board is electrically connected with the second movable contact through the second conductive board.

Further, the thermal trip device further comprises a supporting plate, a thermal deformation piece and a traction rod, wherein the supporting plate is arranged on the first conductive plate, one end of the thermal deformation piece is fixedly connected to the supporting plate, the other end of the thermal deformation piece is connected with the traction rod, the traction rod is used for driving the trip mechanism to trip when the thermal deformation piece generates thermal deformation, and the first conductive plate is respectively and electrically connected with the first moving contact and the second moving contact through the thermal deformation piece.

Further, the circuit breaker further comprises an electromagnetic release, one end of the electromagnetic release is electrically connected with the wire outlet end, and the other end of the electromagnetic release is electrically connected with the first fixed contact and the second fixed contact respectively.

Further, the electromagnetic release comprises a shell, a third conducting plate and a fourth conducting plate, wherein the third conducting plate and the fourth conducting plate are arranged in the shell, one end of the third conducting plate is electrically connected with the wire outlet end, the other end of the third conducting plate is electrically connected with the first static contact, one end of the fourth conducting plate is electrically connected with the wire outlet end, and the other end of the fourth conducting plate is electrically connected with the second static contact.

Further, the electromagnetic release further comprises an armature, a magnetic yoke and a torsion spring, wherein the armature is rotationally connected to the third conducting plate and is arranged at intervals with the magnetic yoke, the magnetic yoke is fixedly connected to the fourth conducting plate, the torsion spring is installed in the shell and abuts against the armature, the magnetic yoke can absorb the armature when the fourth conducting plate passes through a current larger than a preset value, so that the armature overcomes the elastic force of the torsion spring and rotates relative to the third conducting plate, and the armature is used for driving the release mechanism to release.

Further, the electromagnetic release further comprises a rivet and a rotating shaft, the armature and the magnetic yoke are U-shaped, the armature is arranged outside the third conducting plate in a surrounding mode, the magnetic yoke is arranged outside the fourth conducting plate in a surrounding mode, the magnetic yoke is fixedly connected with the fourth conducting plate through the rivet, the rotating shaft sequentially penetrates through the armature, the third conducting plate and the magnetic yoke, the armature can rotate relative to the rotating shaft, and the rotating shaft is used for limiting the magnetic yoke.

Further, the circuit breaker still includes tripping device and two movable contact springs, and tripping device includes first hasp subassembly and second hasp subassembly, and first movable contact installs on first hasp subassembly, and is connected with a movable contact spring, and the second movable contact is installed on second hasp subassembly, and is connected with another movable contact spring, and the movable contact spring can drive first movable contact and first stationary contact separation when first hasp subassembly is tripped, and the movable contact spring can also drive second movable contact and second stationary contact separation when second hasp subassembly is tripped.

Further, the tripping mechanism further comprises a tripping piece, the tripping piece is connected with the first locking component and the second locking component respectively, and the tripping piece is used for simultaneously driving the first locking component and the second locking component to trip under the action of the electromagnetic tripping device.

Further, first hasp subassembly includes first hasp, first jump knot and first support, first hasp and first jump knot snap fit, and all rotate and connect on first support, first support and first moving contact rotate and be connected, second hasp subassembly includes second hasp, second jump knot and second support, second hasp and second jump knot snap fit, and all rotate and connect on the second support, second support and second moving contact rotate and be connected, the release sets up between first hasp and second hasp, first hasp, release and second hasp all can rotate along the same axis, the release supports with first hasp and second hasp respectively.

Further, the tripping mechanism further comprises a linkage shaft, the first lock catch is provided with a first pipe body, the second lock catch is provided with a second pipe body, the first pipe body and the second pipe body are coaxially arranged, the inner diameter of the first pipe body is smaller than that of the second pipe body, one end of the linkage shaft stretches into the first pipe body and is matched with the first pipe body, the other end of the linkage shaft stretches into the second pipe body and is arranged at intervals with the inner wall of the second pipe body, the first pipe body and the second pipe body are propped against the tripping piece, the linkage shaft is arranged at intervals with the tripping piece, the first lock catch is used for being connected with the thermal trip, the first lock catch can rotate under the driving of the thermal trip to trip, and the first lock catch can drive the second lock catch to rotate to trip through the linkage shaft in the tripping process.

Further, the circuit breaker further comprises a shell and an operating mechanism, wherein the operating mechanism is arranged in the shell and can move relative to the shell, and the operating mechanism is connected with the first lock catch assembly and the second lock catch assembly respectively so as to synchronously drive the first lock catch assembly and the second lock catch assembly to rotate, and further synchronously drive the first contact assembly and the second contact assembly to open or close.

Further, operating device includes button, first drive assembly and second drive assembly, and the spout has been seted up to the shell, and the button slides and sets up in the spout, and the button is connected with first drive assembly and second drive assembly respectively, and first drive assembly is connected with first hasp subassembly, and second drive assembly is connected with second hasp subassembly.

Further, be provided with first waist type hole and second waist type hole side by side on the button, first drive assembly includes first U-shaped connecting rod, first handle and second U-shaped connecting rod, first waist type hole is stretched into to the one end of first U-shaped connecting rod, and can slide for first waist type hole, the other end and the first handle of first U-shaped connecting rod rotate to be connected, the one end and the first handle of second U-shaped connecting rod rotate to be connected, the other end is connected with first hasp subassembly, second drive assembly includes the third U-shaped connecting rod, second handle and fourth U-shaped connecting rod, the one end of third U-shaped connecting rod stretches into the second waist type hole, and can slide for the second waist type hole, the other end and the second handle of third U-shaped connecting rod rotate to be connected, the one end and the second handle of fourth U-shaped connecting rod rotate to be connected, the other end and second hasp subassembly are connected.

Further, the circuit breaker further comprises an arc extinguishing mechanism, the arc extinguishing mechanism comprises an arc extinguishing grid sheet group, a first arc striking groove and a second arc striking groove are arranged on the arc extinguishing grid sheet group at intervals, the position of the first arc striking groove corresponds to the contact position of the first moving contact and the first fixed contact, and the position of the second arc striking groove corresponds to the contact position of the second moving contact and the second fixed contact.

Further, the arc extinguishing grid sheet group comprises a plurality of arc extinguishing grid sheets, the arc extinguishing grid sheets are overlapped, the edges of the arc extinguishing grid sheets are provided with first arc striking notches and second arc striking notches at intervals, the first arc striking notches are sequentially communicated to form a first arc striking groove, and the second arc striking notches are sequentially communicated to form a second arc striking groove.

Further, the arc extinguishing mechanism further comprises a first arc guide plate, a first arc striking plate, a second arc guide plate and a second arc striking plate, the arc extinguishing grid sheet group is clamped between the first arc guide plate and the first arc striking plate, the positions of the first arc guide plate and the first arc striking plate correspond to the positions of the first arc striking grooves, the arc extinguishing grid sheet group is clamped between the second arc guide plate and the second arc striking plate, and the positions of the second arc guide plate and the second arc striking plate correspond to the positions of the second arc striking grooves.

The circuit breaker provided by the invention has the following beneficial effects:

According to the circuit breaker provided by the invention, the incoming line end is respectively and electrically connected with the first moving contact and the second moving contact, the outgoing line end is respectively and electrically connected with the first fixed contact and the second fixed contact, the first moving contact is used for being folded or separated from the first fixed contact, the second moving contact is used for being folded or separated from the second fixed contact, and the first contact assembly formed by connecting the first moving contact with the first fixed contact is connected in parallel with the second contact assembly formed by connecting the second moving contact with the second fixed contact. Compared with the prior art, the circuit breaker provided by the invention adopts the first moving contact and the second moving contact which are respectively connected with the incoming line end and the first fixed contact and the second fixed contact which are respectively connected with the outgoing line end, so that the first contact component formed by connecting the first moving contact and the first fixed contact and the second contact component formed by connecting the second moving contact and the second fixed contact are connected in parallel during closing, the rated load current is increased, the application range is wide, and the practicability is strong.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a circuit diagram of a circuit breaker according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a circuit breaker according to an embodiment of the present invention;

Fig. 3 is a schematic structural view of a connection between a thermal trip and a trip mechanism in a circuit breaker according to an embodiment of the present invention;

Fig. 4 is a schematic structural view of another view of the connection between the thermal trip and the trip mechanism in the circuit breaker according to the embodiment of the present invention;

Fig. 5 is a schematic structural diagram of an electromagnetic trip unit installed in a casing in a circuit breaker according to an embodiment of the present invention;

Fig. 6 is a schematic structural diagram of an electromagnetic trip unit in a circuit breaker according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of another view angle of the electromagnetic trip unit in the circuit breaker according to the embodiment of the present invention;

fig. 8 is a schematic structural diagram of a view angle of a trip mechanism in a circuit breaker according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of another view of the trip mechanism in the circuit breaker according to the embodiment of the present invention;

FIG. 10 is a schematic structural view of the release fastener of FIG. 8;

fig. 11 is a schematic structural view of a trip mechanism installed in a casing in a circuit breaker according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of connection between an operating mechanism and a trip mechanism in a circuit breaker according to an embodiment of the present invention;

FIG. 13 is a schematic view of the structure of the button of FIG. 12;

Fig. 14 is a schematic structural view of an operating mechanism installed in a casing in a circuit breaker according to an embodiment of the present invention;

Fig. 15 is a schematic structural diagram of an arc extinguishing mechanism in a circuit breaker according to an embodiment of the present invention;

Fig. 16 is a schematic view of the arc chute assembly of fig. 15.

Icon: a 100-circuit breaker; 110-wire inlet end; 120-wire outlet end; 130-a first stationary contact; 140-a second fixed contact; 150-a first moving contact; 160-a second moving contact; 170-thermal trip; 171-a first patch board; 172-a first conductive plate; 173-a second patch board; 174-a second conductive plate; 175-a support plate; 176-heat deformable member; 177-a drawbar; 178-adjusting screw; 1791-first wire; 1792-second wire; 1793-third wire; 1794-fourth wire; 180-electromagnetic release; 181-a housing; 182-a third conductive plate; 183-fourth conductive plates; 184-armature; 1841-a limit boss; 1842-receiving slots; 1843-first pole face; 185-yoke; 1851-a second pole face; 186-torsion spring; 187-rivets; 188-rotating shaft; 189-air gap; 190-trip mechanism; 191-a first latch assembly; 1911-first catch; 1912-first jump button; 1913-first scaffold; 1914-a first tube; 1915-grooves; 192-a second latch assembly; 1921-a second latch; 1922-second jump button; 1923-a second scaffold; 1924-a second tube; 193-release fastener; 1931-rotating the body; 1932-action boss; 1933-linkage boss; 1934-positioning boss; 194-linkage shafts; 200-a housing; 201-a limit groove; 202-a chute; 203-a boss; 210-an operating mechanism; 211-buttons; 2111-a first waist-shaped hole; 2112-second waist-shaped hole; 2113-button housing; 2114-indicator; 21141-first indicator face; 21142-second indicator surface; 2115-first stop plate; 2116-second stop plate; 2117—accommodating the cavity; 2118—viewing window; 212-a first transmission assembly; 2121-a first U-shaped link; 2122-a first handle; 2123-a second U-shaped link; 213-a second transmission assembly; 2131-a third U-shaped link; 2132-a second handle; 2133-fourth U-shaped link; 220-arc extinguishing mechanism; 221-arc extinguishing grid plate group; 2211—a first arc striking slot; 2212-a second arc striking groove; 2213-arc extinguishing grid plate; 2214-first arc striking notch; 2215-second arc striking notch; 222-a first arc guide plate; 223-a first striking plate; 224-a second arc guide plate; 225-a second striking plate; 230-movable contact spring.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "inner", "outer", "upper", "lower", "horizontal", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Some embodiments of the present invention are described in detail below with reference to the accompanying drawings. Features of the embodiments described below may be combined with each other without conflict.

Examples

Referring to fig. 1 and 2 in combination, an embodiment of the present invention provides a circuit breaker 100 for implementing on or off of a circuit. The high-voltage power supply can increase rated load current, and has wide application range and strong practicability. In this embodiment, the circuit breaker 100 includes two parallel circuits, and the parallel circuits can carry a larger current without tripping the circuit breaker 100, so as to increase the rated load current and expand the application range. However, the present invention is not limited thereto, and in other embodiments, the circuit breaker 100 may include a three-phase parallel circuit, and the circuit breaker 100 may also include a four-phase parallel circuit, and the number of circuit phases in the circuit breaker 100 is not particularly limited.

The circuit breaker 100 includes an incoming line end 110, an outgoing line end 120, a first stationary contact 130, a second stationary contact 140, a first moving contact 150, a second moving contact 160, a thermal trip 170, an electromagnetic trip 180, a trip mechanism 190, a housing 200, an operating mechanism 210, an arc extinguishing mechanism 220, and two moving contact springs 230. The inlet terminal 110, the outlet terminal 120, the first fixed contact 130, the second fixed contact 140, the first moving contact 150, the second moving contact 160, the thermal trip 170, the electromagnetic trip 180, the trip mechanism 190, the operating mechanism 210, the arc extinguishing mechanism 220, and the two moving contact springs 230 are all installed in the housing 200. The wire inlet end 110 and the wire outlet end 120 are both used for wiring, the first moving contact 150 is used for being folded or separated from the first fixed contact 130, and the second moving contact 160 is used for being folded or separated from the second fixed contact 140. Both the thermal trip 170 and the electromagnetic trip 180 are configured to connect to the trip mechanism 190 to trip the trip mechanism 190 in the event of a circuit fault such as a severe overload or short circuit. The two movable contact springs 230 are respectively connected with the first movable contact 150 and the second movable contact 160, so as to drive the first movable contact 150 to be separated from the first fixed contact 130 and drive the second movable contact 160 to be separated from the second fixed contact 140 when the tripping mechanism 190 trips. The operation mechanism 210 is used for being connected with the tripping mechanism 190, a user can drive the tripping mechanism 190 to trip or close and buckle through the operation mechanism 210, and the arc extinguishing mechanism 220 is used for removing an arc generated when the first moving contact 150 is separated from the first fixed contact 130 and an arc generated when the second moving contact 160 is separated from the second fixed contact 140.

It should be noted that the wire inlet 110 is electrically connected to the first moving contact 150 and the second moving contact 160, the wire outlet 120 is electrically connected to the first fixed contact 130 and the second fixed contact 140, the first moving contact 150 is used for being folded or separated from the first fixed contact 130, and the second moving contact 160 is used for being folded or separated from the second fixed contact 140. The first contact assembly formed by connecting the first moving contact 150 and the first fixed contact 130 is connected in parallel with the second contact assembly formed by connecting the second moving contact 160 and the second fixed contact 140. When the circuit breaker 100 is in a closing state, the wire inlet end 110 is electrically connected with the wire outlet end 120 through the first moving contact 150 and the first fixed contact 130 in sequence to form a first circuit, the wire inlet end 110 is electrically connected with the wire outlet end 120 through the second moving contact 160 and the second fixed contact 140 in sequence to form a second circuit, and the first circuit is connected with the second circuit in parallel to increase rated load current of the circuit breaker 100.

Referring to fig. 3 and fig. 4, it should be noted that one end of the thermal trip 170 is electrically connected to the incoming line end 110, the other end is electrically connected to the first moving contact 150 and the second moving contact 160, and the current input by the incoming line end 110 enters the first moving contact 150 and the second moving contact 160 through the thermal trip 170, and flows to the outgoing line end 120 through the first fixed contact 130 and the second fixed contact 140.

The thermal trip 170 includes a first patch panel 171, a first conductive plate 172, a second patch panel 173, a second conductive plate 174, a support plate 175, a thermal deformation member 176, and a traction lever 177. The wire inlet 110 is electrically connected to a first patch board 171 and a second patch board 173, respectively, the first patch board 171 is electrically connected to the first moving contact 150 through a first conductive board 172, and the second patch board 173 is electrically connected to the second moving contact 160 through a second conductive board 174. Specifically, the wire inlet 110 is a wire insertion row, and the wire insertion row is simultaneously inserted into the first wire insertion board 171 and the second wire insertion board 173, so as to realize the parallel connection of the first wire insertion board 171 and the second wire insertion board 173. The first patch board 171 is fixedly connected with the first conductive board 172, and the second patch board 173 is fixedly connected with the second conductive board 174, so as to improve the connection strength of the thermal trip 170. The first conductive plate 172 is connected to the first moving contact 150 through a first wire 1791, and the second conductive plate 174 is connected to the second moving contact 160 through a second wire 1792, so as to realize the energization of the first moving contact 150 and the second moving contact 160.

In this embodiment, the supporting plate 175 is mounted on the first conductive plate 172, one end of the thermal deformation member 176 is fixedly connected to the supporting plate 175, the other end is connected to the traction rod 177, the supporting plate 175 is used for limiting the thermal deformation member 176, the traction rod 177 is used for driving the trip mechanism 190 to trip when the thermal deformation member 176 generates thermal deformation, so that the circuit breaker 100 trips, i.e. the first moving contact 150 is separated from the first fixed contact 130, and the second moving contact 160 is separated from the second fixed contact 140. The first conductive plate 172 is electrically connected to the first moving contact 150 and the second moving contact 160 through the thermal deformation member 176, respectively, so that the thermal deformation member 176 is connected to the first circuit in parallel and to the second circuit.

Specifically, the support plate 175 is fixedly connected to the first conductive plate 172 through an adjustment screw 178, and a through hole (not shown) is formed in the housing 200, the position of the through hole corresponds to the position of the adjustment screw 178, and a user can adjust the adjustment screw 178 through the through hole using a screwdriver. One end of the heat deformation member 176 is connected to the first conductive plate 172 through a third wire 1793, and the other end is connected to the first moving contact 150 and the second moving contact 160 through a fourth wire 1794, respectively, to achieve energization of the heat deformation member 176. The traction rod 177 is in a bending shape, one end of the traction rod 177 is propped against the thermal deformation piece 176, the other end of the traction rod 177 is connected with the tripping mechanism 190, and the traction rod 177 can move under the driving of the thermal deformation piece 176 to drive the tripping mechanism 190 to trip.

In this embodiment, the thermal deformation member 176 is a rectangular strip-shaped bimetallic strip, and the bimetallic strip is relatively provided with an active layer and a passive layer, and the thermal deformation degree of the active layer is greater than that of the passive layer. When the thermal deformation member 176 is electrified, the resistor therein works and heats, and when the current passing through the thermal deformation member 176 is too large, the temperature of the thermal deformation member 176 exceeds a preset value, so that the whole thermal deformation member 176 bends and deforms towards the direction close to the first conductive plate 172, thereby pushing the traction rod 177 to move and further enabling the tripping mechanism 190 to trip; when the temperature of the thermally deformable member 176 decreases, the thermally deformable member 176 returns to its original state, and the traction lever 177 returns to its original state, thereby generating no force on the trip mechanism 190.

In practical application, the thermal deformation member 176 is electrically connected to the first moving contact 150 and the second moving contact 160, the current flowing in the thermal deformation member 176 is proportional to the total current flowing through the first moving contact 150 and the second moving contact 160, no matter whether the contact resistances of the first moving contact 150 and the second moving contact 160 are the same, the thermal deformation member 176 can have stable current passing through, and the problem of unbalanced current is avoided, so that the trip mechanism 190 is ensured not to jump early under the action of the thermal deformation member 176.

Referring to fig. 5, fig. 6, and fig. 7, it should be noted that one end of the electromagnetic trip device 180 is electrically connected to the wire outlet 120, and the other end is electrically connected to the first fixed contact 130 and the second fixed contact 140 respectively. The current input by the wire inlet end 110 enters the first fixed contact 130 through the first movable contact 150, and then flows to the wire outlet end 120 through the electromagnetic release 180; the current input by the wire inlet end 110 enters the second fixed contact 140 through the second movable contact 160, and then flows to the wire outlet end 120 through the electromagnetic release 180.

Electromagnetic release 180 includes a housing 181, a third conductive plate 182, a fourth conductive plate 183, an armature 184, a yoke 185, a torsion spring 186, a rivet 187, and a shaft 188. The third conductive plate 182 and the fourth conductive plate 183 are disposed in the housing 181, one end of the third conductive plate 182 is electrically connected to the wire outlet 120, the other end is electrically connected to the first fixed contact 130, one end of the fourth conductive plate 183 is electrically connected to the wire outlet 120, and the other end is electrically connected to the second fixed contact 140. Specifically, the third conductive plate 182 and the fourth conductive plate 183 are disposed at a side-by-side interval, and a current can pass through the first stationary contact 130 and the third conductive plate 182 in sequence into the wire outlet terminal 120, and a current can also pass through the second stationary contact 140 and the fourth conductive plate 183 in sequence into the wire outlet terminal 120.

In this embodiment, the armature 184 is rotatably connected to the third conductive plate 182 and is spaced apart from the yoke 185, with an air gap 189 being formed between the armature 184 and the yoke 185. The magnetic yoke 185 is fixedly connected to the fourth conductive plate 183, the torsion spring 186 is installed in the housing 181 and abuts against the armature 184, the magnetic yoke 185 can absorb the armature 184 when the current passing through the fourth conductive plate 183 is greater than a preset value, so that the armature 184 overcomes the elastic force of the torsion spring 186 and rotates relative to the third conductive plate 182, and the armature 184 is used for driving the tripping mechanism 190 to trip. Specifically, the armature 184 is provided with a limiting boss 1841, the limiting boss 1841 is provided with a holding groove 1842, the torsion spring 186 has two holding arms, one holding arm is held or fixedly connected with the housing 181, the other holding arm is disposed in the holding groove 1842, and can apply holding force to the limiting boss 1841, the holding groove 1842 is used for limiting the holding arm so as to prevent the holding arm from falling out of the holding groove 1842.

In this embodiment, the armature 184 and the yoke 185 are both U-shaped, the armature 184 is disposed around the third conductive plate 182, and the yoke 185 is disposed around the fourth conductive plate 183 and extends into the third conductive plate 182. The yoke 185 is fixedly coupled to the fourth conductive plate 183 by rivets 187 to fix the relative position of the yoke 185. A rotation shaft 188 passes through the armature 184, the third conductive plate 182 and the yoke 185 in sequence, the armature 184 being rotatable relative to the rotation shaft 188, the rotation shaft 188 being adapted to define the relative positions of the armature 184 and the yoke 185 to maintain a stable air gap 189 between the armature 184 and the yoke 185.

The armature 184 is provided with a first magnetic pole surface 1843, the yoke 185 is provided with a second magnetic pole surface 1851, the first magnetic pole surface 1843 is spaced apart from the second magnetic pole surface 1851, and the air gap 189 is provided between the first magnetic pole surface 1843 and the second magnetic pole surface 1851. When the passing current of the fourth conductive plate 183 is greater than a preset value, the magnetic yoke 185 applies a larger magnetic attraction force to the armature 184, so that the armature 184 rotates relative to the rotating shaft 188 against the elastic force of the torsion spring 186, and the first magnetic pole face 1843 is attached to the second magnetic pole face 1851, so that the armature 184 pushes the tripping mechanism 190 to trip; when the passing current of the fourth conductive plate 183 decreases to a normal range, the magnetic attraction force applied to the armature 184 by the yoke 185 decreases or disappears, and the torsion spring 186 drives the armature 184 to rotate relative to the rotating shaft 188 under the action of its own elastic force, so that the first magnetic pole face 1843 is separated from the second magnetic pole face 1851, and the armature 184 no longer generates an acting force on the trip mechanism 190.

In this embodiment, the first magnetic pole surface 1843 and the second magnetic pole surface 1851 are both disposed obliquely, the moving direction of the armature 184 is the same as or opposite to the current direction of the third conductive plate 182, and the cross-sectional area of the armature 184 in the moving direction is small to reduce air resistance, so that the armature 184 can realize instantaneous movement, thereby realizing accurate tripping.

Referring to fig. 8, 9, 10 and 11, the trip mechanism 190 includes a first latch assembly 191, a second latch assembly 192, a trip unit 193 and a linkage shaft 194. The first moving contact 150 is mounted on the first latch assembly 191 and connected to a moving contact spring 230, and the first moving contact 150 can rotate relative to the first latch assembly 191. The second moving contact 160 is mounted on the second latch assembly 192 and is connected to another moving contact spring 230, and the second moving contact 160 can rotate relative to the second latch assembly 192. One end of the movable contact spring 230, which is far away from the first movable contact 150 or the second movable contact 160, is connected with the housing 200, the movable contact spring 230 can drive the first movable contact 150 to be separated from the first fixed contact 130 when the first locking component 191 is tripped, and the movable contact spring 230 can also drive the second movable contact 160 to be separated from the second fixed contact 140 when the second locking component 192 is tripped. Specifically, the thermal trip 170 can drive the first latch assembly 191 and the second latch assembly 192 to trip, and the electromagnetic trip 180 can also drive the first latch assembly 191 and the second latch assembly 192 to trip, so as to realize tripping of the circuit breaker 100.

In this embodiment, the trip piece 193 is disposed between the first latch component 191 and the second latch component 192, and the trip piece 193 is connected to the first latch component 191 and the second latch component 192 respectively, and the trip piece 193 is used for driving the first latch component 191 and the second latch component 192 to trip simultaneously under the action of the electromagnetic trip 180. The linkage shaft 194 is connected between the first latch assembly 191 and the second latch assembly 192 to step by step drive the first latch assembly 191 and the second latch assembly 192 to perform a releasing action.

The first latch assembly 191 includes a first latch 1911, a first trip 1912, and a first bracket 1913. The first lock 1911 is snap-fitted with the first jump buckle 1912, and both are rotatably connected to the first support 1913, and the first support 1913 is rotatably connected to the first moving contact 150. The trip piece 193 can drive the first lock catch 1911 to move, so that the first lock catch 1911 and the first trip buckle 1912 are in release fit, and the trip action of the first lock catch assembly 191 is completed, so that the first moving contact 150 is separated from the first fixed contact 130 under the action of the moving contact spring 230, and further the trip of the circuit breaker 100 is realized.

The second latch assembly 192 includes a second latch 1921, a second snap fit 1922, and a second bracket 1923. The second latch 1921 is snap-fit with the second latch 1922, and both are rotatably connected to the second bracket 1923, and the second bracket 1923 is rotatably connected to the second moving contact 160. The trip piece 193 can drive the second latch 1921 to move, so that the second latch 1921 and the second trip buckle 1922 are in release fit, and the trip action of the second latch assembly 192 is completed, so that the second moving contact 160 is separated from the second fixed contact 140 under the action of the moving contact spring 230, and further the trip of the circuit breaker 100 is realized.

It is noted that the first latch 1911 and the second latch 1921 are disposed side by side, the trip member 193 is disposed between the first latch 1911 and the second latch 1921, and the first latch 1911, the trip member 193, and the second latch 1921 can all rotate along the same axis, that is, the rotation centers of the first latch 1911, the trip member 193, and the second latch 1921 are all the axis. The disengaging piece 193 is respectively abutted against the first lock catch 1911 and the second lock catch 1921, the disengaging piece 193 is abutted against the armature 184 of the electromagnetic release 180, and the armature 184 can drive the disengaging piece 193 to rotate along the axis so as to drive the first lock catch 1911 and the second lock catch 1921 to rotate along the axis at the same time, so that the disengaging action of the first lock catch assembly 191 and the second lock catch assembly 192 is synchronously realized.

The disengagement member 193 includes a rotating body 1931, an actuation boss 1932, a linkage boss 1933, and a positioning boss 1934. The action boss 1932 and the linkage boss 1933 are disposed at intervals and are fixedly connected to the peripheral surface of the rotating body 1931, and the rotating body 1931 can simultaneously drive the action boss 1932 and the linkage boss 1933 to rotate in the process of rotating along the axis of the rotating body 1931. In this embodiment, the rotating body 1931, the motion boss 1932 and the linkage boss 1933 are integrally formed, so as to improve the connection strength. The linkage boss 1933 is respectively abutted against the first lock catch 1911 and the second lock catch 1921, the action boss 1932 is used for abutting against the electromagnetic release 180, and the electromagnetic release 180 can drive the rotating body 1931 to rotate through the action boss 1932, so that the rotating body 1931 drives the first lock catch 1911 and the second lock catch 1921 to rotate through the linkage boss 1933, and the first lock catch assembly 191 and the second lock catch assembly 192 are released.

In this embodiment, the positioning boss 1934 is fixedly connected to the circumferential surface of the rotating body 1931, the positioning boss 1934 is configured to cooperate with the limiting groove 201 disposed in the housing 200, the positioning boss 1934 can move in the limiting groove 201, and the limiting groove 201 can limit the positioning boss 1934, so as to prevent the disengagement member 193 from being offset or tilting during rotation. Specifically, the positioning boss 1934 is arc-shaped, the positioning boss 1934 and the rotating body 1931 are coaxially disposed, the limiting groove 201 is arc-shaped, the curvature of the positioning boss 1934 is identical to that of the limiting groove 201, when the trip 193 rotates, the positioning boss 1934 rotates in the limiting groove 201, and two side walls of the limiting groove 201 can limit the positioning boss 1934.

In this embodiment, the first latch 1911 is provided with a first tube 1914, the second latch 1921 is provided with a second tube 1924, the first tube 1914 and the second tube 1924 are both abutted against the linkage boss 1933, and the trip member 193 simultaneously applies a force to the first tube 1914 and the second tube 1924 under the action of the electromagnetic trip 180, so that the first latch 1911 and the second latch 1921 rotate synchronously along an axis, thereby realizing synchronous tripping of the first latch assembly 191 and the second latch assembly 192. Specifically, the first tube 1914 and the second tube 1924 are coaxially disposed and each disposed in parallel spaced relation to the axis of the rotating body 1931. The first tube 1914 can keep close contact with the linkage boss 1933 all the time in the process of rotating the first lock 1911, so as to ensure that the first lock 1911 rotates in place; the second tube 1924 can maintain close contact with the linkage projection 1933 all the time during rotation of the second latch 1921 to ensure that the second latch 1921 rotates in place.

The inner diameter of the first pipe body 1914 is smaller than the inner diameter of the second pipe body 1924, one end of the linkage shaft 194 extends into the first pipe body 1914 and cooperates with the first pipe body 1914, and the other end of the linkage shaft 194 extends into the second pipe body 1924 and is disposed at an interval from the inner wall of the second pipe body 1924. The first pipe body 1914 and the second pipe body 1924 are propped against the linkage boss 1933 of the tripping piece 193, the linkage shaft 194 is arranged at intervals with the linkage boss 1933 of the tripping piece 193, the first lock catch 1911 is used for being connected with the thermal tripping device 170, the first lock catch 1911 can rotate and trip under the driving of the thermal tripping device 170, and the first lock catch 1911 can drive the second lock catch 1921 to rotate and trip through the linkage shaft 194 in the tripping process so as to realize the grading trip of the first lock catch component 191 and the second lock catch component 192.

In this embodiment, the first latch 1911 is provided with a groove 1915, the groove 1915 is in an arc shape, and an end of the pulling rod 177 of the thermal release 170, which is far away from the thermal deformation 176, extends into the groove 1915 and abuts against an end wall of the groove 1915. The traction rod 177 can drive the first lock catch 1911 to rotate along the axial direction thereof through the groove 1915 under the deformation action of the thermal deformation member 176, so that the first lock catch assembly 191 is tripped, and the groove 1915 can limit the traction rod 177 to prevent the traction rod 177 from falling out of the groove 1915.

It should be noted that the circuit breaker 100 has two tripping modes, namely, an electromagnetic tripping mode of the electromagnetic trip 180 and a thermal tripping mode of the thermal trip 170. When the circuit breaker 100 performs electromagnetic tripping, the electromagnetic tripping device 180 pushes the tripping piece 193 to rotate, and the tripping piece 193 synchronously drives the first lock catch 1911 and the second lock catch 1921 to rotate, so that the first lock catch assembly 191 and the second lock catch assembly 192 realize synchronous tripping. When the circuit breaker 100 performs thermal tripping, the thermal trip 170 drives the first lock catch 1911 to rotate, the process is divided into two stages, in the first stage, the first pipe body 1914 drives the linkage shaft 194 to move in the second pipe body 1924, at this time, since the linkage shaft 194 is arranged at intervals with the inner wall of the second pipe body 1924, no contact exists between the linkage shaft 194 and the second pipe body 1924, and the first lock catch 1911 realizes rotational tripping first; in the second stage, the linkage shaft 194 moves to a position abutting against the inner wall of the second pipe body 1924, and continues to move under the driving of the first pipe body 1914, and at this time, the linkage shaft 194 drives the second pipe body 1924 to rotate, so as to drive the second lock catch 1921 to rotate and trip, so that the first lock catch assembly 191 and the second lock catch assembly 192 realize graded tripping.

It should be noted that, during the electromagnetic trip of the circuit breaker 100, due to manufacturing errors, assembly dimensions, etc., the trip forces to which the first latch 1911 and the second latch 1921 are subjected during the trip may be equal or unequal. When the trip forces of the first latch 1911 and the second latch 1921 are equal, the first latch 1911 and the second latch 1921 trip completely synchronously, so that the trip sequence of the first latch 1911 and the second latch 1921 is independent of whether the current of the parallel circuit is balanced or not. When the tripping force of the first latch 1911 and the tripping force of the second latch 1921 are unequal, if the tripping force of the first latch 1911 is smaller than the tripping force of the second latch 1921, the first latch 1911 performs the tripping operation first, the second latch 1921 performs the tripping operation later, in this process, an arc is generated on the second moving contact 160, the arc burns the second moving contact 160, so that the over travel of the second moving contact 160 is reduced, the moving contact pressure is reduced, the tripping force of the second latch 1921 is reduced, so that the tripping force of the second latch 1921 is smaller than the tripping force of the first latch 1911, in the next tripping operation, the second latch 1921 performs the tripping operation first, the arc is generated on the first moving contact 150, the burning loss is caused on the first moving contact 150, the burning loss is repeated, so that the first moving contact 150 and the second moving contact 160 are frequently approached to each other, the tripping force of the second latch 1921 is smaller than the tripping force of the first latch 1911, and thus the current is always unbalanced, and the service life of the whole circuit is not balanced, and the whole circuit is not always broken, and the service life of the circuit is prolonged.

Referring to fig. 12, fig. 13 and fig. 14 in combination, it should be noted that the operation mechanism 210 can move relative to the housing 200, and the operation mechanism 210 is connected to the first latch assembly 191 and the second latch assembly 192 respectively to synchronously drive the first latch assembly 191 and the second latch assembly 192 to rotate, so as to synchronously drive the first contact assembly and the second contact assembly to open or close, that is, drive the first moving contact 150 to separate or close from the first fixed contact 130, and synchronously drive the second moving contact 160 to separate or close from the second fixed contact 140. Specifically, when the operating mechanism 210 extends into the housing 200, the circuit breaker 100 is in a closed state, and at this time, both the first circuit and the second circuit are turned on; when the operating mechanism 210 is retracted out of the housing 200, the circuit breaker 100 is in the open state, in which both the first and second circuits are open.

The operating mechanism 210 includes a button 211, a first transmission assembly 212, and a second transmission assembly 213. The housing 200 is provided with a chute 202, a button 211 is slidably provided in the chute 202, the button 211 is slidable with respect to the chute 202 toward the outside of the housing 200, and the button 211 is also slidable with respect to the chute 202 toward the inside of the housing 200. The button 211 is respectively connected with the first transmission component 212 and the second transmission component 213, the first transmission component 212 is connected with the first jump button 1912 of the first lock catch component 191, the second transmission component 213 is connected with the second jump button 1922 of the second lock catch component 192, and the button 211 can synchronously drive the first jump button 1912 and the second jump button 1922 to move through the first transmission component 212 and the second transmission component 213, so that the first lock catch component 191 and the second lock catch component 192 synchronously rotate, and the first contact component and the second contact component synchronously switch on and off.

In this embodiment, the button 211 is provided with a first waist-shaped hole 2111 and a second waist-shaped hole 2112, the first transmission assembly 212 is connected to the first waist-shaped hole 2111, and the second transmission assembly 213 is connected to the second waist-shaped hole 2112. Specifically, the first waist-shaped hole 2111 and the second waist-shaped hole 2112 have the same center line, and the projections of the first waist-shaped hole 2111 and the second waist-shaped hole 2112 on the plane perpendicular to the center line coincide, that is, the positions of the first waist-shaped hole 2111 and the second waist-shaped hole 2112 are aligned, and the sizes and the shapes are the same, so that the button 211 can synchronously drive the first transmission assembly 212 and the second transmission assembly 213 to move, and the first latch assembly 191 and the second latch assembly 192 can synchronously rotate, so that the safety is high, and the safety is stable and reliable.

First drive assembly 212 includes a first U-shaped link 2121, a first handle 2122, and a second U-shaped link 2123. One end of the first U-shaped link 2121 extends into the first waist-shaped hole 2111 and can slide relative to the first waist-shaped hole 2111, the other end of the first U-shaped link 2121 is rotatably connected with the first handle 2122, one end of the second U-shaped link 2123 is rotatably connected with the first handle 2122, and the other end is connected with the first jump buckle 1912 of the first latch assembly 191. During the closing process, the button 211 slides towards the inside of the casing 200, and the button 211 pushes the first handle 2122 to rotate towards the first direction through the first U-shaped connecting rod 2121, so that the first handle 2122 drives the first trip 1912 to rotate through the second U-shaped connecting rod 2123, and closing is completed; in the opening process, the button 211 slides towards the outside of the housing 200, the button 211 pulls the first handle 2122 to rotate towards a second direction through the first U-shaped connecting rod 2121, and the second direction is opposite to the first direction, so that the first handle 2122 drives the first trip 1912 to rotate reversely through the second U-shaped connecting rod 2123, and opening is completed.

The second transmission assembly 213 includes a third U-shaped link 2131, a second handle 2132 and a fourth U-shaped link 2133. One end of the third U-shaped link 2131 extends into the second waist-shaped hole 2112 and is capable of sliding relative to the second waist-shaped hole 2112, the other end of the third U-shaped link 2131 is rotatably connected to the second handle 2132, one end of the fourth U-shaped link 2133 is rotatably connected to the second handle 2132, and the other end is connected to the second jump buckle 1922 of the second latch assembly 192. During the closing process, the button 211 slides towards the inside of the casing 200, and the button 211 pushes the second handle 2132 to rotate towards the first direction through the third U-shaped connecting rod 2131, so that the second handle 2132 drives the second tripping button 1922 to rotate through the fourth U-shaped connecting rod 2133, and closing is completed; in the opening process, the button 211 slides towards the outside of the housing 200, the button 211 pulls the second handle 2132 to rotate towards the second direction through the third U-shaped link 2131, and the second direction is opposite to the first direction, so that the second handle 2132 drives the second trip buckle 1922 to rotate reversely through the fourth U-shaped link 2133, and the opening is completed.

The button 211 includes a button housing 2113 and an indicator 2114. Button shell 2113 slides and sets up in spout 202, and indicator 2114 installs in button shell 2113, and can rotate for button shell 2113 to show the status information of closing or opening, the user of being convenient for knows the divide-shut brake state of circuit breaker 100. In this embodiment, a first stop plate 2115 and a second stop plate 2116 are disposed in the button housing 2113 at intervals, the indicator 2114 is disposed between the first stop plate 2115 and the second stop plate 2116, and the first stop plate 2115 and the second stop plate 2116 are both used for limiting the indicator 2114 so as to limit the limit position of the indicator 2114, so that the indicator 2114 can accurately indicate the opening and closing state of the circuit breaker 100.

Specifically, a housing cavity 2117 is provided in the button housing 2113, and an indicator 2114 is mounted in the housing cavity 2117 and rotatable relative to the button housing 2113. The button housing 2113 is provided with an observation window 2118, and the position of the observation window 2118 corresponds to the position of the indicator 2114, so that the user can observe the state of the indicator 2114 through the observation window 2118. The inside of the chute 202 is provided with a boss 203, the boss 203 extends into the accommodating cavity 2117, and the boss 203 can drive the indicator 2114 to rotate when the button 211 slides relative to the chute 202, so that the indicator 2114 displays the state information of closing or opening in the observation window 2118.

In this embodiment, the indicator 2114 is provided with a first indicator surface 21141 and a second indicator surface 21142 adjacent to each other, and the first indicator surface 21141 is provided above the second indicator surface 21142. When the circuit breaker 100 is in the opening state, one end of the indicator 2114 abuts against the boss 203, the other end abuts against the second stop plate 2116 to limit the position of the indicator 2114, at this time, the position of the first indicator surface 21141 corresponds to the position of the observation window 2118, and the user can see the first indicator surface 21141 through the observation window 2118, so as to know that the circuit breaker 100 is in the opening state at this time; when the circuit breaker 100 is in the on state, one end of the indicator 2114 abuts against the boss 203, and the other end abuts against the first stop plate 2115 to define the position of the indicator 2114, at this time, the position of the second indicator surface 21142 corresponds to the position of the observation window 2118, and the user can see the second indicator surface 21142 through the observation window 2118, so that the circuit breaker 100 is known to be in the on state at this time. Specifically, the first indicating surface 21141 is a green surface, and the second indicating surface 21142 is a red surface for easy observation.

Referring to fig. 15 and 16 in combination, the arc extinguishing mechanism 220 includes an arc extinguishing grid group 221, a first arc guiding plate 222, a first arc striking plate 223, a second arc guiding plate 224 and a second arc striking plate 225. The arc extinguishing grid plate group 221 is provided with a first arc striking groove 2211 and a second arc striking groove 2212 at intervals, and the first arc striking groove 2211 and the second arc striking groove 2212 are arranged in parallel. The position of the first arc striking groove 2211 corresponds to the contact position of the first moving contact 150 and the first fixed contact 130, and the first arc striking groove 2211 is used for introducing and extinguishing an arc generated between the first moving contact 150 and the first fixed contact 130. The second arc striking groove 2212 corresponds to a contact position of the second moving contact 160 and the second fixed contact 140, and the second arc striking groove 2212 is used for introducing and extinguishing an arc generated between the second moving contact 160 and the second fixed contact 140.

Specifically, when an arc is generated between the first moving contact 150 and the first fixed contact 130, the arc enters the arc extinguishing gate sheet group 221 through the first arc striking groove 2211 under the action of the shrinkage force of magnetic force lines, and one long arc is divided into a plurality of sections of short arcs; when the current passes through zero, all short arcs are extinguished simultaneously. Similarly, when an arc is generated between the second moving contact 160 and the second fixed contact 140, the arc enters the arc extinguishing grid sheet group 221 through the second arc striking groove 2212 under the action of the contraction force of magnetic force lines, and one long arc is divided into a plurality of sections of short arcs; when the current passes through zero, all short arcs are extinguished simultaneously.

In this embodiment, the arc extinguishing grid plate set 221 is clamped between the first arc guiding plate 222 and the first arc striking plate 223, the positions of the first arc guiding plate 222 and the first arc striking plate 223 correspond to the positions of the first arc striking groove 2211, and the first arc guiding plate 222 is connected to one side of the third conductive plate 182 close to the first static contact 130. The arc extinguishing grid plate set 221 is clamped between the second arc guiding plate 224 and the second arc striking plate 225, the positions of the second arc guiding plate 224 and the second arc striking plate 225 correspond to the positions of the second arc striking groove 2212, and the second arc guiding plate 224 is connected with one side of the fourth conductive plate 183 close to the second static contact 140.

The arc chute sheet group 221 includes a plurality of arc chute sheets 2213. The plurality of arc extinguishing bars 2213 are arranged in an overlapping manner, and in this embodiment, the arc extinguishing bars 2213 are made of steel sheets. The arc extinguishing grid 2213 is provided with a first arc striking notch 2214 and a second arc striking notch 2215 at intervals, the first arc striking notches 2214 are sequentially communicated to form a first arc striking groove 2211, and the second arc striking notches 2215 are sequentially communicated to form a second arc striking groove 2212.

In the circuit breaker 100 provided in the embodiment of the present invention, the wire inlet end 110 is electrically connected to the first moving contact 150 and the second moving contact 160, the wire outlet end 120 is electrically connected to the first fixed contact 130 and the second fixed contact 140, the first moving contact 150 is used for folding or separating from the first fixed contact 130, the second moving contact 160 is used for folding or separating from the second fixed contact 140, and a first contact assembly formed by connecting the first moving contact 150 and the first fixed contact 130 is connected in parallel with a second contact assembly formed by connecting the second moving contact 160 and the second fixed contact 140. Compared with the prior art, the circuit breaker 100 provided by the invention adopts the first moving contact 150 and the second moving contact 160 which are respectively connected with the incoming line end 110 and the first fixed contact 130 and the second fixed contact 140 which are respectively connected with the outgoing line end 120, so that a first contact assembly formed by connecting the first moving contact 150 and the first fixed contact 130 and a second contact assembly formed by connecting the second moving contact 160 and the second fixed contact 140 are connected in parallel during switching on, thereby increasing rated load current, and the circuit breaker has wide application range and strong practicability.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The circuit breaker is characterized by comprising an incoming line end (110), an outgoing line end (120), a first fixed contact (130), a second fixed contact (140), a first moving contact (150) and a second moving contact (160), wherein the incoming line end (110) is electrically connected with the first moving contact (150) and the second moving contact (160) respectively, the outgoing line end (120) is electrically connected with the first fixed contact (130) and the second fixed contact (140) respectively, the first moving contact (150) is used for being folded or separated from the first fixed contact (130), the second moving contact (160) is used for being folded or separated from the second fixed contact (140), and a first contact assembly formed by connecting the first moving contact (150) with the first fixed contact (130) is connected with a second contact assembly formed by connecting the second moving contact (160) with the second fixed contact (140) in parallel;

The circuit breaker further comprises a tripping mechanism (190) and two movable contact springs (230), the tripping mechanism (190) comprises a first locking assembly (191) and a second locking assembly (192), the first movable contact (150) is mounted on the first locking assembly (191) and is connected with one movable contact spring (230), the second movable contact (160) is mounted on the second locking assembly (192) and is connected with the other movable contact spring (230), the movable contact spring (230) can drive the first movable contact (150) to be separated from the first fixed contact (130) when the first locking assembly (191) is tripped, and the movable contact spring (230) can also drive the second movable contact (160) to be separated from the second fixed contact (140) when the second locking assembly (192) is tripped;

The tripping mechanism (190) further comprises a tripping piece (193), the tripping piece (193) is respectively connected with the first locking component (191) and the second locking component (192), and the tripping piece (193) is used for simultaneously driving the first locking component (191) and the second locking component (192) to trip under the action of the electromagnetic tripping device (180);

The circuit breaker further comprises a shell (200) and an operating mechanism (210), wherein the operating mechanism (210) is arranged in the shell (200) and can move relative to the shell (200), and the operating mechanism (210) is respectively connected with the first lock catch assembly (191) and the second lock catch assembly (192) so as to synchronously drive the first lock catch assembly (191) and the second lock catch assembly (192) to rotate, so that the first contact assembly and the second contact assembly are synchronously driven to be opened or closed.

2. The circuit breaker according to claim 1, further comprising a thermal trip (170), one end of the thermal trip (170) being electrically connected to the incoming line end (110) and the other end being electrically connected to the first moving contact (150) and the second moving contact (160), respectively.

3. The circuit breaker of claim 2, wherein the thermal trip (170) comprises a first patch panel (171), a first conductive panel (172), a second patch panel (173), and a second conductive panel (174), the incoming end (110) is electrically connected to the first patch panel (171) and the second patch panel (173), respectively, the first patch panel (171) is electrically connected to the first moving contact (150) through the first conductive panel (172), and the second patch panel (173) is electrically connected to the second moving contact (160) through the second conductive panel (174).

4. A circuit breaker according to claim 3, wherein the thermal trip device (170) further comprises a support plate (175), a thermal deformation member (176) and a traction rod (177), the support plate (175) is mounted on the first conductive plate (172), one end of the thermal deformation member (176) is fixedly connected to the support plate (175), the other end is connected to the traction rod (177), the traction rod (177) is used for driving a trip mechanism (190) to trip when the thermal deformation member (176) generates thermal deformation, and the first conductive plate (172) is electrically connected with the first moving contact (150) and the second moving contact (160) through the thermal deformation member (176) respectively.

5. The circuit breaker according to claim 1, further comprising an electromagnetic release (180), one end of the electromagnetic release (180) being electrically connected to the outlet terminal (120), and the other end being electrically connected to the first stationary contact (130) and the second stationary contact (140), respectively.

6. The circuit breaker according to claim 5, wherein the electromagnetic release (180) comprises a housing (181), a third conductive plate (182) and a fourth conductive plate (183), the third conductive plate (182) and the fourth conductive plate (183) are both disposed in the housing (181), one end of the third conductive plate (182) is electrically connected to the wire outlet end (120), the other end is electrically connected to the first stationary contact (130), one end of the fourth conductive plate (183) is electrically connected to the wire outlet end (120), and the other end is electrically connected to the second stationary contact (140).

7. The circuit breaker according to claim 6, wherein the electromagnetic release (180) further comprises an armature (184), a yoke (185) and a torsion spring (186), the armature (184) is rotatably connected to the third conductive plate (182) and is disposed at a distance from the yoke (185), the yoke (185) is fixedly connected to the fourth conductive plate (183), the torsion spring (186) is mounted in the housing (181) and abuts against the armature (184), the yoke (185) can absorb the armature (184) when the fourth conductive plate (183) passes through a current greater than a preset value, so that the armature (184) overcomes the elasticity of the torsion spring (186) and rotates relative to the third conductive plate (182), and the armature (184) is used for driving the release mechanism (190) to release.

8. The circuit breaker according to claim 7, wherein the electromagnetic release (180) further comprises a rivet (187) and a rotating shaft (188), the armature (184) and the yoke (185) are all U-shaped, the armature (184) is enclosed outside the third conductive plate (182), the yoke (185) is enclosed outside the fourth conductive plate (183), the yoke (185) is fixedly connected with the fourth conductive plate (183) through the rivet (187), the rotating shaft (188) sequentially passes through the armature (184), the third conductive plate (182) and the yoke (185), the armature (184) can rotate relative to the rotating shaft (188), and the rotating shaft (188) is used for limiting the yoke (185).

9. The circuit breaker of claim 1, wherein the first latch assembly (191) comprises a first latch (1911), a first trip (1912), and a first bracket (1913), the first latch (1911) is in snap fit with the first trip (1912) and is rotatably connected to the first bracket (1913), the first bracket (1913) is rotatably connected to the first movable contact (150), the second latch assembly (192) comprises a second latch (1921), a second trip (1922), and a second bracket (1923), the second latch (1921) is in snap fit with the second trip (1922) and is rotatably connected to the second bracket (1923), the second bracket (1923) is rotatably connected to the second movable contact (160), the trip member (193) is disposed between the first latch (1911) and the second latch (1921), the first trip member (1921), and the second latch member (1921) are rotatably connected to the second bracket (1923), and the trip member (1921) is rotatably connected to the second latch member (1921), respectively.

10. The circuit breaker of claim 9, wherein the tripping mechanism (190) further comprises a linkage shaft (194), the first latch (1911) is provided with a first tube (1914), the second latch (1921) is provided with a second tube (1924), the first tube (1914) and the second tube (1924) are coaxially arranged, the inner diameter of the first tube (1914) is smaller than the inner diameter of the second tube (1924), one end of the linkage shaft (194) extends into the first tube (1914) and is matched with the first tube (1914), the other end of the linkage shaft (194) extends into the second tube (1924), the first tube (1914) and the second tube (1924) are both in abutting contact with the tripping member (193), the linkage shaft (194) and the tripping member (1914) are arranged at intervals, and the first latch (1911) can be further rotated by the linkage shaft (1911) and the first latch (1911) when the first latch (1911) is further rotated.

11. The circuit breaker according to claim 1, wherein the operating mechanism (210) comprises a button (211), a first transmission assembly (212) and a second transmission assembly (213), the housing (200) is provided with a chute (202), the button (211) is slidably arranged in the chute (202), the button (211) is respectively connected with the first transmission assembly (212) and the second transmission assembly (213), the first transmission assembly (212) is connected with the first latch assembly (191), and the second transmission assembly (213) is connected with the second latch assembly (192).

12. The circuit breaker according to claim 11, wherein the button (211) is provided with a first waist-shaped hole (2111) and a second waist-shaped hole (2112) side by side, the first transmission assembly (212) comprises a first U-shaped connecting rod (2121), a first handle (2122) and a second U-shaped connecting rod (2123), one end of the first U-shaped connecting rod (2121) extends into the first waist-shaped hole (2111) and can slide relative to the first waist-shaped hole (2111), the other end of the first U-shaped connecting rod (2121) is rotatably connected with the first handle (2122), one end of the second U-shaped connecting rod (2123) is rotatably connected with the first handle (2122), the other end is connected with the first locking assembly (191), the second transmission assembly (213) comprises a third U-shaped connecting rod (2131), a second handle (2132) and a fourth U-shaped connecting rod (2133), the other end of the third U-shaped connecting rod (2131) extends into the second handle (2132) and can rotate relative to the second handle (2132).

13. The circuit breaker according to claim 1, further comprising an arc extinguishing mechanism (220), wherein the arc extinguishing mechanism (220) comprises an arc extinguishing grid sheet group (221), a first arc striking groove (2211) and a second arc striking groove (2212) are arranged on the arc extinguishing grid sheet group (221) at intervals, the position of the first arc striking groove (2211) corresponds to the contact position of the first moving contact (150) and the first fixed contact (130), and the position of the second arc striking groove (2212) corresponds to the contact position of the second moving contact (160) and the second fixed contact (140).

14. The circuit breaker of claim 13, wherein the arc extinguishing grid sheet group (221) comprises a plurality of arc extinguishing grid sheets (2213), a plurality of arc extinguishing grid sheets (2213) are overlapped, a first arc striking notch (2214) and a second arc striking notch (2215) are arranged at intervals on the edge of each arc extinguishing grid sheet (2213), the first arc striking notches (2214) are sequentially communicated to form the first arc striking groove (2211), and the second arc striking notches (2215) are sequentially communicated to form the second arc striking groove (2212).

15. The circuit breaker of claim 13, wherein the arc extinguishing mechanism (220) further comprises a first arc guiding plate (222), a first arc striking plate (223), a second arc guiding plate (224) and a second arc striking plate (225), the arc extinguishing grid sheet group (221) is clamped between the first arc guiding plate (222) and the first arc striking plate (223), the positions of the first arc guiding plate (222) and the first arc striking plate (223) correspond to the positions of the first arc striking groove (2211), the arc extinguishing grid sheet group (221) is clamped between the second arc guiding plate (224) and the second arc striking plate (225), and the positions of the second arc guiding plate (224) and the second arc striking plate (225) correspond to the positions of the second arc striking groove (2212).