CN109427511B - Circuit breaker - Google Patents
Circuit breaker Download PDFInfo
- Publication number
- CN109427511B CN109427511B CN201710727213.8A CN201710727213A CN109427511B CN 109427511 B CN109427511 B CN 109427511B CN 201710727213 A CN201710727213 A CN 201710727213A CN 109427511 B CN109427511 B CN 109427511B
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- China
- Prior art keywords
- bulge
- arc
- coil
- base
- extinguishing chamber
- Prior art date
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Links
- 238000003466 welding Methods 0.000 claims abstract description 41
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 238000005192 partition Methods 0.000 claims description 63
- 238000002955 isolation Methods 0.000 claims description 31
- 238000000926 separation method Methods 0.000 claims description 17
- 238000010891 electric arc Methods 0.000 claims description 16
- 238000009434 installation Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 2
- 238000005452 bending Methods 0.000 claims 1
- 208000010543 22q11.2 deletion syndrome Diseases 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008033 biological extinction Effects 0.000 description 3
- 238000004880 explosion Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0207—Mounting or assembling the different parts of the circuit breaker
- H01H71/0235—Contacts and the arc extinguishing space inside individual separate cases, which are positioned inside the housing of the circuit breaker
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0207—Mounting or assembling the different parts of the circuit breaker
Landscapes
- Breakers (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The circuit breaker comprises a shell and an electromagnetic system arranged in the shell, wherein the electromagnetic system comprises an iron core, a coil wound on the iron core, a wiring board connected with one end of the coil and a bracket connected with the other end of the coil; one side of the welding part of the bracket and the other end of the coil is provided with a penetrating groove for avoiding the coil. According to the invention, the slotted structure is designed on one side of the electric welding position of the bracket, so that the problem that when the end part of the coil is welded with the bracket, the welding part of the coil deforms to squeeze the bracket, the bracket deforms, and the assembly efficiency is improved.
Description
Technical Field
The invention relates to the field of piezoelectric devices, in particular to a circuit breaker.
Background
In order to solve the problem that the electric arc is sprayed out of the handle position area when the short circuit is broken, the thin-wall characteristic is designed in the handle area assembled on the shell, so that an arc spraying gap between the shell and the handle is closed, the arc is prevented from being sprayed out of the handle area, and the harm to a person caused by arc spraying is avoided. However, the part (such as a short-circuit protection system, an operating mechanism and the like) between the handle and the arc extinguishing device still can be sprayed and sputtered by the electric arc; the injection of the electric arc easily fuses a spring, a coil enamelled wire with small current specification and the like in an operation structure, so that functional failure is caused; metal particles are easy to generate in the process of melting the spring, the enameled wire and the like, and can be sputtered to any position in the circuit breaker under the action of internal high air pressure, so that a series of problems of sliding buckle, non-electrifying and the like of a product are caused.
At the short-circuit protection system part of the circuit breaker, the connection of the coil and the bracket is realized in a spot welding mode, deformation of the bracket is easy to occur during spot welding, interference with the shell is caused during assembly, assembly difficulty is increased, and production efficiency is reduced.
The existing partition plate (arranged between the base and the upper cover) is of an integrated structure, the upper and lower moving contact supports, and the assembly or the disassembly of the wiring terminals are inconvenient, and the moving contact supports are unstable in movement and influence the stability of the circuit breaker.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the circuit breaker which is simple and compact in structure, safe and stable in performance and convenient to install and detach.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the circuit breaker comprises a shell and an electromagnetic system 1 arranged in the shell, wherein the electromagnetic system 1 comprises an iron core 12, a coil 11 wound on the iron core 12, a wiring board 14 connected with one end of the coil 11 and a bracket 13 connected with the other end of the coil 11; one side of the welding part between the bracket 13 and the other end of the coil 11 is provided with a penetrating groove 131 for avoiding the coil 11.
Further, a coil fillet 111 corresponding to the through groove 131 is provided on one side of the welding portion between the coil 11 and the bracket 13.
Further, the bracket 13 includes a bracket body 136, a coil welding surface 132 extending outward from one end of the bracket body 136 and welded to the other end of the coil 11, the trough 131 is disposed on the bracket body 136, the width of the coil welding surface 132 is smaller than that of the bracket body 136, the end of the coil welding surface 132 is connected with a contact welding surface 135 perpendicular to the coil welding surface 132, and an arc striking angle 134 is bent upward from the end of the contact welding surface 135 toward one side of the bracket body 136.
Further, the maximum width of the trough 131 is smaller than the width of the end of the arc striking angle 134.
Further, the coil welding surface 132 protrudes to one side and is provided with a positioning rib 133 fixed with the housing, and the housing is provided with a positioning groove 63 in installation fit with the positioning rib 133.
Further, the minimum distance from the permeable slot 131 to the edge of the bracket body 136 is greater than or equal to 1mm.
Further, the connector comprises connecting terminals 4 arranged on two sides in a shell, wherein the shell comprises a base 9 and a cover plate 8 buckled with the base 9, and further comprises a first partition plate 7 and a second partition plate 6 which are arranged on the base 9 in a split mode, wherein the first partition plate 7 is arranged on one side of the base 9 and used for installing the connecting terminals 4 on one side of the base 9, and the second partition plate 6 is arranged on the other side of the base 9 and used for installing the connecting terminals 4 on the other side of the base 9; the positioning groove 63 is formed on the second partition board 6, and a positioning groove 63 is formed between an eighth protrusion 62 and a protrusion 65, which are convexly arranged on one side of the second partition board 6.
The electromagnetic system comprises a shell, an operating mechanism 2 and an arc extinguishing chamber 5, wherein the operating mechanism 2 and the arc extinguishing chamber 5 are arranged in the shell and used for short-circuit protection, the electromagnetic system 1 and the operating mechanism 2 are arranged at the upper part of the shell, the arc extinguishing chamber 5 is arranged at the lower part of the shell, and an isolating structure used for isolating the arc extinguishing chamber 5 from the electromagnetic system 1 and the operating mechanism 2 and preventing electric arcs from being sprayed upwards to the electromagnetic system 1 and the operating mechanism 2 is arranged on the shell; the shell comprises a base 9, a cover plate 8 buckled with the base 9, a first partition plate 7 arranged on one side of the base 9 and used for installing one side wiring terminal 4, and a second partition plate 6 arranged on the other side of the base 9 and used for installing the other side wiring terminal 4; the isolation structure comprises a first isolation structure, a second isolation structure, a third isolation structure and a fourth isolation structure, wherein the first isolation structure, the second isolation structure, the third isolation structure and the fourth isolation structure are sequentially arranged next to each other; the first separation structure comprises a first protrusion 72 protruding from the first partition 7 and a second protrusion 82 protruding from the cover plate 8 towards the base 9 and matched with the first protrusion 72, and the first protrusion 72 and the second protrusion 82 are close to the wiring terminal 4 on one side of the circuit breaker; the first protrusion 72 and the second protrusion 82 are L-shaped, the first protrusion 72 includes a first protrusion 721 and a second protrusion 722 perpendicular to the first protrusion 721, and the second protrusion 82 includes a third protrusion 821 corresponding to the first protrusion 721 and a fourth protrusion 822 corresponding to the second protrusion 722; the second separation structure comprises a third bulge 71 which is arranged on the first partition plate 7 in a protruding way and a fourth bulge 84 which is arranged on the cover plate 8 in a protruding way towards the base 9 and is matched with the third bulge 71; the third projection 71 and the fourth projection 84 are flat projections; the third separation structure comprises a fifth bulge 51, a sixth bulge 61 and a seventh bulge 83, wherein the fifth bulge 51 is arranged on the bottom surface of the base 9 in a protruding mode, the sixth bulge 61 is arranged on the second partition plate 6 in a protruding mode and is spliced with the fifth bulge 51, the seventh bulge 83 is arranged towards the base 9 in a protruding mode and corresponds to the fifth bulge 51 and the sixth bulge 61, and the fifth bulge 51, the sixth bulge 61 and the seventh bulge 83 are all in a flat plate shape; the fourth separation structure includes an eighth protrusion 62 protruding from the second partition 6 and a ninth protrusion 81 protruding from the cover 8 toward the base 9 and corresponding to the eighth protrusion 62, the eighth protrusion 62 and the ninth protrusion 81 being cylindrical protrusions for mounting screws.
Further, the shell comprises a base 9, a cover plate 8 buckled with the base 9, a first partition plate 7 and a second partition plate 6 which are arranged on the base 9 in a split mode, wherein the first partition plate 7 is arranged on one side of the base 9 and used for installing the wiring terminal 4 on one side of the base 9, and the second partition plate 6 is arranged on the other side of the base 9 and used for installing the wiring terminal 4 on the other side of the base 9; the first partition plate 7 is positioned at one side of an arc outlet of the arc extinguishing chamber 5, the second partition plate 6 is positioned at one side of an arc inlet of the arc extinguishing chamber, an extension plate 6a is arranged on one side of the second partition plate 6 facing the arc extinguishing chamber 5 in an extending mode, the extension plate 6a extends to the arc inlet of the arc extinguishing chamber, and two-phase contact supports 25 of the operating mechanism 2 are separated by the extension plate 6 a; the back of the second partition plate 6 is provided with a chute 66 for limiting the contact support 25 below the second partition plate 6.
Further, a plurality of arc striking plates 61a are arranged on the extending plate 6a in a protruding manner at the position close to the arc inlet of the arc extinguishing chamber, and an arc striking groove 61b is formed between the adjacent arc striking plates 61 a; the front and back surfaces of the first partition plate 7, which are close to one side of the arc outlet of the arc extinguishing chamber 5, are respectively provided with an arc discharge groove 73, the end parts of the arc discharge grooves 73 extend to the lower end of the first partition plate 7, and the arc discharge grooves 73 are provided with separation columns 731 for separating exhaust gas of the arc extinguishing chamber, which are close to the arc outlet of the arc extinguishing chamber 5, in a protruding manner.
According to the invention, the slotted structure is designed on one side of the electric welding position of the bracket, so that the problem that when the end part of the coil is welded with the bracket, the welding part of the coil deforms to squeeze the bracket, the bracket deforms, and the assembly efficiency is improved. One side of the welding part of the coil and the bracket is provided with a coil fillet corresponding to the penetrating groove, so that the deformation of the coil fillet during spot welding cannot act on the bracket, the normal shape of the bracket is ensured, the bracket is convenient to assemble, and the production efficiency is improved.
Drawings
FIG. 1 is a schematic view of a base of the present invention without a first spacer;
FIG. 2 is a schematic view of the structure of the base of the present invention for mounting a first partition and a second partition;
FIG. 3 is a schematic view of the structure of the base of the present invention;
FIG. 4 is a perspective view of a first separator of the present invention;
FIG. 5 is a schematic front view of a second separator of the present invention;
FIG. 6 is a schematic back view of a second separator of the present invention;
FIG. 7 is a schematic view of the structure of the cap of the present invention;
FIG. 8 is an enlarged view of the trip latch and guide block of the present invention;
FIG. 9 is a schematic diagram of an electromagnetic system of the present invention;
FIG. 10 is a schematic view of the structure of the stent of the present invention;
fig. 11 is a top view of the electromagnetic system of the present invention.
Detailed Description
Embodiments of the circuit breaker of the present invention are further described below with reference to the examples given in connection with fig. 1 to 11. The circuit breaker of the present invention is not limited to the description of the following embodiments.
As shown in fig. 1-2, the circuit breaker of the invention comprises a shell body composed of a base 9, a cover 8 buckled with the base 9 and a partition plate, an electromagnetic system 1 installed inside the base 9 and used for short-circuit protection, an operating mechanism 2, an arc extinguishing chamber 5 and an overload protection mechanism 10. The electromagnetic system 1 and the operating mechanism 2 are arranged on the upper portion of the shell, the arc extinguishing chamber 5 is arranged on the lower portion of the shell, the electromagnetic system 1 is arranged in the middle of the base 9, the arc extinguishing chamber 5 is arranged right below the electromagnetic system 1, the operating mechanism 2 is arranged on one side of the electromagnetic system 1, and the overload protection mechanism 10 is arranged on one side of the arc extinguishing chamber close to the connecting terminal 4 on the other side in the shell. The circuit breaker is simple and compact in inside and convenient for miniaturization design.
As shown in fig. 2, the operating mechanism 2 includes a U-shaped rod 21, a lock catch 22, a trip button 23, and a support 24, where one end of the U-shaped rod 21 is connected with a handle, the other end is connected with the lock catch 22, the support 24 is pivotally connected inside the casing, the lock catch 22 and the trip button 23 are pivotally connected on the support 24, the lock catch 22 and the trip button 23 are in snap connection, a contact support 25 is installed at an end of the support 24, a moving contact is provided at an end of the contact support 25, a fixed contact opposite to the moving contact is fixedly installed in the base 9, the fixed contact is located at one side of the arc extinguishing chamber 5, and when a circuit is shorted, a striker of the electromagnetic system 1 pushes the trip button 23 open to drive the lock catch 22 and the trip button 23 to trip; the contact support 25 is pivotally connected with a trip hook 26, and the end part of the trip hook 26 is opposite to one side of the bimetallic strip of the overload protection mechanism 10, when the circuit is overloaded, the bimetallic strip is heated to bend and touch the trip hook 26 to drive the lock catch 22 and the trip button 23 to trip. The operating mechanism 2 of the invention has simple and compact structure, safe and stable performance and is convenient for the miniaturization design of the operating structure.
As shown in fig. 9 to 11, the electromagnetic system 1 of the circuit breaker of the present invention includes a core 12, a coil 11 wound on the core 12, a wiring board 14 connected to one end of the coil 11, and a bracket 13 connected to the other end of the coil 11; one side of the welding part between the bracket 13 and the other end of the coil 11 is provided with a penetrating groove 131 for avoiding the coil 11. According to the invention, the slotted structure is designed on one side of the electric welding position of the bracket, so that the problem that when the end part of the coil is welded with the bracket, the welding part of the coil deforms to squeeze the bracket, the bracket deforms, and the assembly efficiency is improved.
As shown in fig. 9 and 11, in particular, a coil fillet 111 corresponding to the trough 131 is disposed at one side of the welding position between the coil 11 and the bracket 13, so that the deformation of the coil fillet 111 during spot welding cannot act on the bracket 13, the normal shape of the bracket 13 is ensured, the bracket 13 is convenient to assemble, and the production efficiency is improved.
As shown in fig. 10, a fixed contact is welded on one side of the bracket 13 of the invention below the installation coil to form a fixed contact of the circuit breaker. The support 13 comprises a support body 136 and a coil welding surface 132 which is arranged at one end of the support body 136 and is outwards extended to be welded with the other end of the coil 11, the permeable groove 131 is arranged on the support body 136, the width of the coil welding surface 132 is smaller than that of the support body 136, the end part of the coil welding surface 132 is connected with a contact welding surface 135 perpendicular to the coil welding surface 132, and an arc striking angle 134 is upwardly bent towards one side of the support body 136 at the end part of the contact welding surface 135. The structure of the support is simple and compact, the contact welding surface 135 is used for welding a fixed contact to form a fixed contact, and the arc striking angle 134 is used for leading an arc into the arc extinguishing chamber 5 to extinguish the arc when the fixed contact and the fixed contact are closed.
Specifically, the maximum width of the trough 131 is smaller than the width of the end of the arc striking angle 134, so that the end of the arc striking angle 134 of the bracket 13 is not embedded into the trough 131 in the processes of electroplating, packaging and the like. The coil welding surface 132 is provided with a positioning rib 133 fixed with the shell in a protruding way to one side, the partition board is provided with a positioning groove 63 in installation fit with the positioning rib 133, and the positioning rib 133 is in installation fit with the positioning groove 63 in the shell, so that the installation structure of the bracket 13 is stable and reliable. The minimum distance from the material permeation groove 131 to the edge of the bracket body 136 is more than or equal to 1mm, so that the strength of the bracket is ensured.
As shown in fig. 1 to 6, the circuit breaker of the invention comprises a first partition 7 and a second partition 6 which are arranged on a base 9 in a split mode, wherein the first partition 7 is arranged on one side of the base 9 and used for installing a connecting terminal 4 on one side of the base 9, and the second partition 6 is arranged on the other side of the base 9 and used for installing the connecting terminal 4 on the other side of the base 9. The partition board of the circuit breaker adopts a split design, so that the contact support and the assembly and disassembly of the wiring terminals at two sides are convenient, and the production efficiency is improved.
As shown in fig. 1, 2, 5 and 6, the first partition 7 is located at one side of the arc outlet of the arc extinguishing chamber 5, the second partition 6 is located at one side of the arc inlet of the arc extinguishing chamber, the second partition 6 extends towards one side of the arc extinguishing chamber 5 and is provided with an extension plate 6a, the extension plate 6a extends to the arc inlet of the arc extinguishing chamber, and the two-phase contact support 25 of the operating mechanism 2 is separated by the extension plate 6 a. The circuit breaker of the present invention is a two-phase contact, which is provided on both sides of the support 24, respectively, and is partitioned on both sides of the extension plate 6 a. The back of second baffle 6 is equipped with the spout 66 that is used for spacing second baffle 6 below contact support 25, and spout 66 makes the moving contact on the contact support 25 can with the contact centering contact, effectually solved the contact deflection and contacted bad problem that arouses, improved the inside temperature rise of product, improved the reliability that the product was used.
As shown in fig. 4-6, the extending plate 6a is provided with a plurality of arc striking plates 61a protruding from the arc inlet near the arc extinguishing chamber, and an arc striking groove 61b is formed between adjacent arc striking plates 61 a. The extension plate 6a sets up the striking board 61a and will electric arc quick-witted in introducing the explosion chamber, through the setting to striking board interval and shape, can carry out fine dispersion to electric arc, the extinction electric arc that the explosion chamber can be more quick improves the extinction efficiency. The front and back sides of the first baffle 7, which are close to one side of the arc outlet of the arc extinguishing chamber 5, are respectively provided with an arc discharge groove 73, the end parts of the arc discharge grooves 73 extend to the lower end of the first baffle 7, the arc discharge grooves 73 are provided with separation columns 731 for separating exhaust gas of the arc extinguishing chamber in a protruding manner, which are close to the arc outlet of the arc extinguishing chamber 5, and high-temperature gas after arc extinction of the arc extinguishing chamber enters the arc striking grooves 61b after being separated by the separation columns 731 on one side, and is discharged from the bottom of the base.
As shown in fig. 8, the guide block 64 is protruded above the trip hook 26 and the upper edge of the second partition board 6, the trip hook 26 includes a first hook section 261 parallel to the bottom surface of the base, the end of the first hook section 261 is bent and provided with a second hook section 262 perpendicular to the bottom surface of the base, the end of the second hook section 262 is bent and provided with a trigger end 263 in contact and matched with the bimetal, the trigger end 263 is perpendicular to the first hook section 261 and the second hook section 262, and the trigger end 263 is parallel to the bimetal. A guide block 64 for limiting the linkage rod 31 is arranged on the second partition plate 6 in a protruding mode; the second hooking section 262 is in contact engagement with the guide block 64. The linkage rod 31 can move along the guide block 64, so that the movement space of the linkage rod 31 is reduced, the movement track of the linkage rod 31 is more consistent and avoided, and the front end of the linkage rod 31 is prevented from being propped against the inner wall of the second partition plate 6.
As shown in fig. 4-7, the shell of the invention is provided with an isolating structure for isolating the arc extinguishing chamber 5 from the electromagnetic system 1 and the operating mechanism 2 and preventing the electric arc from being sprayed upwards to the electromagnetic system 1 and the operating mechanism 2, and the isolating structure is positioned between the arc extinguishing chamber 5 and the electromagnetic system 1 and the operating mechanism 2. According to the invention, the isolation structure is arranged between the arc extinguishing chamber and the electromagnetic system 1 and the operating mechanism 2, so that the arc is guided to be sprayed out from the bottom area of the product, devices between the arc extinguishing device and the handle are protected, and the reliability of the product is improved.
As shown in fig. 4-7, the isolation structure is formed by splicing multi-component isolation structures arranged on the shell. The isolation structure of the embodiment is divided into four groups which are respectively arranged on the base 9, the cover 8 and the partition plate, and the isolation structure is formed after the shell is assembled. The isolation structure comprises a first isolation structure, a second isolation structure, a third isolation structure and a fourth isolation structure which are sequentially arranged on the shell in a next-to-next mode. And a spliced isolation structure is adopted, so that the processing is convenient. Obviously, the grouping of the isolation structures may be adjusted to the specific situation.
As shown in fig. 4 and 7, the first separation structure includes a first protrusion 72 protruding from the first partition 7 and a second protrusion 82 protruding from the cover 8 toward the base 9 and matching with the first protrusion 72, where the first protrusion 72 and the second protrusion 82 are close to the terminal 4 on one side of the circuit breaker; the first protrusion 72 and the second protrusion 82 are L-shaped, the first protrusion 72 includes a first protrusion 721 and a second protrusion 722 perpendicular to the first protrusion 721, and the second protrusion 82 includes a third protrusion 821 corresponding to the first protrusion 721 and a fourth protrusion 822 corresponding to the second protrusion 722. After the first partition 7 and the cover plate 8 are installed, the first protrusion 72 and the second protrusion 82 are assembled and matched.
As shown in fig. 4 and 7, the second separation structure includes a third protrusion 71 protruding from the first partition 7 and a fourth protrusion 84 protruding from the cover 8 toward the base 9 and cooperating with the third protrusion 71; the third projection 71 and the fourth projection 84 are flat projections. After the first partition 7 and the cover plate 8 are mounted, the third protrusion 71 and the fourth protrusion 84 are assembled and matched.
As shown in fig. 1, 5 and 7, the third separation structure includes a fifth protrusion 51 protruding from the bottom surface of the base 9, a sixth protrusion 61 protruding from the second separator 6 and spliced with the fifth protrusion 51, and a seventh protrusion 83 protruding from the cover 8 toward the base 9 and corresponding to the fifth protrusion 51 and the sixth protrusion 61, where the fifth protrusion 51, the sixth protrusion 61 and the seventh protrusion 83 are all in a flat plate shape. After the base, the second partition plate and the cover plate are installed, the fifth bulge 51, the sixth bulge 61 and the seventh bulge 83 are assembled and matched.
As shown in fig. 5 and 7, the fourth separation structure includes an eighth protrusion 62 provided to protrude from the second separator 6 and a ninth protrusion 81 provided to protrude from the cover plate 8 toward the base 9, the eighth protrusion 62 and the ninth protrusion 81 being cylindrical protrusions for mounting screws. After the second partition plate and the cover plate are installed, the eighth bulge 62 and the ninth bulge 81 are assembled and matched, the fourth separation structure utilizes the cylinder installed by the existing screw, so that the processing is convenient, and the cost is reduced.
Obviously, the shape and size of the specific structure of the four groups of isolation structures can be correspondingly adjusted.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (9)
1. A circuit breaker comprising a housing and an electromagnetic system (1) mounted inside the housing, characterized in that: the electromagnetic system (1) comprises an iron core (12), a coil (11) wound on the iron core (12), a wiring board (14) connected with one end of the coil (11) and a bracket (13) connected with the other end of the coil (11);
one side of the welding part of the bracket (13) and the other end of the coil (11) is provided with a permeable groove (131) for avoiding the coil (11);
the electromagnetic system comprises a shell, an operating mechanism (2) and an arc extinguishing chamber (5), wherein the operating mechanism (2) and the arc extinguishing chamber (5) are arranged in the shell and used for short-circuit protection, the electromagnetic system (1) and the operating mechanism (2) are arranged on the upper part of the shell, the arc extinguishing chamber (5) is arranged on the lower part of the shell, and an isolating structure used for isolating the arc extinguishing chamber (5) from the electromagnetic system (1) and the operating mechanism (2) and preventing electric arcs from being sprayed upwards to the electromagnetic system (1) and the operating mechanism (2) is arranged on the shell;
the shell comprises a base (9) and a cover plate (8) buckled with the base (9), and further comprises a first partition plate (7) and a second partition plate (6) which are arranged on the base (9) in a split mode, wherein the first partition plate (7) is arranged on one side of the base (9) and is used for installing a wiring terminal (4) on one side of the base (9), and the second partition plate (6) is arranged on the other side of the base (9) and is used for installing a wiring terminal (4) on the other side of the base (9); the first partition plate (7) is positioned at one side of an arc outlet of the arc extinguishing chamber (5), the second partition plate (6) is positioned at one side of an arc inlet of the arc extinguishing chamber, the second partition plate (6) extends towards one side of the arc extinguishing chamber (5) and is provided with an extension plate (6 a), the extension plate (6 a) extends to the arc inlet of the arc extinguishing chamber, and two-phase contact supports (25) of the operating mechanism (2) are separated by the extension plate (6 a); the back of the second partition plate (6) is provided with a chute (66) for limiting the contact support (25) below the second partition plate (6).
2. The circuit breaker according to claim 1, characterized in that: one side of the welding part of the coil (11) and the bracket (13) is provided with a coil fillet (111) corresponding to the permeable groove (131).
3. A circuit breaker according to claim 1 or 2, characterized in that: the support (13) comprises a support body (136), a coil welding surface (132) which is arranged at one end of the support body (136) and is welded with the other end of the coil (11) in an outward extending mode, a penetrating groove (131) is formed in the support body (136), the width of the coil welding surface (132) is smaller than that of the support body (136), a contact welding surface (135) perpendicular to the coil welding surface (132) is connected to the end portion of the coil welding surface (132), and an arc striking angle (134) is formed in the end portion of the contact welding surface (135) in an upward bending mode towards one side of the support body (136).
4. A circuit breaker according to claim 3, characterized in that: the maximum width of the permeable groove (131) is smaller than the width of the end part of the arc striking angle (134).
5. A circuit breaker according to claim 3, characterized in that: the coil welding surface (132) is provided with a positioning rib (133) fixed with the shell in a protruding way to one side, and the shell is provided with a positioning groove (63) in installation fit with the positioning rib (133).
6. A circuit breaker according to claim 3, characterized in that: the minimum distance between the material permeation groove (131) and the edge of the bracket body (136) is more than or equal to 1mm.
7. The circuit breaker of claim 5, wherein: the connecting terminal is characterized by further comprising connecting terminals (4) arranged on two sides in the shell, the positioning groove (63) is formed in the second partition board (6), and the positioning groove (63) is formed between an eighth bulge (62) and a bump (65) which are arranged on one side of the second partition board (6) in a protruding mode.
8. The circuit breaker according to claim 1, characterized in that: the isolation structure comprises a first isolation structure, a second isolation structure, a third isolation structure and a fourth isolation structure, wherein the first isolation structure, the second isolation structure, the third isolation structure and the fourth isolation structure are sequentially arranged next to each other; the first separation structure comprises a first bulge (72) which is arranged on the first partition plate (7) in a protruding mode and a second bulge (82) which is arranged on the cover plate (8) in a protruding mode towards the base (9) and matched with the first bulge (72), and the first bulge (72) and the second bulge (82) are close to a wiring terminal (4) on one side of the circuit breaker; the first bulge (72) and the second bulge (82) are L-shaped, the first bulge (72) comprises a first convex plate (721) and a second convex plate (722) perpendicular to the first convex plate (721), and the second bulge (82) comprises a third convex plate (821) corresponding to the first convex plate (721) and a fourth convex plate (822) corresponding to the second convex plate (722); the second separation structure comprises a third bulge (71) which is arranged on the first partition board (7) in a protruding mode and a fourth bulge (84) which is arranged on the cover board (8) in a protruding mode towards the base (9) and matched with the third bulge (71); the third bulge (71) and the fourth bulge (84) are flat bulges; the third separation structure comprises a fifth bulge (51) which is arranged on the bottom surface of the base (9) in a protruding mode, a sixth bulge (61) which is arranged on the second partition plate (6) in a protruding mode and spliced with the fifth bulge (51), and a seventh bulge (83) which is arranged on the cover plate (8) in a protruding mode towards the base (9) and corresponds to the fifth bulge (51) and the sixth bulge (61), and the fifth bulge (51), the sixth bulge (61) and the seventh bulge (83) are all in a flat plate shape; the fourth separation structure comprises an eighth bulge (62) and a ninth bulge (81), wherein the eighth bulge (62) is arranged on the second partition plate (6) in a protruding mode, the ninth bulge (81) is arranged towards the base (9) in a protruding mode and corresponds to the eighth bulge (62), and the eighth bulge (62) and the ninth bulge (81) are cylindrical bulges for installing screws.
9. The circuit breaker according to claim 1, characterized in that: the extension plates (6 a) are provided with a plurality of arc-shaped arc striking plates (61 a) in a protruding mode at the arc inlet close to the arc extinguishing chamber, and arc striking grooves (61 b) are formed between the adjacent arc striking plates (61 a); the front and back sides of one side of the first partition board (7) close to the arc outlet of the arc extinguishing chamber (5) are respectively provided with an arc discharge groove (73), the end part of the arc discharge groove (73) extends to the lower end of the first partition board (7), and the arc discharge groove (73) is provided with a separation column (731) for separating exhaust gas of the arc extinguishing chamber in a protruding mode close to the arc outlet of the arc extinguishing chamber (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710727213.8A CN109427511B (en) | 2017-08-22 | 2017-08-22 | Circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710727213.8A CN109427511B (en) | 2017-08-22 | 2017-08-22 | Circuit breaker |
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| CN109427511A CN109427511A (en) | 2019-03-05 |
| CN109427511B true CN109427511B (en) | 2024-03-26 |
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