CN107808790B - Moulded case circuit breaker magnet subassembly for contact structure - Google Patents
Moulded case circuit breaker magnet subassembly for contact structure Download PDFInfo
- Publication number
- CN107808790B CN107808790B CN201711144653.7A CN201711144653A CN107808790B CN 107808790 B CN107808790 B CN 107808790B CN 201711144653 A CN201711144653 A CN 201711144653A CN 107808790 B CN107808790 B CN 107808790B
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- CN
- China
- Prior art keywords
- iron core
- core shell
- shell
- rivet
- circuit breaker
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
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- Electromagnets (AREA)
- Breakers (AREA)
Abstract
The invention relates to a magnet assembly for a contact structure of a molded case circuit breaker, which comprises more than two iron cores and an iron core shell for installing the iron cores, wherein the iron core shell is provided with an installation cavity for installing the iron cores; during installation, the iron cores are installed in an installation cavity of the iron core shell to form a magnet assembly, then the magnet assembly is installed in the static contact, and the iron cores are positioned through the iron core shell. Compared with the prior art, the magnet assembly is of an integral structure, the installation is convenient, and the positioning of each iron core is firm.
Description
Technical Field
The present invention relates to a magnet assembly for mounting on a contact of a molded case circuit breaker.
Background
The low-voltage molded case circuit breaker is more and more widely applied to a low-voltage distribution system, is responsible for the double tasks of protecting and controlling a circuit, plays a vital role in the safety, reliability and practicability of the whole circuit system, and has great influence on the performance of products due to different structures of the circuit breaker. The existing low-voltage molded case circuit breaker contact system mainly comprises a moving contact and a fixed contact, and the arc blowing force of the circuit breaker to an electric arc immediately after the moving contact is repelled is very small, so that the breaking capacity of the circuit breaker is greatly reduced, and the breaking reliability is not high.
The background technical part of the chinese utility model patent with the publication number of CN205582867U and the publication date of 2016.09.14 discloses a moulded case circuit breaker magnetic blow structure, including static contact and two or more iron cores, the one end of static contact is the end of buckling of U-shape, and the iron core is total six, and wherein four vertical arrangements in the cavity of the end of buckling of U-shape, two other branches are established on the left and right sides of static contact, and six iron cores have formed into the magnet subassembly of semi-enclosed structure jointly.
The magnetic blow structure of the existing molded case circuit breaker can better solve the problems of low breaking capacity and low breaking reliability of the circuit breaker; however, the magnet assembly has a problem that the core positioning structure is complicated and the positioning of the core mounted in the stationary contact is not reliable enough.
Disclosure of Invention
The invention aims to provide a magnet assembly for a contact structure of a molded case circuit breaker, which is used for solving the problems of complex iron core positioning structure and unreliable positioning of the existing magnetic blow-out assembly.
In order to achieve the purpose, the scheme 1 of the magnet assembly for the contact structure of the plastic case circuit breaker is as follows: the magnet assembly for the contact structure of the molded case circuit breaker comprises more than two iron cores and an iron core shell for installing the iron cores, wherein the iron core shell is provided with an installation cavity for installing the iron cores.
In the scheme 2, according to the magnet assembly of the scheme 1, the iron core housing is provided with a magnet bottom hole, or the iron core housing and the iron core are both provided with a magnet bottom hole, corresponding to the position of the contact bottom hole on the static contact in the contact structure, for inserting the positioning column in the contact structure.
Scheme 3 is, according to scheme 2 the magnet subassembly, the iron core shell is opening rectangle casing up, is equipped with the casing bottom hole on the diapire of iron core shell, and the magnet bottom hole includes the casing bottom hole, the diapire setting of each iron core perpendicular to iron core shell.
Scheme 4 is, according to the magnet assembly of scheme 3, the bottom of iron core is equipped with the recess that supplies the tip of reference column to insert.
Scheme 5 is, according to scheme 4 the magnet subassembly, be equipped with on the two vertical edges of iron core and be used for with the spacing step of the top backstop of iron core shell, the step has the backstop face down.
Scheme 6 is, according to scheme 3 or 4 or 5 the magnet subassembly, be equipped with the rivet perforation that the face that is perpendicular to the iron core set up on the iron core, be equipped with the confession of ascending on the lateral wall of iron core shell the incision of rivet embedding, the iron core shell be close to the notched terminal surface supplies the rivet to exert axial tension.
Scheme 7 is that, according to the magnet assembly of scheme 6, there are two rivet holes that set up at the interval, and there are two notches that set up on the same lateral wall of iron core shell, each notch and each rivet hole one-to-one correspond.
Scheme 8 is that, according to the magnet assembly of scheme 7, the lower mouth edge of the notch is connected with an outward flange turned over towards the outside of the iron core shell.
The invention has the beneficial effects that: the magnet assembly comprises more than two iron cores and an iron core shell for installing the iron cores, each iron core is installed in an installation cavity of the iron core shell during installation to form the magnet assembly, then the magnet assembly is installed in a static contact, and the iron cores are positioned through the iron core shell. Compared with the prior art, the magnet assembly is of an integral structure, the installation is convenient, and the positioning of each iron core is firm.
Further, a magnet bottom hole is formed in the iron core shell or both the iron core shell and the iron core, and the positioning column is inserted into the magnet bottom hole; when the magnetic pole is detached, the positioning column is detached first, and the magnet assembly can be horizontally moved out of the fixed contact. Compared with the prior art, the magnet assembly is simple in connection structure and convenient to disassemble and assemble.
Furthermore, steps which are used for being matched with the top surface stop of the iron core shell when the iron core is installed are arranged on two vertical side edges of the iron core; the iron cores are positioned in an increased mode, the alignment of the iron cores arranged in parallel is guaranteed, and the use effect of the iron cores is guaranteed.
Furthermore, a rivet through hole is formed in the iron core, a notch is formed in the iron core shell, the iron core is installed in the middle of the rivet during assembly, and the end portion of the rivet is tightly pressed on the end face, close to the notch, of the iron core shell after the rivet is tensioned; the iron core and the iron core shell are connected into a whole, and the connection is firm.
Drawings
FIG. 1 is an assembly view of a magnet assembly of an embodiment of the present invention in a molded case circuit breaker contact configuration;
fig. 2 is an assembly view between the magnet assembly and the stationary contact and the support;
fig. 3 is a perspective view of a stationary contact;
FIG. 4 is a perspective view of the support member;
FIG. 5 is a bottom view of FIG. 4;
fig. 6 is a perspective view of the core housing;
fig. 7 is a perspective view of the core.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1 to 7, the contact structure of the molded case circuit breaker of the first embodiment of the magnet assembly for the contact structure of the molded case circuit breaker comprises a circuit breaker body 16, a fixed contact 1 and a support member 6, wherein one end of the fixed contact 1 is provided with a connecting hole for connecting with a base of the circuit breaker, the other end of the fixed contact is a U-shaped bending end, the U-shaped bending end is provided with a U-shaped concave cavity, and the top of the U-shaped bending end is provided with an arc striking angle 2 and a silver point 3; one end of the supporting piece 6 is used for supporting the U-shaped bending end, a positioning column 12 extending upwards is arranged on the supporting surface, and two connecting holes 17 used for being connected with a circuit breaker body 16 are arranged at the bottom of the other end.
The bottom wall of the U-shaped bent end is provided with a contact bottom hole 11 for a positioning column 12 to pass through, the positioning column 12 is a flat column with a cross section in a waist-round shape, the positioning column 12 is of a hollow structure, and the contact bottom hole 11 is a waist-shaped hole. Moulded case circuit breaker contact structure still includes the magnet subassembly that sets up in the U-shaped cavity of U-shaped end of buckling, and the magnet subassembly includes the iron core 4 that sets up more than two side by side and supplies the iron core shell 5 of 4 installations of iron core.
The iron core 4 in the embodiment is of a plate-shaped structure, the iron core shell 5 is a rectangular shell with an upward opening, and a shell bottom hole 8 for a positioning column 12 to pass through is formed in the bottom wall of the iron core shell 5; the iron core 4 is arranged in the iron core housing 5 perpendicularly to the bottom surface of the iron core housing 5 and perpendicularly to the positioning column 12. An inner chamfer 7 is arranged on the inner opening edge of the top opening of the iron core shell 5, so that the iron core 4 is convenient to mount.
The bottom of the iron core 4 is provided with a U-shaped groove 15 for embedding one end of the positioning column 12 inserted into the iron core shell 5; the bottom of two vertical sides of iron core 4 is equipped with the step 10 that is used for carrying out the backstop with the top of iron core shell 5 when installing iron core 4, and step 10 has the step face down.
In the embodiment, the iron core shell 5 and the iron core 4 are connected by rivets, two rivet through holes 9 arranged in parallel are arranged on the iron core 4, and the rivet through holes 9 are round holes; the top of iron core shell 5 is equipped with rectangle incision 13, and rectangle incision 13 supplies the rivet embedding, and the terminal surface that is close to rectangle incision 13 of iron core shell 5 supplies the rivet taut, and rectangle incision 13 on the same lateral wall has two that the interval set up, and the lower mouthful of each rectangle incision 13 is along being connected with the turn-ups 14 that turns over towards the outside of iron core shell 5 and turn over.
During assembly, the iron cores 4 are firstly installed in the iron core shell 5, the iron cores 4 and the iron core shell 5 are connected into a whole by rivets, the iron core shell 5 is installed in the U-shaped cavity of the static contact 1, the position of the shell bottom hole 8 corresponds to that of the contact bottom hole 11, the static contact 1 is installed on the support piece 6, and the upper end of the positioning column 12 is inserted into the U-shaped groove 15 at the bottom of the iron core 4; the position of the magnet assembly consisting of the core 4 and the core housing 5 is fixed on the stationary contact 1.
Compared with the prior art, the magnet assembly is of an integral structure, the installation is convenient, and the positioning of each iron core is firm; further, utilize reference column 12 to fix a position the magnet subassembly, simple structure, easy dismounting, the stable performance, magnetism blows and rivets the piece and can strengthen magnetic field, plays the magnetic conduction effect, and the guide electric arc enters into the arc extinguishing chamber fast, and is very big to the arc blowing power of electric arc, can effectively extinguish the arc to can strengthen the disconnected reliability of circuit breaker, and improve its disjunction ability.
In addition, the iron core 4 and the iron core shell 5 are connected into a whole through rivets, and the connection strength is high. Because the height space in the U-shaped concave cavity of the U-shaped bent end is limited, the number of the iron cores 4 which can be arranged can be increased by adopting a vertical arrangement mode for the iron cores 4.
The second embodiment is different from the first embodiment in that: the iron core assembly only comprises more than two iron cores, each iron core is arranged in the U-shaped bending end of the static contact in an up-down direction in a stacked mode, and the middle of each iron core is provided with a center hole for the positioning column to penetrate through from bottom to top. In addition, an iron core shell can be arranged on the periphery of the iron core, and a shell hole for the positioning column on the supporting piece to penetrate through is formed in the side wall of the iron core shell.
The third embodiment is different from the first embodiment in that: the iron core shell can also be arranged into a rectangular sleeve with a rectangular cross section, the rectangular sleeve is provided with a central hole which is communicated up and down, and the iron cores are arranged and installed in the central hole of the rectangular sleeve.
The fourth embodiment is different from the first embodiment in that: be equipped with respectively on the lateral wall of iron core middle part and iron core shell and supply the bolt to perforate, during the assembly with the iron core installation iron core shell, penetrate the screw by one side of iron core shell again, the screw passes each iron core in proper order, the other end of screw stretches out iron core shell, with the nut with the fix with screw.
The fifth embodiment is different from the first embodiment in that: more than two iron cores are connected into a whole by using screws or rivets, then the iron core is integrally installed in an iron core shell, the iron core shell is positioned by a positioning column, the iron core is positioned by the iron core shell, and a notch for avoiding the rivets/screws is not required to be arranged on the iron core shell.
Claims (4)
1. Moulded case circuit breaker magnet subassembly for contact structure includes the iron core more than two, its characterized in that: the iron core comprises an iron core shell, the iron core shell is provided with an installation cavity for installing an iron core, the iron core shell is provided with a magnet bottom hole for inserting a positioning column in a contact structure, or the iron core shell and the iron core are provided with a magnet bottom hole which corresponds to the position of a contact bottom hole on a static contact in the contact structure and is used for inserting the positioning column in the contact structure, the iron core shell is a rectangular shell with an upward opening, the bottom wall of the iron core shell is provided with a shell bottom hole, each iron core is arranged perpendicular to the bottom wall of the iron core shell, steps for stopping and limiting the top of the iron core shell are arranged on two vertical edges of the iron core, each step is provided with a downward stopping surface, the iron core is provided with a rivet through hole which is arranged perpendicular to the surface of the iron core, an upward notch for embedding the rivet is arranged on the side wall of the iron core shell, during assembly, the iron core is arranged in the middle of the rivet, the end part of the rivet is tightly pressed on the end face, close to the notch, of the iron core shell after the rivet is tensioned, and the iron core shell are connected into a whole.
2. The magnet assembly for a contact structure of a molded case circuit breaker according to claim 1, wherein: the bottom of iron core is equipped with the recess that supplies the tip of reference column inserts.
3. The magnet assembly for a contact structure of a molded case circuit breaker according to claim 1, wherein: the rivet perforation has two that the interval set up, sets up the incision on the same lateral wall of iron core shell has two, and each incision and each rivet perforation one-to-one correspond.
4. The magnet assembly for a contact structure of a molded case circuit breaker according to claim 3, wherein: the lower opening edge of the notch is connected with an outward flange which is turned over towards the outer side of the iron core shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711144653.7A CN107808790B (en) | 2017-11-17 | 2017-11-17 | Moulded case circuit breaker magnet subassembly for contact structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711144653.7A CN107808790B (en) | 2017-11-17 | 2017-11-17 | Moulded case circuit breaker magnet subassembly for contact structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107808790A CN107808790A (en) | 2018-03-16 |
| CN107808790B true CN107808790B (en) | 2019-12-20 |
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ID=61589787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711144653.7A Active CN107808790B (en) | 2017-11-17 | 2017-11-17 | Moulded case circuit breaker magnet subassembly for contact structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN107808790B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2598125Y (en) * | 2003-05-17 | 2004-01-07 | 浙江德力西电器股份有限公司 | Magnetic force driver contact system for plastic case circuit breaker |
| CN102427006A (en) * | 2011-11-08 | 2012-04-25 | 江苏辉能电气有限公司 | Contact structure for low-current molded case low-voltage circuit breaker |
| CN205069553U (en) * | 2015-09-25 | 2016-03-02 | 浙江上图电气科技有限公司 | Moulded case circuit breaker contact means |
| CN205081080U (en) * | 2015-11-06 | 2016-03-09 | 精益联合集团有限公司 | Static contact |
| FR3050311B1 (en) * | 2016-04-15 | 2020-12-04 | Schneider Electric Ind Sas | DIRECT CURRENT ELECTRIC CIRCUIT BREAKER |
| CN106971928A (en) * | 2017-05-18 | 2017-07-21 | 北京北元电器有限公司 | Arc extinguishing structure and breaker of plastic casing applied to breaker of plastic casing |
| CN208000850U (en) * | 2017-11-17 | 2018-10-23 | 河南森源电气股份有限公司 | A kind of breaker of plastic casing structure of contact terminal magnet assemblies |
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2017
- 2017-11-17 CN CN201711144653.7A patent/CN107808790B/en active Active
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| CN107808790A (en) | 2018-03-16 |
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