CN107799368B - Contact structure of plastic case circuit breaker - Google Patents
Contact structure of plastic case circuit breaker Download PDFInfo
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- CN107799368B CN107799368B CN201711145756.5A CN201711145756A CN107799368B CN 107799368 B CN107799368 B CN 107799368B CN 201711145756 A CN201711145756 A CN 201711145756A CN 107799368 B CN107799368 B CN 107799368B
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- China
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- iron core
- circuit breaker
- case circuit
- core shell
- contact structure
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- 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
- H01H73/04—Contacts
Abstract
The invention relates to a contact structure of a plastic case circuit breaker, which comprises a fixed contact, wherein one end of the fixed contact is a U-shaped bent end with a U-shaped concave cavity, the contact structure also comprises a magnet assembly arranged in the U-shaped concave cavity, a contact bottom hole is arranged on the bottom wall of the U-shaped bent end, a magnet bottom hole corresponding to the contact bottom hole is arranged at the bottom of the magnet assembly, and the contact structure of the plastic case circuit breaker also comprises a positioning column which is inserted into the contact bottom hole and the magnet bottom hole to position the magnet assembly. During assembly, the magnet assembly is firstly installed in the U-shaped concave cavity of the U-shaped bent end, then the static contact is installed on the positioning column, and the positioning column penetrates through the bottom hole of the contact and is connected in the bottom hole of the magnet; when the magnet assembly is disassembled, the positioning column is disassembled, and the magnet assembly is horizontally moved out of the U-shaped concave cavity. Compared with the prior art, the connecting structure is simple, and the magnet assembly is convenient to disassemble and assemble.
Description
Technical Field
The invention relates to a contact structure 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 utility model discloses a chinese utility model patent that the notice number is CN206312854U, the announcement day is 2017.07.07 discloses a contact device of circuit breaker, including static contact and moving contact, static contact one end is the end of buckling of U-shaped, is equipped with the magnet subassembly in the cavity that the U-shaped was buckled, and the magnet subassembly includes the iron core and supplies the iron core shell of iron core installation, and it is protruding to be equipped with the bottom on the diapire of iron core shell, is equipped with the recess that supplies the protruding embedding in bottom of iron core shell on the diapire of the end is buckled to the U-shaped, realizes the location to the magnet subassembly through the cooperation of bottom.
The problem that the breaking capacity of an existing molded case circuit breaker is low and the breaking reliability is not high can be solved well by arranging the magnet assembly in the U-shaped bending end of the fixed contact. However, because the height space in the U-shaped bent end of the static contact is smaller, the thickness of the magnet assembly cannot be too thick, the iron core cannot be set too much, and the U-shaped bent end influences the installation of the magnet assembly during the installation, so that the installation is inconvenient.
Disclosure of Invention
The invention aims to provide a contact structure of a molded case circuit breaker, which is used for solving the problem that a magnet assembly is inconvenient to install in the contact structure of the existing molded case circuit breaker.
In order to achieve the purpose, the scheme 1 of the contact structure of the molded case circuit breaker is as follows: the contact structure of the plastic case circuit breaker comprises a fixed contact, one end of the fixed contact is a U-shaped bending end with a U-shaped cavity, the contact structure of the plastic case circuit breaker further comprises a magnet assembly arranged in the U-shaped cavity, a contact bottom hole is formed in the bottom wall of the U-shaped bending end, a magnet bottom hole corresponding to the contact bottom hole is formed in the bottom of the magnet assembly, and the contact structure of the plastic case circuit breaker further comprises a positioning column which is used for being inserted into the contact bottom hole and the magnet bottom hole to position the magnet assembly.
Scheme 2 is, according to scheme 1 moulded case circuit breaker contact structure, moulded case circuit breaker contact structure still including be used for right the U-shaped end of buckling carries out the support piece that supports, the reference column sets up on support piece.
Scheme 3 is, according to scheme 2 moulded case circuit breaker contact structure, the magnet subassembly includes the iron core that sets up more than two side by side and is used for carrying out the iron core shell of circumference location to the iron core, is equipped with the confession on the iron core shell the reference column male casing bottom hole.
Scheme 4 is, according to scheme 3 moulded case circuit breaker contact structure, the iron core shell is the rectangle casing that the opening up, the casing bottom hole sets up on the diapire of iron core shell, each the iron core is perpendicular to the diapire setting of iron core shell.
Scheme 7 is, according to the molded case circuit breaker contact structure of scheme 5 or 6, the positioning column is a hollow structure.
Scheme 8 is, according to scheme 4 or 5 or 6 moulded case circuit breaker contact structure, 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 upwards 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 apply axial tension.
Scheme 10 is that, according to the molded case circuit breaker contact structure of scheme 9, the lower opening edge of the notch is connected with an outward flange turned over toward the outside of the iron core shell.
The invention has the beneficial effects that: during assembly, the magnet assembly is firstly installed in the U-shaped concave cavity of the U-shaped bent end, then the static contact is installed on the positioning column, and the positioning column penetrates through the bottom hole of the contact and is connected in the bottom hole of the magnet; when the magnet assembly is disassembled, the positioning column is disassembled, and the magnet assembly is horizontally moved out of the U-shaped concave cavity. Compared with the prior art, the connecting structure is simple, and the magnet assembly is convenient to disassemble and assemble.
Further, the magnet assembly comprises more than two iron cores arranged in parallel and an iron core shell arranged on the periphery of each iron core for circumferentially fixing the iron cores, and the iron core shell is provided with a through hole for the positioning column to pass through; the number of the iron cores is increased, and the magnetic blowing effect is enhanced.
Further, the iron cores are vertically arranged in the iron core shell, and because the height space in the U-shaped concave cavity is limited, the space in the height direction for the iron cores to be arranged side by side is smaller, and more iron cores can be arranged in a vertical side by side arrangement mode.
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 a schematic structural diagram of a first embodiment of a contact structure of a molded case circuit breaker according to the present invention;
fig. 2 is an assembly view of a stationary contact and a 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.
The first embodiment of the contact structure of the molded case circuit breaker of the invention, as shown in fig. 1 to 7, comprises a circuit breaker body 16, a static contact 1 and a support member 6, wherein one end of the static contact 1 is provided with a connecting hole for connecting with a base of the circuit breaker, the other end is a U-shaped bent end, the U-shaped bent end is provided with a U-shaped concave cavity, and the top of the U-shaped bent 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, 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.
Compare in prior art, 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 effective arc extinguishing to can strengthen the disconnected reliability of circuit breaker, and improve its breaking capacity.
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.
In other embodiments, the support is not provided, and the positioning pillar may be provided on another component of the molded case circuit breaker, for example, the positioning pillar is provided on the circuit breaker body.
Claims (6)
1. Moulded case circuit breaker contact structure, including the static contact, the end is buckled for the U-shaped that has the U-shaped cavity to the one end of static contact, still including setting up the magnet subassembly in the U-shaped cavity, be equipped with contact bottom outlet, its characterized in that on the diapire of the end is buckled to the U-shaped: the bottom of magnet subassembly be equipped with the corresponding magnet bottom hole of contact bottom hole, moulded case circuit breaker contact structure still including be used for inserting in contact bottom hole and the magnet bottom hole in order to carry out the reference column of fixing a position to the magnet subassembly, the reference column is fixed a position the magnet subassembly, moulded case circuit breaker contact structure still including being used for right the support piece that the end supported is buckled to the U-shaped, the reference column sets up on support piece, the magnet subassembly includes more than two iron cores that set up side by side and is used for carrying out the iron core shell of circumference location, is equipped with the confession on the iron core shell the reference column male casing bottom hole, the iron core shell is opening up's rectangle casing, the casing bottom hole sets up on the diapire of iron core shell, each the iron core is perpendicular to the diapire setting of iron core shell, the cross section of reference column is oval shape, each the iron core perpendicular to oval cross-section length direction sets up and the iron core The groove of (2).
2. The molded case circuit breaker contact structure of claim 1, wherein: the iron core is characterized in that steps used for stopping and limiting the top of the iron core shell when the iron core is installed are arranged on two vertical edges of the iron core, and the steps are provided with downward stopping surfaces.
3. The molded case circuit breaker contact structure of claim 1, wherein: the positioning column is of a hollow structure.
4. The molded case circuit breaker contact structure of claim 1, wherein: the rivet that is equipped with the face setting of perpendicular to iron core on the iron core perforates, be equipped with the confession of ascending on the lateral wall of iron core shell the incision of rivet embedding, iron core shell be close to notched terminal surface supplies the rivet to apply axial tension.
5. The molded case circuit breaker contact structure of claim 4, 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.
6. The molded case circuit breaker contact structure of claim 5, wherein: the lower opening edge of the notch is connected with an outward flange which is turned towards the outer side of the iron core shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711145756.5A CN107799368B (en) | 2017-11-17 | 2017-11-17 | Contact structure of plastic case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711145756.5A CN107799368B (en) | 2017-11-17 | 2017-11-17 | Contact structure of plastic case circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107799368A CN107799368A (en) | 2018-03-13 |
| CN107799368B true CN107799368B (en) | 2020-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711145756.5A Active CN107799368B (en) | 2017-11-17 | 2017-11-17 | Contact structure of plastic case circuit breaker |
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| Country | Link |
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| CN (1) | CN107799368B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103681122A (en) * | 2012-09-11 | 2014-03-26 | Ls产电株式会社 | Stationary contact arm assembly for molded case circuit breaker |
| CN205081080U (en) * | 2015-11-06 | 2016-03-09 | 精益联合集团有限公司 | Static contact |
| CN205104458U (en) * | 2015-11-06 | 2016-03-23 | 派森特电气有限公司 | Breaker contact system |
| CN205582867U (en) * | 2016-03-16 | 2016-09-14 | 北京北元电器有限公司 | Be applied to moulded case circuit breaker's magnetic blow -out structure and moulded case circuit breaker |
| CN205789824U (en) * | 2016-03-04 | 2016-12-07 | 温州中菱电器有限公司 | The conducting system current limliting of a kind of case circuit breaker scolds opening apparatus |
| CN206312854U (en) * | 2017-01-06 | 2017-07-07 | 常熟开关制造有限公司(原常熟开关厂） | The contact apparatus of breaker |
| CN206516591U (en) * | 2017-01-11 | 2017-09-22 | 浙江正泰电器股份有限公司 | A kind of current-limiting type static contact structure |
| EP3232457A1 (en) * | 2016-04-15 | 2017-10-18 | Schneider Electric Industries SAS | Dc electrical circuit breaker |
| CN207611729U (en) * | 2017-11-17 | 2018-07-13 | 河南森源电气股份有限公司 | A kind of breaker of plastic casing structure of contact terminal |
-
2017
- 2017-11-17 CN CN201711145756.5A patent/CN107799368B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103681122A (en) * | 2012-09-11 | 2014-03-26 | Ls产电株式会社 | Stationary contact arm assembly for molded case circuit breaker |
| CN205081080U (en) * | 2015-11-06 | 2016-03-09 | 精益联合集团有限公司 | Static contact |
| CN205104458U (en) * | 2015-11-06 | 2016-03-23 | 派森特电气有限公司 | Breaker contact system |
| CN205789824U (en) * | 2016-03-04 | 2016-12-07 | 温州中菱电器有限公司 | The conducting system current limliting of a kind of case circuit breaker scolds opening apparatus |
| CN205582867U (en) * | 2016-03-16 | 2016-09-14 | 北京北元电器有限公司 | Be applied to moulded case circuit breaker's magnetic blow -out structure and moulded case circuit breaker |
| EP3232457A1 (en) * | 2016-04-15 | 2017-10-18 | Schneider Electric Industries SAS | Dc electrical circuit breaker |
| CN206312854U (en) * | 2017-01-06 | 2017-07-07 | 常熟开关制造有限公司(原常熟开关厂） | The contact apparatus of breaker |
| CN206516591U (en) * | 2017-01-11 | 2017-09-22 | 浙江正泰电器股份有限公司 | A kind of current-limiting type static contact structure |
| CN207611729U (en) * | 2017-11-17 | 2018-07-13 | 河南森源电气股份有限公司 | A kind of breaker of plastic casing structure of contact terminal |
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| CN107799368A (en) | 2018-03-13 |
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