CN107958829B - N-pole static contact and circuit breaker with N pole - Google Patents
N-pole static contact and circuit breaker with N pole Download PDFInfo
- Publication number
- CN107958829B CN107958829B CN201711294024.2A CN201711294024A CN107958829B CN 107958829 B CN107958829 B CN 107958829B CN 201711294024 A CN201711294024 A CN 201711294024A CN 107958829 B CN107958829 B CN 107958829B
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- Prior art keywords
- static contact
- pole
- welding
- contact
- circuit breaker
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/06—Contacts characterised by the shape or structure of the contact-making surface, e.g. grooved
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- Breakers (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention discloses an N-pole static contact and a circuit breaker with the N-pole, wherein the N-pole static contact comprises a long-piece type body with a bend, one end of the body is set as a static contact connecting part, a conductive arc part is arranged by extending from the static contact connecting part, and the other end of the body is set as a wiring terminal connecting part; the body is provided with two bending parts which are twisted in the width direction, so that the body surface of the middle part of the body is twisted by about 90 degrees in the width direction relative to the body surface in the prior art. According to the structure, on one hand, the size of the N-pole static contact can be more accurately controlled to reduce the processing difficulty of the die, and the welding tool can be conveniently extended to the back of the welding part of the static contact, so that the static contact is easy to weld; on the other hand, when the N-pole static contact is installed in the shell of the circuit breaker, the large surface is used as the positioning surface, so that the positioning accuracy is improved, the plastic interlayer between the N-pole static contact and the magnetic yoke can be removed, the space of the arc extinguish chamber is enlarged, and the arc extinguish effect is improved.
Description
Technical Field
The invention relates to the technical field of circuit breakers, in particular to an N-pole static contact and a circuit breaker with the N-pole static contact.
Background
The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition for a predetermined time. Circuit breakers typically include contact systems, arc extinguishing systems, operating mechanisms, trip units, housings, and the like. In a contact system, a movable contact and a stationary contact are generally included. The circuit breaker generally includes a single-phase single wire, a single-phase double wire, a three-phase three wire, a three-phase four wire, etc., wherein the single-phase double wire, the three-phase four wire, etc., are circuit breakers with N poles. An N-pole static contact of a circuit breaker with an N-pole in the prior art is shown in fig. 1 and 2, fig. 1 is a schematic three-dimensional structure diagram of the N-pole static contact in the prior art, fig. 2 is a front view of the N-pole static contact in the prior art, the N-pole static contact comprises a body 100, the body 100 is formed by bending a strip-shaped sheet body at multiple positions along a strip-shaped direction (i.e., a length direction), a static contact connecting part 101 and an arc guiding part 102 are arranged at a front end part of the body 100, the arc guiding part 102 is used for guiding an electric arc generated between a static contact and a static contact to an arc extinguishing chamber, due to arc striking requirements, the arc guiding part 102 has a larger bending degree, a connecting part 103 used for connecting with a connecting terminal is arranged at a rear end part of the body 100 to realize connection of an external lead, a middle part 104 of the body 100 is installed in a housing, and body surfaces 107 (i.e., two planes perpendicular to a thickness direction of the body 100) of the middle part 104 of the body 100 are arranged horizontally, the static contact of this kind of the N utmost point of prior art shape is complicated, has caused the drawback that the mould processing degree of difficulty is high and the size can't be guaranteed, and because buckle many, the welding degree of difficulty of stationary contact is great during product production, and welding tool is difficult to reach the back position 105 of the welding stationary contact of static contact of N utmost point under most of the circumstances, welds the stationary contact earlier usually and buckles rectangular shape lamellar body again, has caused the processing difficulty. On the other hand, when the N-pole static contact is applied to a circuit breaker, as shown in fig. 3, fig. 3 is a schematic diagram of a part of a component of the circuit breaker with an N pole in the prior art, since the N-pole static contact 100 is installed in a housing 106 of the circuit breaker with a thickness surface of a middle portion 104 as a positioning surface, the disadvantage of inaccurate positioning is easily caused, and the N-pole static contact 100 and a magnetic yoke are installed in the housing 106 of the circuit breaker in an up-and-down distribution manner, on one hand, a plastic interlayer needs to be added between the magnetic yoke and the N-pole static contact to prevent electrical breakdown, and on the other hand, the space of an arc extinguish chamber below is greatly reduced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an N-pole static contact and a circuit breaker with the N-pole static contact, and through the structural improvement of the N-pole static contact, on one hand, the size of the N-pole static contact can be more accurately controlled to reduce the processing difficulty of a mould, and meanwhile, a welding tool can be conveniently extended to the back of a static contact welding part, so that the static contact can be easily welded; on the other hand, when the N-pole static contact is installed in the shell of the circuit breaker, the large surface is used as the positioning surface, so that the positioning accuracy is improved, the plastic interlayer between the N-pole static contact and the magnetic yoke can be removed, the space of the arc extinguish chamber is enlarged, and the arc extinguish effect is improved.
The technical scheme adopted by the invention for solving the technical problems is as follows: an N-pole static contact comprises a long-piece-shaped body with a bend, wherein one end of the body is set as a static contact connecting part, a conductive arc part is arranged by extending the static contact connecting part, and the other end of the body is set as a wiring terminal connecting part; the method is characterized in that: the body is provided with two bending parts which are twisted in the width direction, so that the body surface of the middle part of the body is twisted by about 90 degrees in the width direction relative to the body surface in the prior art.
The intermediate portion of the body is offset between a width side of the stationary contact connecting portion and a width side of the terminal connecting portion.
A circuit breaker with an N pole comprises an N pole static contact, a magnetic yoke, a shell and an arc extinguish chamber; the N-pole static contact, the magnetic yoke and the arc extinguish chamber are respectively arranged in the shell, and the arc extinguish chamber is arranged below the magnetic yoke; the N-pole static contact comprises a long-piece-shaped body with a bend, one end of the body is set as a static contact connecting part, a conductive arc part extends from the static contact connecting part, and the other end of the body is set as a wiring terminal connecting part; the method is characterized in that: the body is provided with two bending parts which are twisted in the width direction, so that the body surface of the middle part of the body is twisted by about 90 degrees in the width direction relative to the body surface in the prior art.
The middle portion of the body is offset between one side of the width of the stationary contact connection portion and one side of the width of the terminal connection portion; and the N-pole fixed contact is arranged on the shell through the body surface of the middle part.
The middle part of the N-pole fixed contact and the magnetic yoke are distributed in a staggered mode in the height direction, and the magnetic yoke deviates to the upper side, so that the space of the arc extinguish chamber is enlarged in the height direction compared with the prior art.
The body surface of the middle part of the N-pole static contact is far away from the magnetic yoke relative to a connecting line between the other side of the width of the static contact connecting part and the other side of the width of the connecting part of the wiring terminal, so that a plastic interlayer between the magnetic yoke and the N-pole static contact in the prior art can be eliminated.
Compared with the prior art, the invention has the beneficial effects that:
1. the N-pole static contact is adopted, and the body is provided with the two bending parts which are twisted in the width direction, so that the body surface of the middle part of the body is twisted by about 90 degrees in the width direction relative to the body surface in the prior art. The structure of the invention reduces the repeated bending of the strip-shaped body, can more accurately control the size of the N pole static contact so as to reduce the processing difficulty of the die, more importantly, can conveniently extend a welding tool to the back of the static contact welding part, and increases the body surface of the middle part as a positioning surface, so that the N pole static contact can be bent firstly and then welded with the static contact, the structure is simple and convenient, the operability is strong, and the welding of the static contact is easy.
2. According to the invention, the N-pole static contact is provided with the two bending parts which are twisted in the width direction on the body, so that the body surface of the middle part of the body is twisted by about 90 degrees in the width direction relative to the body surface in the prior art, and the middle part of the N-pole static contact and the magnetic yoke are distributed in a staggered manner in the height direction and the width direction.
The invention is further explained in detail with the accompanying drawings and the embodiments; however, the static contact with N-pole and the circuit breaker with N-pole of the invention are not limited to the embodiments.
Drawings
Fig. 1 is a schematic perspective view of an N-pole stationary contact in the prior art;
fig. 2 is a front view of a prior art N-pole stationary contact;
figure 3 is a schematic diagram of a portion of the components of a prior art N-pole circuit breaker;
fig. 4 is a schematic perspective view illustrating an N-pole stationary contact according to an embodiment of the present invention;
fig. 5 is a schematic perspective view of an N-pole stationary contact (rotated by an angle) according to an embodiment of the present invention;
fig. 6 is a front view of an N-pole stationary contact according to an embodiment of the present invention;
fig. 7 is a schematic view of a stationary welding contact of an N-pole stationary contact according to an embodiment of the present invention;
fig. 8 is a schematic view illustrating a circuit breaker with an N pole according to an embodiment of the present invention installed in an N pole stationary contact;
fig. 9 is a schematic diagram of a circuit breaker with an N pole according to an embodiment of the present invention, which is installed in an N pole stationary contact and a yoke.
Detailed Description
Examples
Referring to fig. 4 to 7, the N-pole stationary contact of the present invention includes a long-piece-shaped body 1 with a bend, one end of the body 1 is a stationary contact connection portion 11, and a conductive arc portion 12 is extended from the stationary contact connection portion 11, and the other end of the body is a connection terminal connection portion 13; the body is provided with two bending parts 14 and 15 which are twisted in the width direction, so that a body surface 17 of a middle part 16 of the body is twisted by about 90 degrees in the width direction relative to the body surface in the prior art; that is, the body surface 17 of the intermediate portion 16 of the body of the present invention is vertically disposed, and is twisted by approximately 90 degrees in the width direction with respect to the body surface 107 (horizontal direction) of the related art, which corresponds to approximately 90 degrees in the width direction of the entire intermediate portion 104 of the related art. The bent portions 14 and 15 are structurally formed bends, and in an actual manufacturing process, the bent portions are usually manufactured by die forming, and the bent portions at the stationary contact connection portion 11 and the bent portions at the arc guide portions 12 may be formed by bending a long sheet body.
In the present embodiment, the intermediate portion 16 of the body is offset between the width side of the stationary contact connecting portion 11 and the width side of the terminal connecting portion 13.
As shown in fig. 7, in the present invention, the body surface 17 of the middle portion 16 of the body is twisted by about 90 degrees in the width direction with respect to the body surface of the prior art, so that the welding tool 3 for welding the stationary contact 2 can easily reach the back surface 18 of the welding position of the stationary contact to perform welding, and the body surface 17 of the middle portion 16 functions as a yielding surface on one hand and also functions as a positioning surface of the welding tool 3 on the other hand, so that the welding of the contact is more stable.
According to the N-pole static contact, the body 1 is provided with the two bending parts 14 and 15 twisted in the width direction, so that the body surface 17 of the middle part 16 of the body is twisted by about 90 degrees in the width direction relative to the body surface in the prior art. The structure of the invention reduces the repeated bending of the strip-shaped body, can more accurately control the size of the N pole static contact so as to reduce the processing difficulty of the die, more importantly, can conveniently extend a welding tool to the back of the static contact welding part, and increases the body surface of the middle part as a positioning surface, so that the N pole static contact can be bent firstly and then welded with the static contact, the structure is simple and convenient, the operability is strong, and the welding of the static contact is easy.
Referring to fig. 4 to 9, the circuit breaker with an N pole according to the present invention includes an N pole stationary contact, a magnetic yoke 4, a housing 5, and an arc extinguishing chamber 6; the N-pole static contact, the magnetic yoke 4 and the arc-extinguishing chamber 6 are respectively arranged in the shell 5, and the arc-extinguishing chamber 6 is arranged below the magnetic yoke 4 (the upper part and the lower part of the invention are based on the drawing); the N-pole static contact comprises a long-piece-shaped body 1 with a bend, one end of the body 1 is provided with a static contact connecting part 11, an arc guiding part 12 is arranged by extending from the static contact connecting part, and the other end of the body 1 is provided with a wiring terminal connecting part 13; the body 1 is provided with two bent portions 14, 15 twisted in the width direction so that a body surface 17 of an intermediate portion 16 of the body is twisted by substantially 90 degrees in the width direction with respect to a body surface of the prior art.
In the present embodiment, the intermediate portion 16 of the body is offset between the width side of the stationary contact connecting portion 11 and the width side of the terminal connecting portion 13; and the stationary N-pole contact is mounted in the housing 5 through the body surface 17 of said intermediate portion 16.
In this embodiment, the middle portion 16 of the N-pole fixed contact and the magnetic yoke 4 are distributed in a staggered manner in the height direction (i.e., in the vertical direction), and the magnetic yoke 4 is deviated to the upper side, so that the space of the arc extinguish chamber 6 is enlarged in the height direction compared with the prior art. The body surface of the middle part 16 of the N-pole static contact is far away from the magnetic yoke 4 relative to the connecting line between the other side of the width of the static contact connecting part and the other side of the width of the connecting part of the wiring terminal, so that the electrical requirement can be met in space between the middle part 16 of the N-pole static contact and the magnetic yoke 4, the plastic interlayer between the magnetic yoke and the N-pole static contact in the prior art can be eliminated, and the upward space of the arc extinguish chamber in the prior art is enlarged in the height direction; the arc-extinguishing grid pieces in the arc-extinguishing chambers can be increased, and meanwhile, because the plastic interlayer between the magnet yoke and the N-pole static contact is eliminated, the two original arc-extinguishing chambers can be combined into one to increase the size of the arc-extinguishing grid pieces.
The invention relates to a circuit breaker with an N pole, which adopts an N pole static contact, wherein two bending parts 14 and 15 which are twisted in the width direction are arranged on a body, so that a body surface 17 of a middle part 16 of the body is twisted by about 90 degrees in the width direction relative to the body surface in the prior art, and the middle part 16 of the N pole static contact and a magnetic yoke 4 are simultaneously distributed in a staggered manner in the height direction and the width direction (which refers to the front-back direction of a drawing surface).
The foregoing is considered as illustrative of the preferred embodiments of the invention and is not to be construed as limiting the invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or equivalent modifications, without departing from the scope of the disclosed embodiments. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (6)
1. An N-pole static contact of a miniature circuit breaker comprises a long-piece type body with a bend, wherein one end of the body is set as a static contact connecting part, an arc guide part is arranged by extending from the static contact connecting part, and the other end of the body is set as a wiring terminal connecting part; the method is characterized in that: the body is provided with two bending parts which are twisted in the width direction, the body surface of the long-strip-shaped middle part of the body is twisted by approximately 90 degrees in the width direction so as to give way when the welding tool extends to the back of a static contact welding position to realize static contact welding, the body surface of the long-strip-shaped middle part of the body is set as a positioning surface matched with the long-strip-shaped shape of the welding tool for welding the back of the static contact, and the long-strip-shaped welding tool is limited in a preset area by utilizing the matching of the positioning surface and the two bending parts, so that the contact welding is more stable, and the size of the N-pole static contact can be more accurately controlled.
2. The stationary N-pole contact of a miniature circuit breaker as set forth in claim 1, wherein: the intermediate portion of the body is offset between a width side of the stationary contact connecting portion and a width side of the terminal connecting portion.
3. A miniature circuit breaker with an N pole comprises an N pole static contact, a magnetic yoke, a shell and an arc extinguish chamber; the N-pole static contact, the magnetic yoke and the arc extinguish chamber are respectively arranged in the shell, and the arc extinguish chamber is arranged below the magnetic yoke; the N-pole static contact comprises a long-piece-shaped body with a bend, one end of the body is set as a static contact connecting part, a conductive arc part extends from the static contact connecting part, and the other end of the body is set as a wiring terminal connecting part; the method is characterized in that: the body is provided with two bending parts which are twisted in the width direction, the body surface of the long-strip-shaped middle part of the body is twisted by approximately 90 degrees in the width direction so as to give way when the welding tool extends to the back of a static contact welding position to realize static contact welding, the body surface of the long-strip-shaped middle part of the body is set as a positioning surface matched with the long-strip-shaped shape of the welding tool for welding the back of the static contact, and the long-strip-shaped welding tool is limited in a preset area by utilizing the matching of the positioning surface and the two bending parts, so that the contact welding is more stable, and the size of the N-pole static contact can be more accurately controlled.
4. A miniature circuit breaker with N-pole according to claim 3, characterized in that: the middle portion of the body is offset between one side of the width of the stationary contact connection portion and one side of the width of the terminal connection portion; and the N-pole fixed contact is arranged on the shell through the body surface of the middle part.
5. A miniature circuit breaker with N-pole according to claim 4, characterized in that: the middle part of the N-pole fixed contact and the magnetic yoke are distributed in a staggered mode in the height direction, and the magnetic yoke deviates to the upper side, so that the space of the arc extinguish chamber is enlarged in the height direction.
6. A miniature circuit breaker with N-pole according to claim 5, characterized in that: the body surface of the middle part of the N-pole static contact is far away from the magnet yoke relative to a connecting line between the other side of the width of the static contact connecting part and the other side of the width of the connecting part of the wiring terminal, so that a plastic interlayer originally arranged between the magnet yoke and the N-pole static contact is eliminated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711294024.2A CN107958829B (en) | 2017-12-08 | 2017-12-08 | N-pole static contact and circuit breaker with N pole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711294024.2A CN107958829B (en) | 2017-12-08 | 2017-12-08 | N-pole static contact and circuit breaker with N pole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107958829A CN107958829A (en) | 2018-04-24 |
| CN107958829B true CN107958829B (en) | 2021-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711294024.2A Active CN107958829B (en) | 2017-12-08 | 2017-12-08 | N-pole static contact and circuit breaker with N pole |
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| Country | Link |
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| CN (1) | CN107958829B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102610454A (en) * | 2012-03-08 | 2012-07-25 | 江苏辉能电气有限公司 | Upper inlet stationary contact device of molded case circuit breaker |
| CN102800539A (en) * | 2012-08-13 | 2012-11-28 | 江苏辉能电气有限公司 | Movable static contact structure of small current moulded case circuit breaker with current limiting device |
| EP2980822A1 (en) * | 2014-07-30 | 2016-02-03 | Siemens Aktiengesellschaft | Protective switch device and magnetic yoke |
| CN206003729U (en) * | 2016-12-01 | 2017-03-08 | 伊顿电气有限公司 | Static contact, arc extinguishing external member and chopper |
| CN207558730U (en) * | 2017-12-08 | 2018-06-29 | 厦门宏发开关设备有限公司 | N poles static contact and its breaker with N poles |
| CN208077921U (en) * | 2018-02-07 | 2018-11-09 | 浙江正泰电器股份有限公司 | Breaker |
-
2017
- 2017-12-08 CN CN201711294024.2A patent/CN107958829B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102610454A (en) * | 2012-03-08 | 2012-07-25 | 江苏辉能电气有限公司 | Upper inlet stationary contact device of molded case circuit breaker |
| CN102800539A (en) * | 2012-08-13 | 2012-11-28 | 江苏辉能电气有限公司 | Movable static contact structure of small current moulded case circuit breaker with current limiting device |
| EP2980822A1 (en) * | 2014-07-30 | 2016-02-03 | Siemens Aktiengesellschaft | Protective switch device and magnetic yoke |
| CN206003729U (en) * | 2016-12-01 | 2017-03-08 | 伊顿电气有限公司 | Static contact, arc extinguishing external member and chopper |
| CN207558730U (en) * | 2017-12-08 | 2018-06-29 | 厦门宏发开关设备有限公司 | N poles static contact and its breaker with N poles |
| CN208077921U (en) * | 2018-02-07 | 2018-11-09 | 浙江正泰电器股份有限公司 | Breaker |
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| Publication number | Publication date |
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| CN107958829A (en) | 2018-04-24 |
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