CN218918761U - Circuit breaker and tripping device thereof - Google Patents
Circuit breaker and tripping device thereof Download PDFInfo
- Publication number
- CN218918761U CN218918761U CN202223052832.7U CN202223052832U CN218918761U CN 218918761 U CN218918761 U CN 218918761U CN 202223052832 U CN202223052832 U CN 202223052832U CN 218918761 U CN218918761 U CN 218918761U
- Authority
- CN
- China
- Prior art keywords
- heating element
- base
- segment
- trip
- conduction piece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Breakers (AREA)
Abstract
The utility model discloses a circuit breaker and a tripping device thereof, wherein the tripping device comprises a tripping assembly and a base, the tripping assembly comprises a magnetic conduction piece, a heating element and a bimetallic strip, and the heating element and the bimetallic strip are fixed together with the magnetic conduction piece and are relatively fixed with the base through the magnetic conduction piece; the magnetic conduction piece comprises a bending part which is bent back to the heating element, and the bending part is fixedly connected with the base. By the aid of the scheme, the mounting reliability of the tripping assembly and the base can be improved, and meanwhile, the limitation on the material selection and thickness of the heating element is reduced.
Description
Technical Field
The utility model relates to the technical field of electricity, in particular to a circuit breaker and a tripping device thereof.
Background
The circuit breaker is mainly used for overcurrent protection of a circuit, the overcurrent protection is divided into overload protection and short-circuit protection, and related structures of the overload protection and the short-circuit protection are generally integrated together to form a tripping assembly, and the tripping assembly is installed on a base inside the circuit breaker.
The mounting structure of current tripping device and base is: a threaded hole is formed in the heating element of the trip assembly, and a screw passes through the threaded hole to fix the heating element on the base. However, the heating element is often made of copper or copper alloy, and has low hardness, especially when the thickness of the heating element is small, the strength of the threaded hole of the heating element becomes small, the fastening requirement is difficult to meet, the product is easy to damage, and in addition, the material selection and the thickness setting of the heating element are also greatly limited.
Disclosure of Invention
The utility model aims to provide a circuit breaker and a tripping device thereof, which are beneficial to improving the installation reliability of a tripping assembly and a base through structural optimization and reducing the limitation on heating elements.
In order to solve the technical problems, the utility model provides a tripping device, which comprises a tripping assembly and a base, wherein the tripping assembly comprises a magnetic conduction piece, a heating element and a bimetallic strip, and the heating element and the bimetallic strip are fixed together with the magnetic conduction piece and are fixed relative to the base through the magnetic conduction piece; the magnetic conduction piece comprises a bending part which is bent back to the heating element, and the bending part is fixedly connected with the base.
According to the tripping device, the tripping assembly comprises the armature bracket, the heating element is located between the bimetallic strip and the magnetic conduction piece, the heating element, the magnetic conduction piece and the armature bracket are fixedly connected through the first fastening piece, and the heating element and the bimetallic strip are fixedly connected through the second fastening piece.
According to the tripping device, the armature bracket is provided with the protrusion, and the base is provided with the clamping groove matched with the protrusion.
According to the tripping device, the magnetic conduction piece comprises the main body part, the bottom of the main body part is connected with the bending part, and the main body part is fixedly connected with the magnetic conduction piece and the armature bracket.
In the trip device, the bending part is not lower than the bottom surface of the heating element.
According to the tripping device, the heating element comprises the first section part and the second section part which are integrally formed, the first section part is located above the second section part, the first section part is fixedly connected with the magnetic conduction piece and the armature bracket, and the second section part is fixedly connected with the bimetallic strip.
In the trip device, the first section is at least partially in surface contact with the magnetic conductive member.
As with the trip device described above, the second segment is at least partially in surface contact with the bi-metallic strip.
As described above, the first section is remote from the bimetal relative to the second section.
The utility model also provides a circuit breaker comprising the tripping device of any one of the above, wherein the tripping device is positioned in a shell of the circuit breaker.
Compared with the prior art, the utility model has the following technical effects:
firstly, the tripping device is connected with a base through a magnetic conduction piece to realize the installation of the tripping assembly and the base, specifically, a heating element and a bimetallic strip are fixed together with the magnetic conduction piece, and then the bending part of the magnetic conduction piece back to the heating element is fixedly connected with the base, namely, the heating element and the bimetallic strip are relatively fixed with the base through the magnetic conduction piece, so that the connection hole is arranged on the heating element of the tripping assembly, and the limitation of the heating element in terms of material selection, thickness and the like due to the connection requirement is avoided; meanwhile, the hardness of the magnetic conduction piece is relatively high, so that the reliability of connection between the magnetic conduction piece and the base is improved, and the qualification rate of products is improved. Meanwhile, the bending part for fixing the magnetic conduction piece and the base is arranged back to the heating element, so that a gap is reserved between the heating element and the wall part (such as the bottom wall) of the base, the temperature rise of the adjacent part of the base and the heating element can be effectively controlled, and the working reliability of a product is improved.
In an alternative scheme of the utility model, the heating element is at least partially in surface contact with the magnetic conduction piece, so that the magnetic field environment around the conductive loop can be improved, and the influence of the magnetic field between adjacent conductive loops can be reduced during the serial phase verification of the short circuit protection, so that the short circuit protection characteristic is more stable and reliable.
Furthermore, in another alternative of the utility model, the heating element is in at least partial surface contact with the bimetal to ensure that the bimetal obtains sufficient heat through the heating element to ensure reliable operation of the overload protection feature of the circuit breaker.
Drawings
FIG. 1 is a schematic partial cross-sectional view of a trip assembly and a housing with a base according to an embodiment;
FIG. 2 is a schematic diagram of the trip assembly of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the trip assembly of FIG. 2;
FIG. 4 is a schematic view of the components forming the conductive loop of FIG. 2;
FIG. 5 is a schematic diagram of the heat generating element of FIG. 2;
FIG. 6 is a schematic diagram of the magnetic conductive member of FIG. 2;
fig. 7 is a schematic view of the armature bracket of fig. 2;
fig. 8 is a schematic structural view of a housing with a base in an embodiment.
Reference numerals illustrate:
a first segment 131, a first hole 1311, a second segment 132, a second hole 1321, and a bent piece 133;
a main body 151, a third hole 1511, a bent portion 152, and a connection hole 1521;
a projection 161, a fourth hole 162;
a housing 200, a base 201, a mounting surface 211, and a locking groove 212;
Detailed Description
In order to better understand the aspects of the present utility model, the present utility model will be described in further detail with reference to the accompanying drawings and detailed description.
For ease of understanding and simplicity of description, the following description is provided in connection with a circuit breaker and trip device thereof.
The circuit breaker is mainly used for overcurrent protection of a circuit, and a tripping device is usually arranged on the circuit breaker to detect power supply abnormality. Overcurrent protection for circuit breakers is divided into overload protection and short circuit protection, and the related structures of these two protections are integrated together to form a trip assembly, which is typically mounted on a base inside the casing of the circuit breaker.
Referring to fig. 1 and 2, fig. 1 is a schematic partial cross-sectional view of a trip device and a housing with a base according to an embodiment; fig. 2 is a schematic structural view of the trip assembly of fig. 1.
In this embodiment, the trip assembly 100 of the circuit breaker is mounted on a base 201 in a housing 200, and in the illustrated embodiment, the base 201 is integrally formed with the housing 200, that is, the base 201 and the housing 200 are an integral component; in other embodiments, the base 201 may be separately formed and then fixed to the housing 200.
The trip assembly 100 of the trip device comprises a magnetic conductive member 105, a heating element 103 and a bimetallic strip 104, wherein the heating element 103 and the bimetallic strip 104 are fixed with the magnetic conductive member 105 and are relatively fixed with a base 201 through the magnetic conductive member 105, that is, the heating element 103 is not directly connected with the base 201.
After the arrangement, the installation of the tripping assembly 100 and the base 201 is realized through the fixed connection of the magnetic conduction piece 105 and the base 201, and the arrangement of the threaded holes for connection on the heating element 103 is avoided, so that the limitation on the material selection, thickness and the like of the heating element 103 due to the connection requirement is eliminated, and the heating element 103 can be made of the material with relatively smaller thickness and relatively lower strength according to the application requirement; meanwhile, the hardness of the magnetic conductive piece 105 is relatively high, so that the connection reliability of the magnetic conductive piece and the base 102 is high, and the qualification rate of products is improved. Meanwhile, the bending part 152 for fixing the magnetic conduction piece 105 and the base 201 is arranged back to the heating element 103, so that a gap is reserved between the heating element 103 and the wall part (such as the bottom wall) of the base 201, the temperature rise of the adjacent part of the base 201 and the heating element 103 can be effectively controlled, and the working reliability of a product is improved.
In this embodiment, the magnetic conductive member 105 includes a bending portion 152 that is bent away from the heating element 103, and the magnetic conductive member 105 is fixedly connected to the base 201 through the bending portion 152. In this way, the height position of the bending portion 152 of the magnetic conductive member 105 is not affected by the heating element 103, and the magnetic conductive member can be flexibly set according to the structure of the base 201, and is convenient to install. Meanwhile, a condition is provided for the fixed position of the magnetic conduction piece 105 to be far away from the bottom of the base 201, so that the temperature rise of the bottom of the base 201 can be reduced to meet relevant regulations.
Specifically, the bending portion 152 of the magnetic conductive member 105 is not lower than the bottom surface of the heating element 103, and after being mounted in cooperation with the base 201, the mounting position of the magnetic conductive member 105 and the base can be prevented from being lower than the heating element 103, so that the dimension of the trip assembly 100 in the height direction is reduced, and meanwhile, the dimension of the housing 100 in the height direction is reduced, which is beneficial to miniaturization design of a circuit breaker. As can be understood from fig. 1, if the bending portion 152 of the magnetic conductive member 105 is bent towards the direction of the heating element 103, the bending portion 152 of the magnetic conductive member 152 needs to extend to the bottom of the heating element 103 and then to be mounted in cooperation with the base 201, so that the thickness of the whole base 201 tends to be increased, and the dimension of the housing 200 in the height direction is increased, so that the bending portion 152 is disposed away from the heating element 103 and is not lower than the bottom surface of the heating element 103, which is beneficial to reducing the overall dimension of the circuit breaker.
In practical applications, the cost of iron is low, so the magnetic conductive member 105 is a core, and of course, other materials with magnetic conductive function can be selected according to the requirement.
Referring to fig. 3 to 7 together, fig. 3 is a schematic cross-sectional view of the trip assembly shown in fig. 2; FIG. 4 is a schematic view of the components forming the conductive loop of FIG. 2; FIG. 5 is a schematic diagram of the heat generating element of FIG. 2; FIG. 6 is a schematic diagram of the magnetic conductive member of FIG. 2; fig. 7 is a schematic view of the armature bracket of fig. 2.
In this embodiment, the trip assembly 100 further includes a moving contact 101, a soft coupling 102, and an armature 107, where the moving contact 101 is connected to one end of the heating element 103 through the soft coupling 102, and the heating element 103 is connected to the bimetal 104. In general, the other end of the heating element 103 is fixedly connected with the connecting plate 109 by welding, and when assembled, the connecting plate 109 can be connected with the base 201, and the connection of the magnetic conductive member 105 and the base 201 can be combined, so that the firmness between the trip assembly 100 and the base 201 can be improved.
The moving contact 101, the soft connection 102, the heating element 103 and the connecting plate 109 mainly form a conductive loop of the tripping assembly 100, when current flows, the heating element 103 generates heat, the larger the current is, the larger the heat generated by the heating element 103 is, the heat generated by the heating element 103 is transferred to the bimetallic strip 104, and after the bimetallic strip 104 is heated and bent, the traction rod is pushed to realize tripping operation of the circuit breaker. Here, the specific implementation of the trip operation of the trip assembly 100 is not a core point of the present application, and those skilled in the art can implement the trip operation based on the prior art, and will not be described herein.
In this embodiment, the trip assembly 100 further includes an armature bracket 106 coupled to the magnetically permeable member 105 for mounting the armature 107 and an armature spring 108 for resetting the armature 107. The specific structure of the armature bracket 106 is not a core point of the present application, and those skilled in the art can implement it based on the prior art and practical needs, and will not be described in detail.
In this embodiment, the heating element 103 is located between the bimetal 104 and the magnetic conductive member 105, the heating element 103, the magnetic conductive member 105 and the armature bracket 106 are riveted and fixed by the first rivet 321, and the heating element 103 and the bimetal 104 are riveted and fixed by the second rivet 322, so that the bimetal 104 is also fixed relative to the magnetic conductive member 105.
As shown in fig. 5, the heating element 103 includes a first segment 131 and a second segment 132 that are integrally formed, the first segment 131 is located above the second segment 132, a first hole 1311 is provided in the first segment 131 so as to be riveted with the magnetic conductive member 105 and the armature bracket 106, and a second hole 1321 is provided in the second segment 132 so as to be riveted with the bimetal 104. The bottom of the second section 132 of the heating element 103 may also be bent towards the moving contact 101 to form a bent piece 133, so as to connect with the flexible connection 102.
As shown in fig. 6, the magnetic conductive member 105 includes a main body 151 and the bending portion 152, the bending portion 152 is located at the bottom of the main body 151, the bending portion 152 may be integrally formed with the main body 151, and is formed by bending from the bottom end of the main body 151, and a third hole 1511 is provided in the main body 151. In this example, the main body 151 has a substantially U-shaped structure, and the opening thereof faces the direction in which the heating element 103 is located.
As shown in fig. 7, the armature bracket 106 is also generally U-shaped, and the main body 151 of the magnetic conductive member 105 is positioned in the opening of the armature bracket 106, and the armature bracket 106 is provided with a fourth hole 162.
The first hole 1311, the third hole 1511 and the fourth hole 162 are positioned correspondingly, and when assembled, the first rivet 321 passes through the fourth hole 162, the third hole 1511 and the first hole 1311 to anchor the first segment 131, the body 151 and the armature bracket 106 together.
In the drawing, the heating element 103, the magnetic conductive member 105 and the armature bracket 106 are riveted by two first rivets 321, that is, the first hole 1311, the third hole 1511 and the fourth hole 162 are provided with two first rivets 321 arranged in the up-down direction to ensure the reliability of the connection of the heating element 103, the magnetic conductive member 105 and the armature bracket 106. In other embodiments, the number and arrangement of the first rivets 321 is not limited. Of course, other fasteners, such as bolts, may be used in addition to riveting.
The bimetal 104 is also provided with rivet holes at positions corresponding to the aforementioned second holes 1321, so that the second rivet 322 anchors the bimetal 104 and the heating element 103, and in the drawing, the second rivet 322 is also provided with two.
When specifically arranged, the second section 132 of the heating element 103 is close to the bimetal 104 relative to the first section 131, which is understood in conjunction with fig. 3, so that the first rivet 321 anchoring the first section 131, the magnetic conductive member 105 and the armature bracket 106 can avoid interfering with the bimetal 104.
In this embodiment, the first section 131 of the heating element 103 is at least partially in surface contact with the magnetic conductive member 105, so that a magnetic loop generated when a current flows through the heating element 103 flows through the magnetic conductive member 105 with higher magnetic conductivity, which can reduce the influence on an adjacent magnetic field, is beneficial to improving the stability and precision of the short-circuit protection characteristic of the trip assembly 100, reduces the requirement on the action current threshold of the trip assembly 100, and is beneficial to reducing the production difficulty.
In this embodiment, the second section 132 of the heating element 103 is at least partially in surface contact with the bimetal 104, so that it is ensured that the bimetal 104 obtains sufficient heat through the heating element 103 to ensure reliable operation of the overload protection feature of the circuit breaker.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a housing with a base in an embodiment.
In this embodiment, an installation surface portion 211 for assembling with the trip assembly 100 is provided on the base 201, after the trip assembly 100 is placed in a corresponding space in the housing 200, the bending portion 152 of the magnetic conductive member 105 may be supported by the installation surface portion 211 and fixedly connected with the installation surface portion 211, specifically, a connection hole 1521 is provided on the bending portion 152, the installation surface portion 211 is correspondingly provided with a through hole, the screw 301 passes through the through hole of the installation surface portion 211 and the connection hole 1521 of the bending portion 152 to connect the two, and obviously, the connection hole 1521 is a threaded hole capable of being connected with the screw 301 by threads.
Specifically, the above-mentioned armature bracket 106 may be provided with a protrusion 161, and a clamping groove 212 is provided at a corresponding position of the base 201, so that when the trip assembly 100 and the base 201 are assembled, the protrusion 161 of the armature bracket 106 may be clamped into the clamping groove 212, thereby providing support for the armature bracket 106, and being beneficial to the reliability of assembly. The number and arrangement positions of the protrusions 161 may be adaptively set according to the structure of the armature bracket 106, and the clamping grooves 212 are also matched and arranged, not limited to the illustration.
The circuit breaker and the tripping device thereof provided by the utility model are described in detail. The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.
Claims (10)
1. The tripping device is characterized by comprising a tripping assembly and a base, wherein the tripping assembly comprises a magnetic conduction piece, a heating element and a bimetallic strip, and the heating element and the bimetallic strip are fixed together with the magnetic conduction piece and are fixed relative to the base through the magnetic conduction piece; the magnetic conduction piece comprises a bending part which is bent back to the heating element, and the bending part is fixedly connected with the base.
2. The trip unit of claim 1, wherein the trip assembly includes an armature bracket, the heating element is positioned between the bimetal and the magnetically permeable member, the heating element, the magnetically permeable member, and the armature bracket are fixedly connected by a first fastener, and the heating element and the bimetal are fixedly connected by a second fastener.
3. The trip unit of claim 2, wherein said armature bracket is provided with a protrusion and said base is provided with a detent cooperating with said protrusion.
4. The trip device of claim 2, wherein the magnetic conductive member includes a main body portion, the bottom of the main body portion is connected to the bending portion, and the main body portion is fixedly connected to the magnetic conductive member and the armature bracket.
5. The trip device of any one of claims 1-4, wherein the bent portion is not lower than a bottom surface of the heat generating element.
6. The trip unit of any one of claims 2-4, wherein the heating element includes an integrally formed first segment and second segment, the first segment being located above the second segment, the first segment being fixedly connected to the magnetic conductive member and the armature bracket, the second segment being fixedly connected to the bimetal.
7. The trip device of claim 6 wherein said first segment is in at least partial surface contact with said magnetically permeable member.
8. The trip device of claim 6 wherein the second segment is in at least partial surface contact with the bimetal.
9. The trip device of claim 6, wherein the first segment is remote from the bimetal relative to the second segment.
10. A circuit breaker comprising a trip unit according to any one of claims 1-9, said trip unit being located within a housing of said circuit breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223052832.7U CN218918761U (en) | 2022-11-16 | 2022-11-16 | Circuit breaker and tripping device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223052832.7U CN218918761U (en) | 2022-11-16 | 2022-11-16 | Circuit breaker and tripping device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218918761U true CN218918761U (en) | 2023-04-25 |
Family
ID=86009384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223052832.7U Active CN218918761U (en) | 2022-11-16 | 2022-11-16 | Circuit breaker and tripping device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218918761U (en) |
-
2022
- 2022-11-16 CN CN202223052832.7U patent/CN218918761U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR20120060809A (en) | Circuit breaker | |
| JP5531894B2 (en) | Earth leakage breaker | |
| CN101976640A (en) | Low-voltage breaker tripper | |
| CN218918761U (en) | Circuit breaker and tripping device thereof | |
| FI97428C (en) | Switching member for an electrical switch and an electrical switch with this switching member | |
| EP2639812B1 (en) | Circuit protection device and trip unit for use with a circuit protection device | |
| KR200404959Y1 (en) | Trip device for electrical circuit breaker | |
| CN216928455U (en) | Release and circuit breaker | |
| US8859919B2 (en) | Methods and apparatus for assembling a circuit breaker | |
| JP5169721B2 (en) | Circuit breaker | |
| US5444423A (en) | Latch mechanism for a circuit breaker | |
| CN216928420U (en) | Circuit breaker and tripping device thereof | |
| JP4905112B2 (en) | Circuit breaker overcurrent trip device | |
| CN108010809B (en) | Plug-in miniature circuit breaker for improving connection strength of switch module and base | |
| CN219163310U (en) | Circuit breaker protection device | |
| CN108010808B (en) | Base for miniature circuit breaker | |
| JP2506486Y2 (en) | Overcurrent trip device for circuit breaker | |
| US4675640A (en) | Line terminal assembly for a circuit breaker | |
| CN217691031U (en) | Circuit breaker tripping device | |
| CN221176123U (en) | Tripping mechanism and circuit breaker | |
| CN216353957U (en) | Temperature controller with compact structure | |
| CN212648158U (en) | Temperature sensing type direct current switch protection device | |
| CN217182125U (en) | Low-cost moulded case circuit breaker | |
| CN110400729B (en) | Small-sized circuit breaker | |
| CN217788310U (en) | Thermomagnetic trip of circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |