CN220963207U

CN220963207U - Static contact assembly and circuit breaker

Info

Publication number: CN220963207U
Application number: CN202323062278.5U
Authority: CN
Inventors: 李文妹; 顾佳洁
Original assignee: Schneider Electric China Co Ltd
Current assignee: Schneider Electric China Co Ltd
Priority date: 2023-11-13
Filing date: 2023-11-13
Publication date: 2024-05-14
Anticipated expiration: 2033-11-13

Abstract

The embodiment of the disclosure provides a fixed contact assembly and a circuit breaker. The static contact assembly comprises a static contact, a fixed contact assembly and a movable contact assembly, wherein the static contact comprises a base, a connecting part and a bending part, the connecting part is arranged above the base and is spaced from the base, the bending part is connected between the connecting part and the base, and the bending direction of the bending part is away from the movable contact assembly; and an insulating case including a top insulating member partially covering the connection portion, a bent insulating member covering the bent portion, and a pair of spaced apart side insulating members, and each of the pair of side insulating members is connected with the top insulating member and the bent insulating member, respectively, to constitute an isolation chamber surrounding one end of the stationary contact adjacent to the moving contact assembly.

Description

Static contact assembly and circuit breaker

Technical Field

Embodiments of the present disclosure relate generally to the field of electrical equipment technology, and more particularly, to a stationary contact assembly and a circuit breaker.

Background

A circuit breaker refers to a switching device capable of closing, carrying and breaking a current in a normal loop condition and closing, carrying and breaking a current in an abnormal loop condition for a prescribed time.

The insulating case in the conventional circuit breaker only wraps the top region of the stationary contact assembly, and then the moving contact and the stationary contact are opened in the event of a short circuit test, and the generated arc is transferred between two metal pieces having a shorter electrical gap distance, thereby causing the ends of the moving contact assembly and the stationary contact assembly adjacent to each other to be ablated.

Disclosure of utility model

It is an object of the present disclosure to provide a stationary contact assembly and a circuit breaker to at least partially solve the above-mentioned problems.

In a first aspect of the present disclosure, there is provided a stationary contact assembly comprising a stationary contact including a base, a connecting portion above and spaced apart from the base, and a bent portion connected between the connecting portion and the base, wherein a bending direction of the bent portion is directed away from a moving contact assembly; and an insulating housing including a top insulating member partially covering the connection portion, a bent insulating member covering the bent portion, and a pair of spaced apart side insulating members, and each of the pair of side insulating members is connected with the top insulating member and the bent insulating member, respectively, to constitute an isolation chamber surrounding one end of the stationary contact adjacent to the movable contact assembly _.

According to an embodiment of the present disclosure, the top insulator partially covers the connection portion, the bent insulator covers the bent portion, and each of the side insulators is connected with the top insulator and the bent insulator, respectively, to constitute an isolation chamber surrounding one end of the stationary contact adjacent to the moving contact assembly. Therefore, one end of the fixed contact, which is adjacent to the movable contact assembly, is wrapped by the isolation chamber, so that the bent part and the outer side surface of the fixed contact, which are adjacent to one end of the movable contact assembly, are also wrapped and protected by the isolation chamber, and further, one end, which is adjacent to each other, of the movable contact assembly and the fixed contact assembly is prevented from being ablated.

In some embodiments, the bend includes a first bend adjacent the connection, a second bend adjacent the base, and an intermediate portion between the first bend and the second bend, and the bend insulator includes a first bend insulator covering the first bend, a second bend insulator covering the second bend, and an intermediate insulator covering the intermediate portion.

In some embodiments, each of the side insulators of the pair of side insulators is connected with the top insulator, the first bent insulator, the second bent insulator, and the middle insulator, respectively, to form the isolation chamber.

In some embodiments, the insulating shell further comprises a first fillet between the side insulator and the top insulator, a second fillet between the side insulator and the first folded insulator, a third fillet between the side insulator and the second folded insulator, and a fourth fillet between the side insulator and the middle insulator.

In some embodiments, the bending direction of the first bending insulator is away from the moving contact assembly and directed toward the base, and the bending direction of the second bending insulator is away from the moving contact assembly and directed toward the connecting portion.

In some embodiments, a stationary contact is provided on a side of the connection portion facing away from the base portion, and a mounting groove partially surrounding the stationary contact is provided on an end of the top insulator facing away from the moving contact assembly.

In some embodiments, a side of the end of the top insulator surrounding the stationary contact facing away from the base is closer to the base than a side of the stationary contact facing away from the base.

In some embodiments, the pair of side insulators are provided with protrusions on surfaces facing each other, the protrusions abutting outer side surfaces of the stationary contact.

In some embodiments, a side of the side insulator facing away from the top insulator is provided with a first end face spaced apart from a top face of the base and a second end face connected to the first end face spaced apart from an end face of the base adjacent to the moving contact assembly.

In a second aspect of the present disclosure, there is provided a circuit breaker including: any one of the stationary contact assemblies according to the first aspect of the present disclosure; and a moving contact assembly.

It should be understood that what is described in this section is not intended to limit the key features or essential features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description.

Drawings

The above and other features, advantages and aspects of embodiments of the present disclosure will become more apparent by reference to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, wherein like or similar reference numerals denote like or similar elements, in which:

fig. 1 illustrates a schematic arrangement of a stationary contact assembly relative to a moving contact assembly according to some embodiments of the present disclosure;

Fig. 2 illustrates a structural schematic of a stationary contact assembly according to some embodiments of the present disclosure;

fig. 3 illustrates an exploded view of a stationary contact assembly according to some embodiments of the present disclosure;

Fig. 4 illustrates a schematic structural view of an insulating shell along a certain viewing angle according to some embodiments of the present disclosure;

Fig. 5 illustrates a schematic structural view of an insulating shell along another view angle according to some embodiments of the present disclosure.

Reference numerals illustrate:

100 is a static contact assembly, 101 is an isolation chamber; 200 is a moving contact assembly;

1 is a fixed contact, 11 is a connecting part, 111 is a fixed contact, 12 is a base, 13 is a bending part, 131 is a first bending part, 132 is a second bending part, and 133 is a middle part;

2 is an insulating shell, 21 is a top insulating piece, 211 is a mounting groove, 22 is a bending insulating piece, 221 is a first bending insulating piece, 222 is a second bending insulating piece, 223 is a middle insulating piece, 23 is a side insulating piece, 231 is a protruding piece, 232 is a first end face, 233 is a second end face, 24 is a first round angle, 25 is a second round angle, 26 is a third round angle, and 27 is a fourth round angle;

And 3 is a magnetic increasing sheet.

Detailed Description

Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present disclosure are illustrated in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The term "comprising" and variations thereof as used herein means open ended, i.e., "including but not limited to. The term "or" means "and/or" unless specifically stated otherwise. The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment. The term "another embodiment" means "at least one additional embodiment". The terms "first," "second," and the like, may refer to different or the same object.

As described hereinabove, the insulating case in the conventional circuit breaker wraps only the top region of the stationary contact assembly, and then the moving contact is opened in the event of a short circuit test, the arc is transferred between the two metal pieces having a shorter electrical gap distance, thereby causing the moving contact assembly and the end of the stationary contact assembly adjacent to each other to be ablated, in particular, causing the root of the moving contact assembly, the root of the stationary contact assembly, and the moving contact spring to be ablated. Embodiments of the present disclosure provide a stationary contact assembly 100 and a circuit breaker to at least partially solve the above-described problems. Hereinafter, the principles of the present disclosure will be described with reference to fig. 1 to 5.

Fig. 1 illustrates a schematic arrangement of a stationary contact assembly 100 relative to a moving contact assembly 200 according to some embodiments of the present disclosure. As shown in fig. 1, the moving contact assembly 200 is located at one end of the stationary contact assembly 100. Under the condition that the breaker is switched on, the moving contact is connected with the fixed contact 1; and under the condition of breaking the breaker, the moving contact is disconnected with the fixed contact 1.

Fig. 2 illustrates a schematic structural view of a stationary contact assembly 100 according to some embodiments of the present disclosure. Fig. 3 illustrates an exploded view of the stationary contact assembly 100 according to some embodiments of the present disclosure. As shown in fig. 2 to 3, the stationary contact assembly 100 described herein generally includes a stationary contact 1, an insulating housing 2, and a magnetic reinforcing sheet 3, wherein the insulating housing 2 wraps one end of the stationary contact 1 adjacent to the movable contact assembly 200.

With continued reference to fig. 2-3, in some embodiments, the stationary contact 1 may include a base 12, a connecting portion 11, and a bent portion 13, where the base 12 may be disposed straight and the connecting portion 11 may be disposed obliquely. The connecting portion 11 may be disposed above the base portion 12 and spaced apart from the base portion 12, while the magnetism increasing sheet 3 is located in a space where the connecting portion 11 and the base portion 12 are spaced apart. The bending portion 13 is connected between the connection portion 11 and the base portion 12 for connecting the base portion 12 and the connection portion 11, respectively, and a bending direction of the bending portion 13 may deviate from the moving contact assembly 200.

Accordingly, the insulating case 2 may include a top insulating member 21, a bent insulating member 22, and a pair of side insulating members 23. The top insulator 21 partially covers the connection portion 11, the bent insulator 22 covers the bent portion 13, and the pair of side insulators 23 are spaced apart and may wrap the side surfaces of the stationary contact 1. Each side insulator 23 is connected to the top insulator 21 and the bent insulator 22, respectively, thereby constituting an isolation chamber 101 that encloses one end of the movable contact assembly 200 of the stationary contact 1.

Obviously, with the above configuration, the end of the fixed contact 1 adjacent to the moving contact assembly 200 is wrapped by the isolation chamber 101, so that the bent portion 13 and the outer side surface of the fixed contact 1 adjacent to the end of the moving contact assembly 200 are also wrapped and protected by the isolation chamber 101, thereby preventing the ends of the moving contact assembly 200 and the fixed contact assembly 100 adjacent to each other from being ablated. More specifically, the root of the moving contact assembly 200, the root of the stationary contact assembly 100, and the moving contact spring are prevented from being ablated. In addition, the isolation chamber 101 can also wrap the magnetic increasing sheet 3, and the volume of the magnetic increasing sheet 3 is prevented from being reduced without changing the magnetic increasing sheet 3, so that the magnetic blowing effect of the static contact assembly 100 is good.

Fig. 4 illustrates a schematic structural view of an insulating housing 2 along a certain viewing angle according to some embodiments of the present disclosure. Fig. 5 illustrates a schematic structural view of the insulating housing 2 along another view angle according to some embodiments of the present disclosure. As shown in fig. 4 to 5, the bending part 13 may include a first bending part 131, a second bending part 132, and an intermediate part 133, wherein the first bending part 131 is adjacent to the connection part and connected with the connection part 11, the second bending part 132 is adjacent to the base part 12 and connected with the base part 12, and the intermediate part 133 is located between the first bending part 131 and the second bending part 132. Accordingly, the bent insulator 22 may include a first bent insulator 221, a second bent insulator 222, and an intermediate insulator 223. The first bent insulator 221 covers the first bent portion 131, the second bent insulator 222 covers the second bent portion 132, and the intermediate insulator 223 covers the intermediate portion 133.

With continued reference to fig. 3-4, further, each side insulator 23 may be connected to the top insulator 21, the first bent insulator 221, the second bent insulator 222, and the middle insulator 223, respectively, and thereby form the isolation chamber 101. Obviously, the end of the fixed contact 1 adjacent to the movable contact assembly 200 is wrapped by the isolation chamber 101, so that the bent portion 13 and the outer side surface of the fixed contact 1 adjacent to the end of the movable contact assembly 200 are also wrapped and protected by the isolation chamber 101, and further the end of the movable contact assembly 200 and the end of the fixed contact assembly 100 adjacent to each other are prevented from being ablated.

With continued reference to fig. 1-4, in some embodiments, the bending direction of the first bent insulator 221 may be away from the moving contact assembly 200, and the bending direction of the first bent insulator 221 is directed toward the base 12. The bending direction of the second bending insulator 222 may deviate from the moving contact assembly 200, and the bending direction of the second bending insulator 222 is directed toward the connection portion 11. With the above configuration, the first and second bent insulators 221 and 222 can be abutted against the fixed contact 1, and return to fig. 1, so that the insulating housing 2 sleeved on the outer side surface of the fixed contact 1 is not pushed up by friction force in the case that the whole fixed contact assembly 100 is mounted on the base of the circuit breaker from top to bottom, thereby preventing the insulating housing 2 from being separated from the fixed contact 1.

With continued reference to fig. 5, in some embodiments, the paired side insulating members 23 are provided with protruding members 231 on the faces facing each other, and the protruding members 231 abut against the outer side faces of the stationary contact 1. Similarly, with the above configuration, in the case where the whole of the stationary contact assembly 100 is mounted on the base of the circuit breaker from top to bottom, the insulating housing 2 fitted on the outer side surface of the stationary contact 1 is not pushed upward by friction, thereby preventing the insulating housing 2 from being separated from the stationary contact 1.

With continued reference to fig. 3-4, in some embodiments, a side of the side insulator 23 facing away from the top insulator 21 is provided with a first end face 232 and a second end face 233 connected to the first end face 232. The first end surface 232 may be spaced apart from the top surface of the base 12, while the second end surface 233 may be spaced apart from the end surface of the base 12 adjacent the moving contact assembly 200. With the above configuration, it is possible to ensure that the volume of the insulating case 2 can be reduced while the insulating case 2 has a good insulating effect, thereby reducing the production cost; in addition, since the top insulator 21 is in contact with the connection portion 11, spacing the first end face 232 from the top face of the base 12 can avoid over-constraint.

With continued reference to fig. 3-4, in some embodiments, a first fillet 24 is provided between the side insulator 23 and the top insulator 21. A second rounded corner 25 is provided between the side insulator 23 and the first folded insulator 221. A third rounded corner 26 is provided between the side insulator 23 and the second bent insulator 222. A fourth rounded corner 27 is provided between the side insulator 23 and the middle insulator 223. It can be seen that the provision of rounded corners between the side insulator 23 and the top insulator 21 and the bent insulator 22, respectively, facilitates the alleviation of stress concentrations, thereby effectively avoiding breakage of the junction of the side insulator 23 and the top insulator 21 and breakage of the junction of the side insulator 23 and the bent insulator 22.

With continued reference to fig. 2-4, in particular, the top insulator 21 partially covers the connection 11. The side of the connection facing away from the base 12 is provided with a stationary contact 111, which stationary contact 111 is mainly connected with the moving contact. The end of the top insulator 21 facing away from the moving contact assembly 200 may be provided with a mounting groove 211, and the mounting groove 211 may partially surround the stationary contact 111 and surround a portion of the stationary contact 111 adjacent to the end of the moving contact assembly 200.

With continued reference to fig. 2, in some embodiments, the side of the end of the top insulator 21 surrounding the stationary contact 111 facing away from the base 12 is closer to the base 12 than the side of the stationary contact 111 facing away from the base 12. Thereby, the insulating housing 2 does not interfere with the connection of the moving contact and the stationary contact 111.

Embodiments of the present disclosure also provide a circuit breaker including any of the stationary contact assemblies 100 described above; and a moving contact assembly 200.

The stationary contact assembly 100 according to the embodiment of the present disclosure may be applied to various circuit breakers to prevent one end of the moving contact assembly 200 and the stationary contact assembly 100 adjacent to each other from being ablated. It should be appreciated that the stationary contact assembly 100 according to embodiments of the present disclosure may also be applied to other electrical components, as well, embodiments of the present disclosure are not limited in this regard.

The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvement in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A stationary contact assembly (100), characterized in that the stationary contact assembly (100) comprises:

The static contact (1) comprises a base (12), a connecting part (11) above the base (12) and spaced from the base (12) and a bending part (13) connected between the connecting part (11) and the base (12), wherein the bending direction of the bending part (13) is away from a moving contact assembly (200); and

An insulating shell (2) comprising a top insulating member (21) partially covering the connecting portion (11), a bent insulating member (22) covering the bent portion (13), and a pair of spaced apart side insulating members (23), and each side insulating member (23) of the pair of side insulating members (23) is connected with the top insulating member (21) and the bent insulating member (22), respectively, to constitute an isolation chamber (101) surrounding one end of the stationary contact (1) adjacent to the movable contact assembly (200).

2. The stationary contact assembly (100) of claim 1, wherein the bent portion (13) includes a first bent portion (131) adjacent the connection portion (11), a second bent portion (132) adjacent the base portion (12), and an intermediate portion (133) between the first bent portion (131) and the second bent portion (132), and the bent insulator (22) includes a first bent insulator (221) covering the first bent portion (131), a second bent insulator (222) covering the second bent portion (132), and an intermediate insulator (223) covering the intermediate portion (133).

3. The stationary contact assembly (100) of claim 2, wherein each of the side insulators (23) of the pair of side insulators (23) is connected with the top insulator (21), the first folded insulator (221), the second folded insulator (222), and the intermediate insulator (223), respectively, to form the isolation chamber (101).

4. A stationary contact assembly (100) according to claim 3, characterized in that the insulating shell (2) further comprises a first rounded corner (24) between the side insulating member (23) and the top insulating member (21), a second rounded corner (25) between the side insulating member (23) and the first bent insulating member (221), a third rounded corner (26) between the side insulating member (23) and the second bent insulating member (222), and a fourth rounded corner (27) between the side insulating member (23) and the intermediate insulating member (223).

5. The stationary contact assembly (100) according to claim 2, characterized in that the bending direction of the first bent insulator (221) is directed away from the moving contact assembly (200) and towards the base (12), and the bending direction of the second bent insulator (222) is directed away from the moving contact assembly (200) and towards the connecting portion (11).

6. The stationary contact assembly (100) according to claim 2, characterized in that a stationary contact (111) is provided on a side of the connection part (11) facing away from the base part (12), and that an end of the top insulator (21) facing away from the moving contact assembly (200) is provided with a mounting groove (211) partly surrounding the stationary contact (111).

7. The stationary contact assembly (100) according to claim 6, characterized in that the side of the top insulation (21) surrounding the end of the stationary contact (111) facing away from the base (12) is closer to the base (12) than the side of the stationary contact (111) facing away from the base (12).

8. The stationary contact assembly (100) according to claim 2, characterized in that the pair of side insulators (23) are provided with protrusions (231) on their faces facing each other, the protrusions (231) abutting against the outer side faces of the stationary contact (1).

9. The stationary contact assembly (100) according to claim 2, characterized in that a side of the side insulator (23) facing away from the top insulator (21) is provided with a first end face (232) and a second end face (233) connected to the first end face (232), wherein the first end face (232) is spaced apart from the top face of the base (12), and the second end face (233) is spaced apart from an end face of the base (12) adjacent to the moving contact assembly (200).

10. A circuit breaker, the circuit breaker comprising:

the stationary contact assembly (100) according to any one of claims 1 to 9; and

A moving contact assembly (200).