CN220963190U - Circuit breaker - Google Patents

Abstract

The embodiment of the disclosure provides a circuit breaker, which comprises a shell, wherein one end of the shell is provided with at least two spaced mounting grooves, and each mounting groove of the at least two mounting grooves is respectively provided with a wiring terminal; and a wire connection member including a support column disposed in each of the mounting grooves and a wire connection nut embedded in the support column, the wire connection nut being connected with the corresponding wire connection terminal, and an outer surface of the wire connection nut being spaced apart from the housing, an outer surface of the wire connection terminal being spaced apart from the support column.

Description

Circuit breaker

Technical Field

Embodiments of the present disclosure relate generally to the field of electrical equipment technology, and more particularly, to a circuit breaker with a built-in wiring member.

Background

A circuit breaker refers to a switching device capable of closing, carrying, and breaking a current under normal loop conditions and capable of closing, carrying, and breaking a current under abnormal loop conditions for a prescribed time. The connection terminals of the circuit breaker are mainly connected with cables or copper bars for power supply access. The length of the conductive path between adjacent terminals needs to meet minimum safety requirements to avoid conduction of adjacent terminals, thereby ensuring inter-electrode dielectric withstand capability of the circuit breaker under conditions of high operating voltage and severe contamination.

To ensure inter-electrode dielectric withstand capability of the circuit breaker, on one hand, the conventional circuit breaker increases the size of the circuit breaker by increasing the length of the base between adjacent terminals, although the length of the conductive path between adjacent terminals can be increased; on the other hand, the conventional circuit breaker is additionally provided with an insulating cover at the outer side of the connection terminals, and although the length of the conductive path between the adjacent connection terminals can also be increased, the heat dissipation of the circuit breaker is affected.

Disclosure of utility model

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

In one aspect of the present disclosure, there is provided a circuit breaker including a housing having one end provided with at least two spaced apart mounting slots, each of the at least two mounting slots being respectively provided with a connection terminal; and a wire connection member including a support column disposed in each of the mounting grooves and a wire connection nut embedded in the support column, the wire connection nut being connected with the corresponding wire connection terminal, and an outer surface of the wire connection nut being spaced apart from the housing, an outer surface of the wire connection terminal being spaced apart from the support column.

According to embodiments of the present disclosure, the outer surface of the terminal nut is spaced apart from the housing and the outer surface of the terminal post is spaced apart from the support post, thereby avoiding conduction between the terminal nut and the housing due to air breakdown and avoiding conduction between the terminal post and the support post due to air breakdown. Therefore, the conductive path can flow through the outer surfaces of the wiring terminals, the wiring nuts, the supporting columns and the outer surface of the shell, and the length of the conductive path between the adjacent wiring terminals is increased, so that the conduction of the adjacent wiring terminals is avoided, and the inter-electrode dielectric tolerance of the circuit breaker under the conditions of high working voltage and serious pollution is ensured.

Accordingly, the circuit breaker according to the embodiment of the present disclosure can solve the problem of conduction of the adjacent connection terminals. In addition, on the one hand, since the whole of the wiring member is disposed inside the installation groove, the size of the circuit breaker is not increased; on the other hand, the terminal is connected with the terminal nut, and the outer surface of the terminal nut is spaced apart from the housing, and the outer surface of the terminal is spaced apart from the support column, so that heat dissipation of the circuit breaker is not affected.

In some embodiments, the distance between the outer surface of the terminal nut and the housing is greater than 0.33mm and the distance between the outer surface of the terminal post and the support post is greater than 0.33mm.

In some embodiments, the distance between the outer surface of the terminal nut and the housing is greater than 1.5mm and the distance between the outer surface of the terminal post and the support post is greater than 1.5mm.

In some embodiments, a clamping groove is formed in an outer side surface of one end, far away from the wiring terminal, of the support column, a clamping piece is arranged on an inner wall surface, adjacent to the adjacent mounting groove, of the mounting groove, and the clamping piece is matched with the clamping groove.

In some embodiments, an end of the connection terminal remote from the clamping member is further remote from the clamping member than an end of the support post remote from the clamping member.

In some embodiments, the support post includes a first portion and a second portion adjacent the terminal, the first portion being spaced apart from the second portion and forming a mounting chamber along a direction in which the mounting slot points toward an adjacent other of the mounting slots, the terminal nut being disposed within the mounting chamber, a portion of the terminal being located within the mounting chamber, another portion of the terminal passing out of the mounting chamber.

In some embodiments, the length of the end of the first portion adjacent to the bottom of the mounting groove is less than the length of the end of the first portion remote from the bottom of the mounting groove, and the length of the end of the second portion adjacent to the bottom of the mounting groove is less than the length of the end of the second portion remote from the bottom of the mounting groove, along the direction in which the mounting groove points to the adjacent other of the mounting grooves.

In some embodiments, at least one creepage groove is respectively arranged on the surfaces of the first part and the second part facing each other, and one end of the connection nut far away from the clamping piece is closer to the clamping piece relative to the at least one creepage groove.

In some embodiments, the at least one creepage slot includes a pair of creepage slots, one of the creepage slots of the pair being closer to the clip than the other creepage slot.

In some embodiments, the binding post is provided with a mounting hole corresponding to the nut hole of the binding nut, and the mounting hole and the nut hole are internally provided with a mounting stud so as to connect the binding post with the binding nut.

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 structural diagram of a circuit breaker according to some embodiments of the present disclosure;

FIG. 2 illustrates a schematic diagram of a wire connector and wire terminals according to some embodiments of the present disclosure;

FIG. 3 shows a schematic structural view of a support column according to the connector shown in FIG. 2;

FIG. 4 illustrates a schematic diagram of a wire connector and wire terminals according to further embodiments of the present disclosure;

fig. 5 shows a schematic structural view of a support column according to the connector shown in fig. 4.

Reference numerals illustrate:

100 is a circuit breaker, 101 is a mounting chamber;

1 is a shell, 11 is a mounting groove, 111 is a groove bottom, and 12 is a clamping piece;

2 is a wiring terminal, and 21 is a mounting hole;

3 is a wiring piece, 31 is a supporting column, 311 is a clamping groove, 312 is a first part, 313 is a second part, 314 is a climbing groove, and 32 is a wiring nut.

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, in order to secure inter-electrode dielectric withstand capability of the circuit breaker, conventional circuit breakers generally require an increase in the length of the conductive path between adjacent connection terminals, but cause problems in that the size of the circuit breaker increases and heat dissipation of the circuit breaker is affected. Embodiments of the present disclosure provide a circuit breaker 100 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 structural diagram of a circuit breaker 100 according to some embodiments of the present disclosure. Fig. 2 illustrates a schematic structural view of a wire connector 3 and a wire connection terminal 2 according to some embodiments of the present disclosure. Fig. 3 shows a schematic structural view of the support column 31 of the connector 3 according to fig. 2. Fig. 4 shows a schematic structural view of the wire connector 3 and the wire connection terminal 2 according to further embodiments of the present disclosure. Fig. 5 shows a schematic structural view of the support column 31 of the connector 3 according to fig. 4. As shown in fig. 1 to 5, the circuit breaker 100 described herein generally includes a housing 1, a connection terminal 2, and a connection member 3. With continued reference to fig. 1, housing 1 serves as a mounting carrier for mounting terminal 2 and wire connector 3. Specifically, one end of the housing 1 is provided with at least two mounting grooves 11 spaced apart, and each mounting groove 11 of the at least two mounting grooves 11 is provided with the connection terminal 2 and the connection member 3, respectively.

With continued reference to fig. 1-5, in some embodiments, the wire connector 3 is connected to the wire terminal 2. The wire connector 3 includes a support post 31 and a wire connector nut 32. The support column 31 is provided inside the mounting groove 11. The connection nut 32 is embedded in the support column 31, and one end of the connection nut 32 is connected with the connection terminal 2, so that the connection nut 32 is in conduction with the connection terminal 2. The outer surface of the terminal nut 32 is spaced apart from the housing 1 and the outer surface of the terminal 2 is spaced apart from the support post 31.

With continued reference to fig. 1, 2 and 4, according to embodiments of the present disclosure, the outer surface of the terminal nut 32 is spaced apart from the housing 1 and the outer surface of the terminal 2 is spaced apart from the support post 31, thereby avoiding conduction between the terminal nut 32 and the housing 1 due to air breakdown and avoiding conduction between the terminal 2 and the support post 31 due to air breakdown. The conductive path thus flows through the terminal 2, the terminal nut 32, the outer surface of the support column 31 and the outer surface of the case 1, increasing the length of the conductive path between adjacent terminals 2, thereby avoiding conduction of adjacent terminals 2 and ensuring inter-electrode dielectric withstand capability of the circuit breaker 100 under high operating voltage and severe pollution.

In summary, the circuit breaker 100 according to the embodiment of the present disclosure can solve the problem of conduction of the adjacent connection terminals 2. In addition, on the one hand, since the entirety of the wiring member 3 is disposed inside the installation groove 11, the size of the circuit breaker 100 is not increased; on the other hand, the terminal 2 is connected with the terminal nut 32, and the outer surface of the terminal nut 32 is spaced apart from the housing 1, and the outer surface of the terminal 2 is spaced apart from the support column 31, so that heat dissipation of the circuit breaker 100 is not affected.

It should be noted that, in the case of different standards, the safety distance between adjacent terminals 2 of the circuit breaker 100 is different, so that the distance between the outer surface of the terminal nut 32 and the housing 1 is different, and the distance between the outer surface of the terminal 2 and the support column 31 is different. For example, in some embodiments, for a circuit breaker 100 under the DC1500V, UL489 standard, the distance between the outer surface of the terminal nut 32 and the housing 1 should be greater than 0.33mm, and the distance between the outer surface of the terminal 2 and the support post 31 should be greater than 0.33mm. In other embodiments, for the circuit breaker 100 under IEC60947 standard, the distance between the outer surface of the terminal nut 32 and the housing 1 should be greater than 1.5mm, and the distance between the outer surface of the terminal 2 and the support post 31 should be greater than 1.5mm.

It should be noted that the numbers, values, numbers, etc. mentioned above and as may be referred to elsewhere in the disclosure are exemplary and are not intended to limit the scope of the disclosure in any way. Any other suitable numbers, values, numbers are possible. For example, the distance between the outer surface of the terminal nut 32 and the housing 1 and the distance between the outer surface of the terminal 2 and the support column 31 may be increased or decreased according to the standards of the circuit breaker 100.

With continued reference to fig. 3 and 5, in some embodiments, an outer side surface of an end of the support column 31 remote from the terminal 2 is provided with a clamping groove 311. The inner wall surface of the mounting groove 11 adjacent to the adjacent mounting groove 11 is provided with a clip 12. The clamping piece 12 is matched with the clamping groove 311. With the above configuration, after the clamping member 12 is aligned with the clamping groove 311, the wire connector 3 is pushed into the mounting groove 11, so that the wire connector 3 is clamped with the housing 1.

With continued reference to fig. 2-5, a mounting chamber 101 is provided within the support column 31, and the terminal nut 32 and terminal 2 are located within the mounting chamber 101, respectively. Specifically, an end of the support column 31 adjacent to the connection terminal 2 includes a first portion 312 and a second portion 313. The first portion 312 is spaced apart from the second portion 313 in a direction in which the mounting groove 11 is directed toward the adjacent other mounting groove 11, and the mounting chamber 101 is formed between the first portion 312 and the second portion 313. The terminal nut 32 is at least partially disposed within the mounting chamber 101. The terminal 2 extends in a direction away from the clip 12, and a portion of the terminal 2 is located within the mounting chamber 101, and another portion of the terminal 2 passes out of the mounting chamber 101.

Obviously, referring to fig. 2 and 4, since the end surface of the connection terminal 2 away from the clamping member 12 needs to be connected to a cable or a copper bar for the connection of a circuit, the end of the connection terminal 2 away from the clamping member 12 is further away from the clamping member 12 than the end of the support column 31 away from the clamping member 12 along the direction in which the mounting groove 11 points to the adjacent other mounting groove 11. With the above configuration, in the case where the cable or the copper bar is mounted at the end of the connection terminal 2 remote from the clip 12, since the end face of the connection terminal 2 is higher than the end faces of the first portion 312 and the second portion 313, the first portion 312 and the second portion 313 do not interfere with the mounting of the cable or the copper bar.

With continued reference to fig. 2 to 4, the terminal 2 is provided with a mounting hole 21. The mounting hole 21 is aligned with the nut hole of the terminal nut 32. The cable or the copper bar is firstly placed at one end of the wiring terminal 2 far away from the clamping piece 12, then a mounting stud (not shown in the figure) sequentially passes through the mounting hole 21 and the nut hole and is meshed in the nut hole, the mounting stud presses the cable or the copper bar at one end of the wiring terminal 2 far away from the clamping piece 12, and finally the cable or the copper bar, the wiring terminal 2 and the wiring nut 32 are connected and conducted.

With continued reference to fig. 3 and 5, in some embodiments, the length of the end of the first portion 312 adjacent the groove bottom 111 of the mounting groove 11 is less than the length of the end of the first portion 312 remote from the groove bottom 111 of the mounting groove 11 in a direction in which the mounting groove 11 points toward an adjacent other mounting groove 11. The length of the end of the second portion 313 adjacent to the groove bottom 111 of the mounting groove 11 is smaller than the length of the end of the second portion 313 remote from the groove bottom 111 of the mounting groove 11. That is, length L2 is less than length L1. With the above configuration, in the case where the current flows toward the housing 1, the current passes through the end of the second portion 313 away from the groove bottom 111 of the mounting groove 11, and the length L1 is large, so that the length of the current path between the current from the support column 31 to the housing 1 is increased, further avoiding conduction of the adjacent connection terminals 2.

Referring to fig. 2-3, in some embodiments, no creepage grooves 314 are provided on the faces of the first and second portions 312, 313 that face each other.

Referring to fig. 4-5, in other embodiments, at least one creeper trough 314 is provided on each of the facing surfaces of the first and second portions 312, 313. The end of the terminal nut 32 remote from the clamping member 12 is closer to the clamping member 12 than the at least one creepage groove 314. With the above-described configuration, in the case where current flows upward from the terminal nut 32 and toward the housing 1, the current sequentially passes through the at least one creepage groove 314, thereby increasing the length of the current path between the current from the support column 31 to the housing 1, further avoiding conduction of the adjacent terminal 2.

Referring to fig. 5, in some embodiments, one creeper trough 314 is provided on each of the facing sides of the first and second sections 312, 313. In other embodiments, pairs of creeper grooves 314 are provided on the faces of the first and second sections 312, 313 that face each other, respectively. One creepage slot 314 of the pair of creepage slots 314 is closer to the joint 12 than the other creepage slot 314. With the above arrangement, in the case where the current flows upward from the junction nut 32 and toward the housing 1, the current sequentially passes through the paired creepage grooves 314, thereby increasing the length of the current path between the current from the support column 31 to the housing 1, further avoiding conduction of the adjacent junction terminals 2.

The creepage slots 314 according to embodiments of the present disclosure may be slots of various shapes that are currently known, as embodiments of the present disclosure are not limited in this regard. For example, in some embodiments, the creepage trough 314 includes rectangular troughs. In other embodiments, the creepage trough 314 includes a U-shaped trough.

The wire connector 3 according to the embodiment of the present disclosure may be applied to various circuit breakers 100 to enable an increase in the length of the conductive path between adjacent wire connection terminals 2 without increasing the size of the circuit breaker 100 and affecting the heat dissipation of the circuit breaker 100. It should be understood that the wire connector 3 according to the embodiment of the present disclosure may also be applied to other electrical devices, to which the embodiment of the present disclosure is not limited.

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 (10)

1. A circuit breaker (100), characterized in that the circuit breaker (100) comprises:

the connecting device comprises a shell (1), wherein at least two spaced mounting grooves (11) are formed in one end of the shell (1), and a connecting terminal (2) is respectively arranged in each mounting groove (11) of the at least two mounting grooves (11); and

The wiring piece (3) comprises a supporting column (31) arranged in each mounting groove (11) and a wiring nut (32) embedded in the supporting column (31), wherein the wiring nut (32) is connected with the corresponding wiring terminal (2), the outer surface of the wiring nut (32) is spaced from the shell (1), and the outer surface of the wiring terminal (2) is spaced from the supporting column (31).

2. The circuit breaker (100) of claim 1 wherein the distance between the outer surface of the terminal nut (32) and the housing (1) is greater than 0.33mm and the distance between the outer surface of the terminal (2) and the support post (31) is greater than 0.33mm.

3. The circuit breaker (100) of claim 1 wherein the distance between the outer surface of the terminal nut (32) and the housing (1) is greater than 1.5mm and the distance between the outer surface of the terminal (2) and the support post (31) is greater than 1.5mm.

4. The circuit breaker (100) of claim 1, wherein an outer side surface of one end of the support column (31) far away from the wiring terminal (2) is provided with a clamping groove (311), a clamping piece (12) is provided on an inner wall surface of the mounting groove (11) adjacent to the adjacent mounting groove (11), and the clamping piece (12) is adapted to the clamping groove (311).

5. The circuit breaker (100) of claim 4 wherein an end of the terminal (2) remote from the clamping member (12) is further remote from the clamping member (12) than an end of the support post (31) remote from the clamping member (12).

6. The circuit breaker (100) of claim 5 wherein said support post (31) includes a first portion (312) and a second portion (313) adjacent said terminal (2), said first portion (312) being spaced from said second portion (313) and defining a mounting chamber (101) along a direction in which said mounting slot (11) is directed toward an adjacent other said mounting slot (11), said terminal nut (32) being disposed within said mounting chamber (101), a portion of said terminal (2) being disposed within said mounting chamber (101), and another portion of said terminal (2) passing out of said mounting chamber (101).

7. The circuit breaker (100) of claim 6 wherein the length of the end of the first portion (312) adjacent the bottom (111) of the mounting slot (11) is less than the length of the end of the first portion (312) remote from the bottom (111) of the mounting slot (11), and the length of the end of the second portion (313) adjacent the bottom (111) of the mounting slot (11) is less than the length of the end of the second portion (313) remote from the bottom (111) of the mounting slot (11).

8. The circuit breaker (100) of claim 6, wherein the first portion (312) and the second portion (313) are each provided with at least one creepage groove (314) on a face thereof facing each other, an end of the terminal nut (32) remote from the clamping member (12) being closer to the clamping member (12) than the at least one creepage groove (314).

9. The circuit breaker (100) of claim 8 wherein said at least one creepage slot (314) includes a pair of creepage slots (314), one creepage slot (314) of said pair of creepage slots (314) being closer to said clamping member (12) than the other creepage slot (314).

10. The circuit breaker (100) of claim 1 wherein said terminal (2) is provided with a mounting hole (21) corresponding to a nut hole of said terminal nut (32), said mounting hole (21) and said nut hole being internally provided with a mounting stud to connect said terminal (2) with said terminal nut (32).