CN217768789U - Neutral terminal subassembly and circuit breaker block terminal - Google Patents

Abstract

The utility model discloses a neutral terminal subassembly and circuit breaker block terminal, this neutral terminal subassembly includes insulating support piece, first coupling nut, first generating line, first connecting piece, the second generating line, second connecting piece and first binding post, insulating support piece includes the mounting panel and sets up the installation cavity on the mounting panel top, first coupling nut is arranged in the installation cavity and is spacing at the spacing downthehole of first nut, first generating line sets up at last installation cavity, first connecting piece can be dismantled first generating line and mounting panel by supreme down and be connected, the parallel overlap joint of second generating line is in the top of first generating line and is located the tip of first generating line, threaded connection is in first threaded hole of first coupling nut behind the second connecting piece passes the first through-hole on second through-hole on the first generating line and the second generating line from top to bottom, first binding post is connected with the second generating line. The neutral terminal assembly is simple in structure, low in manufacturing cost, simple in disassembly, assembly and maintenance operation and high in efficiency.

Description

Neutral terminal subassembly and circuit breaker block terminal

Technical Field

The utility model relates to a circuit breaker block terminal technical field especially relates to a neutral terminal subassembly and circuit breaker block terminal.

Background

The neutral terminal subassembly is the important component part in the circuit breaker block terminal, and each part of the neutral terminal subassembly of current circuit breaker block terminal not only structure is complicated, need open more mould and just can realize the required function of standard part for the processing cost of neutral terminal subassembly is higher, and the maintenance of each part is carried out if needing to dismantle to the well assembled neutral terminal subassembly, needs dismantle one by one, and complex operation, the efficiency of maintaining is lower.

Therefore, it is an urgent technical problem to provide a neutral terminal assembly that is low in cost and convenient to assemble, disassemble, maintain and operate.

SUMMERY OF THE UTILITY MODEL

A first object of the present invention is to provide a neutral terminal assembly, which is not only low in cost, but also easy to assemble and disassemble and maintain, and high in efficiency.

To achieve the purpose, the utility model adopts the following technical proposal:

a neutral terminal assembly, comprising: the insulating support piece comprises a mounting plate and an upper mounting cavity arranged above the mounting plate, and a first nut limiting hole is formed in the mounting plate; the first connecting nut is arranged in the upper mounting cavity and limited in the first nut limiting hole; the first bus is arranged in the upper mounting cavity, and the first connecting piece detachably connects the first bus with the mounting plate from bottom to top; the second bus is parallelly overlapped above the first bus and positioned at the end part of the first bus, a first through hole is formed in the first bus opposite to the position limiting hole of the first nut, a second through hole is formed in the second bus opposite to the position limiting hole of the first nut, and the second connecting piece penetrates through the second through hole and the first through hole from top to bottom and then is in threaded connection with the first threaded hole of the first connecting nut; the first wiring terminal is connected with the second bus, and the first wiring terminal is used for an external cable.

Preferably, the neutral terminal assembly further comprises a third bus, a second wiring terminal, a third connecting piece and a fourth connecting piece, the third bus is perpendicular to the first bus, one end of the third bus is connected with the middle of the first bus in a detachable mode through the third connecting piece, the second wiring terminal is located above the third bus, and the fourth connecting piece penetrates through the second wiring terminal and the other end of the third bus from top to bottom and is connected with the insulating supporting piece in a detachable mode.

Preferably, a second nut limiting hole is formed in the mounting plate, a third through hole is formed in the third bus opposite to the second nut limiting hole, and a fourth through hole is formed in the second wiring terminal opposite to the third through hole; the neutral terminal assembly further comprises a second connecting nut, the second connecting nut is located in the upper mounting cavity and limited in a second nut limiting hole, and the fourth connecting piece sequentially penetrates through the fourth through hole and the third through hole from top to bottom and then is in threaded connection with the second threaded hole of the second connecting nut.

Preferably, the insulating support piece comprises a first support piece and a second support piece which are connected in a T shape, the mounting plate comprises a first mounting plate and a second mounting plate which are connected in a T shape, the first mounting plate is positioned in the first support piece, the second mounting plate is positioned in the second support piece, and the upper mounting cavity comprises a first upper mounting cavity positioned above the first mounting plate and a second upper mounting cavity positioned above the second mounting plate; the first nut limiting hole is formed in the first mounting plate, the first connecting nut is arranged in the first upper mounting cavity, and the first bus is detachably connected in the first upper mounting cavity; the second nut limiting hole is formed in the second mounting plate, the second connecting nut is arranged in the second upper mounting cavity, and the third bus is located in the second upper mounting cavity.

Preferably, the second connection terminal is perpendicular to the third bus bar; one side of installation cavity is provided with the opening on the second, second binding post's partial structure passes through the opening is arranged in outside the installation cavity on the second, the opening part is provided with first limit structure, first limit structure is used for the restriction second binding post is in the rotation in the horizontal plane.

Preferably, a fifth through hole is formed in the first mounting plate; the neutral terminal assembly further comprises a third connecting nut, a sixth through hole is formed in the position, right opposite to the fifth through hole, of the first bus, the third connecting nut is arranged on the first side, away from the first mounting plate, of the first bus, and the first connecting piece penetrates through the fifth through hole and the sixth through hole from bottom to top and then is in threaded connection with the third connecting nut.

Preferably, a second limiting structure is arranged on the first supporting piece and is in limited abutting connection with the first wiring terminal.

Preferably, the number of the first connection terminals is two, and the two first connection terminals are disposed at two ends of the first bus bar.

Preferably, the neutral terminal assembly further comprises a grounding screw, a seventh through hole is formed in the first bus, an eighth through hole is formed in the mounting plate, and the grounding screw sequentially penetrates through the seventh through hole and the eighth through hole from top to bottom and then is grounded.

A second object of the utility model is to provide a circuit breaker block terminal, this circuit breaker block terminal is with low costs, and easy operation and efficient are maintained in the dismouting.

To achieve the purpose, the utility model adopts the following technical proposal:

a circuit breaker distribution box comprises a shell and the neutral terminal assembly, wherein the neutral terminal assembly is arranged in the shell.

The utility model has the advantages that:

the utility model provides a neutral terminal subassembly, this neutral terminal subassembly is through utilizing second connecting piece and first coupling nut to connect into an overall structure with first binding post, first generating line and second generating line from top to bottom to and utilize the spacing downthehole fixed spacing in the horizontal plane of having realized this overall structure and insulating support piece of first nut of setting on insulating support piece of first coupling nut, and this kind of spacing method can not produce the influence to this overall structure and insulating support piece separation in vertical side. And, the neutral terminal assembly realizes the fixed connection of the first bus bar and the insulating support by using the first connector from the bottom up. When the neutral terminal assembly needs to be disassembled and maintained, the first connecting piece is disassembled, then any one of the first wiring terminal, the first bus and the second bus applies force upwards vertically, the first wiring terminal, the first bus, the second bus and a cable connected to the first wiring terminal can be integrally disassembled from the insulating support piece, the disassembling and maintaining efficiency is high, the cost is low, and the requirement of a breaker distribution box according to ul is met.

The utility model also provides a circuit breaker block terminal, this circuit breaker block terminal has improved dismouting maintenance efficiency, the cost is reduced through using foretell neutral terminal subassembly to very big degree.

Drawings

Fig. 1 is an exploded view of a neutral terminal assembly provided by an embodiment of the present invention;

fig. 2 is a front view of a neutral terminal assembly provided by an embodiment of the present invention;

fig. 3 is a side view of a neutral terminal assembly provided by an embodiment of the present invention;

fig. 4 is a top view of a neutral terminal assembly provided by an embodiment of the present invention;

FIG. 5 is a cross-sectional view of M-M of FIG. 4;

FIG. 6 is a cross-sectional view of N-N of FIG. 4;

fig. 7 is a schematic structural view of an insulating support member of a neutral terminal assembly provided by an embodiment of the present invention;

fig. 8 is a schematic diagram of a circuit breaker provided by the embodiment of the present invention after a cover plate is removed.

In the figure:

1. an insulating support; 110. a first support member; 120. a second support member; 101. mounting a plate; 1011. a first mounting plate; 1012. a second mounting plate; 102. a first nut limiting hole; 103. a second nut limiting hole; 104. a fifth through hole; 106. an opening; 107. a first limit structure; 108. a second limit structure;

2. a first coupling nut; 3. a first bus bar; 4. a first connecting member; 5. a second bus bar; 6. a second connecting member; 7. a first connection terminal; 8. a third bus bar; 9. a second connection terminal; 10. a third connecting member; 11. a fourth connecting member; 12. a second coupling nut; 13. a ground screw; 14. a third connecting nut;

100. a neutral terminal assembly; 200. a housing.

Detailed Description

The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-7, the present embodiment provides a neutral terminal assembly 100, the neutral terminal assembly 100 being used in a circuit breaker electrical distribution box. Specifically, the neutral terminal assembly 100 includes an insulating support 1, a first connection nut 2, a first bus bar 3, a first connector 4, a second bus bar 5, a second connector 6, and a first connection terminal 7.

Wherein, insulating support piece 1 has the frustum structure of cavity for the inside that adopts insulating plate concatenation to form, and its inside level is provided with mounting panel 101, and mounting panel 101 divide into the cavity of insulating support piece 1 inside and be located the last installation cavity of mounting panel 101 top and be located the lower installation cavity of mounting panel 101 below. The mounting plate 101 is provided with a first nut limiting hole 102, specifically, the first nut limiting hole 102 is located on the top surface of the mounting plate 101 and communicated with the upper mounting cavity, and the first connecting nut 2 is arranged in the upper mounting cavity and limited in the first nut limiting hole 102. Optionally, the first coupling nut 2 is a hexagonal nut, the first nut limiting hole 102 is a hexagonal recessed hole, and the first coupling nut 2 disposed in the first nut limiting hole 102 cannot rotate in a horizontal plane.

The first busbar 3 is arranged in the upper mounting cavity. In this embodiment, the upper mounting cavity is a rectangular cavity with a long strip shape and an open top, and the first bus bar 3 is a long strip plate made of a metal material. The first connecting member 4 detachably connects the first bus bar 3 and the mounting plate 101 from bottom to top. The second bus bar 5 overlaps the first bus bar 3 in parallel and is located at an end of the first bus bar 3. In the present embodiment, the second bus bar 5 is a long strip plate made of a metal material, and the length of the second bus bar 5 is smaller than that of the first bus bar 3. A first through hole is formed in the position, opposite to the first nut limiting hole 102, of the first bus 3, a second through hole is formed in the position, opposite to the first through hole, of the second bus 5, and the second connecting piece 6 penetrates through the second through hole and the first through hole from top to bottom and then is in threaded connection with the first threaded hole of the first connecting nut 2. Optionally, the second connector 6 is a socket head cap screw. The first wiring terminal 7 is connected with the second bus bar 5, and the first wiring terminal 7 is used for an external cable.

The neutral terminal assembly 100 is screwed in the first threaded hole of the first connecting nut 2 after the second connecting piece 6 penetrates through the second bus 5 and the first bus 3 from top to bottom, so that not only is the fixed connection of the first wiring terminal 7, the first bus 3 and the second bus 5 from top to bottom realized, but also the first wiring terminal 7, the first bus 3 and the second bus 5 are connected into an integral structure, and because the first connecting nut 2 is limited and arranged in the first nut limiting hole 102 on the insulating support member 1, the limit fixation of the integral structure and the insulating support member 1 in the horizontal plane is realized, namely the integral structure cannot move relative to the insulating support member 1 in the horizontal direction, and the limit method cannot influence the separation of the integral structure and the insulating support member 1 in the vertical direction. Also, the neutral terminal assembly 100 achieves the above-described fixed connection of the integrated structure and the insulating support 1 in the vertical direction by achieving the fixed connection of the first bus bar 3 and the insulating support 1 from the bottom up by the first connector 4.

When this neutral terminal subassembly 100 is dismantled and is maintained to needs, only need pull down first connecting piece 4, then to forming any one of above-mentioned overall structure's first binding post 7, first generating line 3 and second generating line 5 along vertical upwards application of force, can pull down above-mentioned overall structure from insulating support piece 1, each part after the split can carry out solitary maintenance, the dismouting maintenance efficiency is high, and is with low costs, accords with the requirement that the circuit breaker block terminal is according to ul. In addition, the neutral terminal assembly 100 has a simple structure, and each component is regular, and the component requiring independent mold opening is small, so that the design cost and the manufacturing cost are low.

Optionally, the first connecting member 4 is a screw, threaded holes are formed in opposite positions of the mounting plate 101 and the first bus bar 3, and the screw is screwed into the threaded hole in the mounting plate 101 and the threaded hole in the first bus bar 3 from bottom to top, so that the mounting plate 101 and the first bus bar 3 can be detachably connected. Of course, instead of using screws, it is also possible to provide the first connecting piece 4 as a bolt, as shown in fig. 1, and the neutral terminal assembly 100 also comprises a third connecting nut 14 for cooperating with the bolt. The concrete connection mode of the bolt and the third connecting nut 14 is as follows, a fifth through hole 104 is arranged on the mounting plate 101, a sixth through hole is arranged on the first bus 3 opposite to the fifth through hole 104, the third connecting nut 14 is arranged on the first side of the first bus 3 departing from the mounting plate 101, the nut of the first connecting piece 4 is positioned in the lower mounting cavity, and the screw rod of the first connecting piece 4 penetrates through the fifth through hole 104 and the sixth through hole from bottom to top and then is in threaded connection with the third connecting nut 14. Compared with a screw, the effect of the cooperation disassembly of the bolt and the connecting nut is better, and the first bus 3 and the mounting plate 101 are not easy to damage in the disassembly and assembly process.

Optionally, the fifth through hole 104 and the sixth through hole are both circular through holes. Further optionally, in order to avoid the structural strength of the mounting board 101 being reduced due to the opening, a reinforcing table is disposed on the mounting board 101 at a position where the fifth through hole 104 needs to be opened, and the fifth through hole 104 is penetratingly disposed on the reinforcing table. Further, an anti-slip washer is provided between the third coupling nut 14 and the first bus bar 3.

Further, according to the requirement, the detachable connection of the first bus bar 3 and the mounting plate 101 can be realized by using multiple sets of the first connecting member 4 and the third connecting nut 14, so as to improve the connection stability. In this embodiment, continuing to fig. 1 and 7, two sets of first connecting members 4 and third connecting nuts 14 are provided, two fifth through holes 104 are provided at intervals on the mounting plate 101, two sixth through holes are provided at corresponding positions on the first bus bar 3, and the two first connecting members 4 are threaded with the corresponding third connecting nuts 14 after passing through the corresponding fifth through holes 104 and second through holes, respectively.

With continued reference to fig. 1-6, the neutral terminal assembly 100 also includes a third bus bar 8, a second wire terminal 9, a third connector 10, and a fourth connector 11. Wherein, third generating line 8 sets up with first generating line 3 is perpendicular, and the middle part that third generating line 8's one end passes through third connecting piece 10 and first generating line 3 can be dismantled and be connected, and second binding post 9 is located third generating line 8's top, and fourth connecting piece 11 passes behind second binding post 9 and the other end of third generating line 8 from top to bottom to be dismantled with insulating support piece 1 and be connected.

Optionally, the fourth connecting member 11 is a bolt, and in order to achieve the detachable connection of the fourth connecting member 11 and the insulating support member 1, the neutral terminal assembly 100 further includes a second connecting nut 12, and a second nut limiting hole 103 is disposed on the mounting plate 101, and the second connecting nut 12 is disposed in the upper mounting cavity and limited in the second nut mounting hole. Alternatively, the second coupling nut 12 is a hexagonal nut, the second nut limiting hole 103 is a hexagonal recessed hole, and the second coupling nut 12 disposed in the second nut limiting hole 103 cannot rotate in a horizontal plane. The fourth connecting piece 11 and the second connecting nut 12 are connected in a manner that a third through hole is formed in the third bus bar 8 and is opposite to the second nut limiting hole 103, a fourth through hole is formed in the second wiring terminal 9 and is opposite to the third through hole, and a screw of the fourth connecting piece 11 penetrates through the fourth through hole and the third through hole from top to bottom in sequence and then is connected into a second threaded hole of the second connecting nut 12 in a threaded manner. This kind of connected mode can enough be integrated into a bigger modular unit with second binding post 9, third generating line 8 and above-mentioned overall structure, also can guarantee to pull down first connecting piece 4 after, does not influence this modular unit and whole insulating support piece 1 separation in vertical direction, is convenient for carry out the dismouting and maintains.

Further, since the third bus bar 8 is perpendicular to the first bus bar 3, in order to reduce the volume of the whole neutral terminal assembly 100 on the premise of realizing the installation and the limitation of the two bus bars, as shown in fig. 1, the insulating support 1 includes a first support 110 and a second support 120 which are connected in a T shape, the mounting plate 101 includes a first mounting plate 1011 and a second mounting plate 1012 which are connected in a T shape, the first mounting plate 1011 is located in the first support 110, the second mounting plate 1012 is located in the second support 120, the upper mounting cavity includes a first upper mounting cavity located above the first mounting plate 1011 and a second upper mounting cavity located above the second mounting plate 1012, and the lower mounting cavity includes a first lower mounting cavity located below the first mounting plate 1011 and a second lower mounting cavity located below the second mounting plate.

The first support 110 and the first mounting plate 1011 are mainly used for mounting the first bus bar 3, the second bus bar 5 and the first wiring terminal 7, specifically, the first nut limiting hole 102 is arranged on the first mounting plate 1011, the first connection nut 2 is arranged in the first upper mounting cavity, and the first bus bar 3 is detachably connected in the first upper mounting cavity. The second supporting member 120 and the second mounting plate 1012 are mainly used for mounting the third bus bar 8 and the second connection terminal 9, specifically, the second nut limiting hole 103 is disposed on the second mounting plate 1012, the second connection nut 12 is disposed in the second upper mounting cavity, and the third bus bar 8 is located in the second upper mounting cavity.

With continued reference to fig. 1, in the present embodiment, the second connection terminal 9 is disposed perpendicular to the third bus bar 8, that is, the second connection terminal 9 is disposed parallel to the first bus bar 3, which can further reduce the volume of the neutral terminal assembly 100 because the length of the third bus bar 8 is smaller than the length of the first bus bar 3.

Because the bottoms of the third bus bar 8 and the second connection terminal 9 are disposed in the second upper mounting cavity, and the length of the second connection terminal 9 is greater than the width of the second mounting seat, in order to avoid the second connection terminal 9, as shown in fig. 7, an opening 106 is disposed on one side of the second upper mounting cavity, and a part of the structure of the second connection terminal 9 is disposed outside the second upper mounting cavity through the opening 106. Further, in order to prevent the second connection terminal 9 from rotating in the horizontal direction, a first limit structure 107 is provided at the opening 106, and the first limit structure 107 is used for limiting the rotation of the third bus bar 8 in the horizontal plane. Optionally, the first limiting structure 107 is a first limiting protrusion disposed at the opening 106, and the first limiting protrusion abuts against a side wall of the second connection terminal 9, so as to limit the second connection terminal 9. The first limiting bulges can be arranged in two according to requirements, and the two first limiting bulges are arranged on two sides of the opening 106.

Further, in order to limit the position of the first terminal 7, as shown in fig. 7, the first support 110 is provided with a second limiting structure 108, and the second limiting structure 108 is in limiting contact with the first terminal 7. Optionally, the second limiting structure 108 is a second limiting protrusion arranged outside the first upper mounting cavity, and the second limiting protrusion abuts against the outer wall surface of the first wiring terminal 7, so that the first wiring terminal 7 is limited. According to the demand, the spacing arch of second can set up two, and two spacing protruding interval butts of second are on first binding post 7's lateral wall to promote spacing effect.

With continued reference to fig. 1, the number of the first connection terminals 7 is two, and two first connection terminals 7 are provided at both ends of the first bus bar 3.

With continued reference to fig. 1, the neutral terminal assembly 100 further includes a ground screw 13, a seventh through hole is disposed on the first bus bar 3, an eighth through hole is disposed on the mounting plate 101, and the ground screw 13 sequentially penetrates through the seventh through hole and the eighth through hole from top to bottom and then is grounded. It should be noted that the ground screw 13 is only used in the service equipment system, and in a specific use, the ground screw 13 can maintain effective grounding continuity with the housing in the service equipment system, that is, the ground screw 13 is in contact with the metal housing in the service equipment system, and the metal housing is in contact with the ground, so that the grounding arrangement of the entire neutral terminal assembly 100 is realized. Of course, for non-service equipment, the ground screw 13 may be removed from the neutral terminal assembly 100 to meet ul standard requirements while simplifying the design structure.

Further, in order to avoid the reduction of the structural strength of the mounting board 101 caused by the eighth through hole being formed in the mounting board 101, a reinforcing table is arranged at a position on the mounting board 101 where the eighth through hole needs to be formed, and the eighth through hole penetrates through the reinforcing table.

The present embodiment also provides a circuit breaker distribution box, as shown in fig. 8, that includes a housing 200 and the neutral terminal assembly 100 described above, with the neutral terminal assembly 100 disposed within the housing 200. By using the neutral terminal assembly 100, the breaker distribution box improves the disassembly and assembly maintenance efficiency to a great extent and reduces the cost.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A neutral terminal assembly, comprising:

the insulation support piece (1) comprises a mounting plate (101) and an upper mounting cavity arranged above the mounting plate (101), wherein a first nut limiting hole (102) is formed in the mounting plate (101);

the first connecting nut (2) is arranged in the upper mounting cavity and limited in the first nut limiting hole (102);

the first bus (3) is arranged in the upper mounting cavity, and the first connecting piece (4) detachably connects the first bus (3) with the mounting plate (101) from bottom to top;

the second bus (5) is in parallel lap joint with the first bus (3) and is positioned at the end part of the first bus (3), a first through hole is formed in the position, right opposite to the first nut limiting hole (102), of the first bus (3), a second through hole is formed in the position, right opposite to the first through hole, of the second bus (5), and the second connecting piece (6) penetrates through the second through hole and the first through hole from top to bottom and is in threaded connection with the first threaded hole of the first connecting nut (2);

first binding post (7), first binding post (7) with second generating line (5) are connected, first binding post (7) are used for external cable.

2. The neutral terminal assembly of claim 1,

neutral terminal subassembly still includes third generating line (8), second binding post (9), third connecting piece (10) and fourth connecting piece (11), third generating line (8) with first generating line (3) set up perpendicularly, the one end of third generating line (8) is passed through third connecting piece (10) with the connection can be dismantled in the middle part of first generating line (3), second binding post (9) are located the top of third generating line (8), fourth connecting piece (11) are passed from top to bottom second binding post (9) with behind the other end of third generating line (8) with insulating support piece (1) can dismantle the connection.

3. The neutral terminal assembly of claim 2,

a second nut limiting hole (103) is formed in the mounting plate (101), a third through hole is formed in the position, opposite to the second nut limiting hole (103), of the third bus (8), and a fourth through hole is formed in the position, opposite to the third through hole, of the second wiring terminal (9);

the neutral terminal assembly further comprises a second connecting nut (12), the second connecting nut (12) is located in the upper mounting cavity and limited in a second nut limiting hole (103), and a fourth connecting piece (11) sequentially penetrates through the fourth through hole and the third through hole from top to bottom and then is in threaded connection with the second threaded hole of the second connecting nut (12).

4. The neutral terminal assembly of claim 3,

the insulating support (1) comprises a first support (110) and a second support (120) which are connected in a T shape, the mounting plate (101) comprises a first mounting plate (1011) and a second mounting plate (1012) which are connected in a T shape, the first mounting plate (1011) is positioned in the first support (110), the second mounting plate (1012) is positioned in the second support (120), and the upper mounting cavity comprises a first upper mounting cavity positioned above the first mounting plate (1011) and a second upper mounting cavity positioned above the second mounting plate (1012);

the first nut limiting hole (102) is formed in the first mounting plate (1011), the first connecting nut (2) is arranged in the first upper mounting cavity, and the first bus (3) is detachably connected in the first upper mounting cavity;

the second nut limiting hole (103) is formed in the second mounting plate (1012), the second connecting nut (12) is arranged in the second upper mounting cavity, and the third bus (8) is located in the second upper mounting cavity.

5. The neutral terminal assembly of claim 4,

the second wiring terminal (9) is perpendicular to the third bus bar (8);

one side of the second upper mounting cavity is provided with an opening (106), a partial structure of the second wiring terminal (9) is arranged outside the second upper mounting cavity through the opening (106), a first limiting structure (107) is arranged at the opening (106), and the first limiting structure (107) is used for limiting the rotation of the second wiring terminal (9) in the horizontal plane.

6. The neutral terminal assembly of claim 4,

a fifth through hole (104) is formed in the first mounting plate (1011);

the neutral terminal assembly further comprises a third connecting nut (14), a sixth through hole is formed in the position, right opposite to the fifth through hole (104), of the first bus (3), the third connecting nut (14) is arranged on a first side, away from the first mounting plate (1011), of the first bus (3), and the first connecting piece (4) penetrates through the fifth through hole (104) and the sixth through hole from bottom to top and then is in threaded connection with the third connecting nut (14).

7. The neutral terminal assembly of claim 4,

the first supporting piece (110) is provided with a second limiting structure (108), and the second limiting structure (108) is in limiting abutting connection with the first wiring terminal (7).

8. The neutral terminal assembly of any one of claims 1-7,

the number of the first wiring terminals (7) is two, and the two first wiring terminals (7) are arranged at two ends of the first bus bar (3).

9. The neutral terminal assembly of any one of claims 1-7,

the neutral terminal assembly further comprises a grounding screw (13), a seventh through hole is formed in the first bus (3), an eighth through hole is formed in the mounting plate (101), and the grounding screw (13) sequentially penetrates through the seventh through hole and the eighth through hole to be grounded.

10. A circuit breaker distribution box comprising a housing (200) and the neutral terminal assembly of any of claims 1-9, said neutral terminal assembly being disposed within said housing (200).

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