CN216957919U

CN216957919U - Circuit breaker shell and circuit breaker

Info

Publication number: CN216957919U
Application number: CN202220490692.2U
Authority: CN
Inventors: 郑永刚; 张慎虎; 李�雨
Original assignee: Ningbo Gongniu Low Voltage Electric Co Ltd
Current assignee: Ningbo Gongniu Low Voltage Electric Co Ltd
Priority date: 2022-03-08
Filing date: 2022-03-08
Publication date: 2022-07-12
Anticipated expiration: 2032-03-08

Abstract

The utility model provides a shell and circuit breaker of circuit breaker belongs to the circuit breaker field. The shell of the circuit breaker comprises a base and a cover plate, wherein the base is connected with the cover plate to form an accommodating cavity in a surrounding mode, and the accommodating cavity is at least used for accommodating a wiring terminal; the base includes diapire and a plurality of lateral wall, the diapire with the apron is relative, the wiring hole of shell and the terminal hole that is used for operating binding post all are located on the lateral wall. By arranging the wiring hole of the housing and the terminal hole for operating the terminal on the side wall of the base instead of forming the wiring hole and the terminal hole after the base and the cover plate are spliced, the housing does not crack even if the applied force is large enough to crack the side wall of the base when the terminal is operated. Therefore, the shell of the circuit breaker is not easy to crack, potential safety hazards are eliminated, and safety is improved.

Description

Shell of circuit breaker and circuit breaker

Technical Field

The present disclosure relates to the field of circuit breakers, and more particularly, to a circuit breaker and a housing thereof.

Background

Circuit breakers are important switching devices in low-voltage electrical appliances and are widely used in electrical lines. The circuit breaker has three protection functions of overload protection, short circuit protection and leakage protection, and when overload, short circuit or leakage occurs in a circuit, the circuit breaker can automatically trip to cut off a power supply so as to ensure the safety of equipment and personnel.

When the circuit breaker is installed, a wire is inserted into a wiring hole of a shell of the circuit breaker, and then the wiring terminal is operated through a terminal hole on the shell, for example, the wiring terminal is screwed by a screwdriver, so that the wiring terminal clamps the wire.

The housing of the circuit breaker typically includes two removable portions that are joined to form the wiring apertures and the terminal apertures. When the terminal is screwed, if too much force is applied, the shell can be split at the joint of the two parts, and certain safety hazards are formed.

SUMMERY OF THE UTILITY MODEL

The embodiment of the disclosure provides a shell of a circuit breaker and the circuit breaker, which can avoid the shell from cracking during wiring. The technical scheme is as follows:

in one aspect, the embodiment of the present disclosure provides a housing of a circuit breaker, where the housing of the circuit breaker includes a base and a cover plate, where the base and the cover plate are connected to form an accommodating cavity, and the accommodating cavity is at least used for accommodating a wiring terminal;

the base includes diapire and a plurality of lateral wall, the diapire with the apron is relative, the wiring hole of shell and the terminal hole that is used for operating binding post all are located on the lateral wall, just the wiring hole with the terminal hole all with the side of lateral wall is spaced each other.

Optionally, a positioning groove is formed between adjacent side walls of the base, and a first positioning protrusion is formed on the edge of the cover plate and located in the positioning groove.

Optionally, the housing further comprises a partition plate located in the accommodating cavity to separate the bottom wall and the cover plate;

the shell has a plurality of wiring holes and a plurality of terminal hole, two wiring holes in a plurality of wiring holes are located same lateral wall, just two wiring holes are located respectively the both sides of baffle, two terminal holes in a plurality of terminal holes are located same lateral wall, just two terminal holes are located respectively the both sides of baffle.

Optionally, the two wiring holes located on the same side wall are arranged in a staggered manner in the depth direction of the terminal hole.

Optionally, the edge of the partition has a second positioning projection, and the second positioning projection is located in the positioning groove.

Optionally, the bottom wall has a positioning pin, the positioning pin is located in the positioning groove, one end of the second positioning protrusion close to the bottom wall has a positioning pin hole, and the positioning pin is located in the positioning pin hole; or,

the bottom wall is provided with a positioning pin hole which is positioned in the positioning groove, one end, close to the bottom wall, of the second positioning bulge is provided with a positioning pin, and the positioning pin is positioned in the positioning pin hole.

Optionally, one end of the first positioning protrusion close to the second positioning protrusion is provided with a positioning pin, one end of the second positioning protrusion close to the first positioning protrusion is provided with a positioning pin hole, and the positioning pin is located in the positioning pin hole; or,

one end, close to the second positioning bulge, of the first positioning bulge is provided with a positioning pin hole, one end, close to the first positioning bulge, of the second positioning bulge is provided with a positioning pin, and the positioning pin is located in the positioning pin hole.

Optionally, both surfaces of the partition board are provided with first grooves, and the surfaces of the bottom wall and the cover board close to the partition board are provided with second grooves;

the second groove of the bottom wall and the first groove on one surface of the partition board close to the bottom wall enclose a first cylindrical channel, and one end of the first cylindrical channel is opposite to one terminal hole;

the second groove of the cover plate and the first groove of one surface, close to the cover plate, of the partition plate enclose a second cylindrical channel, and one end of the second cylindrical channel is opposite to the other terminal hole.

Optionally, the base, the partition plate and the cover plate are connected by rivets.

In another aspect, the embodiment of the present disclosure further provides a circuit breaker, which includes a connection terminal and a housing of the circuit breaker as described in the previous aspect, where the connection terminal is located in the accommodating cavity of the housing.

The beneficial effects brought by the technical scheme provided by the embodiment of the disclosure at least comprise:

by arranging the wiring hole of the housing and the terminal hole for operating the terminal on the side wall of the base instead of forming the wiring hole and the terminal hole after the base and the cover plate are spliced, the housing does not crack even if the applied force is large enough to crack the side wall of the base when the terminal is operated. Therefore, the shell of the circuit breaker is not easy to crack, potential safety hazards are eliminated, and safety is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is apparent that the drawings in the description below are only some embodiments of the present disclosure, and it is obvious for those skilled in the art that other drawings may be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an outer case of a circuit breaker according to an embodiment of the present disclosure;

fig. 2 is an exploded view of the housing of the circuit breaker of fig. 1;

fig. 3 is a schematic structural diagram of a housing of another circuit breaker provided by the embodiment of the disclosure;

fig. 4 is an exploded view of the housing of the circuit breaker of fig. 3;

FIG. 5 is a schematic structural diagram of a base according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a separator according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a cover plate according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a circuit breaker according to an embodiment of the present disclosure.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," "third," and similar terms in the description and claims of the present disclosure are not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, which may also change accordingly when the absolute position of the object being described changes.

Fig. 1 is a schematic structural diagram of an outer case of a circuit breaker according to an embodiment of the present disclosure. As shown in fig. 1, the housing of the circuit breaker includes a base 20 and a cover 30, the base 20 is connected to the cover 30, and the base 20 and the cover 30 are detachably connected, for example.

Fig. 2 is an exploded view of the housing of the circuit breaker of fig. 1. To facilitate a more intuitive understanding of the present example, a wire connecting terminal 10 is also shown in fig. 2. As shown in fig. 2, the base 20 and the cover 30 are connected to define a receiving cavity for receiving at least the connecting terminal 10. For example, a trip mechanism, an arc extinguisher, a connection terminal, etc. of the circuit breaker may be installed inside the receiving chamber.

As shown in fig. 2, the base 20 includes a bottom wall 21 and a plurality of side walls 22, the bottom wall 21 is opposed to the cover 30, the wiring holes 22a of the housing and the terminal holes 22b for operating the wiring terminals 10 are located on the side walls 22, and the wiring holes 22a and the terminal holes 22b are spaced apart from the side edges of the side walls 22. That is, the wiring holes 22a and the terminal holes 22b are formed only on the side walls 22 of the base 20, not formed by splicing the base 20 and the cover 30.

The terminal 10 includes a clamping portion 11 and a screwing portion 12, and by screwing the screwing portion 12, a wire can be clamped in the clamping portion 11 or released so that the wire can be taken out from the clamping portion 11. When the terminal 10 is mounted, the wire clamping portion 11 faces the wire connection hole 22a, and the screw portion 12 faces the terminal hole 22 b. When the wiring is performed, the wire is inserted into the housing from the wiring hole 22a and inserted into the wire clamping portion 11 of the terminal 10, the screwdriver is inserted into the housing from the terminal hole 22b, and the screw portion 12 is screwed to clamp the wire in the wire clamping portion 11.

By arranging both the wiring holes 22a of the housing and the terminal holes 22b for operating the terminal 10 on the side walls 22 of the base 20, instead of forming the wiring holes 22a and the terminal holes 22b by splicing the base 20 and the cover 30, the housing does not crack even if a large force is applied when the terminal 10 is operated, as long as it is not enough to crack the side walls 22 of the base 20. Therefore, the shell of the circuit breaker is not easy to crack, potential safety hazards are eliminated, and safety is improved.

The wiring terminal 10 can be arranged close to the side wall 22 of the base 20, so that the distance between the wiring terminal 10 and the wiring hole 22a and the distance between the wiring terminal 10 and the terminal hole 22b are reduced, wiring can be facilitated, and a large space in the middle of the accommodating cavity can be reserved for arranging a tripping mechanism, an arc extinguisher and other structures. Wiring holes 22a and terminal holes 22b may be located on adjacent side walls 22 of the base 20 to facilitate wiring.

As shown in FIG. 2, the adjacent side walls 22 of the base 20 have positioning slots 22c therebetween, and the edge of the cover 30 has first positioning protrusions 301, wherein the first positioning protrusions 301 are located in the positioning slots 22 c.

When the cover plate 30 is mounted on the base 20, the first positioning protrusions 301 are matched with the positioning grooves 22c, so that the alignment accuracy of the cover plate 30 and the base 20 can be improved, the cover plate 30 and the base 20 can be prevented from deforming, and a large gap is prevented from being formed at a joint of the cover plate 30 and the base 20.

Alternatively, the cover plate 30 and the base plate 20 may be connected by rivets 40. After the cover plate 30 is assembled with the base 20 by the engagement of the first positioning protrusions 301 with the positioning grooves 22c, the connection is made by the rivets 40. The cooperation of first location arch 301 and constant head tank 22c has improved the assembly precision, makes things convenient for rivet 40's setting, adopts rivet 40 to connect also the dismantlement of being convenient for.

As an example, two connection terminals 10 may be disposed in the case of the circuit breaker shown in fig. 1 and 2, and the two connection terminals 10 are respectively located at opposite sides of the base 20. In other examples, the housing of the circuit breaker may accommodate a greater number of wire terminals, and accordingly, the housing has a plurality of wire connection holes 22a and a plurality of terminal holes 22b, the number of wire connection holes 22a and the number of terminal holes 22b being the same as the wire terminals 10.

For example, fig. 3 is a schematic structural diagram of a housing of another circuit breaker provided in an embodiment of the present disclosure. Fig. 4 is an exploded view of the housing of the circuit breaker of fig. 3. To facilitate a more intuitive understanding of the present example, a wire connecting terminal 10 is also shown in fig. 4. As shown in fig. 3 and 4, the case of the circuit breaker includes a partition 50 in addition to the base 20 and the cover 30. A partition 50 is located in the receiving cavity, separating the bottom wall 21 and the cover plate 30. The case of the circuit breaker may accommodate 4 connection terminals 10, two of the connection terminals 10 being located at one side of the base 20 and the other two connection terminals 10 being located at the other side of the base 20. Accordingly, the case of the circuit breaker has 4 wiring holes 22a and 4 terminal holes 22 b.

In the embodiment of the present disclosure, taking two connection terminals 10 located on the same side of the base 20 as an example, two connection holes 22a of the 4 connection holes 22a are located on the same side wall 22, and the two connection holes 22a are located on two sides of the partition 50 respectively. Two terminal holes 22b of the 4 terminal holes 22b are located on the same side wall 22, and the two terminal holes 22b are located on both sides of the partition plate 50, respectively.

The wiring holes 22a and the terminal holes 22b are arranged on the side wall 22 of the base 20 to prevent the housing from being cracked when the screw portion 12 of the junction terminal 10 is screwed. By arranging more wiring holes 22a and terminal holes 22b on the shell, the shell can accommodate more wiring terminals 10, and the wiring mode of the circuit breaker is enriched. The two connecting terminals 10 on the same side are separated by the partition plate 50, so that the insulation between the two connecting terminals 10 is improved, and the short circuit between the two connecting terminals 10 is avoided. In addition, the arrangement of the partition plate 50 can further improve the structural strength of the housing, so that the housing is not easy to deform.

As shown in fig. 4, the two wiring holes 22a located on the same side wall 22 are arranged offset in the depth direction of the terminal hole 22 b.

The areas of lower structural strength on the housing are typically near the hole structure. Two wiring holes 22a are provided on the same side wall 22, and if the two wiring holes 22a are arranged side by side, in order to provide the side wall 22 with sufficient structural strength, the two wiring holes 22a need to have a sufficient distance therebetween, resulting in an increase in the thickness of the circuit breaker. The thickness of the circuit breaker refers to the spacing between the cover plate 30 and the bottom wall 21. By arranging the two wiring holes 22a in a staggered manner in the depth direction of the terminal hole 22b, the side wall 22 can have sufficient structural strength without increasing the thickness of the circuit breaker.

As shown in fig. 4, the edge of the partition 50 has a second positioning projection 501, and the second positioning projection 501 is located in the positioning groove 22 c.

The barrier 50 is mounted to the base 20 prior to the cover plate 30 when assembling the circuit breaker. Through the cooperation of the second positioning protrusion 501 and the positioning groove 22c, the alignment accuracy of the partition board 50 and the base 20 can be improved, so that the partition board 50 can be more stably installed in the base 20, and the partition board 50 is prevented from loosening between the installation cover plates 30. It is also possible to prevent the housing from being deformed and to prevent a large gap from being formed at the joint of the partition plate 50 and the base 20.

The first positioning protrusion 301 of the cover plate 30 and the second positioning protrusion 501 of the partition plate 50 are matched with the same positioning groove 22c, so that the structure of the housing is more compact.

Fig. 5 is a schematic structural diagram of a base provided in an embodiment of the present disclosure. As shown in fig. 5, the bottom wall 21 of the base 20 has positioning pins 211, and the positioning pins 211 are located in the positioning grooves 22 c. Fig. 6 is a schematic structural diagram of a separator according to an embodiment of the present disclosure. The side of the partition 50 adjacent to the base 20 is shown in fig. 6. As shown in fig. 6, one end of the second positioning projection 501 near the bottom wall 21 has a positioning pin hole 501 a. The positioning pin 211 is located in the positioning pin hole 501 a.

When the partition board 50 is mounted on the base 20, the second positioning protrusion 501 is snapped into the positioning groove 22c, and the positioning pin hole 501a is sleeved outside the positioning pin 211, and the positioning pin 211 and the positioning pin hole 501a form a fit, so that the partition board 50 can be mounted on the base 20 more accurately and more stably.

In other examples, the positions of the alignment pins 211 and the alignment pin holes 501a may be interchanged. That is, the bottom wall 21 has a positioning pin hole 501a, the positioning pin hole 501a is located in the positioning groove 22c, one end of the second positioning projection 501 close to the bottom wall 21 has a positioning pin 211, and the positioning pin 211 is located in the positioning pin hole 501 a. The same effect can be achieved.

As shown in fig. 4, one end of the first positioning protrusion 301 close to the second positioning protrusion 501 has a positioning pin 211, one end of the second positioning protrusion 501 close to the first positioning protrusion 301 has a positioning pin hole 501a, and the positioning pin 211 is located in the positioning pin hole 501 a.

The first positioning projection 301 and the second positioning projection 501 are brought into engagement by the positioning pin 211 and the positioning pin hole 501 a. When the cover plate 30 is installed, the first positioning protrusion 301 of the cover plate 30 is snapped into the positioning groove 22c, and the positioning pin 211 at the end of the first positioning protrusion 301 is inserted into the positioning pin hole 501a at the end of the second positioning protrusion 501, and the positioning pin 211 and the positioning pin hole 501a form a fit, so that the cover plate 30 can be installed more accurately and more stably in the base 20.

Likewise, in other examples, the positions of the positioning pins 211 and the positioning pin holes 501a on the first positioning projection 301 and the second positioning projection 501 may be interchanged. That is, one end of the first positioning protrusion 301 close to the second positioning protrusion 501 is provided with a positioning pin hole 501a, one end of the second positioning protrusion 501 close to the first positioning protrusion 301 is provided with a positioning pin 211, and the positioning pin 211 is located in the positioning pin hole 501 a. The same effect can be achieved.

As shown in fig. 4 and 6, both surfaces of the partition plate 50 have first grooves 500a, and the surface of the bottom wall 21 adjacent to the partition plate 50 has second grooves 21 a. Fig. 7 is a schematic structural diagram of a cover plate according to an embodiment of the present disclosure. The cover plate 30 is shown on the side adjacent to the baffle 50 in fig. 7. As shown in fig. 7, the surface of the cap plate 30 adjacent to the partition plate 50 also has a second groove 21 a.

The second groove 21a of the bottom wall 21 and the first groove 500a of the partition plate 50 on the side close to the bottom wall 21 enclose a first cylindrical passage, one end of which is opposite to one terminal hole 22 b.

The second groove 21a of the cap plate 30 and the first groove 500a of the partition plate 50 on the side close to the cap plate 30 enclose a second cylindrical passage, and one end of the second cylindrical passage is opposite to the other terminal hole 22 b.

When the connection terminal 10 is mounted, two connection terminals 10 are respectively disposed on both sides of the partition plate 50, and the screw portion 12 of one connection terminal 10 may be located in the first cylindrical passage and the screw portion 12 of the other connection terminal 10 may be located in the second cylindrical passage. The first cylindrical passage and the second cylindrical passage are formed by two portions, which can facilitate the installation of the connection terminal 10. When the screw part 12 of the junction terminal 10 is screwed, a driver may protrude into the first cylindrical passage or the second cylindrical passage through the terminal hole 22 b.

The base 20, the partition 50 and the cover 30 may be connected by the rivet 40 when assembling the case of the circuit breaker. For example, the rivet 40 passes through the cover plate 30, the spacer 50, and the base 20 in sequence, and then is coupled to the base 20. Alternatively, the rivet 40 passes through the base 20, the partition 50, and the cover 30 in sequence, and then is coupled to the cover 30.

The disclosed embodiment also provides a circuit breaker, which comprises a wiring terminal and the shell of any one of the circuit breakers shown in the figures 1-7.

For example, fig. 8 is a schematic structural diagram of a circuit breaker according to an embodiment of the present disclosure. As shown in fig. 8, the circuit breaker includes a connection terminal 10 and a case 200 of the circuit breaker shown in fig. 3. The terminal 10 is located in the receiving cavity of the housing 200.

A trip mechanism, an arc extinguisher, and the like may be further installed in the receiving cavity of the case 200 of the circuit breaker.

The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.

Claims

1. A shell of a circuit breaker is characterized by comprising a base (20) and a cover plate (30), wherein the base (20) and the cover plate (30) are connected to enclose a containing cavity, and the containing cavity is at least used for containing a wiring terminal (10);

the base (20) includes a bottom wall (21) and a plurality of side walls (22), the bottom wall (21) is opposite to the cover plate (30), wiring holes (22a) of the housing and terminal holes (22b) for operating the wiring terminals (10) are located on the side walls (22), and the wiring holes (22a) and the terminal holes (22b) are spaced apart from the sides of the side walls (22).

2. The circuit breaker casing according to claim 1, wherein a positioning groove (22c) is formed between the adjacent side walls (22) of the base (20), and the edge of the cover plate (30) has a first positioning protrusion (301), and the first positioning protrusion (301) is located in the positioning groove (22 c).

3. The circuit breaker casing of claim 2 further comprising a partition (50), said partition (50) being located in said housing chamber, separating said bottom wall (21) and said cover plate (30);

the housing has a plurality of wiring holes (22a) and a plurality of terminal holes (22b), two wiring holes (22a) among the plurality of wiring holes (22a) are located on the same side wall (22), and the two wiring holes (22a) are located respectively at both sides of the partition plate (50), two terminal holes (22b) among the plurality of terminal holes (22b) are located on the same side wall (22), and the two terminal holes (22b) are located respectively at both sides of the partition plate (50).

4. The case of circuit breaker according to claim 3, wherein the two wiring holes (22a) located at the same side wall (22) are arranged offset in the depth direction of the terminal hole (22 b).

5. The circuit breaker casing according to claim 3, wherein the edge of the barrier (50) has a second positioning projection (501), and the second positioning projection (501) is located in the positioning groove (22 c).

6. The circuit breaker casing according to claim 5, wherein the bottom wall (21) has a positioning pin (211), the positioning pin (211) is located in the positioning slot (22c), one end of the second positioning protrusion (501) close to the bottom wall (21) has a positioning pin hole (501a), and the positioning pin (211) is located in the positioning pin hole (501 a); or,

the bottom wall (21) is provided with a positioning pin hole (501a), the positioning pin hole (501a) is positioned in the positioning groove (22c), one end, close to the bottom wall (21), of the second positioning bulge (501) is provided with a positioning pin (211), and the positioning pin (211) is positioned in the positioning pin hole (501 a).

7. The case of the circuit breaker according to claim 5, wherein one end of the first positioning protrusion (301) close to the second positioning protrusion (501) is provided with a positioning pin (211), one end of the second positioning protrusion (501) close to the first positioning protrusion (301) is provided with a positioning pin hole (501a), and the positioning pin (211) is positioned in the positioning pin hole (501 a); or,

one end, close to the second positioning protrusion (501), of the first positioning protrusion (301) is provided with a positioning pin hole (501a), one end, close to the first positioning protrusion (301), of the second positioning protrusion (501) is provided with a positioning pin (211), and the positioning pin (211) is located in the positioning pin hole (501 a).

8. The case of a circuit breaker according to any of claims 3 to 7, wherein both sides of the partition (50) have first grooves (500a), and the bottom wall (21) and the surface of the cover plate (30) adjacent to the partition (50) have second grooves (21 a);

the second groove (21a) of the bottom wall (21) and the first groove (500a) of the partition board (50) on the surface close to the bottom wall (21) enclose a first cylindrical channel, and one end of the first cylindrical channel is opposite to one terminal hole (22 b);

the second groove (21a) of the cover plate (30) and the first groove (500a) of the side, close to the cover plate (30), of the partition plate (50) enclose a second cylindrical channel, and one end of the second cylindrical channel is opposite to the other terminal hole (22 b).

9. The circuit breaker housing of any one of claims 3 to 7 wherein said base (20), said partition (50) and said cover (30) are connected by rivets (40).

10. A circuit breaker, characterized by comprising a terminal (10) and a housing (200) of the circuit breaker according to any one of claims 1 to 9, the terminal (10) being located in a receiving cavity of the housing (200).