CN218333651U - Circuit breaker - Google Patents

Abstract

The embodiment of the application provides a circuit breaker, and relates to the field of power distribution equipment. The circuit breaker includes: the device comprises a shell, a linkage piece and an insulating piece. The shell is internally provided with a barrier piece, two sides of the barrier piece are respectively provided with an installation cavity, and independent opening and closing mechanisms are respectively installed in the installation cavities; the barrier member is provided with an opening. The linkage piece penetrates through the blocking piece from the opening and is connected with the switching-on and switching-off mechanisms in different installation cavities, and the linkage piece is used for acting along with the switching-on and switching-off mechanisms so as to assist in indicating the switching-on and switching-off states of the switching-on and switching-off mechanisms. The insulating part is arranged on the linkage part and arranged on one side and/or two sides of the barrier part, and the insulating part is used for preventing electric arcs generated when the opening and closing mechanism opens and penetrates through the opening of the barrier part so as to realize the electrical isolation of a plurality of independent opening and closing mechanisms.

Description

Circuit breaker

Technical Field

The embodiment of the application relates to the field of power distribution equipment, in particular to a circuit breaker.

Background

A circuit breaker is a protection device in a power distribution system, and is used to connect a circuit of the power distribution system when a current in the power distribution system is normal and to disconnect the circuit of the power distribution system when the current in the power distribution system is abnormal. The switching mechanism is a very important component of the circuit breaker, and is used for switching off or switching on the circuit breaker to connect or disconnect a circuit of a power distribution system.

However, in the conventional circuit breaker, the independent switching-on/off mechanisms are easily influenced with each other, and the usability of the circuit breaker is reduced.

SUMMERY OF THE UTILITY MODEL

In view of the above problem, the embodiment of the present application provides a circuit breaker, which alleviates the problem that different opening and closing mechanisms easily affect each other in the existing circuit breaker.

The embodiment of the application provides a circuit breaker. The circuit breaker includes a housing, a linkage member, and an insulating member. The shell is internally provided with a barrier piece, two sides of the barrier piece are respectively provided with an installation cavity, and independent opening and closing mechanisms are respectively installed in the installation cavities; the barrier member is provided with an opening. The linkage piece penetrates through the blocking piece from the opening and is connected with the opening and closing mechanisms in different installation cavities, and the linkage piece is used for acting along with the opening and closing mechanisms so as to assist in indicating the opening or closing state of the opening and closing mechanisms. The insulating part is arranged on the linkage part and arranged on one side and/or two sides of the barrier part, and the insulating part is used for preventing electric arcs generated when the opening and closing mechanism is opened from passing through the opening so as to realize the electrical isolation of a plurality of independent opening and closing mechanisms.

In the technical scheme of this application embodiment, through installation insulating part on the linkage for the insulating part can shelter from the opening of blocking piece, with the insulating isolation of installation cavity of difference, and then with a plurality of independent divide-shut brake mechanism electrical isolation, the electric arc that produces when avoiding the divide-shut brake mechanism separating brake is with a plurality of independent divide-shut brake mechanism electricity connection. In addition, when installing the insulating part on the linkage, the insulating part can move along with the linkage to shelter from the opening all the time at the action in-process, be favorable to improving the insulating part and to the open-ended efficiency of sheltering from.

In some embodiments, along the axial direction of the opening, a projection of the opening falls within a projection of the insulator and a projection of the link.

Through the scheme, no matter what state the switching-on/off mechanism is in, the insulating part can just face the opening so as to shield the opening and make the electric arc difficult to reach the opening.

In some embodiments, the insulator contacts the barrier adjacent a surface of the barrier to prevent arcing through the opening along a gap between the barrier and the insulator.

By the scheme, the gap between the insulating part and the barrier part can be reduced, or no gap is formed between the insulating part and the barrier part, so that the possibility that the electric arc reaches the opening from the gap is reduced.

In some embodiments, an edge portion of the surface of the insulating member facing the barrier is in contact with the barrier.

Through the scheme, in the process that the insulating part acts along with the linkage part, no gap for the electric arc to enter exists between the insulating part and the barrier part, so that the electric arc is prevented from reaching and passing through the opening along the gap.

In some embodiments, the linkage is nested and/or bonded with the insulator.

By the scheme, when the linkage piece is sleeved with the insulating piece, the insulating piece can be arranged on the linkage piece; when the linking member is bonded to the insulating member, the gap between the connecting portions of the insulating member and the linking member can be reduced, and the possibility that an arc reaches the opening of the barrier member from the connecting portion of the insulating member and the linking member can be reduced.

In some embodiments, the insulator is provided with a mounting hole, and the linkage member passes through the mounting hole to be sleeved with the insulator.

Through the scheme, the linkage piece can penetrate through the mounting hole of the insulating piece to be sleeved with the insulating piece, and the mounting of the insulating piece and the linkage piece is achieved.

In some embodiments, the insulating member includes a mounting portion and a separating portion connected to each other, a thickness of the mounting portion is greater than a thickness of the separating portion along an axial direction of the link member, and the mounting hole is provided in the mounting portion.

Through the scheme, the linkage piece can penetrate through the mounting hole of the mounting part to be sleeved with the insulating piece, so that the mounting of the insulating piece and the linkage piece is realized; in addition, along the axial direction of the linkage piece, because the thickness of the installation part is greater than that of the isolation part, the sleeving area of the linkage piece and the insulating piece is increased, and the sleeving firmness of the insulating piece and the linkage piece is improved.

In some embodiments, one end of the mounting portion is flush with the surface of the partition portion and the other end protrudes from the partition portion along the axial direction of the linkage member.

One end of the mounting part is arranged to protrude out of the surface of the isolation part, so that the thickness of the mounting part can be increased, the area of the sleeved joint of the linkage part and the insulating part is increased, and the firmness of the sleeved joint is improved.

In some embodiments, the insulator is provided with a mounting slot, and a portion of the linkage member extends into the mounting slot to nest with the insulator.

Through above-mentioned scheme, the mounting groove that the part of linkage can stretch into the insulating part cup joints with the insulating part, realizes the installation of insulating part and linkage.

In some embodiments, the sleeving part of the linkage part and the insulating part is provided with an adhesive to adhere the linkage part and the insulating part.

By the above scheme, the adhesive can cover the gap of the connecting part of the linkage piece and the insulating piece, and the possibility that the electric arc reaches the opening of the barrier piece along the gap is further reduced. In addition, the adhesive can enable the linkage piece and the insulating piece to be bonded more firmly, and the possibility that the linkage piece is separated from the insulating piece is reduced.

The foregoing description is only an overview of the technical solutions of the embodiments of the present application, and the embodiments of the present application can be implemented according to the content of the description in order to make the technical means of the embodiments of the present application more clearly understood, and the detailed description of the present application is provided below in order to make the foregoing and other objects, features, and advantages of the embodiments of the present application more clearly understandable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

Fig. 1 is a schematic diagram of a circuit breaker in some embodiments of the present application.

FIG. 2 is a schematic view of the assembly of the barrier member, the linkage member and the insulating member in some embodiments of the present application.

Fig. 3 is a first nesting diagram of an insulating member and a linking member according to some embodiments of the present disclosure.

Fig. 4 is a second nesting diagram of the insulating member and the linking member according to some embodiments of the present disclosure.

Fig. 5 is a third nesting diagram of an insulating member and a linking member according to some embodiments of the present disclosure.

Description of reference numerals:

1. a housing; 11. a barrier; 111. an opening; 12. a mounting cavity; 13. a switching-on/off mechanism; 2. a linkage member; 3. an insulating member; 31. mounting holes; 32. an installation part; 33. an isolation section; 34. mounting grooves;

x, axial direction of the opening.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "comprising" and "having," and any variations thereof, in the description and claims of this application and the description of the drawings are intended to cover, but not to exclude, other elements. The word "a" or "an" does not exclude a plurality.

The following description is given with the directional terms as they are used in the drawings and not intended to limit the specific structure of the present application. For example, in the description of the present application, the terms "axial" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like in the description and claims of the present application or in the above-described drawings are used for distinguishing between different objects and not necessarily for describing a particular sequential order, and may explicitly or implicitly include one or more of the features.

In the description of the present application, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly unless otherwise specifically stated and limited, and for example, mechanical structures "connected" or "connected" may refer to physical connections such as snaps, sockets, integral connections, and the like. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The embodiment of the application provides a circuit breaker. Fig. 1 is a schematic diagram of a circuit breaker in some embodiments of the present application. Fig. 2 is a schematic view of the assembly of the barrier member 11, the linkage member 2 and the insulating member 3 according to some embodiments of the present application. As shown in fig. 1 and 2, the circuit breaker includes a case 1, a link 2, and an insulating member 3. The device comprises a shell 1, a baffle 11, mounting cavities 12, independent opening and closing mechanisms 13, a first switch and a second switch, wherein the baffle 11 is arranged in the shell 1, the two sides of the baffle 11 are respectively provided with the mounting cavities 12, and the mounting cavities 12 are respectively internally provided with the independent opening and closing mechanisms 13; the barrier 11 is provided with an opening 111. The linkage piece 2 penetrates through the barrier piece 11 from the opening 111 and is connected with the switching-on/off mechanism 13 in different installation cavities 12, and the linkage piece 2 is used for acting with the switching-on/off mechanism 13 to assist in indicating the switching-on/off state of the switching-on/off mechanism 13. The insulating part 3 is mounted on the linkage part 2 and is arranged on one side and/or two sides of the barrier part 11, and the insulating part 3 is used for preventing electric arcs generated when the switching-on/off mechanism 13 is switched off from passing through the opening 111 so as to realize the electrical isolation of a plurality of independent switching-on/off mechanisms 13.

The housing 1 is a member for mounting the switching mechanism 13. A plurality of independent opening and closing mechanisms 13 can be installed in the housing 1. When a plurality of independent switching-on/off mechanisms 13 are installed in the housing 1, the barrier 11 may be disposed in the housing 1 to form a plurality of mounting cavities 12, and one independent switching-on/off mechanism 13 is installed in each mounting cavity 12. When three independent switching-closing mechanisms 13 are installed in the case 1, a phase a, a phase B, and a phase C of the circuit breaker can be formed.

The switching mechanism 13 is a mechanism for switching the circuit breaker on or off. The switching-on and switching-off mechanism 13 includes a moving contact and a fixed contact, and when the moving contact is in contact with the fixed contact, the circuit breaker is switched on, and when the moving contact is separated from the fixed contact, the circuit breaker is switched off. The moving contact can be connected with a handle in the circuit breaker so as to contact the static contact under the driving action of the handle or be separated from the static contact.

The link 2 is a member that assists in indicating the open or close state of the opening/closing mechanism 13. The linkage 2 can be indirectly connected with the switching-on/off mechanism 13 through a handle, so as to act along with the switching-on/off mechanism 13 and the action of the handle and assist in indicating the switching-on/off state of the switching-on/off mechanism 13. It should be noted that the action process of the linkage 2 along with the opening and closing mechanism 13 and the handle is the same as that of the prior art, and is not described here again. The linkage 2 may be a cylindrical structure, specifically, a cylindrical structure, or a prismatic structure, which is not limited in this application.

When the linkage 2 assists to indicate the opening or closing state of the opening and closing mechanism 13, the auxiliary indication can be realized through the position of the linkage 2. Specifically, the position of the link 2 may be determined by a position sensor, or may be determined by other indicating components (e.g., an indicator light). When the indication is determined by other indication components, for example, an indicator lamp may be provided on a side wall of the housing 1, and the link 2 may approach and contact the indicator lamp with the action of the opening and closing mechanism 13 to make the indicator lamp assume the first indication state, or may separate from the indicator lamp with the action of the opening and closing mechanism 13 to make the indicator lamp assume the second indication state. Specifically, the first indication state may be that the indicator light is on, and the second indication state may be that the indicator light is off.

Based on the above, since the linkage 2 needs to operate in response to the switching mechanism 13, the opening 111 needs to be provided in the barrier 11 to facilitate the operation of the linkage 2. However, when the opening 111 is provided in the barrier 11, an arc generated in the opening process of one independent opening/closing mechanism 13 may pass through the opening 111 to reach another independent opening/closing mechanism 13, and the plurality of independent opening/closing mechanisms 13 in the plurality of mounting cavities 12 may be electrically connected.

Therefore, it is necessary to provide the insulating member 3 to shield the opening 111. When the insulating member 3 blocks the opening 111, the insulating member may be disposed on any side of the barrier member 11, or may be disposed on both sides of the barrier member 11, so as to prevent the arc from passing through the opening 111 to reach other switching mechanisms 13, thereby achieving electrical isolation of the plurality of independent switching mechanisms 13. The insulating member 3 may be provided as a plate-like structure or a block-like structure; when the insulating member 3 is provided in a plate-shaped structure, since the plate-shaped structure has a limited thickness, the possibility that the insulating member 3 affects other components inside the circuit breaker may be reduced. The insulating member 3 may be made of a thermosetting material, wherein the thermosetting material may be silicone rubber, unsaturated polyester resin, or the like, which is not particularly limited in this application.

The insulating member 3 may be mounted to the link member 2 substantially perpendicular to the axial direction of the link member 2 and substantially parallel to the barrier member 11. Wherein, substantially perpendicular means that the angle between the axes of the insulating member 3 and the link member 2 is greater than or equal to 80 ° and less than or equal to 100 °; substantially parallel means that the angle between the insulating element 3 and the barrier element 11 is less than 15. When the insulating member 3 is substantially parallel to the barrier member 11, it can move in a plane substantially parallel to the barrier member 11 with the action of the switching mechanism 13, and the opening 111 is always shielded during the movement.

When the insulating member 3 is mounted on the link 2, the insulating member 3 can efficiently block the opening 111, compared with the case where the insulating member is mounted on another member (for example, the stopper 11). This is because, if the insulating member 3 is mounted on another component (for example, the barrier member 11), the insulating member 3 may not move with the movement of the linkage member 2, and in order to provide the movement space for the linkage member 2, a through hole is required to be formed in the insulating member 3, and the formation of the through hole is obviously disadvantageous for the insulating member 3 to block the opening 111.

In the technical scheme of this embodiment, through installing insulating part 3 on linkage 2 for insulating part 3 can shelter from the opening 111 of blocking part 11, and is insulating isolation with a plurality of installation cavities 12, and then with a plurality of independent divide-shut brake mechanism 13 electrical isolation, the electric arc that produces when avoiding the divide-shut brake mechanism 13 separating brake is with a plurality of independent divide-shut brake mechanism 13 electricity connection. In addition, when installing insulating part 3 on linkage 2, insulating part 3 can move along with linkage 2 to shelter from opening 111 all the time at the action in-process, be favorable to improving insulating part 3 and to the efficiency of sheltering from of opening 111.

According to other embodiments of the present application, please continue to refer to fig. 2, along the axial direction X of the opening 111, the projection of the opening 111 falls within the projection of the insulating member 3 and the projection of the linkage member 2.

The projection of the opening 111 falling within the range of the projection of the insulating member 3 and the projection of the interlocking member 2 means that the projection of the opening 111 falls within the range of the projection of the insulating member 3 and the projection of the interlocking member 2 regardless of the opening and closing mechanism 13 in the opening process, the opening state, the closing process, or the closing state described above.

Along the axial direction X of the opening 111, when the projection of the opening 111 falls within the projection of the insulating member 3 and the projection range of the link member 2, the link member 2 and the insulating member 3 may completely shield the opening 11, and the insulating member 3 may be directly opposite to the opening 111. With this configuration, when the arc passes through the opening 111, the arc can only change its moving direction, go around the edge of the insulating member 3, reach the opening 111 along the gap between the insulating member 3 and the barrier member 2, and change its direction again at the position of the opening 111 to pass through the opening 111, but cannot directly pass through the opening 111 along the axial direction X of the opening 111. In the process of the arc changing direction to pass through the opening 111 many times, the arc may hardly reach the opening 111 or may not reach the opening 111 because the path along which the arc moves is long and the path is curved.

Therefore, in the technical solution of the present embodiment, when the projection of the opening 111 is set to fall within the projection range of the insulating member 3 and the projection range of the interlocking member 2 along the axial direction of the opening 111, the insulating member 3 can face the opening 111 regardless of the state of the opening/closing mechanism 13, so as to shield the opening 111, and thus the arc is difficult to reach the opening 111.

According to other embodiments of the present application, the surface of the insulating member 3 adjacent to the barrier 11 is in contact with the barrier 11 to prevent arcing through the opening 111 along the gap between the barrier 11 and the insulating member 3.

If the surface of the insulating member 3 close to the barrier 11 does not contact the barrier 11, there may be a gap between the insulating member 3 and the barrier 11, and the arc may have a possibility of reaching the opening 111 from the gap and passing through the opening 111.

In the solution of the present embodiment, by disposing the surface of the insulating member 3 close to the barrier member 11 to contact the barrier member 11, the gap between the insulating member 3 and the barrier member 11 can be reduced, or no gap is formed between the insulating member 3 and the barrier member 11, so as to reduce the possibility that the arc reaches the opening 111 from the gap.

According to other embodiments of the present application, the edge portion of the surface of the insulating member 3 facing the barrier 11 is in contact with the barrier 11.

Based on the foregoing description, the insulating member 3 needs to be moved along with the movement of the link 2, and when the insulating member 3 is moved to different positions, the portion of the insulating member 3 that blocks the opening 111 is changed. Therefore, if the middle portion of the surface of the barrier 11 is in contact with the barrier 11 and the other portions are not in contact with each other, the edge portion of the insulating member 3 may be opposite to the opening 111 with the operation of the insulating member 3, and since the edge portion is not in contact with the barrier 11, there is a gap between the edge portion and the barrier 11, and an arc may reach the opening 111 along the gap and pass through the opening 111.

In the technical solution of the present embodiment, by setting the edge portion of the surface of the insulating member 3 facing the barrier member 11 to be in contact with the barrier member 11, a gap for the arc to enter does not exist between the insulating member 3 and the barrier member 11 in the process that the insulating member 3 moves along with the link member 2, so that the arc is prevented from reaching and passing through the opening 111 along the gap.

According to other embodiments of the present application, referring to fig. 3 to 5, the link member 2 is sleeved and/or bonded with the insulating member 3. Specifically, the link 2 may be sleeved with the insulator 3, may be bonded to the insulator 3, and may be sleeved with and bonded to the insulator 3.

When the link 2 is fitted to the insulator 3, there may be a variety of fitting manners.

In the first engaging manner, as shown in fig. 3, the insulating member 3 is provided with a mounting hole 31, and the link member 2 passes through the mounting hole 31 to engage with the insulating member 3.

In this manner, for example, the size of the mounting hole 31 may be the same as that of the linkage member 2 in a direction perpendicular to the axis of the mounting hole 31, so that the insulating member 3 may be interference-fitted with the linkage member 2 through the mounting hole 31. When the insulating member 3 is in interference fit with the linkage member 2, there is substantially no gap between the insulating member 3 and the linkage member 2, that is, an arc is substantially unlikely to reach the opening 111 along the connecting portion of the insulating member 3 and the linkage member 2, which is more advantageous for the insulating member 3 to electrically isolate the plurality of independent opening and closing mechanisms 13. In addition, when the insulating member 3 is in interference fit with the link 2, the insulating member 3 and the link 2 can be connected more firmly, that is, the insulating member 3 is less likely to fall off from the link 2.

In the second socket type, as shown in fig. 4, the insulator 3 includes a mounting portion 32 and a spacer portion 33 connected to each other, the mounting portion 32 has a thickness larger than that of the spacer portion 33 in the axial direction of the link 2, and the mounting hole 31 is provided in the mounting portion 32.

The partition 33 is a main body for blocking the opening 111. The partition 33 may be provided as the aforementioned plate-like structure.

The attachment portion 32 is an auxiliary portion for blocking the opening 111, and is also a portion connected to the link 2. The mounting portion 32 may be disposed at a middle portion of the partition portion 33, or may be disposed at an edge portion of the partition portion 33, which is not limited in the present application. The mounting portion 32 may be provided in various shapes, such as a cylindrical shape having a through hole, a prismatic shape having a through hole, etc., and the specific shape of the mounting portion 32 may be set according to the shape of the link 2, which is not particularly limited in the present application. The mounting hole 31 may be a through hole of the mounting portion 32.

In the technical solution of the embodiment, when the thickness of the mounting portion 32 is greater than the thickness of the isolation portion 33 along the axial direction of the link 2, the link 2 is connected with the mounting portion 32, and compared with the connection with the isolation portion 33, the connection area between the link 2 and the insulating member 3 can be increased, so that the connection firmness between the insulating member 3 and the link 2 is improved.

According to other embodiments of the present application, one end of the mounting portion 32 is flush with the surface of the partition 33 and the other end protrudes from the partition 33 in the axial direction of the link 2.

When one end of the mounting portion 32 protrudes from the isolation portion 33, it may protrude from a surface of the insulator 3 facing the barrier 11, or may protrude from a surface of the insulator 3 facing away from the barrier 11. When the mounting portion 32 protrudes from a surface of the insulating member 3 facing the barrier member 11, a portion of the mounting portion 32 may be located in the opening 111 or pass through the opening 111, and the isolation portion 33 may contact the barrier member 11. When the mounting portion 32 protrudes from a surface of the insulating member 3 away from the barrier member 11, a surface of the isolation portion 33 facing the barrier member 11 and a surface of the mounting portion 32 facing the barrier member 11 can both contact the barrier member 11.

In the technical scheme of this embodiment, one end of the mounting portion 32 is arranged to be flush with the surface of the isolation portion 33, and the other end of the mounting portion is arranged to protrude out of the surface of the isolation portion 33, so that the thickness of the mounting portion 32 can be increased on at least one side of the isolation portion 33, the connection area between the insulating member 3 and the linkage member 2 is increased, and the connection firmness is improved.

According to other embodiments of the present application, both ends of the mounting portion 32 may protrude from the isolation portion 33 in the axial direction of the link 2.

In the technical scheme of this embodiment, both ends of the mounting portion 32 are set to protrude from the surface of the isolation portion 33, so that the thickness of the mounting portion 32 can be further increased on both sides of the isolation portion 33, the connection area between the insulating member 3 and the linkage member 2 is further increased, and the connection firmness is further improved.

In the first sleeving manner and the second sleeving manner, the part of the linkage member 2 penetrating through the insulating member 3 can be close to or far from the indicator light, so that the indicator light is in different states, and the state indication of the shunting and closing mechanism 13 is realized.

In the third engaging manner, as shown in fig. 5, the insulating member 3 is provided with a mounting groove 34, and a portion of the link member 2 extends into the mounting groove 34 to engage with the insulating member 3.

The mounting groove 34 may be provided on a surface of the insulating member 3 facing the barrier member 11 without penetrating the insulating member 3. The mounting groove 34 may be provided as a cylindrical groove or a prismatic groove according to the shape of the link 2, which is not particularly limited in the present application.

The portion of the link 2 may be an end portion of the link 2, and the end portion of the link 2 may extend into the mounting groove 34 to be sleeved with the insulating member 3. Specifically, when the insulating member is sleeved, the size of the mounting groove 34 may be the same as that of the linking member 2, for example, in a direction perpendicular to the linking member 2, so that the linking member 2 may be in interference fit with the insulating member 3 through the mounting groove 34. When the linkage piece 2 is in interference fit with the insulating piece 3, the insulating piece 3 is not easy to separate from the linkage piece 2, and the connection firmness between the linkage piece 2 and the insulating piece is improved.

When the insulating member 3 and the link member 2 are sleeved in the third manner, a hole does not need to be formed in the surface of the insulating member 3 away from the barrier member 11, so that even if there is a gap at the sleeved portion of the insulating member 3 and the link member 2, the arc does not reach the opening 111 along the gap.

When the insulating member 3 and the linking member 2 are sleeved in a third manner, further, a pushing rod may be disposed on a side of the insulating member 3 away from the barrier member 11, so that when the insulating member 3 moves along with the linking member 2, the pushing rod moves along with the insulating member 3 to approach or separate from the indicator, and the indicator is in different states, thereby implementing state indication of the shunting and closing mechanism 13.

When the insulating member 3 is bonded to the interlocking member 2, various bonding methods are also possible.

In some bonding methods, the linking member 2 and the insulating member 3 may be sleeved in the aforementioned sleeving manner, and then an adhesive may be disposed at the sleeving portion between the linking member 2 and the insulating member 3 to bond the linking member 2 and the insulating member 3.

In this bonding method, the adhesive can cover the gap at the connecting portion between the link 2 and the insulator 3, and the possibility of the arc reaching the opening 111 of the barrier 11 along the gap is further reduced. In addition, the adhesive can further firmly adhere the link 2 and the insulating member 3, and the possibility of separating the link 2 from the insulating member 3 is reduced.

In other bonding methods, an adhesive may be provided on the surface of the insulating member 3 facing the link 2, or an adhesive may be provided on the surface of the link 2 facing the insulating member 3, so as to directly bond the insulating member 3 and the link 2.

In this bonding manner, the pushing rod may be disposed on a surface of the insulating member 3 away from the barrier member 11, so that when the insulating member 3 moves along with the link member 2, the pushing rod triggers the indicator light, and the indicator light is in the first state or the second state.

Finally, it should be noted that the circuit breaker in the embodiment of the present application may be a molded case circuit breaker, when three switching-on/off mechanisms 13 need to be disposed inside the molded case circuit breaker, two blocking members 11 and two insulating members 3 may be disposed, the linking member 2 may sequentially pass through the openings 111 of the two blocking members 11, and one insulating member 3 that contacts with each other may be disposed on any side of each blocking member 11, so that the three switching-on/off mechanisms 13 are electrically isolated by the insulating members 3 and the blocking members 11 together.

Those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than others, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (10)

1. A circuit breaker, comprising:

the brake device comprises a shell, wherein a barrier piece is arranged in the shell, mounting cavities are respectively arranged on two sides of the barrier piece, and independent opening and closing mechanisms are respectively mounted in the mounting cavities; the baffle is provided with an opening;

the linkage piece penetrates through the blocking piece from the opening and is connected with the switching-on and switching-off mechanism in different mounting cavities, and the linkage piece is used for acting along with the switching-on and switching-off mechanism so as to assist in indicating the switching-on and switching-off states of the switching-on and switching-off mechanism;

and the insulating part is arranged on the linkage part and is arranged on one side and/or two sides of the barrier part, and the insulating part is used for preventing electric arcs generated when the switching-on and switching-off mechanism is switched off from passing through the opening so as to realize the electrical isolation of a plurality of independent switching-on and switching-off mechanisms.

2. The circuit breaker of claim 1, wherein a projection of the opening falls within a projection of the insulating member and a projection of the link member in an axial direction of the opening.

3. The circuit breaker of claim 1 wherein a surface of said insulator adjacent said barrier contacts said barrier to prevent said arc from passing through said opening along a gap between said barrier and said insulator.

4. The circuit breaker according to claim 3, wherein an edge portion of a surface of said insulating member facing said barrier member is in contact with said barrier member.

5. The circuit breaker of claim 1, wherein the linkage is sleeved and/or bonded with the insulator.

6. The circuit breaker of claim 5, wherein the insulator is provided with a mounting hole, and the link passes through the mounting hole to be sleeved with the insulator.

7. The circuit breaker of claim 6, wherein the insulating member includes a mounting portion and a separating portion connected to each other, a thickness of the mounting portion is greater than a thickness of the separating portion along an axial direction of the link member, and the mounting hole is formed in the mounting portion.

8. The circuit breaker of claim 7, wherein the mounting portion has one end flush with a surface of the isolation portion and the other end protruding from the isolation portion in an axial direction of the link.

9. The circuit breaker of claim 5, wherein the insulator has a mounting slot, and a portion of the link member extends into the mounting slot to nest with the insulator.

10. The circuit breaker according to any one of claims 6 to 9, wherein a socket portion of the link member and the insulating member is provided with an adhesive to bond the link member and the insulating member.

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