CN115346836A - Plug-in circuit breaker - Google Patents

Abstract

The embodiment of the application provides a plug-in circuit breaker, and belongs to the technical field of electrical equipment. The circuit breaker comprises a latch, an electronic release and a pushing structure. The moving contact is connected to the lock catch, the electronic release is provided with an electronic push rod, the stress end of the pushing structure is abutted against the electronic push rod, and the action end faces the lock catch. When the major loop of circuit breaker broke down, even if the electron push rod does not set up towards the hasp, also can transmit the ejecting power of electron push rod to the hasp through supporting this middle transmission part of pushing away the structure, make the hasp anticlockwise rotation to make circuit breaker separating brake. Therefore, the arrangement of the pushing structure can improve the arrangement flexibility of the electronic release while the pushing structure is cooperated with the electronic release to push the lock catch.

Description

Plug-in circuit breaker

Technical Field

The embodiment of the application relates to the technical field of electrical equipment, in particular to a plug-in circuit breaker.

Background

Circuit breakers are important switching devices in electrical power mechanisms that are capable of closing, carrying and breaking current in a circuit. When faults such as electric leakage, overload, short circuit and the like occur in the system, the breaker can control the breaker to open through the electronic release, so that the circuit is cut off, and the fault is prevented from being enlarged.

However, the internal space of the circuit breaker is limited, so that the arrangement of the electronic release in the circuit breaker is not flexible.

Disclosure of Invention

In view of the above problems, the embodiment of the present application provides an insertion type circuit breaker, a push structure is arranged between a latch and an electronic release, and the push structure can be used to push the latch in cooperation with the electronic release, so that the circuit breaker is opened, and the flexibility of arrangement of the electronic release can be improved.

In one aspect of an embodiment of the present application, a plug-in circuit breaker is provided that includes a latch, an electronic release, and a push-against structure. The lock catch is rotatably arranged in the shell of the circuit breaker and is used for being connected with a moving contact of the circuit breaker. The electronic release is arranged in the shell and is provided with an electronic push rod, and the electronic push rod and the rotating shaft of the lock catch are approximately flush along the length direction of the circuit breaker. The pushing structure is rotatably connected to the shell, the stress end of the pushing structure is abutted against the electronic push rod, and the action end of the pushing structure faces the lock catch. When the main circuit of the circuit breaker breaks down, the electronic push rod is ejected out to drive the abutting structure to rotate, and the actuating end abuts against the push lock catch to rotate so as to drive the moving contact to move towards the direction far away from the static contact of the circuit breaker.

Through above-mentioned scheme, set up along the length direction of circuit breaker and support and push away the structure between hasp and electron release, when the major loop of circuit breaker broke down, even if electron push rod does not set up towards the hasp, also can transmit the ejecting power of electron push rod to the hasp through supporting this middle drive disk assembly who pushes away the structure, make hasp anticlockwise rotation to make circuit breaker separating brake. Therefore, the arrangement of the pushing structure can improve the arrangement flexibility of the electronic release while the pushing structure is cooperated with the electronic release to push the lock catch.

In some embodiments, the pushing structure includes a first rotating rod and a second rotating rod connected to each other and forming an angle with each other. The end of the first rotating lever remote from the second rotating lever is configured as a force-receiving end, and the end of the second rotating lever remote from the first rotating lever is configured as an action end.

Through above-mentioned scheme, the tip and the electron push rod butt of second dwang are kept away from to first dwang, and the tip that first dwang was kept away from to the second dwang is towards the hasp, and when moving iron core and drive electron push rod and remove towards the direction that is close to the hasp, electron push rod can drive first dwang clockwise turning for first dwang drives second dwang clockwise turning, thereby makes the second dwang support and pushes away hasp anticlockwise rotation. So, first dwang and second dwang can reliably transmit the power of electron push rod to the hasp, drive the moving contact through the hasp and move towards the direction of keeping away from the static contact, realize the reliable separating brake of circuit breaker.

In some embodiments, a sliding groove is disposed at an end of the electronic push rod close to the latch, the sliding groove has a first abutting wall and a second abutting wall disposed opposite to each other along a moving direction of the electronic push rod, and the sliding groove penetrates through the electronic push rod along a predetermined direction, which is a direction parallel to a rotation plane of the abutting structure. The stress end is provided with a first abutting part which is arranged in the sliding groove and can drive the abutting structure to rotate under the abutting action of the first abutting wall or the second abutting wall.

Through the scheme, the first abutting part is arranged in the sliding groove, and when the electronic push rod is ejected out towards the lock catch, the first abutting wall of the sliding groove abuts against the first abutting part, so that the first abutting part drives the abutting structure to rotate clockwise; when the electronic push rod retracts back to the lock catch, the second abutting wall of the sliding groove abuts against and pushes the first abutting portion, so that the first abutting portion drives the abutting structure to rotate anticlockwise to reset.

In some embodiments, the electronic push rod abuts against the first rotating rod and can rotate by the abutting and pushing structure when the electronic push rod is ejected out.

Through the scheme, the electronic push rod can push the first rotating rod to rotate clockwise when being pushed out, so that the first rotating rod drives the second rotating rod to rotate clockwise, the push structure drives the lock catch to rotate anticlockwise, and the lock catch drives the moving contact to keep away from the static contact, so that the breaker is switched off.

In some embodiments, the force bearing end is provided with a waist-shaped through hole, the waist-shaped through hole extends along the length direction of the first rotating rod, and the waist-shaped through hole penetrates through the first rotating rod along the moving direction of the electronic push rod. The electronic push rod is provided with a second abutting part, the end part of the electronic push rod is arranged in the waist-shaped through hole in a sliding mode, and the second abutting part abuts against the first rotating rod and can abut against the pushing structure to rotate when the electronic push rod is ejected out.

Through above-mentioned scheme, when electronic push rod was ejecting towards the hasp, the second butt portion can support and push away first dwang clockwise turning for first dwang drives second dwang clockwise turning. Therefore, the pushing structure is convenient to drive the lock catch to rotate anticlockwise, the lock catch drives the moving contact to be far away from the static contact, and the breaker is opened.

In some embodiments, a third abutting portion is disposed on a side of the lock catch close to the electronic release, and the third abutting portion is a protrusion or a recess on a side of the lock catch close to the abutting structure. When the circuit breaker is overloaded, the pushing structure is abutted to the third abutting part to drive the lock catch to rotate.

Through the above scheme, can support to push away the hasp for supporting pushing away the structure and provide great butt face, consequently when supporting pushing away the structure and supporting to drive the hasp rotation on third butt portion, can reduce to support to push away the structure and support the possibility that takes place the slippage when pushing away the hasp, improve hasp pivoted reliability to can guarantee the reliable separating brake of circuit breaker.

In some embodiments, the electronic trip unit further has a magnetic yoke including a first side bracket, a bottom bracket, and a second side bracket. First side support and second side support set up relatively, and the bottom sprag is connected in the homonymy of first side support and second side support, and the bottom sprag is relative with the arc extinguishing mechanism position of circuit breaker, and the bottom sprag is configured to move the striking board.

Through the scheme, the bottom support can be used as a part of the magnetic support to play a role in stabilizing a magnetic field generated by the coil, and can also be used as a movable arc striking plate to play a role in connecting and striking an electric arc around the movable contact. The electronic release and the arc extinguishing mechanism can share the structural component of the bottom bracket in the application, and a movable arc striking plate does not need to be specially and additionally arranged, so that the structural component is saved, and the effects of simplifying the structure of the circuit breaker and reducing the volume of the circuit breaker can be achieved.

In some embodiments, the bottom bracket has a gap with an arc chute blade of the arc quenching mechanism adjacent to the electronic trip unit.

Through the scheme, the cutting opportunity can be provided for introducing the electric arc of the arc extinguish chamber for one time, so that the electric arc close to the movable arc striking plate can be cut by the arc extinguishing grid sheet adjacent to the electronic release, the cutting efficiency of the electric arc can be improved, and the arc extinguish efficiency is improved.

In some embodiments, a movable arc ignition angle is arranged between the first side bracket and the bottom bracket, and one end of the movable arc ignition angle, which is far away from the electronic release, faces to a contact position of a movable contact and a fixed contact in the circuit breaker.

Through the scheme, the movable arc striking angle can be connected with electric arcs around the moving contact, so that the electric arcs around the moving contact can quickly jump to the movable arc striking plate to quickly introduce the arc extinguishing chamber, the ablation time of the electric arcs on the moving contact can be reduced, and the possibility of burning loss of the moving contact is effectively reduced.

In some embodiments, the dynamic arc ignition angle is configured in a U-shape or a V-shape.

Through above-mentioned scheme, the structural style of moving the run-on angle of difference is provided, and it is thus clear that the structural style of moving the run-on angle is unfixed, and the electric arc jump that can be convenient for all is moved to the run-on angle of no matter what kind of structure, introduces the explosion chamber with electric arc fast.

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 without creative efforts.

Fig. 1 is a schematic structural diagram of a closing state of an insertion type circuit breaker according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of an opening state of a plug-in circuit breaker according to an embodiment of the present application.

Fig. 3 is a schematic structural diagram of an electronic trip provided in the embodiment of the present application, in which the electronic trip and the push-against structure are matched with each other.

Fig. 4 is a cross-sectional view of the electronic trip unit shown in fig. 3 cooperating with a push structure.

Fig. 5 is a schematic structural diagram of an electronic trip, a push structure, and an operating mechanism provided in an embodiment of the present application.

Description of the reference numerals:

1. an operating mechanism; 11. locking; 111. a third abutting portion; 12. a rotating shaft; 13. jumping and buckling; 2. an electronic trip unit; 21. an electronic push rod; 211. a sliding groove; 212. a first abutment wall; 213. a second abutment wall; 22. a coil; 23. a movable iron core; 24. a stationary core; 25. a yoke; 251. a first side support; 252. a bottom bracket; 253. a second side bracket; 3. a pushing structure; 31. a first rotating lever; 311. a first abutting portion; 32. a second rotating rod; 4. a moving contact; 5. static contact; 6. an arc extinguishing mechanism; 61. a movable arc striking plate; 62. arc extinguishing grid pieces; r, moving arc striking angle; A. a housing; x, the length direction of the breaker; y, width direction of the breaker.

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 obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof in the description and claims of this application and the description of the figures are intended to cover a non-exclusive inclusion.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: there are three cases of A, A and B, and B. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

The directional terms appearing in the following description are directions shown in the drawings and do not limit the specific structure of the plug-in circuit breaker of the present application. For example, in the description of the present application, the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "clockwise," "counterclockwise," and the like are used to indicate an orientation or positional relationship based on that shown in the drawings, merely to facilitate the description of the application and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and therefore, are not to be construed as limiting the application.

Further, expressions of directions of indication such as the X direction and the Y direction for explaining the operation and configuration of each member of the plug-in type circuit breaker of the present embodiment are not absolute but relative, and although these indications are appropriate when each member of the plug-in type circuit breaker is in the position shown in the drawings, when the position is changed, the directions should be interpreted differently to be changed correspondingly.

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, unless otherwise specified, "plurality" means two or more (including two), and similarly, "plural groups" means two or more (including two).

In the description of the present application, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., "connected" or "connected" of a mechanical structure may refer to a physical connection, e.g., a physical connection may be a fixed connection, e.g., a fixed connection by a fastener, such as a screw, bolt, or other fastener; the physical connection can also be a detachable connection, such as a mutual clamping or clamping connection; the physical connection may also be an integral connection, for example, a connection formed by welding, bonding or integral molding. "connected" or "connected" of circuit structures may mean not only physically connected but also electrically connected or signal-connected, for example, directly connected, i.e., physically connected, or indirectly connected through at least one intervening component, as long as the circuits are in communication, or communication between the interiors of two components; signal connection in addition to signal connection through circuitry, may also refer to signal connection through a media medium, such as radio waves. 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.

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a closing state of an insertion type circuit breaker provided in an embodiment of the present application, and fig. 2 is a schematic structural diagram of an opening state of an insertion type circuit breaker provided in an embodiment of the present application. The circuit breaker that this application embodiment provided can be the circuit breaker of long and narrow type, and the length direction X's of circuit breaker size is greater than the width direction Y's of circuit breaker size, and each structure is inside compact arrangement at the circuit breaker. Taking the placement orientation of the circuit breaker in fig. 1 or 2 as an example, the dimension of the circuit breaker in the left-right direction in fig. 1 or 2 is larger than the dimension in the up-down direction, and the left-right direction in fig. 1 or 2 may be determined as the length direction X of the circuit breaker, and the up-down direction in fig. 1 or 2 may be determined as the width direction Y of the circuit breaker. It should be noted that, when the placement orientation of the circuit breaker is changed, the length direction X of the circuit breaker and the width direction Y of the circuit breaker should be changed adaptively.

As shown in fig. 1 and 2, the plug-in circuit breaker includes a latch 11, an electronic trip unit 2, and a push-against structure 3. The latch 11 is rotatably installed in the housing a of the circuit breaker and is used for connecting the movable contact 4 of the circuit breaker. An electronic trip unit 2 is installed in the housing a, and the electronic trip unit 2 has an electronic push rod 21. The pushing structure 3 is rotatably connected to the housing a, a force-bearing end of the pushing structure 3 abuts against the electronic push rod 21, and an action end of the pushing structure 3 faces the lock catch 11. When a main circuit of the circuit breaker breaks down, the electronic push rod 21 is ejected out to drive the pushing structure 3 to rotate, so that the action end pushes the lock catch 11 to rotate, and the movable contact 4 is driven to move towards the direction far away from the static contact 5 of the circuit breaker.

The circuit breaker comprises an operating mechanism 1 for controlling the action of the moving contact 4, the operating mechanism 1 mainly comprises a lock catch 11 and a trip catch 13, and the moving contact 4 is fixed on the lock catch 11. When the circuit breaker is switched on, the lock catch 11 and the trip catch 13 are in a buckled state, the lock catch 11 and the trip catch 13 rotate clockwise, and the moving contact 4 is driven by the lock catch 11 to move towards the direction close to the static contact 5 until the moving contact 4 is contacted with the static contact 5. When the circuit breaker is opened, the lock catch 11 drives the moving contact 4 to rotate anticlockwise, so that the moving contact 4 is separated from the static contact 5, and the lock catch 11 and the trip catch 13 are unlocked to reset the operating mechanism 1.

In a possible implementation manner, a preset portion of the lock catch 11 may be provided with a rotation hole, a portion of the housing a opposite to the rotation hole may be provided with a pin, and the lock catch 11 may be sleeved on the pin through the rotation hole, so that the lock catch 11 may rotate around the pin, and the lock catch 11 is rotatably connected with the housing a. The predetermined position may be a middle position of the lock 11. In another possible implementation manner, the preset portion of the lock catch 11 may be provided with a protrusion, the portion of the housing a opposite to the protrusion may be provided with an accommodating groove, and the protrusion may be abutted in the accommodating groove in a limiting manner, so that the lock catch 11 may rotate around the abutting portion of the protrusion and the accommodating groove to realize the rotation connection of the lock catch 11 and the housing a. The embodiment of the present application does not limit the manner of realizing the rotational connection between the latch 11 and the housing a.

The electronic trip unit 2 is a fault protection mechanism of the circuit breaker. As shown in fig. 3 and 4, the electronic trip 2 includes a coil 22, a movable iron core 23, a stationary iron core 24 and an electronic push rod 21, the coil 22 is sleeved outside the movable iron core 23 and the stationary iron core 24, one end of the electronic push rod 21 is fixedly connected to the movable iron core 23, and the other end of the electronic push rod passes through the stationary iron core 24 and then faces the latch 11. The circuit board of circuit breaker is connected to coil 22's both ends, and when the main circuit of circuit breaker took place to transship, excessive pressure, when the trouble such as excess temperature, coil 22 switched on electricity under the control of this circuit board, produced the electromagnetic force, then produced electromagnetic attraction between movable iron core 23 and quiet iron core 24 for movable iron core 23 moves to the direction that is close to quiet iron core 24 in coil 22. When the movable iron core 23 moves towards the direction close to the static iron core 24, the electronic push rod 21 can be driven to eject.

When the electronic push rod 21 is ejected, if the electronic push rod 21 directly pushes the latch 11 to rotate so as to drive the movable contact 4 to move in a direction away from the stationary contact 5, the electronic push rod 21 must be disposed toward the latch 11, which will certainly limit the arrangement manner of the electronic release 2, and thus the flexibility of the arrangement of the electronic release 2 is not high. When the electronic push rod 21 is disposed toward the latch, in some examples, the electronic release 2 may be arranged substantially side by side with the latch 11 along the length direction X of the circuit breaker to save space in the width direction Y of the circuit breaker. However, in this arrangement, as shown in fig. 1 and 2, the electronic push rod 21 of the electronic release 2 and the rotating shaft 12 of the latch 11 may be substantially flush with each other along the length direction X of the circuit breaker. Wherein the rotating shaft 12 of the lock catch 11 may be a pin or a protrusion as described above. By substantially flush it is meant here that the electric push rod 21 and the rotary shaft 12 at least partially coincide in projection in the length direction X of the circuit breaker.

In this case, if the electronic push rod 21 moves toward the latch 11 until contacting the latch 11, and then continues to move toward the latch 11, the latch 11 may not rotate under the push of the electronic push rod 21, may rotate counterclockwise by a small angle, and may rotate clockwise by a small angle. In other words, in the case where the electronic push rod 21 and the rotating shaft 12 of the latch 11 are substantially flush in the length direction X of the circuit breaker, if the electronic push rod 21 directly extends to push the latch 11, the moving direction of the latch 11 is uncertain, and even if the latch 11 can rotate, only a small angle of rotation is possible. Therefore, when the main circuit of the circuit breaker breaks down, the lock catch 11 can timely rotate towards a determined direction (namely, anticlockwise direction) so as to drive the moving contact 4 to move towards a direction far away from the static contact 5, and the circuit breaker is timely opened.

Based on this, the circuit breaker provided by the embodiment of the application is provided with the pushing structure 3 between the latch 11 and the electronic release 2 along the length direction X of the circuit breaker. Similar to the implementation manner of the rotational connection between the latch 11 and the housing a described above, the push-against structure 3 and the housing a may also be rotationally connected by way of setting a pin shaft and a rotating hole, or may also be rotationally connected by way of setting a protrusion and an accommodating groove, and the detailed description is omitted here. However, it should be emphasized that the pushing structure 3 can drive the latch 11 to rotate counterclockwise only when the pushing structure rotates clockwise in the view of the figure, so as to separate the moving contact 4 from the static contact 5, and therefore, no matter which way the pushing structure 3 and the housing a are rotationally connected, in order to ensure that the pushing structure 3 rotates clockwise when the electronic push rod 21 is ejected, the rotational connection between the pushing structure 3 and the housing a should be disposed between the electronic push rod 21 and the upper sidewall of the housing a. The upper sidewall of the casing a is one of sidewalls of the casing a in the width direction Y of the circuit breaker, which is close to the electronic trip unit 2.

One end of the pushing structure 3 close to the electronic push rod 21 is a stressed end thereof, and one end of the pushing structure 3 close to the latch 11 is an action end thereof. The stressed end of the pushing structure 3 abuts against the electronic push rod 21, and when the movable iron core 23 drives the electronic push rod 21 to eject, the electronic push rod 21 can drive the pushing structure 3 to rotate clockwise. The action end of the pushing structure 3 faces the latch 11, and the pushing structure 3 can push the latch 11 to rotate counterclockwise when rotating clockwise, so that the latch 11 can drive the moving contact 4 to move in a direction away from the static contact 5, and the circuit breaker is opened.

The pushing structure 3 is arranged between the latch 11 and the electronic release 2 along the length direction X of the circuit breaker, and when the electronic push rod 21 is not arranged towards the latch 11, or when the electronic push rod 21 of the electronic release 2 and the rotating shaft 12 of the latch 11 are approximately parallel and level along the length direction X of the circuit breaker, for example, when the electronic push rod 21 directly pushes the latch 11, the latch 11 cannot be guaranteed to move towards the direction beneficial to opening the circuit breaker, and the pushing force of the electronic push rod 21 can be transmitted to the latch 11 through the middle transmission part of the pushing structure 3. It can be seen that the arrangement of the pushing structure 2 can improve the flexibility of the arrangement of the electronic release 2 while pushing the lock catch 11 in cooperation with the electronic release 2. In the embodiment of the application, the electronic release 2 can drive the pushing structure 3 to rotate clockwise when being ejected out, so that the lock catch 11 is indirectly driven to rotate anticlockwise, the certainty of the rotation direction of the lock catch 11 is ensured, the timeliness of the action of the lock catch 11 is also improved, the breaker can be timely and reliably switched off when the main circuit breaks down, and the use safety of the breaker is further improved.

In some embodiments, as shown in fig. 3 and 4, the pushing structure 3 may include a first rotating rod 31 and a second rotating rod 32 connected to each other and forming an angle with each other. The end of the first rotating lever 31 remote from the second rotating lever 32 is configured as a force receiving end, and the end of the second rotating lever 32 remote from the first rotating lever 31 is configured as an action end.

The first rotating lever 31 and the second rotating lever 32 may have the same length or different lengths. The included angle between the first rotating rod 31 and the second rotating rod 32 may be set according to the distance that the electronic push rod 21 is ejected, the lengths of the first rotating rod 31 and the second rotating rod 32, the rotating angles of the first rotating rod 31 and the second rotating rod 32, and the like, for example, the included angle may be 30 degrees, 45 degrees, 90 degrees, 125 degrees, 150 degrees, and the like, and the embodiment of the present application is not limited thereto.

The first rotating rod 31 and the second rotating rod 32 may be integrally formed as the pushing structure 3, or may be formed separately, and then the end portions of the first rotating rod 31 and the second rotating rod 32 close to each other are connected to form the pushing structure 3.

The end of the first rotating rod 31 far from the second rotating rod 32 is the end of the first rotating rod 31 close to the electronic push rod 21, and is also the end of the pushing structure 3 close to the electronic push rod 21. The end of the second rotating rod 32 far from the first rotating rod 31 is the end of the second rotating rod 32 close to the lock catch 11, and is also the end of the pushing structure 3 close to the lock catch 11.

In this embodiment, the end portion of the first rotating rod 31 far from the second rotating rod 32 abuts against the electronic push rod 21, and when the movable iron core 23 drives the electronic push rod 21 to move toward the direction close to the latch 11, the electronic push rod 21 can drive the first rotating rod 31 to rotate clockwise, so that the first rotating rod 31 drives the second rotating rod 32 to rotate clockwise. The end of the second rotating rod 32 away from the first rotating rod 31 faces the latch 11, and the second rotating rod 32 pushes the latch 11 to rotate counterclockwise when rotating clockwise. So, first dwang 31 and second dwang 32 can reliably transmit the power of electron push rod 21 to hasp 11, drive moving contact 4 through hasp 11 and move towards the direction of keeping away from static contact 5, realize the reliable separating brake of circuit breaker.

In order to realize the abutting between the force bearing end of the abutting structure 3 and the electronic push rod 21, in a first possible implementation manner, as shown in fig. 3 and 4, one end of the electronic push rod 21 close to the lock 11 may be provided with a sliding groove 211, the sliding groove 211 has a first abutting wall 212 and a second abutting wall 213 oppositely disposed along a moving direction of the electronic push rod 21, and the sliding groove 211 penetrates through the electronic push rod 21 along a preset direction, which is a direction parallel to a rotation plane of the abutting structure 3. The force-bearing end of the abutting structure 3 has a first abutting portion 311, and the first abutting portion 311 is disposed in the sliding groove 211 and can drive the abutting structure 3 to rotate under the abutting action of the first abutting wall 212 or the second abutting wall 213.

With reference to fig. 1 and fig. 2, the electronic push rod 21 is disposed along a length direction X of the circuit breaker, the electronic push rod 21 has a first end and a second end opposite to each other in the length direction X of the circuit breaker, if an end of the electronic push rod 21 close to the latch 11 is referred to as a first end, an end of the electronic push rod 21 far away from the latch 11 is referred to as a second end, and a wall body between an end surface of the first end and an end surface of the second end is referred to as a side wall of the electronic push rod 21, the sliding groove 211 may be a through groove disposed through the side wall of the electronic push rod 21 at the first end close to the electronic push rod 21 in a direction parallel to a rotation plane of the abutting structure 3. Alternatively, the sliding groove 211 may be a kidney-shaped through groove provided at the first end of the electronic push rod 21, or may be an annular groove formed by inwardly recessing a side wall of the electronic push rod 21 near the first end as shown in fig. 3 and 4.

The sliding groove 211 has a groove wall, the first abutting wall 212 of the sliding groove 211 may be a groove wall of the sliding groove 211 near the second end of the electronic push rod 21, and the second abutting wall 213 of the sliding groove 211 may be a groove wall of the sliding groove 211 near the first end of the electronic push rod 21.

The force-bearing end of the abutting structure 3 is used for abutting against the sliding groove 211, and the abutting structure 3 is driven to rotate integrally under the abutting action of the first abutting wall 212 and the second abutting wall 213 of the sliding groove 211. In order to facilitate the first abutting wall 212 and the second abutting wall 213 to push the force-receiving end, a first abutting portion 311 may be disposed at the force-receiving end, and the first abutting portion 311 may be a structure formed by slightly bending the force-receiving end and substantially parallel to the first abutting wall 212 or the second abutting wall 213, or may be a structure fixed to the force-receiving end and substantially parallel to the first abutting wall 212 or the second abutting wall 213. Here, substantially parallel means substantially parallel, and besides being strictly parallel, it is also within the scope of protection of the present application that the first abutting portion 311 is slightly inclined with respect to the first abutting wall 212 or the second abutting wall 213. The slight inclination may be a small included angle between the first abutting portion 311 and the first abutting wall 212 (for example, the included angle is any value between more than 0 and less than 10 degrees).

It is to be noted that, based on the foregoing description, when the slide groove 211 is an annular groove formed by recessing the side wall of the electronic push rod 21 near the first end inward, as shown in fig. 3, the first abutting portion 311 may be a claw having two arms, and the two arms of the claw may be located in the annular groove from different sides of the annular groove. In the embodiment of the present application, the structure of the sliding groove 211 and the structure of the first abutting portion 311 are not limited.

No matter what kind of structure the sliding slot 211 and the first abutting portion 311 are, the first abutting portion 311 is disposed in the sliding slot 211, when the electronic push rod 21 is ejected out towards the lock catch 11, the first abutting wall 212 of the sliding slot 211 abuts against and pushes the first abutting portion 311, so that the first abutting portion 311 drives the abutting structure 3 to rotate clockwise; when the electronic push rod 21 retracts back to the latch 11, the second abutting wall 213 of the sliding slot 211 abuts against the first abutting portion 311, so that the first abutting portion 311 drives the abutting structure 3 to rotate counterclockwise to reset.

In a second possible implementation manner, the electronic push rod 21 may directly abut against the first rotating rod 31, and the abutting and pushing structure 3 may rotate when the electronic push rod 21 is ejected. For example, the electronic push rod 21 may be located at the right side of the pushing structure 3, and an end of the electronic push rod 21 close to the pushing structure 3 may directly abut against a side of the first rotating rod 31 close to the electronic push rod 21.

Under the circumstance, when the electronic push rod 21 is ejected out towards the latch 11, the electronic push rod 21 can push the first rotating rod 31 to rotate clockwise, so that the first rotating rod 31 drives the second rotating rod 32 to rotate clockwise, the pushing structure 3 drives the latch 11 to rotate counterclockwise, and the latch 11 drives the moving contact 4 to be far away from the static contact 5, so that the circuit breaker is opened. When the electronic push rod 21 retracts back to the latch 11, the push structure 3 may rotate counterclockwise around the rotating shaft 12 of the latch 11 under the action of its own gravity, so as to reset the push structure 3.

In a third possible implementation manner, the force-bearing end of the pushing structure 3 may be provided with a waist-shaped hole, and the waist-shaped hole extends along the length direction of the first rotating rod 31. When the waist-shaped hole is a blind hole with an opening facing the electronic push rod 21, the end of the electronic push rod 21 can abut against the waist-shaped hole, and the abutting-pushing structure 3 can rotate when the electronic push rod 21 is ejected. When the waist-shaped hole penetrates through the waist-shaped through hole of the first rotating rod 31 along the moving direction of the electronic push rod 21, the electronic push rod 21 can be provided with a second abutting portion, the end portion of the electronic push rod 21 is slidably arranged in the waist-shaped through hole, the second abutting portion abuts against the first rotating rod 31, and the abutting and pushing structure 3 can rotate when the electronic push rod 21 is ejected. In this pushing manner, the waist-shaped hole can serve as a guide for the electronic push rod 21, and the electronic push rod 21 is less likely to slip off from the first rotating rod 31.

Taking the waist-shaped hole configured as a waist-shaped through hole as an example, the extension dimension of the waist-shaped through hole along the length direction of the first rotating rod 31 may be greater than or equal to the dimension of the electronic push rod 21 that needs to slide along the waist-shaped through hole in the process of pushing against the pushing structure 3 and driving the moving contact 4 and the static contact 5 to separate, so that the possibility of clamping stagnation in the waist-shaped through hole when the electronic push rod 21 is ejected or retracted can be reduced, and the probability of smooth disconnection of the moving contact 4 and the static contact 5 can also be increased.

The second abutting portion may be a protrusion disposed on a sidewall of the electronic push rod 21 near the first end thereof, and after the first end of the electronic push rod 21 extends into the kidney-shaped through hole, the second abutting portion abuts against a rod wall of the first rotating rod 31.

When the electronic push rod 21 is ejected out of the latch 11, the electronic push rod 21 slides along the waist-shaped through hole, and the second abutting portion abuts against the first rotating rod 31, so that the second abutting portion abuts against the first rotating rod 31 to rotate clockwise in the process that the electronic push rod 21 slides along the waist-shaped through hole, so that the first rotating rod 31 drives the second rotating rod 32 to rotate clockwise. Therefore, the pushing structure 3 is convenient to drive the lock catch 11 to rotate anticlockwise, so that the lock catch 11 drives the moving contact 4 to be far away from the static contact 5, and the breaker is opened.

On the basis of this embodiment, further, the first end of the electronic push rod 21 may be movably connected with a stop structure. The stopping structure may be an annular structure sleeved on a side wall of the first end of the electronic push rod 21, the stopping structure and the second abutting portion are arranged oppositely, and a distance between the stopping structure and the second abutting portion may be slightly larger than a size of the first rotating rod 31 in a moving direction of the electronic push rod 21, so that the stopping structure and the second abutting portion may abut against the side wall of the electronic push rod 21 from opposite two sides. Thus, when the electronic push rod 21 retracts back to the latch 11 along the waist-shaped through hole, the stopping structure will push the first rotating rod 31 to rotate counterclockwise, so that the first rotating rod 31 drives the second rotating rod 32 to rotate counterclockwise, so as to reset the pushing structure 3.

In actual installation, the first end of the electronic push rod 21 may first pass through the waist-shaped through hole, so that the second abutting portion abuts against one side of the first rotating rod 31, and then the stopping structure is installed at the first end of the electronic push rod 21, so that the stopping structure abuts against the other side of the first rotating rod 31. Through the above scheme, when the coil 22 is powered off and the electronic push rod 21 retracts back to the lock catch 11, the stop structure will push the first rotating rod 31 to rotate counterclockwise, so as to release the pushing action of the pushing structure 3 on the lock catch 11 and reset the pushing structure 3.

In some embodiments, as shown in fig. 5, a side of the latch 11 close to the electronic release 2 may be provided with a third abutting portion 111, and the third abutting portion 111 is a protrusion or a recess of a side of the latch 11 close to the pushing structure 3. When the circuit breaker is overloaded, the pushing structure 3 is abutted to the third abutting portion 111, and the lock catch 11 is driven to rotate.

When the third abutting portion 111 is a protrusion on one side of the lock catch 11 close to the abutting structure 3, a portion of the third abutting portion 111 for abutting against the abutting structure 3 may be planar. Thus, the abutting area between the pushing structure 3 and the third abutting portion 111 is increased, and the possibility of slipping when the pushing structure 3 pushes the lock buckle 11 is reduced. When the third abutting portion 111 is a recess on one side of the lock catch 11 close to the pushing structure 3, the depth of the recess can be set to be larger as the space condition allows, so that the possibility of slipping when the pushing structure 3 pushes the lock catch 11 can be reduced.

In this embodiment, through set up third butt portion 111 near one side of pushing away structure 3 at hasp 11, can provide great butt face for pushing away structure 3 and pushing away hasp 11, consequently when pushing away structure 3 and supporting and drive hasp 11 and rotate on third butt portion 111, can reduce to push away structure 3 and push away the possibility that takes place the slippage when pushing away hasp 11, improve hasp 11 pivoted reliability to can guarantee the reliable separating brake of circuit breaker.

In some embodiments, as shown in fig. 3 and 4, the electronic trip unit 2 further has a yoke 25, the yoke 25 including a first side bracket 251, a bottom bracket 252, and a second side bracket 253. The first side bracket 251 and the second side bracket 253 are oppositely arranged, the bottom bracket 252 is connected to the same side of the first side bracket 251 and the second side bracket 253, the bottom bracket 252 is opposite to the arc extinguishing mechanism 6 of the circuit breaker, and the bottom bracket 252 is configured as a movable arc striking plate 61.

The yoke 25 is also called a magnetic mount. The yoke 25 may be formed by integrally molding the first side bracket 251, the bottom bracket 252, and the second side bracket 253, and optionally, the first side bracket 251, the movable arc plate 61, and the second side bracket 253 may be bent from the same magnetic metal plate. Illustratively, a magnetic metal sheet is bent multiple times into a generally U-shape, resulting in three generally straight sections. Two opposite substantially straight sections may be respectively used as the first side bracket 251 and the second side bracket 253, and the substantially straight section between the first side bracket 251 and the second side bracket 253 may be used as the movable arc-striking plate 61. This application is formed first side support 251, move run-on plate 61 and second side support 253 by same magnetic metal sheet bending, can save first side support 251, move the assembly connection process of run-on plate 61 and second side support 253, is convenient for save the processing cost, has improved the manufacturing efficiency of circuit breaker. Wherein a substantially straight section is to be understood as being substantially straight, apart from being straight in the strict sense, a slightly concave or convex structure should also fall within the scope of protection of the substantially straight section of the present application.

It is understood that the yoke 25 may be formed by connecting the first side bracket 251, the bottom bracket 252 and the second side bracket 253 in sequence. The shape and size of the first side bracket 251 and the second side bracket 253 may be the same, and certainly, may also be different, which is not limited in this embodiment of the present application.

The bottom bracket 252 is connected to the first side bracket 251 and the second side bracket 253 on the side close to the arc extinguishing mechanism 6, so that the yoke 25 has a substantially U-shape. When the coil 22 in the electronic trip 2 is energized to generate a magnetic field, the U-shaped yoke 25 can provide a magnetic field loop for the magnetic field, so that magnetic lines of force of the magnetic field are stably transmitted in the magnetic field loop, and the magnetic field is stabilized and magnetic loss is reduced.

The electronic trip unit 2 may be arranged side by side with the arc extinguishing mechanism 6 in the width direction Y of the circuit breaker. As shown in fig. 1, the bottom bracket 252 may be located above the arc extinguishing mechanism 6, and the bottom bracket 252 may serve as a moving arc plate 61 to contact an arc around the moving contact 4 in addition to serving as a part of the yoke 25 to stabilize the magnetic field generated by the coil 22. It can be seen that, in the present application, the electronic release 2 and the arc extinguishing mechanism 6 can share the structural member of the bottom bracket 252, and the special additional arrangement of the movable arc striking plate 61 is not needed, so that the use of the structural member is saved, and the effects of simplifying the structure of the circuit breaker and reducing the volume of the circuit breaker can be achieved.

In some embodiments, the bottom bracket 252 may have a gap with the arc chute 62 of the arc extinguishing mechanism 6 adjacent to the electronic trip unit 2.

The arc extinguishing mechanism 6 includes the explosion chamber, and the explosion chamber can include a plurality of parallel arrangement's arc extinguishing bars piece 62, and for the convenience of arc extinguishing bars piece 62 cuts the electric arc that gets into the explosion chamber to extinguish electric arc fast, a plurality of arc extinguishing bars piece 62 can basically follow the range upon range of setting of the width direction Y of circuit breaker. Here, the term "substantially" means that the stacking direction substantially coincides with the width direction Y of the circuit breaker, or the stacking direction and the width direction Y of the circuit breaker have a small angle (for example, an angle of any value between-10 degrees and 10 degrees), and the stacking direction and the width direction Y of the circuit breaker are understood to be substantially or substantially stacked in the width direction Y of the circuit breaker.

Gaps are formed between every two adjacent arc-extinguishing grid pieces 62 in the plurality of arc-extinguishing grid pieces 62, and the gaps between every two adjacent arc-extinguishing grid pieces 62 can be the same or different, so long as any adjacent arc-extinguishing grid pieces 62 are ensured to be arranged at intervals.

Referring to fig. 1 and 2, the arc chute 62 of the arc chute adjacent to the electronic trip unit 2 is the uppermost arc chute 62 of the arc chute. The bottom bracket 252 is disposed above the arc extinguishing mechanism 6, and if there is no gap between the bottom bracket 252 and the uppermost one of the arc-extinguishing grids 62, the arc introduced into the arc extinguishing chamber cannot be cut by the uppermost one of the arc-extinguishing grids 62, thereby reducing the chance of one-time cutting. And if there is a gap between the bottom bracket 252 and the uppermost one of the arc-extinguishing grid pieces 62, the arc introduced into the arc-extinguishing chamber can be cut by the uppermost one of the arc-extinguishing grid pieces 62, increasing the chance of one-time cutting, and improving the cutting efficiency of the arc, thereby improving the arc-extinguishing efficiency. The gap between the bottom bracket 252 and the uppermost arc chute 62 may be equal to the gap between adjacent arc chutes 62 in the arc chute, and of course, the gap between the bottom bracket 252 and the uppermost arc chute 62 may also be adjusted adaptively due to space or other factors.

In some embodiments, as shown in fig. 4, a dynamic arc starting angle R may be provided between the first side bracket 251 and the bottom bracket 252, and an end of the dynamic arc starting angle R away from the electronic release 2 faces a contact position of the movable contact 4 and the fixed contact 5 in the circuit breaker.

The dynamic arc angle R is used for connecting the electric arc around the moving contact 4, so that the electric arc around the moving contact 4 can jump to the dynamic arc plate 61 quickly and be introduced into the arc extinguish chamber quickly. In some examples, as shown in fig. 2, the dynamic arc ignition angle R may be disposed adjacent to the movable contact 4 after being opened, so that the distance between the dynamic arc ignition angle R and the movable contact 4 after being opened is relatively short, and it is more convenient to connect and ignite an electric arc close to the movable contact 4, so that the electric arc close to the movable contact 4 may rapidly leave the movable contact 4 and be transferred to the dynamic arc ignition angle R, thereby effectively reducing the probability of damage to the movable contact 4.

In some possible implementations, as shown in fig. 2 to 4, the dynamic arc ignition angle R may be an outer convex angle formed by bending a magnetic metal plate between the first side bracket 251 and the dynamic arc ignition plate 61. The outer lobe is a structure extending between the first side bracket 251 and the moving ignition plate 61 toward the contact position of the moving contact 4 and the fixed contact 5. For example, the dynamic arc ignition angle R may be configured to be U-shaped or V-shaped, and the size of the U-shaped or V-shaped opening may be set according to actual needs, which is not limited in this embodiment of the application.

In other possible implementations, the end of the dynamic arc ignition plate 61 close to the movable contact 4 may be bent to form a tilted plate structure tilted toward the contact position between the movable contact 4 and the stationary contact 5, and the tilted plate structure may be used as the dynamic arc ignition angle R. Alternatively, an arc striking structure inclined toward the contact position of the movable contact 4 and the fixed contact 5 may be fixedly connected to the end portion of the movable arc striking plate 61 close to the movable contact 4, and the arc striking structure may be used as the movable arc striking angle R.

It should be noted here that no matter what structure form the dynamic arc ignition angle R is, the dynamic arc ignition angle R can be connected to the electric arc around the moving contact 4, so that the electric arc around the moving contact 4 can jump to the dynamic arc ignition plate 61 quickly and be introduced into the arc extinguishing chamber quickly.

In the embodiment of the application, set up along the length direction X of circuit breaker and support and push away structure 3 between hasp 11 and electronic release 2, when the major loop of circuit breaker broke down, even if electron push rod 21 does not set up towards hasp 11, also can transmit the ejecting force of electron push rod 21 to hasp 11 through supporting and pushing away this middle transmission part of structure 3, make hasp 11 anticlockwise rotation to make circuit breaker separating brake. Therefore, the arrangement of the pushing structure 3 can improve the arrangement flexibility of the electronic release 2 while pushing the lock catch 11 in cooperation with the electronic release 2.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting 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 of the embodiments of the present application.

Claims (10)

1. A plug-in circuit breaker, comprising:

the lock catch is rotatably arranged in the shell of the circuit breaker and is used for connecting a moving contact of the circuit breaker;

an electronic release mounted within the housing, the electronic release having an electronic push rod;

the pushing structure is rotatably connected to the shell, a stress end of the pushing structure is abutted against the electronic push rod, and an action end of the pushing structure faces the lock catch;

when a main circuit of the circuit breaker breaks down, the electronic push rod is ejected out to drive the pushing structure to rotate, so that the action end pushes the lock catch to rotate, and the moving contact is driven to move towards the direction far away from the static contact of the circuit breaker.

2. Plug-in circuit breaker according to claim 1, characterized in that the push-against structure comprises a first and a second rotary lever connected to each other and forming an angle with each other;

the end part of the first rotating rod, which is far away from the second rotating rod, is configured as the force-bearing end, and the end part of the second rotating rod, which is far away from the first rotating rod, is configured as the action end.

3. The plug-in circuit breaker according to claim 2, wherein a sliding slot is provided at an end of the electronic push rod close to the latch, the sliding slot having a first abutting wall and a second abutting wall oppositely disposed along an ejection direction of the electronic push rod, and the sliding slot penetrates through the electronic push rod along a predetermined direction, the predetermined direction being a direction parallel to a rotation plane of the abutting structure;

the force bearing end is provided with a first abutting portion, the first abutting portion is arranged in the sliding groove and can drive the abutting structure to rotate under the abutting action of the first abutting wall or the second abutting wall.

4. The plug-in circuit breaker according to claim 2, characterized in that said electronic push rod abuts against said first rotation rod and is able to push said push structure to rotate when said electronic push rod is ejected.

5. The plug-in circuit breaker according to claim 2, characterized in that the force-bearing end is provided with a kidney-shaped through hole extending in the length direction of the first rotating shaft;

the electronic push rod is provided with a second abutting part, the end part of the electronic push rod is arranged in the waist-shaped through hole in a sliding mode, the second abutting part abuts against the first rotating rod, and the abutting structure can be abutted and pushed to rotate when the electronic push rod is ejected out.

6. The plug-in circuit breaker according to claim 1, wherein a third abutting portion is provided at a side of the latch close to the electronic release, and the third abutting portion is a protrusion or a recess at a side of the latch close to the pushing structure;

when the circuit breaker is overloaded, the pushing structure is abutted to the third abutting part to drive the lock catch to rotate.

7. The plug-in circuit breaker of claim 1, wherein the electronic trip unit further has a magnetic yoke comprising a first side bracket, a bottom bracket, and a second side bracket;

the first side support and the second side support are arranged oppositely, the bottom support is connected to the same side of the first side support and the second side support, the bottom support is opposite to an arc extinguishing mechanism of the circuit breaker in position, and the bottom support is configured to be a movable arc striking plate.

8. The plug-in circuit breaker of claim 7, wherein the bottom bracket has a gap with an arc chute blade of the arc quenching mechanism adjacent to the electronic trip unit.

9. The plug-in circuit breaker according to claim 7 or 8, wherein a dynamic arc striking angle is provided between the first side support and the bottom support, and an end of the dynamic arc striking angle, which is far away from the electronic release, faces a contact position of a movable contact and a fixed contact in the circuit breaker.

10. The plug-in circuit breaker according to claim 9, characterized in that the dynamic run-out angle is configured in a U-shape or a V-shape.

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