Circuit breaker

Abstract

The utility model discloses a circuit breaker, and each polar space is internally provided with an electromagnetic release. The electromagnetic release comprises a solenoid, a movable iron core, a static iron core, an actuating rod and a striking rod; the solenoid belongs to one part of the main loop conductor assembly and at least surrounds the static iron core, and the actuating rod is located outside the solenoid; the static iron core is arranged on one side of the movable iron core, the actuating rod and the movable iron core move synchronously, and the moving direction of the movable iron core is parallel to the length direction of the base. The beating rod is rotationally arranged relative to the base, the first end of the beating rod extends to the side of a tripping shaft of the operating mechanism and is used for being matched with the tripping shaft, and the second end of the beating rod extends to the side of the actuating rod and is used for being matched with the actuating rod; when the electromagnetic tripper is actuated, the movable iron core drives the actuating rod to move synchronously, and the actuating rod drives the beating rod to rotate, so that the tripping shaft is driven to rotate; the tripping device has the advantages of being novel in structure and good in tripping force.

Description

Technical Field

[0001] The present application relates to the electrical field, and more particularly to a circuit breaker. Background Art

[0002] In the field of circuit breakers, mechanical instantaneous protection is often achieved through an electromagnetic tripping system.

[0003] For large molded case circuit breakers, due to the large rated current, the electromagnetic tripping system of the snap-on structure can often achieve the corresponding function.

[0004] However, for some molded case circuit breakers with smaller frames, such as molded case circuit breakers with a frame below 250A, the snap-on electromagnetic release system may have insufficient pull-in force.

[0005] The solenoid-type electromagnetic tripping system can achieve a relatively stable actuation effect under a relatively small current, which has been fully verified in small circuit breakers.

[0006] However, since there are significant differences in the structures of molded case circuit breakers and miniature circuit breakers, how to apply the screw-type electromagnetic tripping system to molded case circuit breakers is undoubtedly a challenge. Summary of the invention

[0007] In view of this, the purpose of this application is to overcome the deficiencies in the prior art and to provide a circuit breaker.

[0008] The present application provides: a circuit breaker, which includes a base and an operating mechanism, wherein at least two pole spaces are arranged side by side along the width direction of the base, and a main circuit conductor assembly is arranged in each pole space; wherein an electromagnetic release is arranged in each pole space; the electromagnetic release includes a solenoid, a moving iron core, a stationary iron core, an actuating rod and a hitting rod; the solenoid is a part of the main circuit conductor assembly, the solenoid is at least arranged around the stationary iron core, and the actuating rod is located outside the solenoid; the stationary iron core is arranged on one side of the moving iron core, the actuating rod and the moving iron core are arranged for synchronous movement, and the movement direction of the moving iron core is arranged parallel to the length direction of the base; the hitting rod is arranged to rotate relative to the base, the first end of the hitting rod extends to the side of the tripping shaft of the operating mechanism for cooperating with the tripping shaft, and the second end of the hitting rod extends to the side of the actuating rod for cooperating with the actuating rod; when the electromagnetic release is actuated, the moving iron core drives the actuating rod to move synchronously, and the actuating rod prompts the hitting rod to rotate, thereby causing the tripping shaft to rotate.

[0009] In some embodiments of the present application, the end of the actuating rod away from the solenoid is the driving end, and the second end of the hitting rod is located on the side of the driving end away from the solenoid. When the electromagnetic release is actuated, the actuating rod moves in a direction away from the solenoid, pushing the hitting rod to rotate.

[0010] In some embodiments of the present application, the end of the actuating rod away from the solenoid is the driving end, and the second end of the hitting rod is located between the driving end and the solenoid. When the electromagnetic release is actuated, the actuating rod moves in the direction of the solenoid, pulling the hitting rod to rotate.

[0011] In some embodiments of the present application, a rotating shaft is provided on the hitting rod, a rotating groove is provided on the base, and the hitting rod is rotatably connected with the rotating groove via the rotating shaft.

[0012] In some embodiments of the present application, the hitting rod is provided with a rotating shaft portion, and the base is provided with a rotating groove, and the hitting rod is rotatably connected with the rotating groove via the rotating shaft portion.

[0013] In some embodiments of the present application, a bracket is further included, wherein the bracket is fixed to the base, a rotating shaft is passed through the hitting rod, and the rotating shaft and the bracket are rotatably arranged.

[0014] In some embodiments of the present application, a bracket is further included, wherein the bracket is fixed to the base, and a rotating shaft portion is provided on the driving rod, and the rotating shaft portion is rotatably arranged with the bracket.

[0015] In some embodiments of the present application, a bracket is further included, the main circuit conductor assembly includes a hard busbar, the bracket is fixed to the hard busbar, a rotating shaft is passed through the rod, and the rotating shaft and the bracket are rotatably arranged.

[0016] In some embodiments of the present application, a bracket is further included, the main circuit conductor assembly includes a hard busbar, the bracket is fixed to the hard busbar, a rotating shaft is provided on the driving rod, and the rotating shaft and the bracket are rotatably arranged.

[0017] In some embodiments of the present application, an insulating frame is also included, which includes an inner sleeve, in which the moving iron core and the static iron core are both located, the solenoid is surrounded by the outer side of the inner sleeve, and a first return spring is also provided between the moving and static iron cores.

[0018] In some embodiments of the present application, the solenoid also surrounds the moving iron core.

[0019] In some embodiments of the present application, a shielding cover is further included, wherein the shielding cover forms a cavity, and the solenoid is disposed in the cavity.

[0020] In some embodiments of the present application, the insulating skeleton further includes an outer cover, a gap exists between the outer cover and the inner sleeve, the solenoid includes a spiral portion, and at least half of the spiral portion is covered by the outer cover.

[0021] In some embodiments of the present application, a wiring bracket is provided on the insulating skeleton near the solenoid, and the solenoid includes a spiral portion and an extended end portion, the spiral portion is used to surround the static iron core, and the extended end portion is used to be welded to the rest of the main circuit conductor assembly, and at least a portion of the extended end is arranged close to the wiring bracket.

[0022] In some embodiments of the present application, a wiring bracket is disposed on the insulating frame near the solenoid, and the main circuit conductor assembly includes an extended conductor welded to the solenoid, and at least a portion of the extended conductor is disposed close to the wiring bracket.

[0023] In some embodiments of the present application, the main circuit conductor assembly includes a moving contact, a bimetallic strip, a hard busbar and a terminal block. The terminal block is directly welded to one end of the solenoid or welded through a first soft conductive part. The other end of the solenoid is welded to the movable end of the bimetallic strip through a second soft conductive part. The fixed end of the bimetallic strip is fixed and conductively connected to the hard busbar. The moving contact is conductively connected to the fixed end of the bimetallic strip or the hard busbar through a conductive part.

[0024] In some embodiments of the present application, a welding conductive sheet is fixed on the movable end of the bimetallic strip, the other end of the solenoid is welded to one end of the second soft conductive part, the other end of the second soft conductive part is welded to the welding conductive sheet, and the welding conductive sheet is conductively connected to the bimetallic strip.

[0025] In some embodiments of the present application, a second return spring is further included, wherein the second return spring is connected to the driving rod and is used to drive the driving rod to return to its original position after being actuated.

[0026] As can be seen from the above, the technical solution of the present application utilizes a solenoid-type electromagnetic release to drive the driving rod to rotate, thereby causing the trip shaft of the operating mechanism to rotate, thereby achieving instantaneous protection. Such a structure can also provide stable instantaneous tripping protection in circuit breakers with smaller rated currents. At the same time, the movement direction of the actuating rod and the moving iron core of the present application is arranged parallel to the length direction of the base, which is conducive to the reasonable use of the space in the length direction of the base and minimizes the space occupied in the height direction of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A schematic diagram of the structure of a circuit breaker according to an embodiment of the present application is shown (without the cover and other components);

[0029] Figure 2 A schematic diagram showing a main circuit conductor assembly and an electromagnetic release in a circuit breaker according to an embodiment of the present application is shown;

[0030] Figure 3 A cross-sectional view of an implementation of an electromagnetic release in a circuit breaker according to an embodiment of the present application is shown;

[0031] Figure 4 A schematic diagram of an insulating frame and a solenoid in one implementation of an electromagnetic release in a circuit breaker according to an embodiment of the present application is shown;

[0032] Figure 5 A schematic diagram of a driving rod and an actuating rod in an implementation manner of an electromagnetic release in a circuit breaker according to an embodiment of the present application is shown;

[0033] Figure 6 A schematic diagram of a driving rod and a bracket in one implementation of an electromagnetic release device in a circuit breaker according to an embodiment of the present application is shown;

[0034] Figure 7 A schematic diagram showing another implementation of a main circuit conductor assembly in a circuit breaker according to an embodiment of the present application;

[0035] Figure 8 A schematic diagram showing a rotation mode of a driving rod in an electromagnetic release device in a circuit breaker in an embodiment of the present application;

[0036] Fig. 9 A schematic diagram showing another rotation mode of a driving rod in an electromagnetic release device in a circuit breaker according to an embodiment of the present application;

[0037] Fig.10 A schematic diagram showing another rotation mode of the driving rod in the electromagnetic release device in the circuit breaker of the embodiment of the present application;

[0038] Fig.11 A schematic diagram showing another rotation mode of the driving rod in the electromagnetic release device in the circuit breaker according to the embodiment of the present application;

[0039] Fig.12 A cross-sectional view of another implementation of an electromagnetic release in a circuit breaker according to an embodiment of the present application is shown;

[0040] Fig.13 A schematic diagram showing another implementation of a main circuit conductor assembly in a circuit breaker according to an embodiment of the present application;

[0041] Fig.14 A schematic diagram showing another implementation of a main circuit conductor assembly in a circuit breaker according to an embodiment of the present application;

[0042] Fig.15A schematic diagram of an implementation of an insulating frame and a solenoid in an electromagnetic release in a circuit breaker in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0043] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0044] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0046] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "electrically connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed electrical connection, a detachable electrical connection, or an integrated one; it can be a mechanical electrical connection, or an electrical electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature. Example

[0048] like Figure 1 As shown, the circuit breaker includes a base 100, a cover, an operating mechanism, a contact support, an arc extinguishing chamber and other components.

[0049] The base 100 has three pole spaces 100s arranged in sequence along its width direction. The pole spaces 100s here are used to install the main circuit conductor components 200 and the arc extinguishing structure. A group of main circuit conductor components 200 and an arc extinguishing structure are arranged inside each pole space 100s.

[0050] Here, the main circuit conductor assembly 200 is not a complete conductor, but is composed of multiple conductors, and the moving and static contacts are part of the main circuit conductor assembly 200. The contact and separation of the moving and static contacts enable the main circuit conductor assembly 200 to be in the on state and the off state.

[0051] The moving contact 201 is arranged on the rotating shaft, and the contact support is connected to the operating mechanism. Through the movement of the operating mechanism, the rotating shaft can be rotated to realize the connection and separation of the moving and static contacts. The structure of the operating mechanism itself and the method of driving the rotating shaft are conventional technologies in this field, and will not be repeated here. Here, the operating mechanism includes a trip shaft 300. When the main circuit conductor assembly 200 is in a passage state, the operating mechanism as a whole is maintained in a closed state (a temporary steady state). If the trip shaft 300 is triggered and rotated at this time, this temporary steady state of the operating mechanism will be broken, so that the operating mechanism performs a tripping operation, so that the main circuit conductor assembly 200 is in an open circuit state. There are many ways to trigger this trip shaft 300. Obviously, the drive of the electromagnetic release 400 is one of them.

[0052] The arc extinguishing structure is arranged near the contact position of the moving and static contacts, so that the arc generated when the moving and static contacts are separated can be extinguished. The arc extinguishing structure here also belongs to conventional technology and will not be described here.

[0053] like Figure 3-Figure 6As shown, the electromagnetic release 400 adopts a solenoid structure, including an insulating frame 401, a solenoid 402, a moving iron core 403, a static iron core 404, an actuating rod 405 and a driving rod 406.

[0054] The insulating frame 401 includes an inner sleeve 401a. The moving iron core 403 and the static iron core 404 are both in the inner sleeve 401a. A first return spring 407 is arranged between the moving and static iron cores 403 and 404. The first return spring 407 here is a compression spring.

[0055] The solenoid 402, as a part of the main circuit conductor assembly 200, is connected to the rest of the main circuit conductor assembly 200 by welding (the specific welding position will be introduced below). The solenoid 402 has a spiral portion 402a, where the spiral portion 402a at least surrounds the static iron core 404, so that when the current flowing through the main circuit conductor assembly 200 is large enough (when the main circuit conductor assembly 200 is circuit breaker), the attraction of the moving iron core 403 will be greater than the resistance of the first return spring 407, thereby prompting the moving iron core 403 to move toward the static iron core 404, which is the actuation of the electromagnetic release 400. Of course, in order to further increase the attraction between the moving and static iron cores 403, 404, the spiral portion 402a here can completely surround the moving iron core 403 and the static iron core 404, such as Figure 3 shown.

[0056] like Figure 3 As shown, the actuating rod 405, in this embodiment, the actuating rod 405 and the moving iron core 403 are an integrated part, so the two can move synchronously.

[0057] Of course, the actuating rod 405 and the moving iron core 403 can also be separate parts, belonging to two parts, and the two are just fixed to achieve synchronous movement, such as Fig.12 As shown. Of course, there are many ways of fixing here, such as interference fit, screw fastening, or riveting fixation, which can achieve a stable fit between the two. Here, the material of the split actuating rod 405 can also be selected in many ways, as long as it can form a stable shape, such as engineering plastics, or the same material as the moving iron core 403.

[0058] The hitting rod 406 is rotatably arranged relative to the base 100. The rotatably arranged relative to the base 100 mentioned here does not specifically mean that the hitting rod 406 is directly rotatably arranged with the base 100. Such rotatably arranged relative to the base 100 includes both being directly rotatably arranged with the base 100 and being rotatably arranged with the base 100 through other components.

[0059] like Figure 8As shown in FIG. 1 , as one of the rotational settings of the hitting rod 406, in this mode, the hitting rod 406 is directly rotatably set with the base 100, that is, two oppositely arranged rotation slots 101 are opened on the base 100, and the rotation shaft 102 passes through the two ends of the hitting rod 406 and extends into the corresponding rotation slots 101 respectively, so that the hitting rod 406 can be directly rotatably connected with the base 100 with the rotation shaft 102 as the rotation center. Of course, this embodiment also has a modified embodiment, for example, the rotation shaft 102 is directly replaced by the rotation shaft portion 102a on the hitting rod 406, such as Fig. 9 shown.

[0060] like Figure 6 , Fig.10 As shown, as one of the rotational settings of the hitting rod 406, in this mode, the hitting rod 406 is indirectly rotationally set with the base 100. In this mode, there is a bracket 408, and the bracket 408 is fixed to the base 100, and the fixing method here can be screw fastening. The bracket 408 includes two bracket arms 408a, and the bracket arms 408a are provided with rotation holes 4080. The rotating shaft 102 passes through the two ends of the hitting rod 406 and extends into the corresponding rotation holes 4080 respectively. In this way, the hitting rod 406 can be indirectly rotationally connected with the base 100 with the rotating shaft 102 as the rotation center. Of course, there are also many variations of this embodiment. One of the variations is that the rotating shaft 102 is directly replaced by the rotating shaft portion 102a on the hitting rod 406. Fig.11 Another deformation mode is that the rotation hole 4080 is replaced by the rotation groove 101, and the rotation shaft 102 is located in the rotation groove 101 to form a rotation connection, as shown in FIG. Fig.10 As shown. Of course, as another variation, the shaft 102 can also be replaced by the shaft portion 102a, and the rotation hole 4080 can be replaced by the rotation slot 101. Of course, in this case, the cross section of the shaft portion 102a is not limited to a circle, it can be any shape, as long as it can be against the rotation slot 101 to form a rotation connection. As for the fixation of the bracket 408, there is also a variation, that is, the bracket 408 is not directly fixed to the base 100, the bracket 408 can be fixed to the base 100 through the hard busbar 202, there are many such fixing methods, such as welding, riveting, bolting, etc. Here, the hard busbar 202 is also a part of the main circuit conductor assembly 200.

[0061] Regardless of the above-mentioned rotation mode of the hitting rod 406, as long as it can ensure that it can be rotated. Figure 3-Figure 6 As shown, the hitting rod 406 includes two ends, namely a first end 406a and a second end 406b.

[0062] Here, the first end 406a extends to the side of the trip shaft 300 and cooperates with the trip shaft 300. The cooperation here includes both the situation that the two maintain real-time contact and the situation that there is a driving and driven relationship between the two at a certain time (obviously the certain time here refers to when the electromagnetic release 400 is actuated).

[0063] Here, the second end 406b extends to the side of the actuating rod 405 and cooperates with the actuating rod 405. The cooperation here includes both the situation that the two maintain real-time contact, and the situation that there is a driving and driven relationship between the two at a certain time (obviously the certain time here refers to when the electromagnetic release 400 is actuated).

[0064] With such an arrangement, when the electromagnetic release 400 is actuated (when a short circuit occurs in the main circuit), the moving iron core 403 drives the actuating rod 405 to move synchronously, and the actuating rod 405 causes the hitting rod 406 to rotate, thereby causing the tripping shaft 300 to rotate, completing the tripping action of the circuit breaker.

[0065] like Figure 3 As shown, here, in order to achieve the reset of the hitting rod 406, a second reset spring 409 is connected to the hitting rod 406. The second reset spring 409 here is a tension spring. Of course, in addition to the tension spring, other springs can also be used to achieve reset. One end of the second reset spring 409 is connected to the hitting rod 406, and the other end is connected to the bracket 408. In addition to being connected to the bracket 408, it can also be connected to other components statically arranged relative to the base 100, which can ensure that the hitting rod 406 can be reset after actuation.

[0066] Of course, the electromagnetic release 400 here includes two forms according to the different settings of the dynamic and static iron cores 403 and 404.

[0067] The first form, such as Figure 3-Figure 6 As shown, the static iron core 404 is arranged on the right side of the moving iron core 403. When the moving iron core 403 is actuated, the moving iron core 403 moves toward the static iron core 404. At this time, the movement direction of the actuating rod 405 is toward the direction of the solenoid 402. In this way, the end of the actuating rod 405 away from the solenoid 402 is the driving end 4050, and the second end 406b of the hitting rod 406 is provided with a avoidance opening 4060. A part of the actuating rod 405 is located in the avoidance opening 4060, that is, the second end 406b of the hitting rod 406 is located between the driving end 4050 and the solenoid 402. Since the size of the driving end 4050 is larger than the size of the avoidance opening 4060, when the electromagnetic release 400 is actuated, the actuating rod 405 moves toward the direction of the solenoid 402, pulling the hitting rod 406 to rotate counterclockwise, and the hitting rod 406 pushes the tripping shaft 300 to rotate.

[0068] The second form, such as Fig.12 As shown, the moving iron core 403 is arranged on the right side of the static iron core 404, and the actuating rod 405 penetrates the static iron core 404 to the outside of the solenoid 402. When the moving iron core 403 is actuated, the moving iron core 403 moves toward the static iron core 404, and the movement direction of the actuating rod 405 is in the direction away from the solenoid 402. In this way, the end of the actuating rod 405 away from the solenoid 402 is the driving end 4050, and the second end 406b of the hitting rod 406 is located on the side of the driving end 4050 away from the solenoid 402. When the electromagnetic release 400 is actuated, the actuating rod 405 moves in the direction away from the solenoid 402, pushing the hitting rod 406 to rotate clockwise, and the hitting rod 406 drives the tripping shaft 300 to rotate.

[0069] Regardless of the above-mentioned method, the movement directions of the moving iron core 403 and the actuating rod 405 are both parallel to the length direction of the base 100 .

[0070] The main circuit conductor assembly 200 is divided into the following two types according to whether it includes a bimetallic strip 205 or not. The commonality of these two types is that they both include a static contact, a moving contact 201 , a terminal block 203 , and a solenoid 402 .

[0071] like Figure 2 , Figure 7 As shown, as a main loop conductor assembly 200 including a bimetallic strip 205 , it also includes a hard busbar 202 .

[0072] The terminal block 203 and one end of the solenoid 402 are welded through the first soft conductive member 204. There are many options for the first soft conductive member 204, such as a soft connection, a soft braided wire, and a soft wire. Of course, the terminal block 203 and the solenoid 402 can also be directly welded together. However, if the first soft conductive member 204 is used, the bending of the solenoid 402 can be reduced.

[0073] The other end of the solenoid 402 is welded to the active end of the bimetallic strip 205 through the second soft conductive member 206. There are many options for the second soft conductive member 206, such as a soft link, a soft braided wire, and a soft wire. Moreover, in order to facilitate welding of the second soft conductive member 206 to the active end of the bimetallic strip 205, such as Figure 7 As shown, a welding conductive sheet 207 can also be fixed on the movable end of the bimetallic strip 205 (the fixation here can be riveted fixation or screwed fastening), the other end of the solenoid 402 is welded to one end of the second soft conductive part 206, and the other end of the second soft conductive part 206 is welded to the welding conductive sheet 207, and the welding conductive sheet 207 and the bimetallic strip 205 are conductively connected by contact.

[0074] The fixed end of the bimetallic strip 205 is fixed to the hard busbar 202 and is conductively connected. The conductive connection is also achieved because the fixed end of the bimetallic strip 205 is in contact with the hard busbar 202. The fixed end of the bimetallic strip 205 and the hard busbar 202 can be fixed by screws, riveted, or interference fit.

[0075] One end of the moving contact 201 is conductively connected to the hard busbar 202 through a conductive member 208. The conductive member 208 here can be a soft conductive member 208 such as a soft link, a soft braided wire, or a soft wire, or a hard conductor. If a hard conductor structure is used, the hard conductor and the moving contact 201 can rotate relative to each other, and the moving contact 201 is always connected to the hard conductor during the rotation. Of course, the moving contact 201 here can also be directly conductively connected to the fixed end of the bimetallic strip 205 through the conductive member 208.

[0076] like Fig.13 , Fig.14 As shown, a main loop conductor assembly 200 does not include a bimetallic strip 205 .

[0077] The terminal block 203 and one end of the solenoid 402 are welded through the first soft conductive member 204. There are many options for the first soft conductive member 204, such as a soft connection, a soft braided wire, and a soft wire. Of course, the terminal block 203 and the solenoid 402 can also be directly welded together. However, if the first soft conductive member 204 is used, the bending of the solenoid 402 can be reduced.

[0078] The other end of the solenoid 402 is electrically connected to the moving contact 201. There are many ways of electrical connection, for example Fig.13 As shown, the two are directly connected via a soft link 209. Fig.14 As shown, there is also a hard busbar 202, and the other end of the solenoid 402 is welded to the hard busbar 202 through a second soft conductive part 206; and one end of the moving contact 201 is conductively connected to the hard busbar 202 through a conductive part 208. The conductive part 208 here can be a soft conductive part 208 such as a soft link, a soft braided wire, and a soft wire, or a hard conductor. If a hard conductor structure is adopted, the hard conductor and the moving contact 201 can rotate relative to each other, and the moving contact 201 is always connected to the hard conductor during the rotation process.

[0079] Regardless of which type of electromagnetic release 400 is used, Figure 3 , Figure 4As shown, its insulating frame 401 also has an outer cover 401b, and there is a gap between the outer cover 401b and the inner sleeve 401a. The function of the outer cover 401b here is to cover the solenoid 402, specifically, to cover at least 1 / 2 of the spiral portion 402a of the solenoid 402. In this embodiment, 3 / 4 of the spiral portion 402a is covered, that is, from the cross section of the spiral portion 402a, the outer cover 401b covers 3 / 4 of the circle. Through such covering, it can be ensured that the solenoid 402 will not be twisted and deformed due to large current.

[0080] A wiring support 4010 is provided near the spiral portion 402a of the insulating frame 401. In this embodiment, Figure 4 As shown, there are two wiring brackets 4010, which correspond to the two wiring terminals of the solenoid 402 respectively, and the wiring bracket 4010 is integrated with the outer cover 401b. In this embodiment, the solenoid 402 includes a spiral portion 402a and two extended end portions 402b, and the two extended end portions 402b are the two wiring terminals of the solenoid 402. The extended end portions 402b are at least partially attached to the wiring bracket 4010. The extended end portions 402b here are the solenoid 402 used to weld with the rest of the main circuit conductor assembly 200. The specific welding method here can be referred to the description in the above paragraph, which will not be repeated here. Of course, as a modified embodiment, such as Fig.15 As shown, the solenoid 402 only has a spiral portion 402a and does not have an extended end portion 402b. In this way, the remaining portion of the main circuit conductor assembly 200 is welded to the solenoid 402 through an extended conductor 4000. The extended conductor 4000 here can be softly connected, and the extended conductor 4000 here is at least partially arranged close to the wiring bracket 4010. Such a design of the wiring bracket 4010 will help protect the welding portion of the solenoid 402 and the main circuit conductor assembly 200, and prevent this portion from bending due to the electromotive repulsion (electromotive repulsion during disconnection).

[0081] Although the above example is a thermal magnetic molded case circuit breaker, it can also be applied to an electronic molded case circuit breaker. When applied to an electronic molded case circuit breaker, the above structure can be completely borrowed, or the above structure can be changed (for example, the bimetallic strip is removed, and one end of the solenoid 402 is directly welded to the hard busbar 202 or welded through a soft wire). The electromagnetic release 400 is introduced in detail:

[0082] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without contradiction.

[0083] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A circuit breaker, comprising a base and an operating mechanism, wherein the base is provided with at least two pole spaces arranged side by side along the width direction of the base, and each pole space is provided with a main circuit conductor assembly; characterized in that: An electromagnetic release is arranged in each pole space; the electromagnetic release comprises a solenoid, a moving iron core, a stationary iron core, an actuating rod and a hitting rod; the solenoid is a part of the main circuit conductor assembly, the solenoid is arranged at least around the stationary iron core, and the actuating rod is located outside the solenoid; the stationary iron core is arranged on one side of the moving iron core, the actuating rod and the moving iron core are arranged for synchronous movement, and the movement direction of the moving iron core is arranged parallel to the length direction of the base; the hitting rod is arranged to rotate relative to the base, the first end of the hitting rod extends to the side of the tripping shaft of the operating mechanism for cooperation with the tripping shaft, and the second end of the hitting rod extends to the side of the actuating rod for cooperation with the actuating rod; when the electromagnetic release is actuated, the moving iron core drives the actuating rod to move synchronously, and the actuating rod prompts the hitting rod to rotate, thereby causing the tripping shaft to rotate.

2. A circuit breaker according to claim 1, characterized in that: The end of the actuating rod away from the solenoid is the driving end, and the second end of the hitting rod is located on the side of the driving end away from the solenoid. When the electromagnetic release is actuated, the actuating rod moves in a direction away from the solenoid, pushing the hitting rod to rotate; Or, the end of the actuating rod away from the solenoid is the driving end, and the second end of the hitting rod is located between the driving end and the solenoid. When the electromagnetic release is actuated, the actuating rod moves in the direction of the solenoid, pulling the hitting rod to rotate.

3. A circuit breaker according to claim 1, characterized in that: The hitting rod is provided with a rotating shaft, and the base is provided with a rotating groove, and the hitting rod is rotatably connected with the rotating groove through the rotating shaft; Alternatively, the hitting rod is provided with a rotating shaft portion, and the base is provided with a rotating groove, and the hitting rod is rotatably connected with the rotating groove through the rotating shaft portion.

4. A circuit breaker according to claim 1, characterized in that: It also includes a bracket, the bracket is fixed to the base, a rotating shaft is passed through the driving rod, and the rotating shaft and the bracket are rotatably arranged; Or, it further comprises a bracket, the bracket is fixed to the base, a rotating shaft is provided on the driving rod, and the rotating shaft is rotatably arranged with the bracket; Or, it also includes a bracket, the main circuit conductor assembly includes a hard busbar, the bracket is fixed to the hard busbar, a rotating shaft is passed through the rod, and the rotating shaft and the bracket are rotatably arranged; Or, it also includes a bracket, the main circuit conductor assembly includes a hard busbar, the bracket is fixed to the hard busbar, and a rotating shaft is provided on the driving rod, and the rotating shaft and the bracket are rotatably arranged.

5. A circuit breaker according to claim 1, characterized in that: It also includes an insulating frame, which includes an inner sleeve, in which the moving iron core and the static iron core are both located, the solenoid surrounds the outer side of the inner sleeve, and a first return spring is arranged between the moving and static iron cores; And / or, the solenoid also surrounds the moving iron core; And / or, it further includes a shielding cover, the shielding cover forms a cavity, and the solenoid is arranged in the cavity.

6. A circuit breaker according to claim 5, characterized in that: The insulating frame also includes an outer cover, and there is a gap between the outer cover and the inner sleeve. The solenoid includes a spiral part, and at least half of the spiral part is covered by the outer cover.

7. A circuit breaker according to claim 5, characterized in that: The insulating frame is provided with a wiring bracket near the solenoid, the solenoid comprises a spiral portion and an extended end portion, the spiral portion is used to surround the static iron core, the extended end portion is used to be welded with the rest of the main circuit conductor assembly, and at least a portion of the extended end is arranged close to the wiring bracket; Alternatively, the insulating frame is provided with a wiring bracket near the solenoid, the main circuit conductor assembly includes an extension conductor welded to the solenoid, and at least a portion of the extension conductor is provided close to the wiring bracket.

8. A circuit breaker according to claim 1, characterized in that: The main circuit conductor assembly includes a moving contact, a bimetallic strip, a hard busbar and a terminal block. The terminal block is directly welded to one end of the solenoid or welded through a first soft conductive part. The other end of the solenoid is welded to the movable end of the bimetallic strip through a second soft conductive part. The fixed end of the bimetallic strip is fixed to the hard busbar and is conductively connected. The moving contact is conductively connected to the fixed end of the bimetallic strip or the hard busbar through a conductive part.

9. A circuit breaker according to claim 8, characterized in that: A welding conductive sheet is fixed on the movable end of the bimetallic strip, the other end of the solenoid is welded to one end of the second soft conductive member, the other end of the second soft conductive member is welded to the welding conductive sheet, and the welding conductive sheet is conductively connected to the bimetallic strip.

10. A circuit breaker according to claim 1, characterized in that: It also includes a second return spring, which is connected to the driving rod and is used to drive the driving rod to return to its original position after being actuated.

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