A plug-in circuit breaker

Abstract

The application discloses an insertion type circuit breaker, which comprises at least two parallel circuit breaker poles, each of which is provided with a linkage mechanism and an operating mechanism connected with the linkage mechanism, and an electric operation transmission mechanism extending into the two circuit breaker poles respectively, the linkage mechanisms of the two circuit breaker poles are linked through a linkage shaft, the electric operation transmission mechanism cooperates with the linkage mechanism of one of the circuit breaker poles to drive the circuit breaker pole to automatically open and close, and the linkage mechanism of the circuit breaker pole drives the remaining circuit breaker poles to automatically open and close through the linkage shaft. The electric operation transmission mechanism in the driving module is connected between two adjacent circuit breaker poles, the driving module directly drives one circuit breaker pole, the remaining circuit breaker poles are driven by the linkage mechanism, a plurality of circuit breaker poles share one electric operation transmission mechanism, and the driving module is not arranged in the interior of one circuit breaker pole, so that the interior space of the circuit breaker pole is saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of low-voltage electrical apparatus, in particular to an insert-type circuit breaker. BACKGROUND

[0002] With the rapid development of the communication industry, the trend of intelligentization and miniaturization of circuit breakers is increasingly obvious, and the system has higher requirements for the size and function of the circuit breaker. The internal layout of the existing insert-type circuit breaker with remote control function is to place the drive module inside for signal transmission and mechanism motion control. Such layout not only occupies space, but also is not conducive to mechanism motion control, so that the circuit breaker cannot meet the requirements of intelligentization and miniaturization at the same time. SUMMARY

[0003] The present application aims to overcome the defects of the prior art and provide an insert-type circuit breaker with simple structure, high reliability, small space occupation and good assembly.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0005] An insert-type circuit breaker comprises at least two parallel circuit breaker poles, each of which is provided with a linkage mechanism and an operating mechanism connected with the linkage mechanism, and further comprises an electric operation transmission mechanism extending into the two circuit breaker poles at both ends, the linkage mechanisms of the two circuit breaker poles are linked through a linkage shaft, the electric operation transmission mechanism cooperates with the linkage mechanism of one of the circuit breaker poles to drive the circuit breaker pole to automatically open and close, and the linkage mechanism of the circuit breaker pole drives the remaining circuit breaker poles to automatically open and close through the linkage shaft.

[0006] Further, a reserved space is provided on one side of the linkage mechanisms of the two circuit breaker poles, the reserved spaces of the two circuit breaker poles are kept facing each other, and the two ends of the electric operation transmission mechanism extend into the two reserved spaces respectively.

[0007] Further, the two ends of the electric operation transmission mechanism extend into the two circuit breaker poles in the direction of the thickness of the two circuit breaker poles.

[0008] Further, the electric operation transmission mechanism comprises a motor and a gear set, the output end of the motor is meshed and connected with the gear set, the gear set extends into one of the circuit breaker poles and is connected with the linkage mechanism in the circuit breaker pole, and the other end of the motor extends into the other circuit breaker pole.

[0009] Further, a partition plate and a circuit board are further included, the partition plate is arranged between the two circuit breaker poles, and the circuit board is connected with the electric operation transmission mechanism and assembled on the partition plate.

[0010] Further, a first mounting slot for mounting the circuit board and a second mounting slot for mounting the electric operating transmission mechanism are arranged on the same side of the partition plate, the second mounting slot is recessed more than the first mounting slot, and the bottom of the second mounting slot protrudes towards the other side of the partition plate.

[0011] Further, the circuit board is arranged along the bottom of the first mounting slot, the electric operating transmission mechanism comprises a motor and a gear set, the motor is arranged in the second mounting slot and extends into one of the breaker poles through the second mounting slot, the output end of the motor is drivingly connected with the gear set, and the gear set extends into the other breaker pole.

[0012] Further, one end of each breaker pole is provided with a line inlet socket as a line inlet end, a line inlet terminal is arranged in the line inlet socket, the other end of the breaker pole is provided with a line outlet and a button hole as a line outlet end, a line outlet terminal and a button mechanism are arranged in the line outlet and the button hole respectively, a linkage mechanism is arranged between the operating mechanism and the button mechanism, and the button mechanism manually operates the operating mechanism through the linkage mechanism.

[0013] Further, the linkage mechanism comprises a linkage member, the linkage member is rotatably arranged in the breaker pole, the linkage member is connected with the button mechanism through a first connecting rod and connected with the operating mechanism through a second connecting rod, a gear is arranged on the linkage member, and the linkage member is linked with the linkage members in the other breaker poles through a linkage shaft.

[0014] Further, a contact mechanism, an arc extinguishing chamber, a short-circuit protection mechanism and an overload protection mechanism are further arranged between the operating mechanism and the line inlet terminal of each breaker pole, a moving contact of the contact mechanism is connected with the operating mechanism, a stationary contact of the contact mechanism is fixedly arranged and opposite to the moving contact.

[0015] The operating mechanism comprises a contact support, a trip lever and a lock lever, the contact support is rotatably arranged on the first base, the trip lever and the lock lever are rotatably arranged on the contact support, the trip lever is snap-connected with the lock lever, and the trip lever is connected with the second connecting rod.

[0016] The button mechanism of the at least two breaker poles is linked through a handle linkage member at the end of the button hole, and the lock lever of the operating mechanism of the at least two breaker poles is linked through a lock lever linkage member.

[0017] The plug-in circuit breaker connects the electric operating transmission mechanism in the driving module between two adjacent breaker poles, the driving module directly drives one breaker pole, the remaining breaker poles are driven by the linkage mechanism, a plurality of breaker poles share one electric operating transmission mechanism, the driving module is not arranged in the interior of one breaker pole, and the interior space of the breaker pole is saved.

[0018] In addition, by optimizing the space structure inside the breaker pole, a clearance space is reserved inside the breaker pole, the main assembly space of the electric operation transmission mechanism is provided by the clearance space, especially when the clearance spaces of two breaker poles are opposite, the electric operation transmission mechanism can be vertically connected in the two breaker poles, which is beneficial to reduce the overall thickness and improve the transmission efficiency.

[0019] In addition, two adjacent breaker poles are separated by a partition plate, and the partition plate also provides an assembly position for the electric operation transmission mechanism and the circuit board, which is beneficial to the assembly of the circuit breaker. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic view of an insertion type circuit breaker of the present application;

[0021] Figure 2 is a schematic view of an insertion type circuit breaker of the present application;

[0022] Figure 3 is a schematic view of an insertion type circuit breaker of the present application;

[0023] Figure 4 is a schematic view of an insertion type circuit breaker of the present application;

[0024] Figure 5 is a schematic view of a first base in an insertion type circuit breaker of the present application;

[0025] Figure 6 is a schematic view of the internal structure of a breaker pole in an insertion type circuit breaker of the present application;

[0026] Figure 7 is a front view of Figure 6

[0027] Figure 8 is a connection schematic view of a current transformer in an insertion type circuit breaker of the present application;

[0028] Figures 9-10 is a schematic view of the structure of a partition plate in an insertion type circuit breaker of the present application;

[0029] Figure 11 is an enlarged schematic view (front view) of D part in Figure 10

[0030] is an enlarged schematic view (side view) of D part in Figure 12 Figure 10 DETAILED DESCRIPTION

[0031] The following will be described in detail in combination with the accompanying drawings: Figures 1 to 12 ​​​The embodiments are further to illustrate a specific implementation of the plug-in circuit breaker of the present application. The plug-in circuit breaker of the present application is not limited to the description of the following embodiments.

[0032] As shown in Figure 1 , 6 A plug-in circuit breaker comprises at least two parallel circuit poles, each of which has a line-in end and a line-out end, a line-in port is arranged at the line-in end, a line-out port 51 and a button hole are arranged at the line-out end, a line-in terminal 481 is arranged in the line-in port, a line-out terminal 482 and a button mechanism 41 are arranged in the line-out port 51 and the button hole respectively, a linkage mechanism 42, an operating mechanism 43 and a contact mechanism are arranged in each circuit pole and linked with the button mechanism 41, and the opening and closing of the circuit pole is realized by pressing or pulling the button mechanism 41. Preferably, an overcurrent protection mechanism is arranged in at least one circuit pole, the overcurrent protection mechanism comprises a short-circuit protection mechanism 44 and / or an overload protection mechanism 47, and the circuit breaker is tripped to provide protection when a short-circuit fault or an overload fault occurs in the circuit.

[0033] An improved point of the present application is that the linkage mechanisms 42 of the adjacent two circuit poles are linked through a linkage shaft, and when one of the circuit poles is opened or closed, the remaining circuit poles are driven to be opened or closed synchronously under the driving of the linkage mechanism 42, so that all the circuit poles are opened or closed synchronously.

[0034] Another improved point of the present application is that the circuit breaker further comprises an electric operating transmission mechanism 33, as shown in Figures 1-7 The two ends of the electric operating transmission mechanism 33 extend into the two circuit poles respectively, the electric operating transmission mechanism 33 cooperates with the linkage mechanism 42 of one of the circuit poles to drive the circuit pole to be opened or closed automatically, and the linkage mechanism 42 of the circuit pole drives the remaining circuit poles to be opened or closed automatically through the linkage shaft. The automatic opening and closing of the circuit pole is directly driven by the electric operating transmission mechanism 33, and the automatic opening and closing of the remaining circuit poles is realized under the linkage of the linkage mechanism 42. By connecting the electric operating transmission mechanism in the driving module between the two adjacent circuit poles, the driving module directly drives one circuit pole, and the remaining circuit poles are driven by the linkage mechanism, so that the electric operating transmission mechanism is shared by multiple circuit poles, avoiding the arrangement of the driving module in the interior of one circuit pole, and saving the interior space of the circuit pole. Of course, as a variant, the electric operating transmission mechanism 33 for driving the circuit pole to be opened or closed automatically can also be arranged in one circuit pole, and of course, the thickness of the circuit pole will be increased.

[0035] An assembly embodiment of the electric operating drive mechanism 33 is shown in Fig. 2, in which the electric operating drive mechanism 33 is directly assembled in the clearance space 53 of two circuit breaker poles. Preferably, the clearance space 53 is reserved in at least one of the two adjacent circuit breaker poles by increasing the length of the circuit breaker pole or changing the internal layout of the circuit breaker pole on the basis of maintaining the existing thickness of the circuit breaker pole, the electric operating drive mechanism 33 is connected through the clearance space 53, the internal space of the adjacent circuit breaker pole is extended to reduce the overall thickness of the circuit breaker, which is conducive to the miniaturization design of the circuit breaker, and the thickness and volume of the circuit breaker can be minimized when the clearance space 53 is provided in both of the circuit breaker poles. Of course, the linkage mechanism 42 of the electric operating drive mechanism 33 is connected outside the circuit breaker pole, and the automatic opening and closing drive can also be realized, but the overall volume of the circuit breaker is relatively large.

[0036] Another improvement of the present application is that the circuit breaker comprises a drive module 3 provided with the electric operating drive mechanism 33, the drive module 3 comprises a partition plate 31 and the electric operating drive mechanism 33 arranged on the partition plate 31, and the circuit breaker poles each comprise a housing, the partition plate 31 is assembled between the housings of the two circuit breaker poles, so that the drive module 3 is assembled between the two circuit breaker poles, and the two ends of the electric operating drive mechanism 33 extend into the housings of the two circuit breaker poles. All the circuit breaker poles and the drive module 3 comprise housings, and the circuit breaker poles and the drive module 3 can be independently assembled in the respective housings and then assembled through the respective housings after the assembly is completed, which has the advantages of independent assembly and convenient assembly, so that the user can select the assembly according to the actual situation, and the applicability is stronger.

[0037] As shown in Fig. 1, Figures 2-7 The drive module 3 of the present embodiment comprises a partition plate 31 for separating two circuit breaker poles, a circuit board 32 and an electric operating drive mechanism 33 connected with the circuit board 32 are arranged on the partition plate 31, the circuit board 32 is located between the two adjacent circuit breaker poles, and the two ends of the electric operating drive mechanism 33 extend into the two adjacent circuit breaker poles. Preferably, the clearance space 53 is reserved on one side of the linkage mechanism 42 of each circuit breaker pole, the clearance spaces 53 of the two circuit breaker poles are kept facing each other, and the two ends of the electric operating drive mechanism 33 extend into the two clearance spaces 53. In the present embodiment, the electric operating drive mechanism 33 is vertically connected through the thickness direction of the two circuit breaker poles, one end of the electric operating drive mechanism 33 extends into the clearance space 53 of one circuit breaker pole to cooperate with the linkage mechanism 42, and the other end of the electric operating drive mechanism 33 only extends into the clearance space 53 of the other circuit breaker pole.

[0038] Preferably, the line board 32 is connected with the current sampling device of the circuit breaker, and a microcontroller is arranged on the line board 32, which is used to receive and process the signal fed back by the current sampling device. Preferably, the current sampling device is a current transformer 45, which is connected with the line board 32 to feed back the current signal of each circuit breaker pole.

[0039] An assembly embodiment of the circuit breaker pole and the drive module is not shown in the figure. The housing of the circuit breaker pole and the housing of the drive module 3 both include a base and an upper cover 11 covering the base. An avoiding space 53 is reserved in the housing of each circuit breaker pole, and the avoiding spaces 53 of two adjacent circuit breaker poles are opposite. Avoiding holes 121 are arranged on the side walls of the housing of the two circuit breaker poles and the housing of the drive module 3, so that the electric operation driving mechanism 33 of the drive module 3 extends into the two adjacent circuit breaker poles through the avoiding holes 121 when assembled.

[0040] Further, referring to the embodiment shown in Figures 1-7 The upper cover of the drive module 3 and the upper cover 11 of one circuit breaker pole can be omitted at the same time, or the base of the drive module 3 and the base of the other circuit breaker pole can be omitted. After the upper cover or the base is omitted, the housing of the drive module 3 only includes a partition plate 31, and only the avoiding holes 121 need to be arranged on the side wall of the housing of one circuit breaker pole. This not only reduces the thickness of the circuit breaker as a whole, but also makes the assembly more convenient.

[0041] Referring to the preferred embodiment of Figures 1-12 This embodiment takes a two-pole circuit breaker as an example. The first circuit breaker pole 1 is a driven circuit breaker pole, and the second circuit breaker pole 2 is a driven circuit breaker pole.

[0042] As Figures 1-5As shown, the circuit breaker includes a first circuit breaker pole 1, a second circuit breaker pole 2, and a drive module 3 arranged in parallel. The first circuit breaker pole 1, the second circuit breaker pole 2, and the drive module 3 are assembled together through their respective housings. The drive module 3 is located between the first circuit breaker pole 1 and the second circuit breaker pole 2. The first circuit breaker pole 1 includes a first housing, which includes a first base 12 and a top cover 11 covering the first base 12. The second circuit breaker pole 2 includes a second base 21. The drive module 3 includes a partition 31. The first base 12 covers the partition 31 and has a clearance hole 121 communicating with the partition 31 on the first base 12. The partition 31 covers the second base 21 and has a groove structure extending into the second base 21, so that the electric operating transmission mechanism 33 of the drive module 3 extends into the clearance space 53 between the first circuit breaker pole 1 and the second circuit breaker pole 2 through the clearance hole 121 and the groove structure, realizing the connection of the electric operating transmission mechanism 33.

[0043] like Figures 6-8 As shown, the first outer shell and the second base 21 are respectively designated as the inlet and outlet ends. The inlet end is equipped with an inlet terminal 481 and has an inlet port corresponding to the inlet terminal 481. The outlet end is equipped with an outlet terminal 482 and has an outlet port 51 corresponding to the outlet terminal 482. In this embodiment, the inlet port is an inlet plug 52, and the inlet terminal 481 is a busbar clamp disposed within the inlet plug 52. One end of the busbar clamp serves as a clamping end for plugging and unplugging with external wires, and the other end serves as a connecting end for electrical connection. The other end of the first outer shell and the second base 21 is provided with an outlet port 51 and a button hole. An outlet terminal 482 and a button mechanism 41 are respectively installed in the outlet port 51 and the button hole. The button mechanism 41 is slidably mounted within the button hole, with one end located outside the button hole and the other end extending inside the first outer shell and the second base 21.

[0044] The second circuit breaker pole 2 of the embodiment is the same as the first circuit breaker pole 1, that is, the layout positions in the first base 12 and the second base 21 are the same, and the first circuit breaker pole 1 is described below. The linkage mechanism 42 and the operating mechanism 43 are arranged between the button mechanism 41 and the incoming terminal 481 in the first base 12, wherein the operating mechanism 43 is arranged in the middle of the first base 12, the linkage mechanism 42 is located between the operating mechanism 43 and the button mechanism 41, the button mechanism 41 is connected with the operating mechanism 43 through the linkage mechanism 42, and the button mechanism 41 is used for manually operating the opening and closing of the circuit breaker pole. A reserved space 53 is provided on one side of the linkage mechanism 42, the button mechanism 41 and the outgoing terminal 482, that is, the space surrounded by the linkage mechanism 42, the button mechanism 41 and the outgoing terminal 482 is the reserved space 53, the first base 12 opposite to the reserved space 53 is provided with a reserved hole 121, one end of the electric operation driving mechanism 33 passes through the reserved hole 121 and cooperates with the linkage mechanism 42, so that the first circuit breaker pole 1 is directly driven by the electric operation driving mechanism 33 to automatically open and close, the reserved space 53 is arranged side by side with the button mechanism 41, the reserved space 53 is arranged on one side of the button mechanism 41, so that the reserved space 53 is away from the area of the core components of the circuit breaker pole, and the movement of the electric operation driving mechanism 33 avoids interference with other components in the circuit breaker pole.

[0045] The contact mechanism includes a movable contact and a static contact which are matched with each other, the movable contact is connected to the operating mechanism 43, and the static contact is fixed in the first base 12 and opposite to the movable contact. The overcurrent protection mechanism includes a short-circuit protection mechanism 44 and an overload protection mechanism 47. The arc extinguishing chamber 46 and the short-circuit protection mechanism 44 are arranged side by side between the operating mechanism 43 and the line terminal 481. An arc plate extending into the arc extinguishing chamber 46 is arranged between the arc extinguishing chamber 46 and the contact mechanism. One end of the short-circuit protection mechanism 44 is opposite to the operating mechanism 43. When a short-circuit fault occurs, the one end of the short-circuit protection mechanism 44 triggers the operating mechanism 43 to trip. The current transformer 45 is arranged between the line terminal 481 and the other end of the short-circuit protection mechanism 44. The conductive part 49 between the short-circuit protection mechanism 44 and the line terminal 481 passes through the current transformer 45. The current transformer 45 is in communication connection with the circuit board 32 in the drive module 3, and is used to feed back a current signal to the drive module 3. By arranging the current transformer for collecting the current signal between the short-circuit protection mechanism and the line terminal, the current transformer is prevented from being affected by other components, and the collection accuracy is improved. The overload protection mechanism 47 is arranged side by side with the operating mechanism 43. The button mechanism 41, the operating mechanism 42, the short-circuit protection mechanism 44 and the current transformer 45 are arranged along one side of the circuit breaker pole, i.e. along one side in the first base 12. The overload protection mechanism 47 is arranged on the other side in the first base 12 and corresponds to the position of the operating mechanism 43. The utilization rate of the internal space of the circuit breaker pole is improved, which is beneficial to the miniaturization design of the circuit breaker. Moreover, the current transformer is arranged between the short-circuit protection mechanism and the line terminal and is away from other components.

[0046] It should be noted that the short-circuit protection mechanism 44 can also be replaced with the overload protection mechanism 47 (not shown), i.e. the overload protection mechanism 47 is arranged on the same side as the line terminal 481, and the current transformer 45 is arranged between the overload protection mechanism 47 and the line terminal 481. The arc extinguishing chamber 46 and the overload protection mechanism 47 are arranged side by side between the line terminal 481 and the operating mechanism 43, and the short-circuit protection mechanism 47 is arranged side by side with the operating mechanism 43. Or, the overload protection mechanism 47 and the short-circuit protection mechanism 44 are both arranged on the same side (not shown), preferably on the same side as the line terminal 481. At this time, the current transformer 45 can be arranged between the short-circuit protection mechanism 47 and the line terminal 481, or between the overload protection mechanism 47 and the line terminal 481.

[0047] The button mechanism 41 comprises a button and a connecting piece, one end of the button extends out of the button hole, the other end of the button is connected with the linkage mechanism 42 through the connecting piece, the button of each breaker pole is connected together through the handle linkage at the end extending out of the button hole, so that the button mechanism 41 of all breaker poles is linked and keeps synchronous action.

[0048] As shown in Figure 6 The linkage mechanism 42 comprises a linkage 423, the linkage 423 is rotatably assembled in the breaker pole, the linkage 423 is connected with the button mechanism 41 through the first connecting rod 421 and connected with the operating mechanism 43 through the second connecting rod 422, the linkage 423 is provided with a gear tooth meshing with the gear set 332 of the driving module 3, preferably the gear tooth of the linkage 423 is located at the side close to the avoiding hole 121. The linkage 423 is linked with the linkages 423 in other breaker poles through the linkage shaft.

[0049] The operating mechanism 43 comprises a contact support, a jump buckle and a lock buckle, the contact support is rotatably assembled on the first base 12, the jump buckle and the lock buckle are rotatably assembled on the contact support, the jump buckle and one end of the lock buckle form a snap connection, the jump buckle is connected with the second connecting rod 422, one end of the contact support is connected with the movable contact. The short-circuit protection mechanism 44 comprises an electromagnetic release, the movable end of the electromagnetic release is opposite to one end of the lock buckle, when the short-circuit fault occurs, the movable end of the electromagnetic release is driven to trigger the lock buckle by the increased electromagnetic force, so that the operating mechanism 43 is tripped and de-energized; the other end of the lock buckle is connected with a tripping rod 431, the overload protection mechanism 47 comprises a bimetallic strip, one end of the bimetallic strip is fixed in the breaker pole, the movable end of the bimetallic strip cooperates with the tripping rod 431, when the overload fault occurs, the bimetallic strip is heated and bent to trigger the tripping rod 431 to trip the operating mechanism 43. Preferably, the lock buckles of the operating mechanisms 43 of the at least two breaker poles are linked through the lock buckle linkage, when the operating mechanism 43 of one breaker pole is triggered to trip due to fault, the operating mechanisms 43 of the remaining breaker poles are tripped through the lock buckle linkage.

[0050] In this embodiment, the second circuit breaker pole 2 has the same structure as the first circuit breaker pole 1, that is, the layout positions within the first base 12 and the second base 21 are the same, and both are provided with components such as an inlet terminal 481, an outlet terminal 482, a button mechanism 41, a linkage mechanism 42, an operating mechanism 43, a contact mechanism, a short-circuit protection mechanism 44, an arc-extinguishing chamber 46, an overload protection mechanism 47, and a current transformer 45. The linkage 423 of the first circuit breaker pole 1 is connected to the linkage 423 of the second circuit breaker pole 2 via a linkage shaft. The difference between the second circuit breaker pole 2 and the first circuit breaker pole 1 is that the outer shell of the second circuit breaker pole 2 only includes the second base 21. The difference between the second base 21 and the first base 12 is that the second base 21 does not have a clearance hole 121, but the clearance spaces 53 within the first circuit breaker pole 1 and the second circuit breaker pole 2 remain aligned.

[0051] like Figures 2-4 As shown in Figures 9-12, the drive module 3 includes a partition 31 and an electric operating transmission mechanism 33 and a circuit board 32 mounted on the partition 31. The partition 31 has the same shape as the outer shell of the first circuit breaker pole 1 and the second circuit breaker pole 2, that is, the partition 31 has the same shape as the first base 12 and the second base 21. An opening slot corresponding to the inlet socket 52 is provided at one end of the partition 31 to facilitate the insertion of the circuit breaker. Figure 9 As shown, a first mounting slot 311 for mounting a circuit board 32 and a second mounting slot 312 for mounting an electric operating transmission mechanism 33 are provided on the same side of the partition 31. The first mounting slot 311 is located in the middle of the partition 31 for mounting the circuit board 32. The second mounting slot 312 corresponds to the clearance space 53 between the first circuit breaker pole 1 and the second circuit breaker pole 2. Depending on the size of the circuit board 32, the first mounting slot 311 can be connected to the second mounting slot 312, or the first mounting slot 311 and the second mounting slot 312 can be relatively independent. The indentation of the second mounting groove 312 is greater than that of the first mounting groove 311, causing the bottom of the second mounting groove 312 to protrude towards the other side of the partition 31. That is, the bottom of the second mounting groove 312 extends and protrudes towards the clearance space 53 in the second circuit breaker pole 2. The opening of the second mounting groove 312 is opposite to the clearance hole 121 of the first circuit breaker pole 1. In this embodiment, the clearance spaces 53 in the first circuit breaker pole 1 and the second circuit breaker pole 2 are kept facing each other. The electric operating transmission mechanism 33, which is installed in the second mounting groove 312, is perpendicularly inserted along the thickness direction of the first circuit breaker pole 1 and the second circuit breaker pole 2. The circuit board 32 is located between two adjacent circuit breaker poles, between the first base 12 and the partition 31. The current transformer 45 is connected to the circuit board 32 to provide feedback current signals. It has good shielding effect and convenient wiring.

[0052] like Figures 2-6As shown, a signal port 321 is provided on the upper and / or lower side of one end of the circuit board 32. The outer shell of the first circuit breaker pole 1 and / or the outer shell of the second circuit breaker pole 2 are provided with communication ports that cooperate with the signal port 321. In this embodiment, the circuit board 32 is laid along the bottom of the first mounting groove 311. The circuit board 32 is located between the two circuit breaker poles and corresponds to the area between the button mechanism 41 and the outgoing terminal 482 of the circuit breaker pole. A communication port is provided at the inlet end of the two circuit breaker poles. Signal ports 321 are provided on both sides of one end of the circuit board 32, respectively installed into the communication ports of the two circuit breaker poles. Communication ports are also provided on the partition plate 31, the first outer shell, and the second base 21. The communication ports are located at the inlet end, and can be connected or disconnected from external wires and communication lines simultaneously by plugging and unplugging, which is beneficial for circuit breaker wiring.

[0053] like Figure 6 , 7 As shown in Figures 10-12, the electric operating transmission mechanism 33 includes a motor 331 and a gear set 332 connected by a drive connection. The output end of the motor 331 meshes with the gear set 332. The gear set 332 extends into one circuit breaker pole and connects with the linkage mechanism 42 within that circuit breaker pole. The other end of the motor 331 extends into another circuit breaker pole. In this embodiment, the output end of the motor 331 meshing with the gear set 332 serves as the drive end of the electric operating transmission mechanism 33. The drive end extends through the clearance hole 121 of the first base 12 into the clearance space 53 within the first circuit breaker pole 1. The drive end cooperates with the linkage mechanism 42 within the first circuit breaker pole 1, thereby achieving a drive connection to the operating mechanism 43 in the first circuit breaker pole 1. The other end of the motor 331 serves as the fixed end of the electric operating transmission mechanism 33, mounted in the second mounting groove 312, and extends through the second mounting groove 312 into the clearance space 53 within the second circuit breaker pole 2. The clearance space 53 between the first circuit breaker pole 1 and the second circuit breaker pole 2 is directly opposite, allowing the motor 331 to be vertically assembled within the second mounting slot 312. That is, both ends of the motor 331 are perpendicular to the first circuit breaker pole 1 and the second circuit breaker pole 2, thus the motor 331 is primarily located within the second circuit breaker pole 2, and the gear set 332 is primarily located within the first circuit breaker pole 1. The electric operating transmission mechanism 33 is arranged parallel to the button mechanisms 41 of the two circuit breaker poles, located on one side of the button mechanisms 41. After assembly, the overall thickness of the circuit breaker is thinner or approximately the same as that of existing two-pole circuit breakers. It should be noted that when some gears of the gear set 332 are also assembled within the second mounting slot 312, the second mounting slot 312 provides gear support and space for gear rotation.

[0054] In the embodiment, the gear set 332 and the motor 331 are respectively located at two sides of the circuit board 32, the output end of the motor 331 passes through the circuit board 32 and engages with the gear set 332, as shown in Figure 11 、 12 The gear set 332 includes five gears which are sequentially engaged, i.e. the first gear, the second gear, the third gear, the fourth gear and the fifth gear, the first gear is preferably connected with the output end of the motor 331 through a worm, the fifth gear engages with the tooth of the linkage 423 in the first breaker pole 1 through the avoiding hole 121 of the first base 12, the avoiding space 53 of the first breaker pole 1 provides the rotating space for the fifth gear, of course, except the fifth gear, the rest gears can be all or partially extended into the first breaker pole 1, in addition, the number of gears of the gear set 332 can be increased or decreased according to the actual needs, the size of the avoiding space 53 can be optimized according to the number of the gear set 332 and the assembling position, so as to further improve the overall size of the circuit breaker.

[0055] The above is the further detailed description of the present application in combination with the specific preferred embodiments, and the specific implementation of the present application cannot be limited to these descriptions. For the ordinary skilled in the art to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, and all of them shall be regarded as falling within the protection scope of the present application.

Claims

1. A plug-in circuit breaker, comprising at least two circuit breaker poles arranged in parallel, each circuit breaker pole being provided with a linkage mechanism (42) and an operating mechanism (43) connected to the linkage mechanism (42), characterized in that: It also includes an electric operating transmission mechanism (33) that extends into the two circuit breaker poles at both ends. A clearance space (53) is reserved on one side of the linkage mechanism (42) of the two circuit breaker poles. The clearance spaces (53) of the two circuit breaker poles are kept facing each other. The two ends of the electric operating transmission mechanism (33) extend into the two clearance spaces (53) respectively. The linkage mechanisms (42) of the two circuit breaker poles are linked through a linkage shaft. The electric operating transmission mechanism (33) cooperates with the linkage mechanism (42) of one of the circuit breaker poles to drive the circuit breaker pole to automatically open and close. The linkage mechanism (42) of the circuit breaker pole drives the other circuit breaker poles to automatically open and close through the linkage shaft.

2. The plug-in circuit breaker according to claim 1, characterized in that: Each circuit breaker pole has two ends serving as an incoming line end and an outgoing line end, respectively. The outgoing line end is provided with an outgoing line port (51) and a button hole. An outgoing line terminal (482) and a button mechanism (41) are respectively installed in the outgoing line port (51) and the button hole. A linkage mechanism (42) and an operating mechanism (43) are provided between the button mechanism (41) and the incoming line terminal (481). The linkage mechanism (42) is located between the operating mechanism (42) and the button mechanism (41). A clearance space (53) is reserved on one side of the linkage mechanism (42), the button mechanism (41) and the outgoing line terminal (482). The clearance space (53) is arranged side by side with the button mechanism (41).

3. A plug-in circuit breaker according to claim 1, characterized in that: The two ends of the electric drive mechanism (33) extend vertically into the two circuit breaker poles along the thickness direction of the two circuit breaker poles.

4. A plug-in circuit breaker according to claim 1, characterized in that: The electric transmission mechanism (33) includes a motor (331) and a gear set (332). The output end of the motor (331) is meshed with the gear set (332). The gear set (332) extends into one circuit breaker pole and is connected to the linkage mechanism (42) within that circuit breaker pole. The other end of the motor (331) extends into another circuit breaker pole.

5. A plug-in circuit breaker according to claim 1, characterized in that: It also includes a partition (31) and a circuit board (32), the partition (31) being disposed between two circuit breaker poles, and the circuit board (32) being connected to and mounted on the partition (31) by an electric operating transmission mechanism (33).

6. A plug-in circuit breaker according to claim 5, characterized in that: On the same side of the partition (31), there is a first mounting groove (311) for mounting the circuit board (32) and a second mounting groove (312) for mounting the electric control transmission mechanism (33). The second mounting groove (312) is more recessed than the first mounting groove (311), so that the bottom of the second mounting groove (312) protrudes to the other side of the partition (31).

7. A plug-in circuit breaker according to claim 6, characterized in that: The circuit board (32) is laid along the bottom of the first mounting groove (311). The electric transmission mechanism (33) includes a motor (331) and a gear set (332). The motor (331) is assembled in the second mounting groove (312) and extends through the second mounting groove (312) to a circuit breaker pole. The output end of the motor (331) is driven and connected to the gear set (332). The gear set (332) extends to another circuit breaker pole.

8. A plug-in circuit breaker according to claim 1, characterized in that: Each circuit breaker pole has an input socket (52) at one end as the input end, and an input terminal (481) is installed in the input socket (52). The other end of the circuit breaker pole has an output port (51) and a button hole as the output end. An output terminal (482) and a button mechanism (41) are installed in the output port (51) and the button hole, respectively. A linkage mechanism (42) is set between the operating mechanism (43) and the button mechanism (41). The button mechanism (41) realizes manual operation of the operating mechanism (43) through the linkage mechanism (42).

9. A plug-in circuit breaker according to claim 8, characterized in that: The linkage mechanism (42) includes a linkage component (423), which is rotatably mounted inside the circuit breaker pole. The linkage component (423) is connected to the button mechanism (41) through the first link (421) and to the operating mechanism (43) through the second link (422). The linkage component (423) is provided with gear teeth. The linkage component (423) is linked with the linkage components (423) in other circuit breaker poles through the linkage shaft.

10. A plug-in circuit breaker according to claim 9, characterized in that: Between the operating mechanism (43) of each circuit breaker pole and the incoming terminal (481), there is also a contact mechanism, an arc-extinguishing chamber (46), a short-circuit protection mechanism (44) and an overload protection mechanism (47). The moving contact of the contact mechanism is connected to the operating mechanism (43), and the stationary contact of the contact mechanism is fixedly set and opposite to the moving contact. The operating mechanism (43) includes a contact support, a jumper and a latch. The contact support is rotatably mounted on the first base (12). The jumper and the latch are rotatably mounted on the contact support. The jumper and the latch are connected by a latch. The jumper is connected to the second link (422). The button mechanism (41) of the at least two circuit breaker poles extends out of the button hole and is linked by a handle linkage, and the latch of the operating mechanism (43) of the at least two circuit breaker poles is linked by a latch linkage.

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