Modularized molded case circuit breaker

Abstract

The utility model relates to the technical field of molded case circuit breakers, in particular to a modularized molded case circuit breaker. The modularized molded case circuit breaker provided by the utility model comprises an operation module and a release module which are spliced with each other, and the release module is located at the lower side of the operation module and has multiple types of choices; a first guiding and limiting splicing structure is arranged between the operation module and the release module, and the first guiding and limiting splicing structure is used for guiding, limiting and splicing the operation module and the release module in the front-back direction of the release module and the operation module; a connecting structure is arranged between the operation module and the release module, and the connecting structure is used for fixedly connecting the operation module and the release module. And rapid development and iteration can be realized only by developing and manufacturing release modules with different functions, the cost is reduced, the operation module forms a general part, the first guiding and limiting splicing structure can be spliced in a guiding and limiting manner along the front and back directions of the operation module and the release module, and the splicing is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of molded case circuit breaker, especially to a modular molded case circuit breaker. BACKGROUND

[0002] With the sustained development of economy and the increasing of power consumption, the type of power equipment is diversified, and the safety of power consumption is paid more and more attention, and the circuit breaker can cut off the power supply quickly when the fault occurs, so it is widely used.

[0003] Usually, the integrated circuit breaker needs to develop many different types of circuit breakers to realize different functions. There are few common parts between different types of circuit breakers, and many similar parts will be developed synchronously for each type of circuit breaker, which increases the design difficulty and increases the hidden cost. Developing a new circuit breaker also needs supporting production workshop and equipment, and the product cost is high, which has no sufficient competitiveness. INVENTION CONTENTS

[0004] The utility model aims at providing a modular molded case circuit breaker to solve the technical problem that the integrated circuit breaker needs to develop many different types of circuit breakers to realize different functions, has few common parts, many types of parts, and high production and design cost.

[0005] The utility model provides a modular molded case circuit breaker, which comprises an operating module and a tripping device module which are spliced with each other, the tripping device module is located at the lower side of the operating module, and the tripping device module has multiple types of selection.

[0006] A first guiding and limiting splicing structure is arranged between the operating module and the tripping device module, and the first guiding and limiting splicing structure is used for guiding and limiting splicing the operating module and the tripping device module in the front-back direction of the tripping device module and the operating module.

[0007] A connecting structure is arranged between the operating module and the tripping device module, and the connecting structure is used for fixedly connecting the operating module and the tripping device module.

[0008] The structure and size of the operating system, the contact system and the arc extinguishing system of the operating module are the same under at least two types of tripping device modules.

[0009] The structure and size of the first guiding and limiting splicing structure and the connecting structure between the operating module and the at least two types of tripping device modules are the same.

[0010] As a further technical scheme, the first guiding and limiting splicing structure comprises a dovetail protrusion arranged on the operation module and a dovetail groove arranged on the tripping device module.

[0011] The dovetail protrusion is inserted into the dovetail groove along the front-rear direction of the tripping device module.

[0012] As a further technical scheme, the first guiding and limiting splicing structure further comprises a guiding and limiting groove arranged on the operation module and a guiding and limiting protrusion arranged on the tripping device module.

[0013] The guiding and limiting protrusion is inserted into the guiding and limiting groove along the front-rear direction of the operation module.

[0014] As a further technical scheme, along the left-right direction of the operation module and the tripping device module, the operation module and the tripping device module have multiple poles, the operation module is alternately provided with multiple dovetail protrusions and multiple guiding and limiting grooves, and the dovetail protrusion is located at the rear end of the guiding and limiting groove, the tripping device module is alternately provided with multiple dovetail grooves and multiple guiding and limiting protrusions, and the dovetail groove is located at the rear end of the guiding and limiting protrusion.

[0015] The dovetail protrusion corresponds to the dovetail groove one by one, the guiding and limiting groove corresponds to the guiding and limiting protrusion one by one, and the guiding and limiting groove is arranged at each pole interval of the operation module, and the guiding and limiting protrusion is arranged at each pole interval of the tripping device module.

[0016] As a further technical scheme, the first guiding and limiting splicing structure comprises a guiding and limiting step arranged inside the left and right side walls of the operation module and a step-shaped protrusion arranged on the left and right sides of the tripping device module.

[0017] The step-shaped protrusion abuts on the guiding and limiting step along the front-rear direction of the operation module.

[0018] As a further technical scheme, the connecting structure comprises a connecting piece, a first connecting hole arranged on the rear side of the operation module, and a second connecting hole arranged on the rear side of the step-shaped protrusion.

[0019] The first connecting hole penetrates the guiding and limiting step, the connecting piece is arranged in the first connecting hole and the second connecting hole, and is fixedly connected with at least the second connecting hole.

[0020] As a further technical scheme, a second guiding and limiting splicing structure is further included, the operation module comprises a first rear base and a first front cover arranged on the front side of the first rear base, and the tripping device module comprises a second rear base and a second front cover arranged on the front side of the second rear base.

[0021] The first guiding and limiting splicing structure is arranged between the first rear base and the second rear base, and is used for guiding and limiting splicing the first rear base and the second rear base along the front-rear direction of the first rear base and the second rear base.

[0022] The second guiding and limiting splicing structure is arranged between the first front cover and the second front cover, and is used for guiding and limiting splicing the first front cover and the second front cover along the up-down direction of the first front cover and the second front cover.

[0023] As a further technical solution, the second guiding and limiting splicing structure comprises an insertion block arranged on the left and right sides of the first front cover and an insertion slot arranged on the left and right sides of the second front cover.

[0024] The insertion block is inserted into the insertion slot along the up-down direction of the second front cover.

[0025] As a further technical solution, the second guiding and limiting splicing structure comprises a guiding and limiting table arranged in the inner side of the left and right side walls of the first front cover and a guiding and limiting protruding block arranged on the left and right sides of the second front cover.

[0026] The guiding and limiting protruding block is inserted between the guiding and limiting table and the front side wall of the first front cover along the up-down direction of the first front cover, and the guiding and limiting protruding block and the guiding and limiting table are in abutment.

[0027] As a further technical solution, the guiding and limiting table and the stepped protruding block each have multiple levels corresponding to each other and capable of being matched.

[0028] Compared with the prior art, the modular plastic shell circuit breaker provided by the utility model has the following technical advantages:

[0029] The modular plastic shell circuit breaker provided by the utility model comprises an operating module and a release module which are spliced with each other, the release module is located on the lower side of the operating module, the release module has multiple types for selection, a first guiding and limiting splicing structure is arranged between the operating module and the release module, the first guiding and limiting splicing structure is used for guiding and limiting splicing the operating module and the release module along the front-rear direction of the release module and the operating module, a connecting structure is arranged between the operating module and the release module, the connecting structure is used for fixedly connecting the operating module and the release module, the structure and size of the operating system, the contact system and the arc extinguishing system of the operating module are the same under at least two types of release modules, and the structure and size of the first guiding and limiting splicing structure and the connecting structure between the operating module and the at least two types of release modules are the same.

[0030] The general part of the integrated molded case circuit breaker of different function types is separately modularized to form an operation module, the tripper part of the integrated molded case circuit breaker of different function types is separately modularized to form tripper modules of different functions, only the tripper modules and the operation module need to be spliced according to the requirements of different function types to form molded case circuit breakers of different functions, and only the tripper modules of different functions need to be developed and manufactured subsequently, so that the molded case circuit breakers can be quickly developed and iterated, cost is reduced, market demands are met, the operation module forms a general part, can be produced separately in the production process, a large number of spare parts can be stored, the product delivery cycle is shortened, and the cost of parts is minimized. Meanwhile, the operation module and the tripper module can be spliced in the front-back direction of the operation module and the tripper module through the first guiding and limiting splicing structure, so that splicing is convenient.

[0031] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0033] Figure 1 The modular molded case circuit breaker structure schematic diagram provided by the embodiments of the present application;

[0034] Figure 2 The modular molded case circuit breaker explosion diagram provided by the embodiments of the present application;

[0035] Figure 3 The operation module structure schematic diagram provided by the embodiments of the present application;

[0036] Figure 4 The operation module rear side schematic diagram provided by the embodiments of the present application;

[0037] Figure 5 The tripper module structure schematic diagram provided by the embodiments of the present application.

[0038] Icon: 1 - operation module; 2 - tripping device module; 3 - dovetail protrusion; 4 - dovetail groove; 5 - guide limiting groove; 6 - guide limiting convex rib; 7 - guide limiting step; 71 - first step; 72 - second step; 8 - stepped protrusion; 81 - first protrusion; 82 - second protrusion; 9 - first connecting hole; 10 - second connecting hole; 11 - first rear base; 12 - first front cover; 13 - second rear base; 14 - second front cover; 15 - plug; 16 - slot; 17 - guide limiting table; 18 - guide limiting protrusion; 19 - surface cover; 20 - reinforcing rib. DETAILED DESCRIPTION

[0039] The technical solutions of the present application will be described below in conjunction with the embodiments, obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0040] In the description of the present application, it should be pointed out that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present application, it should be pointed out that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection required by the present application.

[0043] The present application will be described in further detail below through specific examples and in conjunction with the drawings.

[0044] The specific structure is as shown in Figures 1 to 5

[0045] The embodiment provides a modular plastic shell circuit breaker, which comprises an operating module 1 and a tripping module 2 spliced with each other, the tripping module 2 is located at the lower side of the operating module 1, the tripping module 2 has multiple types of selection, a first guiding and limiting splicing structure is arranged between the operating module 1 and the tripping module 2, the first guiding and limiting splicing structure is used for guiding and limiting splicing the operating module 1 and the tripping module 2 in the front-back direction of the tripping module 2 and the operating module 1, a connecting structure is arranged between the operating module 1 and the tripping module 2, the connecting structure is used for fixedly connecting the operating module 1 and the tripping module 2, the structures and sizes of an operating system, a contact system and an arc extinguishing system of the operating module 1 are all same under at least two types of tripping modules 2, and the structures and sizes of the first guiding and limiting splicing structure and the connecting structure between the operating module 1 and the at least two types of tripping modules 2 are all same.

[0046] In the embodiment, the common part of the integrated plastic shell circuit breaker of different functional types is separately modularized to form the operating module 1, and the tripping part of the integrated plastic shell circuit breaker of different functional types is separately modularized to form the tripping module 2 of different functions, so that the plastic shell circuit breaker of different functional types can be formed only by splicing the tripping module 2 and the operating module 1 according to the demand of different functional types, and only the tripping module 2 of different functions needs to be developed and manufactured subsequently, so that the development and iteration can be quickly realized, the cost is reduced, the market demand is met, the operating module 1 forms a common part, the operating module 1 can be separately produced in the production process, a large number of spare parts can be stored, the product supply cycle is shortened, and the cost of parts is minimized. Meanwhile, the operating module 1 and the tripping module 2 can be guided and limited in splicing in the front-back direction of the operating module 1 and the tripping module 2 through the first guiding and limiting splicing structure, so that the splicing is convenient.

[0047] In the optional technical scheme of the embodiment, the first guiding and limiting splicing structure comprises a dovetail protrusion 3 arranged on the operating module 1 and a dovetail groove 4 arranged on the tripping module 2, and the dovetail protrusion 3 is inserted into the dovetail groove 4 in the front-back direction of the tripping module 2.

[0048] ​In the embodiment, the dovetail protrusions 3 and the dovetail grooves 4 are arranged to limit the assembly of the operating module 1 and the tripping device module 2 in the front-rear direction, and to limit the movement of the operating module 1 and the tripping device module 2 in the up-down and left-right directions after the assembly. The operating module 1 and the tripping device module 2 are fixedly connected by the connecting structure after the assembly, and the movement of the operating module 1 and the tripping device module 2 in the front-rear direction is limited. The whole assembly is convenient, and the overall structure after the assembly is stable. In addition, compared with the buckle butt joint in the prior art, the assembly by the dovetail protrusions 3 and the dovetail grooves 4 is more stable.

[0049] In the preferred embodiment, the reinforcing ribs 20 are connected to the dovetail protrusions 3 and the operating module 1, respectively, to improve the strength of the dovetail protrusions 3 and prevent the dovetail protrusions 3 from breaking.

[0050] In the optional technical solution of the embodiment, the first guiding and limiting assembly structure further includes guiding and limiting grooves 5 arranged on the operating module 1 and guiding and limiting protrusions 6 arranged on the tripping device module 2. The guiding and limiting protrusions 6 are inserted into the guiding and limiting grooves 5 in the front-rear direction of the operating module 1.

[0051] In the embodiment, the guiding and limiting grooves 5 and the guiding and limiting protrusions 6 are arranged to limit the assembly of the operating module 1 and the tripping device module 2 in the front-rear direction, and to limit the movement of the operating module 1 and the tripping device module 2 in the left-right direction after the assembly. The limiting effect after the assembly is further improved, and the assembly of the operating module 1 and the tripping device module 2 is more stable.

[0052] In the optional technical solution of the embodiment, there are multiple poles between the operating module 1 and the tripping device module 2 in the left-right direction of the operating module 1 and the tripping device module 2. The operating module 1 is alternately provided with multiple dovetail protrusions 3 and multiple guiding and limiting grooves 5, and the dovetail protrusions 3 are located at the rear ends of the guiding and limiting grooves 5. The tripping device module 2 is alternately provided with multiple dovetail grooves 4 and multiple guiding and limiting protrusions 6, and the dovetail grooves 4 are located at the rear ends of the guiding and limiting protrusions 6. The dovetail protrusions 3 correspond to the dovetail grooves 4 one by one, and the guiding and limiting grooves 5 correspond to the guiding and limiting protrusions 6 one by one. The guiding and limiting grooves 5 are arranged at each pole interval of the operating module 1, and the guiding and limiting protrusions 6 are arranged at each pole interval of the tripping device module 2.

[0053] In the embodiment, during the installation of the operation module 1 and the tripping device module 2, the guiding and limiting grooves 5 and the guiding and limiting ribs 6 are first installed in the front-rear direction until the dovetail protrusions 3 at the rear ends of the guiding and limiting grooves 5 enter the dovetail grooves 4 at the rear ends of the guiding and limiting ribs 6. The mutual cooperation of the guiding and limiting grooves 5 and the guiding and limiting ribs 6 and the mutual cooperation of the dovetail protrusions 3 and the dovetail grooves 4 improve the stability and the convenience of splicing. Meanwhile, after splicing is completed, each pole gap between the operation module 1 and the tripping device module 2 is provided with a limiting rib and a guiding and limiting groove 5. The guiding and limiting rib located in the guiding and limiting groove 5 separates the pole gap, thereby improving safety.

[0054] In an optional technical solution of the embodiment, the first guiding and limiting splicing structure includes guiding and limiting steps 7 arranged on the inner sides of the left and right side walls of the operation module 1 and step-shaped protrusions 8 arranged on the left and right sides of the tripping device module 2. The step-shaped protrusions 8 abut on the guiding and limiting steps 7 in the front-rear direction of the operation module 1.

[0055] In the embodiment, during the installation of the operation module 1 and the tripping device module 2, when the dovetail protrusions 3 enter the dovetail grooves 4, the step-shaped protrusions 8 abut on the guiding and limiting steps 7 in the front-rear direction of the operation module 1, thereby limiting the dovetail protrusions 3 from continuously moving out of the front side of the dovetail grooves 4, and ensuring the accuracy of the positions of the operation module 1 and the tripping device module 2 after splicing.

[0056] Preferably, in the embodiment, the guiding and limiting steps 7 and the step-shaped protrusions 8 each have multiple levels corresponding to each other and capable of cooperating, thereby further improving the stability of limiting.

[0057] Specifically, the guiding and limiting steps 7 include first-level steps 71 and second-level steps 72, and the step-shaped protrusions 8 include first-level protrusions 81 and second-level protrusions 82. The first-level steps 71 abut on the first-level protrusions 81, and / or the second-level steps 72 abut on the second-level protrusions 82.

[0058] In an optional technical solution of the embodiment, the connecting structure includes a connecting piece, a first connecting hole 9 arranged on the rear side of the operation module 1, and a second connecting hole 10 arranged on the rear side of the step-shaped protrusions 8. The first connecting hole 9 penetrates the guiding and limiting steps 7, the connecting piece is arranged in the first connecting hole 9 and the second connecting hole 10, and is fixedly connected with at least the second connecting hole 10.

[0059] In the embodiment, after the splicing of the operation module 1 and the tripping device module 2 is completed, the first connecting hole 9 and the second connecting hole 10 correspond to each other. The connecting piece sequentially penetrates the first connecting hole 9 and the second connecting hole 10 to fixedly connect the operation module 1 and the tripping device module 2, thereby limiting the movement of the operation module 1 and the tripping device module 2 in the front-rear direction.

[0060] Preferably, the connecting member is a bolt, the first connecting hole 9 can be a through hole or a threaded hole, and the second connecting hole 10 is at least partially a threaded hole, which is simple in structure and stable in connection.

[0061] In the optional technical solution of the embodiment, the operating module 1 includes a first rear base 11 and a first front cover 12 arranged in front of the first rear base 11, and the tripping device module 2 includes a second rear base 13 and a second front cover 14 arranged in front of the second rear base 13. A first guiding and limiting splicing structure is arranged between the first rear base 11 and the second rear base 13, and is used for guiding and limiting splicing the first rear base 11 and the second rear base 13 in the front-rear direction of the first rear base 11 and the second rear base 13. A second guiding and limiting splicing structure is arranged between the first front cover 12 and the second front cover 14, and is used for guiding and limiting splicing the first front cover 12 and the second front cover 14 in the up-down direction of the first front cover 12 and the second front cover 14.

[0062] In the embodiment, the dovetail protrusion 3 and the dovetail groove 4 can limit the first rear base 11 and the second rear base 13 to be spliced only in the front-rear direction. After the first rear base 11 and the second rear base 13 are spliced, the second front cover 14 is spliced. The second guiding and limiting splicing structure between the second front cover 14 and the first front cover 12 can limit the two to be spliced only in the up-down direction. After the second front cover 14 and the first front cover 12 are spliced, the first rear base 11, the second rear base 13, and the second front cover 14 are fixedly connected through a connecting structure. The first connecting hole 9 is located on the rear side of the first rear base 11. The second connecting hole 10 is partially located on the second rear base 13 and partially located on the second front cover 14, and at least the part on the second front cover 14 is a threaded hole. The structure is simple and convenient to splice.

[0063] In the optional technical solution of the embodiment, the second guiding and limiting splicing structure includes an insertion block 15 arranged on the left and right sides of the first front cover 12 and an insertion slot 16 arranged on the left and right sides of the second front cover 14. The insertion block 15 is inserted into the insertion slot 16 in the up-down direction of the second front cover 14. The structure is simple, convenient to splice through insertion, and good in limiting effect after splicing.

[0064] In the optional technical solution of the embodiment, the second guiding and limiting splicing structure includes a guiding and limiting table 17 arranged on the inner sides of the left and right side walls of the first front cover 12 and a guiding and limiting protrusion 18 arranged on the left and right sides of the second front cover 14. The guiding and limiting protrusion 18 is inserted between the guiding and limiting table 17 and the front side wall of the first front cover 12 in the up-down direction of the first front cover 12.

[0065] In the embodiment, when the second front cover 14 is spliced on the first front cover 12, the first rear base 11, the second rear base 13 and the second front cover 14 are connected through the connecting piece, and the second front cover 14 is abutted with the guide limiting block 18 and the guide limiting table 17 in the front-back direction, the first front cover 12 is pressed on the first rear base 11, the splicing and fixing of the first front cover 12 is realized, the first connecting hole 9 does not need to penetrate the first front cover 12, and the integrity of the first front cover 12 is not damaged.

[0066] In the optional technical solution of the embodiment, the face cover 19 is further included, and the face cover 19 is arranged on the front side of the operating module 1 and the front side of the tripping device module 2. When the operating module 1 and the tripping device module 2 are spliced, the face cover 19 is arranged on the front side of the operating module 1 and the tripping device module 2, so that the operating module 1 and the tripping device module 2 are further fixed and connected through the front cover, and the overall stability is improved.

[0067] In the embodiment, the operating module 1 further includes an operating system, a contact system and an arc extinguishing system; the first front cover 12 and the first rear base 11 form the first installation cavity, and the operating system, the contact system and the arc extinguishing system are arranged in the first installation cavity; the tripping device module 2 further includes a connecting conductor and a tripping device, and the tripping device has multiple types of selection; and the second front cover 14 and the second rear base 13 form the second installation cavity, and the tripping device and the connecting conductor are arranged in the second installation cavity, the connecting conductor is electrically connected with the movable contact of the contact system to form a main circuit.

[0068] The specific splicing mode of the embodiment is as follows:

[0069] The first front cover 12 is arranged on the front side of the first rear base 11, the front end of the second rear base 13 is inclined to the side away from the first rear base 11, the rear end of the second rear base 13 is inclined to the side close to the first rear base 11, that is, the second rear base 13 is rotated by a certain angle, the rear end of the guide limiting protrusion 6 on the second rear base 13 is first obliquely inserted into the guide limiting groove 5 on the first rear base 11, the guide limiting protrusion 6 slides along the guide limiting groove 5 for a distance, then the second rear base 13 is righted, the second rear base 13 is parallel to the first rear base 11 in the front-rear direction and is spliced backward, until the guide limiting step 7 abuts against the step-shaped protrusion 8, at this time, the swallow-tail protrusion 3 enters the swallow-tail groove 4; the front end of the second front cover 14 is inclined to the side close to the first front cover 12, the rear end of the second front cover 14 is inclined to the side away from the first front cover 12, that is, the second front cover 14 is rotated by a certain angle, wherein the rotating direction of the second front cover 14 is opposite to that of the second rear base 13, the guide limiting protrusion 18 on the second front cover 14 is obliquely inserted between the guide limiting step 17 and the front side wall of the first front cover 12, the insertion block 15 is obliquely inserted into the insertion groove 16, then the second front cover 14 is righted, the second front cover 14 is parallel to the first front cover 12 in the up-down direction and is spliced upward, after splicing, the outer edges of the first front cover 12, the first rear base 11, the second front cover 14 and the second rear base 13 are flush, then the connecting piece is connected through the first connecting hole 9 and the second connecting hole 10, finally, the face cover 19 is connected to the front side of the first front cover 12 and the second front cover 14, the complete modular plastic shell circuit breaker is formed after the whole splicing is completed. Due to the structure limitation of the operating module 1 and the tripping module 2, the first guide limiting splicing structure and the second guide limiting splicing structure located on the operating module 1 and part of components of the operating module 1 all protrude to the lower side, this splicing mode can avoid the interference of the protruding parts and facilitate splicing.

[0070] It should be noted that, in the embodiment, the front-rear-left-right-up-down directions are as follows: the front side of the modular plastic shell circuit breaker is the front side, that is, the side where the handle of the operating system protrudes, the back side of the modular plastic shell circuit breaker is the back side, in the front side view of the modular plastic shell circuit breaker, the up-down-left-right directions of the person facing the modular plastic shell circuit breaker are the up-down-left-right directions in the embodiment, and the handle of the operating system can be pulled up and down.

[0071] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A modular molded case circuit breaker, characterized in that, It includes an operation module (1) and a trip unit module (2) that are spliced ​​together, and the trip unit module (2) is located below the operation module (1). The trip unit module (2) has multiple types to choose from. A first guide limiting splicing structure is provided between the operation module (1) and the trip unit module (2). The first guide limiting splicing structure is used to guide and limit the splicing of the operation module (1) and the trip unit module (2) along the front and rear directions of the trip unit module (2) and the operation module (1). A connection structure is provided between the operation module (1) and the trip unit module (2), and the connection structure is used to fix the operation module (1) and the trip unit module (2); In at least two types of trip unit modules (2), the operating system, contact system and arc extinguishing system of the operating module (1) have the same structure and size; The structure and dimensions of the first guide limit splicing structure and the connecting structure between the operation module (1) and at least two types of the trip unit module (2) are the same.

2. The modular molded case circuit breaker according to claim 1, characterized in that, The first guide limiting splicing structure includes a dovetail protrusion (3) disposed on the operation module (1) and a dovetail groove (4) disposed on the trip unit module (2); The dovetail protrusion (3) is inserted into the dovetail groove (4) along the front-back direction of the trip unit module (2).

3. The modular molded case circuit breaker according to claim 2, characterized in that, The first guide limiting splicing structure also includes a guide limiting groove (5) disposed on the operation module (1) and a guide limiting rib (6) disposed on the trip unit module (2); The guide limiting rib (6) is inserted into the guide limiting groove (5) along the front and rear direction of the operation module (1).

4. The modular molded case circuit breaker according to claim 3, characterized in that, Along the left and right directions of the operation module (1) and the trip unit module (2), there are multiple poles between the operation module (1) and the trip unit module (2). The operation module (1) is alternately provided with multiple dovetail protrusions (3) and multiple guide limiting grooves (5), and the dovetail protrusions (3) are located at the rear end of the guide limiting grooves (5). The trip unit module (2) is alternately provided with multiple dovetail grooves (4) and multiple guide limiting ribs (6), and the dovetail grooves (4) are located at the rear end of the guide limiting ribs (6). The dovetail protrusion (3) corresponds one-to-one with the dovetail groove (4), the guide limiting groove (5) corresponds one-to-one with the guide limiting rib (6), and the guide limiting groove (5) is provided at each pole of the operation module (1), and the guide limiting rib (6) is provided at each pole of the trip unit module (2).

5. The modular molded case circuit breaker according to claim 1, characterized in that, The first guide limiting splicing structure includes guide limiting steps (7) disposed on the inner side of the left and right side walls of the operation module (1) and step-shaped protrusions (8) disposed on the left and right sides of the trip unit module (2); The stepped protrusion (8) abuts against the guide limiting step (7) along the front-back direction of the operation module (1).

6. The modular molded case circuit breaker according to claim 5, characterized in that, The connection structure includes a connector, a first connection hole (9) disposed on the rear side of the operation module (1), and a second connection hole (10) disposed on the rear side of the stepped protrusion (8); The first connecting hole (9) passes through the guide limiting step (7), and the connector passes through the first connecting hole (9) and the second connecting hole (10), and is at least fixedly connected to the second connecting hole (10).

7. The modular molded case circuit breaker according to any one of claims 1-6, characterized in that, It also includes a second guide limit splicing structure. The operation module (1) includes a first rear base (11) and a first front cover (12) covering the front side of the first rear base (11). The trip unit module (2) includes a second rear base (13) and a second front cover (14) covering the front side of the second rear base (13). A first guide limiting splicing structure is provided between the first rear base (11) and the second rear base (13). The first guide limiting splicing structure is used to guide and limit the splicing of the first rear base (11) and the second rear base (13) along the front and rear directions of the first rear base (11) and the second rear base (13). A second guide limiting splicing structure is provided between the first front cover (12) and the second front cover (14). The second guide limiting splicing structure is used to guide and limit the splicing of the first front cover (12) and the second front cover (14) along the up and down direction of the first front cover (12) and the second front cover (14).

8. The modular molded case circuit breaker according to claim 7, characterized in that, The second guide limiting splicing structure includes inserts (15) disposed on the left and right sides of the first front cover (12) and slots (16) disposed on the left and right sides of the second front cover (14); The insert (15) is inserted into the slot (16) along the vertical direction of the second front cover (14).

9. The modular molded case circuit breaker according to claim 7, characterized in that, The second guide limiting splicing structure includes a guide limiting platform (17) disposed on the inner side of the left and right side walls of the first front cover (12) and guide limiting protrusions (18) disposed on the left and right sides of the second front cover (14). The guide limiting protrusion (18) is inserted between the guide limiting platform (17) and the front side wall of the first front cover (12) along the vertical direction of the first front cover (12), and the guide limiting protrusion (18) abuts against the guide limiting platform (17).

10. The modular molded case circuit breaker according to claim 5, characterized in that, The guide limiting step (7) and the step-shaped protrusion (8) both have multiple levels that correspond to each other and can cooperate.

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