Molded case circuit breaker accessory installation structure and molded case circuit breaker thereof

Abstract

The utility model discloses a molded case circuit breaker accessory installation structure and a molded case circuit breaker thereof, comprising an accessory device which is detachably arranged at the top of an upper cover and is located at one side of an operating mechanism, and the accessory device comprises a first accessory carrier provided with a first accessory groove and a second accessory carrier provided with a second accessory groove. The first accessory carrier is rotatably provided with a push rod structure located on the motion path of the rotating shaft structure, a first accessory module matched with the push rod structure is installed in the first accessory groove, and a second accessory module matched with the tripping rod is installed in the second accessory groove. Through reasonable optimization design of position structures among the operating mechanism, the rotating shaft structure and the accessory device, modular installation and reliable cooperation among the operating mechanism, the rotating shaft structure and the accessory device are realized, the installation requirements of a plurality of accessory modules on the accessory device can be met, and the use functions of the circuit breaker are improved and expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a molded case circuit breaker accessory mounting structure and a molded case circuit breaker. Background Art

[0002] Molded case circuit breakers are widely used in distribution lines for infrequent switching and motor protection. Electronic molded case circuit breakers have overload long delay inverse time, short circuit short delay inverse time, short circuit short delay definite time, short circuit instantaneous and undervoltage protection functions, which can protect lines and power equipment from damage.

[0003] The existing molded case circuit breaker mainly includes a base, an upper cover, a top cover, an operating mechanism, a rotating shaft, a moving contact, a static contact, an arc extinguishing chamber and an accessory module. The accessory module can select a shunt module, an auxiliary contact and an auxiliary alarm module according to needs. The rotating shaft is passed through the base and can be rotatably set relative to the base. The three moving contacts are respectively installed on the rotating shaft to realize synchronous rotation. The operating mechanism is fixed on the base and connected to the rotating shaft through a connecting rod structure, so that the operating mechanism controls the rotation of the rotating shaft, and then the rotating shaft drives the three moving contacts to contact or separate with the three static contacts. The existing operating mechanism, rotating shaft and moving contact are all installed in the internal space formed between the base and the upper cover. In particular, the assembly of the three parts of the moving contact, rotating shaft and operating mechanism is too complicated, and the installation and maintenance are relatively inconvenient, which is not conducive to the development of the circuit breaker towards modular assembly. Therefore, in order to develop towards modular installation, the existing molded case circuit breakers have to re-layout and redesign the structural positions of the operating mechanism and the rotating shaft. Due to the change in the structural position, the existing accessory modules are no longer well applicable. Therefore, technicians are required to design an accessory installation structure that can meet the installation requirements of various accessory modules and can be used in conjunction with the operating mechanism and rotating shaft structure installation. This undoubtedly increases the design difficulty. Utility Model Content

[0004] Therefore, the purpose of the present invention is to overcome the deficiencies in the prior art and to provide a molded case circuit breaker accessory mounting structure and a molded case circuit breaker thereof that can meet the installation requirements of various accessory modules and can be installed and used in conjunction with an operating mechanism and a rotating shaft structure.

[0005] To achieve the above objectives, the present invention provides a molded case circuit breaker accessory installation structure, comprising:

[0006] The housing structure comprises a base, an upper cover and a receiving cavity formed between the base and the upper cover;

[0007] The contact assembly includes a movable contact rotatably disposed in the accommodating cavity, wherein the movable contact has a contact arm extending upward from the top of the upper cover;

[0008] The operating mechanism is detachably mounted on the top of the upper cover, and a rotating shaft structure connecting the operating mechanism and the contact arm is rotatably mounted on the top of the upper cover;

[0009] An accessory device is detachably arranged on the top of the upper cover and located on one side of the operating mechanism. The accessory device includes a first accessory carrier provided with a first accessory slot and a second accessory carrier provided with a second accessory slot. A push rod structure located on the motion path of the rotating shaft structure is rotatably arranged on the first accessory carrier. The operating mechanism includes a trip rod opposite to the second accessory carrier. A first accessory module that cooperates with the push rod structure is installed in the first accessory slot, and a second accessory module that cooperates with the trip rod is installed in the second accessory slot.

[0010] In the above-mentioned molded case circuit breaker accessory mounting structure, a first slot hole communicating with the first accessory slot is provided at the bottom of the first accessory carrier, and a driving portion is provided on the push rod structure opposite to the first slot hole above and below. The push rod structure drives the first accessory module to operate through the driving portion.

[0011] In the above-mentioned molded case circuit breaker accessory mounting structure, the push rod structure includes two connecting plates hingedly arranged on the side walls of both sides of the first accessory carrier, and a push rod member connected between the two connecting plates. The push rod member is rotatably located at the bottom of the first accessory carrier and cooperates with the rotating shaft structure.

[0012] In the above-mentioned molded case circuit breaker accessory mounting structure, the driving portion is a driving boss formed on the push rod member.

[0013] In the above-mentioned molded case circuit breaker accessory installation structure, the rotating shaft structure includes multiple crank arm structures respectively connecting the operating mechanism and the contact arm, and the push rod structure cooperates and abuts against one of the crank arm structures. The rotating shaft structure rotates to open and close the switch, thereby driving the push rod structure to rotate through the crank arm structure, thereby driving the first accessory module to operate.

[0014] In the above-mentioned molded case circuit breaker accessory installation structure, the first accessory module includes an auxiliary switch or auxiliary contact arranged in the first accessory slot.

[0015] In the above-mentioned molded case circuit breaker accessory mounting structure, the second accessory carrier is arranged adjacent to the first accessory carrier in front and back, and the end of the second accessory carrier away from the first accessory carrier is provided with a second slot hole connected to the second accessory slot, and the trip rod includes a trip plate opposite to the second slot hole.

[0016] In the above-mentioned molded case circuit breaker accessory installation structure, the second accessory module includes a shunt trip device arranged in the second accessory slot, and the shunt trip device has a shunt drive rod passing through the second slot hole for driving the trip rod to operate.

[0017] In the above-mentioned molded case circuit breaker accessory mounting structure, a plurality of fixing columns are provided between the accessory device and the top of the upper cover. The accessory device is fixed to the plurality of fixing columns by a fastening structure, and an accommodating space is formed between the accessory device and the top of the upper cover. The rotating shaft structure extends into the accommodating space and cooperates with the push rod structure.

[0018] The utility model also provides a molded case circuit breaker, comprising a housing, an arc extinguishing assembly, a contact assembly, a rotating shaft and an operating mechanism, and the molded case circuit breaker accessory mounting structure described in any one of the above items.

[0019] Compared with the existing technology, the technical solution of this utility model has the following advantages:

[0020] 1. In the accessory mounting structure of the molded case circuit breaker provided by the present invention, the operating mechanism and the rotating shaft structure are detachably mounted on the top of the upper cover, and the accessory device is detachably mounted on the top of the upper cover relative to the operating mechanism and the rotating shaft structure, and is used in conjunction with the rotating shaft structure and the tripping rod of the operating mechanism. This technical solution optimizes the position structure between the operating mechanism, the rotating shaft structure and the accessory device, which not only realizes the modular installation between the operating mechanism, the rotating shaft structure and the accessory device, but also facilitates and improves the installation and assembly, and can meet the installation requirements of different accessory modules on the accessory device. For example, the first accessory The accessory module is preferably an auxiliary switch installed in the first accessory slot of the accessory device, and is coordinated with the rotating shaft structure through the push rod structure, so that the rotating shaft structure drives the auxiliary switch to open or close when the opening and closing rotation is performed, and the working characteristics of the auxiliary switch are used to detect the opening and closing status of the circuit breaker, and the second accessory module is preferably a shunt trip device installed in the second accessory slot, and the circuit breaker can be remotely controlled to trip and open by cooperating with the trip rod. In this way, the coordination between the accessory device and the operating mechanism and the rotating shaft structure can be well achieved, which can better meet the different usage needs of users and enhance and expand the usage functions of the circuit breaker.

[0021] 2. In the accessory installation structure of the molded case circuit breaker provided by the present invention, the push rod structure is composed of two connecting plates and a push rod member, and a driving boss is formed on the push rod member to cooperate with and abut against one of the arm structures of the rotating shaft structure. This arrangement enables a transmission fit to be formed between the push rod structure and the rotating shaft structure. With this structural arrangement, the motion is transmitted between the rotating shaft structure and the first accessory module through the push rod structure. The first accessory module can select an auxiliary contact or auxiliary switch installed in the first accessory slot, and push the push rod member upward when the rotating shaft structure rotates to open the switch, so that the push rod member triggers the auxiliary switch or auxiliary contact to move through the driving boss. In this way, the auxiliary switch can be driven to realize the opening and closing action, and the function of detecting the opening and closing status of the circuit breaker can be realized through the auxiliary switch, and the auxiliary contact can also be driven to realize the switching control of multiple groups of normally open and normally closed contacts.

[0022] 3. In the accessory installation structure of the molded case circuit breaker provided by the present invention, a trip plate is provided according to the trip rod, which is opposite to the second slot on the second accessory carrier. The second accessory module selects a shunt trip device installed in the second accessory slot. This shunt control device can be used in conjunction with external devices such as a fire control room. When the shunt trip device receives an external electrical signal, it is triggered to act, and the shunt trip rod passes through the second slot and pushes against the trip plate, thereby driving the trip rod to rotate, causing the operating mechanism in the closed state to trip and open, and finally realizing the rapid tripping and opening of the circuit breaker to protect the safe operation of the line and equipment. By adopting this technical solution, the function of remotely controlling the circuit breaker to trip and open is realized through the cooperation of the shunt control device and the trip rod, thereby cooperating with the fire control to forcibly cut off the power supply to prevent secondary disasters caused by electrical accidents.

[0023] 4. In the molded case circuit breaker accessory mounting structure provided by the present invention, the accessory device is fixed to the top of the upper cover by multiple fixing columns, and an accommodating space is formed between the accessory device and the top of the upper cover. The accommodating space reserves position control for the rotating shaft structure, so that the rotating shaft structure together with one of the crank arm structures is extended and arranged in the accommodating space. This design avoids position interference between the accessory device and the rotating shaft structure, and at the same time enables the push rod structure to cooperate with the crank arm structure, thereby realizing transmission cooperation between the rotating shaft structure and the accessory device. The design is reasonable, the cooperation is reliable, and the structure is compact.

[0024] 5. In the molded case circuit breaker provided by the present invention, by providing an accessory device, the installation requirements of multiple accessory modules can be met at the same time, thereby realizing the integrated and modular installation of multiple accessory modules, simplifying the installation structure, saving installation space, making the structure more compact, and improving and expanding the product's usage functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the specific implementation or the description of the prior art.

[0026] Figure 1 This is a structural diagram of the accessory installation structure of a molded case circuit breaker of the present invention;

[0027] Figure 2 This is a schematic diagram of the connection structure of the accessory device, operating mechanism and rotating shaft structure of the present invention;

[0028] Figure 3 for Figure 2 A schematic structural diagram of the accessory device, operating mechanism and rotating shaft structure from another direction;

[0029] Figure 4 This is a schematic structural diagram of the accessory device of the present utility model;

[0030] Figure 5 This is a schematic diagram of the cross-sectional structure of the molded case circuit breaker of the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of the molded case circuit breaker of the present invention with the cover hidden.

[0032] Explanation of the accompanying drawings: 1. Shell; 11. Base; 12. Upper cover; 13. Cover; 14. Connection window; 15. Interphase slot; 4. Moving contact; 41. Contact arm; 5. Static contact; 6. Rotating shaft structure; 61. Crank arm structure; 62. Rotating shaft support plate; 7. Operating mechanism; 71. Mechanism bracket; 72. Lower connecting rod; 73. Tripping rod; 74. Tripping plate; 8. Controller; 9. Accessory device; 91. First accessory carrier; 92. Second accessory carrier; 93. Push rod structure; 931. Connecting plate; 932. Push rod member; 94. First accessory slot; 95. Second accessory slot; 96. Driving boss; 97. Fixing column; 98. First slot hole; 99. Second slot hole. DETAILED DESCRIPTION

[0033] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "first", "second" and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0035] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0036] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0037] Example 1

[0038] The present embodiment will be described in detail below with reference to the accompanying drawings:

[0039] This embodiment provides Figure 1-6 The illustrated embodiment of a molded case circuit breaker accessory mounting structure includes:

[0040] The housing 1 structure includes a base 11, an upper cover 12 and a cover shell, and an accommodating cavity formed between the base 11 and the upper cover 12;

[0041] The contact assembly includes a movable contact 4 rotatably disposed in the accommodating cavity and a stationary contact 5 disposed in the accommodating cavity and cooperating with the movable contact 4. The movable contact 4 has a contact arm 41 extending upward from the top of the upper cover 12.

[0042] The operating mechanism 7 is detachably mounted on the top of the upper cover 12. A rotating shaft structure 6 connecting the operating mechanism 7 and the contact arm 41 is rotatably mounted on the top of the upper cover 12. When the operating mechanism 7 drives the rotating shaft to rotate, the movable contact 4 is driven to close or open the circuit breaker, thereby driving the movable contact 4 to contact or separate from the static contact 5.

[0043] The accessory device 9 is detachably arranged on the top of the upper cover 12 and located on one side of the operating mechanism 7. The accessory device 9 includes a first accessory carrier 91 provided with a first accessory slot 94 and a second accessory carrier 92 provided with a second accessory slot 95. The first accessory carrier 91 is rotatably provided with a push rod structure 93 located on the motion path of the rotating shaft structure 6. The operating mechanism 7 includes a trip rod 73 opposite to the second accessory carrier 92. The first accessory slot 94 is provided with a first accessory module that cooperates with the push rod structure 93, and the second accessory slot 95 is provided with a second accessory module that cooperates with the trip rod 73.

[0044] In the above embodiment, according to the fact that the operating mechanism 7 and the rotating shaft structure 6 are detachably mounted on the top of the upper cover 12, and the moving contact 4 is detachably mounted in the accommodating cavity, the operating mechanism 7 and the moving contact 4 are connected through the rotating shaft structure 6, thereby realizing modular assembly between the operating mechanism 7, the rotating shaft structure 6 and the moving contact 4. In addition, the accessory device 9 is detachably mounted on the top of the upper cover 12 relative to the operating mechanism 7 and the rotating shaft structure 6, and is used in conjunction with the rotating shaft structure 6 and the tripping rod 73 of the operating mechanism 7. This technical solution reasonably optimizes the position structure between the operating mechanism 7, the rotating shaft structure 6 and the accessory device 9, not only realizing modular installation between the operating mechanism 7, the rotating shaft structure 6 and the accessory device 9, but also making the installation convenient and quick, and providing It has high installation and assembly capabilities, and can meet the installation requirements of different accessory modules on the accessory device 9. For example, the first accessory module is preferably an auxiliary switch installed in the first accessory slot 94 of the accessory device 9, and is coordinated with the shaft structure 6 through the push rod structure 93, so that the shaft structure 6 drives the auxiliary switch to open or close when the opening and closing rotation is performed, and the working characteristics of the auxiliary switch are used to detect the opening and closing status of the circuit breaker, and the second accessory module is preferably an shunt trip device installed in the second accessory slot, and by cooperating with the trip rod, the purpose of remotely controlling the tripping and opening of the circuit breaker can be achieved. In this way, the coordination between the accessory assembly, the operating mechanism and the shaft structure can be well achieved, which can better meet the different usage requirements of users and enhance and expand the usage functions of the circuit breaker.

[0045] The following combination Figure 1-4 The specific setting method of the accessory device is described in detail:

[0046] A first slot hole 98 communicating with the first accessory slot 94 is provided at the bottom of the first accessory carrier 91, and a driving portion is provided on the push rod structure 93, which is opposite to the first slot hole 98 in upper and lower directions. The push rod structure 93 drives the first accessory module to operate through the driving portion (the first accessory module is not shown in the accompanying drawings). In this embodiment, the first accessory module includes an auxiliary switch or auxiliary contact, etc. arranged in the first accessory slot 94, so that the button portion of the auxiliary switch is extended through the first slot hole 98 and opposite to the driving portion, or the contact rod portion of the auxiliary contact is extended through the first slot hole 98 and opposite to the driving portion. The user selects the corresponding accessory module according to usage needs, wherein the rotating shaft structure 6 includes a plurality of crank arm structures 61 respectively connecting the operating mechanism 7 and the contact arm 41, and the push rod structure 93 cooperates and abuts against one of the crank arm structures 61. The rotating shaft structure 6 rotates to open and close the switch, driving the push rod structure 93 to rotate through the crank arm structure 61, thereby driving the first accessory module to operate by the push rod structure 93. Obviously, two or more first accessory slots 94 can be set in the first accessory carrier 91, so that the installation requirements of at least two first accessory modules on the first accessory carrier 91 can be met at the same time, so that an auxiliary switch and an auxiliary contact can be installed at the same time, and the auxiliary contact and the auxiliary switch can be triggered respectively through the driving part of the push rod structure 93.

[0047] It is further preferred that the push rod structure 93 includes two connecting plates 931 hingedly arranged on the side walls of both sides of the first accessory carrier 91, and a push rod member 932 connected between the two connecting plates 931, and the driving portion is a driving boss 96 formed on the push rod member 932, and the push rod member 932 is rotated and located at the bottom of the first accessory carrier 91 and cooperates with the rotating shaft structure 6. This arrangement forms a transmission fit between the push rod structure 93 and the rotating shaft structure 6, which can well realize the fit between the first accessory module and the rotating shaft structure 6. This structural arrangement transmits motion between the rotating shaft structure 6 and the first accessory module through the push rod structure 93, and the first accessory module can be optionally installed The auxiliary contact or auxiliary switch in the first accessory slot 94, for example, the rotating shaft structure 6 drives the crank arm structure 61 to rotate toward the side close to the push rod structure 93 when the switch is opened, and pushes the push rod member 932 upward through the crank arm structure 61, so that the push rod member 932 triggers the auxiliary switch or auxiliary contact to move by driving the boss 96; correspondingly, the rotating shaft structure 6 drives the crank arm structure 61 to rotate toward the side away from the push rod structure 93 when the switch is closed. At this time, the push rod structure 93 can be reset with the help of the elastic force of the button of the auxiliary switch, and cooperate to rest on the crank arm structure 61, or a reset spring is provided on the push rod structure 93, and the automatic reset function of the push rod structure is realized by the action of the reset spring. It can be seen that the shaft structure 6 rotates according to the opening and closing conditions of the molded case circuit breaker. Through the transmission cooperation between the shaft structure 6 and the push rod structure 93, it can drive the auxiliary switch to realize the opening and closing action, thereby using the auxiliary switch to realize the function of detecting the opening and closing status of the circuit breaker, and can also drive the auxiliary contacts to realize the switching control of multiple groups of normally open and normally closed contacts, thereby improving the product usage function and meeting user needs.

[0048] Combine Figure 3-4As shown, the second accessory carrier 92 is arranged adjacent to the first accessory carrier 91 in front and back, and the end of the second accessory carrier 92 away from the first accessory carrier 91 is provided with a second slot 99 connected to the second accessory slot 95, and the trip rod 73 includes a trip plate 74 opposite to the second slot 99. According to the function of the trip rod 73, when it is driven to rotate, it will immediately trigger the operating mechanism 7 to perform a tripping and opening operation, so that the operating mechanism 7 switches from a closed state to a tripping and opening state, wherein the second accessory module includes a shunt tripping device arranged in the second accessory slot 95 (the second accessory module is not shown in the accompanying drawings), and the shunt tripping device is a shunt tripper and mainly includes a shunt coil and a shunt trip rod 73, etc. The shunt trip rod 73 passes through the second slot 99 to drive the trip rod 73 to operate. This shunt control device can be used in conjunction with external devices such as a fire control room. When the shunt trip device receives an external electrical signal, it is triggered to operate, and the shunt trip rod 73 passes through the second slot 99 and pushes against the trip plate 74, thereby driving the trip rod 73 to rotate, so that the operating mechanism 7 in the closed state trips and opens, and finally realizes the rapid tripping and opening of the circuit breaker to protect the safe operation of the line and equipment. By adopting this technical solution, the function of remotely controlling the circuit breaker to trip and open is realized through the cooperation of the shunt control device and the trip rod, thereby cooperating with the fire to forcibly cut off the power supply to prevent secondary disasters caused by electrical accidents.

[0049] like Figure 4 As shown, a plurality of fixing columns 97 are provided between the accessory device 9 and the top of the upper cover 12. The accessory device 9 is fixed on the plurality of fixing columns 97 by a fastening structure, and an accommodating space is formed between the accessory device 9 and the top of the upper cover 12. The rotating shaft structure 6 extends into the accommodating space and cooperates with the push rod structure 93. The accommodating space reserves position control for the rotating shaft structure 6, so that the rotating shaft structure 6 together with one of the crank arm structures 61 is extended and arranged in the accommodating space. This design avoids position interference between the accessory device 9 and the rotating shaft structure 6, and at the same time makes the push rod structure 93 cooperate and abut against the crank arm structure 61, thereby realizing the transmission cooperation between the rotating shaft structure and the first accessory module installed on the accessory device. The design is reasonable, the cooperation is reliable, and the structure is compact.

[0050] Example 2

[0051] This embodiment provides a molded case circuit breaker, combined with Figure 1 、 Figure 5-6As shown, it includes a shell 1, an arc extinguishing assembly, a contact assembly, a shaft structure 6, a controller 8 and an operating mechanism 7, as well as the molded case circuit breaker accessory installation structure described in Example 1. According to the accessory device 9 and the controller 8, they are detachably arranged on the top of the upper cover 12 and are separately arranged on both sides of the operating mechanism 7. The side panels on both sides of the operating mechanism 7 are relatively provided with shaft support plates 62 for rotatably connecting the shaft structure 6, so that the shaft structure 6 can be rotatably arranged between the operating mechanism 7 and the top of the upper cover 12. In addition, according to the molded case circuit breaker preferably adopts a three-phase line system, three interphase slots 15 are correspondingly arranged between the base 11 and the upper cover 12. The contact assembly includes three moving contacts 4 and three static contacts 5 arranged in the three interphase slots 15. The top of the upper cover 12 is provided with multiple connecting windows 14 corresponding to the multiple moving contacts 4, which are connected to the multiple interphase slots 15, so that the contacts of the moving contacts 4 The arm 41 extends out of the top of the upper cover 12 through the connecting window 14 and is connected to the rotating shaft structure 6. The rotating shaft structure 6 includes a plurality of crank arm structures 61 which are detachably connected to the operating mechanism 7 and the contact arm 41 respectively. The crank arm structure 61 is hinged to the lower connecting rod 72 and the contact arm 41 respectively through a pin structure, thereby realizing a quick and detachable connection between the rotating shaft structure 6 and the moving contact 4 and the operating mechanism 7. The molded case circuit breaker adopting this technical solution realizes the modularization and convenient installation effect between the operating mechanism 7, the rotating shaft structure 6, the moving contact 4 and the accessory device 9 through the reasonable optimization layout and design of the operating mechanism 7, the rotating shaft structure 6 and the moving contact 4, thereby simplifying the installation structure, reducing the installation difficulty, and being very convenient for product disassembly and maintenance, saving assembly time, improving assembly efficiency, reducing production costs, and being conducive to mass production and assembly of products, thereby enhancing the market competitiveness of products.

[0052] As a specific structural setting, the operating mechanism 7 includes a handle, a lever, an upper connecting rod, a lower connecting rod 72, a main tension spring, a tripping latch, a lock latch, a re-fastener and a tripping rod 73. The lever, tripping latch and lock latch are respectively rotatably arranged on the mechanism bracket 71. The handle is connected to the lever, one end of the upper connecting rod is rotatably arranged with the tripping latch, the lower connecting rod 72 is hinged to the upper connecting rod through a hinge shaft, the two ends of the main tension spring are respectively connected to the lever and the hinge shaft, the lock latch and the tripping latch remain locked when the operating mechanism 7 is in the closed state, and the operating mechanism is hingedly connected to the rotating shaft structure 6 through the lower connecting rod 72, so that the operating mechanism 7 controls the rotation of the rotating shaft; wherein, the tripping rod 73 cooperates with the tripping latch, and when the operating mechanism 7 is in the closed state, once the tripping rod 73 is triggered to rotate, it will trigger the operating mechanism 7 to perform the tripping and opening operation, so that the operating mechanism 7 is switched from the closed state to the tripping and opening state, thereby realizing the tripping and opening of the circuit breaker.

[0053] The molded case circuit breaker of this embodiment can simultaneously meet the installation requirements of multiple accessory modules by providing an accessory device, thereby realizing the integrated and modular installation of multiple accessory modules, simplifying the installation structure, saving installation space, making the structure more compact, and improving and expanding the product usage functions.

[0054] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A molded case circuit breaker accessory installation structure, characterized in that: include: The housing (1) structure comprises a base (11), an upper cover (12), and a receiving cavity formed between the base (11) and the upper cover (12); A contact assembly comprises a movable contact (4) rotatably arranged in an accommodating cavity, wherein the movable contact (4) has a contact arm (41) extending upward from the top of an upper cover (12); An operating mechanism (7) is detachably arranged on the top of the upper cover (12), and a rotating shaft structure (6) connecting the operating mechanism (7) and the contact arm (41) is rotatably arranged on the top of the upper cover (12); An accessory device (9) is detachably arranged on the top of the upper cover (12) and located on one side of the operating mechanism (7). The accessory device (9) includes a first accessory carrier (91) provided with a first accessory slot (94) and a second accessory carrier (92) provided with a second accessory slot (95). A push rod structure (93) located on the motion path of the rotating shaft structure (6) is rotatably arranged on the first accessory carrier (91). The operating mechanism (7) includes a trip rod (73) opposite to the second accessory carrier (92). A first accessory module that cooperates with the push rod structure (93) is installed in the first accessory slot (94), and a second accessory module that cooperates with the trip rod (73) is installed in the second accessory slot (95).

2. The molded case circuit breaker accessory mounting structure according to claim 1, characterized in that: The bottom of the first accessory carrier (91) is provided with a first slot hole (98) connected to the first accessory slot (94), and the push rod structure (93) is provided with a driving part opposite to the first slot hole (98) above and below. The push rod structure (93) drives the first accessory module to move through the driving part.

3. The molded case circuit breaker accessory mounting structure according to claim 2, characterized in that: The push rod structure (93) includes two connecting plates (931) hingedly arranged on the side walls of both sides of the first accessory carrier (91), and a push rod member (932) connected between the two connecting plates (931), and the push rod member (932) is rotatably located at the bottom of the first accessory carrier (91) and cooperates with the rotating shaft structure (6).

4. The molded case circuit breaker accessory mounting structure according to claim 3, characterized in that: The driving portion is a driving boss (96) formed on the push rod (932).

5. The molded case circuit breaker accessory mounting structure according to claim 2, characterized in that: The first accessory module includes an auxiliary switch or auxiliary contact disposed in the first accessory slot (94).

6. The molded case circuit breaker accessory mounting structure according to any one of claims 1 to 5, characterized in that: The rotating shaft structure (6) includes a plurality of crank arm structures (61) respectively connecting the operating mechanism (7) and the contact arm (41); the push rod structure (93) cooperates and abuts against one of the crank arm structures (61); the rotating shaft structure (6) drives the push rod structure (93) to rotate through the crank arm structure (61) when opening and closing the switch, thereby driving the first accessory module to operate through the push rod structure (93).

7. The molded case circuit breaker accessory mounting structure according to claim 1, characterized in that: The second accessory carrier (92) is arranged adjacent to the first accessory carrier (91) in front and back, and the end of the second accessory carrier (92) away from the first accessory carrier (91) is provided with a second slot hole (99) connected to the second accessory slot (95), and the tripping rod (73) includes a tripping plate (74) opposite to the second slot hole (99).

8. The molded case circuit breaker accessory mounting structure according to claim 7, characterized in that: The second accessory module includes a shunt tripping device arranged in the second accessory slot (95), and the shunt tripping device has a shunt driving rod passing through the second slot hole for driving the tripping rod (73) to operate.

9. The molded case circuit breaker accessory mounting structure according to claim 1, characterized in that: A plurality of fixing columns (97) are provided between the accessory device (9) and the top of the upper cover (12); the accessory device (9) is fixed to the plurality of fixing columns (97) by a fastening structure, and an accommodating space is formed between the accessory device (9) and the top of the upper cover (12); the rotating shaft structure (6) extends into the accommodating space and cooperates with the push rod structure (93).

10. A molded case circuit breaker, characterized in that: It comprises a housing (1), an arc extinguishing assembly, a contact assembly, a rotating shaft structure (6) and an operating mechanism (7), and a molded case circuit breaker accessory installation structure according to any one of claims 1 to 9.

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