Reclosing circuit breaker

Abstract

The reclosing circuit breaker comprises an electric operation mechanism and an operation mechanism, the electric operation mechanism is provided with an output gear and a connecting rod, one end of the connecting rod is connected with the output gear, and the connection position deviates from the rotation center of the output gear; wherein the operating mechanism comprises a handle, and the handle is made of engineering plastics; a driving column and a limiting part are integrally formed on the handle through injection molding; a linkage hole is formed in the other end of the connecting rod, the driving column is sleeved with the linkage hole, and along with rotation of the electrolytic bath mechanism, the connecting rod acts on the driving column through the hole wall of the linkage hole so as to drive the operating mechanism; the limiting part is positioned above the driving column so as to prevent the driving hole from being separated from matching with the driving column; the handle has the advantage that the handle is not prone to being broken down.

Description

Technical Field

[0001] This application relates to the field of low-voltage electrical appliances, specifically a reclosing circuit breaker. Background Technology

[0002] In the field of molded case circuit breakers, there is a type of circuit breaker with electric operation function called a reclosing circuit breaker. The one disclosed in CN107993902A is a classic example of a reclosing circuit breaker.

[0003] In this reclosing circuit breaker, its electric operating mechanism has an output gear (usually made of powder alloy, which is conductive), and a connecting rod (usually made of metal, which is conductive) on the output gear. The other end of the connecting rod pulls the handle assembly (part of the operating mechanism), thereby driving the operating mechanism by the electric operating mechanism.

[0004] In this patent, the connecting rod and handle assembly are connected as follows: the handle assembly includes a handle, a handle holder, and a riveting shaft. The handle clamp is fastened to the handle with screws, and the riveting shaft is riveted to both the handle clamp and the handle (the handle has a hole for one end of the riveting shaft to pass through). The exposed part of the riveting shaft is connected to the connecting rod. Although the patent does not explicitly describe the materials of the handle clamp, screws, and riveting shaft, disassembling the actual product of this patent reveals that these components are all metal (as can be seen from the attached drawings of the patent, these components are relatively thin, and only metal components can be used to ensure strength).

[0005] In this field, apart from the traction rod and handle, the other components of the operating mechanism, such as the frame, upper linkage, and lower linkage, are basically made of metal. Furthermore, the operating mechanism directly drives the moving contact assembly to rotate, so in certain situations, the operating mechanism may be electrified.

[0006] Reclosing circuit breakers rely entirely on the handle as an insulator to isolate the electric operating mechanism from the control mechanism, but this depends on the handle being resistant to breakdown. However, the aforementioned reclosing circuit breakers require relatively large holes in the handle for both the handle clamp and the riveting shaft installation. These holes inadvertently reduce the handle's insulation performance, making it more susceptible to breakdown. Furthermore, the use of conductive metal materials for the handle clamp and riveting shaft further exacerbates the risk of the handle being broken down, posing a safety hazard.

[0007] Therefore, it is essential to design a more reasonable connection structure between the electric control mechanism and the operating mechanism. Summary of the Invention

[0008] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and to provide a reclosing circuit breaker.

[0009] This application provides: a reclosing circuit breaker, comprising an electric operating mechanism and an operating mechanism. The electric operating mechanism has an output gear and a connecting rod, one end of which is connected to the output gear at a position offset from the rotation center of the output gear. The operating mechanism includes a handle made of engineering plastic. A drive column and a limiting part are integrally injection molded on the handle. A linkage hole is provided on the other end of the connecting rod, which is fitted onto the drive column. As the electric operating mechanism rotates, the connecting rod acts on the drive column through the wall of the linkage hole to drive the operating mechanism. The limiting part is located above the drive column to prevent the drive hole from disengaging from the drive column.

[0010] In some embodiments of this application, the cross-sectional shape of the linkage hole matches the cross-sectional shape of the limiting part, both being non-circular; the cross-sectional area of ​​the drive column is smaller than the cross-sectional area of ​​the linkage hole; the linkage hole and the limiting part are misaligned to prevent the drive hole from disengaging from the drive column.

[0011] In some embodiments of this application, the cross-sectional shape of the drive column is circular, and the cross-sectional shape of the linkage hole and the limiting part is oblong, elliptical, or polygonal.

[0012] In some embodiments of this application, the handle includes a main body portion, the size of which is larger than the linkage hole; a drive column is connected between the main body portion and the limiting portion, and the other end of the connecting rod is always located between the main body portion and the limiting portion.

[0013] In some embodiments of this application, the connecting rod portion is arc-shaped.

[0014] In some embodiments of this application, the electric operating mechanism includes a DC motor and a reduction gearbox; the reduction gearbox includes a housing and a transmission gear set located inside the housing; the output shaft of the DC motor passes through the housing and forms a transmission connection with the first gear of the transmission gear set, and the rotation direction of the DC motor is unidirectional; the output gear is rotatably disposed on the upper surface of the housing, and the output gear and the end gear of the transmission gear set are concentrically arranged and also form a transmission connection relationship.

[0015] In some embodiments of this application, a transmission column is also included. One end of the transmission column is located inside the housing and forms a transmission with the end gear. The other end of the transmission column extends out of the housing and forms a engagement with the output gear in the radial direction, thereby forming a transmission connection between the output gear and the transmission gear.

[0016] In some embodiments of this application, a manual drive shaft is also included. The manual drive shaft is rotatably connected to the upper surface of the housing. The manual drive shaft has a meshing gear that meshes with the output gear to achieve linkage between the manual drive shaft and the output gear. The output gear and the end gear are connected by a clutch structure. One end of the clutch structure is always connected to the output gear, and the other end of the clutch structure is only connected to the end gear in one rotational direction. When the output gear is driven to rotate manually, no transmission connection is formed between the end gear and the output gear.

[0017] In some embodiments of this application, the clutch structure includes a drive column, a drive pin, a return spring, and a drive groove formed on the end gear. One end of the drive column extends out of the housing and engages with the output gear in the radial direction. A pin hole is formed in the radial direction of the drive column, and the drive pin is slidably disposed in the pin hole. The return spring is connected to the drive pin to drive the drive pin to return to its original position after sliding. The drive groove includes an arc-shaped section and a straight edge section. One end of the arc-shaped section is connected to the straight edge section, and the connection point forms a groove. When the drive pin rotates away from the groove, it retracts into the pin hole on the arc-shaped section, so that the output gear and the end gear do not form a transmission connection. At this time, the return spring is compressed. When the drive pin rotates towards the groove, it extends out of the pin hole under the action of the return spring and abuts against the groove, so that the output gear and the end gear form a transmission connection.

[0018] In some embodiments of this application, a base, a middle cover, and a top cover are also included. The middle cover is fixed above the base, and the top cover is fixed above the middle cover. The top cover and the middle cover form an installation space, and the electric operating mechanism is fixed in the installation space. The middle cover has a semi-enclosed partition rib, and the handle is swingable and is located in the semi-enclosed partition rib when swinging in one direction. A first circuit board is also provided inside the middle cover, and the first circuit board is separated from the handle by the partition rib.

[0019] The advantages of this application compared to the prior art are:

[0020] This structure replaces the metal components such as the handle frame, riveting shaft, and screws in existing technologies with a drive column and limiting part integrally injection-molded with the handle. This design provides sufficient insulation for the handle, preventing damage to the electric operating mechanism caused by a high current flowing into it due to a puncture. Secondly, the structure has very few components, simplifying assembly. Finally, the limiting part ensures a stable connection between the linkage and the handle, resulting in a simple and stable structure. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A perspective view of a reclosing circuit breaker according to an embodiment of this application is shown;

[0023] Figure 2 This diagram shows a reclosing circuit breaker after the top cover has been removed according to an embodiment of this application.

[0024] Figure 3 This paper shows an installation diagram of the motor, reduction gearbox, output gear, and manual drive shaft in the reclosing circuit breaker according to an embodiment of this application.

[0025] Figure 4 A schematic diagram of the installation of the motor and reduction gearbox in the reclosing circuit breaker according to an embodiment of this application is shown;

[0026] Figure 5 This paper shows an internal schematic diagram of the reduction gearbox in the reclosing circuit breaker according to an embodiment of the present application;

[0027] Figure 6 The diagram shows the installation sequence of the connecting rod and handle in the reclosing circuit breaker according to an embodiment of this application;

[0028] Figure 7 A schematic diagram of the clutch structure in the reclosing circuit breaker according to an embodiment of this application is shown;

[0029] Figure 8 This diagram illustrates the final gear of the reclosing circuit breaker in an embodiment of this application rotating in a first direction.

[0030] Figure 9 A schematic diagram is shown of the output gear (drive column) rotating in a first direction in the reclosing circuit breaker according to an embodiment of this application. Detailed Implementation

[0031] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0032] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. Example

[0036] like Figure 1-9 As shown, an embodiment of this application is a reclosing circuit breaker.

[0037] This circuit breaker includes an upper cover 100, a base 200, a middle cover 300, a moving contact assembly, an arc-extinguishing chamber, an operating mechanism, an electric operating mechanism 400, a circuit board assembly, etc.

[0038] The top cover 100 is fixed to the middle cover 300, and the middle cover 300 is fixed to the base 200. All of these are fixed by screws.

[0039] The middle cover 300 and the base 200 are fixed together, forming a first space. This first space is used to accommodate the stationary contact, the arc-extinguishing chamber, the operating mechanism, and the moving contact assembly. The middle cover 300 has an installation space S1, which is separated from the first space by a partition wall. The handle 600 of the operating mechanism passes through the partition wall and is located within the installation space S1.

[0040] The electric operating mechanism 400 is fixed in the mounting space S1. There are various fixing methods, such as being clipped into the mounting space S1 or fixed to the middle cover 300 with screws. Here, a semi-enclosed partition rib 302 extends from the partition wall. This semi-enclosed partition rib 302 surrounds part of the movement trajectory of the handle 600. Specifically, when the handle 600 swings upward, it is within the semi-enclosed partition rib 302. The semi-enclosed partition rib 302 forms a U-shape. The first circuit board 500 in the circuit board assembly is separated from the handle 600 by this semi-enclosed partition rib 302. The purpose of this semi-enclosed partition rib 302 is that, since the handle 600 is moving, the gap between it and the middle cover 300 may allow strong current from below to surge upwards; the partition rib 302 provides a certain degree of protection. Of course, the shape of the semi-enclosed partition rib 302 can also be other forms, such as L-shaped, mainly designed according to the shape of the first circuit board 500.

[0041] Here, the operating mechanism includes handle 600, frame, lever, upper link, lower link, jumper, lock, re-lock, main tension spring, traction rod, etc. The connection and transmission relationship of these components are common knowledge in this field and will not be described in detail here.

[0042] The moving contact assembly includes a rotating shaft and a moving contact. The rotating shaft is rotatably connected to the base 200 and is connected to the lower connecting rod 402. In this way, the rotating shaft can be driven to rotate under the action of the operating mechanism, thereby realizing the rotation of the moving contact.

[0043] The stationary contact is fixed on the base 200. The rotation of the moving contact causes the moving contact to contact and separate from the stationary contact, thereby realizing the connection and disconnection of the circuit breaker.

[0044] The electric operating mechanism 400 includes an output gear 401 and a connecting rod 402. The connecting rod 402 includes a first end and a second end. The first end is fixed at an eccentric position on the output gear 401, and the second end is connected to the handle 600. In this way, the rotation of the output gear 401 can drive the connecting rod 402 to move, thereby pulling the handle 600 to perform the opening and closing operation.

[0045] Here, the handle 600, located at one end of the mounting space S1, has a drive post 602 and a limiting part 601, which are integrally injection molded with the handle 600. The entire handle 600 is made of insulating material, specifically engineering plastic, possessing good strength. The second end of the connecting rod 402 has a linkage hole 402a, which is fitted onto the drive post 602. The limiting part 601 blocks the top of the linkage hole 402a, thus preventing the linkage hole 402a from detaching from the drive post 602 and ensuring stable assembly between the connecting rod 402 and the handle 600. During transmission, the wall of the linkage hole 402a acts on the drive post 602 to drive the operating mechanism.

[0046] This structure, utilizing a drive column 602 integrally injection-molded with the handle 600 and a limiting part 601, replaces the metal components such as the handle 600 frame, riveting shaft, and screws found in existing technologies. This structure provides sufficient insulation for the handle 600, preventing damage to the electric operating mechanism 400 caused by a high current flowing into it due to a breakdown. Secondly, the structure has very few components, simplifying assembly. Finally, the limiting part 601 ensures a stable connection between the connecting rod 402 and the handle 600, resulting in a simple and stable structure.

[0047] To simplify the assembly structure, the cross-sectional shape of the linkage hole 402a matches the cross-sectional shape of the limiting part 601; both are non-circular. The cross-sectional area of ​​the drive column 602 is smaller than that of the linkage hole 402a. By matching the cross-sectional shape of the linkage hole 402a with that of the limiting part 601, during component assembly, the linkage hole 402a can pass through the limiting part 601 until it is fitted around the periphery of the drive column 602. Then, the handle 600 and the connecting rod 402 are rotated relative to each other, resulting in a final misalignment (installation process as follows). Figure 6 (As shown). This method utilizes the limiting part 601 to complete the assembly, and also utilizes the misalignment between the limiting part 601 and the linkage hole 402a (here, misalignment means that the shapes are misaligned, for example, if both are long waist-shaped holes, the misalignment means that the length directions of the two long waist-shaped holes are intersecting), to prevent the drive hole from disengaging from the drive column 602. This structure is very simple and easy to process.

[0048] Here, the shape of the drive column 602 can be chosen from many options. As a preferred option, a circular cross-sectional shape is used here, but it can also be a square, rectangle, etc. Similarly, the shapes of the linkage hole 402a and the limiting part 601 can also be chosen from many options. Here, the cross-sectional shape of the linkage hole 402a and the limiting part 601 is oblong, but it can also be elliptical or polygonal, etc. In any case, as long as the cross-sectional area of ​​the drive column 602 is smaller than the cross-sectional area of ​​the linkage hole 402a, and the handle 600 and the connecting rod 402 can be misaligned after installation, it is acceptable.

[0049] Here, the handle 600 also has a main body 603, which is fixed to the lever. The drive column 602 is connected between the main body 603 and the limiting part 601. In any case, the other end of the connecting rod 402 is always located between the main body 603 and the limiting part 601.

[0050] As a preferred design approach, the connecting rod 402 is partially curved, which allows it to avoid some components compared to a straight connecting rod 402.

[0051] For the electric operating mechanism 400, there are many options; it can be an AC motor solution or a DC motor solution 403.

[0052] The solution for DC motor 403 includes DC motor 403 and reduction gearbox 404.

[0053] The reduction gearbox 404 includes a housing 4040 and a transmission gear set.

[0054] Here, the transmission gear set is located inside the housing 4040. The transmission gear set includes a first gear 4041, a second gear 4042, a third gear 4043, a fourth gear 4044, and a final gear 4045. The first gear 4041 is fixed to the output shaft of the DC motor 403, meaning the output shaft of the DC motor 403 passes through the housing 4040 and engages with it, allowing the motor's output shaft to drive the first gear 4041 to rotate. The second gear 4042, third gear 4043, and fourth gear 4044 are all double-toothed. The large tooth of the second gear 4042 meshes with the first gear 4041, and the small tooth of the second gear 4042 meshes with the large tooth of the second gear 4042. The small tooth of the second gear 4042 meshes with the large tooth of the third gear 4043, the small tooth of the third gear 4043 meshes with the large tooth of the fourth gear 4044, and the small tooth of the fourth gear 4044 meshes with the final gear 4045. The end gear 4045 and the output gear 401 form a transmission relationship. Here, the output gear 401 is rotatably mounted on the upper surface of the housing 4040, and it is concentrically arranged with the end gear 4045 to form a transmission connection.

[0055] This structure allows the torque of the DC motor 403 to be reduced to suit the operation of the operating mechanism. Furthermore, the DC motor 403 features unidirectional rotation and a relatively high speed, enabling rapid electric closing and opening operations. Simultaneously, the output gear 401 is rotatably mounted on the surface of the housing 4040, which facilitates the formation of a small module for the electric operating mechanism 400, making it convenient to install the output gear 401. Secondly, the output gear 401 and the end gear 4045 are concentrically arranged, allowing for a designed transmission ratio for the output gear 401 (which will be the same as that of the end gear 4045).

[0056] There are many ways to achieve transmission between the two gears, and this is one of them. A transmission pin 4046 is used to form a transmission. One end of the transmission pin 4046 is located inside the housing 4040 and forms a transmission with the end gear 4045 (also a radial engagement). The other end protrudes and forms a radial engagement with the output gear 401 (actually a non-circular protrusion; the output gear 401 has a matching hole, and the two form an engagement). This achieves the transmission connection between the output gear 401 and the transmission gear. Here, the radial direction can be understood as the direction perpendicular to the rotation axis of both gears.

[0057] To enable manual operation of the reclosing circuit breaker, there is a transmission relationship between the manual drive shaft 405 and the output gear 401.

[0058] Specifically, the manual drive shaft 405 is rotatably connected to the upper surface of the housing 4040 (this can be achieved using a locating pin). The manual drive shaft 405 has a meshing gear that meshes with the output gear 401 to achieve linkage between the manual drive shaft 405 and the output gear 401. Here, the meshing gear and the manual drive shaft 405 are integrally formed; of course, they can also be separately formed and then fastened using riveting or screws.

[0059] Here, the upper end of the manual drive shaft 405 has a tool slot (internal hexagonal slot), and the upper cover 100 has a through hole that matches the tool slot, so that the user can insert a wrench into the tool slot for operation.

[0060] To reduce the force required for manual operation, the output gear 401 and the end gear 4045 are connected by a clutch mechanism. One end of the clutch mechanism is always connected to the output gear 401, while the other end is only connected to the end gear 4045 in one rotational direction. Thus, when the output gear 401 is manually driven to rotate, no transmission connection is formed between the end gear 4045 and the output gear 401.

[0061] As one type of clutch structure, a transmission pin 4047, a return spring 4048, and a transmission groove 4049 opened on the end gear 4045 are added to the upper transmission column 4046.

[0062] The transmission groove 4049 includes an arc-shaped segment 4049a and a straight-edge segment 4049b. One end of the arc-shaped segment 4049a is connected to the straight-edge segment 4049b, and the connection point forms a slot 4049c. Here, both the arc-shaped segment 4049a and the straight-edge segment 4049b are two segments connected sequentially at intervals, therefore, there are two slots 4049c.

[0063] One end of the transmission column 4046 extends out of the housing 4040 and engages radially with the output gear 401 (as described above, it will not be repeated here). The other end of the transmission column 4046 passes into the transmission groove 4049, and a pin hole 4046a (blind hole) is provided on the inserted part. The transmission pin 4047 is slidably disposed in the pin hole. The return spring 4048 is a compression spring, with one end abutting against the transmission pin 4047 and the other end abutting against the bottom of the pin hole 4046a.

[0064] by Figure 8 For example, during electric operation, the end gear 4045 rotates in the first direction F1, and the transmission pin 4047 moves towards the slot 4049c, abutting against the slot 4049c under the action of the return spring 4048. Therefore, the output gear 401, the clutch structure, and the end gear 4045 can form a transmission connection, thus electric operation can drive the operating mechanism to move.

[0065] by Figure 9 For example, during manual operation, the output gear 401 (transmission pin 4046) rotates in the first direction F1. The transmission pin 4047 only slips on the arc-shaped section 4049a, retracting into the pin hole 4046a and not engaging in the slot 4049c, thus preventing the end gear 4045 from forming a transmission connection with the clutch structure. At this time, although manual operation can move the operating mechanism, it will not rotate the gears inside the gearbox, thereby reducing the operating force required for manual operation.

[0066] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0067] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A reclosing circuit breaker, comprising an electric operating mechanism and an operating mechanism, wherein the electric operating mechanism has an output gear and a connecting rod, one end of the connecting rod being connected to the output gear, the connection position being offset from the rotation center of the output gear; characterized in that: The operating mechanism includes a handle made of engineering plastic; the handle has an integrally injection-molded drive column and a limiting part; the other end of the connecting rod is provided with a linkage hole, which is fitted onto the drive column. As the electric slot mechanism rotates, the connecting rod acts on the drive column through the hole wall of the linkage hole to drive the operating mechanism; the limiting part is located above the drive column to prevent the drive hole from disengaging from the drive column.

2. A reclosing circuit breaker according to claim 1, characterized in that: The cross-sectional shape of the linkage hole matches the cross-sectional shape of the limiting part, both being non-circular; the cross-sectional area of ​​the drive column is smaller than the cross-sectional area of ​​the linkage hole; the linkage hole and the limiting part are misaligned to prevent the drive hole from disengaging from the drive column.

3. A reclosing circuit breaker according to claim 2, characterized in that: The drive column has a circular cross-sectional shape, while the linkage hole and the limiting part have an elongated, elliptical, or polygonal cross-sectional shape.

4. A reclosing circuit breaker according to claim 1, characterized in that: The handle includes a main body, the size of which is larger than the linkage hole; a drive column is connected between the main body and the limiting part, and the other end of the connecting rod is always located between the main body and the limiting part.

5. A reclosing circuit breaker according to claim 1, characterized in that: The connecting rod portion is arc-shaped.

6. A reclosing circuit breaker according to claim 1, characterized in that: The electric operating mechanism includes a DC motor and a reduction gearbox; the reduction gearbox includes a housing and a transmission gear set located inside the housing; the output shaft of the DC motor passes through the housing and forms a transmission connection with the first gear of the transmission gear set, and the DC motor rotates in a single direction; the output gear is rotatably mounted on the upper surface of the housing, and the output gear and the end gear of the transmission gear set are concentrically arranged and also form a transmission connection between them.

7. A reclosing circuit breaker according to claim 6, characterized in that: It also includes a transmission column, one end of which is located inside the housing and forms a transmission with the end gear, and the other end of which extends out of the housing and forms a engagement with the output gear in the radial direction, thereby forming a transmission connection between the output gear and the transmission gear.

8. A reclosing circuit breaker according to claim 6, characterized in that: It also includes a manual drive shaft, which is rotatably connected to the upper surface of the housing. The manual drive shaft has a meshing gear that meshes with the output gear to achieve linkage between the manual drive shaft and the output gear. The output gear and the end gear are connected by a clutch structure. One end of the clutch structure is always connected to the output gear, while the other end of the clutch structure is only connected to the end gear in one rotational direction. When the output gear is driven to rotate manually, no transmission connection is formed between the end gear and the output gear.

9. A reclosing circuit breaker according to claim 8, characterized in that: The clutch structure includes a drive column, a drive pin, a return spring, and a drive groove on the end gear. One end of the drive column extends out of the housing and engages with the output gear in the radial direction. A pin hole is provided in the radial direction of the drive column, and the drive pin is slidably disposed in the pin hole. The return spring is connected to the drive pin to reset the drive pin after sliding. The drive groove includes an arc-shaped section and a straight edge section. One end of the arc-shaped section is connected to the straight edge section, and the connection point forms a groove. When the drive pin rotates away from the groove, it retracts into the pin hole on the arc-shaped section, preventing the output gear from forming a transmission connection with the end gear. At this time, the return spring is compressed. When the drive pin rotates towards the groove, it extends out of the pin hole under the action of the return spring and abuts against the groove, thus forming a transmission connection between the output gear and the end gear.

10. A reclosing circuit breaker according to claim 1, characterized in that: It also includes a base, a middle cover, and a top cover. The middle cover is fixed above the base, and the top cover is fixed above the middle cover. The top cover and the middle cover form an installation space, and the electric operating mechanism is fixed in the installation space. The middle cover has a semi-enclosed partition rib, and the handle is swingable and is located in the semi-enclosed partition rib when it swings in one direction. A first circuit board is also provided inside the middle cover, and the first circuit board is separated from the handle by the partition rib.

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