Interlock device for circuit breaker and circuit breaker

Abstract

This utility model belongs to the field of medium and high voltage electrical equipment technology, and discloses an interlocking device for a circuit breaker and a circuit breaker itself. The interlocking device includes a closing interlocking mechanism, which comprises a first transmission component, a first interlocking unit, and a second interlocking unit. The first transmission component is driven by the circuit breaker's propulsion mechanism. The first interlocking unit is mounted on the first transmission component and connected to the circuit breaker's closing bend. The second interlocking unit is mounted on the first transmission component. If the circuit breaker is in the open state, the propulsion mechanism drives the first transmission component to move the first and second interlocking units, causing the first interlocking unit to push the closing bend to its idle position and locking the second interlocking unit with the closing crank arm. If the circuit breaker is in the closed state, the closing bend drives the first interlocking unit to lock the propulsion mechanism, thus preventing the propulsion mechanism from being rocked. This interlocking device for the circuit breaker has a simple structure and occupies little space.

Description

Technical Field

[0001] This utility model relates to the field of medium and high voltage electrical technology, and in particular to an interlocking device for a circuit breaker and a circuit breaker. Background Technology

[0002] According to relevant standards for power systems, medium and high voltage switchgear must have "five protections" functions, namely, the vacuum circuit breakers in the switchgear must be equipped with relevant interlocking mechanisms, otherwise serious accidents may easily occur due to user misoperation.

[0003] The existing handcart-type circuit breakers have large components such as closing interlocking and emergency tripping interlocking, with many parts. The installation area inside the circuit breaker is also small, which makes it impossible for production personnel to pre-install the interlocking components. They need to install them in the order of parts in a small space, which is extremely inconvenient and inefficient. It also affects the safety of the workers to some extent.

[0004] Therefore, there is an urgent need to propose an interlocking device and a circuit breaker to solve the above-mentioned technical problems. Utility Model Content

[0005] According to one aspect of the present invention, the present invention provides an interlocking device for a circuit breaker, which has a simple structure, occupies little space, and can be pre-assembled before being assembled into the circuit breaker, thereby improving the assembly efficiency of the circuit breaker and facilitating subsequent maintenance.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The interlocking device of the circuit breaker includes the closing interlocking mechanism;

[0008] The closing interlocking mechanism includes a first transmission component, a first interlocking unit, and a second interlocking unit. The first transmission component is connected to the propulsion mechanism of the circuit breaker. The first interlocking unit is mounted on the first transmission component and connected to the closing bend of the circuit breaker. The second interlocking unit is mounted on the first transmission component and is used to cooperate with the closing crank arm of the circuit breaker.

[0009] If the circuit breaker is in the open state, when the propulsion mechanism is rocked, it can drive the first transmission member to move the first interlocking unit and the second interlocking unit, so that the first interlocking unit pushes the closing bend plate to the empty stroke position, and at the same time locks the second interlocking unit with the closing crank arm; if the circuit breaker is in the closed state, the closing bend plate drives the first interlocking unit to drive the first transmission member to lock the propulsion mechanism.

[0010] Optionally, the first interlocking unit includes:

[0011] The first mounting bracket is mounted on the first transmission component;

[0012] The first connecting shaft has one end slidably connected to the first mounting bracket;

[0013] The first adapter plate connects the other end of the first connecting shaft and the closing bend plate;

[0014] The first elastic element is configured to have a tendency to drive the first connecting shaft away from the first mounting bracket.

[0015] Optionally, the second interlocking unit includes a connecting part and a limiting part connected to the connecting part. The connecting part is mounted on the first transmission member, and the limiting part is provided with a limiting groove for engaging with the closing crank arm to limit the rotation of the closing crank arm.

[0016] Optionally, one side of the connecting portion is bent to form the limiting portion, and the limiting portion is provided with a bending rib on the side opposite to the limiting groove.

[0017] Optionally, the first interlocking unit includes a first mounting bracket, and the second interlocking unit includes a connecting portion. Fasteners are passed through the first transmission member, the connecting portion, and the first mounting bracket to connect the first transmission member, the connecting portion, and the first mounting bracket together.

[0018] Optionally, the first transmission component includes a first vertical section, a bent section, and a second vertical section connected in sequence. The end of the first vertical section is provided with a mounting plate, which is movably connected to the interlocking bent plate of the propulsion mechanism. The end of the second vertical section is equipped with the first interlocking unit and the second interlocking unit.

[0019] Optionally, the closing interlocking mechanism further includes a second mounting bracket, which is mounted on the propulsion mechanism, and the first transmission member is slidably connected to the second mounting bracket.

[0020] Optionally, the interlocking device of the circuit breaker further includes an emergency tripping interlocking mechanism, which includes:

[0021] The third mounting bracket is installed on the housing of the circuit breaker;

[0022] The second transmission component is slidably connected to the third mounting bracket and one end is connected to the propulsion mechanism in a transmission manner.

[0023] The second adapter plate is connected at one end to the second transmission component;

[0024] The second connecting shaft is rotatably connected to the third mounting bracket, and one end of the second connecting shaft is connected to the second adapter plate;

[0025] A pressure plate is installed at the end of the second connecting shaft away from the second adapter plate. When the circuit breaker is in the emergency tripping state, the propulsion mechanism drives the second transmission component to rotate the second connecting shaft through the second adapter plate, so that the pressure plate presses against the tripping plate of the circuit breaker.

[0026] The second elastic element is configured to have a tendency to drive the second connecting shaft to move the pressure plate away from the gate plate.

[0027] Optionally, the third mounting bracket includes a first frame and a second frame that are detachably connected. The second transmission component is a transmission shaft that slides through the first frame. The end of the transmission shaft passes through the second adapter plate and is connected to a limiting pin. The second elastic component is sleeved on the transmission shaft. One end of the second elastic component abuts against the first frame and the other end abuts against the second adapter plate. The second connecting shaft is rotatably connected to the second frame.

[0028] According to another aspect of the present invention, the present invention also provides a circuit breaker, including a circuit breaker body, a propulsion mechanism, and an interlocking device for the circuit breaker as described in any of the above technical solutions. The circuit breaker body includes a closing bend and a closing crank arm, and the interlocking device of the circuit breaker cooperates with the closing bend and the closing crank arm through the propulsion mechanism.

[0029] The beneficial effects of this utility model are:

[0030] This utility model provides an interlocking device for a circuit breaker, including a closing interlocking mechanism. The closing interlocking mechanism includes a first transmission member, a first interlocking unit, and a second interlocking unit. This closing interlocking mechanism cooperates with the circuit breaker's propulsion mechanism. When the propulsion mechanism is rocked (i.e., when the chassis is rocked), it drives the first transmission member to move the first and second interlocking units. This causes the first interlocking unit to push the closing bend plate to its idle position and locks the second interlocking unit with the closing crank arm, preventing the circuit breaker from closing. This achieves the interlocking mechanism that prevents the circuit breaker from closing when the chassis is rocked. Furthermore, the dual limitation on circuit breaker closing by the first and second interlocking units provides better interlocking reliability. When the circuit breaker is in the closed state, the closing bend plate drives the first interlocking unit to lock the propulsion mechanism, restricting its rocking and thus preventing the chassis from being rocked when the circuit breaker is closed. This closing interlocking mechanism simplifies the component structure and occupies less space while ensuring the reliability of the closing interlocking function, which helps to improve the structural compactness of the circuit breaker.

[0031] During the assembly of the circuit breaker, the closing interlocking mechanism can be pre-assembled first, and then moved as a whole to the circuit breaker. The first transmission component is connected to the propulsion mechanism, and the first interlocking unit is connected to the closing bend plate to complete the assembly. The assembly difficulty is low. Compared with the existing technology of assembling interlocking components one by one, it greatly shortens the assembly time for workers in the confined space of the circuit breaker and improves the safety of workers.

[0032] This utility model also provides a circuit breaker, including a circuit breaker body, a propulsion mechanism, and the aforementioned circuit breaker interlocking device. Because this circuit breaker employs the aforementioned circuit breaker interlocking device, its closing interlocking reliability is better, and its production efficiency is higher. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0034] Figure 1 This is an assembly diagram of the interlocking device and the circuit breaker from one perspective provided in this embodiment of the utility model.

[0035] Figure 2 This is a schematic diagram of the closing interlocking mechanism from one perspective provided in an embodiment of the present utility model;

[0036] Figure 3 This is a schematic diagram of the closing interlocking mechanism from another perspective provided by an embodiment of this utility model;

[0037] Figure 4 yes Figure 1 Enlarged view at point A;

[0038] Figure 5 yes Figure 1 A partial schematic diagram with the closing crank arm hidden;

[0039] Figure 6 This is a schematic diagram of the emergency tripping interlocking mechanism provided in this embodiment of the utility model;

[0040] Figure 7 This is an assembly diagram of the interlocking device and the circuit breaker from another perspective provided by this utility model embodiment;

[0041] Figure 8 yes Figure 7 Enlarged view at point B.

[0042] In the picture:

[0043] 10. Circuit breaker body; 11. Closing bend; 12. Closing crank arm; 13. Opening plate; 20. Propulsion mechanism;

[0044] 100. Closing interlocking mechanism; 110. First transmission component; 111. First vertical section; 112. Bending section; 113. Second vertical section; 120. First interlocking unit; 121. First mounting bracket; 122. First connecting shaft; 1221. Connector; 123. First adapter plate; 124. First elastic element; 125. Pin; 130. Second interlocking unit; 131. Connecting part; 132. Limiting part; 1321. Limiting groove; 1322. Bending rib; 140. Fastener; 150. Mounting plate; 151. Elongated hole; 160. Second mounting bracket;

[0045] 200. Emergency tripping interlock mechanism; 210. Third mounting bracket; 211. First frame; 212. Second frame; 220. Second transmission component; 230. Second connecting shaft; 240. Second adapter plate; 250. Pressure plate; 260. Second elastic component; 270. Limit pin. Detailed Implementation

[0046] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0047] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 utility model based on the specific circumstances.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0050] Example 1

[0051] This embodiment provides an interlocking device for a circuit breaker, which has a simple structure, occupies little space, and can be pre-assembled before being assembled into the circuit breaker, thereby improving the assembly efficiency of the circuit breaker and facilitating subsequent maintenance.

[0052] Optionally, in one possible embodiment, the interlocking device of the circuit breaker is used for a handcart-type circuit breaker. For example... Figure 1 As shown, the circuit breaker includes a circuit breaker body 10, a chassis, and a propulsion mechanism 20. The propulsion mechanism 20 is used for rocking the chassis in and out. The circuit breaker's interlocking device includes a closing interlocking mechanism 100, which is used to achieve interlocking between the circuit breaker and the chassis, i.e., preventing the chassis from being rocked when the circuit breaker is closed, and preventing the circuit breaker from closing when the chassis is rocked.

[0053] It is worth noting that the structure and working principle of the chassis and propulsion mechanism 20 in the handcart-type circuit breaker are existing technologies, therefore, their specific structure and working principle will not be described in detail.

[0054] Specifically, such as Figures 2-5 As shown, the closing interlocking mechanism 100 includes a first transmission component 110, a first interlocking unit 120, and a second interlocking unit 130.

[0055] The first transmission component 110 is connected to the propulsion mechanism 20 of the circuit breaker, the first interlocking unit 120 is installed on the first transmission component 110 and connected to the closing bend 11 of the circuit breaker, and the second interlocking unit 130 is installed on the first transmission component 110 and is used to cooperate with the closing crank arm 12 of the circuit breaker.

[0056] If the circuit breaker is in the open state, and the chassis is rocked, the propulsion mechanism 20 can drive the first transmission component 110 to move the first interlocking unit 120 and the second interlocking unit 130. This causes the first interlocking unit 120 to push the closing bend plate 11 to the empty travel position and locks the second interlocking unit 130 with the closing crank arm 12, thereby preventing the circuit breaker from closing. This achieves the interlock that prevents the circuit breaker from closing when the chassis is rocked.

[0057] If the circuit breaker is in the closed state, the closing bend 11 will drive the first interlocking unit 120 to drive the first transmission component 110 to lock the propulsion mechanism 20, thereby restricting the propulsion mechanism 20 from being rocked. This achieves the interlocking that prevents the chassis from being rocked when the circuit breaker is closed.

[0058] The closing interlocking mechanism 100 simplifies the component structure while ensuring reliable closing interlocking function, making it easier to operate and reducing space occupation, thus improving the structural compactness of the circuit breaker. Furthermore, during circuit breaker assembly, the closing interlocking mechanism 100 can be pre-assembled and then moved onto the circuit breaker as a whole. The first transmission component 110 is connected to the propulsion mechanism 20, and the first interlocking unit 120 is connected to the closing bend plate 11 to complete the assembly. This reduces assembly difficulty and significantly shortens the assembly time for workers in the confined space of the circuit breaker compared to the existing method of assembling interlocking components one by one, improving worker safety. In addition, the first interlocking unit 120 and the second interlocking unit 130 form a dual constraint on circuit breaker closing, resulting in superior interlocking reliability.

[0059] It is understandable that when the closing bend plate 11 moves to the idle travel position, the closing coil cannot affect the linkage device after it is activated, thus achieving the purpose of closing interlocking.

[0060] Optionally, see [link to relevant documentation] Figures 2-5 In one possible embodiment, the first interlocking unit 120 includes a first mounting bracket 121, a first connecting shaft 122, a first adapter plate 123, and a first elastic element 124. The first mounting bracket 121 is mounted on the first transmission member 110. One end of the first connecting shaft 122 is slidably connected to the first mounting bracket 121. The first adapter plate 123 connects the other end of the first connecting shaft 122 to the closing bend plate 11. The first elastic element 124 is configured to have a tendency to drive the first connecting shaft 122 away from the first mounting bracket 121.

[0061] The working principle of the first interlocking unit 120 is as follows:

[0062] When the chassis is rocked, the propulsion mechanism 20 drives the first transmission component 110 to move the first mounting frame 121 upward. The upward movement of the first mounting frame 121 drives the first connecting shaft 122 connected to it to move upward. The upward movement of the first connecting shaft 122 drives the first adapter plate 123 connected to it to move upward. The upward movement of the first adapter plate 123 drives the closing bend plate 11 connected to it to move to the empty stroke position. It is worth noting that in this embodiment, the distance that the first transmission component 110 drives the first mounting frame 121 to rise is greater than the distance that the closing bend plate 11 needs to be pushed to move to the empty stroke position. Therefore, in this process, after the first connecting shaft 122 pushes the closing bend plate 11 to the empty stroke position, as the first transmission component 110 drives the first mounting frame 121 to continue to rise, the first connecting shaft 122 will gradually slide into the first mounting frame 121 and compress the first elastic member 124. This configuration ensures that the first interlocking unit 120 will push the closing bend 11 to the empty travel position during the process, while also reducing the requirements for the assembly and design precision of the first interlocking unit 120.

[0063] During the circuit breaker closing process, the closing bend plate 11 drives the first transition plate 123 to move downwards. The downward movement of the first transition plate 123 drives the first connecting shaft 122 to move downwards. The downward movement of the first connecting shaft 122 causes it to slide into the first mounting bracket 121 until it can no longer slide, which in turn drives the first mounting bracket 121 to move downwards. The downward movement of the first mounting bracket 121 drives the first transmission component 110 to move downwards. The downward movement of the first transmission component 110 blocks the propulsion mechanism 20, preventing the propulsion mechanism 20 from being rocked, thus achieving the interlock that prevents the chassis from being rocked when the circuit breaker is closed. Furthermore, during this process, the first elastic component 124, under the action of elastic restoring force, assists the first connecting shaft 122 in pushing the first mounting bracket 121 downwards, improving the reliability of the closing interlock.

[0064] Optionally, see [link to relevant documentation] Figure 2 and Figure 3 A connector 1221 can be provided at the other end of the first connecting shaft 122. The connector 1221 is connected to the first adapter plate 123 by riveting or bolting. The structure is simple and easy to assemble.

[0065] Furthermore, the first elastic element 124 can be sleeved on the first connecting shaft 122, with one end of the first elastic element 124 abutting against the first mounting bracket 121 and the other end abutting against the connector 1221. This arrangement eliminates the need for additional parts to fix the first elastic element 124, simplifies the structure of the first interlocking unit 120, and facilitates the assembly of the first interlocking unit 120.

[0066] It is understandable that the first elastic element 124 can be, but is not limited to, a spring.

[0067] Optionally, see [link to relevant documentation] Figure 2 , Figure 3 and Figure 5 In one possible embodiment, the first adapter plate 123 can be connected to the closing bend plate 11 via a pin 125, which is simple in structure and easy to assemble. Of course, in other embodiments, the connection method between the first adapter plate 123 and the closing bend plate 11 can also be other, such as the cooperation of a slot and a protrusion, etc., which can be set according to actual needs, and this application does not make specific limitations.

[0068] Optionally, see [link to relevant documentation] Figure 2 and Figure 3 In this embodiment, the first mounting bracket 121 has a U-shaped structure. The top wall of the U-shaped structure has a through hole, through which one end of the first connecting shaft 122 slidably passes and abuts against the bottom wall. This arrangement allows for a slidable connection between the top wall and the first connecting shaft 122, while the bottom wall restricts the sliding stroke of the first connecting shaft 122. The structure is simple and facilitates the assembly of the first mounting bracket 121 and the first connecting shaft 122.

[0069] Further, see also Figures 2-5 The second interlocking unit 130 includes a connecting part 131 and a limiting part 132. The connecting part 131 is mounted on the first transmission member 110, and the limiting part 132 is connected to the connecting part 131. The limiting part 132 is provided with a limiting groove 1321, which is used to engage with the closing crank arm 12 to limit the rotation of the closing crank arm 12. The limiting of the closing crank arm 12 is achieved by engaging with the closing crank arm 12 through the limiting groove 1321. The structure is simple and easy to operate.

[0070] Optionally, in one possible embodiment, the limiting groove 1321 is arc-shaped, and the end of the closing crank arm 12 is an arc surface. The limiting groove 1321 can fit against the end of the closing crank arm 12, and when the closing crank arm 12 rotates in the closing direction, it will abut against the groove wall of the limiting groove 1321. This configuration improves the reliability of the engagement between the limiting groove 1321 and the closing crank arm 12.

[0071] Optionally, see [link to relevant documentation] Figure 2 and Figure 3 One side of the connecting part 131 is bent to form a limiting part 132, and a bending rib 1322 is provided on the side of the limiting part 132 away from the limiting groove 1321. This arrangement allows the second interlocking unit 130 to be manufactured by bending, resulting in a simple structure. Furthermore, by providing the bending rib 1322, the strength of the limiting part 132 can be improved, thereby reducing the risk of deformation when the limiting part 132 cooperates with the closing crank arm 12, which is beneficial to extending the service life of the second interlocking unit 130.

[0072] In this embodiment, the limiting part 132 is perpendicular to the connecting part 131, and the bending rib 1322 is perpendicular to the limiting part 132. In other embodiments, the included angle between the limiting part 132 and the connecting part 131, and the included angle between the bending rib 1322 and the limiting part 132, can also be set to other values, depending on the space inside the circuit breaker and the strength requirements of the second interlocking unit 130.

[0073] Further, see also Figure 2 and Figure 3 The first interlocking unit 120 includes a first mounting bracket 121, and the second interlocking unit 130 includes a connecting portion 131. Fasteners 140 pass through the first transmission member 110, the connecting portion 131, and the first mounting bracket 121 to connect the first transmission member 110, the connecting portion 131, and the first mounting bracket 121 together. With this configuration, the first interlocking unit 120 and the second interlocking unit 130 can be installed on the first transmission member 110 using only the fasteners 140, resulting in a simple structure and easy assembly.

[0074] Optionally, in one possible embodiment, the fastener 140 can be a bolt and nut assembly. In other possible embodiments, the fastener 140 can also be a rivet. The choice can be made according to actual needs, and this application does not impose specific limitations.

[0075] Optionally, multiple fasteners 140 can be provided to improve the connection strength between the first transmission member 110, the first interlocking unit 120, and the second interlocking unit 130. In this embodiment, three fasteners 140 are provided. In other embodiments, the number of fasteners 140 can also be set to other values, such as one or two, depending on actual needs, and this application does not impose specific limitations.

[0076] Further, see also Figure 2 and Figure 3 The first transmission component 110 includes a first vertical section 111, a bent section 112, and a second vertical section 113 connected in sequence. The end of the first vertical section 111 is provided with a mounting plate 150, which is movably connected to the interlocking bent plate of the propulsion mechanism 20. The end of the second vertical section 113 is equipped with a first interlocking unit 120 and a second interlocking unit 130. By setting the bent section 112, the axes of the first vertical section 111 and the second vertical section 113 can be made non-coincident, thus adapting to the internal structure of the circuit breaker. The movable connection between the mounting plate 150 and the interlocking bent plate of the propulsion mechanism 20 results in a simple structure that is easy to assemble.

[0077] Optionally, an elongated hole 151 can be provided on the mounting plate 150, and a pin can be provided on the interlocking bend plate, so that the pin is slidably connected to the elongated hole 151, thereby realizing the movable connection between the interlocking bend plate and the mounting plate 150. The structure is simple and easy to assemble.

[0078] Alternatively, in one possible embodiment, the first transmission member 110 is a bent shaft.

[0079] Further, see also Figure 2 , Figure 3 and Figure 5 The closing interlocking mechanism 100 also includes a second mounting bracket 160. The second mounting bracket 160 is mounted on the propulsion mechanism 20, and the first transmission member 110 is slidably connected to the second mounting bracket 160. By setting the second mounting bracket 160, the movement of the first transmission member 110 can be guided, which improves both the installation reliability of the first transmission member 110 and the reliability of its movement.

[0080] Optionally, see [link to relevant documentation] Figure 3 In one possible embodiment, the first mounting bracket 121 includes two connecting ears, each of which has a through hole, and the first transmission member 110 slides through the two through holes.

[0081] Example 2

[0082] This embodiment provides an interlocking device for a circuit breaker, which is largely the same in structure as Embodiment 1, with improvements only. Therefore, only the differences between the two are described here; structures identical to those in Embodiment 1 will not be repeated. In this embodiment, technical features identical or corresponding to those in Embodiment 1 are referred to by the same reference numerals.

[0083] like Figures 6-8 As shown, the interlocking device of the circuit breaker also includes an emergency tripping interlocking mechanism 200, which is used to press the circuit breaker's tripping plate 13 when the emergency tripping button is turned, so that the circuit breaker switches to the tripping state.

[0084] Specifically, see [link to relevant documentation] Figures 6-8 The emergency tripping interlocking mechanism 200 includes a third mounting bracket 210, a second transmission component 220, a second adapter plate 240, a second connecting shaft 230, a pressure plate 250, and a second elastic component 260.

[0085] The third mounting bracket 210 is mounted on the circuit breaker housing. The second transmission member 220 is slidably connected to the third mounting bracket 210, with one end connected to the propulsion mechanism 20 and the other end connected to the second adapter plate 240. The second connecting shaft 230 is rotatably connected to the third mounting bracket 210, with one end connected to the second adapter plate 240 and the other end connected to the pressure plate 250. The pressure plate 250 is correspondingly arranged with respect to the circuit breaker's tripping plate 13. The second elastic member 260 is configured to have a tendency to drive the second connecting shaft 230 to move the pressure plate 250 away from the tripping plate 13.

[0086] The working principle of the emergency tripping interlocking mechanism 200 is as follows:

[0087] When the emergency trip button of the circuit breaker is turned, the propulsion mechanism 20 drives the second transmission component 220 to move downward. The downward movement of the second transmission component 220 will pull the second adapter plate 240, causing the second adapter plate 240 to drive the second connecting shaft 230 to rotate. The rotation of the second connecting shaft 230 will drive the pressure plate 250 to press the circuit breaker trip plate 13, thereby tripping the circuit breaker. During this process, the second elastic component 260 is compressed and accumulates elastic potential energy.

[0088] When the emergency trip button is released, under the elastic restoring force of the second elastic element 260, the second adapter plate 240 drives the second connecting shaft 230 to rotate, causing the pressure plate 250 to separate from the trip plate 13, thereby resetting the emergency trip interlocking mechanism 200.

[0089] The emergency tripping interlocking mechanism 200 has a simple structure and can automatically reset when the emergency tripping is released, making it easy to operate. Furthermore, it can be pre-assembled before being installed in the circuit breaker, reducing the assembly difficulty of the circuit breaker.

[0090] Optionally, see [link to relevant documentation] Figure 6 and Figure 8The third mounting bracket 210 includes a detachably connected first bracket 211 and a second bracket 212. The second transmission component 220 includes a transmission shaft that slides through the first bracket 211. One end of the transmission shaft passes through a second adapter plate 240 and is connected to a limiting pin 270. A second elastic element 260 is sleeved on the transmission shaft, with one end abutting against the first bracket 211 and the other end abutting against the second adapter plate 240. A second connecting shaft 230 is rotatably connected to the second bracket 212. By detachably connecting the first bracket 211 and the second bracket 212, the emergency tripping interlocking mechanism 200 can be divided into two independent components. One component includes the first bracket 211, the second transmission component 220, the second adapter plate 240, and the second elastic element 260; the other component includes the second bracket 212, the second connecting shaft 230, and a pressure plate 250. When pre-assembling the emergency tripping interlocking mechanism 200, two components can be assembled simultaneously, and then the two components can be assembled together. This setting improves the pre-assembly efficiency of the emergency tripping interlocking mechanism 200.

[0091] In addition, by assembling the second elastic element 260 through the drive shaft, the structure for fixing the second elastic element 260 is eliminated, and the connection between the drive shaft and the second adapter plate 240 is achieved through the cooperation of the second elastic element 260 and the limiting pin 270, which greatly reduces the assembly difficulty.

[0092] Example 3

[0093] This embodiment provides a circuit breaker, including a circuit breaker body 10, a propulsion mechanism 20, and an interlocking device for the circuit breaker provided in Embodiment 1 or Embodiment 2. The circuit breaker body 10 includes a closing bend 11 and a closing crank arm 12, and the interlocking device of the circuit breaker cooperates with the closing bend 11 and the closing crank arm 12 via the propulsion mechanism 20.

[0094] Because this circuit breaker uses the aforementioned interlocking device, its closing interlocking reliability is better, and its production efficiency is higher.

[0095] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. Interlocking device for circuit breakers, characterized in that, Includes a closing interlocking mechanism (100); The closing interlocking mechanism (100) includes a first transmission component (110), a first interlocking unit (120), and a second interlocking unit (130). The first transmission component (110) is connected to the push mechanism (20) of the circuit breaker. The first interlocking unit (120) is mounted on the first transmission component (110) and connected to the closing bend (11) of the circuit breaker. The second interlocking unit (130) is mounted on the first transmission component (110) and is used to cooperate with the closing crank arm (12) of the circuit breaker. If the circuit breaker is in the open state, the propulsion mechanism (20) can drive the first transmission member (110) to move the first interlocking unit (120) and the second interlocking unit (130), so that the first interlocking unit (120) pushes the closing bend plate (11) to the empty stroke position, and locks the second interlocking unit (130) with the closing crank arm (12); if the circuit breaker is in the closed state, the closing bend plate (11) drives the first interlocking unit (120) to drive the first transmission member (110) to lock the propulsion mechanism (20).

2. The interlocking device for a circuit breaker according to claim 1, characterized in that, The first interlocking unit (120) includes: The first mounting bracket (121) is mounted on the first transmission component (110); The first connecting shaft (122) is slidably connected at one end to the first mounting bracket (121); The first adapter plate (123) connects the other end of the first connecting shaft (122) and the closing bend plate (11); The first elastic element (124) is configured to have a tendency to drive the first connecting shaft (122) away from the first mounting bracket (121).

3. The interlocking device for a circuit breaker according to claim 1, characterized in that, The second interlocking unit (130) includes a connecting part (131) and a limiting part (132) connected to the connecting part (131). The connecting part (131) is mounted on the first transmission member (110). The limiting part (132) is provided with a limiting groove (1321). The limiting groove (1321) is used to engage with the closing crank arm (12) to limit the rotation of the closing crank arm (12).

4. The interlocking device for a circuit breaker according to claim 3, characterized in that, One side of the connecting part (131) is bent to form the limiting part (132), and the limiting part (132) is provided with a bending rib (1322) on the side opposite to the limiting groove (1321).

5. The interlocking device for a circuit breaker according to claim 1, characterized in that, The first interlocking unit (120) includes a first mounting bracket (121), and the second interlocking unit (130) includes a connecting portion (131). Fasteners (140) pass through the first transmission member (110), the connecting portion (131), and the first mounting bracket (121) to connect the first transmission member (110), the connecting portion (131), and the first mounting bracket (121) together.

6. The interlocking device for a circuit breaker according to claim 1, characterized in that, The first transmission component (110) includes a first vertical section (111), a bent section (112), and a second vertical section (113) connected in sequence. The end of the first vertical section (111) is provided with a mounting plate (150), which is movably connected to the interlocking bent plate of the propulsion mechanism (20). The end of the second vertical section (113) is equipped with the first interlocking unit (120) and the second interlocking unit (130).

7. The interlocking device for a circuit breaker according to claim 1, characterized in that, The closing interlocking mechanism (100) further includes a second mounting bracket (160), which is mounted on the propulsion mechanism (20), and the first transmission member (110) is slidably connected to the second mounting bracket (160).

8. The interlocking device for the circuit breaker according to any one of claims 1-7, characterized in that, The interlocking device of the circuit breaker further includes an emergency tripping interlocking mechanism (200), which includes: The third mounting bracket (210) is mounted on the housing of the circuit breaker; The second transmission component (220) is slidably connected to the third mounting bracket (210) and one end is connected to the propulsion mechanism (20) in a transmission manner; The second adapter plate (240) is connected at one end to the second transmission component (220); The second connecting shaft (230) is rotatably connected to the third mounting bracket (210), and one end of the second connecting shaft (230) is connected to the second adapter plate (240); A pressure plate (250) is installed at the end of the second connecting shaft (230) away from the second adapter plate (240). When the circuit breaker is in an emergency tripping state, the push mechanism (20) drives the second transmission component (220) to rotate the second connecting shaft (230) through the second adapter plate (240) so that the pressure plate (250) presses the tripping plate (13) of the circuit breaker. The second elastic element (260) is configured to have a tendency to drive the second connecting shaft (230) to move the pressure plate (250) away from the gate plate (13).

9. The interlocking device for a circuit breaker according to claim 8, characterized in that, The third mounting bracket (210) includes a first frame (211) and a second frame (212) that are detachably connected. The second transmission component (220) includes a transmission shaft that slides through the first frame (211). The end of the transmission shaft passes through the second adapter plate (240) and is connected to the limiting pin (270). The second elastic component (260) is sleeved on the transmission shaft. One end of the second elastic component (260) abuts against the first frame (211) and the other end abuts against the second adapter plate (240). The second connecting shaft (230) is rotatably connected to the second frame (212).

10. A circuit breaker, characterized in that, The circuit breaker includes a circuit breaker body (10), a propulsion mechanism (20), and an interlocking device for the circuit breaker according to any one of claims 1-9. The circuit breaker body (10) includes a closing bend (11) and a closing crank arm (12). The interlocking device of the circuit breaker cooperates with the closing bend (11) and the closing crank arm (12) through the propulsion mechanism (20).

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