Circuit breaker interlock device

Abstract

This application discloses a circuit breaker interlocking device, relating to the field of circuit breaker technology. The circuit breaker interlocking device includes a housing and a first linkage handle, a second linkage handle, a first interlocking plate, and a second interlocking plate rotatably disposed within the housing. The first linkage handle includes a first extension rod and a first drive rod, the first extension rod being connected to a first handle. The second linkage handle includes a second extension rod and a second drive rod, the second extension rod being connected to a second handle. The first interlocking plate includes a first receiving portion and a first unlocking portion, the first receiving portion abutting against the first drive rod, and the first unlocking portion being connected to a second tripping mechanism. The second interlocking plate includes a second receiving portion and a second unlocking portion, the second receiving portion abutting against the second drive rod, and the second unlocking portion being connected to the first tripping mechanism. The circuit breaker interlocking device provided by this application can enhance the interlocking capability of the interlocking device and further improve the safety of the main and backup power supply.

Description

Technical Field

[0001] This application relates to the field of circuit breaker technology, specifically to a circuit breaker interlocking device. Background Technology

[0002] To ensure power supply safety and improve continuous power supply capability, dual circuit breakers are often used to control the two power sources separately in scenarios with two main and backup power supplies. It is required that when one power source is supplying power, the other power source must be disconnected, and it is strictly forbidden to close both circuit breakers at the same time, otherwise it will directly cause a short circuit accident, which poses a great safety hazard.

[0003] The existing Chinese invention patent, "Interlocking Device" (CN117832025A), can achieve unidirectional interlocking and linked tripping, meaning that when the first circuit breaker closes and the second circuit breaker closes, it will cause the first circuit breaker to trip. However, this solution still has technical shortcomings. It cannot achieve complete bidirectional interlocking of the two circuit breakers, and it lacks a locking mechanism for simultaneous closing operations. In practice, it is cumbersome to operate and still has the potential for short circuits.

[0004] Therefore, there is an urgent need to propose a circuit breaker interlocking device to solve the problems existing in the current technology. Summary of the Invention

[0005] The purpose of this application is to provide a circuit breaker interlocking device that can enhance the interlocking capability of the interlocking device and further improve the safety of the main and backup power supply.

[0006] This application provides a circuit breaker interlocking device disposed between adjacent first and second circuit breakers. The first circuit breaker includes a first handle and a first tripping mechanism, and the second circuit breaker includes a second handle and a second tripping mechanism. The circuit breaker interlocking device includes a housing and a first linkage handle, a second linkage handle, a first interlocking plate, and a second interlocking plate rotatably disposed within the housing.

[0007] The first linkage handle includes a first extension rod and a first drive rod, the first extension rod being connected to the first handle. The second linkage handle includes a second extension rod and a second drive rod, the second extension rod being connected to the second handle.

[0008] The first interlock plate includes a first receiving part and a first unlocking part. The first receiving part abuts against the first driving rod, and the first unlocking part is connected to the second release mechanism. The second interlock plate includes a second receiving part and a second unlocking part. The second receiving part abuts against the second driving rod, and the second unlocking part is connected to the first release mechanism.

[0009] When the first linkage handle rotates with the first handle to close the circuit, it applies force to the first receiving part via the first drive rod, thereby driving the first interlock plate to rotate and driving the second tripping mechanism to disengage via the first unlocking part. When the second linkage handle rotates with the second handle to close the circuit, it applies force to the second receiving part via the second drive rod, thereby driving the second interlock plate to rotate and driving the first tripping mechanism to disengage via the second unlocking part.

[0010] The above scheme enables the second tripping mechanism to be unlocked by the first linkage handle and the first interlock plate when the first circuit breaker is closed, and the first tripping mechanism to be unlocked by the second linkage handle and the second interlock plate when the second circuit breaker is closed. This effectively avoids the possibility of two circuit breakers being in the closed state at the same time, and prevents two circuit breakers from performing closing operations at the same time, which is conducive to ensuring power supply safety and improving continuous power supply capability.

[0011] In some examples, the first handle, the first linkage handle, the second linkage handle, and the second handle are rotatably arranged on the same axis. The first handle is provided with a first insertion hole, and the first extension rod is inserted into the first insertion hole. The second handle is provided with a second insertion hole, and the second extension rod is inserted into the second insertion hole.

[0012] By using a coaxial arrangement, the overall structure of the interlocking device can be simplified, the space occupied can be reduced, and the rotation of the first and second linkage handles can be made smoother and the action response can be more timely. The plug-in connection method can not only ensure reliable transmission between the first handle and the first linkage handle, and between the second handle and the second linkage handle, but also facilitate assembly and disassembly, improving the convenience of installation and maintenance.

[0013] In some examples, the first drive rod has a first boss on the side near the first receiving part, and the top of the first boss and the end of the first drive rod are both provided with arc-shaped contact surfaces. During the rotation of the first linkage handle, the first boss and the end of the first drive rod abut against the first receiving part in sequence.

[0014] By adding a first boss and configuring an arc-shaped contact surface to the first drive rod, the transmission connection between the first linkage handle and the first interlock plate can be optimized, effectively reducing transmission friction and jamming risks, achieving smooth transmission and stable force transmission throughout the opening and closing process, and significantly improving the smoothness of operation and reliability of the interlock device.

[0015] In some examples, a second boss is provided on the side of the second drive rod near the second receiving part. The top of the second boss and the end of the second drive rod are both provided with arc-shaped contact surfaces. During the rotation of the second linkage handle, the second boss and the end of the second drive rod abut against the second receiving part in sequence.

[0016] Similarly, by adding a second boss and configuring an arc-shaped contact surface to the second drive rod, the transmission connection between the second linkage handle and the second interlock plate can be optimized, effectively reducing transmission friction and jamming risks, achieving smooth transmission and stable force transmission throughout the opening and closing process, and significantly improving the smoothness of operation and reliability of the interlock device.

[0017] In some examples, the circuit breaker interlocking device also includes an elastic element, which includes a fixed end, an energy storage part, a first lever arm, and a second lever arm. The fixed end and the energy storage part are fixed inside the housing. The first lever arm abuts against the side of the first interlocking plate opposite to the side where the first receiving part is located, and the second lever arm abuts against the side of the second interlocking plate opposite to the side where the second receiving part is located.

[0018] The elastic element provides elastic preload to the first and second interlock plates, ensuring that the two interlock plates can automatically and quickly return to their original positions when not driven by external forces. It also helps the two interlock plates maintain their initial engagement state when not subjected to the force of the corresponding linkage handle, thereby improving the reliability and consistency of the interlock device.

[0019] In some examples, the first interlocking plate is provided with a first abutting boss, and the second interlocking plate is provided with a second abutting boss. The top surfaces of the first abutting boss and the second abutting boss are both arc surfaces. The first lever arm abuts against the arc surface of the first abutting boss, and the second lever arm abuts against the arc surface of the second abutting boss.

[0020] By setting arc-shaped abutment bosses on the first and second interlocking plates, the abutment fit between the elastic element lever arm and the interlocking plates can be optimized, greatly reducing sliding friction and local stress, avoiding jamming and wear at the abutment parts, ensuring that each interlocking plate moves smoothly and is subjected to uniform force during elastic reset, and improving reset stability and service life.

[0021] In some examples, the first interlock plate and the second interlock plate are coaxial and side by side, the first unlocking part extends to the side of the second interlock plate near the second circuit breaker, and the second unlocking part extends to the side of the first interlock plate near the first circuit breaker.

[0022] The first interlock plate and the second interlock plate are arranged coaxially and side by side, and the first unlocking part and the second unlocking part adopt a cross-extending layout. This allows the unlocking part to act on the corresponding release mechanism across the side within a compact assembly space, which not only avoids interference of the interlock plate movement, but also optimizes the spatial arrangement and greatly improves the structural compactness of the interlocking device and the accuracy of the interlocking action.

[0023] In some examples, the housing is provided with a first clearance hole, and the first release mechanism includes a first linkage post, the portion of which extends into the first clearance hole is located on the rotation path of the second unlocking part.

[0024] The arrangement of the first clearance hole and the first linkage column, combined with the transmission cooperation between the second unlocking part and the first linkage column, enables the second interlock plate to trigger the first tripping mechanism without interference within a limited assembly space. This optimizes the utilization of structural space, ensures accurate and smooth unlocking action, and effectively improves the reliability of the first circuit breaker's tripping action when the second circuit breaker is closed.

[0025] In some examples, the housing is provided with a second clearance hole, and the first unlocking part is provided with a second linkage post, which extends out of the second clearance hole and is connected to the second release mechanism.

[0026] The arrangement of the second clearance hole and the second linkage column facilitates the direct action of the first unlocking part on the second release mechanism through the second linkage column. This allows the first interlock plate to trigger and unlock the second release mechanism without interference within a limited assembly space, which not only saves assembly space but also features efficient and stable transmission.

[0027] In some examples, when the first linkage handle rotates to the closed position with the first handle, the reaction force of the first interlock plate on the first drive rod is directed in the direction of maintaining the first linkage handle in the closed position. When the second linkage handle rotates to the closed position with the second handle, the reaction force of the second interlock plate on the second drive rod is directed in the direction of maintaining the second linkage handle in the closed position.

[0028] The above scheme can maintain the stability of the closed position by utilizing the structural dead point when the first or second linkage handle is rotated to the closed position, reducing the risk that the first or second linkage handle will easily spring back to the open position. This is beneficial to improving the reliability of the interlocking device and the two circuit breakers, and ensuring stable power supply. Attached Figure Description

[0029] 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.

[0030] Figure 1 A schematic diagram of the overall structure of the first circuit breaker, the circuit breaker interlocking device, and the second circuit breaker provided in the embodiments of this application.

[0031] Figure 2 This is a schematic diagram of the internal structure of the first circuit breaker provided in an embodiment of this application.

[0032] Figure 3 This is a schematic diagram of the internal structure of the second circuit breaker provided in an embodiment of this application.

[0033] Figure 4This is a schematic diagram of the internal structure of the interlocking device housing provided in an embodiment of this application.

[0034] Figure 5 This is a schematic diagram of the internal components of the interlocking device provided in the embodiments of this application.

[0035] Figure 6 This is a schematic diagram of the structure of the first circuit breaker after it is closed, as provided in an embodiment of this application.

[0036] Figure 7 Provided for the embodiments of this application Figure 6 Another perspective.

[0037] Figure 8 This is a schematic diagram of the cooperation structure between the first linkage handle and the first interlock plate during the closing process provided in the embodiments of this application.

[0038] Figure 9 This is a schematic diagram of the structure of the first linkage handle and the first interlock plate after the closing is completed, as provided in the embodiment of this application.

[0039] Figure 10 This is a schematic diagram of the structure of the second circuit breaker after it is closed, as provided in an embodiment of this application.

[0040] Figure 11 One of the force analysis diagrams of the first linkage handle and the first interlocking plate provided in the embodiments of this application.

[0041] Figure 12 The second force analysis diagram of the first linkage handle and the first interlocking plate provided in the embodiments of this application.

[0042] Explanation of reference numerals in the attached drawings: 1. First circuit breaker; 11. First handle; 111. First insertion hole; 12. First tripping mechanism; 121. First linkage post; 2. Second circuit breaker; 21. Second handle; 211. Second insertion hole; 22. Second tripping mechanism; 221. Reset component; 3. Housing; 31. Fixed boss; 32. Positioning post; 33. First clearance hole; 34. Second clearance hole; 4. First linkage handle; 41. First extension rod; 42. First drive rod; 421. First boss; 5. Second linkage handle; 51. Second extension rod; 52. Second drive rod; 521. Second boss; 6. First interlock plate; 61. First receiving part; 62. First unlocking part; 621. Second linkage column; 63. First abutting boss; 7. Second interlock plate; 71. Second receiving part; 72. Second unlocking part; 73. Second abutting boss; 8. Elastic element; 81. Fixed end; 82. Energy storage part; 83. First lever arm; 84. Second lever arm. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0045] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0046] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for 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. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0047] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0048] To ensure power supply safety or improve continuous power supply capability, dual power supply is often used in many situations. When one power supply is on, the other power supply is not allowed to supply power, or when one power supply is on, the other power supply must be disconnected at the same time. If both power supplies are on at the same time, a short circuit accident will occur, which poses a great safety hazard.

[0049] Existing technology can achieve unidirectional interlocking and coordinated tripping by setting an interlocking device between two circuit breakers that control two power supplies. That is, when the first circuit breaker closes and the second circuit breaker closes, it will cause the first circuit breaker to trip. However, it cannot achieve coordinated tripping of the two circuit breakers in the reverse direction, and there is no locking mechanism for the simultaneous closing operation of the two circuit breakers. This results in cumbersome operation and the risk of short circuits.

[0050] Based on this, this application provides a circuit breaker interlocking device that can enhance the interlocking capability of the interlocking device and further improve the safety of main and backup power supply.

[0051] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0052] Reference Figures 1 to 5 This embodiment provides a circuit breaker interlocking device, which is disposed between adjacent first circuit breakers 1 and second circuit breakers 2. The first circuit breaker 1 includes a first handle 11 and a first tripping mechanism 12, and the second circuit breaker 2 includes a second handle 21 and a second tripping mechanism 22. The circuit breaker interlocking device includes a housing 3 and a first linkage handle 4, a second linkage handle 5, a first interlocking plate 6 and a second interlocking plate 7 rotatably disposed in the housing 3.

[0053] The first linkage handle 4 includes a first extension rod 41 and a first drive rod 42, with the first extension rod 41 connected to the first handle 11. The second linkage handle 5 includes a second extension rod 51 and a second drive rod 52, with the second extension rod 51 connected to the second handle 21.

[0054] The first interlock plate 6 includes a first receiving part 61 and a first unlocking part 62. The first receiving part 61 abuts against the first drive rod 42, and the first unlocking part 62 is connected to the second release mechanism 22. The second interlock plate 7 includes a second receiving part 71 and a second unlocking part 72. The second receiving part 71 abuts against the second drive rod 52, and the second unlocking part 72 is connected to the first release mechanism 12.

[0055] Reference Figures 5 to 10 When the first linkage handle 4 rotates with the first handle 11 to close the circuit, it applies force to the first receiving part 61 through the first drive rod 42, thereby driving the first interlock plate 6 to rotate, and driving the second tripping mechanism 22 to trip through the first unlocking part 62. When the second linkage handle 5 rotates with the second handle 21 to close the circuit, it applies force to the second receiving part 71 through the second drive rod 52, thereby driving the second interlock plate 7 to rotate, and driving the first tripping mechanism 12 to trip through the second unlocking part 72.

[0056] The above scheme enables the second tripping mechanism 22 to be unlocked by the first linkage handle 4 and the first interlock plate 6 when the first circuit breaker 1 is closed, and enables the first tripping mechanism 12 to be unlocked by the second linkage handle 5 and the second interlock plate 7 when the second circuit breaker 2 is closed. This effectively avoids the possibility of the two circuit breakers being in the closed state at the same time, and prevents the two circuit breakers from performing closing operations at the same time, which is conducive to ensuring power supply safety and improving continuous power supply capability.

[0057] Reference Figures 1 to 3 In this circuit breaker, the first circuit breaker 1 and the second circuit breaker 2, which are adjacent to each other, control one power supply. The two circuit breakers are arranged side by side. The first handle 11 of the first circuit breaker 1 is for manual operation. The first handle 11 is connected to the first tripping mechanism 12. Rotating the first handle 11 to the closed position keeps the first tripping mechanism 12 locked. To open the circuit, the first tripping mechanism 12 unlocks the first handle 11 and moves it to the open position. The second circuit breaker 2 is the same as the first circuit breaker 1 and has the same control process, which will not be described in detail here.

[0058] Reference Figures 2 to 5 The interlocking device also includes a housing 3, which is located between the first circuit breaker 1 and the second circuit breaker 2. The housing 3 of the interlocking device can provide an installation foundation and protection for the first linkage handle 4, the second linkage handle 5, the first interlocking plate 6 and the second interlocking plate 7.

[0059] Specifically, the first linkage handle 4 and the second linkage handle 5 are rotatably disposed on the same side of the housing 3, and are on the same side as the first handle 11 on the first circuit breaker 1 and the second handle 21 on the second circuit breaker 2. The first extension rod 41 and the second extension rod 51 are located on the outside of the housing 3, while the first drive rod 42 and the second drive rod 52 are located opposite each other on the side of the first linkage handle 4 and the second linkage handle 5 closer to the inside of the housing 3.

[0060] Reference Figures 2 to 7 Taking the first linkage handle 4 as an example, the first linkage handle 4 is connected to the first handle 11 via the first extension rod 41, so that when the first handle 11 is operated to close the first circuit breaker 1, the first handle 11 can drive the first linkage handle 4 to rotate synchronously from the open position to the closed position. Furthermore, when the first circuit breaker 1 is opened, the first handle 11 can also drive the first linkage handle 4 to rotate synchronously from the closed position to the open position.

[0061] Similarly, the second linkage handle 5 is connected to the second handle 21 via the second extension rod 51, so that when the second handle 21 is operated to close the second circuit breaker 2, the second handle 21 can drive the second linkage handle 5 to rotate synchronously from the open position to the closed position. Furthermore, when the second circuit breaker 2 is opened, the second handle 21 can also drive the second linkage handle 5 to rotate synchronously from the closed position to the open position.

[0062] Reference Figures 3 to 8 The first interlocking plate 6 is rotatably disposed inside the housing 3. Specifically, the first interlocking plate 6 is a long strip-shaped plate structure. The rotation center of the first interlocking plate 6 is located in its middle region. The first receiving part 61 and the first unlocking part 62 are located near both ends of the first interlocking plate 6.

[0063] In the interlocking device, the first receiving part 61 is located on the rotation path of the first driving rod 42. During the rotation of the first driving rod 42 as a whole with the first linkage handle 4, a thrust can be applied to the first receiving part 61, causing the first interlock plate 6 to rotate. During the rotation of the first interlock plate 6, the first unlocking part 62 can apply force to the second tripping mechanism 22, so that the second tripping mechanism 22 can be released and unlocked, thereby preventing the second circuit breaker 2 from closing or directly opening.

[0064] The second interlock plate 7 is also rotatably disposed inside the housing 3. The second interlock plate 7 is also a long strip plate structure. The rotation center of the second interlock plate 7 is located in its middle region. The second receiving part 71 and the second unlocking part 72 are located near both ends of the second interlock plate 7.

[0065] In the interlocking device, the second receiving part 71 is located on the rotation path of the second drive rod 52. During the rotation of the second drive rod 52 as a whole with the second linkage handle 5, a thrust can be applied to the second receiving part 71 to cause the second interlock plate 7 to rotate. During the rotation of the second interlock plate 7, the second unlocking part 72 can apply force to the first tripping mechanism 12 to make the first tripping mechanism 12 trip and unlock, thereby preventing the first circuit breaker 1 from closing or directly opening.

[0066] The specific process of the first unlocking unit 62 driving the second release mechanism 22 to release and unlock, and the second unlocking unit 72 driving the first release mechanism 12 to release and unlock will be described in detail below, and will not be elaborated here.

[0067] Through the above-mentioned structural coordination, this interlocking device achieves bidirectional interlocking between the two circuit breakers, ensuring that only one circuit breaker can remain closed at any given time. From a mechanical structure perspective, it avoids the short-circuit risk caused by two power sources supplying power simultaneously, thereby improving the safety and reliability of the power supply system.

[0068] Reference Figures 1 to 3 In some examples, the first handle 11, the first linkage handle 4, the second linkage handle 5, and the second handle 21 are rotatably arranged on the same axis. The first handle 11 is provided with a first insertion hole 111, and the first extension rod 41 is inserted into the first insertion hole 111. The second handle 21 is provided with a second insertion hole 211, and the second extension rod 51 is inserted into the second insertion hole 211.

[0069] By using a coaxial arrangement, the overall structure of the interlocking device can be simplified, the space occupied can be reduced, and the rotation of the first linkage handle 4 and the second linkage handle 5 can be made smoother and the action response can be more timely. The plug-in connection method can not only ensure reliable transmission between the first handle 11 and the first linkage handle 4, and the second handle 21 and the second linkage handle 5, but also facilitate assembly and disassembly, improving the convenience of installation and maintenance.

[0070] Specifically, the first handle 11 and the first linkage handle 4 are rotatably arranged on the same axis. The first insertion hole 111 is opened on the side of the first handle 11 near the first linkage handle 4, and the first extension rod 41 is arranged on the side of the first linkage handle 4 near the first handle 11. The shape and size of the first insertion hole 111 can be the same as the shape and size of the first extension rod 41 to facilitate insertion and maintain a stable connection by means of interference fit.

[0071] The second handle 21 and the second linkage handle 5 are rotatably mounted on the same axis, and are also on the same axis as the first handle 11 and the first linkage handle 4, which allows the two circuit breakers and the interlocking device to have a more compact structure. Accordingly, the second insertion hole 211 is opened on the side of the second handle 21 near the second linkage handle 5, and the second extension rod 51 is located on the side of the second linkage handle 5 near the second handle 21.

[0072] The shape and size of the second insertion hole 211 can be the same as the shape and size of the second extension rod 51, so as to facilitate the insertion of the second extension rod 51 into the second insertion hole 211. Similarly, a reliable connection can be achieved by using an interference fit. This type of fit ensures a stable connection between the first handle 11 and the first linkage handle 4, and between the second handle 21 and the second linkage handle 5, while also simplifying the assembly structure.

[0073] Reference Figures 3 to 4 In some examples, the first drive rod 42 has a first boss 421 on the side near the first receiving part 61. The top of the first boss 421 and the end of the first drive rod 42 are both provided with arc-shaped contact surfaces. During the rotation of the first linkage handle 4, the first boss 421 and the end of the first drive rod 42 abut against the first receiving part 61 in sequence.

[0074] By adding a first boss 421 to the first drive rod 42 and configuring an arc-shaped contact surface, the transmission connection between the first linkage handle 4 and the first interlock plate 6 can be optimized, effectively reducing transmission friction and jamming risks, achieving smooth transmission and stable force transmission throughout the opening and closing process, and greatly improving the smoothness of the interlock device's operation and reliability.

[0075] Specifically, refer to Figure 3The first protrusion 421 is located on the side of the first drive rod 42 near the first receiving part 61, and the top of the first protrusion 421 abuts against the first receiving part 61. At this time, the first linkage handle 4 and the first handle 11 are in the open position. When performing the closing operation, the first linkage handle 4 rotates counterclockwise, and the first protrusion 421 pushes the first interlock plate 6 to rotate.

[0076] When the first linkage handle 4 rotates to the position shown... Figure 8 When the first protrusion 421 and the end of the first drive rod 42 are in position, the top of the first protrusion 421 and the end of the first drive rod 42 simultaneously abut against the first receiving part 61. As the first linkage handle 4 continues to rotate, the end of the first drive rod 42 pushes the first interlocking plate 6 to rotate. For example... Figure 9 Finally, the first linkage handle 4 rotates to the closed position, and the first interlock plate 6 rotates to the position where the first unlocking part 62 can accurately unlock the second tripping mechanism 22.

[0077] Furthermore, the first receiving part 61 is a plane, and the top of the first boss 421 and the end of the first drive rod 42 are both arc-shaped contact surfaces. During the rotation of the first linkage handle 4, the arc-shaped contact surface at the top of the first boss 421 always maintains line contact or point contact with the first receiving part 61, and the arc-shaped contact surface at the end of the first drive rod 42 always maintains line contact or point contact with the first receiving part 61, so as to minimize the contact area, reduce frictional resistance, and structurally avoid the rotating pair from jamming or getting stuck, ensuring smooth and unobstructed transmission.

[0078] The first protrusion 421 is positioned near the rotation center of the first linkage handle 4 on the first drive rod 42. The first protrusion 421 can push against the first interlock plate 6 at this position until it smoothly transitions to contact the end of the first drive rod 42. This structural design extends the first drive rod 42, ensuring that it can push the first interlock plate 6 to rotate to a position where the first unlocking part 62 can accurately unlock the second release mechanism 22. Simultaneously, it ensures that the first drive rod 42 can smoothly push against the first interlock plate 6, avoiding jamming due to excessive length.

[0079] Conversely, when the first circuit breaker 1 is tripped and reset, the first handle 11 drives the first linkage handle 4 to rotate in the opposite direction. The first drive rod 42 and the first interlock plate 6 smoothly switch from the end of the first drive rod 42 contacting the first receiving part 61 to the top of the first boss 421 contacting the first receiving part 61. There is no rigid impact or mechanical jamming throughout the process, which further improves the stability of the mechanism and its service life.

[0080] Reference Figures 3 to 4In some examples, the second drive rod 52 is provided with a second boss 521 on the side near the second receiving part 71. The top of the second boss 521 and the end of the second drive rod 52 are both provided with arc-shaped contact surfaces. During the rotation of the second linkage handle 5, the ends of the second boss 521 and the second drive rod 52 abut against the second receiving part 71 in sequence.

[0081] Similarly, by adding a second boss 521 to the second drive rod 52 and configuring an arc-shaped contact surface, the transmission connection between the second linkage handle 5 and the second interlock plate 7 can be optimized, effectively reducing transmission friction and jamming risks, achieving smooth transmission and stable force transmission throughout the opening and closing process, and greatly improving the smoothness of the interlock device's operation and reliability.

[0082] Specifically, refer to Figure 10 The second protrusion 521 is located on the side of the second drive rod 52 near the second receiving part 71, and the top of the second protrusion 521 abuts against the second receiving part 71. At this time, the second linkage handle 5 and the second handle 21 are in the open position. When performing the closing operation, the second linkage handle 5 rotates counterclockwise, and the second protrusion 521 pushes the second interlock plate 7 to rotate.

[0083] When the second linkage handle 5 rotates to, for example Figure 8 When the first linkage handle 4 is in the middle position, the top of the second protrusion 521 and the end of the second drive rod 52 simultaneously abut against the second receiving part 71. As the second linkage handle 5 continues to rotate, the end of the second drive rod 52 pushes the second interlock plate 7 to rotate. Finally, the second linkage handle 5 rotates to the closed position, and the second interlock plate 7 rotates to the position where the second unlocking part 72 can accurately unlock the first tripping mechanism 12.

[0084] The second receiving part 71 is flat, and the top of the second boss 521 and the end of the second drive rod 52 are both arc-shaped contact surfaces. During the rotation of the second linkage handle 5, the arc-shaped contact surface at the top of the second boss 521 always maintains line contact or point contact with the second receiving part 71, and the arc-shaped contact surface at the end of the second drive rod 52 always maintains line contact or point contact with the second receiving part 71, so as to minimize the contact area, reduce frictional resistance, and structurally avoid the rotating pair from jamming or getting stuck, ensuring smooth and unobstructed transmission.

[0085] The second protrusion 521 is positioned near the rotation center of the second drive rod 52, close to the rotation center of the second linkage handle 5. The second protrusion 521 can push against the second interlock plate 7 at this position until it smoothly transitions to contact the end of the second drive rod 52. This structural design extends the second drive rod 52, ensuring that it can push the second interlock plate 7 to rotate to a position where the second unlocking part 72 can accurately unlock the first release mechanism 12. Simultaneously, it ensures that the second drive rod 52 can smoothly push against the second interlock plate 7, avoiding jamming due to excessive length.

[0086] Conversely, when the second circuit breaker 2 is tripped and reset, the second handle 21 drives the second linkage handle 5 to rotate in the opposite direction. The second drive rod 52 and the second interlock plate 7 smoothly switch from the end of the second drive rod 52 contacting the second receiving part 71 to the top of the second boss 521 contacting the second receiving part 71. There is no rigid impact or mechanical jamming throughout the process, which further improves the stability of the mechanism and its service life.

[0087] Reference Figures 4 to 5 In some examples, the circuit breaker interlocking device also includes an elastic element 8, which includes a fixed end 81, an energy storage part 82, a first lever arm 83 and a second lever arm 84. The fixed end 81 and the energy storage part 82 are fixed inside the housing 3. The first lever arm 83 abuts against the side of the first interlocking plate 6 opposite to the side where the first receiving part 61 is located, and the second lever arm 84 abuts against the side of the second interlocking plate 7 opposite to the side where the second receiving part 71 is located.

[0088] The elastic element 8 provides elastic preload to the first interlock plate 6 and the second interlock plate 7, ensuring that the two interlock plates can automatically and quickly return to their original positions when not driven by external forces. It also helps the two interlock plates maintain their initial engagement state when not subjected to the force of the corresponding linkage handle, thereby improving the reliability and consistency of the interlock device.

[0089] Reference Figures 4 to 5 In this embodiment, the elastic element 8 can be a torsion spring structure, which specifically includes a fixed end 81, an energy storage part 82, a first lever arm 83, and a second lever arm 84. The fixed end 81 and the energy storage part 82 are fixed inside the housing 3. Specifically, the inner wall of the housing 3 is provided with a fixing boss 31 and a positioning post 32. The fixed end 81 is engaged with one side of the fixing boss 31, the energy storage part 82 is sleeved on the positioning post 32, and the first lever arm 83 and the second lever arm 84 abut against corresponding interlocking plates, thus making the elastic element 8 V-shaped and installed inside the housing 3.

[0090] Furthermore, the elastic element 8 can be in a pre-tightened state, and can provide pre-tightening force to the two interlock plates through the first lever arm 83 and the second lever arm 84, so that when the whole device is in the initial state, the first interlock plate 6 is in close contact with the first linkage handle 4 and the second interlock plate 7 is in close contact with the second linkage handle 5, so that the linkage handle can accurately apply force to the corresponding interlock plate when the circuit is closed, thereby improving the accuracy of the coordination.

[0091] Furthermore, the elastic element 8 is preferably an integrated double torsion spring structure, which features a compact overall structure, uniform force distribution, and easy assembly.

[0092] When the first circuit breaker 1 is operated to perform the closing action, the first handle 11 drives the first linkage handle 4 to rotate synchronously. The first linkage handle 4 applies a driving force to the first interlock plate 6 through the first drive rod 42. This driving force is greater than the elastic force applied by the first lever arm 83 of the elastic member 8, and overcomes the elastic force to drive the first interlock plate 6 to rotate around the rotation center. The energy storage unit 82 starts to store energy.

[0093] When the thrust applied by the first linkage handle 4 to the first interlock plate 6 is removed (i.e. the first circuit breaker 1 is opened), the energy storage part 82 of the elastic element 8 releases elastic potential energy, and pushes the first interlock plate 6 to rotate in the opposite direction and reset through the first lever arm 83, so that the first interlock plate 6 returns to the initial engagement position and prepares for the next interlocking action.

[0094] Similarly, the driving and resetting process of the second interlock plate 7 is consistent with the above principle. Relying on the symmetrical elastic action of the elastic element 8, the two sets of interlock plates are automatically reset synchronously, ensuring the continuous and stable operation of the bidirectional interlock function.

[0095] Reference Figures 4 to 5 In some examples, the first interlocking plate 6 is provided with a first abutting boss 63, and the second interlocking plate 7 is provided with a second abutting boss 73. The top surfaces of the first abutting boss 63 and the second abutting boss 73 are both arc surfaces. The first lever arm 83 abuts against the arc surface of the first abutting boss 63, and the second lever arm 84 abuts against the arc surface of the second abutting boss 73.

[0096] The first interlocking plate 6 and the second interlocking plate 7 are provided with arc-shaped abutment bosses, which can optimize the abutment fit between the lever arm of the elastic element 8 and the interlocking plate, greatly reduce sliding friction and local stress, avoid jamming and wear at the abutment part, ensure that each interlocking plate moves smoothly and is subjected to uniform force during elastic reset, and improve reset stability and service life.

[0097] Specifically, the first interlocking plate 6 has a first abutting boss 63 on the side near the first lever arm 83, and the second interlocking plate 7 has a second abutting boss 73 on the side near the second lever arm 84. The top surfaces of both abutting bosses adopt an arc-shaped curved surface structure. The first lever arm 83 and the arc surface of the first abutting boss 63 form an abutting fit, and the second lever arm 84 and the arc surface of the second abutting boss 73 form an abutting fit. Both transmit elastic force through point contact or line contact.

[0098] The arc-shaped fit significantly reduces the frictional resistance between the lever arm and the abutment boss, avoiding problems such as rigid jamming and motion stagnation during the rotation and reset of the interlock plate. It also disperses the local contact stress caused by the elastic force, reducing the risk of wear and deformation at the abutment point. This structure ensures that the reset force of the elastic element 8 is smoothly transmitted to the interlock plate, enabling the interlock plate to achieve impact-free and smooth reset under elastic drive, maintaining a stable initial fit with the linkage handle and ensuring the consistency and reliability of the interlock device's cyclic operation.

[0099] Reference Figures 4 to 5 In some examples, the first interlock plate 6 and the second interlock plate 7 are coaxial and side by side, the first unlocking part 62 extends to the side of the second interlock plate 7 near the second circuit breaker 2, and the second unlocking part 72 extends to the side of the first interlock plate 6 near the first circuit breaker 1.

[0100] The first interlocking plate 6 and the second interlocking plate 7 are arranged coaxially and side by side, and the first unlocking part 62 and the second unlocking part 72 are arranged in a cross-extending layout. This allows the unlocking part to act on the corresponding release mechanism across the sides within a compact assembly space, which not only avoids interference of the interlocking plate movement, but also optimizes the spatial arrangement and greatly improves the structural compactness of the interlocking device and the accuracy of the interlocking action.

[0101] Specifically, the first linkage handle 4 and the first interlock plate 6 are arranged near the first circuit breaker 1, and the second linkage handle 5 and the second interlock plate 7 are arranged near the second circuit breaker 2. The first interlock plate 6 and the second interlock plate 7 are rotatably assembled in the housing 3 in a coaxial and parallel manner. The first unlocking part 62 extends toward the direction of the second circuit breaker 2 and is connected to the second tripping mechanism 22. The second unlocking part 72 extends toward the direction of the first circuit breaker 1 and is connected to the first tripping mechanism 12, forming a staggered and cross unlocking triggering layout.

[0102] This configuration facilitates timely responses from the first linkage handle 4 and the first interlock plate 6 to the opening and closing operations of the first circuit breaker 1, while also enabling accurate unlocking of the second tripping mechanism 22 via the first unlocking part 62. Similarly, it facilitates timely responses from the second linkage handle 5 and the second interlock plate 7 to the opening and closing operations of the second circuit breaker 2, while also enabling accurate unlocking of the first tripping mechanism 12 via the second unlocking part 72. The two sets of interlock plates do not interfere with each other within their rotational stroke, allowing for cross-side unlocking triggering within the limited space of the housing 3. This satisfies the requirements of bidirectional interlocking while maximizing the overall volume of the compression device, improving structural integration and operational stability.

[0103] Reference Figure 10 In some examples, the housing 3 is provided with a first clearance hole 33, and the first release mechanism 12 includes a first linkage post 121, the part of the first linkage post 121 extending into the first clearance hole 33 is located on the rotation path of the second unlocking part 72.

[0104] The arrangement of the first clearance hole 33 and the first linkage column 121, combined with the transmission cooperation between the second unlocking part 72 and the first linkage column 121, enables the second interlock plate 7 to trigger the first tripping mechanism 12 without interference within a limited assembly space. This optimizes the utilization of structural space and ensures accurate and smooth unlocking action, effectively improving the reliability of the first circuit breaker 1's tripping action when the second circuit breaker 2 is closed.

[0105] Specifically, refer to Figure 6 The housing 3 has a first clearance hole 33 on the side near the first circuit breaker 1. The first tripping mechanism 12 includes a tripping latch, a locking latch, and a first linkage post 121 disposed on the locking latch. The first linkage post 121 moves synchronously with the locking latch and extends into the housing 3 through the first clearance hole 33. The first clearance hole 33 is an oblong hole with an arc to match the range of motion of the first linkage post 121 as it rotates with the locking latch.

[0106] Furthermore, referring to Figure 10 The portion of the first linkage column 121 extending out of the first clearance hole 33 is precisely positioned on the rotation path of the second unlocking part 72, as shown in the reference. Figure 2 When the first circuit breaker 1 is in the open state, the first linkage column 121 is in the first position, as shown in the reference. Figure 6 When the first circuit breaker 1 is in the closed state, the first linkage column 121 is in the second position.

[0107] The second unlocking part 72 is configured as a lever. During the rotation of the second interlock plate 7, the lever can move the first linkage column 121 from the second position to the first position, thereby causing the first circuit breaker 1 to open or preventing the first circuit breaker 1 from closing.

[0108] Reference Figure 3 In some examples, the housing 3 is provided with a second clearance hole 34, and the first unlocking part 62 is provided with a second linkage post 621. The second linkage post 621 extends out of the second clearance hole 34 and is connected to the second release mechanism 22.

[0109] The arrangement of the second clearance hole 34 and the second linkage column 621 facilitates the first unlocking part 62 to act directly on the second release mechanism 22 through the second linkage column 621. This allows the first interlock plate 6 to trigger and unlock the second release mechanism 22 without interference within a limited assembly space. This not only saves assembly space but also features efficient and stable transmission.

[0110] Reference Figure 3 The second clearance hole 34 is opened on the side of the housing 3 near the second circuit breaker 2. The first unlocking part 62 extends from the first interlock plate 6 to the side near the second circuit breaker 2. The side of the first unlocking part 62 facing the second circuit breaker 2 has an integrally formed second linkage post 621. The free end of the second linkage post 621 passes through the second clearance hole 34 and extends into the second circuit breaker 2. The second linkage post 621 can directly act on the latch or trip latch in the second tripping mechanism 22 without the need for additional intermediate transmission components. It has the characteristics of simple structure and high transmission efficiency.

[0111] The second clearance hole 34 is also formed as a curved, waist-shaped hole to match the range of motion of the latch in the second linkage post 621 and the second release mechanism 22. (Refer to...) Figure 3 When the first circuit breaker 1 is in the open state, the first linkage handle 4 and the first interlock plate 6 are both in the open position, and the second linkage pin 621 is in the third position in the second clearance hole 34, which does not affect the second tripping mechanism 22. When the first circuit breaker 1 is closed, the second linkage pin 621 moves from the third position to the fourth position, so as to unlock the second tripping mechanism 22 or prevent the second tripping mechanism 22 from closing and locking.

[0112] By cooperating with the first linkage column 121 and the first tripping mechanism 12, and with the second linkage column 621 and the second tripping mechanism 22, it is possible to ensure that only one circuit breaker can be closed at a time, while preventing two circuit breakers from closing simultaneously, thus effectively improving the safety of the main and backup power supplies.

[0113] Reference Figure 10 In some examples, the second tripping mechanism 22 includes a reset member 221, a latch and a tripping latch. The reset member 221 is connected to the latch and has a insertion slot. The second linkage post 621 is inserted into the insertion slot to drive the latch and tripping latch to unlock through the reset member 221.

[0114] The reset component 221 allows the second linkage column 621 to act on the reset component 221, forming an intermediate transmission buffer. This prevents the unlocking force of the first unlocking part 62 from directly impacting components such as the latch and trip latch. This not only preserves the overload and short-circuit tripping function of the second circuit breaker 2, but also reduces wear on major components and improves assembly tolerance and the versatility of the interlocking device.

[0115] The second tripping mechanism 22, like the first tripping mechanism 12, has a latch and a trip latch, both of which achieve circuit breaker closing lockout through locking of the latch and trip latch. The second tripping mechanism 22 is also provided with a reset member 221, which is located on the side of the latch near the second clearance hole 34. The reset member 221 is fixedly connected to the latch, and the driving force received by the reset member 221 can be transmitted to the latch without loss.

[0116] The insertion groove is opened on the side of the reset member 221 near the second clearance hole 34, and the insertion groove is connected to the second clearance hole 34. The insertion groove is also opened as an arc-shaped groove to match the second clearance hole 34, so as to adapt to the movement range of the second linkage column 621 and the latch.

[0117] After the second linkage post 621 extends through the second clearance hole 34, it is inserted into the insertion slot. During the process of the first interlock plate 6 driving the second linkage post 621 to rotate, the second linkage post 621 drives the reset member 221 to move by abutting against the groove wall of the insertion slot. Then, the reset member 221 drives the latch to move, so that the latch and the jump latch are disengaged, and the unlocking action of the second release mechanism 22 is completed.

[0118] Reference Figure 11 and Figure 12 In some examples, when the first linkage handle 4 rotates to the closed position with the first handle 11, the reaction force of the first interlock plate 6 on the first drive rod 42 is directed in the direction of maintaining the first linkage handle 4 in the closed position. When the second linkage handle 5 rotates to the closed position with the second handle 21, the reaction force of the second interlock plate 7 on the second drive rod 52 is directed in the direction of maintaining the second linkage handle 5 in the closed position.

[0119] The above scheme can maintain the stability of the closed position by utilizing the structural dead point when the first linkage handle 4 or the second linkage handle 5 is rotated to the closed position, reducing the risk that the first linkage handle 4 or the second linkage handle 5 will easily spring back to the open position, which is conducive to improving the reliability of the interlocking device and the two circuit breakers, and ensuring stable power supply.

[0120] Reference Figure 11 and Figure 12 Taking the first linkage handle 4, the first drive rod 42 and the first interlock plate 6 as an example, the first linkage handle 4 rotates synchronously with the first handle 11 of the first circuit breaker 1. When the first linkage handle 4 and the first handle 11 rotate to the closing position, the first circuit breaker 1 is in the closed state, and the second circuit breaker 2 is in the corresponding open state.

[0121] During the rotation of the first linkage handle 4 with the first handle 11, the first drive rod 42 pushes the first interlock plate 6 to rotate around the rotation center of the first interlock plate 6. The first interlock plate 6 is provided with an elastic element 8 on the side opposite to the first drive rod 42. During the process of pushing the first interlock plate 6, the first drive rod 42 will be subjected to the reaction force provided by the elastic element 8.

[0122] like Figure 11 and Figure 12 As shown, during the rotation of the first linkage handle 4, the reaction force is always biased towards the closed position based on the axis of the first linkage handle 4. The component force generated by this reaction force will hinder the first linkage handle 4 from rotating to the closed position. When the first linkage handle 4 is fully rotated to the closed position, the contact position between the first drive rod 42 and the first receiving part 61 changes, causing the separation to be biased towards the open position. The component force will further maintain the first linkage handle 4 in the closed position, thereby preventing the first linkage handle 4 from becoming loose or rotating accidentally, which helps to ensure the reliability of the interlocking device.

[0123] The second linkage handle 5, the second drive rod 52, the second interlock plate 7, and the second handle 21 are connected in the same way as above and have the same technical effect, so they will not be described again here.

[0124] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A circuit breaker interlock device, characterized by, Located between adjacent first and second circuit breakers, the first circuit breaker includes a first handle and a first tripping mechanism, and the second circuit breaker includes a second handle and a second tripping mechanism. The circuit breaker interlocking device includes a housing. The first linkage handle is rotatably disposed inside the housing and includes a first extension rod and a first drive rod, wherein the first extension rod is connected to the first handle. The second linkage handle is rotatably disposed inside the housing and includes a second extension rod and a second drive rod, wherein the second extension rod is connected to the second handle. The first interlock plate is rotatably disposed within the housing and includes a first receiving part and a first unlocking part. The first receiving part abuts against the first driving rod, and the first unlocking part is connected to the second release mechanism. The second interlock plate is rotatably disposed inside the housing and includes a second receiving part and a second unlocking part. The second receiving part abuts against the second drive rod, and the second unlocking part is connected to the first release mechanism. When the first linkage handle rotates with the first handle to close the circuit, it applies force to the first receiving part through the first driving rod to drive the first interlock plate to rotate, and drives the second release mechanism to release through the first unlocking part; When the second linkage handle rotates with the second handle to close the circuit, it applies force to the second receiving part through the second drive rod to drive the second interlock plate to rotate, and drives the first tripping mechanism to trip through the second unlocking part.

2. The circuit breaker interlocking device according to claim 1, characterized in that, The first handle, the first linkage handle, the second linkage handle, and the second handle are rotatably arranged on the same axis. The first handle is provided with a first insertion hole, and the first extension rod is inserted into the first insertion hole. The second handle is provided with a second insertion hole, and the second extension rod is inserted into the second insertion hole.

3. The circuit breaker interlocking device according to claim 1, characterized in that, The first drive rod has a first protrusion on the side near the first receiving part. The top of the first protrusion and the end of the first drive rod are both provided with arc-shaped contact surfaces. During the rotation of the first linkage handle, the first protrusion and the end of the first drive rod abut against the first receiving part in sequence.

4. The circuit breaker interlocking device according to claim 3, characterized in that, The second drive rod has a second protrusion on the side near the second receiving part. The top of the second protrusion and the end of the second drive rod are both provided with arc-shaped contact surfaces. During the rotation of the second linkage handle, the second protrusion and the end of the second drive rod abut against the second receiving part in sequence.

5. The circuit breaker interlocking device according to any one of claims 1-4, characterized in that, It also includes an elastic element, which includes a fixed end, an energy storage part, a first lever arm and a second lever arm. The fixed end and the energy storage part are fixed inside the housing. The first lever arm abuts against the side of the first interlock plate opposite to the side where the first receiving part is located, and the second lever arm abuts against the side of the second interlock plate opposite to the side where the second receiving part is located.

6. The circuit breaker interlocking device according to claim 5, characterized in that, The first interlocking plate is provided with a first abutting boss, and the second interlocking plate is provided with a second abutting boss. The top surfaces of the first abutting boss and the second abutting boss are both arc surfaces. The first lever arm abuts against the arc surface of the first abutting boss, and the second lever arm abuts against the arc surface of the second abutting boss.

7. The circuit breaker interlocking device according to any one of claims 1-4, characterized in that, The first interlock plate and the second interlock plate are coaxial and arranged side by side. The first unlocking part extends to the side of the second interlock plate near the second circuit breaker, and the second unlocking part extends to the side of the first interlock plate near the first circuit breaker.

8. The circuit breaker interlocking device according to claim 7, characterized in that, The housing is provided with a first clearance hole, and the first release mechanism includes a first linkage post, the part of the first linkage post extending into the first clearance hole is located on the rotation path of the second unlocking part.

9. The circuit breaker interlocking device according to claim 8, characterized in that, The housing is provided with a second clearance hole, and the first unlocking part is provided with a second linkage post. The second linkage post extends out of the second clearance hole and is connected to the second release mechanism.

10. The circuit breaker interlocking device according to any one of claims 1-4, characterized in that, When the first linkage handle rotates to the closed position with the first handle, the reaction force of the first interlock plate on the first drive rod is directed in the direction of maintaining the first linkage handle in the closed position; When the second linkage handle rotates to the closed position with the second handle, the reaction force of the second interlock plate on the second drive rod is directed in the direction of maintaining the second linkage handle in the closed position.

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