A circuit breaker with interlocking device and an interlocking system

Abstract

A circuit breaker and interlocking system with an interlocking device belong to the field of low-voltage electrical appliance technology. It includes a circuit breaker body, an operating mechanism mounted on the front side of the circuit breaker body, a trip lever on the operating mechanism, and a mechanical interlocking device mounted on one side of the circuit breaker body. The trip lever cooperates with the mechanical interlocking device. The mechanical interlocking device includes a mounting plate with an interlocking shaft mounted on it. First and second rocker arms are mounted on the interlocking shaft, and a linkage disc is rotatably mounted on the interlocking shaft, located between the first and second rocker arms. When both the first and second rocker arms are actuated, the linkage disc drives the interlocking shaft to rotate, thereby locking the circuit breaker in the open state. When only one of the first or second rocker arms is actuated, the linkage disc only rotates itself but does not drive the interlocking shaft to rotate, thus failing to lock the circuit breaker in the open state. Advantages: It meets various interlocking requirements between multiple circuit breakers and reliably implements various interlocking requirements.

Description

Technical Field

[0001] This invention belongs to the field of low-voltage electrical technology, specifically relating to a circuit breaker and interlocking system with an interlocking device. Background Technology

[0002] In low-voltage distribution cabinets, it is often necessary to install three universal circuit breakers, and these circuit breakers need to be mechanically interlocked. The interlocking requirements include the following scenarios: First, when two of the three circuit breakers are closed, the third cannot be closed; second, when one is closed, the other two cannot be closed; third, when one of the two primary power circuit breakers is closed, the backup power circuit breaker cannot be closed, and when the backup power circuit breaker is closed, neither of the two primary power circuit breakers can be closed. To accommodate these diverse interlocking requirements, the mechanical interlocking mechanism itself must possess corresponding structural features to achieve these functions.

[0003] Among these requirements, mechanical interlocking devices must possess a linkage structure that can meet the aforementioned interlocking requirements and reliably realize various interlocking needs. However, the linkage structure in mechanical interlocking devices has long been a challenge for those skilled in the art. Therefore, the applicant has developed a beneficial design, and the technical solution described below arose from this context. Summary of the Invention

[0004] The objective of this invention is to provide a circuit breaker and an interlocking system with an interlocking device. The circuit breaker has a mechanical interlocking device on one side. The input end of the mechanical interlocking device has an interlocking shaft with a rotating linkage disc on the interlocking shaft. The two input ends cooperate with the interlocking shaft through the linkage disc.

[0005] The present invention achieves its objective by providing a circuit breaker with an interlocking device, comprising a circuit breaker body and an operating mechanism mounted on the front side of the circuit breaker body. When the operating mechanism is activated, it drives the main shaft of the circuit breaker to rotate. The rotation of the main shaft then drives the contact system within the circuit breaker body to rotate. A tripping lever is provided on the operating mechanism, and a mechanical interlocking device is installed on one side of the circuit breaker body. The tripping lever cooperates with the mechanical interlocking device. The mechanical interlocking device includes a mounting plate on which an interlocking shaft is mounted. A first swing arm and a second swing arm are mounted on the interlocking shaft. A linkage disc is rotatably mounted on the interlocking shaft, located between the first and second swing arms. When both the first and second swing arms are activated, the linkage disc drives the interlocking shaft to rotate, thereby locking the circuit breaker in the open state. When only one of the first or second swing arms is activated, the linkage disc only rotates itself but does not drive the interlocking shaft to rotate, thus failing to lock the circuit breaker in the open state.

[0006] In a specific embodiment of the present invention, the interlocking shaft rotates along its own axis, and the linkage disk is disposed on the interlocking shaft in the radial direction. When only one of the first and second swing rods rotates, the linkage disk rotates with the radial direction of the interlocking shaft as its rotation center. When both the first and second swing rods move, the rotation of the linkage disk is restricted, and the linkage disk flips along the axis of the interlocking shaft, thereby driving the interlocking shaft to rotate.

[0007] In another specific embodiment of the present invention, the interlocking shaft includes a shaft body and a protruding end. The shaft body is rotatably configured with respect to the mounting plate, and the protruding end is located on the side away from the circuit breaker body. The protruding end is used to install the first swing arm, the second swing arm, and the linkage plate.

[0008] In another specific embodiment of the present invention, the linkage disc includes a pivot shaft and a disc body, the pivot shaft passing through the disc body and installed in the receiving hole at the protruding end of the interlocking shaft, while the disc body is located outside the interlocking shaft.

[0009] In another specific embodiment of the present invention, the pivot shaft includes a mating head, a torsion spring mounting hole, and a retaining ring groove. The mating head is used to install with the disc body, the torsion spring mounting hole is used to install a torsion spring to provide restoring force, and the retaining ring groove is used to install a retaining ring.

[0010] In another specific embodiment of the present invention, the disc body is provided with a pushing boss and a pushing edge. The pushing boss is a pair, which respectively cooperate with the first swing rod and the second swing rod. The pushing edge is a pair, which respectively cooperate with the first swing rod and the second swing rod.

[0011] In a further specific embodiment of the present invention, the first swing rod is provided with a first rotating hole, the first rotating hole being fitted onto the protruding end, and the first swing rod is also provided with a first mating hole; the second swing rod is provided with a second rotating hole, the second rotating hole being fitted onto the protruding end, and the second swing rod is also provided with a second mating hole, the first mating hole corresponding to the second mating hole.

[0012] In a more specific embodiment of the present invention, a first pressing edge is provided at the edge of the first rotating hole, and a second pressing edge is provided at the edge of the second rotating hole. The first pressing edge and the second pressing edge are respectively pressed and engaged with a pair of pressing edges on the disc body.

[0013] In yet another specific embodiment of the present invention, a weir extends from the second swing arm, and the weir can cover the linkage disc within it.

[0014] The present invention also relates to an interlocking system comprising three circuit breakers with interlocking devices, the mechanical interlocking devices of the three circuit breakers being connected by ropes to transmit signals; and the swing arms of two circuit breakers being connected by ropes to the first swing arm and the second swing arm of the third circuit breaker respectively.

[0015] The present invention has the following advantages due to the above-mentioned structure: the operating mechanism is provided with a tripping lever, and a mechanical interlocking device is provided on one side of the circuit breaker. The tripping lever cooperates with the mechanical interlocking device. The input end of the mechanical interlocking device has an interlocking shaft, and the interlocking shaft has a rotating linkage disc. The two input ends cooperate with the interlocking shaft through the linkage disc to meet various interlocking requirements between multiple circuit breakers and reliably realize various interlocking requirements. Attached Figure Description

[0016] Figure 1 A schematic diagram of the circuit breaker described in this invention is shown.

[0017] Figure 2 A schematic diagram of the front side of the mechanical interlocking device described in this invention is shown.

[0018] Figure 3 A schematic diagram of the structure on the other side of the front of the mechanical interlocking device described in this invention is shown.

[0019] Figure 4 A schematic diagram of the reverse side of the mechanical interlocking device described in this invention is shown.

[0020] Figure 5 A three-dimensional schematic diagram of the mechanical interlocking device described in this invention is shown.

[0021] Figure 6 A schematic diagram of the interlocking shaft described in this invention is shown.

[0022] Figure 7 A schematic diagram of the structure of the first pendulum rod of the present invention is shown.

[0023] Figure 8 A schematic diagram of the structure of the second pendulum rod of the present invention is shown.

[0024] Figure 9 A schematic diagram of the linkage disk of the present invention is shown.

[0025] Figure 10 A schematic diagram of the mechanical interlocking device of the present invention at the initial stage of operation is shown.

[0026] Figure 11 A schematic diagram of the mechanical interlocking device of the present invention during operation is shown.

[0027] In the diagram: 1. Circuit breaker body; 2. Operating mechanism; 3. Main shaft; 4. Tripping lever; 5. Mechanical interlocking device; 51. Mounting plate; 511. Extending shaft; 512. Limiting plate; 52. Interlocking shaft; 521. Shaft body; 522. Protruding end; 5221. Receiving hole; 523. Mounting end; 5231. Fixing hole; 524. Bayonet; 531. First swing arm; 5311. First rotating hole; 5312. First tension spring abutment hole; 5313. First mating hole; 5314. First rope mounting hole; 5315. First push edge; 532. Second swing arm; 5321. 5322. Second rotating hole; 5323. Second tension spring abutment hole; 5324. Second mating hole; 5325. Second rope mounting hole; 5326. Second push edge; 5327. Cofferdam; 533. Tension spring; 54. Swing rod; 541. Torsion spring; 55. Swing plate; 56. Sliding plate; 57. Mating rod; 58. Mounting shaft; 59. Pivot shaft; 6. Linkage disc; 61. Pivot shaft; 611. Mating head; 612. Torsion spring mounting hole; 613. Snap ring groove; 62. Disc body; 621. Push boss; 622. Push edge; 100. Rope. Detailed Implementation

[0028] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the description of the embodiments is not a limitation on the technical solution. Any formal but not substantive changes made based on the concept of the present invention should be considered within the scope of protection of the present invention.

[0029] In the following description, all directional or orientational concepts involving up, down, left, right, front, and back are based on the positions shown in the corresponding figures, and therefore should not be construed as a special limitation on the technical solutions provided by this invention.

[0030] like Figure 1 This invention relates to a circuit breaker with an interlocking device, comprising a circuit breaker body 1 and an operating mechanism 2 installed on the front side of the circuit breaker body 1. A main shaft 3 is provided between the circuit breaker body 1 and the operating mechanism 2. After the operating mechanism 2 is activated, it drives the main shaft 3 to rotate. After the main shaft 3 rotates, it drives the contact system inside the circuit breaker body 1 to operate, thereby realizing the closing and opening of the circuit breaker.

[0031] The operating mechanism 2 is also equipped with a tripping lever 4. When the circuit breaker is in the closed state, an external signal drives the tripping lever 4 to actuate. After the tripping lever 4 actuates, the operating mechanism 2 performs a tripping action. If the tripping lever 4 is pressed and cannot return, the operating mechanism 2 is locked in the open state and cannot perform a closing action.

[0032] A mechanical interlocking device 5 is installed on one side of the circuit breaker body 1. This mechanical interlocking device 5 cooperates with the main shaft 3 and also with the tripping lever 4. When the main shaft 3 is in the closed state, the mechanical interlocking device 5 outputs a signal to other circuit breakers. When other circuit breakers are in the closed state, the mechanical interlocking device 5 locks this circuit breaker in a non-closing state. If mechanical interlocking devices 5 are installed on one side of multiple circuit breaker bodies 1 and connected by ropes 100, mechanical interlocking between multiple circuit breakers can be achieved. The part of the mechanical interlocking device 5 that receives external signals and actuates the tripping lever 4 is called the signal input terminal of the mechanical interlocking device 5. The part of the mechanical interlocking device 5 that is activated by the rotation of the main shaft 3 of the circuit breaker and sends signals to other circuit breakers via the ropes 100 is called the signal output terminal of the mechanical interlocking device 5.

[0033] like Figure 2 , Figure 3 and Figure 4 The mechanical interlocking device 5 includes a mounting plate 51, on which an interlocking shaft 52 is mounted. A first swing arm 531 and a second swing arm 532 are mounted on the interlocking shaft 52. When both the first swing arm 531 and the second swing arm 532 rotate, they push the interlocking shaft 52 to rotate. The interlocking shaft 52 passes through the mounting plate 51 and a swing plate 55 is fixed at one end near the circuit breaker body 1. The swing plate 55 drives the sliding plate 56 to slide, thereby triggering the trip lever 4 to operate and locking the circuit breaker in the open state. This structure constitutes the input end of the mechanical interlocking device 5.

[0034] A swing rod 54 is also provided on the mounting plate 51, and the swing rod 54 is rotatably mounted on the mounting plate 51. Specifically, the swing rod 54 is mounted on a pivot shaft 59, which is rotatably mounted on the mounting plate 51. A cooperating rod 57 is fixed to one end of the pivot shaft 59 that extends through the mounting plate 51. The cooperating rod 57 cooperates with the main shaft 3, and the two rotate synchronously. Thus, when the main shaft 3 rotates to the closed state, the cooperating rod 57 also rotates in the same way, and drives the swing rod 54 to rotate through the pivot shaft 59, transmitting a signal to other circuit breakers through the rope 100. The above structure is the output end of the mechanical interlocking device 5.

[0035] Specifically, the swing arm 54 achieves its own return through a torsion spring 541, while the first swing arm 531 and the second swing arm 532 achieve their own return through a tension spring 533.

[0036] The first swing arm 531 and the second swing arm 532 are levers, one swing end of which is connected to the tension spring 533, and the other swing end is used to install the rope 100, which is connected to the mechanical interlocking device 5 of other circuit breakers that perform mechanical interlocking.

[0037] Similarly, the swing arm 54 is also a lever, and a rotating end of the swing arm 54 is used to install the rope 100, which is connected to the mechanical interlocking device 5 of other circuit breakers that perform mechanical interlocking.

[0038] An extension shaft 511 is fixed on the mounting plate 51, and the extension shaft 511 is used to connect the other end of the tension spring 533. A limiting plate 512 is also installed on the mounting plate 51. The limiting plate 512 is a protruding plate with a hole through which the rope 100 passes, thereby facilitating the installation and limitation of the rope 100.

[0039] On the side of the mounting plate 51 near the circuit breaker body 1, there are a plurality of protruding mounting shafts 58. The mounting shafts 58 are used to realize the installation between the mechanical interlocking device 5 and the circuit breaker body 1 and to ensure the gap between the two.

[0040] like Figure 5 The technical innovation of this invention lies in the fact that a linkage disc 6 is rotatably provided in the radial direction of the interlocking shaft 52. The linkage disc 6 is located between the first swing rod 531 and the second swing rod 532 and cooperates with both the first swing rod 531 and the second swing rod 532. When both the first swing rod 531 and the second swing rod 532 swing, that is, when the circuit breakers connected to them close at the same time, the linkage disc 6 drives the interlocking shaft 52 to rotate, pressing the trip lever 4 to act.

[0041] Specifically, the tripping lever 4 can only be activated by the sliding of the swing plate 55 and sliding plate 56, locking the circuit breaker in the open state, when the interlocking shaft 52 rotates. For this technical solution, to trigger the rotation of the interlocking shaft 52, both the first swing rod 531 and the second swing rod 532 must receive external signals and be pulled by the rope 100 to rotate. The addition of the linkage plate 6 is to satisfy the above logical coordination relationship. That is, the linkage plate 6 ensures that the interlocking shaft 52 can only rotate when both the first swing rod 531 and the second swing rod 532 rotate.

[0042] See you later Figure 5The interlocking shaft 52 rotates by rolling around its own axis (X-axis). The linkage disc 6 is mounted on the interlocking shaft 52. Specifically, the linkage disc 6 is positioned radially on the interlocking shaft 52, with its rotation center along the Y-axis of the radial direction of the interlocking shaft 52. When only one of the first and second rocker arms 531 rotates, the force on the linkage disc 6 is only located on one side of the linkage disc 6. The linkage disc 6 only rotates around the Y-axis, that is, it rotates around the radial direction of the interlocking shaft 52. This rotation does not cause the interlocking shaft 52 to rotate; it only causes the linkage disc 6 to rotate.

[0043] When both the first swing arm 531 and the second swing arm 532 are activated, two forces are generated on both sides of the linkage disc 6. These two forces restrict the rotation of the linkage disc 6, causing it to rotate along the axis of the interlocking shaft 52 and thus rotating the interlocking shaft 52. This is equivalent to applying a torque to the linkage disc 6 that causes the interlocking shaft 52 to rotate around the X-axis. Consequently, the rotation of the interlocking shaft 52 ultimately forces the trip lever 4 to activate, locking the circuit breaker in the open state.

[0044] like Figure 6 This is a schematic diagram of the interlocking shaft 52, which includes a shaft body 521 and a protruding end 522. The shaft body 521 is cylindrical and rotatably mounted with the mounting plate 51. Specifically, a circular rotating hole is provided on the mounting plate 51, and the shaft body 521 mates with this hole. The protruding end 522 is located on the side away from the circuit breaker body 1. A first swing rod 531 and a second swing rod 532 are fitted onto the protruding end 522, and both the first and second swing rods can rotate relative to the protruding end 522. A mounting end 523 is provided on the end of the shaft body 521 away from the protruding end 522. A fixing hole 5231 is provided on the mounting end 523 for mounting the swing plate 55. The mounting is completed by screwing a screw into the fixing hole 5231, thereby achieving the effect of synchronous rotation between the swing plate 55 and the interlocking shaft 52.

[0045] A receiving hole 5221 is provided in the radial direction of the protruding end 522. The receiving hole 5221 is used to install the linkage disk 6, that is, the linkage disk 6 is rotatably installed above the receiving hole 5221.

[0046] like Figure 7The first swing arm 531 is plate-shaped and has a first rotating hole 5311, which fits onto the protruding end 522. The first swing arm 531 also has a first tension spring abutment hole 5312, a first mating hole 5313, and a first rope mounting hole 5314. The first tension spring abutment hole 5312 is used for tension spring abutment, and the first rope mounting hole 5314 is used for rope mounting. A first pressing edge 5315 is provided at the edge of the first rotating hole 5311.

[0047] like Figure 8 Similarly, the second swing arm 532 is plate-shaped and has a second rotating hole 5321, which fits onto the protruding end 522. The second swing arm 532 also has a second tension spring abutment hole 5322, a second mating hole 5323, and a second rope mounting hole 5324. The second tension spring abutment hole 5322 is used for tension spring abutment, and the second rope mounting hole 5324 is used for rope mounting. A second pressing edge 5325 is provided at the edge of the second rotating hole 5321.

[0048] A dike 5326 extends from the second swing arm 532, which can cover the linkage disc 6 to prevent it from being disturbed by external forces. Of course, the dike 5326 can also be located on the first swing arm 531, or a combination of the two. Preferably, the dike 5326 is cylindrical.

[0049] like Figure 9 The linkage disk 6 is a component comprising a pivot shaft 61 and a disk body 62. The pivot shaft 61 passes through the disk body 62 and is installed in the receiving hole 5221. The disk body 62 is located outside the interlocking shaft 52. One end of the pivot shaft 61 is connected to the disk body 62, and the other end passes through the receiving hole 5221 and is locked with a snap ring, thus both the pivot shaft 61 and the disk body 62 are rotatable.

[0050] The pivot shaft 61 includes a mating head 611, a torsion spring mounting hole 612, and a retaining ring groove 613. The mating head 611 is used to install with the disc body 62, the torsion spring mounting hole 612 is used to install a torsion spring to provide restoring force, and the retaining ring groove 613 is used to install a retaining ring.

[0051] The disc body 62 is disc-shaped, and is provided with a pushing boss 621 and a pushing edge 622. The pushing boss 621 is a pair, which respectively cooperate with the first swing rod 531 and the second swing rod 532. The pushing edge 622 is also a pair, which respectively cooperate with the first swing rod 531 and the second swing rod 532.

[0052] like Figure 10 , Figure 11 This is a schematic diagram illustrating the operation of the present invention. Figure 10 In the initial state, neither the first rocker arm 531 nor the second rocker arm 532 is driven to move. At this time, the linkage plate 6 also does not move.

[0053] like Figure 11 The second rocker arm 532 is driven to move first. At this time, the second push edge 5325 pushes the push boss 621, causing the disc 62 to rotate clockwise. After the disc 62 rotates clockwise, the push boss 621 abuts against the lower part of the second push edge 5325, and the disc 62 cannot rotate back.

[0054] exist Figure 11 In the state where the first rocker arm 531 is also driven to move, the first push edge 5315 pushes the push edge 622 to cause the entire linkage plate 6 to swing, thereby causing the interlocking shaft 52 to rotate, which in turn causes the rocker plate 55 to swing. The rocker plate 55 causes the sliding plate 56 to slide, thereby triggering the tripping lever 4 to move and locking the circuit breaker in the tripped state.

[0055] If the first swing arm 531 moves first, it will similarly drive the interlocking shaft 52 to rotate, which will not be elaborated further here. If the first swing arm 531 and the second swing arm 532 swing simultaneously, the interlocking shaft 52 will also rotate. When only one of the first swing arm 531 and the second swing arm 532 moves, the linkage plate 6 only rotates itself, but will not drive the interlocking shaft 52 to rotate, and cannot lock the circuit breaker in the open state.

[0056] The technical solutions in the above embodiments satisfy the following three interlocking systems.

[0057] The first type of interlocking system features a characteristic that prevents the third circuit breaker from closing when two circuit breakers are closed. This interlocking system includes three circuit breakers equipped with interlocking devices. The mechanical interlocking devices 5 of the three circuit breakers are connected by ropes 100 to transmit signals. The swing rods 54 of the main shafts 3 of the two circuit breakers are respectively connected to the first swing rod 531 and the second swing rod 532 of the third circuit breaker via ropes 100. Thus, when the two circuit breakers are closed, the first swing rod 531 and the second swing rod 532 of the third circuit breaker are pulled and actuated. When the two circuit breakers are closed, the first swing rod 531 and the second swing rod 532 are pulled and swing. At this time, the first push edge 5315 and the second push edge 5325 both push the linkage disc 6, causing the linkage disc 6 to drive the interlocking shaft 52 to rotate, locking the third circuit breaker in a state where it cannot be closed, that is, locked in the open state.

[0058] For the second type of interlocking system, when the first circuit breaker closes but the second and third circuit breakers cannot close, the swing rod 54 of the main shaft 3 of the first circuit breaker is connected to the first swing rod 531 of the second and third circuit breakers respectively via two ropes 100. The first swing rod 531 and the second swing rod 532 of the second and third circuit breakers are pinned together. Due to the pin connection, the first swing rod 531 and the second swing rod 532 are in a synchronous swinging state. That is, if the first circuit breaker closes, the first swing rod 531 and the second swing rod 532 on the second and third circuit breakers will move simultaneously. The linkage disc 6 on the second and third circuit breakers will drive the interlocking shaft 52 to rotate, locking the third circuit breaker in a non-closing state, i.e., locked in the open state.

[0059] For the third type of interlocking system, when one of the two main power circuit breakers closes, the backup power circuit breaker cannot close; conversely, when the backup power circuit breaker closes, neither of the main power circuit breakers can close. This can also be achieved using a pin mechanism. Specifically, the swing rods 54 of the two main power circuit breakers, which are linked by their main shafts 3, are connected to the first swing rod 531 and the second swing rod 532 on the backup power circuit breaker via two ropes 100, and the first swing rod 531 and the second swing rod 532 on the backup power circuit breaker are pinned together. In this case, closing either main power circuit breaker will simultaneously rotate the first swing rod 531 and the second swing rod 532 on the backup power circuit breaker, locking the backup power circuit breaker in the open state. The swing arm 54 of the main shaft 3 of the standby power circuit breaker is connected to the first swing arm 531 of the two main power circuit breakers by two ropes 100 respectively. The first swing arm 531 and the second swing arm 532 on the two main power circuit breakers are connected by a pin. When the standby power circuit breaker is closed, the first swing arm 531 and the second swing arm 532 on the two main power circuit breakers move simultaneously, locking the main power circuit breaker in the open state.

Claims

1. A circuit breaker with an interlocking device, comprising a circuit breaker body (1) and an operating mechanism (2) installed on the front side of the circuit breaker body (1), wherein the operating mechanism (2) drives the main shaft (3) of the circuit breaker to rotate after being activated, and the main shaft (3) drives the contact system inside the circuit breaker body (1) to operate after being activated, a tripping lever (4) is provided on the operating mechanism (2), and a mechanical interlocking device (5) is installed on one side of the circuit breaker body (1), wherein the tripping lever (4) cooperates with the mechanical interlocking device (5); the mechanical interlocking device (5) includes a mounting plate (51), an interlocking shaft (52) is installed on the mounting plate (51), and a first swing arm (531) and a second swing arm (532) are provided on the interlocking shaft (52), characterized in that: A linkage disc (6) is rotatably mounted on the interlocking shaft (52), and the linkage disc (6) is located between the first rocker arm (531) and the second rocker arm (532). When both the first rocker arm (531) and the second rocker arm (532) move, the linkage disc (6) drives the interlocking shaft (52) to rotate, thereby locking the circuit breaker in the open state. When only one of the first rocker arm (531) and the second rocker arm (532) moves, the linkage disc (6) only rotates itself, but does not drive the interlocking shaft (52) to rotate, and cannot lock the circuit breaker in the open state. The linkage disk (6) rotates along its own axis and is arranged on the interlocking shaft (52) in the radial direction. When only one of the first rocker arm (531) and the second rocker arm (532) rotates, the linkage disk (6) rotates with the radial direction of the interlocking shaft (52) as the center of rotation. When both the first rocker arm (531) and the second rocker arm (532) move, the rotation of the linkage disk (6) is restricted, and the linkage disk (6) flips along the axis of the interlocking shaft (52) and drives the interlocking shaft (52) to rotate.

2. A circuit breaker with an interlocking device according to claim 1, characterized in that: The interlocking shaft (52) includes a shaft body (521) and a protruding end (522). The shaft body (521) is rotatably mounted with the mounting plate (51), and the protruding end (522) is located on the side away from the circuit breaker body (1). The protruding end (522) is used to mount the first rocker arm (531), the second rocker arm (532), and the linkage plate (6).

3. A circuit breaker with an interlocking device according to claim 2, characterized in that: The linkage disk (6) includes a pivot shaft (61) and a disk body (62). The pivot shaft (61) passes through the disk body (62) and is installed in the receiving hole (5221) of the protruding end (522) of the interlocking shaft (52), while the disk body (62) is located outside the interlocking shaft (52).

4. A circuit breaker with an interlocking device according to claim 3, characterized in that: The pivot shaft (61) includes a mating head (611), a torsion spring mounting hole (612), and a snap ring groove (613). The mating head (611) is used to install with the disc body (62), the torsion spring mounting hole (612) is used to install a torsion spring to provide restoring force, and the snap ring groove (613) is used to install a snap ring.

5. A circuit breaker with an interlocking device according to claim 3, characterized in that: The disc body (62) is provided with a push-pressing boss (621) and a push-pressing edge (622). The push-pressing boss (621) is a pair, which respectively cooperate with the first swing rod (531) and the second swing rod (532). The push-pressing edge (622) is a pair, which respectively cooperate with the first swing rod (531) and the second swing rod (532).

6. A circuit breaker with an interlocking device according to claim 3, characterized in that: The first swing rod (531) is provided with a first rotating hole (5311), which is fitted onto the protruding end (522). The first swing rod (531) is also provided with a first mating hole (5313). The second swing rod (532) is provided with a second rotating hole (5321), which is fitted onto the protruding end (522). The second swing rod (532) is also provided with a second mating hole (5323). The first mating hole (5313) corresponds to the second mating hole (5323).

7. A circuit breaker with an interlocking device according to claim 6, characterized in that: A first push edge (5315) is provided at the edge of the first rotating hole (5311), and a second push edge (5325) is provided at the edge of the second rotating hole (5321). The first push edge (5315) and the second push edge (5325) are respectively pushed and engaged with a pair of push edges (622) on the disc body (62).

8. A circuit breaker with an interlocking device according to claim 1, characterized in that: A cofferdam (5326) extends from the second swing arm (532), which can cover the linkage disc (6) within it.

9. An interlocking system, characterized in that: The circuit includes three circuit breakers with interlocking devices as described in any one of claims 1 to 8, wherein the mechanical interlocking devices (5) of the three circuit breakers are connected by ropes (100) to transmit signals; and the swing rods (54) of the main shafts (3) of the two circuit breakers are connected by ropes (100) to the first swing rod (531) and the second swing rod (532) of the third circuit breaker respectively.

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