Synchronous interlocking device of three-phase three-mechanism permanent magnet circuit breaker

Abstract

The invention discloses a synchronous interlocking device for a three-phase three-mechanism permanent magnet circuit breaker, and relates to the technical field of circuit breakers, the synchronous interlocking device comprises a fixing assembly and a synchronous interlocking mechanism, the fixing assembly comprises a frame body, and a plurality of partition plates are fixed in the frame body; the synchronous interlocking mechanism comprises a rotating shaft, the rotating shaft rotationally penetrates through the partition plates, a plurality of first crank arms are linearly fixed to the rotating shaft and hinged to insulating parts of three movable guide rods in the circuit breaker respectively, and the three movable guide rods are synchronously separated from or make contact with the three static ends of the three permanent magnets respectively. And three buffer mechanisms are further included, each buffer mechanism comprises a switching sleeve and a buffer spring, the peripheral wall of the static end is sleeved with the switching sleeve in a sliding mode, the buffer spring is connected between the static end and the inner wall of the switching sleeve, and the switching sleeves make intermittent contact with the movable guide rod. During closing, the movable guide rod is in contact with the adapter sleeve under the action of external force and then synchronously decelerates, so that rigid contact between the movable guide rod and the static end is prevented, and a shock-proof effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker technology, specifically a synchronous interlocking device for a three-phase, three-mechanism permanent magnet circuit breaker. Background Technology

[0002] A permanent magnet circuit breaker is an intelligent circuit breaker that uses a permanent magnet to provide holding force and combines it with electronic control to achieve rapid opening and closing. Compared with traditional spring or electromagnetic mechanism circuit breakers, it has advantages such as simple structure, fast operation, long service life, and low energy consumption, and is widely used in power systems, industrial power distribution, and new energy fields.

[0003] The existing patent "202411431584.8 A phase-controlled circuit breaker and its emergency tripping device" discloses a torque transmission mechanism, which transmits torque force and drives the output shaft of the permanent magnet mechanism to move linearly in the vertical direction towards the three-phase split direction of the permanent magnet mechanism through the driving tripping component, thereby realizing the tripping of the three-phase permanent magnet mechanism and ensuring that the circuit breaker achieves synchronous tripping of the three phases. However, during the operation of the device in the above patent, due to the impact force generated when the moving guide rod accelerates instantaneously and contacts the stationary end during closing, the overall device will vibrate. Long-term vibration can easily cause bolts, terminals, etc. to loosen, resulting in mechanical asynchrony and unstable operation of the equipment.

[0004] To address the above problems, this invention provides a synchronizing interlocking device for a three-phase, three-mechanism permanent magnet circuit breaker, thereby solving the aforementioned issues. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: a synchronous interlocking device for a three-phase, three-mechanism permanent magnet circuit breaker, comprising a fixed assembly and a synchronous interlocking mechanism. The fixed assembly includes a frame with multiple partitions fixed inside. The synchronous interlocking mechanism includes a rotating shaft that rotatably passes through the multiple partitions. Multiple crank arms are linearly fixed on the rotating shaft, and each crank arm is hinged to the insulating portion of three moving guide rods in the circuit breaker. The three moving guide rods synchronously separate or contact the three stationary ends of the three permanent magnets. The device also includes a buffer mechanism, comprising three components, each including a transition sleeve and a buffer spring. The transition sleeve is slidably fitted onto the peripheral wall of the stationary end, and the buffer spring is connected between the stationary end and the inner wall of the transition sleeve. The transition sleeve intermittently contacts the moving guide rods. During closing, the moving guide rods, under external force, contact the transition sleeves and then synchronously decelerate, preventing rigid contact between the moving guide rods and the stationary ends, thus achieving a vibration damping effect.

[0006] Furthermore, as a preferred embodiment, the adapter sleeve is configured in a cylindrical shape and is made of silver.

[0007] Furthermore, as a preferred embodiment, it also includes a damping mechanism, which is configured with three components, including a mounting plate, a slide rod, a pressure rod, and a damping spring. The mounting plate is fixed between two adjacent partitions, and the permanent magnet is fixed to the bottom of the mounting plate. An clearance hole is provided in the center of the mounting plate, and the adapter sleeve is slidably disposed in the clearance hole. A connecting hole is provided on the side wall of the clearance hole, and the slide rod slides through the connecting hole. The pressure rod slides through the slide rod, and one end of the pressure rod contacts the peripheral wall of the adapter sleeve. The damping spring is connected between the pressure rod and the inner wall of the slide rod.

[0008] When the circuit breaker is tripped, the sliding rod is driven by external force to increase the positive pressure between the pressure rod and the transfer sleeve, that is, the friction between the two increases, in order to prevent the transfer sleeve from rebounding excessively, thereby avoiding rebound closing.

[0009] Furthermore, preferably, the force of the damping spring is less than the force of the buffer spring.

[0010] Furthermore, preferably, one end of the pressure rod is configured as a rubber head.

[0011] Furthermore, as a preferred embodiment, it also includes a drive mechanism, which includes a motor fixed to one of the partitions. A linkage rod is fixed to the output end of the motor. A second crank arm is fixed to the peripheral wall of the rotating shaft. Guide grooves are provided on multiple partitions. A guide rod is slidably arranged in multiple guide grooves. Multiple sliding rods are fixed on the guide rod. A connecting lug is fixed on the guide rod. A connecting rod is hinged between one end of the linkage rod and the second crank arm. A connecting rod is hinged between the other end of the linkage rod and the connecting lug.

[0012] Furthermore, as a preferred embodiment, it also includes three support components, including a support plate and a hydraulic cylinder. The support plate is fixed between two adjacent partitions, the hydraulic cylinder is fixed on the support plate, and the output shaft of the hydraulic cylinder is assembled and fixed to the bottom of the permanent magnet.

[0013] Furthermore, as a preferred embodiment, it also includes a connecting frame and a plurality of movable wheels, wherein the connecting frame is symmetrically installed on both sides of the frame, and the plurality of movable wheels are symmetrically installed on the two connecting frames.

[0014] Furthermore, preferably, the top of the moving guide rod is connected to a conductive circuit, and the bottom of the permanent magnet is connected to a terminal block.

[0015] Compared with the prior art, the present invention provides a synchronizing interlocking device for a three-phase, three-mechanism permanent magnet circuit breaker, which has the following advantages:

[0016] 1. By using a buffer mechanism, when the circuit is closed, the moving guide rod and the transfer sleeve contact each other in an elastic manner. The impact energy between the two is absorbed by the buffer spring, preventing them from colliding rigidly and causing vibration, thus improving the stability and safety of the device operation.

[0017] 2. By combining the buffer mechanism and the damping mechanism, the rebound speed of the transfer sleeve is reduced by increasing friction during the opening of the circuit breaker, thereby preventing the transfer sleeve from re-contacting the moving guide rod under the action of inertia, thus avoiding abnormal closing, and preventing the moving guide rod from colliding with the transfer sleeve and causing vibration.

[0018] 3. By combining the buffer mechanism, damping mechanism and drive components, the opening and rebound limiting actions are performed simultaneously, and the closing and restriction removal actions are performed simultaneously, ensuring stable vibration reduction of the equipment during the opening and closing process. Attached Figure Description

[0019] Figure 1 A schematic diagram of a synchronous interlocking device for a three-phase, three-mechanism permanent magnet circuit breaker.

[0020] Figure 2 A schematic diagram of the synchronizing interlocking mechanism of a three-phase, three-mechanism permanent magnet circuit breaker synchronizing interlocking device.

[0021] Figure 3 A synchronous interlocking device for a three-phase, three-mechanism permanent magnet circuit breaker Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 This is a schematic diagram showing the structural distribution of the buffer mechanism and damping mechanism of a synchronous interlocking device for a three-phase, three-mechanism permanent magnet circuit breaker.

[0023] Figure 5 A synchronous interlocking device for a three-phase, three-mechanism permanent magnet circuit breaker Figure 4 Enlarged view of point B in the middle;

[0024] Figure 6 A schematic diagram showing the positional distribution of the drive mechanism of a synchronous interlocking device for a three-phase, three-mechanism permanent magnet circuit breaker.

[0025] Figure 7 A synchronous interlocking device for a three-phase, three-mechanism permanent magnet circuit breaker Figure 6 Enlarged diagram of point C in the middle.

[0026] In the diagram: 11. Frame; 12. Partition; 21. Rotating shaft; 22. Crank arm one; 23. Moving guide rod; 24. Permanent magnet; 25. Stationary end; 31. Adapter sleeve; 32. Buffer spring; 41. Mounting plate; 42. Slide rod; 43. Pressure rod; 44. Damping spring; 431. Rubber head; 51. Motor; 52. Linkage rod; 53. Crank arm two; 54. Guide rod; 121. Guide groove; 55. Connecting ear; 56. Linkage rod one; 57. Linkage rod two; 61. Support plate; 62. Hydraulic cylinder; 71. Connecting frame; 72. Moving wheel; 231. Conductive circuit; 241. Terminal block. Detailed Implementation

[0027] Reference Figures 1-7 The present invention provides a technical solution: a three-phase three-mechanism permanent magnet circuit breaker synchronizing interlocking device, including a fixed component and a synchronizing interlocking mechanism, including a frame 11, in which multiple partitions 12 are fixed; the synchronizing interlocking mechanism includes a rotating shaft 21, which rotatably passes through the multiple partitions 12, and multiple crank arms 22 are linearly fixed on the rotating shaft 21, and the multiple crank arms 22 are respectively hinged to the insulating parts of three moving guide rods 23 in the circuit breaker.

[0028] The rotating shaft 21 rotates under the action of external force, driving multiple crank arms 22 to quickly complete clockwise or counterclockwise rotation, thereby driving multiple moving guide rods 23 to move up or down synchronously, realizing the synchronous closing or synchronous opening of the three-phase permanent magnet circuit breaker.

[0029] In the above, to ensure that the moving guide rod 23 moves only in the vertical direction, a straight slot is provided on the crank arm 22. When the crank arm 22 drives the moving guide rod 23 to move, the insulating part of the moving guide rod 23 will move adaptively within the straight slot.

[0030] This application also includes a buffer mechanism, which is configured in three parts, including an adapter sleeve 31 and a buffer spring 32. The adapter sleeve 31 is slidably fitted onto the peripheral wall of the stationary end 25. The buffer spring 32 is connected between the stationary end 25 and the inner wall of the adapter sleeve 31, and the adapter sleeve 31 is in intermittent contact with the moving guide rod 23.

[0031] During synchronous closing, the rotating shaft 21 rotates rapidly counterclockwise under the action of external force, driving multiple moving guide rods 23 to move down synchronously. After the moving guide rods 23 contact the transfer sleeve 31, they move down synchronously with the transfer sleeve 31. During this period, under the damping action of the buffer spring 32, the moving guide rods 23 and the transfer sleeve 31 decelerate until they are in a prohibited state. During this process, the impact energy of the contact between the moving guide rods 23 and the transfer sleeve 31 will be dissipated through the deformation of the buffer spring 32. Therefore, the impact energy between the moving guide rods 23 and the transfer sleeve 31 is reduced, thereby preventing vibration during closing and improving the stability and safety of the device operation.

[0032] Furthermore, since the relative impact energy between the moving guide rod 23 and the adapter sleeve 31 is reduced, the degree of mutual impact damage between the moving guide rod 23 and the adapter sleeve 31 is reduced, thereby extending the service life of both the moving guide rod 23 and the adapter sleeve 31.

[0033] In a preferred embodiment, the adapter sleeve 31 is configured as a column and is made of silver.

[0034] In other words, the adapter sleeve 31 remains vertical during movement, thus maintaining full contact with the stationary end 25 and ensuring stable conduction between the stationary end 25 and the adapter sleeve 31. Moreover, the silver-coated adapter sleeve 31 has high conductivity, ensuring good conduction between the moving guide rod 23 and the stationary end 25.

[0035] In a preferred embodiment, a damping mechanism is also included, comprising three components: a mounting plate 41, a slide rod 42, a pressure rod 43, and a damping spring 44. The mounting plate 41 is fixed between two adjacent partitions 12, and the permanent magnet 24 is fixed to the bottom of the mounting plate 41. A clearance hole is provided in the center of the mounting plate 41, and the adapter sleeve 31 is slidably disposed within the clearance hole. A connecting hole is provided on the side wall of the clearance hole, and the slide rod 42 slides through the connecting hole. The pressure rod 43 slides through the slide rod 42, and one end of the pressure rod 43 contacts the peripheral wall of the adapter sleeve 31. The damping spring 44 is connected between the pressure rod 43 and the inner wall of the slide rod 42.

[0036] It should be considered that during synchronous tripping, the rotating shaft 21 rotates rapidly clockwise under the action of external force, driving multiple moving guide rods 23 to move upward synchronously. That is, the pressure above the transfer sleeve 31 is instantly removed, and the energy-storing buffer spring 32 releases its elastic potential energy, which in turn pushes the transfer sleeve 31 to accelerate upward. When it moves to the target tripping position, it will continue to move upward under the action of inertia, causing the transfer sleeve 31 to contact the moving guide rod 23 again, resulting in an abnormal closing situation during tripping and causing a short circuit fault.

[0037] Therefore, during synchronous opening, the pressure above the transfer sleeve 31 is instantly removed, and the slide rod 42 moves instantaneously into the connecting hole under the action of external force. The damping spring 44 is compressed and deformed, causing the pressure rod 43 to increase instantaneously on the transfer sleeve 31. As a result, the transfer sleeve 31 is damped by the pressure rod 43 during the rebound process, so that the transfer sleeve 31 can remain stationary when it rebounds to the target opening position. This prevents the transfer sleeve 31 from contacting the moving guide rod 23 again under the action of inertia, preventing abnormal closing and ensuring the stability of equipment operation. In addition, it can also prevent the moving guide rod 23 from continuing to move upward under the action of inertia and colliding with the transfer sleeve 31, thereby avoiding vibration.

[0038] In a preferred embodiment, the elastic force of the damping spring 44 is less than that of the buffer spring 32.

[0039] In other words, the sliding rod 42, through the damping spring 44, makes the frictional force of the pressure rod 43 on the transition sleeve 31 less than the elastic force of the buffer spring 32. Therefore, it can be ensured that during the deceleration period, the transition sleeve 31 can still be fully reset and spring back to the target opening position.

[0040] In a preferred embodiment, one end of the pressure rod 43 is configured as a rubber head 431.

[0041] It should be explained that the rubber head 431 can ensure a sufficient coefficient of friction with the adapter sleeve 31, and can also undergo elastic deformation when subjected to pressure, increasing the contact area with the adapter sleeve 31, making the two contact tightly and significantly reducing the deceleration effect.

[0042] In a preferred embodiment, a drive mechanism is also included, comprising a motor 51 fixed to one of the partitions 12. A linkage rod 52 is fixed to the output end of the motor 51. A second crank arm 53 is fixed to the peripheral wall of the rotating shaft 21. Guide grooves 121 are provided on the partitions 12. A guide rod 54 is slidably provided in the guide grooves 121. A plurality of sliding rods 42 are fixed on the guide rod 54. A connecting lug 55 is fixed on the guide rod 54. A connecting rod 56 is hinged between one end of the linkage rod 52 and the second crank arm 53. A connecting rod 57 is hinged between the other end of the linkage rod 52 and the connecting lug 55.

[0043] Please refer to details. Figure 7 When the circuit breaker is opened, the motor 51 starts and drives the linkage rod 52 to rotate clockwise by a certain angle. The linkage rod 52 drives the crank arm 53 to rotate clockwise through the first connecting rod 56. In turn, the crank arm 53 drives the rotating shaft 21 to rotate clockwise, realizing rapid circuit breaker opening. At the same time, the linkage rod 52 rotates clockwise and drives the guide rod 54 to move rapidly along the guide groove 121 towards the mounting plate 41 through the second connecting rod 57. Then, the three sliding rods 42 will squeeze the three damping springs 44 respectively, which increases the friction between the rubber head 431 and the adapter sleeve 31 instantaneously. Therefore, at the moment of circuit breaker opening, the excessive rebound of the adapter sleeve 31 can be limited simultaneously. That is, the two actions of circuit breaker opening and rebound limitation are carried out simultaneously to ensure stable shock absorption during the circuit breaker opening process.

[0044] Conversely, when closing the circuit, the motor 51 starts and drives the linkage rod 52 to rotate counterclockwise by a certain angle. The linkage rod 52 drives the crank arm 53 to rotate counterclockwise through the first connecting rod 56. In turn, the crank arm 53 drives the rotating shaft 21 to rotate counterclockwise, achieving rapid closing. At the same time, the linkage rod 52 rotates counterclockwise and drives the guide rod 54 to move away from the mounting plate 41 along the guide groove 121 through the second connecting rod 57. As a result, the three damping springs 44 will quickly return to their original positions, and the friction between the rubber head 431 and the adapter sleeve 31 will decrease instantly. This avoids excessive friction during the closing process, which would reduce the energy dissipation effect of the buffer spring 32. Therefore, the two actions of closing the circuit and removing the friction limit are performed simultaneously, ensuring stable shock absorption during the closing process.

[0045] In summary, the drive mechanism ensures stable vibration reduction during the opening and closing of the circuit breaker.

[0046] It should be noted that the closing stroke can be divided into a non-contact section and a buffer section, and the non-contact section stroke is longer than the buffer section stroke. In this application, in the non-contact closing section (when the moving guide rod 23 moves down but does not contact the adapter sleeve 31), the friction between the rubber head 431 and the adapter sleeve 31 will decrease rapidly, ensuring that in the buffer section (when the moving guide rod 23 contacts the adapter sleeve 31 and moves down synchronously), the resistance of the rubber head 431 to the adapter sleeve 31 will not affect the buffering effect.

[0047] In a preferred embodiment, three support members are also included, including a support plate 61 and a hydraulic cylinder 62. The support plate 61 is fixed between two adjacent partitions 12, and the hydraulic cylinder 62 is fixed on the support plate 61. The output shaft of the hydraulic cylinder 62 is assembled and fixed to the bottom of the permanent magnet 24.

[0048] In other words, the hydraulic cylinder 62 has a supporting function for the permanent magnet 24. Specifically, the hydraulic cylinder 62 and the mounting plate 41 can limit the upper and lower ends of the permanent magnet 24 to ensure that the permanent magnet 24 is in a stable state during equipment operation.

[0049] In a preferred embodiment, the system also includes a connecting frame 71 and a plurality of movable wheels 72. The connecting frame 71 is symmetrically mounted on both sides of the frame 11, and the plurality of movable wheels 72 are symmetrically mounted on the two connecting frames 71.

[0050] In other words, the overall equipment in this application can be moved freely by the mobile wheels 72, and is suitable for occasions that require rapid access / removal, such as mobile substations, emergency power vehicles, and temporary power distribution for exhibitions, reducing hoisting or transportation time. Moreover, during maintenance, the overall equipment can be directly pushed out of the cabinet without disassembling the busbar, shortening the power outage time.

[0051] In a preferred embodiment, the top of the moving guide rod 23 is connected to a conductive circuit 231, and the bottom of the permanent magnet 24 is connected to a terminal block 241.

[0052] The conductive circuit 231 and the terminal block 241 are designed to be connected to external electrical equipment, forming a conductive circuit.

[0053] Specifically, during the opening process, the motor 51 starts and drives the linkage rod 52 to rotate clockwise by a certain angle. The linkage rod 52 drives the crank arm 53 to rotate clockwise through the connecting rod 56, which in turn drives the rotating shaft 21 to rotate clockwise, achieving rapid opening. While the linkage rod 52 rotates clockwise, it drives the guide rod 54 to move rapidly along the guide groove 121 towards the mounting plate 41 through the connecting rod 57. As a result, the three sliding rods 42 will squeeze the three damping springs 44 respectively, and the friction between the rubber head 431 and the adapter sleeve 31 will increase instantaneously. This causes the adapter sleeve 31 to be damped by the rubber head 431 during the rebound process, ensuring that the adapter sleeve 31 remains stationary when it rebounds to the target opening position. This prevents the adapter sleeve 31 from contacting the moving guide rod 23 again under inertia, preventing abnormal closing and avoiding mutual collision.

[0054] When closing the circuit, the motor 51 starts and drives the linkage rod 52 to rotate counterclockwise by a certain angle. The linkage rod 52 drives the crank arm 53 to rotate counterclockwise through the first connecting rod 56. In turn, the crank arm 53 drives the rotating shaft 21 to rotate counterclockwise, realizing rapid closing. At the same time, the linkage rod 52 rotates counterclockwise and drives the guide rod 54 to move away from the mounting plate 41 along the guide groove 121 through the second connecting rod 57. Then, the three damping springs 44 will quickly return to their original state, and the friction between the rubber head 431 and the adapter sleeve 31 will decrease instantly. Under the damping action of the buffer spring 32, the moving guide rod 23 and the adapter sleeve 31 will decelerate until they are stationary. During this process, the impact energy of the part of the contact between the moving guide rod 23 and the adapter sleeve 31 will be dissipated by the deformation of the buffer spring 32. Therefore, the impact energy between the moving guide rod 23 and the adapter sleeve 31 is reduced, thereby preventing vibration during closing.

[0055] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A synchronizing interlocking device for a three-phase, three-mechanism permanent magnet circuit breaker, comprising: The fixed assembly includes a frame (11) with multiple partitions (12) fixed inside; a synchronous interlocking mechanism includes a rotating shaft (21) that rotates through the multiple partitions (12), with multiple crank arms (22) linearly fixed on the rotating shaft (21), the multiple crank arms (22) being hinged to the insulating parts of three moving guide rods (23) in the circuit breaker, and the three moving guide rods (23) being synchronously separated or in contact with the three stationary ends (25) of three permanent magnets (24); characterized in that: it further includes: The buffer mechanism is configured with three parts, including a transition sleeve (31) and a buffer spring (32). The transition sleeve (31) is slidably fitted onto the peripheral wall of the stationary end (25). The buffer spring (32) is connected between the stationary end (25) and the inner wall of the transition sleeve (31). The transition sleeve (31) is in intermittent contact with the moving guide rod (23). When the circuit is closed, the moving guide rod (23) is subjected to external force and comes into contact with the adapter sleeve (31) and moves synchronously at a reduced speed to prevent rigid contact between the moving guide rod (23) and the stationary end (25) and achieve shock absorption effect.

2. The synchronizing interlocking device for a three-phase, three-mechanism permanent magnet circuit breaker according to claim 1, characterized in that: The adapter sleeve (31) is configured as a column and is configured as silver.

3. The synchronizing interlocking device for a three-phase, three-mechanism permanent magnet circuit breaker according to claim 1, characterized in that: It also includes a damping mechanism, which is configured with three components, including a mounting plate (41), a slide rod (42), a pressure rod (43), and a damping spring (44). The mounting plate (41) is fixed between two adjacent partitions (12), and the permanent magnet (24) is fixed at the bottom of the mounting plate (41). The mounting plate (41) has a clearance hole in the center, and the adapter sleeve (31) is slidably disposed in the clearance hole. A connecting hole is provided on the side wall of the clearance hole. The slide rod (42) slides through the connecting hole, and the pressure rod (43) slides through the slide rod (42). One end of the pressure rod (43) contacts the peripheral wall of the adapter sleeve (31), and the damping spring (44) is connected between the pressure rod (43) and the inner wall of the slide rod (42). When the circuit breaker is tripped, the sliding rod (42) is driven by external force to increase the positive pressure between the pressure rod (43) and the transition sleeve (31), that is, the friction between the two increases, so as to prevent the transition sleeve (31) from excessively rebounding, thereby avoiding rebounding and closing.

4. A synchronizing interlocking device for a three-phase, three-mechanism permanent magnet circuit breaker according to claim 3, characterized in that: The force of the damping spring (44) is less than that of the buffer spring (32).

5. A synchronizing interlocking device for a three-phase, three-mechanism permanent magnet circuit breaker according to claim 3, characterized in that: One end of the pressure bar (43) is configured as a rubber head (431).

6. A synchronizing interlocking device for a three-phase, three-mechanism permanent magnet circuit breaker according to claim 3, characterized in that: It also includes a drive mechanism, which includes a motor (51) fixed on one of the partitions (12). The output end of the motor (51) is fixed with a linkage rod (52). A second crank arm (53) is fixed on the peripheral wall of the rotating shaft (21). A guide groove (121) is provided on multiple partitions (12). A guide rod (54) is slidably provided in multiple guide grooves (121). Multiple sliding rods (42) are fixed on the guide rod (54). A connecting ear (55) is fixed on the guide rod (54). A connecting rod (56) is hinged between one end of the linkage rod (52) and the second crank arm (53). A connecting rod (57) is hinged between the other end of the linkage rod (52) and the connecting ear (55).

7. A synchronizing interlocking device for a three-phase, three-mechanism permanent magnet circuit breaker according to claim 1, characterized in that: It also includes three support components, including a support plate (61) and a hydraulic cylinder (62). The support plate (61) is fixed between two adjacent partitions (12), and the hydraulic cylinder (62) is fixed on the support plate (61). The output shaft of the hydraulic cylinder (62) is assembled and fixed to the bottom of the permanent magnet (24).

8. A synchronizing interlocking device for a three-phase, three-mechanism permanent magnet circuit breaker according to claim 1, characterized in that: It also includes a connecting frame (71) and multiple casters (72). The connecting frame (71) is symmetrically installed on both sides of the frame (11), and the multiple casters (72) are symmetrically installed on the two connecting frames (71).

9. A synchronizing interlocking device for a three-phase, three-mechanism permanent magnet circuit breaker according to claim 1, characterized in that: The top of the moving guide rod (23) is connected to a conductive circuit (231), and the bottom of the permanent magnet (24) is connected to a terminal block (241).

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