Circuit breaker switch

Abstract

The invention belongs to the technical field of high-voltage electrical appliances, and particularly relates to a circuit breaker switch which comprises an insulating frame, supporting plates are fixedly installed on the two sides of the bottom of the insulating frame, a driving main shaft is rotationally installed between the two side walls of the top of the insulating frame, and a shunting main shaft is rotationally installed between the bottoms of the insulating frame; the isolation knife is fixedly mounted on the driving main shaft, and a circuit breaker static contact seat, a closing static contact seat and a grounding contact are sequentially arranged in the rotation radius of the isolation knife; and the two ends of the insulating sleeve are vertically and slidably connected with an upper conducting rod and a lower conducting rod, the upper conducting rod is fixedly connected with the circuit breaker static contact seat, the top end of the lower conducting rod is rotatably connected with a cam crank arm, and the cam crank arm is fixedly installed on the shunting main shaft. The overall size of the circuit breaker switch can be reduced by adjusting the structure of the disconnecting switch, and meanwhile, the control precision of opening and closing is improved by utilizing the planetary speed reduction mechanism, so that more control requirements are met.

Description

Technical Field

[0001] The invention belongs to the technical field of high-voltage electrical appliances, and in particular relates to a circuit breaker switch. Background Art

[0002] As a core protection device in power systems, circuit breakers' reliability directly impacts grid security. They are primarily used for short-circuit protection, overload protection, and undervoltage protection, and are widely used in homes and commercial buildings, industrial sectors, and power systems. While current mainstream technologies have achieved basic switching functions, they still have significant shortcomings in dynamic response and structural optimization.

[0003] Among them, the isolating switch of the existing circuit breaker switch is too long, which makes the overall size of the switch too large, hindering the miniaturization development of the circuit breaker switch; secondly, on the road to miniaturization of the circuit breaker switch, the driving source is generally directly connected to the isolating switch, and the dynamic response process of the isolating switch drive cannot be accurately controlled, making the control of opening and closing difficult to apply in an environment with high precision requirements. Summary of the Invention

[0004] The purpose of the present invention is to provide a circuit breaker switch that can reduce the overall size of the circuit breaker switch by adjusting the structure of the isolating switch, and at the same time use a planetary reduction mechanism to improve the control accuracy of opening and closing to meet more control requirements.

[0005] The technical solutions adopted by the present invention are as follows: A circuit breaker switch, comprising: An insulating frame, with support plates fixedly mounted on both sides of its bottom, a driving spindle rotatably mounted between the two side walls of the top of the insulating frame, and a diversion spindle rotatably mounted between the bottom; An isolating knife is fixedly mounted on the driving main shaft, and a circuit breaker static contact seat, a closing static contact seat and a grounding contact are sequentially arranged within the rotation radius of the isolating knife; An insulating sleeve, with an upper conductive rod and a lower conductive rod vertically slidably connected at both ends thereof, the upper conductive rod being fixedly connected to the static contact seat of the circuit breaker, the top end of the lower conductive rod being rotatably connected to a cam arm, and the cam arm being fixedly mounted on the shunt main shaft to drive the lower conductive rod and the upper conductive rod to switch between the open and closed states through the shunt main shaft via the cam arm.

[0006] As a preferred solution, the isolating knife is crescent-shaped, and both ends are provided with electrical connection contacts for connecting to any two of the circuit breaker static contact seat, the closing static contact seat and the grounding contact.

[0007] As a preferred solution, the top of the insulating frame is used to install the contact support beam of the closing static contact seat, and the contact support for installing the grounding contact is fixedly installed between the two side walls of the insulating frame. The circuit breaker static contact seat is fixedly installed between the two groups of support plates through an arc-shaped support, and the straight-line distances between the centers of the power contact points of the circuit breaker static contact seat, the closing static contact seat and the grounding contact and the drive main shaft are the same.

[0008] As a preferred solution, the support plate is fixedly installed with a support arm on the side close to the lower conductive rod, and the lower conductive rod slides through the support arm. A contact spring is fixedly installed between the bottom of the support arm and the lower conductive rod and is ringed on the outer surface of the bottom end of the lower conductive rod to provide pre-pressure on the lower conductive rod so that the upper conductive rod and the lower conductive rod remain separated in a static state.

[0009] As a preferred solution, it further includes a permanent magnet synchronous motor for driving the drive spindle to rotate, which is fixedly mounted on the outer wall of the insulating frame through a support frame, and a planetary reduction mechanism for increasing torque is provided between the permanent magnet synchronous motor and the drive spindle; As a preferred solution, the planetary reduction mechanism includes a driving gear fixedly mounted on the power output end of the permanent magnet synchronous motor, a driving shaft rotatably mounted on the support frame, a fixed gear plate rotatably mounted on the driving shaft, and a movable gear plate rotatably connected to the fixed gear plate. A driven gear meshing with the driving gear is fixedly mounted on one side of the driving shaft close to the driving gear, and a planetary gear set for increasing the power transmission torque is provided between the fixed gear plate and the movable gear plate.

[0010] As a preferred solution, the planetary gear set includes a planetary carrier and a sun gear fixedly mounted on the drive shaft, and a first planetary gear and a second planetary gear coaxially fixedly mounted on the edge of the planetary carrier, the sun gear is meshed with the first planetary gear, the inner surface of the fixed gear plate is integrally formed with a first inner ring gear meshed with the first planetary gear, and the inner surface of the movable gear plate is integrally formed with a second inner ring gear meshed with the second planetary gear.

[0011] As a preferred solution, the first planetary gears and the second planetary gears are arranged in a circumferential array on the edge of the planetary carrier, and at least two groups are provided. The driving spindle is directly connected to the movable gear disc.

[0012] As a preferred solution, a ratchet assembly is also provided between the power output end of the permanent magnet synchronous motor and the drive main shaft, which includes a support frame rotatably mounted on the side wall of the insulating frame, a ratchet fixedly mounted on the drive main shaft, and an external pawl engaged with the ratchet. The support frame is coaxially connected to the drive main shaft, and the ratchet is rotatably mounted in the support frame.

[0013] As a preferred solution, a limiting wheel is fixedly installed on the insulating frame near the side of the outer pawl to prevent it from rotating, an inner pawl that engages with the ratchet is rotatably installed in the support frame, and a limiting spring rod is installed in the support frame perpendicular to the outer surface of the inner pawl to limit it.

[0014] As a preferred solution, a pull rod is rotatably installed on the side of the insulating frame and adapted to the support frame, and a linkage rod is provided between the bottom end of the pull rod and the support frame, one end of the linkage rod is rotatably connected to the bottom end of the support frame, and the other end is rotatably connected to the bottom end of the pull rod, and a torsion spring is provided on the pull rod shaft to reset it after use, and a reset spring for resetting the support frame is fixedly connected between the top of the support frame and the insulating frame.

[0015] The technical effects achieved by the present invention are: The present invention provides an isolating knife, utilizes its crescent-shaped structural characteristics, and arranges the circuit breaker static contact seat, closing static contact seat and grounding contact within its rotation radius, so that they can be connected to each other through rotation, thereby effectively reducing the problem of excessive switch size caused by the excessive length of traditional isolating switches, and effectively ensuring the opening and closing angles of the switch and the direct insulation distance of the charged body.

[0016] The present invention can isolate the segmented fault current and the rated current by arranging an upper conductive rod, a lower conductive rod, a contact spring and a cam arm. At the same time, the structural characteristics of the cam arm further reduce the volume of the device, which is conducive to application in various scenarios. The contact spring can provide pre-pressure for the lower conductive rod to prevent accidental contact between the upper conductive rod and the lower conductive rod, thereby improving safety performance.

[0017] By arranging a planetary reduction mechanism at the power output end of the permanent magnet synchronous motor, the present invention can achieve transmission ratio multiplication through multi-stage gear meshing, amplify the small torque output by the permanent magnet synchronous motor to the high torque required for the operation of the device, and improve the control accuracy of the drive spindle. At the same time, the coaxial layout of the planetary gears significantly reduces the axial dimension, further reducing the size and ensuring that the device can be adapted in a narrow installation space.

[0018] The present invention arranges a ratchet assembly between the power output end of the permanent magnet synchronous motor and the drive main shaft, and utilizes the engagement between the ratchet and the outer pawl to convert the continuous rotation or reciprocating swing of the power output end of the permanent magnet synchronous motor into unidirectional intermittent motion of the output shaft. During the operation of the device, this characteristic is utilized to ensure that the action direction is unique when the switch is opened or closed, thereby avoiding misoperation; when the device completes opening or closing, the ratchet will immediately snap into the tooth groove of the outer pawl to prevent accidental reversal of the switch state due to mechanical vibration or external force, and realize automatic locking after the action is completed, without the need for additional manual intervention, thereby improving safety in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a front structural schematic diagram of an embodiment of the present invention; Figure 2 is a schematic diagram of a top view of the structure of an embodiment of the present invention; Figure 3 It is a schematic diagram of a partial structure of an embodiment of the present invention; Figure 4 is an exploded view of a permanent magnet synchronous motor and related components according to an embodiment of the present invention; Figure 5 is another exploded view of the permanent magnet synchronous motor and related components according to an embodiment of the present invention; Figure 6 is a schematic structural diagram of a ratchet assembly in an embodiment of the present invention; Figure 7 is a schematic side view of the ratchet assembly in an embodiment of the present invention; Figure 8 is a schematic diagram of the internal structure of the ratchet assembly in an embodiment of the present invention; Figure 9 Schematic diagram of the disconnecting switch in the embodiment of the present invention; Figure 10 Schematic diagram of the grounding state of the isolation switch in an embodiment of the present invention; Figure 11 Schematic diagram of the disconnector in the closed state in an embodiment of the present invention.

[0020] In the accompanying drawings, the components represented by each symbol are listed as follows: 1. Insulation frame; 11. Support plate; 12. Contact support; 13. Contact support beam; 14. Drive spindle; 15. Diverter spindle; 2. Isolation knife; 21. Circuit breaker static contact seat; 22. Closing static contact seat; 23. Grounding contact; 3. Insulating sleeve; 31. Upper conductive rod; 32. Lower conductive rod; 33. Contact spring; 34. Cam arm; 35. Support arm; 4. Permanent magnet synchronous motor; 41. Support frame; 42. Drive gear; 43. Driven gear; 44. Fixed gear plate; 441. First inner ring gear; 45. Planet carrier; 46. Movable gear plate; 461. Second inner ring gear; 47. First planetary gear; 48. Second planetary gear; 49. Drive shaft; 410. Sun gear; 5. Ratchet assembly; 51. Support frame; 52. Ratchet; 53. Inner pawl; 54. Outer pawl; 55. Linkage rod; 56. Pull rod; 57. Limit spring rod; 58. Return spring; 59. Limit wheel. DETAILED DESCRIPTION

[0021] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to the following examples. It should be understood that the following text is only used to describe one or more specific embodiments of the present invention and does not strictly limit the scope of protection of the present invention.

[0022] like Figures 1-11 As shown, a circuit breaker switch includes an insulating frame 1 and an isolating knife 2 arranged inside the insulating frame 1; a driving shaft 14 is rotatably installed between the two side walls of the top of the insulating frame 1, and the isolating knife 2 array is fixedly installed on the driving shaft 14. At the same time, the isolating knife 2 is crescent-shaped, and electrical connection contacts are provided at both ends. Then, the isolating knife 2 is rotated and adjusted by the driving shaft 14 to realize the opening, closing and grounding states using its two electrical connection contacts.

[0023] In this embodiment, three groups of isolating blades 2 are arranged in an equidistant array within the insulating frame 1, and three groups of associated components are matched therewith, thereby combining the circuit breaker switch in this embodiment. Of course, in other embodiments, the corresponding number of groups can be set according to specific needs, including but not limited to three groups.

[0024] Please refer to the attached Figure 3 In order to adapt to each isolation knife 2 and install corresponding components, support plates 11 are fixedly installed on both sides of the bottom of the insulating frame 1, and a contact support beam 13 is installed on the top, and a contact support 12 is fixedly installed between the two side walls; at the same time, a circuit breaker static contact seat 21 is fixedly installed between the two groups of support plates 11 through an arc support, a closing static contact seat 22 is installed on the contact support beam 13, and a grounding contact 23 is installed on the contact support 12, and the power contact center of the circuit breaker static contact seat 21, the closing static contact seat 22 and the grounding contact 23 is set to be the same as the straight-line distance between the driving main shaft 14, so that the driving main shaft 14 can use its two electrical connection contacts to connect to any two of the circuit breaker static contact seat 21, the closing static contact seat 22 and the grounding contact 23, or not connect to any three of them, to realize the switching of the opening, closing and grounding states (such as Figure 9、 10 , 11), utilizing such structural characteristics and layout can effectively reduce the problem of excessive switch size caused by the excessive length of traditional disconnectors, and effectively ensure the opening and closing angles of the switch and the direct insulation distance of the charged body.

[0025] Refer to the attached Figure 3 and Figure 9 To achieve current diversion in the device, an insulating sleeve 3 is vertically fixedly installed directly below the circuit breaker static contact seat 21 and between the two sets of support plates 11. The upper conductive rod 31 and the lower conductive rod 32 are vertically slidably connected at both ends of the insulating sleeve. By fixedly connecting the upper conductive rod 31 to the circuit breaker static contact seat 21 and utilizing the upper conductive rod 31 and the lower conductive rod 32 to separate and contact within the insulating sleeve 3, the circuit breaker static contact seat 21 can be diverted and interrupted, thereby isolating the segmented fault current from the rated current.

[0026] Furthermore, in order to accurately control the diversion, a diversion main shaft 15 is installed between the bottom of the insulating frame 1 through rotation, and a cam arm 34 is rotatably connected to the top of the lower conductive rod 32, and the cam arm 34 is fixedly installed on the diversion main shaft 15, so that the diversion main shaft 15 is rotated and the cam arm 34 drives the lower conductive rod 32 and the upper conductive rod 31 to switch between the open and closed states, making it more convenient to control and reducing the driving stroke at the same time, which can reduce the overall volume of the device.

[0027] Furthermore, in order to improve the safety of diversion, the support plate 11 is fixedly installed with a support arm 35 on the side close to the lower conductive rod 32, and the lower conductive rod 32 is slid through the support arm 35, and a contact spring 33 is fixedly installed between the bottom of the support arm 35 and the lower conductive rod 32, which is ringed on the outer surface of the bottom end of the lower conductive rod 32. The downward spring force of the contact spring 33 is used to provide pre-pressure on the lower conductive rod 32, so that the upper conductive rod 31 and the lower conductive rod 32 remain separated in a static state to avoid accidental contact. Only when the rotation of the diversion main shaft 15 drives the lower conductive rod 32 through the cam arm 34, an upward pushing force is given to the lower conductive rod 32 to make its compression spring contact with the upper conductive rod 31 for diversion, and after the pushing force disappears, it is reset and separated under the action of the rebound force of the contact spring 33, thereby improving safety.

[0028] Refer to the attached Figure 2 as well as Figure 4-Figure 6 In order to accurately control the isolation knife 2, a permanent magnet synchronous motor 4 is also provided in this embodiment. It is fixedly installed on the outer wall of the insulating frame 1 through a support frame 41, and is connected to the driving spindle 14 by transmission. Then, the state change of the isolation knife 2 is realized by driving the driving spindle 14 to rotate.

[0029] Furthermore, a driving gear 42 is fixedly installed at the power output end of the permanent magnet synchronous motor 4, and a driving shaft 49 is rotatably installed on the support frame 41, and a fixed gear plate 44 is rotatably installed on the driving shaft 49. Relative to it, a movable gear plate 46 is also rotatably connected to the fixed gear plate 44, and a driven gear 43 meshing with it is fixedly installed on the side of the driving shaft 49 close to the driving gear 42, and a planet carrier 45 and a sun gear 410 are fixedly installed on the driving shaft 49, and a first planet gear 47 and a second planet gear 48 are coaxially fixedly installed on the edge of the planet carrier 45. By meshing the sun gear 410 with the first planet gear 47 and the first planet gear 4 7 is meshed with the first inner ring gear 441 on the inner surface of the fixed toothed disc 44, and at the same time, the second planetary gear 48 is meshed with the second inner ring gear 461 on the inner surface of the movable toothed disc 46, and then the sun gear 410, the first planetary gear 47, the second planetary gear 48, the first inner ring gear 441 and the second inner ring gear 461 are meshed, so as to multiply the transmission ratio, amplify the small torque at the output end of the permanent magnet synchronous motor 4 to the movable toothed disc 46 for output, and then convert it into the high torque required for the operation of the device, thereby improving the control accuracy of the drive spindle 14. At the same time, the coaxial layout of the planetary gears significantly reduces the axial dimension, further reducing the size, and ensuring that the device can be adapted in a narrow installation space.

[0030] Refer to the attached Figure 4 and Figure 5 It should be noted that the first planetary gears 47 and the second planetary gears 48 are arranged in a circular array on the edge of the planetary carrier 45, and at least two groups are provided. In this embodiment, three groups are provided. Of course, in other embodiments, different numbers of first planetary gears 47 and second planetary gears 48 and gear ratios can be provided according to the torque requirements to meet specific needs.

[0031] Refer to the attached Figure 1 as well as Figure 6-Figure 7In order to improve the safety of the device, in this embodiment, a ratchet assembly 5 is further provided between the power output end of the permanent magnet synchronous motor 4 and the driving spindle 14, which includes a support frame 51 rotatably mounted on the side wall of the insulating frame 1, a ratchet 52 fixedly mounted on the driving spindle 14, and an outer pawl 54 engaged with the ratchet 52. By coaxially rotating the support frame 51 and the driving spindle 14, and rotating the ratchet 52 in the support frame 51 and directly connected to the movable toothed disc 46, the driving spindle 14 is driven to change the insulation. When the isolating knife 2 is in a rotating state, the engagement between the ratchet 52 and the outer pawl 54 can be used to convert the continuous rotation or reciprocating swing of the power output end of the permanent magnet synchronous motor 4 into a unidirectional intermittent motion of the drive main shaft 14, so that the isolating knife 2 can only rotate in one direction. During the operation of the device, this characteristic is used to ensure that the action direction is unique when the switch is opened or closed, avoiding misoperation and thus improving the safety of the equipment; at the same time, the cooperation between the teeth of the ratchet 52 and the pawl can realize a fixed angle of rotation for each action (such as 90° for opening or 60° for closing), ensuring the accuracy of the contact opening distance.

[0032] Furthermore, a limit wheel 59 is fixedly mounted on the insulating frame 1 near the side of the outer pawl 54. This limiter can limit the rotation angle of the outer pawl 54 during its rotation, ensuring that it does not disengage from the meshing state with the ratchet 52 without hindering the rotation of the ratchet 52, thereby ensuring the stability of the unidirectional rotation. Secondly, an inner pawl 53 is rotatably mounted within the support frame 51 and meshes with the ratchet 52, providing another layer of security. At the same time, a limiter spring rod 57 is mounted perpendicular to the outer surface of the inner pawl 53 within the support frame 51 to limit the inner pawl 53. This also ensures that the inner pawl 53 does not disengage from the meshing state with the ratchet 52 without hindering the rotation of the ratchet 52.

[0033] Furthermore, in order to be able to manually control the rotation state of the isolation knife 2 in an emergency, a pull rod 56 is rotatably installed on the side of the insulating frame 1 and the support frame 51, and a linkage rod 55 is provided between the bottom end of the pull rod 56 and the support frame 51. By rotating one end of the linkage rod 55 and connecting it to the bottom end of the support frame 51 and the other end and connecting it to the bottom end of the pull rod 56, and providing a torsion spring on the pull rod 56 shaft to reset it after use, the top of the support frame 51 and the insulating frame 1 are fixedly connected. The reset spring 58 is used to reset the body 51. The staff can pull the holding rod 56 downward, and then pull the supporting frame 51 as a whole to rotate through the linkage rod 55, and use the inner pawl 53 to engage with the ratchet 52, so as to drive the driving spindle 14 to rotate through the ratchet 52, thereby changing the rotation state of the isolating knife 2, adding manual control of the opening, closing and grounding states, so that when the permanent magnet synchronous motor 4 fails or the power is cut off, the device can be manually controlled, thereby improving double insurance and ensuring safety in use.

[0034] The foregoing is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained herein shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.

Claims

1. A circuit breaker switch, characterized in that: include: An insulating frame (1) has support plates (11) fixedly mounted on both sides of its bottom, a driving spindle (14) is rotatably mounted between the two side walls of the top of the insulating frame (1), and a diversion spindle (15) is rotatably mounted between the bottoms; An isolating knife (2) is fixedly mounted on the driving main shaft (14), wherein a circuit breaker static contact seat (21), a closing static contact seat (22), and a grounding contact (23) are sequentially arranged within the rotation radius of the isolating knife (2); An insulating sleeve (3) has an upper conductive rod (31) and a lower conductive rod (32) vertically slidably connected at both ends thereof, the upper conductive rod (31) being fixedly connected to the circuit breaker static contact seat (21), and the top end of the lower conductive rod (32) being rotatably connected to a cam arm (34), the cam arm (34) being fixedly mounted on the shunt main shaft (15) so as to drive the lower conductive rod (32) and the upper conductive rod (31) to switch between an open and closed state via the shunt main shaft (15) through the cam arm (34).

2. A circuit breaker switch according to claim 1, characterized in that: The isolating knife (2) is crescent-shaped, and both ends are provided with electrical connection contacts for connecting to any two of the circuit breaker static contact seat (21), the closing static contact seat (22), and the grounding contact (23).

3. The circuit breaker switch according to claim 1, characterized in that: The top of the insulating frame (1) is used to install the contact support beam (13) of the closing static contact seat (22); the contact support (12) for installing the grounding contact (23) is fixedly installed between the two side walls of the insulating frame (1); the circuit breaker static contact seat (21) is fixedly installed between the two groups of support plates (11) through an arc support; the straight-line distances between the power contact centers of the circuit breaker static contact seat (21), the closing static contact seat (22) and the grounding contact (23) and the driving main shaft (14) are the same.

4. The circuit breaker switch according to claim 1, characterized in that: A support arm (35) is fixedly mounted on the support plate (11) on one side close to the lower conductive rod (32), and the lower conductive rod (32) slides through the support arm (35). A contact spring (33) is fixedly mounted between the bottom of the support arm (35) and the lower conductive rod (32), and is sleeved on the outer surface of the bottom end of the lower conductive rod (32), so as to provide pre-pressure on the lower conductive rod (32) so that the upper conductive rod (31) and the lower conductive rod (32) remain separated in a static state.

5. The circuit breaker switch according to claim 1, characterized in that: It also includes a permanent magnet synchronous motor (4) for driving the driving main shaft (14) to rotate, which is fixedly mounted on the outer wall of the insulating frame (1) by providing a support frame (41), and a planetary reduction mechanism for increasing torque is provided between the permanent magnet synchronous motor (4) and the driving main shaft (14); The planetary reduction mechanism comprises a driving gear (42) fixedly mounted on the power output end of the permanent magnet synchronous motor (4), a driving shaft (49) rotatably mounted on the supporting frame (41), a fixed toothed disc (44) rotatably mounted on the driving shaft (49), and a movable toothed disc (46) rotatably connected to the fixed toothed disc (44), a driven gear (43) meshing with the driving gear (42) is fixedly mounted on one side of the driving shaft (49) close to the driving gear (42), and a planetary gear set for increasing the power transmission torque is provided between the fixed toothed disc (44) and the movable toothed disc (46).

6. The circuit breaker switch according to claim 5, characterized in that: The planetary gear set comprises a planetary carrier (45) and a sun gear (410) fixedly mounted on the drive shaft (49), and a first planetary gear (47) and a second planetary gear (48) coaxially fixedly mounted on the edge of the planetary carrier (45); the sun gear (410) is meshed with the first planetary gear (47); a first inner gear ring (441) meshed with the first planetary gear (47) is integrally formed on the inner surface of the fixed gear plate (44); and a second inner gear ring (461) meshed with the second planetary gear (48) is integrally formed on the inner surface of the movable gear plate (46).

7. The circuit breaker switch according to claim 6, characterized in that: The first planetary gear (47) and the second planetary gear (48) are arranged in a circumferential array on the edge of the planetary carrier (45), and at least two groups are provided. The driving main shaft (14) is directly connected to the movable gear disc (46).

8. The circuit breaker switch according to claim 5, characterized in that: A ratchet assembly (5) is further provided between the power output end of the permanent magnet synchronous motor (4) and the driving main shaft (14), comprising a support frame (51) rotatably mounted on the side wall of the insulating frame (1), a ratchet (52) fixedly mounted on the driving main shaft (14), and an external pawl (54) meshing with the ratchet (52); the support frame (51) is coaxially rotatably connected to the driving main shaft (14), and the ratchet (52) is rotatably mounted in the support frame (51).

9. The circuit breaker switch according to claim 8, characterized in that: A limiting wheel (59) is fixedly mounted on the insulating frame (1) on one side close to the outer pawl (54) to prevent the outer pawl (54) from rotating. An inner pawl (53) meshing with the ratchet (52) is rotatably mounted in the support frame (51). A limiting spring rod (57) is mounted perpendicular to the outer surface of the inner pawl (53) in the support frame (51) to limit the inner pawl (53).

10. The circuit breaker switch according to claim 8, characterized in that: A pull rod (56) is rotatably mounted on the side of the insulating frame (1) and adapted to rotate with the support frame (51), and a linkage rod (55) is provided between the bottom end of the pull rod (56) and the support frame (51), one end of the linkage rod (55) is rotatably connected to the bottom end of the support frame (51), and the other end is rotatably connected to the bottom end of the pull rod (56), and a torsion spring for resetting the pull rod (56) after use is provided on the rotating shaft of the pull rod (56), and a reset spring (58) for resetting the support frame (51) is fixedly connected between the top of the support frame (51) and the insulating frame (1).

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