Circuit breaker

Abstract

The utility model relates to the technical field of low-voltage electric appliances, and particularly discloses a circuit breaker which comprises a shell, a motor and a planetary gear speed reduction assembly, and the motor and the planetary gear speed reduction assembly are arranged in the shell. The housing is provided with an operating member, and the operating member is connected with a moving contact assembly arranged in the housing. The operating piece is provided with a matching connecting part which is in transmission connection with the planetary gear speed reduction assembly, and the motor drives the planetary gear speed reduction assembly to drive the operating piece to linearly move on the shell in the direction away from or close to the moving contact assembly, so that the operating piece drives the moving contact assembly to realize closing or opening. According to the circuit breaker, the space occupied by the transmission part in the shell can be effectively reduced, convenience is provided for arrangement of other structures, and the overall size of the circuit breaker can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a circuit breaker. Background Art

[0002] In the circuit breaker of the prior art, a gear set formed by a motor and a plurality of gears is usually used to control the moving contact assembly, so that the moving contact assembly can realize automatic opening and closing. The gear set used in the motor drive module provided by the prior art not only has many parts, but also occupies a large space of the circuit breaker housing, which not only leads to a small space layout of other components, but also is not conducive to reducing the volume of the circuit breaker housing. Utility Model Content

[0003] The purpose of the present application is to provide a circuit breaker, which improves the gear transmission part of the circuit breaker and can effectively reduce the space occupied by the transmission part in the housing, which not only facilitates other structural arrangements, but also helps to reduce the overall volume of the circuit breaker.

[0004] The embodiment of the present application is implemented as follows:

[0005] An embodiment of the present application provides a circuit breaker, comprising a housing, and a motor and a planetary gear reduction assembly arranged in the housing; an operating piece is installed on the housing, and the operating piece is connected to a moving contact assembly arranged in the housing; a mating connection portion is provided on the operating piece, which is transmission-connected to the planetary gear reduction assembly, and the motor can drive the operating piece to move linearly on the housing in a direction away from or close to the moving contact assembly by driving the planetary gear reduction assembly, so that the operating piece drives the moving contact assembly to achieve closing or opening.

[0006] As an optional embodiment, the power output end of the planetary gear reduction assembly is provided with a sector gear, and the mating connection part is a rack provided on the operating member; the rack is meshed with the sector gear, and the motor can drive the operating member to move linearly; the rack is separated from the sector gear, and the linear movement stops.

[0007] As an optional implementation, the moving contact assembly is rotatably mounted in the housing, and the axis of the power output end of the planetary gear reduction assembly is perpendicular to the rotation axis of the moving contact assembly.

[0008] As an optional embodiment, the planetary gear reduction assembly includes a coaxially arranged fixed ring gear and a rotating ring gear, and planetary gears arranged in the fixed ring gear and the rotating ring gear; the planetary gear includes a first gear and a second gear, the first gear is meshed with the fixed ring gear for transmission, and the second gear is meshed with the rotating ring gear for transmission; the motor drives the planetary gear to rotate through an eccentric shaft, and causes the rotating ring gear to drive the sector gear to rotate.

[0009] As an optional embodiment, the first gear and the second gear are coaxial and stacked; the eccentric shaft is passed through the first gear and the second gear, and has a preset distance from the power output shaft of the motor; and also includes a coaxial shaft coaxially arranged with the power output shaft, and the coaxial shaft is passed through the rotating ring gear.

[0010] As an optional implementation, the planetary gear reduction assembly includes at least one planetary gear and at least one spur gear set; the motor can drive the eccentric shaft to rotate via the spur gear set.

[0011] As an optional embodiment, the operating member is linked to the moving contact assembly via a connecting rod, a locking rod is provided on the shell, and the middle part of the locking rod is hinged to the shell; when the moving contact assembly is closed, the moving contact assembly can store elastic potential energy through the spring element, and the end of the locking rod close to the moving contact assembly abuts against the connecting rod, and generates a force against the spring element; when the operating member is driven to move linearly away from the moving contact assembly, it can drive the locking rod to rotate, the abutting end of the locking rod is separated from the connecting rod, and the spring element releases the elastic potential energy to push the moving contact assembly to open.

[0012] As an optional embodiment, a protruding structure is provided on the operating member, and the end of the locking rod close to the operating member has a guiding slope; the operating member can drive the protruding structure to move linearly away from the moving contact assembly, and the protruding structure abuts against the guiding slope, and pushes the locking rod to rotate through the guiding slope, so that the abutting end of the locking rod is separated from the connecting rod.

[0013] As an optional embodiment, a reset spring is provided in the housing, and the operating member moves close to the moving contact assembly when the switch is closed, compressing the reset spring; when the switch is opened, the reset spring can push the operating member to move away from the moving contact assembly.

[0014] As an optional embodiment, the moving contact assembly includes a moving contact and a free tripping mechanism; a sliding groove is provided on the free tripping mechanism, and the operating member is connected to the sliding groove of the free tripping structure through a connecting rod; in the open state, the free tripping mechanism locks the connecting rod at one end of the sliding groove; it also includes an electromagnetic release, which can drive the free tripping mechanism to move, so that the connecting rod is unlocked and slides to the other end of the sliding groove, and the abutting end of the locking rod is separated from the connecting rod; the moving contact can achieve opening by the elastic thrust generated by the arranged contact spring.

[0015] As an optional embodiment, it also includes an overload detection component and a control main board arranged in the shell; the motor and the overload detection component are electrically connected to the control main board respectively; in the closed state, the overload detection component detects the current, and when the current or temperature exceeds the threshold set by the overload detection component and lasts for a predetermined time, the control main board can drive the motor to rotate, so that the moving contact assembly is opened.

[0016] As an optional implementation, the housing is a rectangular structure, and the operating member, the connecting rod and the moving contact assembly are arranged in sequence along the length direction of the rectangular structure.

[0017] The beneficial effects of the embodiments of the present application include:

[0018] The embodiment of the present application provides a circuit breaker, including a housing, a motor and a planetary gear reduction assembly arranged in the housing; an operating member is installed on the housing, and the operating member is connected to a moving contact assembly arranged in the housing; the operating member of the embodiment of the present application is provided with a matching connection part that is transmission-connected to the planetary gear reduction assembly, and the motor can drive the operating member to move linearly on the housing in a direction away from or close to the moving contact assembly by driving the planetary gear reduction assembly, so that the operating member drives the moving contact assembly to close or open the switch. Compared with the prior art, the embodiment of the present application adopts a motor to drive the planetary gear reduction assembly to realize the drive control of the operating member. The planetary gear reduction assembly not only has a large reduction ratio, but also has fewer parts and occupies a small space in the housing, so that the volume of the driving part of the circuit breaker is greatly reduced. By reducing the volume of the driving part, the embodiment of the present application can not only provide convenience for other structural arrangements, but also help to reduce the overall volume of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is one of the structural schematic diagrams of the circuit breaker according to the embodiment of the present application;

[0021] Figure 2 This is the second structural schematic diagram of the circuit breaker according to the embodiment of the present application;

[0022] Figure 3 This is the third structural schematic diagram of the circuit breaker in the embodiment of the present application;

[0023] Figure 4 This is the fourth structural schematic diagram of the circuit breaker of the embodiment of the present application;

[0024] Figure 5 This is the fifth structural diagram of the circuit breaker of the embodiment of the present application;

[0025] Figure 6 This is the sixth structural diagram of the circuit breaker of the embodiment of the present application;

[0026] Figure 7 This is the seventh structural diagram of the circuit breaker of the embodiment of the present application;

[0027] Figure 8 This is the eighth structural schematic diagram of the circuit breaker of the embodiment of the present application;

[0028] Fig. 9 This is the ninth structural diagram of the circuit breaker according to the embodiment of the present application;

[0029] Fig.10 This is the tenth structural diagram of the circuit breaker according to the embodiment of the present application;

[0030] Fig.11 This is the eleventh structural diagram of the circuit breaker according to the embodiment of the present application.

[0031] icon:

[0032] 100-housing; 101-motor; 102-planetary gear reduction assembly; 103-operating member; 104-moving contact assembly; 105-sector gear; 106-rack; 107-fixed ring gear; 108-rotating ring gear; 109-planetary gear; 110-first gear; 111-second gear; 112-eccentric shaft; 113-concentric shaft; 114-spur gear set; 115-connecting rod; 116-locking rod; 117-protruding structure; 118-guide ramp; 119-free release mechanism; 120-slide groove; 121-electromagnetic release. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0035] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0036] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] In the circuit breaker of the prior art, a gear set formed by a motor 101 and a plurality of gears is generally used to control the moving contact assembly 104, so that the moving contact assembly 104 can realize automatic opening and closing. The gear set used in the motor 101 drive module provided by the prior art not only has many parts, but also occupies a large space of the circuit breaker housing 100, which not only leads to a small space layout of other components, but also is not conducive to reducing the volume of the circuit breaker housing 100.

[0038] In order to solve the above technical problems, an embodiment of the present application provides a circuit breaker.

[0039] Reference Figure 1 , Figure 2 As shown, an embodiment of the present application provides a circuit breaker, including a housing 100, and a motor 101 and a planetary gear reduction assembly 102 arranged in the housing 100; an operating member 103 is installed on the housing 100, and the operating member 103 is connected to a moving contact assembly 104 arranged in the housing 100; a matching connection portion is provided on the operating member 103, which is transmission-connected to the planetary gear reduction assembly 102, and the motor 101 can drive the operating member 103 to move linearly on the housing 100 in a direction away from or close to the moving contact assembly 104 by driving the planetary gear reduction assembly 102, so that the operating member 103 drives the moving contact assembly 104 to achieve closing or opening.

[0040] It should be noted that one end of the operating member 103 of the embodiment of the present application can extend to the outside of the shell 100 to facilitate operation by the staff, and the other end can be slidably inserted into the inside of the shell 100 to cooperate with the planetary gear reduction assembly 102 for connection.

[0041] The power generated by the motor 101 can be transmitted to the planetary gear reduction assembly 102, and after being decelerated by the planetary gear reduction assembly 102, the operating member 103 is driven to move linearly. It should be noted that the operating member 103 of the embodiment of the present application can move linearly in a direction away from or close to the moving contact assembly 104, that is, the operating member 103 moves in a translational manner under the drive of the planetary gear reduction assembly 102.

[0042] It should be noted that the operating member 103 is a rod structure, and the extension direction of the operating member 103 is consistent with the linear movement direction. Through the linear movement of the operating member 103, the operating member 103 can move in a smaller housing 100, that is, it does not occupy the space in the larger housing 100. Compared with the swinging structural member, the linear movement of the operating member 103 in its extension direction can make the operating member 103 and the moving path fit into a straight line, so there is no need for other structures in the circuit breaker housing 100 to be designed for avoidance, thereby improving the convenience of other structural layouts.

[0043] The housing 100 of the embodiment of the present application may be a rectangular structure, and the operating member 103, the connecting rod 115 and the moving contact assembly 104 are sequentially arranged along the length direction of the rectangular structure. The extending directions of the operating member 103 and the connecting rod 115 are consistent with the length direction of the rectangular structure.

[0044] It should be noted that the housing 100 may also be configured in other shapes, and those skilled in the art may select other shapes according to their needs, and there is no special limitation on this.

[0045] Compared with the prior art which uses a gear set formed by multiple gears to transmit the power of the motor 101, under the condition of achieving the same reduction ratio, the embodiment of the present application uses a planetary gear reduction assembly 102 for power transmission, which has the advantages of fewer parts and less space.

[0046] The embodiment of the present application provides a circuit breaker, including a housing 100, a motor 101 and a planetary gear reduction assembly 102 arranged in the housing 100; an operating member 103 is installed on the housing 100, and the operating member 103 is connected to a moving contact assembly 104 arranged in the housing 100; the operating member 103 of the embodiment of the present application is provided with a matching connection part that is transmission-connected with the planetary gear reduction assembly 102, and the motor 101 can drive the operating member 103 on the housing 100 to move linearly in a direction away from or close to the moving contact assembly 104 by driving the planetary gear reduction assembly 102, so that the operating member 103 drives the moving contact assembly 104 to close or open the switch. Compared with the prior art, the embodiment of the present application adopts the motor 101 to drive the planetary gear reduction assembly 102 to realize the driving control of the operating member 103, and the planetary gear reduction assembly 102 not only has a large reduction ratio, but also has fewer parts and occupies a small space in the housing 100, so that the volume of the driving part of the circuit breaker is greatly reduced. By reducing the volume of the driving part, the embodiment of the present application can not only provide convenience for other structural arrangements, but also help to reduce the overall volume of the circuit breaker.

[0047] Reference Figure 3 , Figure 4 as well as Figure 5 As shown, as an optional embodiment, the power output end of the planetary gear reduction assembly 102 is provided with a sector gear 105, and the mating connection part is a rack 106 provided on the operating member 103; the rack 106 is meshed with the sector gear 105, and the motor 101 can drive the operating member 103 to move linearly; the rack 106 is separated from the sector gear 105, and the linear movement stops.

[0048] Furthermore, the present application implements linear drive control of the operating member 103 by meshing the sector gear 105 with the rack 106 .

[0049] It should be noted that the sector gear 105 and the rack 106 have two states: meshing transmission and separation.

[0050] When the sector gear 105 and the rack 106 are meshed and transmitted, the sector gear 105 rotates clockwise to drive the operating member 103 close to the moving contact assembly 104, so as to close the circuit breaker. After the moving contact assembly 104 and the stationary contact assembly abut to close the circuit breaker, the sector gear 105 and the rack 106 are in a separated state. In this state, to open the circuit breaker, the staff can directly manually pull out the operating member 103 to realize manual opening.

[0051] When the sector gear 105 and the rack 106 are meshed and driven, the sector gear 105 rotates counterclockwise to drive the operating member 103 away from the moving contact assembly 104, thereby realizing the opening of the circuit breaker. After the moving contact assembly 104 and the static contact assembly are opened, the sector gear 105 and the rack 106 are in a separated state. In this state, to realize closing, the staff can directly push the operating member 103 to realize manual closing.

[0052] In the embodiment of the present application, the transmission setting of the sector gear 105 and the rack 106 enables reasonable compatibility between the manual opening and closing of the circuit breaker and the electric opening and closing of the circuit breaker.

[0053] As an optional implementation, the moving contact assembly 104 is rotatably installed in the housing 100 , and the axis of the power output end of the planetary gear reduction assembly 102 is perpendicular to the rotation axis of the moving contact assembly 104 .

[0054] In the embodiment of the present application, the extension direction of the power output end of the planetary gear reduction assembly 102 is perpendicular to the rotation axis of the moving contact assembly 104. Through this arrangement, the driving part formed by the motor 101 and the planetary gear reduction assembly 102 and the moving contact assembly 104 can be close to each other, which can save assembly space and greatly improve the compactness of the assembly, thereby reducing the volume of the entire device.

[0055] Reference Figure 6 , Figure 7 as well as Figure 8 As shown, as an optional embodiment, the planetary gear reduction assembly 102 includes a coaxially arranged fixed ring gear 107 and a rotating ring gear 108 , and planetary gears 109 arranged in the fixed ring gear 107 and the rotating ring gear 108 .

[0056] Reference Fig. 9 and Fig.10 As shown, the planetary gear 109 includes a first gear 110 and a second gear 111. The first gear 110 is meshed with the fixed ring gear 107 for transmission, and the second gear 111 is meshed with the rotating ring gear 108 for transmission. The motor 101 drives the planetary gear 109 to rotate through the eccentric shaft 112, and the rotating ring gear 108 drives the sector gear 105 to rotate.

[0057] It should be noted that the fixed ring gear 107 is fixedly mounted on the motor 101 , and the entire motor 101 module is fixedly connected to the housing 100 .

[0058] Among them, the first gear 110 is arranged in the fixed ring gear 107, and the diameter of the first gear 110 is smaller than the fixed ring gear 107. Therefore, when the first gear 110 is in the fixed ring gear 107 and meshes with the fixed ring gear 107, the motor 101 drives the eccentric shaft 112 to make the first gear 110 revolve around the power output shaft of the motor 101, and at the same time make the first gear 110 rotate around the eccentric shaft 112.

[0059] Similarly, the second gear 111 is disposed in the rotating ring gear 108, and the diameter of the second gear 111 is smaller than that of the rotating ring gear 108. The first gear 110 and the second gear 111 are coaxially disposed, and when the first gear 110 rotates, the second gear 111 can be driven to rotate, and the second gear 111 is meshed with the rotating ring gear 108, so the second gear 111 can drive the rotating ring gear 108 to rotate, thereby driving the sector gear 105 to rotate.

[0060] Furthermore, the first gear 110 and the second gear 111 are coaxial and stacked; the eccentric shaft 112 is passed through the first gear 110 and the second gear 111, and is preset at a distance from the power output shaft of the motor 101; and also includes a coaxial shaft 113 arranged coaxially with the power output shaft, and the coaxial shaft 113 is passed through the rotating ring gear 108.

[0061] Reference Fig.11 As shown, as an optional embodiment, the planetary gear reduction assembly 102 includes at least one planetary gear 109 and at least one spur gear set 114 ; the motor 101 can drive the eccentric shaft 112 to rotate through the spur gear set 114 .

[0062] It should be noted that the power output shaft of the motor 101 can also be directly connected to the eccentric shaft 112 through a structure such as an eccentric wheel to drive the eccentric shaft 112.

[0063] Reference Figure 1 and Figure 2 As shown, as an optional embodiment, the operating member 103 and the moving contact assembly 104 are linked by a connecting rod 115, and a locking rod 116 is provided on the housing 100, and the middle part of the locking rod 116 is hinged to the housing 100; when the moving contact assembly 104 is closed, the moving contact assembly 104 can store elastic potential energy through the spring element, and the end of the locking rod 116 close to the moving contact assembly 104 abuts against the connecting rod 115, and generates a force against the spring element; when the operating member 103 is driven to move linearly away from the moving contact assembly 104, it can drive the locking rod 116 to rotate, and the abutting end of the locking rod 116 is separated from the connecting rod 115, and the spring element releases the elastic potential energy to push the moving contact assembly 104 to open.

[0064] Specifically, a protruding structure 117 is provided on the operating member 103, and a guiding slope 118 is provided at the end of the locking rod 116 close to the operating member 103; the operating member 103 can drive the protruding structure 117 to move linearly away from the moving contact assembly 104, and the protruding structure 117 abuts against the guiding slope 118, and pushes the locking rod 116 to rotate through the guiding slope 118, so that the abutting end of the locking rod 116 is separated from the connecting rod 115.

[0065] As an optional embodiment, a reset spring is provided in the housing 100 , and the operating member 103 moves close to the moving contact assembly 104 when closing the switch, compressing the reset spring; when opening the switch, the reset spring can push the operating member 103 to move away from the moving contact assembly 104 .

[0066] Reference Figure 1 , Figure 2 As shown, as an optional embodiment, the moving contact assembly 104 includes a moving contact and a free tripping mechanism 119; a slide groove 120 is provided on the free tripping mechanism 119, and the operating member 103 is connected to the slide groove 120 of the free tripping structure through a connecting rod 115; in the open state, the free tripping mechanism 119 locks the connecting rod 115 at one end of the slide groove 120; it also includes an electromagnetic release 121, which can drive the free tripping mechanism 119 to move, so that the connecting rod 115 is unlocked and slides to the other end of the slide groove 120, and the abutting end of the locking rod 116 is separated from the connecting rod 115; the moving contact can achieve opening by the elastic thrust generated by the arranged contact spring.

[0067] Among them, the circuit breaker of the embodiment of the present application also includes an overload detection component and a control main board arranged in the shell 100; the motor 101 and the overload detection component are electrically connected to the control main board respectively; in the closed state, the overload detection component detects the current, and when the current or temperature exceeds the threshold set by the overload detection component and lasts for a predetermined time, the control main board can drive the motor 101 to rotate, so that the moving contact component 104 is opened.

[0068] Among them, the overload detection component can be a current detection component or a temperature detection component.

[0069] It should be noted that the magnitude of the current and the length of the predetermined time are inversely related, and the larger the current, the shorter the predetermined time. Similarly, the higher the temperature, the shorter the predetermined time. The specific data of the current threshold, the temperature threshold, and the predetermined time can be selected by those skilled in the art as needed, and are not particularly limited thereto.

[0070] It should be noted that when a short circuit fault occurs, the electromagnetic release 121 can drive the free tripping mechanism 119, so that the connecting rod 115 is unlocked and slides to the other end of the slide groove 120, and at the same time, the abutting end of the locking rod 116 is separated from the connecting rod 115, thereby realizing the rapid opening of the moving contact under the action of the elastic thrust.

[0071] When the current is overloaded, the current and temperature exceed the set threshold value, forming an overload current signal.

[0072] Among them, the overload current signal passes through the current detection component and the temperature detection component set in the housing 100. The current detection component can be used to detect the current size, and the temperature detection component is used to detect the current working environment temperature. The above detection component is used to detect the overload current signal. When the overload current signal lasts for a certain period of time, the motor 101 is controlled to rotate by the control mainboard, so that the operating member 103 moves away from the moving contact assembly 104, so that the operating member 103 can drive the protruding structure 117 to move linearly away from the moving contact assembly 104, and the protruding structure 117 abuts against the guide slope 118, and pushes the lock rod 116 to rotate through the guide slope 118, so that the abutting end of the lock rod 116 is separated from the connecting rod 115. After separation, the moving contact assembly 104 returns to the open position under the action of the spring thrust to protect the circuit.

[0073] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A circuit breaker, characterized in that: The invention comprises a housing (100), and a motor (101) and a planetary gear reduction assembly (102) arranged in the housing (100); an operating member (103) is installed on the housing (100), and the operating member (103) is connected to a moving contact assembly (104) arranged in the housing (100); a matching connection portion is provided on the operating member (103) which is transmission-connected to the planetary gear reduction assembly (102); the motor (101) can drive the operating member (103) to move linearly on the housing (100) in a direction away from or close to the moving contact assembly (104), by driving the planetary gear reduction assembly (102), so that the operating member (103) drives the moving contact assembly (104) to close or open the switch.

2. The circuit breaker according to claim 1, characterized in that: The power output end of the planetary gear reduction assembly (102) is provided with a sector gear (105), and the mating connection portion is a rack (106) provided on the operating member (103); the rack (106) is meshed with the sector gear (105), and the motor (101) can drive the operating member (103) to move linearly; the rack (106) is separated from the sector gear (105), and the linear movement stops.

3. The circuit breaker according to claim 1, characterized in that: The moving contact assembly (104) is rotatably mounted in the housing, and the axis of the power output end of the planetary gear reduction assembly (102) is perpendicular to the rotation axis of the moving contact assembly (104).

4. The circuit breaker according to claim 2, characterized in that: The planetary gear reduction assembly (102) comprises a coaxially arranged fixed ring gear (107) and a rotating ring gear (108), and a planetary gear (109) arranged inside the fixed ring gear (107) and the rotating ring gear (108); the planetary gear (109) comprises a first gear (110) and a second gear (111), the first gear (110) meshes with the fixed ring gear (107) for transmission, and the second gear (111) meshes with the rotating ring gear (108) for transmission; the motor (101) drives the planetary gear (109) to rotate via an eccentric shaft (112), and causes the rotating ring gear (108) to drive the sector gear (105) to rotate.

5. The circuit breaker according to claim 4, characterized in that: The first gear (110) and the second gear (111) are coaxial and stacked; the eccentric shaft (112) is passed through the first gear (110) and the second gear (111) and is spaced at a preset distance from the power output shaft of the motor (101); and also includes a coaxial shaft (113) coaxially arranged with the power output shaft, and the coaxial shaft (113) is passed through the rotating gear ring (108).

6. The circuit breaker according to claim 4, characterized in that: The planetary gear reduction assembly (102) comprises at least one planetary gear (109) and at least one spur gear set (114); the motor (101) can drive the eccentric shaft (112) to rotate via the spur gear set (114).

7. The circuit breaker according to any one of claims 1 to 6, characterized in that: The operating member (103) and the moving contact assembly (104) are linked via a connecting rod (115), and a locking rod (116) is provided on the housing (100), and the middle part of the locking rod (116) is hinged to the housing (100); when the moving contact assembly (104) is closed, the moving contact assembly (104) can store elastic potential energy via the spring element, and the end of the locking rod (116) close to the moving contact assembly (104) abuts against the connecting rod (115) and generates a force that resists the action of the spring element; when the operating member (103) is driven to move linearly away from the moving contact assembly (104), the locking rod (116) can be driven to rotate, and the abutting end of the locking rod (116) is separated from the connecting rod (115), and the spring element releases the elastic potential energy to push the moving contact assembly (104) to open.

8. The circuit breaker according to claim 7, characterized in that: The operating member (103) is provided with a protruding structure (117), and the end of the locking rod (116) close to the operating member (103) has a guiding inclined surface (118); the operating member (103) can drive the protruding structure (117) to move linearly away from the moving contact assembly (104), the protruding structure (117) abuts against the guiding inclined surface (118), and the locking rod (116) is pushed to rotate through the guiding inclined surface (118), so that the abutting end of the locking rod (116) is separated from the connecting rod (115).

9. The circuit breaker according to claim 7, characterized in that: The moving contact assembly (104) comprises a moving contact and a free tripping mechanism (119); a sliding groove (120) is arranged on the free tripping mechanism (119); the operating member (103) is connected to the sliding groove (120) of the free tripping structure through a connecting rod (115); in the opening state, the free tripping mechanism (119) locks the connecting rod (115) at one end of the sliding groove (120); and also comprises an electromagnetic tripper (121), the electromagnetic tripper (121) can drive the free tripping mechanism (119) to move, so that the connecting rod (115) is unlocked and slides to the other end of the sliding groove (120), and the abutting end of the locking rod (116) is separated from the connecting rod (115); the moving contact can realize opening through the elastic thrust generated by the arranged contact spring.

10. The circuit breaker according to claim 9, characterized in that It also includes an overload detection component and a control mainboard arranged in the housing (100); the motor (101) and the overload detection component are electrically connected to the control mainboard respectively; in the closed state, the overload detection component detects the current, and when the current or temperature exceeds a threshold value set by the overload detection component and lasts for a predetermined time, the control mainboard can drive the motor (101) to rotate, so that the moving contact component (104) is opened.

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