CN216450575U

CN216450575U - Circuit breaker and distributor

Info

Publication number: CN216450575U
Application number: CN202122178966.2U
Authority: CN
Inventors: 张兰晶; 熊周督
Original assignee: Shenzhen Mailian Electronics Co ltd
Current assignee: Guangdong Mailian Intelligent Electrical Co ltd
Priority date: 2021-09-09
Filing date: 2021-09-09
Publication date: 2022-05-06
Anticipated expiration: 2031-09-09

Abstract

The utility model discloses a circuit breaker and a distributor. The circuit breaker includes a housing; a contact structure disposed within the housing; the driving assembly is arranged in the shell and comprises an electric driving assembly and a manual driving assembly; the transmission assembly is arranged in the shell and is in transmission connection with the driving assembly, and the electric driving assembly and the manual driving assembly can drive the contact structure to be opened and closed through the transmission assembly. The circuit breaker provided by the utility model can realize refined and automatic remote control. The power distributor provided by the utility model comprises the circuit breaker.

Description

Circuit breaker and distributor

Technical Field

The utility model relates to the technical field of power distributors, in particular to a circuit breaker and a power distributor.

Background

In the prior art, a pluggable circuit breaker basically comprises a housing and a pluggable wiring system, wherein an electromagnetic device, a bimetallic element, an actuating mechanism, a contact system and an arc extinguishing system are arranged in the housing, and the pluggable wiring system is provided with an incoming terminal, an outgoing terminal and an intermediate wiring device. The existing circuit breaker generally only has a protection function, namely when fault current exists, after an electromagnetic device or a bimetallic element detects overcurrent, an actuating mechanism is pushed to drive a tripping buckle and a lock catch to be disconnected, so that the circuit of the circuit breaker is disconnected.

Along with the development of 5G communication, data center, wisdom distribution and intelligence fortune dimension, current circuit breaker can not satisfy prior art's requirement gradually, can't realize the automatic control that becomes more meticulous.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve at least one of the problems in the prior related art to a certain extent, and provides a circuit breaker which can realize fine and automatic remote control.

The above purpose is realized by the following technical scheme:

a circuit breaker, comprising:

a housing;

a contact structure disposed within the housing;

the driving assembly is arranged in the shell and comprises an electric driving assembly and a manual driving assembly;

the transmission assembly is arranged in the shell and is in transmission connection with the driving assembly, and the electric driving assembly and the manual driving assembly can drive the contact structure to be opened and closed through the transmission assembly.

Optionally, the electric drive module further comprises a circuit board, wherein the circuit board is arranged in the shell and is in communication connection with the terminal platform and the electric drive module.

Optionally, the contact structure includes a first contact and a second contact, the first contact is disposed within the housing, and the transmission assembly includes:

the moving piece is arranged in the shell and can slide relative to the shell;

the first transmission piece is arranged in the shell and can rotate relative to the shell, and the first transmission piece is in transmission connection with the moving piece;

the second transmission piece is arranged in the shell and can rotate relative to the shell, the second transmission piece is in transmission connection with the first transmission piece, and the second contact is arranged on the second transmission piece;

when the electric driving assembly or the manual driving assembly drives the moving piece to slide relative to the shell along a first direction, the moving piece drives the first transmission piece to rotate clockwise, and the first transmission piece drives the second transmission piece to rotate clockwise until the second contact and the first contact are closed;

when the electric driving assembly or the manual driving assembly drives the moving member to slide relative to the shell along the direction opposite to the first direction, the moving member drives the first transmission member to rotate along the anticlockwise direction, and the first transmission member drives the second transmission member to rotate along the anticlockwise direction until the second contact is disconnected with the first contact.

Optionally, the transmission assembly further comprises:

one end of the first transmission rod is rotatably connected with the moving piece, the other end of the first transmission rod is rotatably connected with the first transmission piece, and the moving piece drives the first transmission piece to rotate relative to the shell through the first transmission rod;

one end of the second transmission rod is rotatably connected with the first transmission piece, the other end of the second transmission rod is in transmission connection with the second transmission piece, and the first transmission piece drives the second transmission piece to rotate relative to the shell through the second transmission rod.

Optionally, the electric drive assembly comprises:

a motor disposed within the housing;

one end of the worm is connected with the output end of the motor;

and the reduction gear set is arranged in the shell and is in meshed transmission connection with the worm, and the transmission assembly is in meshed transmission connection with the output end of the reduction gear set.

Optionally, the reduction gear set comprises:

a primary gear set, including a first gear, a second gear and a first rotating shaft, wherein the first rotating shaft is rotatably installed in the housing, the first gear and the second gear are both arranged on the first rotating shaft, the first gear is in meshing transmission connection with the worm, the radius of the first gear is R2, the radius of the second gear is R1, and R2 is greater than R1;

the second-stage gear set comprises a third gear, a fourth gear and a second rotating shaft, the second rotating shaft is rotatably arranged in the shell, the third gear and the fourth gear are both arranged on the second rotating shaft, the second gear is in meshing transmission connection with the third gear, the radius of the third gear is R3, the radius of the fourth gear is R4, R3 is more than R4, and R3 is more than R2;

tertiary gear train, including fifth gear, sixth gear and third pivot, the third pivot is rotationally installed in the casing, the fifth gear with the sixth gear all sets up in the third pivot, the fourth gear with fifth gear engagement transmission is connected, the sixth gear with transmission component engagement transmission is connected, the radius of fifth gear is R5, the radius of sixth gear is R6, R5 > R6, and R5 > R4.

Optionally, the reduction gear set further comprises a first position detecting structure, the first position detecting structure comprising:

the first microswitch is arranged in the shell and is in communication connection with the circuit board;

the outer side of the rotating wheel is provided with a notch, and the middle part of the rotating wheel is provided with a groove;

the protrusion is arranged on the fifth gear, extends into the groove, the third rotating shaft penetrates through the groove, when the fifth gear rotates relative to the third rotating shaft, the protrusion pushes the rotating wheel to rotate relative to the third rotating shaft, the micro switch detects the position of the notch in real time and sends the position information to the circuit board, and the circuit board controls the motor to be started or stopped according to the position information.

Optionally, the manual drive subassembly includes the manual drive piece, the one end of manual drive piece with the transmission assembly is connected, and outside the other end stretches out the casing, the manual drive piece can pass through under the effect of external force the transmission assembly drive the switching of contact structure.

Optionally, the apparatus further comprises a second position detection structure, wherein the second position detection structure comprises:

the fourth rotating shaft is arranged in the shell;

the middle part of the first bar is arranged on the fourth rotating shaft and can rotate relative to the fourth rotating shaft, and the first end of the first bar extends into a slotted hole formed in the manual driving piece;

the second pole, its first end sets up in the fourth pivot and with the middle part of first pole is connected, and the second end card is established and is seted up drive assembly or in the slot hole on the manual driving spare, work as when the manual driving spare removes, the first end of first pole is followed the slot hole removes, the second end of second pole is followed the slot hole slides, the second end of first pole is stretching out casing and indentation switch between the state of casing.

The utility model also provides a distributor, which comprises the breaker.

Compared with the prior art, the utility model at least comprises the following beneficial effects:

according to the utility model, the electric driving assembly and the manual driving assembly are arranged at the same time, the transmission assembly drives the contact structure to open and close, so that the circuit breaker has two on-off control modes at the same time, and the terminal platform can realize the refined remote control of the operation of the electric driving assembly in a mode of arranging the circuit board in the circuit breaker, so that the on-off effect of the circuit breaker is realized remotely.

Drawings

Fig. 1 is a schematic perspective view of a circuit breaker according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a circuit breaker according to an embodiment of the present invention after an upper cover is removed;

fig. 3 is a schematic perspective view of a circuit breaker according to an embodiment of the present invention, from a viewing angle after the upper cover and the circuit board are removed;

fig. 4 is an assembly view of a driving assembly, a moving member and a second position detecting structure of the circuit breaker according to an embodiment of the present invention;

fig. 5 is a schematic assembly diagram of a tertiary gear, a rotating wheel and a third rotating shaft of the circuit breaker according to the embodiment of the utility model;

fig. 6 is a schematic perspective view of another perspective view of the circuit breaker according to the embodiment of the utility model after the upper cover and the circuit board are removed;

fig. 7 is an enlarged view at a in fig. 6.

In the figure:

100. a first contact; 11. a lower housing; 12. an upper housing;

200. a second contact; 21. a main circuit board; 22. an auxiliary circuit board;

3. a moving member; 31. a first drive lever; 32. a second bump; 33. a limiting block; 331. a long hole; 34. a second groove; 4. a first transmission member; 41. a second transmission rod; 5. a second transmission member;

6. an electric drive assembly; 61. a motor; 63. a worm; 631. a first gear; 632. a second gear; 641. a third gear; 642. a fourth gear; 651. a fifth gear; 652. a sixth gear; 654. a protrusion; 655. a third rotating shaft; 66. a rotating wheel; 661. a groove; 662. a notch;

7. a manual drive member; 71. a second position detection structure; 711. a first bar; 712. a second bar; 713. a fourth rotating shaft; 714. a guide bar; 72. a first bump; 73. a slot; 74. a first groove;

8. a communication interface;

9. a wiring port;

10. a thermal trip system; 101. an electromagnetic system.

Detailed Description

The present invention is illustrated by the following examples, but the present invention is not limited to these examples. Modifications to the embodiments of the utility model or equivalent substitutions of parts of technical features without departing from the spirit of the utility model are intended to be covered by the scope of the claims of the utility model.

Referring to fig. 1 to 7, the present invention provides a circuit breaker, which includes a housing, a contact structure, a driving structure, and a transmission structure. The contact structure is disposed within the housing. The drive assembly is disposed within the housing and includes an electric drive assembly 6 and a manual drive assembly. The transmission assembly is arranged in the shell and is in transmission connection with the driving assembly, and the electric driving assembly 6 and the manual driving assembly can be driven to open and close the contact structure through the transmission assembly.

According to the utility model, the electric driving assembly 6 and the manual driving assembly are arranged at the same time, so that the transmission assembly drives the contact structure to open and close, and the circuit breaker has two on-off control modes at the same time.

Optionally, a circuit board is further included, and the circuit board is disposed in the housing, and is in communication connection with the terminal platform and the electric drive assembly 6.

Optionally, a communication unit is disposed on the circuit board, and the communication unit is configured to, for example, receive a signal sent by the terminal platform and upload information of the circuit board to the terminal platform. For example, in this embodiment, the terminal platform may remotely send a signal for opening and closing the contact structure, and the circuit board receives the signal and drives the electric driving assembly 6 to operate to drive the contact structure to open and close. Therefore, a user can drive the contact structure to be opened and closed through the manual driving assembly at a short distance, and can also control the electric driving assembly 6 to move through the circuit board, so that the electric driving assembly 6 is driven to operate at a long distance to drive the contact structure to be opened and closed.

Optionally, the communication unit comprises a communication interface 8, the communication interface 8 being arranged at an end of the housing and being electrically connected to the circuit board.

Optionally, an arc extinguishing system 102 is further included, the arc extinguishing system 102 being disposed within the housing. The communication interface 8 is electrically connected to the wiring board through the first contact 100.

Optionally, the contact structure comprises a first contact 100 and a second contact 200, the first contact 100 is arranged in the housing, and the transmission assembly comprises a moving member 3, a first transmission member 4 and a second transmission member 5. The moving member 3 is provided in the housing and can slide relative to the housing. The first transmission piece 4 is arranged in the shell and can rotate relative to the shell, and the first transmission piece 4 is in transmission connection with the moving piece 3. The second transmission piece 5 is arranged in the shell and can rotate relative to the shell, the second transmission piece 5 is in transmission connection with the first transmission piece 4, and the second contact 200 is arranged on the second transmission piece 5. When the electric driving assembly 6 or the manual driving assembly drives the moving member 3 to slide relative to the housing along the first direction, the moving member 3 drives the first transmission member 4 to rotate clockwise, and the first transmission member 4 drives the second transmission member 5 to rotate clockwise until the second contact 200 and the first contact 100 are closed; when the electric drive assembly 6 or the manual drive assembly drives the moving member 3 to slide relative to the housing in a direction opposite to the first direction, the moving member 3 drives the first transmission member 4 to rotate counterclockwise, and the first transmission member 4 drives the second transmission member 5 to rotate counterclockwise until the second contact 200 is disconnected from the first contact 100.

Optionally, one side of the moving member 3 is provided with a guide slot hole 73, and the inner side of the housing is provided with a guide block, which is inserted into the guide slot and can slide relative to the guide slot, thereby achieving the sliding connection between the moving member 3 and the housing.

Optionally, the transmission assembly further comprises a first transmission rod 31 and a second transmission rod 41. One end of the first transmission rod 31 is rotatably connected with the moving member 3, the other end of the first transmission rod 31 is rotatably connected with the first transmission member 4, and the moving member 3 drives the first transmission member 4 to rotate relative to the shell through the first transmission rod 31. One end of the second transmission rod 41 is rotatably connected with the first transmission member 4, the other end of the second transmission rod is rotatably connected with the second transmission member 5, and the first transmission member 4 drives the second transmission member 5 to rotate relative to the shell through the second transmission rod 41. Specifically, when the manual driving assembly or the electric driving assembly 6 drives the moving member 3 to move in the first direction, the moving member 3 pushes the first transmission member 4 to rotate clockwise through the first transmission rod 31, and the first transmission member 4 pushes the second transmission member 5 to rotate clockwise through the second transmission rod 41 until the second contact 200 mounted on the second transmission member 5 is closed with the first contact 100 mounted on the housing; when the manual driving assembly or the electric driving assembly 6 drives the moving member 3 to move in a direction opposite to the first direction, the moving member 3 pushes the first transmission member 4 to rotate counterclockwise through the first transmission rod 31, and the first transmission member 4 pushes the second transmission member 5 to rotate counterclockwise through the second transmission rod 41 until the second contact 200 is disconnected from the first contact 100.

Optionally, the electric drive assembly 6 includes a motor 61, a worm 63 and a reduction gear set. The motor 61 is disposed within the housing. One end of the worm 63 is connected to the output of the motor 61. The reduction gear set is arranged in the shell and is in meshed transmission connection with the worm 63, and the transmission assembly is in meshed transmission connection with the output end of the reduction gear set.

Optionally, the reduction gear sets include a primary gear set, a secondary gear set, and a tertiary gear set. The primary gear set comprises a first gear 631, a second gear 632 and a first rotating shaft, the first rotating shaft is rotatably mounted in the housing, the first gear 631 and the second gear 632 are both arranged on the first rotating shaft, the first gear 631 is in meshing transmission connection with the worm 63, the radius of the first gear 631 is R2, the radius of the second gear 632 is R1, and R2 is larger than R1. The secondary gear set comprises a third gear 641, a fourth gear 642 and a second rotating shaft, wherein the second rotating shaft is rotatably arranged in the shell, the third gear 641 and the fourth gear 642 are arranged on the second rotating shaft, the second gear 632 is in meshing transmission connection with the third gear 641, the radius of the third gear 641 is R3, the radius of the fourth gear 642 is R4, R3 is larger than R4, and R3 is larger than R2. The tertiary gear set comprises a fifth gear 651, a sixth gear 652 and a third rotating shaft 655, the third rotating shaft 655 is rotatably arranged in the shell, the fifth gear 651 and the sixth gear 652 are arranged on the third rotating shaft 655, the fourth gear 642 is in meshing transmission connection with the fifth gear 651, the sixth gear 652 is in meshing transmission connection with the transmission component, the radius of the fifth gear 651 is R5, the radius of the sixth gear 652 is R6, R5 is more than R6, and R5 is more than R4. So for reduction gear set obtains better speed reduction effect, and does benefit to and installs in the casing, simplifies the structure. Specifically, the motor 61 drives the worm 63 to rotate, the worm 63 pushes the first-stage gear to rotate, the first-stage gear drives the second-stage gear to rotate, the second-stage gear drives the third-stage gear to rotate, and the third-stage gear drives the moving member 3 to move relative to the shell.

Alternatively, only two teeth are provided on the sixth gear 652, and four or five straight teeth are provided on the moving member 3. Of course, in other embodiments, other numbers of teeth can be disposed on the sixth gear 652 and/or the moving member 3, and the utility model is not limited thereto.

Optionally, two connection ports 9 and two load ports are included, the connection ports 9 being arranged at one end of the housing for electrical connection with a distribution bar of a power distributor, and the communication port 8 being arranged between the two connection ports 9. The load interface is arranged at the other end of the shell and is used for being electrically connected with a load.

Alternatively, the circuit boards include one main circuit board 21 and two sub circuit boards 22. The main circuit board 21 is arranged on the upper side of the gear reduction group, one end of the two auxiliary circuit boards 22 is electrically connected with the main circuit board 21, and the other end is electrically connected with the wiring port 9 of the circuit breaker through a wiring board, wherein the wiring board is arranged in the shell. The main wiring board 21 is electrically connected to the load interface.

Optionally, the main circuit board 21 is provided with an MCU, an electrical signal monitoring unit, an alarm unit, an overvoltage protection unit, a parameter setting unit, a self-checking unit, a fault recording unit, and a control unit. The electric signal monitoring unit is used for detecting the current, power, frequency, temperature, electric quantity and service life of the circuit breaker. The alarm unit is used for giving an alarm when the circuit breaker generates overcurrent, overvoltage and undervoltage. The over-current protection unit is used for protecting the circuit breaker when the circuit breaker is short-circuited, overloaded, leaked, overvoltage, undervoltage, arc fault, over-temperature and exceeds a power limit. The parameter setting unit is used for setting rated current, action limit value, action time and self-checking period of the circuit breaker. The self-checking unit is used for realizing manual self-checking and automatic self-checking of the circuit breaker. The control unit is used for local and remote opening and closing of the circuit breaker.

Optionally, the over-current protection unit comprises an electromagnetic system 101 and a thermal trip system 10. The electromagnetic system 101 and the thermal trip system 10 are continuously operated all the time and used as backup protection of the circuit breaker. When the circuit board is in a normal working state, if the circuit breaker has an electrical fault, the circuit board controls the circuit breaker to be switched on and off so as to realize overcurrent protection of the circuit breaker. When the circuit board is abnormal, the electromagnetic system 101 and the thermal tripping system 10 still keep continuous work, and when the circuit breaker has an electrical fault, the circuit breaker can be still disconnected to protect electrical equipment and personal safety.

Optionally, the reduction gear set further comprises a first position sensing arrangement comprising a first microswitch, a wheel 66 and a projection 654. The first microswitch is arranged in the shell and is in communication connection with the circuit board. A notch 662 is arranged on the outer side of the rotating wheel 66, and a groove 661 is arranged in the middle of the rotating wheel 66. The protrusion 654 is arranged on the fifth gear 651, the protrusion 654 extends into the groove 661, the third rotating shaft 655 penetrates through the groove 661, when the fifth gear 651 rotates relative to the third rotating shaft 655, the protrusion 654 pushes the rotating wheel 66 to rotate relative to the third rotating shaft 655, the micro switch detects the position of the notch 662 in real time and sends the position information to the circuit board, and the circuit board controls the motor 61 to start and stop according to the position information, thereby accurately controlling the opening and closing between the first contact 100 and the second contact 200. When the first contact 100 and the second contact 200 of the circuit breaker are disconnected, the motor 61 continues to rotate, and the first micro switch stops when sensing the time delay of the notch 662 of the rotating wheel 66, so as to move the second contact 200 away from the first contact 100 by a preset distance.

Optionally, the manual driving assembly comprises a manual driving part 7, one end of the manual driving part 7 is connected with the transmission assembly, the other end of the manual driving part extends out of the housing, and the manual driving part 7 can drive the contact structure to be opened and closed through the transmission assembly under the action of external force.

Optionally, one end of the manual driving member 7 located in the housing is connected with the moving member 3 and can slide relative to the housing. The user can push the manual driving member 7 so that the moving member 3 moves in the first direction to close the first contact 100 and the second contact 200, or so that the moving member 3 moves in the direction opposite to the first direction to open the first contact 100 and the second contact 200.

Optionally, the end of the manual drive 7 within the housing is provided with a first recess 74 such that the end of the manual drive 7 within the housing forms a first projection 72. The end of the moving member 3 close to the manual drive member 7 is provided with a second recess 34 so that the end of the moving member 3 close to the manual drive member 7 forms a second projection 32. The second projection 32 is engaged in the first groove 74, and the first projection 72 is engaged in the second groove 34, so as to connect the manual driving member 7 and the moving member 3.

Optionally, a second position detecting structure 71 is further included, and the second position detecting structure 71 includes a fourth rotating shaft 713, a first bar 711, and a second bar 712. The fourth rotation shaft 713 is disposed in the housing. The middle of the first bar 711 is disposed on the fourth rotating shaft 713 and can rotate relative to the fourth rotating shaft 713, and the first end of the first bar 711 extends into the slot 73 formed on the manual driving member 7. The first end of the second bar 712 is disposed on the fourth rotating shaft 713 and connected to the middle of the first bar 711, the second end is engaged with the slot 331 formed in the transmission assembly or the manual driving member 7, when the manual driving member 7 moves, the first end of the first bar 711 moves along the slot 73, the second end of the second bar 712 slides along the slot 331, and the second end of the first bar 711 is switched between a state of extending out of the housing and a state of retracting into the housing. When the circuit breaker is installed on the distribution pole of the distributor, the circuit breaker needs to be installed in the chassis of the distributor, and the first end of the first bar 711 is pressed by the rod on the chassis and retracted into the housing until the first end of the first bar 711 passes over the rod on the chassis, and the first end of the first bar 711 protrudes out of the housing again, at this time, it is stated that the circuit breaker is installed in place.

Optionally, a stopper 33 is further disposed on a side of the moving member 3, and the long hole 331 is formed in the stopper 33.

Optionally, a second end of the second bar 712 is provided with a guide bar 714, the guide bar 714 extending into the slot 331.

Optionally, the circuit breaker further comprises a second microswitch, wherein the second microswitch is installed on the shell or the manual driving part 7 and electrically connected with the circuit board, and is used for detecting the position of the manual driving part 7 and further judging the on-off state of the circuit breaker.

Optionally, the housing comprises an upper housing 12 and a lower housing 11. The upper shell 12 and the lower shell 11 cover to form a cavity, and the contact structure, the driving structure and the transmission assembly are all arranged in the cavity.

Specifically, the on-off process of the circuit breaker provided by this embodiment is as follows:

and if the terminal platform sends a breaking signal, the second microswitch judges the on-off state of the circuit breaker according to the position of the manual driving piece 7. If the circuit breaker is in a connection state, the MCU on the circuit board sends an instruction to the motor 61, and the motor 61 operates to disconnect the circuit breaker; if the circuit breaker is in the open state, the MCU does not send commands to the motor 61 and the motor 61 remains in a non-operational state.

And if the terminal platform sends a path signal, the second microswitch judges the on-off state of the circuit breaker according to the position of the manual driving piece 7. If the circuit breaker is in an off state, the MCU on the circuit board sends an instruction to the motor 61, and the motor 61 operates to enable the circuit breaker to be switched on; if the circuit breaker is in the on state, the MCU does not send commands to the motor 61 and the motor 61 remains in an inoperative state.

The utility model also provides a distributor, which comprises the breaker.

What has been described above are merely some of the embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the utility model.

Claims

1. A circuit breaker, comprising:

a housing;

a contact structure disposed within the housing;

a drive assembly disposed within the housing, the drive assembly including an electric drive assembly (6) and a manual drive assembly;

the transmission assembly is arranged in the shell and is in transmission connection with the driving assembly, and the electric driving assembly (6) and the manual driving assembly can drive the contact structure to be opened and closed through the transmission assembly.

2. The circuit breaker of claim 1, further comprising a circuit board disposed within the housing, the circuit board being communicatively coupled to the terminal platform and the motorized drive assembly (6).

3. The circuit breaker of claim 2 wherein said contact structure comprises a first contact (100) and a second contact (200), said first contact (100) being disposed within said housing, said transmission assembly comprising:

a moving member (3) which is provided in the housing and is slidable relative to the housing;

the first transmission piece (4) is arranged in the shell and can rotate relative to the shell, and the first transmission piece (4) is in transmission connection with the moving piece (3);

the second transmission piece (5) is arranged in the shell and can rotate relative to the shell, the second transmission piece (5) is in transmission connection with the first transmission piece (4), and the second contact (200) is arranged on the second transmission piece (5);

when the electric driving assembly (6) or the manual driving assembly drives the moving piece (3) to slide relative to the shell along a first direction, the moving piece (3) drives the first transmission piece (4) to rotate clockwise, and the first transmission piece (4) drives the second transmission piece (5) to rotate clockwise until the second contact (200) and the first contact (100) are closed;

when the electric driving assembly (6) or the manual driving assembly drives the moving piece (3) to slide relative to the shell along the direction opposite to the first direction, the moving piece (3) drives the first transmission piece (4) to rotate anticlockwise, and the first transmission piece (4) drives the second transmission piece (5) to rotate anticlockwise until the second contact (200) is disconnected from the first contact (100).

4. The circuit breaker of claim 3, wherein the transmission assembly further comprises:

the first transmission rod (31), one end of the first transmission rod (31) is rotatably connected with the moving piece (3), the other end of the first transmission rod is rotatably connected with the first transmission piece (4), and the moving piece (3) drives the first transmission piece (4) to rotate relative to the shell through the first transmission rod (31);

one end of the second transmission rod (41) is rotatably connected with the first transmission piece (4), the other end of the second transmission rod (41) is in transmission connection with the second transmission piece (5), and the first transmission piece (4) drives the second transmission piece (5) to rotate relative to the shell through the second transmission rod (41).

5. The circuit breaker according to any of claims 2-4, wherein the electric drive assembly (6) comprises:

a motor (61) disposed within the housing;

one end of the worm (62) is connected with the output end of the motor (61);

the reduction gear set is arranged in the shell and is in meshed transmission connection with the worm (62), and the transmission assembly is in meshed transmission connection with the output end of the reduction gear set.

6. The circuit breaker of claim 5, wherein the reduction gear set comprises:

a primary gear set, including a first gear (631), a second gear (632) and a first rotating shaft, wherein the first rotating shaft is rotatably installed in the housing, the first gear (631) and the second gear (632) are both arranged on the first rotating shaft, the first gear (631) is in meshing transmission connection with the worm (62), the radius of the first gear (631) is R2, the radius of the second gear (632) is R1, and R2 is greater than R1;

a secondary gear set, including a third gear (641), a fourth gear (642) and a second rotating shaft, wherein the second rotating shaft is rotatably installed in the housing, the third gear (641) and the fourth gear (642) are both arranged on the second rotating shaft, the second gear (632) is in meshing transmission connection with the third gear (641), the radius of the third gear (641) is R3, the radius of the fourth gear (642) is R4, R3 is greater than R4, and R3 is greater than R2;

the third-stage gear set comprises a fifth gear (651), a sixth gear (652) and a third rotating shaft (655), the third rotating shaft (655) is rotatably installed in the shell, the fifth gear (651) and the sixth gear (652) are both arranged on the third rotating shaft (655), the fourth gear (642) is in meshing transmission connection with the fifth gear (651), the sixth gear (652) is in meshing transmission connection with the transmission assembly, the sixth gear is in meshing transmission connection with the transmission assembly, the radius of the fifth gear is R5, the radius of the sixth gear is R6, R5 is greater than R6, and R5 is greater than R4.

7. The circuit breaker of claim 6 wherein said reduction gear set further comprises a first position sensing structure, said first position sensing structure comprising:

the outer side of the rotating wheel (66) is provided with a notch (662), and the middle part of the rotating wheel (66) is provided with a groove (661);

the protrusion (654) is arranged on the fifth gear (651), the protrusion (654) extends into the groove (661), the third rotating shaft (655) penetrates through the groove (661), when the fifth gear (651) rotates relative to the third rotating shaft (655), the protrusion (654) pushes the rotating wheel (66) to rotate relative to the third rotating shaft (655), the microswitch detects the position of the notch (662) in real time and sends the position information to the circuit board, and the circuit board controls the motor (61) to start and stop according to the position information.

8. The circuit breaker according to any of claims 2-4, wherein the manual driving assembly comprises a manual driving member (7), one end of the manual driving member (7) is connected to the transmission assembly, and the other end of the manual driving member extends out of the housing, and the manual driving member (7) can drive the contact structure to open and close through the transmission assembly under the action of external force.

9. The circuit breaker according to claim 8, further comprising a second position detection structure (71), the second position detection structure (71) comprising:

a fourth rotation shaft (713) provided in the housing;

the middle part of the first bar (711) is arranged on the fourth rotating shaft (713) and can rotate relative to the fourth rotating shaft (713), and the first end of the first bar (711) extends into a slotted hole (73) formed in the manual driving piece (7);

and a second bar (712), a first end of which is arranged on the fourth rotating shaft (713) and connected with the middle part of the first bar (711), a second end of which is clamped in a long hole (331) formed in the transmission component or the manual driving part (7), when the manual driving part (7) moves, the first end of the first bar (711) moves along the slotted hole (73), a second end of the second bar (712) slides along the long hole (331), and the second end of the first bar (711) is switched between a state of extending out of the shell and a state of retracting into the shell.

10. A power distributor, characterized in that it comprises a circuit breaker according to any one of claims 1 to 9.