CN113838711A

CN113838711A - Automatic switching-on and switching-off circuit breaker

Info

Publication number: CN113838711A
Application number: CN202010514985.5A
Authority: CN
Inventors: 邓彦军; 卢科军
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2020-06-08
Filing date: 2020-06-08
Publication date: 2021-12-24

Abstract

An automatic switching-on and switching-off circuit breaker comprises a shell, wherein a wire inlet terminal and a wire outlet terminal are respectively arranged on two sides of the shell, and a partition plate, an operating mechanism, a contact mechanism, an arc extinguishing system, a motor and an electronic circuit board are arranged between the wire inlet terminal and the wire outlet terminal; the electronic circuit board is laid in the shell, the handle and the operating mechanism are arranged on the upper portion of the shell, the contact mechanism is arranged in the middle of the shell, the arc extinguishing mechanism is arranged on the lower portion of the shell, the short-circuit protection mechanism is arranged between the arc extinguishing system and the handle, the motor is arranged between the incoming line terminal and the contact mechanism, the transmission mechanism is arranged between the motor and the handle, the overload protection mechanism is arranged between the outgoing line terminal and the short-circuit protection mechanism, and the operating mechanism, the contact mechanism, the transmission mechanism and the electronic circuit board are separated by the partition board. The motor, the electronic circuit board, the operating mechanism, the contact mechanism and the like are all arranged in the same space of the circuit breaker, and the circuit breaker is separated by the partition plate, so that the product volume is effectively reduced.

Description

Automatic switching-on and switching-off circuit breaker

Technical Field

The invention relates to a low-voltage apparatus, in particular to an automatic switching-on/off circuit breaker.

Background

The development trend of the existing miniature circuit breaker is that the miniature circuit breaker is required to have an automatic switching-on and switching-off function besides a traditional manual switching-on and switching-off function, particularly along with the development of a smart power grid, the demand of a prepayment miniature circuit breaker is continuously increased, and the ordinary prepayment miniature circuit breaker cannot realize the automatic switching-on function after arrearage automatic tripping and power failure and user recharging, so that great inconvenience is brought to users.

The existing driving device of the automatic opening and closing circuit breaker is generally powered by a motor and a gear set, and the existing automatic opening and closing circuit breaker is a structure formed by splicing a circuit breaker module and a motor driving module.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides the automatic opening and closing circuit breaker with compact structure and high reliability.

In order to achieve the purpose, the invention adopts the following technical scheme:

an automatic switching-on and switching-off circuit breaker comprises a shell and a handle rotatably mounted on the shell, wherein both sides of the shell are respectively provided with an incoming line terminal and an outgoing line terminal, and an operating mechanism, a contact mechanism, an arc extinguishing system, a short-circuit protection mechanism, a motor and an electronic circuit board are arranged between the incoming line terminal and the outgoing line terminal; the handle and the operating mechanism are arranged on the upper part of the shell, the handle is connected with the operating mechanism, the contact mechanism is positioned in the middle of the shell, a moving contact of the contact mechanism is connected with the operating mechanism, the motor is positioned between the incoming line terminal and the contact mechanism, a transmission mechanism is arranged between the motor and the handle, the motor is controlled to rotate by a control circuit on the electronic circuit board, and the transmission mechanism is driven by the motor to rotate so as to realize the automatic switching-on and switching-off of the circuit breaker; the arc extinguishing system is arranged at the lower part of the shell, and the short-circuit protection mechanism is arranged between the arc extinguishing system and the handle; still be equipped with the baffle in the casing, on circuit breaker thickness direction, operating device and drive mechanism set up the surperficial upside at electronic circuit board, just drive mechanism is located between electronic circuit board and the operating device, the baffle sets up between drive mechanism and operating device, contact mechanism are located the surperficial one side of baffle, and drive mechanism, electronic circuit board and motor are located back one side of baffle.

Further, the partition board comprises a first partition part and a second partition part which are integrally formed, the lower part of the first partition part is connected with the upper part of the second partition part, the first partition part is used for separating the operating mechanism from the transmission mechanism and the electronic circuit board, and the second partition part is used for separating the motor and the electronic circuit board from the contact mechanism and the arc extinguishing system.

Furthermore, an extension part is formed by extending one side of the first partition part towards the handle direction, the upper edge of the extension part is a downward-concave arc-shaped concave edge, the arc-shaped concave edge is used for avoiding the lower part of the handle, an installation part is arranged on one side of the arc-shaped concave edge close to the shell, and the installation part is used for fixedly installing the partition plate in the shell; one side of installation department is equipped with convex spacing portion, spacing portion be arranged in with the handle in the torsional spring cooperation, take place elastic deformation for the torsional spring at the handle rotation in-process and provide fixed spacing portion.

Furthermore, the edge of one side, far away from the arc extinguishing system, of the second partition part extends outwards to form a convex edge, the convex edge surrounds a part, close to one side of the arc extinguishing system, of the second partition part to form a matching space, a moving contact of the contact mechanism penetrates through the first partition part to extend into the matching space, and the moving contact swings in the matching space and completes the action process of closing and opening with the static contact;

one side of the second partition part, which is far away from the arc extinguishing system, is provided with an extension plate, and the extension plate is used for wrapping the outer side of the motor, so that the motor and the electronic circuit board are positioned on one side of the back surface of the partition plate simultaneously.

Further, the arc extinguishing system comprises an arc extinguishing chamber, and an arc striking plate is arranged on one side of the arc extinguishing chamber close to the incoming line terminal;

the electronic circuit board becomes the Z style of calligraphy, including last xarm circuit board, trailing arm circuit board and lower xarm circuit board, on circuit breaker width direction, trailing arm circuit board one side is short-circuit protection mechanism and arc extinguishing system's explosion chamber, and the opposite side is the motor, and on circuit breaker direction of height, lower xarm circuit board is located motor below one side, and on circuit breaker thickness direction, run-on board, operating device range upon range of on the trailing arm circuit board, and handle, operating device and drive mechanism range upon range of on the last xarm circuit board.

Further, still be equipped with current detection mechanism in the casing, current detection mechanism sets up between short-circuit protection mechanism and leading-out terminal, current detection mechanism includes current transformer, current transformer sets up between short-circuit protection mechanism and leading-out terminal, and current transformer is connected with electronic circuit board's control circuit, and after the control circuit of electronic circuit board judged the overload according to the signal that current transformer detected, electronic circuit board control motor rotated and triggered operating device and tripped the circuit breaker.

Further, drive mechanism include worm, a plurality of drive gear and with operating device's hasp complex intermediate gear and with handle complex handle gear, the motor is connected with the worm, a plurality of drive gear, intermediate gear, handle gear mesh transmission in proper order, and handle gear and handle are installed on same connecting axle, and the corotation of electronic circuit board's control circuit driving motor drives the handle through drive mechanism's handle gear and rotates to the direction of closing a floodgate and realize closing a floodgate.

Further, the intermediate gear is provided with a second limiting part, the operating mechanism comprises a support which is pivotally arranged in the shell, and a lock catch and a jump buckle which are respectively pivotally arranged on the support, the lock catch is in hasp fit with the jump buckle, a connecting rod used for being connected with the handle is arranged on the jump buckle, a moving contact of the contact mechanism is connected with the support, the operating mechanism is further provided with a brake separating piece, one end of the brake separating piece is connected with the lock catch, the other end of the brake separating piece is correspondingly arranged with the intermediate gear, the motor rotates reversely under the control of the electronic circuit board to drive the intermediate gear to rotate, the second limiting part of the intermediate gear enables a hasp structure formed by the lock catch and the jump buckle in the operating mechanism to be unlocked through the brake separating piece, and then the circuit breaker is tripped to realize circuit breaker brake separation.

Furthermore, a first limiting part is convexly arranged on one side of the handle gear, which is close to the handle, and a closing part matched with the first limiting part is convexly arranged on one side of the handle, which is close to the handle gear; when the switch is switched on, the motor rotates in the forward direction under the control of the electronic circuit board, and the first limiting part and the switch-on part are in limiting fit to enable the handle gear to drive the handle to rotate in the switch-on direction and drive the operating mechanism to enable the contact mechanism to be switched on.

Further, a position identification mechanism for identifying the position of the handle gear is arranged between the handle gear and the electronic circuit board, the position identification mechanism comprises an identification point and a positioning point which are respectively arranged on the handle gear and the electronic circuit board, and when the identification point is matched with the positioning point, the electronic circuit board controls the motor to rotate according to the position of the handle gear;

the locating point is arranged on the electronic circuit board opposite to the handle gear, the locating point comprises a starting point position formed by a conducting strip, a first end point position corresponding to a switch-on position and a second end point position corresponding to a switch-off position, the starting point position is located between the first end point position and the second end point position, an identification point is arranged on one side, close to the electronic circuit board, of the handle gear, the identification point is provided with a U-shaped conducting strip which can be connected with the conducting strip on the electronic circuit board to form a loop, the position where the handle gear is located at the moment can be provided for the electronic circuit board when the U-shaped conducting strip is in contact with the conducting strip on the electronic circuit board to form the loop, and the electronic circuit board controls the rotation of the motor according to the position where the handle gear is located.

According to the automatic opening and closing circuit breaker, the motor, the electronic circuit board, the operating mechanism, the contact mechanism and the like are arranged in the same space of the circuit breaker, and the motor and the electronic circuit board are separated from the operating mechanism, the contact mechanism and the arc extinguishing system by the partition plates, so that the motor and the electronic circuit board are integrated in the limited circuit breaker space, and the product volume is effectively reduced. Meanwhile, the motor is arranged between the contact mechanism and the incoming line terminal, the transmission structure is arranged between the motor and the handle, the motor, the transmission module and the breaker module can be integrated in the range of about 18cm wide, and the product size is effectively reduced.

In addition, the partition board is divided into the first partition part and the second partition part, so that the partition effect is realized, meanwhile, a supporting effect and an action space are provided for parts in the shell, and the compactness of the internal structure of the circuit breaker is enhanced.

Drawings

Fig. 1-4 are schematic diagrams of the internal structure of the automatic opening and closing circuit breaker of the invention;

FIG. 5 is a schematic structural diagram of an electronic circuit board in the automatic opening and closing circuit breaker of the present invention;

fig. 6 is a schematic diagram of the internal structure of the automatic opening and closing circuit breaker of the present invention (without a partition);

fig. 7-8 are schematic structural diagrams of the transmission mechanism and the motor of the automatic opening and closing circuit breaker of the invention;

fig. 9 is a schematic structural view (without partition) of the internal components of the automatic opening and closing circuit breaker of the present invention;

fig. 10 is a schematic structural diagram of a handle, a transmission mechanism and a motor in the automatic opening and closing circuit breaker of the invention;

fig. 11-13 are schematic structural views of a handle, an operating mechanism and a partition plate in the automatic opening and closing circuit breaker of the invention;

fig. 14 is a schematic structural view of a position recognition mechanism in the automatic opening and closing circuit breaker of the present invention;

fig. 15 to 16 are schematic structural views of a position recognition structure in the automatic opening and closing circuit breaker of the present invention;

FIG. 17 is a schematic structural view of a U-shaped conductive strip in the automatic opening and closing circuit breaker of the present invention;

fig. 18 is a schematic structural view of a partition plate in the automatic opening and closing circuit breaker of the present invention.

Detailed Description

The following further describes a specific embodiment of the automatic opening and closing circuit breaker according to the present invention with reference to the embodiments shown in fig. 1 to 18. An automatic opening and closing circuit breaker of the present invention is not limited to the description of the following embodiments.

An automatic switching-on and switching-off circuit breaker comprises a shell and a handle 1 rotatably mounted on the shell, wherein an incoming line terminal 91 and an outgoing line terminal 92 are respectively arranged on two sides of the shell, and an operating mechanism 2, a contact mechanism 4, an arc extinguishing system 7, a motor 93 and an electronic circuit board 8 are arranged between the incoming line terminal 91 and the outgoing line terminal 92; a transmission mechanism 3 is arranged between the motor 93 and the handle 1, a control circuit is arranged on the electronic circuit board 8, the electronic circuit board 8 controls the motor 93 to rotate through the control circuit and is driven by the transmission mechanism 3, and the automatic opening and closing of the contact mechanism 4 are realized under the matching of the transmission mechanism 3, the handle 1 and the operating mechanism 2.

As shown in fig. 1, the horizontal direction of fig. 1 is the width direction of the circuit breaker, the vertical direction is the height direction of the circuit breaker, and the direction perpendicular to the plane of the horizontal direction and the vertical direction is the thickness direction of the circuit breaker. The electronic circuit board 8 is laid in the shell between the incoming line terminal 91 and the outgoing line terminal 92, and the operating mechanism 2 and the transmission mechanism 3 are arranged on the upper side of the surface of the electronic circuit board 8 in a stacking mode in the thickness direction of the circuit breaker; the handle 1 and the operating mechanism 2 are arranged on the upper part of the shell together, and the handle 1 is connected with the operating mechanism 2; the contact mechanism 4 is positioned in the middle of the shell, and a moving contact 41 of the contact mechanism 4 is connected with the operating mechanism 2; the motor 93 is positioned between the incoming line terminal 91 and the contact mechanism 4, the transmission mechanism 3 is positioned between the motor 93 and the handle 1, the transmission mechanism 3 transmits the power of the motor 93 to the handle 1, the control circuit on the electronic circuit board 8 controls the motor 93 to rotate, and the transmission mechanism 3 rotates under the driving of the motor 93 to realize the automatic opening and closing of the circuit breaker; the arc extinguishing system 7 is arranged at the lower part of the shell, the arc extinguishing system 7 is positioned at one side of the contact mechanism 4, and electric arcs generated after the contact mechanism 4 is switched on and off are led into the arc extinguishing system to be extinguished; a short-circuit protection mechanism 6 is further arranged in the shell, the short-circuit protection mechanism 6 is located between the arc extinguishing system 7 and the handle 1, and a current detection device is arranged between the short-circuit protection mechanism 6 and the outlet terminal 92.

Still be equipped with baffle 5 in the casing, on the circuit breaker thickness direction, operating device 2, contact mechanism 4 and drive mechanism 3 set up the surperficial upside at electronic circuit board 8, just drive mechanism 3 is located between electronic circuit board 8 and the operating device 2, baffle 5 sets up between drive mechanism 3 and operating device 2, contact mechanism 4 are located baffle 5's surperficial one side, and drive mechanism 3, electronic circuit board 8 and motor 93 are located baffle 5's back one side.

As shown in fig. 2-6, the operating mechanism 2 includes a support pivotally mounted in the housing, and a latch 22 and a trip 21 pivotally mounted on the support respectively, the latch 22 is in snap-fit with the trip 21, a link 23 for connecting with the handle 1 is disposed on the trip 21, and a movable contact 41 of the contact mechanism 4 is connected with the support. Preferably, the movable contact 41 is fixedly mounted with the support. The contact mechanism 4 comprises a moving contact 41 and a fixed contact 42 which are located in the middle of the housing and are arranged oppositely, the fixed contact 42 is arranged on one side of the arc extinguishing system 7 close to the motor 93, and the operating mechanism 2 drives the moving contact 41 to rotate between the motor 93 and the fixed contact 42 for being matched with the fixed contact 42 to realize opening and closing of the contact mechanism 4.

The manual switching-on and switching-off of the contact mechanism 4 is realized through the operating handle 1, under the condition that the jump buckle 21 is in hasp fit with the lock buckle 22, in the swinging process of the operating handle 1, the handle 1 drives the operating mechanism 2 to rotate through the connecting rod 23, and meanwhile, the moving contact 41 of the contact mechanism 4 is contacted with and separated from the static contact 42 along with the rotation of the operating mechanism 2, so that the switching-on and switching-off of the circuit breaker are realized.

The short-circuit protection mechanism 6 comprises an electromagnetic release which is positioned on one side of the operating mechanism 2, and when a short-circuit fault occurs on a circuit, the electromagnetic release is triggered to unlock and release the lock 22 and the trip 21 of the operating mechanism 2 so as to drive the moving contact 41 to realize opening. Specifically, the short-circuit protection mechanism 6 includes an electromagnetic trip, the electromagnetic trip includes a magnetic yoke, a coil 61 disposed on the magnetic yoke and connected to the static contact 42, and an iron core disposed inside the coil 61, one end of the static contact plate is connected to the magnetic yoke, two ends of the coil 61 are respectively connected to the outgoing line terminal 92 and the static contact plate, and the coil 61 drives the iron core to unlock the operating mechanism 2 when the line is short-circuited.

The electronic circuit 5 is laid in the shell, preferably the electronic circuit board 8 is correspondingly arranged at the position corresponding to the handle 1, the operating mechanism 2, the contact mechanism 4 and the transmission mechanism 3, and the handle 1, the operating mechanism 2 and the contact mechanism 4 are laminated on the surface of the electronic circuit board 8, so that the space in the shell is fully utilized and the interference among parts is reduced.

In the preferred embodiment shown in fig. 5-7, the arc extinguishing system 7 includes an arc extinguishing chamber, and an arc striking plate 72 is provided on a side of the arc extinguishing chamber near the incoming line terminal 91; the electronic circuit board 8 becomes the Z style of calligraphy, including last xarm circuit board, trailing arm circuit board and lower xarm circuit board, in circuit breaker width direction, trailing arm circuit board one side is short-circuit protection mechanism 6 and arc extinguishing system 7's explosion chamber, and the opposite side is motor 93, and in circuit breaker direction of height, lower xarm circuit board is located motor 93 below one side, and in circuit breaker thickness direction, arc striking board 72, operating device 2 of arc extinguishing system 7 range upon range of on the trailing arm circuit board, and handle 1, operating device 2 and drive mechanism 3 range upon range of on last xarm circuit board.

Of course, the electronic circuit board 8 can be completely laid in the housing, which requires a corresponding avoiding area to be arranged according to the shape of the parts in the housing, and increases the overall thickness of the circuit breaker. The electronic circuit board 8 is provided with a control circuit for controlling the rotation of the motor 93, and the motor 93 is matched with the transmission mechanism 3, so that the transmission mechanism 3 is matched with the operating mechanism 2 to realize the automatic opening and closing of the circuit breaker. When the switch is switched on, the control circuit drives the motor 93 to rotate in the positive direction, and the transmission mechanism 3 drives the handle 1 to drive the moving contact 41 to switch on through the operating mechanism 2; when the brake is opened, the control circuit drives the motor 93 to rotate reversely, and the transmission mechanism 3 triggers the operating mechanism 2 to trip to drive the moving contact 41 to open the brake. The control circuit comprises a microprocessor, and the microprocessor is connected with the motor 93 and controls the forward rotation and the reverse rotation of the motor 93. The microprocessor is also in communication connection with a remote upper computer or is connected with equipment such as an electric energy meter and the like. Of course, the microprocessor may not be provided, and the forward rotation and the reverse rotation of the motor 93 may be controlled by a hardware circuit.

Arc extinguishing system 7 sets up in the lower part of casing, and is located one side of contact mechanism 4, arc extinguishing system 7 is including setting up the explosion chamber in the casing lower part one side that the explosion chamber is close to incoming wire terminal 91 is equipped with run-on board 72, produced electric arc when run-on board 72 closes contact mechanism 4 divide-shut brake is equipped with exhaust passage 71 between explosion chamber and leading-out terminal 93 in introducing the explosion chamber, exhaust passage 71 is used for the electric arc tail gas exhaust casing with the explosion chamber with the gas vent intercommunication of casing.

The overload protection mechanism comprises a current transformer 94, the current transformer 94 is arranged between the short-circuit protection mechanism 6 and the outlet terminal 92, the current transformer 94 is connected with a control circuit of the electronic circuit board 8, when the circuit is overloaded, the current transformer 94 collects current signals and transmits the current signals to the control circuit of the electronic circuit board 8, the motor 93 is driven to rotate after the control circuit judges that the overload occurs, and the motor 93 drives the transmission mechanism 3 to enable the operating mechanism 2 to be tripped to drive the moving contact 41 to realize tripping. The microprocessor of the control circuit determines whether overload occurs according to the current signal of the current transformer 94, which belongs to the prior art in the field and is not described again.

The transmission mechanism 3 is in transmission connection with a motor 93, and the rotation of the motor 93 drives the transmission mechanism 3 to enable the operating mechanism 2 to drive the contact mechanism 4 to be switched on and off. The transmission mechanism 3 comprises a handle gear 31 coaxially mounted with the handle 1 and an intermediate gear 32 matched with the operating mechanism 2, when the switch is switched on, the motor 93 rotates to enable the handle gear 31 and the handle 1 to be matched and rotate together under the action of the transmission mechanism 3, and the operating mechanism 2 drives the moving contact 41 to be switched on by the handle 1; during opening, the motor 93 rotates to rotate the intermediate gear 32, and the lock 22 is driven by the opening component 24 under the rotation of the intermediate gear 32, so that the operating mechanism 2 is released to drive the movable contact 41 to open.

The automatic opening and closing circuit breaker has the advantages that the motor 93, the electronic circuit board 8, the operating mechanism 2, the contact mechanism 4 and the like are arranged in the same space of the circuit breaker, the motor 93 and the electronic circuit board 8 are separated from the operating mechanism 2, the contact mechanism 4 and the arc extinguishing system 7 by the partition plates 5, the motor 93 and the electronic circuit board 8 are integrated in the limited space of the circuit breaker, and the size of a product is effectively reduced. Meanwhile, the motor 93 is arranged between the contact mechanism 4 and the incoming line terminal 91, the transmission structure 3 is arranged between the motor 93 and the handle 1, the motor 93, the transmission module and the breaker module can be integrated in the range of about 18cm wide, and the product volume is effectively reduced.

Particularly, the electronic circuit board 8, the transmission mechanism 3, the partition board 5 and the operating mechanism 2 are sequentially stacked, and the rotating fulcrum 514 is arranged on the partition board 5, so that the structure is compact and the assembly process is simple. Meanwhile, the overload protection mechanism is not provided with an independent trigger mechanism, and tripping and brake separating are realized by utilizing the motor 93 and the transmission mechanism 3 which are automatically switched on and off, so that the space is greatly saved.

Compared with the general transmission mechanism 3, another improvement of the transmission mechanism 3 of the present invention is that the transmission mechanism 3 is provided with a one-way limiting structure, and the one-way limiting structure is that when the motor 93 rotates in one direction, the function of limiting and matching can be achieved, but when the motor 93 rotates in the opposite direction, the function of limiting and matching cannot be achieved. Referring to fig. 7, 8 and 10, the one-way limiting structure on the transmission mechanism 3 includes a first limiting portion 311 and a second limiting portion 321 that are separated from each other, the first limiting portion 311 is disposed on a handle gear 31 that is coaxially mounted with the handle 1, a closing portion 13 that is in limiting fit with the first limiting portion 311 is correspondingly disposed on the handle 1, when closing is performed, the motor 93 rotates forward under the control of the electronic circuit board 8, the first limiting portion 311 on the handle gear 31 is in limiting fit with the closing portion 13 of the handle 1, so that the handle gear 31 drives the handle 1 to rotate in a closing direction and drives the operating mechanism 2 to close the contact mechanism 4, after closing is completed, the electronic circuit board 8 drives the motor 93 to rotate reversely, the handle gear 31 rotates reversely to avoid the handle 1, the first limiting portion 311 on the handle gear 31 is out of limiting fit with the handle 1 to prevent the manual opening operation of the handle 1 from being affected, the handle 1 is kept at the switching-on position, and the handle 1 is not driven to rotate by the reverse rotation of the handle gear 31. The second limiting part 321 is arranged on the intermediate gear 32, the operating mechanism 2 is provided with a brake separating piece 24 matched with the second limiting part 321, one end of the brake separating piece 24 is matched with the second limiting part 321, and the other end of the brake separating piece 24 is matched with the lock catch 22 of the operating mechanism 2; during brake opening, the electronic circuit board 8 drives the motor 93 to rotate reversely, the intermediate gear 32 rotates and drives the brake opening piece 24 through the second limiting part 321, the brake opening piece 24 pushes the lock catch 22 to unlock the lock catch 22 and the trip catch 21 (see fig. 2) to trigger the operating mechanism 2 to trip, the contact mechanism 4 is switched off (the brake opening piece 24 is shown in fig. 12 and 13), at the moment, the handle 1 returns to a brake opening position along with the operating mechanism 2, after the brake opening is finished, the electronic circuit board 8 drives the motor 93 to rotate forwardly, and the intermediate gear 32 rotates and resets to enable the second limiting part 321 to avoid the brake opening piece 24. Compared with a structure which is provided with a one-way limiting structure and simultaneously realizes switching-on and switching-off functions, the first limiting part 311 and the second limiting part 321 are respectively in one-way limiting fit, the transmission mechanism 3 is respectively matched with different mechanisms, the design difficulty of the one-way limiting structure is reduced, the one-way limiting structure is respectively matched with the switching-on part 13 of the handle 1 and the switching-off part 24 of the operating mechanism 2, the structure for automatic switching-on is separated from the handle 1, the function separation of automatic switching-off and automatic switching-on is realized, but the one-way limiting structure is comprehensively arranged on the transmission mechanism 3 at the same time, the matching difficulty of the handle 1 and the transmission mechanism 3 is reduced, and meanwhile, the mutual interference during automatic switching-on and automatic switching-off is also avoided. In the present invention, the forward rotation and the reverse rotation of the motor 93 are opposite directions, and do not necessarily mean that the forward rotation is a specific direction.

The transmission mechanism 3 is arranged opposite to the electronic circuit board 8, the one-way limiting structure is arranged on one side, back to the electronic circuit board 8, of the transmission mechanism 3, the transmission mechanism 3 comprises a handle gear 31 which is coaxially and rotatably installed with the handle 1, a first limiting part 311 is arranged on one side, close to the handle 1, of the handle gear 31 in a protruding mode, correspondingly, the handle 1 of the circuit breaker is also correspondingly improved, a closing part 13 matched with the first limiting part 311 is arranged on one side, close to the handle gear 31, of the handle 1 in a protruding mode, and at the moment, the first limiting part 311 and the closing part 13 are of a relatively protruding structure; when the electronic circuit board 8 is controlled to be switched on, the motor 93 rotates in the forward direction, the handle gear 31 rotates under the transmission action of the transmission mechanism 3, after the first limiting part 311 is in limiting fit with the switching-on part 13, the handle gear 31 drives the handle 1 to rotate in the switching-on direction, and the rotation of the handle 1 enables the operating mechanism 2 to drive the contact mechanism 4 to be switched on; after the contact mechanism 4 is switched on in place, the electronic circuit board 8 controls the motor 93 to rotate reversely, the handle gear 31 rotates reversely to the initial position, and in the process that the handle gear 31 rotates reversely to the initial position, the handle 1 is kept static, so that the first limiting part 311 and the switching-on part 13 are disengaged from limiting fit, the influence on manual switching-off of the circuit breaker is prevented, and when the motor 93 continues to rotate reversely to drive the operating mechanism 2 to switch off, the first limiting part 311 and the switching-on part 13 are far away due to reverse rotation of the motor 93.

Specifically, as shown in fig. 10, the handle 1 includes a rotating disc 11 and a handle 12 for operating the rotating disc 11 to rotate, the handle 12 is integrally formed with the rotating disc 11, a boss serving as a closing portion 13 is provided on a side of the rotating disc 11 opposite to the handle 12, the boss serving as the closing portion 13 can be placed at any position of a circumference, but preferably, in a direction shown in fig. 10, a circumferential portion from the handle 12 to the closing portion 13 is taken as a closing circumference of the handle 1 clockwise, a circumferential portion from the closing portion 13 to the handle 12 is taken as an opening circumference of the handle 1, a central angle corresponding to the closing circumference is preferably larger than a central angle corresponding to the opening circumference, and a central angle corresponding to the closing circumference is larger than 180 °. The handle gear 31 is provided with a half-cycle of meshing gear teeth, the half-cycle of meshing gear teeth is located on one side close to the motor 93, the half-cycle of meshing gear teeth corresponds to the closing circumference of the handle 1, preferably, two ends of the half-cycle of meshing gear teeth are located between the handle 12 and the closing part 13, the first limiting part 311 is a boss protruding from the handle gear 31, preferably, the first limiting part 311 corresponds to one side provided with the half-cycle of meshing gear teeth and is located on one end close to the closing part 13, and in fig. 10, the handle gear 31 is meshed with the intermediate gear 32 through the half-cycle of meshing gear teeth. Of course, since the engaging teeth of the handle gear 31 are related to the working angle of the handle 1, the first position-limiting portion 311 may not be disposed corresponding to the engaging teeth.

Drive mechanism 3 includes intermediate gear 32 be equipped with the spacing portion 321 of second on the intermediate gear 32, the spacing portion 321 of second is located one side that intermediate gear 32 is close to handle 1, and is corresponding, and operating device 2 is equipped with branch floodgate spare 24, and branch floodgate spare 24 one end is connected with hasp 22, and the other end corresponds the setting with branch floodgate spare 24, branch floodgate spare 24 is used for the hasp 21 of unblock operating device 2 and the hasp structure that hasp 22 formed. When the circuit breaker is opened, the motor 93 rotates reversely under the control of the electronic circuit board 8 to drive the intermediate gear 32 to rotate, the second limiting portion 321 of the intermediate gear 32 enables the hasp structure formed by the hasp 22 and the tripping buckle 21 in the operating mechanism 2 to be unlocked through the switch-off piece 24, the circuit breaker is further enabled to be tripped to realize the circuit breaker opening, and the operating mechanism 2 enables the handle 1 to rotate to the switch-off position while the contact mechanism 4 opens the circuit breaker.

Specifically, as shown in fig. 10, a boss is convexly provided on one side of the intermediate gear 32 as a second limiting portion 321, the second limiting portion 321 is located on one side close to the handle gear 31, the second limiting portion 321 includes a cross arm and a longitudinal arm, the cross arm and the longitudinal arm are connected to form an L shape, wherein the cross arm is used for driving the tripping device 24 to trip, and the longitudinal arm is used for blocking the tripping device 24 after tripping to prevent reclosing. The crossbar of the second limiting portion 321 is engaged with the opening member 24. The opening member 24 is preferably arranged on the lock catch 22, the opening member 24 is rod-shaped as a whole, one end of the opening member 24 is hinged to the lock catch 22 as a connecting end, and the other end of the opening member 24 is used as a free end to be matched with the second limiting part 321. When the motor 93 drives the transmission mechanism 3 to rotate, the free end of the opening piece 24 is in limit fit with the second limit part 321, the opening piece 24 rotates along with the rotation of the intermediate gear 32 and unlocks the tripping buckle 21 and the lock buckle 22, and therefore the contact mechanism 4 is opened. Preferably, a rotating fulcrum 514 corresponding to the middle part of the opening member 24 is provided in the housing, and the middle part of the opening member 24 rotates around the rotating fulcrum 514 so that the connecting end drives the lock 22 to unlock the jump buckle 21. When a product needs to be limited to be switched on, the motor 93 rotates to the tripping position and is not moved, the mechanism is switched off through the cross arm of the second limiting part 321, the switching-off part 24 returns to the initial position, at the moment, the motor 93 is not moved, the gear 32 is still at the switching-off position, the longitudinal arm of the second limiting part 321 is used for blocking the switching-off part 24, and when the product is switched on manually, the switching-off part 24 cannot rotate, the tripping buckle and the lock catch cannot be continuously overlapped, so that the switching-on operation cannot be completed.

The specific operating mechanism 2 is shown in fig. 2, 9 and 11, the operating mechanism 2 includes a support which is pivotally mounted, and a latch 22 and a trip 21 which are pivotally mounted on the support respectively, one end of the latch 22 is hinged with a brake separating member 24, one end of the latch 22 and one end of the trip 21 are in mutual snap-fit, the other end of the trip 21 is connected with the handle 1 through a connecting rod 23, a movable contact 41 of the contact mechanism 4 is coaxially mounted with the support, and an energy storage mechanism is arranged on the support. The operating mechanism 2 keeps balance when the lock 22 and the jump buckle 21 are mutually in hasp fit, the operating mechanism 2 drives the movable contact 41 to swing through the swing of the handle 1, and the swing of the movable contact 41 completes the action of contacting and separating with and from the fixed contact 42. The motor 93 can drive the opening of the contact mechanism 4 through the driving of the transmission mechanism 3, the driving of the short-circuit protection mechanism 6 or the direct manual operation of the handle 1, the operating mechanism 2 drives the moving contact 41 to swing through the swinging of the handle 1, the swinging of the moving contact 41 completes the separation action from the static contact 42 to realize the opening, the motor 93 drives the opening part 24 to push the lock 22 through the transmission mechanism 3, the iron core of the short-circuit protection mechanism 6 pushes the lock 22 to unlock the lock 22 and the trip 21, the operating mechanism 2 loses balance and drives the opening of the contact mechanism 4 through the energy release of the energy storage mechanism. It should be noted that, in the automatic closing process of the present application, when the motor 93 rotates in the forward direction, the transmission mechanism 3 is in limit fit with the handle 1 through the one-way limit structure to enable the handle 1 to rotate in the closing direction, and the handle 1 enables the operating mechanism 2 to drive the contact mechanism 4 to close under the action of the connecting rod 23; when the switch is switched on in place and the switch is automatically switched off, the reverse rotation of the motor 93 does not enable the handle 1 to rotate towards the switching-off direction through the transmission mechanism 3, when the switch is switched off, the one-way limiting structure of the transmission mechanism 3 is matched with the switching-off piece 24, the switching-off piece 24 enables the hasp locking structure formed by the tripping buckle 21 and the lock catch 22 to be unlocked, the contact mechanism 4 is switched off, and meanwhile, the handle 1 rotates towards the switching-off direction under the action of the connecting rod 23.

As shown in fig. 7, 8 and 10, the transmission mechanism 3 includes a worm, 1 or more transmission gears, an intermediate gear 32 engaged with the latch 22 of the operating mechanism 2, and a handle gear 31 engaged with the handle 1, the motor 93 is connected with the worm, and the worm, the plurality of transmission gears, the intermediate gear 32, and the handle gear 31 are sequentially engaged for transmission. In this embodiment, the three transmission gears of the transmission mechanism 3 are respectively a first transmission gear, a second transmission gear and a third transmission gear, and certainly, more or less transmission gears may be provided according to the requirement. The transmission mechanism 3 comprises a worm, a first transmission gear, a second transmission gear, a third transmission gear, an intermediate gear 32 and a handle gear 31, the motor 93 is meshed with the first transmission gear through the worm, the first transmission gear is meshed with the second transmission gear, the second transmission gear is meshed with the third transmission gear, the third transmission gear is meshed with the intermediate gear 32, the intermediate gear 32 is meshed with the handle gear 31, the handle gear 31 and the handle 1 are installed on the same connecting shaft, and the third transmission gear and a support of the operating mechanism 2 are installed on the same shaft in the shell.

The specific structure of the contact mechanism 4 for realizing switching on and off is shown in fig. 1, 2 and 4, the contact mechanism 4 comprises a moving contact 41 and a static contact 42 which are arranged oppositely, the moving contact 41 and a support of the operating mechanism 2 are coaxially arranged in a shell of the circuit breaker, a moving contact matched with the static contact 42 is arranged on the moving contact 41, and the moving contact 41 is matched with an energy storage mechanism on the support in the rotating process, and the energy storage mechanism provides elastic driving force and overtravel for the moving contact 41; the fixed contact 42 is fixed to one side of the arc extinguishing system 7 and the short-circuit protection mechanism 6, the fixed contact 42 is fixed to the housing through an avoiding groove 521 of the partition plate 5 (see fig. 18 for an avoiding groove), the fixed contact 42 includes a fixed contact plate and a fixed contact arranged on the fixed contact plate, the fixed contact plate is located on one side of a matching space 522 of the second partition part 52 of the partition plate 5, the fixed contact is opposite to a movable contact of the movable contact 41, and the movable contact 41 swings in the matching space 522 to realize switching on and off with the fixed contact 42.

The overload protection mechanism comprises a current transformer 94, the current transformer 94 is arranged between the outgoing line terminal 92 and the electromagnetic release, the current transformer 94 is connected with a control circuit of the electronic circuit board 8, the current transformer 94 collects current signals, and after the control circuit of the electronic circuit board 8 judges that overload occurs, the control circuit of the electronic circuit board 8 drives a motor 93 to rotate reversely to trigger the operating mechanism 2 to trip so as to enable the breaker to be opened.

In the process of realizing the automatic opening and closing of the circuit breaker, the circuit breaker has the improvement point that a position identification mechanism is arranged. As shown in fig. 3, 6, 8, and 14-17, the handle gear 31 is stacked above the electronic circuit board 8, a position recognition mechanism for recognizing the position of the handle gear 31 is disposed between the handle gear 31 and the electronic circuit board 8, the position recognition mechanism includes a recognition point 312 and a positioning point respectively disposed on the handle gear 31 and the electronic circuit board 8, and when the recognition point 312 is matched with the positioning point, the electronic circuit board 8 controls the motor 93 to rotate and stop according to the position of the handle gear 31.

As shown in fig. 14, the positioning point is arranged on the electronic circuit board 8 opposite to the handle gear 31, the positioning point includes a starting point position 81 formed by a conducting strip, a first end point position 82 corresponding to the closing position and a second end point position 83 corresponding to the opening position, the starting point position 81 is located between the first end point position 82 and the second end point position 83, as shown in fig. 15, an identification point 312 is arranged on one side of the handle gear 31 close to the electronic circuit board 8, preferably, the identification point 312 is arranged on one side of the handle gear 31 where no half-circle meshing gear teeth are arranged, a U-shaped conducting strip capable of forming a loop by connecting with the conducting strip on the electronic circuit board 8 is arranged on the identification point 312, and when the U-shaped conducting strip contacts with the conducting strip on the electronic circuit board 8 to form a loop, a signal of the position of the handle gear 31 at this time can be provided to the control circuit of the electronic circuit board 8, the control circuit of the electronic circuit board 8 controls the rotation of the motor 93 according to the position of the handle gear 31.

Specifically, as shown in fig. 3, 6, and 14, the conductive sheets include three short conductive sheets and one long conductive sheet 84, which are not in contact with each other, the three short conductive sheets are respectively and correspondingly disposed at a starting point position 81, a first end point position 82, and a second end point position 83, preferably, the starting point position 81, the first end point position 82, and the second end point position 83 are distributed at intervals along the circumference of the rotation of the handle gear 31, the interval between the first end point position 82 and the starting point position 81 is larger than the interval between the second end point position 83 and the starting point position 81, the long conductive sheet 84 is in the shape of an arc, and is disposed in parallel along the arc formed by the starting point position 81, the first end point position 82, and the second end point position 83, and the long conductive sheet 84 in the figure is disposed along the inner side of the three of the starting point position 81, the first end point position 82, and the second end point position 83, and obviously, may also be disposed along the outer sides of the three. The U-shaped conducting strip comprises two connecting arms, the middle parts of the two connecting arms are bent towards one side of the electronic circuit board 8 to form contact parts, one contact part of the U-shaped conducting strip is used for being in contact with the short conducting strip, the other contact part of the U-shaped conducting strip is in contact with the long conducting strip 84 and keeps in sliding contact with the long conducting strip 84 all the time in the rotation process of the handle gear 31, and when the two contact parts of the U-shaped conducting strip are in contact with the short conducting strip and the long conducting strip 84 simultaneously, the U-shaped conducting strip enables the short conducting strip to be communicated with the long conducting strip 84 and feeds back the position of the handle gear 31 to the electronic circuit board 8.

When the motor 93 rotates forward to rotate the handle gear 31, the U-shaped conducting strip of the identification point 312 conducts the short conducting strip and the long conducting strip 84 of the first end point position 82, the electronic circuit board 8 obtains that the handle gear 31 is located at the first end point position 82, the electronic circuit board 8 sends a reverse rotation control signal to the motor 93, the motor 93 reverses to rotate the handle gear 31 back to the starting point position 81 after receiving the reverse rotation control signal, and after the short conducting strip and the long conducting strip 84 of the starting point position 81 are simultaneously contacted with the U-shaped conducting strip of the handle gear 31, the motor 93 stops rotating; when the motor 93 rotates reversely to rotate the handle gear 31, the U-shaped conducting strip of the identification point 312 conducts the short conducting strip and the long conducting strip 84 at the second end point position 83, the electronic circuit board 8 obtains that the handle gear 31 is located at the second end point position 83, the electronic circuit board 8 sends a forward rotation control signal to the motor 93, the motor 93 receives the forward rotation control signal and then rotates the handle gear 31 back to the starting point position 81, and after the short conducting strip and the long conducting strip 84 at the starting point position 81 are contacted with the U-shaped conducting strip of the handle gear 31, the motor 93 stops rotating. Preferably, the first end position 82 is used as the on position, the second end position 83 is used as the off position, and when the handle gear 31 is at the second end position 83, the handle gear is normally immediately rotated back to the starting position 81, but when the switch is switched on and off due to load protection, in order to avoid the breaker being damaged by the large current due to overheating for a long time, the handle gear 31 can be set to stay at the second end position 83 for a little time, so as to provide a cooling time for the breaker.

Another positioning point structure (not shown in the figures) is provided, the conductive sheets forming the positioning points may include three pairs of short conductive sheets, each pair of short conductive sheets is respectively used as a starting point position 81, a first end point position 82 and a second end point position 83, the three pairs of short conductive sheets are arranged at intervals along the circumference of the rotation of the handle gear 31 so that the three pairs of short conductive sheets form a ring arrangement together, the U-shaped conductive sheets are the same as the above structure, in the rotation process of the handle gear 31, two contact portions of the U-shaped conductive sheets are respectively contacted with or separated from the pair of short conductive sheets at the same time, and when the U-shaped conductive sheets are contacted with the pair of short conductive sheets to form a loop, the position of the handle gear 31 can be fed back to the electronic circuit board 8.

As another improvement point, a partition plate 5 is further arranged in the casing, the partition plate 5 is arranged between the transmission mechanism 3 and the operating mechanism 2, the partition plate 5 can provide a mounting position for the transmission mechanism 3, the partition plate 5 is used for separating the operating mechanism 2, the contact mechanism 4, the transmission mechanism 3, the electronic circuit board 8 and the motor 93, the operating mechanism 2 and the contact mechanism 4 are located on one side of the surface of the partition plate 5, and the transmission mechanism 3, the electronic circuit board 8 and the motor 93 are located on one side of the back surface of the partition plate 5. As shown in fig. 18, the partition board 5 includes a first partition part 51 and a second partition part 52 which are integrally formed, the first partition part 51 is used for separating the operating mechanism 2 and the contact mechanism 4 from the transmission mechanism 3 and the electronic circuit board 8, so that the transmission mechanism 3 and the electronic circuit board 8 are located on the back side of the first partition part 51, and the operating mechanism 2 is located on the front side of the first partition part 51; the second separating part 52 is used for separating the motor 93 and the contact mechanism 4, the motor 93 and the electronic circuit board 8 are positioned on the back side of the second separating part 52, and the contact mechanism 4 is positioned on the surface side of the second separating part 52; the lower part of the first partition part 51 is connected with the upper part of the second partition part 52, one side of the first partition part 51 extends towards the handle 1 to form an extension part, the upper edge of the extension part is a downward-concave arc-shaped concave edge 511, the arc-shaped concave edge 511 is used for avoiding the lower part of the handle 1 and a second limiting part 321 on the intermediate gear 32, the second limiting part 321 can cross the arc-shaped concave edge 511 to be matched with the brake separating piece 24 on the operating mechanism 2, preferably, a mounting part 512 is arranged on one side of the arc-shaped concave edge 511 close to the shell, and the mounting part 512 is used for fixedly mounting the partition plate 5 in the shell; one side of installation department 512 is equipped with the spacing portion 513 of convex, spacing portion 513 is arranged in with the torsional spring cooperation in handle 1, takes place elastic deformation for the torsional spring at handle 1 rotation in-process and provides fixed spacing portion 513. It is preferable to be equipped with the arch that provides pivot 514 for minute floodgate piece 24 on first partition portion 51, protruding orientation deviates from the direction protrusion of electronic circuit board 8, intermediate gear 32 is located the both sides of baffle 5 respectively with pivot 514 this moment, arc concave edge 511 is as the communicating structure who communicates baffle 5 both sides, make spacing portion 321 of second can cooperate with minute floodgate piece 24 of operating device 2, the arch setting as pivot 514 is kept away from the one side of casing at arc concave edge 511, make installation department 512 and pivot 514 be located the both sides of arc concave edge 511 respectively, drive mechanism 3 sets up the middle part at first partition portion 51, and drive mechanism 3 and installation department 512, pivot 514 is located the both sides of first partition portion 51 respectively.

The second separating portion 52 is used for separating the arc extinguishing system 7 from the motor 93 and the electronic circuit board 8, an avoiding groove 521 is arranged on one side of the second separating portion 52 close to the arc extinguishing system 7, the avoiding groove 521 provides an installation site for the fixed contact 42 of the contact mechanism 4, the edge of one side of the second separating portion 52, which is far away from the arc extinguishing system 7, extends outwards to form a convex edge, the convex edge encloses the part of one side of the second separating portion 52 close to the arc extinguishing system 7 into a matching space 522, the movable contact 41 of the contact mechanism 4 penetrates through the first separating portion 51 and extends into the matching space 522, and the movable contact 41 swings in the matching space 522 and completes the action process of closing and opening with the fixed contact 42; an extension plate 524 is preferably arranged on a side of the second separating part 52 away from the arc extinguishing system 7, and the extension plate 524 is used for covering the outer side of the motor 93, so that the motor 93 and the electronic circuit board 8 are located on the back side of the separating plate 5 at the same time; a support portion 523 is disposed on a side of the second partition portion 52 opposite to the avoiding groove 521, preferably, the support portion 523 is a plate-shaped structure, the support portion 523 is located at an edge of the extending plate 524, a gap is left between the support portion 523 and the flange, preferably, a connection plate 73 connected between the arc guiding plate 72 and the wire inlet terminal 91 is disposed along a surface of the extending plate 524, one end of the connection plate 73 is connected with one end of the arc guiding plate 72 and simultaneously extends into the gap between the support portion 523 and the flange, the other end of the connection plate 73 is connected with the wire inlet terminal 91, and the connection plate 73 is electrically connected with the movable contact 41 through a flexible connection. As shown in fig. 2, the extension plate 524 is preferably located at an upper portion of the second partition 52 on a side away from the arc extinguishing system 7, the extension plate 524 is bent into a U-shaped structure, the U-shaped extension plate 524 is open toward the electronic circuit board 8, the support portion 523 opposite to the avoiding groove 521 is located at an edge of the U-shaped extension plate 524 on a side close to the flange, a gap for the connection plate 73 and the arc striking plate 72 to extend into is left between the support portion 523 and an inner side of the flange, an installation groove 525 for installing the connection plate 73 is provided on a surface of the extension plate 524, the connection plate 73 is connected with one end of the arc striking plate 72 and extends into the gap between the support portion 523 and the flange, the connection plate 73 is preferably electrically connected with the movable contact 41 through a flexible connection, and the arc striking plate 72 is disposed along the inner side of the flange of the second partition 52 and enables the other end of the arc striking plate 72 to extend into the arc extinguishing system 7.

The circuit breaker of this embodiment closes the floodgate mode and includes manual switching-on and automatic switching-on two kinds.

The manual closing mode is that the handle 12 of the manual operating handle 1 rotates in the closing direction, the handle 1 drives the operating mechanism 2 to drive the contact mechanism 4 to close through the connecting rod 23, and at the moment, the motor 93 and the transmission mechanism 3 do not act.

The automatic switch-on is as follows: before the circuit breaker does not receive a closing signal, when the handle gear 31 does not start to rotate, the identification point 312 of the handle gear 31 is matched with the starting point 81 of the electronic circuit board 8, the handle 1 and the handle gear 31 are located at initial positions, after the circuit breaker receives an automatic closing signal, the automatic closing signal can be controlled by a remote upper computer, can also be from equipment such as an electric energy meter and the like, or can be automatically controlled by a control circuit on the electronic circuit board 8 according to setting, the electronic circuit board 8 controls the motor 93 to rotate in the forward direction, the power of the motor 93 is transmitted to the handle 1 through the transmission mechanism 3, in the transmission process, the handle gear 31 and the handle 1 in the transmission mechanism 3 are arranged on the same connecting shaft, the handle 1 rotates in the closing direction under the limit matching of the first limit part 311 and the closing part 13, the closing direction in the figure is clockwise direction, and both the handle gear 31 and the handle 1 rotate clockwise, the handle 1 enables the operating mechanism 2 to drive the contact mechanism 4 to be switched on through the connecting rod 23, along with the rotation of the handle gear 31, the identification point 312 of the handle gear 31 is matched with the first end point position 82, at the moment, the switching-on action is completed, and the electronic circuit board 8 acquires the position of the handle gear 31 at the moment according to the matching of the identification point 312 of the handle gear 31 and the first end point position 82; when the handle gear 31 rotates to the first end position 82, the handle gear 31 drives the handle 1 to complete closing, the electronic circuit board 8 controls the motor 93 to rotate reversely, namely rotate counterclockwise, so that the limit matching of the first limit part 311 and the closing part 13 is released, the brake opening movement (automatic brake opening and manual brake opening) of the handle 1 is prevented from being interfered, at the moment, the position of the handle 1 is kept unchanged, the handle gear 31 rotates reversely, and when the identification point 312 of the handle gear 31 is matched with the starting point position 81, the motor 93 and the handle gear 31 stop rotating and return to the initial position.

The circuit breaker opening mode of this embodiment includes that manual separating brake, remote control separating brake, short circuit fault separating brake and overload fault separating brake are four kinds:

the manual brake-separating mode is that the handle 12 of the manual operating handle 1 rotates towards the brake-separating direction, the handle 1 drives the operating mechanism 2 through the connecting rod 23, the operating mechanism 2 drives the contact mechanism 4 to separate brake, and at the moment, the motor 93 and the transmission mechanism 3 do not act.

The open-circuit fault tripping is that after the coil 61 of the electromagnetic tripping device senses the short-circuit current, the lock 22 of the operating mechanism 2 is directly pushed to trigger tripping, so that the operating mechanism 2 drives the contact mechanism 4 to trip, at the moment, the handle 1 rotates to a tripping position under the action of the connecting rod 23, and at the moment, the motor 93 and the transmission mechanism 3 do not act.

Remote control separating brake and overload trouble separating brake all adopt the mode of automatic separating brake, and automatic separating brake is:

before the breaker does not receive the opening signal, the motor 93 and the transmission mechanism 3 do not rotate, at this time, the handle gear 31 which is installed on the same connecting shaft with the handle 1 does not rotate, the identification point 312 of the handle gear 31 is matched with the starting point 81 of the electronic circuit board 8, at this time, the handle gear 31 and the intermediate gear 32 are both located at the initial position, after the breaker receives the automatic opening signal, the electronic circuit board 8 controls the motor 93 to rotate reversely, the power of the motor 93 is transmitted to the handle gear 31 through the transmission mechanism 3, at this time, the handle gear 31 is not in limit matching with the handle 1, the handle 1 does not rotate, during the transmission process, the intermediate gear 32 of the transmission mechanism 3 rotates and enables the second limit part 321 arranged on the intermediate gear 32 to be matched with the opening part 24, at this time, the rotation direction of the intermediate gear 32 is shown as clockwise rotation in the figure, the handle gear 31 meshed with the intermediate gear 32 rotates anticlockwise, with the rotation of the intermediate gear 32, the opening member 24 rotates around the rotation fulcrum 514 to unlock the latch 22 and the jump latch 21 of the operating mechanism 2, and then the operating mechanism 2 rotates due to the loss of balance and drives the contact mechanism 4 to open, when the operating mechanism 2 rotates, the operating mechanism 2 does not have acting force on the connecting rod 23 any more, the handle 1 rotates under the action of the handle spring, the rotation of the handle gear 31 in the brake-separating process enables the identification point 312 to rotate from being matched with the starting point position 81 to being matched with the second end point position 83, the electronic circuit board 8 acquires the position of the handle gear 31 at the moment according to the matching of the identification point 312 of the handle gear 31 and the second end point position 83, the brake-separating operation is completed at the moment, the electronic circuit board 8 can control the motor 93 to rotate forwards to return to the initial position, but according to the actual use condition, the second end position 83 may be left for a period of time to allow the circuit breaker to cool before closing.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims

1. The utility model provides an automatic divide-shut brake circuit breaker which characterized in that: the electric arc extinguishing device comprises a shell and a handle (1) rotatably mounted on the shell, wherein an incoming line terminal (91) and an outgoing line terminal (92) are respectively arranged on two sides of the shell, and an operating mechanism (2), a contact mechanism (4), an arc extinguishing system (7), a short-circuit protection mechanism (6), a motor (93) and an electronic circuit board (8) are arranged between the incoming line terminal (91) and the outgoing line terminal (92); the handle (1) and the operating mechanism (2) are arranged on the upper portion of the shell, the handle (1) is connected with the operating mechanism (2), the contact mechanism (4) is located in the middle of the shell, a moving contact (41) of the contact mechanism (4) is connected with the operating mechanism (2), the motor (93) is located between the incoming line terminal (91) and the contact mechanism (4), a transmission mechanism (3) is arranged between the motor (93) and the handle (1), the motor (93) is controlled to rotate by a control circuit on the electronic circuit board (8), and the transmission mechanism (3) rotates under the driving of the motor (93) and is used for achieving automatic switching on and switching off of the circuit breaker; the arc extinguishing system (7) is arranged at the lower part of the shell, and the short-circuit protection mechanism (6) is arranged between the arc extinguishing system (7) and the handle (1); still be equipped with baffle (5) in the casing, on the circuit breaker thickness direction, operating device (2) and drive mechanism (3) set up the surperficial upside at electronic circuit board (8), just drive mechanism (3) are located between electronic circuit board (8) and operating device (2), baffle (5) set up between drive mechanism (3) and operating device (2), contact mechanism (4) are located surface one side of baffle (5), and drive mechanism (3), electronic circuit board (8) and motor (93) are located back one side of baffle (5).

2. The automatic opening and closing circuit breaker according to claim 1, characterized in that: the baffle (5) comprises a first separating part (51) and a second separating part (52) which are integrally formed, the lower part of the first separating part is connected with the upper part of the second separating part (52), the first separating part (51) is used for separating the operating mechanism (2) from the transmission mechanism (3) and the electronic circuit board (8), and the second separating part (52) is used for separating the motor (93) and the electronic circuit board (8) from the contact mechanism (4) and the arc extinguishing system (7).

3. The automatic opening and closing circuit breaker according to claim 2, characterized in that: an extension part is formed by extending one side of the first partition part (51) towards the handle (1), the upper edge of the extension part is a downward-concave arc-shaped concave edge (511), the arc-shaped concave edge (511) is used for avoiding the lower part of the handle (1), an installation part (512) is arranged on one side, close to the shell, of the arc-shaped concave edge (511), and the installation part (512) is used for fixedly installing the partition plate (5) in the shell; one side of installation department (512) is equipped with spacing portion of convex (513), spacing portion (513) be arranged in with handle (1) torsional spring cooperation, take place elastic deformation for the torsional spring at handle (1) rotation in-process and provide fixed spacing portion (513).

4. The automatic opening and closing circuit breaker according to claim 2, characterized in that: the edge of one side, far away from the arc extinguishing system (7), of the second partition part (52) extends outwards to form a convex edge, the convex edge enables the part, close to the arc extinguishing system (7), of the second partition part (52) to enclose a matching space (522), a moving contact (41) of the contact mechanism (4) penetrates through the first partition part (51) and extends into the matching space (522), and the moving contact (41) swings in the matching space (522) and completes the action processes of closing and opening with the fixed contact (42);

an extension plate (524) is arranged on one side, away from the arc extinguishing system (7), of the second partition part (52), and the extension plate (524) is used for wrapping the outer side of the motor (93), so that the motor (93) and the electronic circuit board (8) are located on one side of the back face of the partition plate (5) at the same time.

5. The automatic opening and closing circuit breaker according to claim 1, characterized in that: the arc extinguishing system (7) comprises an arc extinguishing chamber, and an arc striking plate (72) is arranged on one side of the arc extinguishing chamber close to the wire inlet terminal (91);

electronic circuit board (8) become the Z style of calligraphy, including last xarm circuit board, trailing arm circuit board and lower xarm circuit board, on circuit breaker width direction, trailing arm circuit board one side is the explosion chamber of short-circuit protection mechanism (6) and arc extinguishing system (7), and the opposite side is motor (93), and on the circuit breaker direction of height, lower xarm circuit board is located motor (93) below one side, and on circuit breaker thickness direction, run-on board (72), operating device (2) range upon range of on the trailing arm circuit board, and handle (1), operating device (2) and drive mechanism (3) range upon range of on the last xarm circuit board.

6. The automatic opening and closing circuit breaker according to claim 1, characterized in that: still be equipped with current detection mechanism in the casing, current detection mechanism sets up between short-circuit protection mechanism (6) and leading-out terminal (92), current detection mechanism includes current transformer (94), current transformer (94) set up between short-circuit protection mechanism (6) and leading-out terminal (92), and current transformer (94) are connected with the control circuit of electronic circuit board (8), and after the signal judgement that electronic circuit board (8) detected according to current transformer (94) appears transshipping, electronic circuit board (8) control motor (93) rotated and triggered operating device (2) and dropout messenger circuit breaker separating brake.

7. The automatic opening and closing circuit breaker according to claim 1, characterized in that: drive mechanism (3) include worm, a plurality of drive gear and with hasp (22) complex intermediate gear (32) of operating device (2) and with handle (1) complex handle gear (31), motor (93) are connected with the worm, a plurality of drive gear, intermediate gear (32), handle gear (31) mesh transmission in proper order, and handle gear (31) are installed on same connecting axle with handle (1), and control circuit driving motor (93) corotation of electronic circuit board (8), handle gear (31) through drive mechanism (3) drive handle (1) and rotate to the direction of closing a floodgate and realize closing a floodgate.

8. The automatic opening/closing circuit breaker according to claim 7, characterized in that: the middle gear (32) is provided with a second limiting part (321), the operating mechanism (2) comprises a support which is pivotally arranged in the shell, and a lock catch (22) and a trip catch (21) which are respectively pivotally arranged on the support, the lock catch (22) is in hasp fit with the trip catch (21), the trip catch (21) is provided with a connecting rod (23) which is used for being connected with the handle (1), a moving contact (41) of the contact mechanism (4) is connected with the support, the operating mechanism (2) is also provided with a brake separating piece (24), one end of the brake separating piece (24) is connected with the lock catch (22), the other end of the brake separating piece (24) is correspondingly arranged with the middle gear (32), the motor (93) reversely rotates under the control of the electronic circuit board (8) to drive the middle gear (32) to rotate, the second limiting part (321) of the middle gear (32) enables a hasp structure formed by the lock catch (22) and the trip catch (21) in the operating mechanism (2) to be unlocked through the brake separating piece (24), and then the circuit breaker is tripped to realize the opening of the circuit breaker.

9. The automatic opening/closing circuit breaker according to claim 7, characterized in that: a first limiting part (311) is arranged on one side, close to the handle (1), of the handle gear (31) in a protruding mode, and a closing part (13) matched with the first limiting part (311) is arranged on one side, close to the handle gear (31), of the handle (1) in a protruding mode; when the switch is switched on, the motor (93) rotates in the forward direction under the control of the electronic circuit board (8), and the first limiting part (311) is in limiting fit with the switch-on part (13) to enable the handle gear (31) to drive the handle (1) to rotate in the switch-on direction and drive the operating mechanism (2) to enable the contact mechanism (4) to be switched on.

10. The automatic opening and closing circuit breaker according to claim 9, characterized in that: a position identification mechanism for identifying the position of the handle gear (31) is arranged between the handle gear (31) and the electronic circuit board (8), the position identification mechanism comprises an identification point (312) and a positioning point which are respectively arranged on the handle gear (31) and the electronic circuit board (8), and when the identification point (312) is matched with the positioning point, the electronic circuit board (8) controls the motor (93) to rotate according to the position of the handle gear (31);

the positioning points are arranged on the electronic circuit board (8) opposite to the handle gear (31), the positioning points comprise a starting point position (81) formed by a conducting strip, a first end point position (82) corresponding to a switch-on position and a second end point position (83) corresponding to a switch-off position, the starting position (81) being located between a first end position (82) and a second end position (83), an identification point (312) is arranged on one side of the handle gear (31) close to the electronic circuit board (8), the identification point (312) is provided with a U-shaped conductive sheet which can be connected with a conductive sheet on the electronic circuit board (8) to form a loop, when the U-shaped conducting strip contacts with the conducting strip on the electronic circuit board (8) to form a loop, the position of the handle gear (31) at the moment can be provided for the electronic circuit board (8), and the electronic circuit board (8) controls the rotation of the motor (93) according to the position of the handle gear (31).