CN212783344U - Circuit breaker - Google Patents

Abstract

The utility model relates to the field of low-voltage electrical appliances, in particular to a circuit breaker, which comprises a shell, an electric device and an operating mechanism, wherein the electric device and the operating mechanism are respectively arranged in the shell; the electric device drives the linkage piece to rotate so that the gear set for switching on/off the circuit breaker comprises a plurality of gears, and each gear is a straight gear; the utility model discloses circuit breaker, its electric actuator compact structure, reliable operation.

Description

Circuit breaker

Technical Field

The utility model relates to a low-voltage apparatus field, concretely relates to circuit breaker.

Background

The circuit breaker is divided into a fixed type, a plug-in type and a drawer type according to the installation mode, and is an electrical switch which can realize manual operation and has the protection functions of automatic overload, short circuit, undervoltage and the like.

The existing circuit breaker mostly has the following problems:

1. the electric operation mechanism of the existing circuit breaker is realized by combining a worm gear, a helical gear and a straight gear, but the worm gear has low transmission efficiency, low reliability and large occupied space.

2. When the current conducting plate of its internal circuit is connected with binding post, adopt the current conducting plate and binding post's splint (including a plurality of fishback that set up side by side) welded mode of connection more, but because there is the difference of error, production technology in the circuit breaker design, there is inconsistency and erection equipment, lead to above-mentioned mode of connection to be unfavorable for the installation, use for the user and cause the puzzlement.

3. The existing circuit breaker has the advantages that the signal sampling device occupies a large space, the internal layout of the circuit breaker is not facilitated, and the design layout of the circuit breaker is disturbed.

Disclosure of Invention

An object of the utility model is to overcome prior art's defect, provide a circuit breaker, its electric actuator compact structure, reliable operation.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a circuit breaker comprises a shell 1a, an electric device 3 and an operating mechanism 2, wherein the electric device 3 and the operating mechanism 2 are respectively arranged in the shell 1a, the electric device 3 comprises a motor 31 and a gear set which are connected in a driving mode, and the operating mechanism 2 comprises a linkage piece 20 which is arranged on the shell 1a in a pivoting mode and is matched with the gear set in a driving mode; the electric device 3 drives the linkage part 20 to rotate so that the circuit breaker is switched on/off, and the gear set comprises a plurality of gears which are straight gears.

Preferably, the axes of the gears and the linkage 20 are parallel to each other, and the axial direction of the motor 31 is parallel to the axis of the linkage 20.

Preferably, the circuit breaker further comprises a button mechanism 1 in driving connection with the linkage member 20, and the button mechanism 1 drives the linkage member 20 to rotate so as to close/open the circuit breaker.

Preferably, the linkage 20 is driven to rotate clockwise/counterclockwise to close/open the circuit breaker.

Preferably, the electric device 3 further comprises a gear box 3-0 arranged in the housing 1a, the gear box 3-0 comprises a box body 30, the gear set further comprises a transmission gear set 32 in driving connection with a motor 31, and the motor 31 and the transmission gear set 32 are respectively arranged in the box body 30.

Preferably, the housing 30 includes a motor mounting cavity 303 and a gear mounting cavity 304 which are arranged side by side and communicate with each other, the motor 31 is limited in the motor mounting cavity 303, and the transmission gear set 32 is arranged in the gear mounting cavity 304.

Preferably, the housing 30 includes a power output aperture 305, and the transmission gear set 32 includes an output gear 320, wherein the output gear 320 passes through the power output aperture 305 to be in driving engagement with the linkage 20.

Preferably, the box body 30 comprises a matched box body base 302 and a box body cover 301, and a power output hole 305 of the box body 30 is arranged at the joint of the box body base 302 and the box body cover 301.

Preferably, the electric device 3 includes a driven gear 39 coaxially disposed with the linkage 20 and in driving fit with the output gear 320 of the electric device 3, the electric device 3 drives the linkage 20 to rotate clockwise through the driven gear 39 to close the circuit breaker, and the electric device 3 drives the linkage 20 to rotate counterclockwise through the button mechanism 1 to open the circuit breaker.

Preferably, the electric device 3 comprises a driving gear member 38 in driving engagement with the driven gear 39 and the button mechanism 1, respectively, and the driving gear member 38 is further in driving connection with the output gear 320 of the electric device 3.

Preferably, the button mechanism 1 comprises a button member 10, a first connecting rod 11, a transmission member 12 and a second connecting rod 13 which are connected in sequence, and the second connecting rod 13 is also in driving connection with a linkage member 20; the driving gear member 38 of the electric device 3 is in driving engagement with the transmission member 12.

Preferably, the circuit breaker further comprises a control circuit board 20a, wherein the control circuit board 20a and the gear box 3-0 are arranged in a stacked mode in the thickness direction of the circuit breaker; the lead of the motor 31 extends out of the gear box 3-0 and is plugged with a corresponding socket on the control circuit board 20a through a plug; alternatively, the plug of the motor 31 extends from the gear box 3-0 and is plugged into a corresponding socket on the control circuit board 20 a.

The utility model discloses a circuit breaker, its electric actuator 3 compares with the current electric actuator who adopts worm gear, helical gear, straight-teeth gear combination mode to realize, has improved electric actuator 3's reliability, has made electric actuator 3's structure compacter simultaneously, is favorable to practicing thrift shell 1 a's inner space, the assembly of being convenient for moreover. In addition, the gear box 3-0 integrates the motor 31 and the transmission gear set 32, which is beneficial to further improving the structural compactness of the electric device 3, and simplifies the internal structure of the shell 1a, thereby being more convenient for assembly.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the circuit breaker of the present invention, showing at least an electric device;

FIG. 2 is a schematic perspective view of the gear box of the present invention;

FIG. 3 is a schematic side view of a gear box according to the present invention;

fig. 4 is a schematic structural view of the first connection terminal of the present invention connected to a through-pole conductive plate;

fig. 5 is a schematic view of an assembly structure of the first connection terminal, the through-pole conductive plate, and the housing according to the present invention;

fig. 6 is a schematic structural diagram of a second embodiment of the circuit breaker of the present invention, showing at least a signal sampling device;

fig. 7 is a schematic structural diagram of a second embodiment of the circuit breaker of the present invention, with the housing removed;

fig. 8 is a schematic structural diagram of the signal sampling apparatus of the present invention;

fig. 9 is a schematic structural diagram of a first sampling device according to the present invention.

Detailed Description

The following description will further describe a specific embodiment of the circuit breaker according to the present invention with reference to the embodiments shown in fig. 1 to 9. The circuit breaker of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1, 6 and 7, the circuit breaker of the present invention, preferably a plug-in circuit breaker, includes a housing 1a, a button mechanism 1, and a direct pole circuit and at least one open pole circuit respectively disposed in the housing 1; the circuit of the breaker pole comprises an operating mechanism 2, a short-circuit protection mechanism 4, an overload protection mechanism 6, an arc extinguish chamber 5, a first connecting terminal 8 and a second connecting terminal 4 a; the button mechanism 1 is connected with the operating mechanism 2 in a driving mode, and the operating button mechanism 1 can enable the circuit breaker to be switched on/off through the operating mechanism 2. Specifically, the utility model discloses the circuit breaker is a double-phase circuit breaker, is equipped with a direct pole circuit and a broken pole circuit in the shell 1a, presses/draws button mechanism 1, makes circuit breaker combined floodgate/separating brake through operating device 2. Further, the breaker pole circuit is a circuit having an opening/closing function.

Preferably, as shown in fig. 1-3, the circuit breaker pole further comprises an electric device 3 disposed in the housing 1a, the electric device 3 comprises a motor 31 and a gear set which are connected in a driving manner, and the operating mechanism 2 comprises a linkage 20 which is pivotally disposed on the housing 1a and is in driving engagement with the gear set; the electric device 3 drives the linkage 20 to rotate to enable the circuit breaker to be switched on/off; the gear set comprises a plurality of gears, and each gear is a straight gear. The utility model discloses a circuit breaker, its electric actuator 3 compares with the current electric actuator who adopts worm gear, helical gear, straight-teeth gear combination mode to realize, has improved electric actuator 3's reliability, has made electric actuator 3's structure compacter simultaneously, is favorable to practicing thrift shell 1 a's inner space, the assembly of being convenient for moreover. Further, as shown in fig. 2 and 3, the electric device 3 further includes a gear box 3-0 disposed in the housing 1a, the gear box 3-0 includes a box 30, the gear set further includes a transmission gear set 32 drivingly connected to a motor 31, and the motor 31 and the transmission gear set 32 are respectively disposed in the box 30. Further, as shown in fig. 2, the housing 30 includes a motor mounting chamber 303 and a gear mounting chamber 304 which are arranged side by side and communicate with each other, the motor 31 is limited in the motor mounting chamber 303, and the transmission gear set 32 is arranged in the gear mounting chamber 304. Further, as shown in fig. 2, the housing 30 includes a power output hole 305, the transmission gear set 32 includes an output gear 320, and the output gear 320 passes through the power output hole 305 to be in driving engagement with the linkage 20. The gear box 3-0 integrates the motor 31 and the transmission gear set 32, which is beneficial to further improving the structural compactness of the electric device 3, and simplifies the internal structure of the shell 1a, thereby being more convenient for assembly.

It should be noted that the electric device 3 is not limited to be used in a plug-in circuit breaker, but may also be used in other types of circuit breakers, such as a molded case circuit breaker, and the electric device 3 is engaged with a handle drive, and thus, will not be enumerated and described in detail herein.

Preferably, as shown in fig. 4 and 5, the first terminal block 8 is of an integrated structure and includes a first connection portion 82, first clamping plates 80 and first terminal plates 81, the two first clamping plates 80 are oppositely disposed and respectively connected to two ends of the first connection portion 82, the first terminal plates 81 are connected to the first connection portion 82, and the first terminal plates 81 and the first clamping plates 80 extend in opposite directions; one end of the first wiring board 81 is the outer end of the wiring board connected with the first connecting portion 82, the other end of the first wiring board 81 is the wiring board connecting portion connected with the current conducting plate of the internal circuit of the plug-in circuit breaker, a connecting board bridge arm is arranged between the wiring board connecting portion and the outer end of the wiring board, the first wiring terminal 8 is provided with the first wiring board 81 specially used for connection, connection between the first wiring terminal 8 and the internal circuit of the plug-in circuit breaker is facilitated on one hand, and the connecting board bridge arm is arranged between the wiring board connecting portion and the outer end of the wiring board on the other hand, so that when a certain deviation exists in the position of the first wiring terminal 8, the first wiring terminal swings to a certain extent under the action.

Preferably, as shown in fig. 6-9, the circuit breaker of the present invention further includes a signal sampling device 2a, the signal sampling device 2a includes a control circuit board 20a and a first sampling device 21a and a second sampling device 22a connected to the control circuit board 20a respectively; the through pole circuit is a through circuit, and a breakpoint is not arranged in the middle of the through pole circuit; the circuit of the breaker pole also comprises a moving contact 70 and a fixed contact 71 which are matched; the first sampling device 21a is connected to a through pole circuit and the second sampling device 22a is connected to a broken pole circuit. The utility model discloses circuit breaker, its signal sampling device 2a, first sampling device 21a are used for detecting the system voltage state at circuit breaker place, and second sampling device 22a is used for monitoring circuit breaker combined floodgate/separating brake state, and the two all transmits to the circuit breaker outside through control scheme board 20a, and the sampling method is simple, signal sampling device 2a simple structure. Further, as shown in fig. 6 and 7, the through-electrode circuit includes a through-electrode conductive plate 9, and the first sampling device 21a is connected to the through-electrode conductive plate 9; the fixed contact 71 comprises a fixed contact 710 and a fixed contact arranged on the fixed contact 710, and the second sampling device 22a is connected with the fixed contact 710; further, as shown in fig. 6 and 7, the first sampling device 21a and the second sampling device 22a are plug-in type terminals, and the first sampling device 21a and the second sampling device 22a are respectively disposed on the control circuit board 20 and are respectively plug-in fitted with the through electrode conductive plate 9 and the fixed contact 710. The signal sampling device is simple in structure and convenient to assemble.

As shown in fig. 1-3, the present invention is an embodiment of a circuit breaker.

As shown in fig. 1, the circuit breaker of the present invention includes a housing 1a, a button mechanism 1, and a direct pole circuit and a breaker pole circuit respectively disposed in the housing 1a, wherein the direct pole circuit is used for connecting the N pole of the power supply, and the breaker pole circuit is used for connecting the L pole of the power supply; the circuit of the breaker pole comprises an electric device 3, an operating mechanism 2, a moving contact 70 and a static contact 71 which are used in a matching way; the operating mechanism 2 is in driving connection with the movable contact 70, the operating mechanism 2 comprises a linkage part 20 which is pivotally arranged on the shell 1a, the operating mechanism 1 is in driving connection with the linkage part 20, the electric device 3 is in driving fit with the linkage part 20, and both the operating mechanism 1 and the electric device 3 can drive the linkage part 20 to rotate so as to enable the circuit breaker to be switched on/off.

It should be pointed out, work as the utility model discloses the circuit breaker links to each other with DC power supply and makes, and direct utmost point circuit links to each other with DC power supply's negative pole, and open circuit utmost point circuit links to each other with DC power supply's positive pole.

It should be pointed out that, according to the actual requirement, as shown in fig. 1, the circuit breaker of the present invention further includes a short-circuit protection mechanism 4, an arc extinguish chamber 5 and an overload protection mechanism 6; the arc extinguishing chamber 5 is used for extinguishing electric arcs generated when the moving contact 70 and the static contact 71 are closed/disconnected; the short-circuit protection mechanism 4 and the overload protection mechanism 6 are respectively matched with the operating mechanism 2 in a driving mode, and when the breaker has a short-circuit fault or an overload fault, the short-circuit protection mechanism 4 or the overload protection mechanism 6 drives the operating mechanism 2 to act, so that the breaker is opened (or tripped).

Preferably, as shown in fig. 1, the circuit breaker of the present invention further includes a first connection terminal 8 and a second connection terminal 4 respectively disposed at both ends of the case 1a, the first connection terminal 8 includes a first through-pole terminal 8-0 and a first off-pole terminal 8-1 disposed side by side, the second connection terminal 4 includes a second through-pole terminal 40a and a second off-pole terminal 41a, the through-pole circuit includes a first through-pole terminal 8-0 and a second through-pole terminal 40a and is connected to an external circuit (i.e., a power source and a load) through the first through-pole terminal 8-0 and the second through-pole terminal 40a, respectively, the breaker pole circuit includes a first breaker pole terminal 8-1 and a second breaker pole terminal 41a and is connected to an external circuit through the first breaker pole terminal 8-1 and the second breaker pole terminal 41a, respectively. Specifically, as shown in fig. 1, the first through terminal 8-0 and the first breaker terminal 8-1 are disposed side by side at the lower end of the housing 1a, and the second through terminal 40a and the second breaker terminal 41a are disposed at the upper end of the housing 1a and located at the right side of the button mechanism 1.

Preferably, as shown in fig. 1, the link 20 is driven to rotate clockwise/counterclockwise to close/open the circuit breaker. Further, the electric device 3 drives the linkage 20 to rotate clockwise/counterclockwise, so as to close/open the circuit breaker; or, pressing/pulling the button mechanism 1 drives the linkage 20 to rotate clockwise/counterclockwise, so as to close/open the circuit breaker.

Preferably, as shown in fig. 1-3, the electric device 3 includes a motor 31 and a gear set in driving connection, the gear set further being in driving engagement with the linkage 20; the gear set comprises a plurality of gears, and each gear is a straight gear. Further, as shown in fig. 1 to 3, the axes of the gears and the linkage 20 are parallel to each other, and the axial direction of the motor 31 is parallel to the axis of the linkage 20 and perpendicular to the length direction of the circuit breaker.

Preferably, as shown in fig. 1-3, the electric device 3 further comprises a gear box 3-0 disposed in the housing 1a, the gear box 3-0 comprises a box body 30, the gear set further comprises a transmission gear set 32 in driving connection with a motor 31, and the motor 31 and the transmission gear set 32 are respectively disposed in the box body 30. Further, as shown in fig. 2, the housing 30 includes a motor mounting cavity 303 and a gear mounting cavity 304 which are arranged side by side and communicate with each other, the motor 31 is limited in the motor mounting cavity 303, and the transmission gear set 32 is arranged in the gear mounting cavity.

Preferably, as shown in fig. 2 and 3, the housing 30 includes a power take-off 305, and the transmission gear set 32 includes an output gear 320, wherein the output gear 320 is in driving engagement with the linkage 20 through the power take-off 305. Further, as shown in fig. 2 and 3, the case 30 includes a case base 302 and a case cover 301 that are fitted, and a power take-off hole 305 is provided at a junction of the case base 302 and the case cover 301.

Preferably, as shown in fig. 1, the electric device 3 further includes a driving gear element 38 and a driven gear element 39, the driving gear element 38 is pivotally disposed on the housing 1a and is drivingly connected with (meshed with) the output gear 320, the driven gear element 39 is coaxially disposed with the linkage element 20, and the driving gear element 38 is drivingly engaged with the button mechanism 1 and the driven gear element 39 respectively; the motor 31 of the electric device 3 drives the linkage 20 to rotate clockwise through the transmission gear set, the driving gear piece 38 and the driven gear 39, so that the circuit breaker is switched on; the motor 31 of the electric device 3 drives the linkage 20 to rotate anticlockwise through the transmission gear set, the driving gear piece 38 and the button mechanism 1, so that the circuit breaker is switched off. Specifically, as shown in fig. 1, the driven gear 39 is a sector gear, the driving gear member 38 includes a first driving gear 381 and a second driving gear 382, the first driving gear 381 is a sector gear, and at this time, the circuit breaker is opened, and the first sector gear 381 is not meshed with the driven gear 39; when the circuit breaker is switched on, the first driving gear 381 rotates to be meshed with the driven gear 39 and then continues to drive the linkage 20 to rotate clockwise through the driven gear 39, so that the circuit breaker is switched on, and the first driving gear 381 continues to rotate to be disengaged from the driven gear 39; the utility model discloses during the circuit breaker separating brake, second drive gear 382 drive button mechanism 1 action, button mechanism 1 drive linkage 20 anticlockwise rotation makes the circuit breaker separating brake. It should be noted that the implementation manner of the electric device 3 driving the circuit breaker to close/open is not limited to the above one, for example, a rack may be further provided to be in driving cooperation with the button mechanism 1, and the electric device 3 drives the button mechanism 1 to slide back and forth through the rack, so as to close/open the circuit breaker.

Preferably, as shown in fig. 1, the circuit breaker of the present invention further includes a control circuit board 20a (not shown in the figure), the control circuit board 2a is connected to the motor 31 through a wire, and the control circuit board 20a and the gear box 3-0 are stacked in the thickness direction of the circuit breaker. Preferably, the lead of the motor 31 extends out of the gear box 3-0 and is plugged with a corresponding socket on the control circuit board 20a through a plug (not shown in the figure), so that the assembly and the installation are convenient; alternatively, the plug of the motor 31 extends from the gear box 3-0 and is plugged into a corresponding socket on the control circuit board 20 a.

Preferably, as shown in fig. 1, the button mechanism 1 includes a button member 10, a first link 11, a transmission member 12 and a second link 13 connected in sequence, and the second link 13 is further in driving connection with a linkage member 20; the second driving gear 382 of the driving gear element 38 of the electric device 3 is in driving fit with the transmission element 12, so as to drive the linkage element 20 to rotate counterclockwise, so that the circuit breaker is opened. The button mechanism 1 is designed to be an assembly of a plurality of parts, so that the production difficulty of the button mechanism 1 is reduced, and the button mechanism 1 is convenient to assemble into the shell 1 a; third, according to actual demand circuit breaker can set up locking device (under the circuit breaker state of closing, button 10 and the spacing cooperation of locking device make locking device keep with the spacing cooperation of casing of circuit breaker assembly position, prevent that the circuit breaker from being taken out under the state of closing, guarantee user's power consumption security and continuation), button mechanism 1 designs for including button 10 and driving medium 12 then be convenient for button mechanism 1 simultaneously with the not co-operating of isostructure cooperation.

Preferably, as illustrated in fig. 1, is an embodiment of the operating mechanism 2: the operating mechanism 2 comprises a linkage piece 20, a third connecting rod 21, a rotating plate 24, a lock catch piece 22 and a trip catch piece 23, the linkage piece 20 and the rotating plate 24 are respectively and rotatably arranged on the shell 1a, the lock catch piece 22 and the trip catch piece 23 are respectively and pivotally arranged on the rotating plate 24 and matched in a lock catch manner, and the linkage piece 20 is adjacent to the lock catch piece 22 in a driving manner through the third connecting rod 21.

As shown in fig. 6-9, a second embodiment of the circuit breaker of the present invention is shown.

As shown in fig. 6 and 7, the circuit breaker of the present invention further includes a signal sampling device 2a, the signal sampling device 2a includes a control circuit board 20a and a first sampling device 21a and a second sampling device 22a connected to the control circuit board 20a respectively; the through pole circuit is a through circuit; the first sampling device 21a is connected with the through pole circuit to monitor the system voltage state of the breaker, and the second sampling device 22a is connected with the breaker pole circuit to monitor the closing/opening state of the breaker. Further, the second sampling device 22a is connected to the output terminal of the open pole circuit (i.e., the terminal connected to the load, which may be either of the first open pole terminal 8-1 and the second open pole terminal 41 a).

Preferably, as shown in fig. 6 and 7, the through-electrode circuit includes a through-electrode conductive plate 9, and the first sampling device 21a is connected to the through-electrode conductive plate 9; the fixed contact 71 includes a fixed contact plate 710 and a fixed contact disposed on the fixed contact 710, and the second sampling device 22a is connected to the fixed contact plate 710.

Preferably, as shown in fig. 6 and 7, the operating mechanism 2 and the overload protection mechanism 6 are arranged in the middle of the housing 1a side by side, the button mechanism 1 is arranged at one end of the housing 1a and is located at one side of the operating mechanism 2, and the arc extinguishing chamber 5 and the short-circuit protection mechanism 4 are arranged in side by side and is located at the other side of the operating mechanism 2; the control circuit board 20a, the short-circuit protection mechanism 4 and the arc-extinguishing chamber 5 are stacked in the thickness direction of the shell 1a, and the short-circuit protection mechanism 4 and the arc-extinguishing chamber 5 are located on one side of the control circuit board 20 a. Further, as shown in fig. 6 and 7, the arc-extinguishing chamber 5 and the short-circuit protection mechanism 4 are located between the operating mechanism 2 and the first connection terminal 8, the second connection terminal 4a and the operating mechanism 1 are located on the same side of the housing 1a, and the second connection terminal 4a is disposed on the operating mechanism 1 side. Specifically, as shown in fig. 6, the upper, lower, left, right sides and the reader-facing side of fig. 6 are taken as the upper, lower, left, right sides and front side of the circuit breaker; the overload protection mechanism 6 and the operating mechanism 2 are arranged in the middle of the shell 1a in a left-right side-by-side mode, the button mechanism 1 is arranged at the upper end of the shell 1a and is positioned above the operating mechanism 2, and the arc extinguish chamber 5 and the short-circuit protection mechanism 4 are arranged in a left-right side-by-side mode and is positioned below the operating mechanism 2; the control circuit board 20a is arranged at the rear side of the arc extinguish chamber 5 and the short-circuit protection mechanism 4; second binding post 4a and first binding post 8 set up respectively at the upper and lower both ends of shell 1a, and explosion chamber 5 and short-circuit protection mechanism 4 are located between first binding post 8 and operating device 2, and second binding post 4 sets up the left side at button mechanism 1.

Preferably, as shown in fig. 6 and 7, both ends of the through-pole conductive plate 9 of the through-pole circuit are respectively connected with the first through-pole terminal 8-0 and the second through-pole terminal 40 a; the moving contact 70, the short-circuit protection mechanism 4 and the first breaker terminal 8-1 are sequentially connected in series, and the fixed contact 71, the overload protection mechanism 6 and the second breaker terminal 41a are sequentially connected in series. Further, as shown in fig. 7, the breaker pole circuit further includes a contact plate 5a as a current carrying conductor connected in series between the second breaker pole terminal 41a and the overload protection mechanism 6.

Preferably, as shown in fig. 8 and 9, an embodiment of the signal sampling device 2a specifically includes: the first sampling device 21a and the second sampling device 22a are plug-in type terminals, and the first sampling device 21a and the second sampling device 22a are respectively arranged on the control circuit board 20a and are respectively in plug-in fit with the through electrode conductive plate 9 and the static contact plate 710. Further, as shown in fig. 8 and 9, the first sampling device 21a and the second sampling device 22a have the same structure, and each of the first sampling device and the second sampling device includes a second connecting portion 210 having a U-shaped structure, two second clamping plates 212 arranged oppositely, and two second pins 213 arranged oppositely; two ends of the second connecting part 210 are respectively connected with two second clamping plates 212, and the two second clamping plates 212 are both arc-shaped structures and are respectively bent in opposite directions, so that the whole structure is in an X-shaped structure; the second pins 213 are respectively connected to two edges of the middle portion of the second connecting portion 210, the second pins 213 and the second clamping plates 212 respectively extend in opposite directions, and each of the second pins 213 is located between two of the second clamping plates 212. Further, as shown in fig. 8, a second jack matched with the second pin 213 is disposed on the control circuit board 20a, two sets of second jacks are disposed on the control circuit board 20a, each set of second jacks includes two second jacks disposed side by side, one set is matched with the two second pins 213 of the first sampling device 21a, and the other set is matched with the two second pins 213 of the second sampling device 22 a.

Preferably, as shown in fig. 9, the first sampling device 21a and the second sampling device 22a are both one-piece members and are made of elastic metal materials.

Preferably, as shown in fig. 6 and 7, the circuit breaker of the present invention further includes a current sampling device 3a, and the current sampling device 3a includes a manganin shunt serially connected between the first breaker terminal 8-1 and the short-circuit protection mechanism 4, and the manganin shunt is further connected to the control circuit board 20 a.

As shown in fig. 4 and 5, a third embodiment of the circuit breaker of the present invention is provided.

In the circuit breaker of the embodiment, the first wiring terminal 8 is of an integrated structure, is formed by bending an elastic conductive sheet, and comprises a first connecting part 82, a first wire clamping part 80 and a first wiring board 81, wherein the two first wire clamping boards 81 are oppositely arranged and are respectively connected with two ends of the first connecting part 82, the first wiring board 81 is connected with the first connecting part 82, and the first wiring board 81 and the first wire clamping board 80 extend in opposite directions; the first terminal plate 81 has a terminal plate inner end connected to the first connection portion 82 at one end thereof and a terminal plate junction portion connected to a conductive plate of an internal circuit of the plug-in type circuit breaker at the other end thereof, and a terminal plate arm is provided between the terminal plate junction portion and the terminal plate inner end. Specifically, as shown in fig. 5, the upper end of the first terminal plate 81 is connected to the lower end of the through-pole conductive plate 9 and is a terminal plate joint, the lower end of the first terminal plate 81 is connected to the first connection plate 82 and is an outer end of the terminal plate, a terminal plate bridge arm is arranged between the terminal plate joint and the outer end of the terminal plate, that is, the through-pole conductive plate 9 is welded to only one part of the first terminal plate 81, the other part of the first terminal plate 81 becomes the terminal plate bridge arm and can swing, the first terminal plate 81 has a swing movement gap, and when the first terminal 8 is subjected to an external force, the first wire clamping portion 80 and the first connection portion 82 can swing around the first terminal plate 81. Further, as shown in fig. 7, the first terminal plate 81 of the first through terminal 8-0 is connected to the through-pole conductive plate 9, and the first terminal plate 81 of the first open-circuit terminal 8-1 is connected to the lower end of the manganin shunt.

Preferably, as shown in fig. 4, the first connecting portion 82 has a U-shaped structure to provide an elastic support, the first wiring board 81 is a rectangular plate cut from the middle of the first connecting portion 82 and having a swinging elasticity, and one end of the rectangular plate is connected to the connecting plate 82.

Preferably, as shown in fig. 4, the first wire clamping plate 80 is of an arc-shaped structure and comprises a plurality of comb plates arranged side by side, and the two first wire clamping plates 80 extend in opposite directions and are integrally of an X-shaped structure to form an elastic wire clamping structure convenient for plugging.

Preferably, the first terminal plate 81 is connected to the conductive plate by spot welding.

Preferably, as shown in fig. 5, the housing 1a includes a first assembly cavity for assembling the first terminal 8, one end of the first assembly cavity is provided with a wiring jack 11a, an external wire or bus bar penetrates through the wiring jack 11a and then is inserted between two first clamps 80 of the first terminal 8 to be clamped by the two first clamps 80, two ends of the inner side of the wiring jack 11a are respectively provided with a limiting protrusion, the two limiting protrusions are located between the two first clamps 80 and are respectively in limiting fit with the two first clamps 80, the other end of the first assembly cavity is provided with a limiting groove 10a, the joint of the first terminal plate 81 and the conductive plate is clamped in the limiting groove 10a, the width of the limiting groove 10a is greater than the thickness of the joint of the first terminal plate 81 and the conductive plate, make first binding post 8 have certain activity space, guarantee first wiring end 8 and external conductor or female the arranging and cooperate smoothly.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (12)

1. A circuit breaker comprises a shell (1a), an electric device (3) and an operating mechanism (2) which are respectively arranged in the shell (1a), wherein the electric device (3) comprises a motor (31) and a gear set which are connected in a driving mode, and the operating mechanism (2) comprises a linkage piece (20) which is arranged on the shell (1a) in a pivoting mode and is matched with the gear set in a driving mode; the electric device (3) drives the linkage piece (20) to rotate so as to enable the circuit breaker to be switched on/off; the method is characterized in that: the gear set comprises a plurality of gears, and each gear is a straight gear.

2. The circuit breaker of claim 1, wherein: the axes of the gears and the linkage piece (20) are parallel to each other, and the axial direction of the motor (31) is parallel to the axis of the linkage piece (20).

3. The circuit breaker of claim 1, wherein: the circuit breaker further comprises a button mechanism (1) connected with the linkage piece (20) in a driving mode, and the button mechanism (1) drives the linkage piece (20) to rotate so as to enable the circuit breaker to be switched on/off.

4. The circuit breaker according to any one of claims 1-3, wherein: the linkage piece (20) is driven to rotate clockwise/anticlockwise to enable the circuit breaker to be switched on/off.

5. The circuit breaker according to any one of claims 1-3, wherein: the electric device (3) further comprises a gear box (3-0) arranged in the shell (1a), the gear box (3-0) comprises a box body (30), the gear set further comprises a transmission gear set (32) connected with the motor (31) in a driving mode, and the motor (31) and the transmission gear set (32) are respectively arranged in the box body (30).

6. The circuit breaker of claim 5, wherein: the box body (30) comprises a motor assembly cavity (303) and a gear assembly cavity (304) which are arranged side by side and communicated with each other, the motor (31) is limited in the motor assembly cavity (303), and the transmission gear set (32) is arranged in the gear assembly cavity (304).

7. The circuit breaker of claim 5, wherein: the box body (30) comprises a power output hole (305), the transmission gear set (32) comprises an output gear (320), and the output gear (320) penetrates through the power output hole (305) to be in driving fit with the linkage piece (20).

8. The circuit breaker of claim 5, wherein: the box body (30) comprises a box body base (302) and a box body cover (301) which are matched, and a power output hole (305) of the box body (30) is formed in the connecting position of the box body base (302) and the box body cover (301).

9. The circuit breaker of claim 3, wherein: the electric device (3) comprises a driven gear (39) which is coaxially arranged with the linkage piece (20) and is in driving fit with an output gear (320) of the electric device (3), the electric device (3) drives the linkage piece (20) to rotate clockwise through the driven gear (39) so as to close the circuit breaker, and the electric device (3) drives the linkage piece (20) to rotate anticlockwise through the button mechanism (1) so as to open the circuit breaker.

10. The circuit breaker of claim 9, wherein: the electric device (3) comprises a driving gear piece (38) which is in driving fit with the driven gear (39) and the button mechanism (1) respectively, and the driving gear piece (38) is connected with an output gear (320) of the electric device (3) in a driving mode.

11. The circuit breaker according to claim 3 or 10, characterized in that: the button mechanism (1) comprises a button piece (10), a first connecting rod (11), a transmission piece (12) and a second connecting rod (13) which are sequentially connected, and the second connecting rod (13) is also in driving connection with a linkage piece (20); the driving gear piece (38) of the electric device (3) is in driving fit with the transmission piece (12).

12. The circuit breaker of claim 5, wherein: the circuit breaker further comprises a control circuit board (20a), wherein the control circuit board (20a) and the gear box (3-0) are stacked in the thickness direction of the circuit breaker; the lead of the motor (31) extends out of the gear box (3-0) and is plugged with a corresponding socket on the control circuit board (20a) through a plug; or the plug of the motor (31) extends out of the gear box (3-0) and is plugged with the corresponding socket on the control circuit board (20 a).

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