CN219106036U - Multipole circuit breaker - Google Patents

Abstract

The utility model provides a multipole circuit breaker, includes two at least circuit breaker poles that set up side by side along first direction, and every circuit breaker pole includes operating device, operating device is including rotating the support piece of assembly, rotates on the support piece and is equipped with snap-fit's jump knot and hasp, and the hasp of two adjacent circuit breaker poles is located the coplanar and links through the second driving medium linkage that sets up along first direction, makes the hasp of every circuit breaker pole can drive synchronous rotation by the second driving medium. According to the utility model, two adjacent breaker poles are transversely arranged side by side along the first direction, and the lock catches of the two adjacent operating mechanisms are in linkage connection through the second transmission piece arranged along the first direction, so that the tripping linkage between the breaker poles is realized, and the circuit breaker has the advantages of simple structure and high matching degree.

Description

Multipole circuit breaker

Technical Field

The utility model relates to the field of piezoelectric devices, in particular to a multipole circuit breaker.

Background

A circuit breaker is a switching device capable of closing, carrying and breaking a current under normal circuit conditions and closing, carrying and breaking a current under abnormal circuit conditions for a prescribed time. In the existing multipole circuit breaker, two adjacent circuit breaker poles are longitudinally arranged in a stacking mode, and tripping and opening linkage is achieved through synchronous tripping of levers of an operating mechanism.

However, with the diversity of the usage environments of the circuit breakers, a multipole circuit breaker is derived, and two adjacent circuit breaker poles are required to be arranged side by side along the transverse direction, so that the tripping linkage between the lock catches in the existing longitudinal stacking arrangement structure is not applicable to the structure any more, which brings challenges to the tripping linkage of the multipole circuit breaker.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide the multipole circuit breaker which has simple structure, high reliability and good switching-on and switching-off linkage effect.

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

the utility model provides a multipole circuit breaker, includes two at least circuit breaker poles that set up side by side along first direction, and every circuit breaker pole includes operating device, operating device is including rotating the support piece of assembly, rotates on the support piece and is equipped with snap-fit's jump knot and hasp, and the hasp of two adjacent circuit breaker poles is located the coplanar and links through the second driving medium linkage that sets up along first direction, makes the hasp of every circuit breaker pole can drive synchronous rotation by the second driving medium.

Further, the lock catch comprises a first linkage part and a second linkage part, the first end of the second transmission piece is in linkage connection with the first linkage part of one lock catch, and the second end of the second transmission piece is in sliding fit with the second linkage part of the adjacent lock catch in the first direction.

Further, the first linkage part is a round hole, the first linkage part is connected with the first end of the second transmission part, the second linkage part is an arc-shaped groove, and the second end of the adjacent second transmission part and the second linkage part are limited in a sliding mode.

Further, the length direction of the second transmission member, i.e., the first direction, is perpendicular to the rotation axis of the support member.

Further, the second transmission piece is in a rod-shaped structure, and two end parts of the second transmission piece are bent towards the same side and are respectively used for being in locking and inserting connection with two adjacent breaker poles.

Further, the circuit breaker pole further comprises a contact mechanism, the contact mechanism comprises a moving contact and a fixed contact which are matched with each other, the operating mechanism further comprises an operating assembly which is assembled in a rotating mode, the operating assembly is connected with the supporting piece in a linkage mode through a connecting rod, and the moving contact is connected to the supporting piece in a rotating mode and is opposite to the fixed contact.

Further, the circuit breaker pole further comprises a short-circuit protection mechanism and an overload protection mechanism, wherein the short-circuit protection mechanism and the overload protection mechanism are respectively matched with the lock catch and used for driving the lock catch to be in snap fit with the jump buckle.

Further, the hasp includes the hasp body, the middle part of hasp body is equipped with the pilot hole that is used for rotating the assembly, and the lateral wall of hasp body is protruding to form first cooperation portion, second cooperation portion and third cooperation portion along the radial of pilot hole respectively to three direction, first cooperation portion is located between second cooperation portion and the third cooperation portion, the hasp groove has been seted up to one side of first cooperation portion towards second cooperation portion for with jump knot snap fit, the lateral wall that the second cooperation portion faced first cooperation portion is used for cooperating with the short-circuit protection mechanism that sets up in the circuit breaker extremely as the fitting surface, and third cooperation portion is used for cooperating with overload protection mechanism, has seted up arc wall and round hole at third cooperation portion, arc wall is located one side that the pilot hole was kept away from to the arc wall as first linkage portion with the assembly Kong Gongyuan heart, the arc wall.

Further, an electrical operating mechanism is disposed in at least one of the circuit breaker poles, and the electrical operating mechanism is connected with the operating mechanism in a linkage manner.

Further, the electric operating mechanism comprises a motor and a rotating gear set driven by the motor, the operating mechanism further comprises an operating component, the operating component is connected with the supporting piece in a linkage mode, the operating component comprises a handle gear, and the handle gear is connected with the gear set in a meshed mode.

Further, the circuit breaker pole comprises a housing, the housing comprises a pair of end walls, a pair of side walls and a pair of connecting walls, wherein the pair of side walls are connected between the pair of end walls and are oppositely arranged, and the pair of connecting walls are respectively connected with the pair of end walls and the pair of side walls to form a cuboid housing; a pair of wiring ports are formed in the end wall of one end of the shell, wiring terminals are matched and assembled in the wiring ports, one end of the circuit breaker pole forms a wiring terminal, the rotating axial direction of the supporting piece is perpendicular to the connecting wall, and the side walls of two adjacent shells are adjacent; the connecting line between the pair of side walls is in a first direction, the connecting line between the pair of end walls is in a second direction, the connecting line between the pair of connecting walls is in a third direction, and the first direction, the second direction and the third direction are mutually perpendicular.

According to the multipole circuit breaker, two adjacent circuit breaker poles are transversely arranged side by side along the first direction, the lock catches of the two adjacent operating mechanisms are in linkage connection through the second transmission piece arranged along the first direction, tripping linkage between the circuit breaker poles is achieved, and the multipole circuit breaker has the advantages of being simple in structure and high in matching degree, and is suitable for the multipole circuit breaker which is transversely arranged side by side.

In addition, the first linkage part of the lock catch is a round hole, the second linkage part is an arc groove, the arc groove provides a matching allowance for the second transmission part, and mutual influence among all operating mechanisms caused by dimensional tolerance or part matching when a plurality of circuit breakers are simultaneously switched on is avoided.

In addition, the multipole circuit breaker is also provided with a short-circuit protection mechanism and an overload protection mechanism which are respectively matched with the lock catches, so that the circuit breaker has the functions of short-circuit and overload protection, and the use safety is improved.

Drawings

FIG. 1 is a schematic view of the structure of a circuit breaker pole (including an electrical actuator) of the present utility model;

fig. 2 is a schematic structural view of a multipole circuit breaker according to the present utility model;

FIG. 3 is a schematic diagram of the linkage engagement of a second transmission member according to the present utility model;

FIG. 4 is a schematic diagram of a second driving member according to the present utility model;

fig. 5 is a schematic structural view of the latch according to the present utility model.

Detailed Description

Embodiments of the multipole circuit breaker of the present utility model are further described below with reference to the examples given in connection with fig. 1-5. The multipole circuit breaker of the present utility model is not limited to the description of the following embodiments.

The multipole circuit breaker comprises at least two circuit breaker poles 1, wherein each circuit breaker pole 1 comprises a pair of wiring terminals 9, an operating mechanism 2, a contact system and an arc extinguishing system 5, the wiring terminals 9 are used for being connected with external conductive pieces, the contact mechanism comprises a moving contact 41 and a fixed contact 42 which are matched with each other, the moving contact 41 and the fixed contact 42 are respectively and electrically connected with the pair of wiring terminals 9, the fixed contact 42 is fixedly arranged, the moving contact 41 is connected with the operating mechanism 2 in a linkage way and is opposite to the fixed contact 42, the operating mechanism 2 drives the moving contact 41 to contact with or separate from the fixed contact 42, so that the switching-on and switching-off of the circuit breaker pole 1 are realized, the arc extinguishing system 5 is matched with one side of the contact mechanism, and an arc generated by the breaking of the contact mechanism is matched with the arc extinguishing system 5; furthermore, each breaker pole 1 may further be provided with a protection mechanism, where the protection mechanism is cooperatively disposed on one side of the operating mechanism 2, and the protection mechanism includes a short-circuit protection mechanism 6 and/or an overload protection mechanism 7, and when a short-circuit or overload fault occurs, the short-circuit protection mechanism 6 or the overload protection mechanism 7 triggers the operating mechanism 2 to trip, so as to implement short-circuit or overload protection.

In the multipole circuit breaker, the operating mechanism 2 and the moving contact 41 of two adjacent circuit breaker poles 1 are connected in a linkage way, so that synchronous opening and closing of each circuit breaker pole 1 in the circuit breaker are realized, at least one circuit breaker pole 1 is provided with an electric operating mechanism 3, the electric operating mechanism 3 is connected with the operating mechanism 2 of the same circuit breaker pole 1 in a linkage way, and after receiving an opening or closing command, the electric operating mechanism 3 drives the operating mechanism 2 of the same circuit breaker pole 1 to act, so that automatic opening and closing of the circuit breaker are realized, and a handle or a button connected with the operating mechanism 2 and serving as a manual operating member can be omitted, so that the operating convenience and safety of the circuit breaker are improved. Of course, as other embodiments, a handle or a button may be provided, and the operating mechanism may be driven by manually operating the handle or the button to realize opening and closing.

As shown in fig. 1 to 4, in this embodiment, at least two breaker poles 1 are arranged side by side along the first direction, that is, the width direction of the breaker poles 1 is the left-right direction in fig. 2, which may also be referred to as lateral side by side, at this time, the parts in the adjacent two breaker poles 1 are located on the same plane, that is, the operating mechanisms 2 of the adjacent two breaker poles 1 are assembled on the same plane, and similarly, the adjacent contact mechanisms, the arc extinguishing system and the protection system are all assembled on the same plane; the length direction of each breaker pole 1 is taken as a second direction, namely an up-down direction in fig. 2, and the thickness direction of each breaker pole 1 is taken as a third direction, namely a direction vertical to the paper surface in fig. 2, wherein the first direction, the second direction and the third direction are respectively vertical to each other.

The improvement point of the application is that the multipole circuit breaker comprises a transmission mechanism arranged along a first direction, and the transmission mechanism is connected between the operating mechanisms 2 of the adjacent two circuit breaker poles 1 along the first direction in a linkage way, so that the operating mechanisms 2 of the plurality of circuit breaker poles 1 realize synchronous actions.

The transmission mechanism comprises a second transmission member 82, the operating mechanism 2 comprises an operating assembly 21 assembled in a rotating way, the length direction of the second transmission member 82 is a first direction, the rotating axial direction of the operating assembly 21 is perpendicular to the first direction, and the second transmission member 82 is preferably connected with the operating assembly 21 in a linkage way.

As shown in fig. 1-5, the operating mechanism 2 of each circuit breaker pole 1 comprises an operating component 21 and a supporting member 22 which are assembled in a rotating way respectively, wherein the operating component 21 and the supporting member 22 are connected in a linkage way through a connecting rod 25, the operating component 21 comprises a rotating member and a transmission gear 211 which are assembled coaxially, the rotating member and the supporting member 22 are connected in a linkage way through the connecting rod 25, a jump button 24 and a lock catch 23 are assembled on the supporting member 22 in a rotating way, and one end of the jump button 24 is in snap fit with a first matching part 231 of the lock catch 23; the transmission mechanism comprises a second transmission member 82, the second transmission member 82 is connected between two adjacent catches 23 in a linkage way, when the breaker pole 1 is tripped, all catches 23 are synchronously driven to rotate under the linkage action of the second transmission member 82, so that the tripping synchronous action of a plurality of breaker poles 1 is realized, and of course, when the tripping buckle 24 is in snap fit with the catches 23, the second transmission member 82 also moves along the first direction along with the opening and closing action of the operation mechanism 2. The rotation axis of the rotation member, the transmission gear 211 and the support member 22 is in the third direction, and the length direction of the second transmission member 82, that is, the moving direction is in the first direction, and is perpendicular to the rotation axis of the rotation member, the transmission gear 211 and the support member 22.

An electric operating mechanism 3 and a control circuit board are arranged in one of the circuit breaker poles 1, the second transmission piece 82 is matched with the control circuit board through the electric operating mechanism 3 to realize automatic switching on and off,

the electric operating mechanism 3 is connected with at least one operating mechanism 2 of the breaker pole 1 in a linkage way, preferably, the electric operating mechanism 3 is in driving connection with the operating assembly 21, a control circuit board is provided with a controller for controlling the electric operating mechanism 3, and the controller outputs a control signal to enable the electric operating mechanism 3 to perform switching-on or switching-off actions; the circuit breaker is also internally provided with a sampling module, and the sampling module feeds back the collected current, voltage and other data signals to the controller.

Referring to fig. 1 to 5, there is provided a specific structure of a breaker pole 1, as shown in fig. 1 to 4, the breaker pole 1 includes a housing, the housing includes a pair of end walls, a pair of side walls and a pair of connecting walls, wherein the pair of side walls are connected between the pair of end walls, and the pair of side walls are oppositely disposed, the pair of connecting walls are respectively connected with the pair of end walls and the pair of side walls to form a cuboid housing, a connecting line between the pair of side walls is in a first direction, a connecting line between the pair of end walls is in a second direction, a connecting line between the pair of connecting walls is in a third direction, and the first direction, the second direction and the third direction are mutually perpendicular. The side walls of the shells of the two adjacent circuit breakers 1 are adjacent, a pair of wiring ports are formed in the end wall of one end of the shell, wiring terminals 9 are matched and assembled in the wiring ports, one ends of the circuit breaker poles 1 form wiring terminals, and the direction from the wiring terminals to one ends of the circuit breaker poles 1 far away from the wiring terminals is a second direction. In this embodiment, the connection terminals 9 are in a plate-shaped structure, one end of the connection terminal 9 extends out of the housing, the other end extends along the inner edge of the side wall of the housing to the middle of the housing in the second direction, at this time, the connection direction between the pair of connection terminals 9 is the first direction, and of course, as other embodiments, the connection terminals 9 may also be connection terminals 9 with other structures, the connection terminals 9 include an inlet terminal and an outlet terminal, and the inlet terminal and the outlet terminal are disposed on the same side of the end arm, and of course, as other embodiments, the inlet terminal and the outlet terminal may also be disposed on different sides, and one end arm may be an inlet terminal, and the other end arm disposed opposite to the inlet terminal is an outlet terminal.

The operating mechanisms 2 are correspondingly arranged in the middle of the housing and correspondingly located between the pair of connecting terminals 9, in this embodiment, the operating mechanisms 2 are rotationally assembled on the connecting wall, the plane where the swing track of the moving contact 41 is located is parallel to the connecting wall, at this time, two adjacent operating mechanisms 2 are all assembled on the plane where the end wall is located, and the two adjacent operating mechanisms 2 are transversely arranged along the first direction, and the operating mechanisms 2 comprise operating assemblies 21 and supporting members 22 which are rotationally assembled respectively, wherein the operating assemblies 21 are located at positions close to the connecting terminals. The operation assembly 21 includes a handle gear 212, a rotating member and a transmission gear 211 which are coaxially assembled and linked, the rotation axis of the handle gear 212, the rotating member, the transmission gear 211, the supporting member 22 and the lock catch 23 is perpendicular to the connecting wall, preferably the handle gear 212, the rotating member and the transmission gear 211 are sequentially stacked in the third direction, the handle gear 212 and the transmission gear 211 are respectively and fixedly connected with the rotating member, of course, the transmission gear 211 and the rotating member can be in an integral structure, the handle gear 212, the rotating member and the transmission gear 211 are in an integral structure, the support member 22 is rotatably mounted on the connecting wall, the support member 22 is positioned at one side of the operation assembly 21 far away from the terminal, the movable contact 41 is opposite to the fixed contact 42, the movable contact 41 is connected to the support member 22, the jump button 24 is in snap fit with the lock catch 23 and respectively rotatably assembled on the support member 22, the adjacent two lock catches 23 are positioned on the same plane, the lock catch 23 is provided with a first linkage part 2331 and a first linkage part 2332, the second transmission member 82 is arranged along the first direction, the first end of the second transmission member 82 is connected with a first part 2331 of one lock catch 23, and the second end of the second transmission member 82 is in sliding fit with the second adjacent second end 23 of the second linkage part 2332.

In this embodiment, the multipole circuit breaker includes three circuit breaker poles 1 arranged side by side along a first direction, the second transmission member 82 is in a rod-shaped structure, the second transmission member 82 is arranged along the first direction and connected between the catches 23 of two adjacent circuit breaker poles 1, two ends of the second transmission member 82 are bent towards the same side and are respectively used for being in plug-in fit with the catches 23 of two adjacent circuit breaker poles 1, in this embodiment, the second transmission member 82 is connected at one side of the catches 23 away from the wiring terminal, as shown in fig. 2-4, the three catches 23 of the three circuit breaker poles 1 are in linkage connection through two second transmission members 82 arranged along the first linkage part 2331 of the catches 23, the second linkage part 2332 is an arc groove, the first linkage part 2331 and the second linkage part 2332 are all located at one side of the catches 23 away from the wiring terminal, the center of the arc groove is located at the rotation center of the catches 23, the first end of the second transmission member 82 is connected with the first part 2331 of one catch 23, and the second end of the second transmission member 82 is in linkage connection with the second linkage part 2332 arranged along the first direction, and the second linkage part 2332 is easy to provide error fit between the second linkage part 23 and the second linkage part 23 due to error tolerance, and error fit between all the second linkage part 2 can be avoided. Of course, as other degraded embodiments, the second linkage part 2332 may be a round hole instead of an arc-shaped slot, and no fit allowance is reserved.

When the circuit breaker pole 1 is further provided with the electric operating mechanism 3, preferably as shown in fig. 1 to 4, the electric operating mechanism 3 is arranged at a position of the casing close to the wiring terminal in a stacked manner and is located between the two wiring terminals 9, the electric operating mechanism 3 comprises a motor 31 and a gear set 32 driven to rotate by the motor 31, the gear set 32 comprises a plurality of gears in meshed connection, one of the gears is meshed with the handle gear 212 for driving the operating assembly 21 to rotate in a closing or opening direction, and the electric operating mechanism 3 is linked with the operating assembly 21. As shown in fig. 1-4, the electric actuator 3 is arranged in the breaker pole 1 in the intermediate position, but of course the electric actuator 3 may also be arranged in the other two breaker poles 1.

A control circuit board for controlling the electric operating mechanism 3 is arranged in one of the circuit breaker poles 1, and a controller of the control circuit board outputs a control signal to control the start and stop of the motor 31.

When the motor 31 rotates in the closing direction according to the received closing control signal, the gear set 32 is driven to rotate in the closing direction, the handle gear 212 meshed with the gear set 32 rotates in the closing direction, in fig. 2, the handle gear rotates clockwise, the whole operating assembly 21 located at the same breaker pole 1 with the electric operating mechanism 3 rotates clockwise, the supporting member 2 and the moving contact 41 rotate in the closing direction under the linkage action, and at the moment, the second transmission member 82 is driven to move along the first direction, so that the adjacent two breaker poles 1 are driven to realize synchronous closing.

When the motor 31 rotates in the opening direction according to the received opening control signal, the opening signal at this time may be a normal opening command, or may be an opening command output when it is determined that there is a short circuit or overload, the gear set 32 is driven to rotate in the opening direction, the handle gear 212 meshed with the gear set 32 rotates in the counterclockwise direction in fig. 3, the operating assembly 21 located in the same breaker pole 1 with the electric operating mechanism 3 integrally rotates in the counterclockwise direction, the supporting member 2 and the moving contact 41 rotate in the opening direction under the linkage action, at this time, the second transmission member 82 is driven to move along the first direction, so as to drive the adjacent two breaker poles 1 to realize synchronous opening.

An arc extinguishing system 5 is arranged at one end of the shell far away from the wiring end, the arc extinguishing system 5 is matched with the contact mechanism and used for extinguishing an arc generated by breaking of the contact mechanism, the arc extinguishing system 5 comprises an arc extinguishing chamber 51, an arc separating wall 52 and a pair of arc striking plates 53, wherein the fixed contact 42 and the arc extinguishing chamber 51 are arranged along a second direction, the arc extinguishing chamber 51 and the fixed contact 42 are arranged side by side along the second direction and are positioned at one side of the circuit breaker pole 1 opposite to the moving contact 41, the arc extinguishing chamber 51 is obliquely arranged, the arc entering end of the arc extinguishing chamber 51 is obliquely oriented to the moving contact 41, preferably, the included angle between the exhaust direction from the arc entering end to the exhaust end of the arc extinguishing chamber 51 and the first direction is smaller than 30 degrees, and the exhaust direction from the arc entering end to the exhaust end of the arc extinguishing chamber 51 is basically along the first direction and slightly obliquely close to be parallel to the first direction, so that the exhaust end faces the side wall of the circuit breaker pole 1 in the first direction, and safety is improved; the arc separation wall 52 is located between the contact mechanism and the arc entering end of the arc extinguishing chamber 51, and the arc separation wall 52 is stacked below the moving contact 41 in the third direction, a pair of arc striking plates 53 are respectively arranged along two sides of the arc separation wall 52 in an extending mode, one ends of the arc striking plates 53 are connected with the contact mechanism, that is, the pair of arc striking plates 53 are oppositely arranged at intervals, the moving contact 41 and the fixed contact 42 are located between the pair of arc striking plates 53 in a matched mode, and the other ends of the pair of arc striking plates 53 extend into the arc extinguishing chamber 51 and are used for introducing an arc into the arc extinguishing chamber 51.

Further, the control circuit board for controlling the start and stop of the motor 31 is preferably located in the same breaker pole 1 with the electric operating mechanism 3, of course, the control circuit board may also be located in a different breaker pole 1 with the electric operating mechanism 3, the control circuit board includes a controller, the controller outputs a signal according to a control command to control the motor 31, the control circuit board is preferably located in a position far away from the terminal in the housing, and the control circuit board is separated from the operating mechanism 2 and the arc extinguishing system 5 in the breaker pole 1 by a partition board, so as to prevent the control circuit board from being interfered.

In addition, a short-circuit protection mechanism 6 and an overload protection mechanism 7 are further arranged in each breaker pole 1, wherein the short-circuit protection mechanism 6 and the overload protection mechanism 7 are arranged at the side positions of the breaker pole 1, preferably as shown in fig. 1-4, the short-circuit protection mechanism 6, the overload protection mechanism 7 and the fixed contact 42 are positioned at the same side of the breaker pole 1 (a shell), wherein the short-circuit protection mechanism 6 is closer to a wiring terminal, one end of the short-circuit protection mechanism 6 is electrically connected with one wiring terminal 9, and the other end of the short-circuit protection mechanism 6 extends obliquely between the operation assembly 21 and the supporting piece 22 for being matched with the lock catch 23; one end of the overload protection mechanism 7 is opposite to the support 22 in the second direction, and the other end of the overload protection mechanism 7 is bent and extended in the first direction to a side of the support 22 opposite to the lock catch 23. One connection terminal, the short-circuit protection mechanism 6, the overload protection mechanism 7 and the stationary contact 42 are arranged in this order along the second direction.

The short-circuit protection mechanism 6 includes a yoke 61, an armature 62 and a reset member, the yoke 61 is electrically connected with one of the connection terminals 9, in this embodiment, one end of the connection terminal 9 connected with the yoke 61 extends from the connection port, the middle part of the connection terminal 9 is attached to the side of the housing and is arranged along the second direction, the other end extends obliquely to the direction of the supporting member 22, the yoke 61 is attached to the other end of the connection terminal 9, one end of the armature 62 is rotatably connected with the yoke 61, the other end of the armature 62 extends obliquely to the position between the supporting member 22 and the operation assembly 21 for being matched with the lock catch 23, one end of the elastic member is fixedly connected, and the other end is connected with the armature 62 for providing a reset force for the armature 62.

The overload protection mechanism 7 includes a fixing member 71 and a bimetal 72, wherein the fixing member 71 is correspondingly disposed at a side position of the housing along the second direction, one end of the bimetal 72 is connected with the fixing member 71, the other end of the bimetal 72 is bent along the first direction and extends to a side of the support 22 opposite to the lock catch 23, at this time, in the first direction, the overload protection mechanism 7, the short-circuit protection mechanism 6 and the operating mechanism 2 are sequentially disposed along the first direction, and the other end of the armature 62 and the other end of the bimetal 72 are respectively disposed at two sides of the lock catch 23, in this embodiment, a second mating portion 232 mated with the armature 62 of the short-circuit protection mechanism 6 is disposed at a side of the lock catch 23 facing the operating assembly 21, and a third mating portion 233 mated with the bimetal 72 of the overload protection mechanism 7 is disposed at a side of the lock catch 23 facing away from the operating assembly 21.

In combination with fig. 3-5, a latch 23 structure applied to this embodiment is provided, the latch 23 includes a latch body, an assembly hole 234 is provided in the middle of the latch body, the latch 23 is rotationally assembled in the supporting member 22 through the assembly hole 234, the side wall of the latch body protrudes in three directions along the radial direction of the assembly hole 234 to form a first mating portion 231, a second mating portion 232 and a third mating portion 233, the first mating portion 231 is located between the second mating portion 232 and the third mating portion 233, a snap-fit groove is formed on one side of the first mating portion 231 facing the second mating portion 232, the snap-fit groove forms a snap-fit with one end of the latch 24, the side wall of the second mating portion 232 faces the first mating portion 231 as a mating surface, the armature 62 of the short-circuit protection mechanism 6 is opposite to the mating surface, when a short-circuit fault occurs, the snap-fit surface is pushed by the armature 62 to enable the latch 23 to rotate, an arc groove and a round hole are formed in the third mating portion 233, the arc groove is formed as a second coupling portion 2332, wherein the arc groove is co-centered with the assembly hole 234, a snap-fit groove is formed on one side of the second mating portion 82 opposite to the arc groove, the other side wall of the arc groove is located on the outer side of the arc groove 82, and the other side of the arc groove is located on the side of the arc groove is opposite to the round hole 2, and the side of the arc-shaped 23 is opposite to the arc groove is 72, and the other side of the arc groove is 72 is in the sliding-shaped, and is in the opposite to the side of the arc groove is 72.

Specifically, the working principle of the three breaker poles 1 in fig. 1-4 in the case of short circuit and overload fault is described as an example, for convenience of description, the second transmission member 82 connected between the left breaker pole 1 and the middle breaker pole 1 is simply referred to as a left second transmission member, the second transmission member 82 connected between the middle breaker pole 1 and the right breaker pole 1 is simply referred to as a right second transmission member, and the latches 23 located in the three breaker poles 1 are sequentially simply referred to as a left latch, a middle latch and a right latch, and correspondingly, the latches 24 mated with the three latches 23 are respectively a left latch, a middle latch and a right latch.

Taking the example that the middle breaker pole 1 has a short circuit fault, the armature 62 of the middle breaker pole 1 pushes the middle lock catch to rotate, in fig. 3, the middle lock catch rotates anticlockwise, so that the middle lock catch and the snap fit of the middle lock catch are broken, meanwhile, the anticlockwise rotation of the middle lock catch drives the left second transmission piece to move along the first direction, the second end of the left second transmission piece slides in the second linkage part of the left lock catch and drives the left lock catch to rotate anticlockwise so as to enable the operating mechanism 2 of the left breaker pole to trip, the second end of the right second transmission piece slides in the second linkage part of the middle lock catch and then is driven to move along the first direction, so that the first end of the right transmission piece drives the right lock catch to rotate anticlockwise, and the right breaker pole 1 trips, and the above processes occur simultaneously, thereby realizing synchronous tripping of the three breaker poles 1; in the process of synchronous tripping of the three breaker poles 1, the support member 22 of each breaker pole 1 rotates in the opening direction, and under the linkage action, the operation assembly 21 also rotates in the opening direction.

Taking the overload fault of the breaker pole 1 located at the left side as an example, the bimetallic strip 72 of the breaker pole 1 at the left side pushes the left side lock catch to rotate (anticlockwise rotate), so that the snap fit formed by the left side lock catch and the left side jump catch is broken down, the rotation of the left side lock catch drives the left side second transmission piece to slide in the second linkage part first, then drives the left side second transmission piece to move along the first direction, the movement of the left side second transmission piece drives the middle lock catch to anticlockwise rotate and separate from the middle jump catch, the breaker pole 1 in the middle is tripped, and similarly, the rotation of the middle lock catch drives the right side second transmission piece to drive the right side lock catch and the right side jump catch to trip, so that the three breaker poles 1 are tripped synchronously.

It should be noted that, in the description of the present utility model, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings or an orientation or a positional relationship conventionally put in use, and are merely for convenience of description, and do not indicate that the apparatus or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating relative importance.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims (11)

1. Multipole circuit breaker, comprising at least two circuit breaker poles (1) arranged side by side in a first direction, each circuit breaker pole (1) comprising an operating mechanism (2), said operating mechanism (2) comprising a support (22) assembled in rotation, a snap-fit jump (24) and a lock catch (23) assembled in rotation on the support (22), characterized in that: the lock catches (23) of two adjacent breaker poles (1) are located on the same plane and are connected in a linkage manner through a second transmission piece (82) arranged along the first direction, so that the lock catches (23) of each breaker pole (1) can be driven to synchronously rotate by the second transmission piece (82).

2. The multipole circuit breaker according to claim 1, characterized in that: the lock catch (23) comprises a first linkage part (2331) and a second linkage part (2332), the first end of the second transmission piece (82) is connected with the first linkage part (2331) of one lock catch (23) in a linkage way, and the second end of the second transmission piece (82) is in sliding fit with the second linkage part (2332) of the adjacent lock catch (23) in the first direction.

3. The multipole circuit breaker according to claim 2, characterized in that: the first linkage part (2331) is a round hole, the first linkage part (2331) is connected with the first end of the second transmission piece (82), the second linkage part (2332) is an arc-shaped groove, and the second end of the adjacent second transmission piece (82) and the second linkage part (2332) slide and limit.

4. The multipole circuit breaker according to claim 1, characterized in that: the length direction of the second transmission member (82), i.e., the first direction, is perpendicular to the rotational axis of the support member (22).

5. The multipole circuit breaker according to claim 2, characterized in that: the second transmission piece (82) is of a rod-shaped structure, and two end parts of the second transmission piece (82) are bent towards the same side and are respectively used for being in plug-in fit with the lock catches (23) of two adjacent breaker poles (1).

6. The multipole circuit breaker according to claim 1, characterized in that: the circuit breaker pole (1) further comprises a contact mechanism, the contact mechanism comprises a moving contact (41) and a fixed contact (42) which are matched with each other, the operating mechanism (2) further comprises an operating assembly (21) assembled in a rotating mode, the operating assembly (21) is connected with a supporting piece (22) in a linkage mode through a connecting rod (25), and the moving contact (41) is connected with the supporting piece (22) in a rotating mode and is opposite to the fixed contact (42).

7. The multipole circuit breaker according to claim 1, characterized in that: the circuit breaker pole (1) further comprises a short-circuit protection mechanism (6) and an overload protection mechanism (7), wherein the short-circuit protection mechanism (6) and the overload protection mechanism (7) are respectively matched with the lock catch (23) and used for driving the lock catch (23) to be in release of snap fit with the jump buckle (24).

8. The multipole circuit breaker according to claim 1, characterized in that: the utility model provides a hasp, hasp (23) are including the hasp body, the middle part of hasp body is equipped with mounting hole (234) that are used for rotating the assembly, and the lateral wall of hasp body is protruding to form first mating portion (231), second mating portion (232) and third mating portion (233) along radial three direction of mounting hole (234) respectively, first mating portion (231) are located between second mating portion (232) and third mating portion (233), the hasp groove has been seted up towards one side of second mating portion (232) for with jump knot (24) snap fit, second mating portion (232) are used as the fitting surface to be used for with setting up short circuit protection mechanism (6) in circuit breaker utmost point (1) cooperation towards the lateral wall of first mating portion (231), and third mating portion (233) are used for with overload protection mechanism (7) cooperation, have seted up arc groove and round hole at third mating portion (233), arc groove is as second interlocking portion (232) and mounting hole (2332) round center, is located one side of keeping away from arc groove (234) as first interlocking portion (234).

9. The multipole circuit breaker according to claim 1, characterized in that: at least one of the circuit breaker poles (1) is internally provided with an electric operating mechanism (3), and the electric operating mechanism (3) is connected with the operating mechanism (2) in a linkage way.

10. The multipole circuit breaker of claim 9, wherein: the electric operating mechanism (3) comprises a motor (31) and a rotating gear set (32) driven by the motor (31), the operating mechanism (2) further comprises an operating component (21), the operating component (21) is connected with the supporting piece (22) in a linkage mode, the operating component (21) comprises a handle gear (212), and the handle gear (212) is meshed with the gear set (32).

11. The multipole circuit breaker according to claim 1, characterized in that: the circuit breaker pole (1) comprises a shell, wherein the shell comprises a pair of end walls, a pair of side walls and a pair of connecting walls, the pair of side walls are connected between the pair of end walls, the pair of side walls are oppositely arranged, and the pair of connecting walls are respectively connected with the pair of end walls and the pair of side walls to form a cuboid shell; a pair of wiring ports are formed in the end wall of one end of the shell, wiring terminals (9) are matched and assembled in the wiring ports, one end of the circuit breaker pole (1) forms a wiring terminal, the rotation axis of the supporting piece (22) is perpendicular to the connecting wall, and the side walls of two adjacent shells are adjacent; the connecting line between the pair of side walls is in a first direction, the connecting line between the pair of end walls is in a second direction, the connecting line between the pair of connecting walls is in a third direction, and the first direction, the second direction and the third direction are mutually perpendicular.

Images