CN111341612A

CN111341612A - Circuit breaker

Info

Publication number: CN111341612A
Application number: CN201911024772.8A
Authority: CN
Inventors: 刘瑾; 朱俊; 李罗斌; 吴正威
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2018-11-30
Filing date: 2019-10-25
Publication date: 2020-06-26
Also published as: CN211208374U

Abstract

The utility model provides a circuit breaker, includes the casing and sets up the circuit breaker looks utmost point and the earth leakage protection utmost point in the casing both sides side by side, its characterized in that: the leakage protection pole comprises a zero sequence current transformer, a leakage operation mechanism, a leakage test mechanism, a neutral pole static contact and a neutral pole moving contact which are oppositely arranged in a shell, a breaker phase pole comprises a phase pole operation mechanism, a static contact and a moving contact which are oppositely arranged, the moving contact is connected with the phase pole operation mechanism, a main loop of the breaker phase pole penetrates through the zero sequence current transformer, the test mechanism forms a test loop with double breakpoints through a first contact part and a second contact part on an elastic part, in addition, the first contact part is driven by a neutral driving part connected with the neutral pole moving contact to be in contact with the first contact part, the neutral driving part is connected with the phase pole operation mechanism or the leakage operation mechanism, the situation that a test button is pressed down when the breaker phase pole is opened can be ensured, the test loop is not switched on, and the reliability of the breaker is.

Description

Circuit breaker

Technical Field

The invention relates to the field of low-voltage electric appliances, in particular to a circuit breaker.

Background

Because the testing mechanism of the circuit breaker is limited by the space of the shell, the testing loop of the testing mechanism usually adopts a single-breakpoint structure, but when the circuit breaker is opened, if a testing button of the testing mechanism is pressed, the outgoing line end of the circuit breaker generates a voltage to earth due to the conduction of the testing loop, the risk of electric shock is caused in the using process, and the safety regulation of a specific region is not met, so that certain limitation exists, so that the testing loop of the testing mechanism is changed into a double-breakpoint structure by a part of the circuit breaker, one breakpoint in the double breakpoints is controlled by a handle, the testing loop is conducted only by pressing the testing button when the handle is closed, but the breakpoints are influenced by the closing and opening speeds of the handle, if the handle has the problem of slow reset, the breakpoints are slow to break, and at the same time, if the circuit breaker is reversely connected, the testing loop is slow to break by pressing, the coil of the circuit breaker is heated and burnt, and the reliability of the circuit breaker is seriously influenced due to the failure problem of the circuit breaker.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides the circuit breaker with simple structure and high reliability.

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

a circuit breaker comprises a shell, a circuit breaker phase pole and an electric leakage protection pole, wherein the circuit breaker phase pole and the electric leakage protection pole are arranged on two sides of the shell side by side, the electric leakage protection pole comprises a zero sequence current transformer, an electric leakage operating mechanism, an electric leakage testing mechanism, a neutral pole static contact and a neutral pole moving contact which are oppositely arranged in the shell, the circuit breaker phase pole comprises a phase pole operating mechanism, a static contact and a moving contact which are oppositely arranged, the moving contact is connected with the phase pole operating mechanism, and a main loop of the circuit breaker phase pole penetrates through the zero sequence current transformer;

the electric leakage testing mechanism comprises an elastic piece, a testing button, a first contact piece and a second contact piece, wherein the first contact piece and the second contact piece are respectively connected to two ends of the testing loop; the test button can push the second contact part to be in contact with the second contact piece, and the neutral line driving piece pushes the first contact part to be in contact with the first contact piece when the circuit breaker is switched on.

Preferably, the neutral line driving part comprises a protection driving rod and a shaft-machine coupling driving rod, one end of the protection driving rod is connected with the neutral pole moving contact, and the other end of the protection driving rod is hinged with the electric leakage operating mechanism through the shaft-machine coupling driving rod; the first contact part of the elastic element is matched with the shaft-machine coupling driving rod, the shaft-machine coupling driving rod pushes the first contact part to be in contact with the first contact element, the neutral pole moving contact is connected with one end of the return spring, and the other end of the return spring is connected with the shell.

Preferably, the neutral line driving part comprises a protection driving rod and a shaft-machine coupling driving rod, one end of the protection driving rod is connected with the neutral pole moving contact, and the other end of the protection driving rod is hinged with the phase pole operating mechanism through the shaft-machine coupling driving rod; the first contact part of elastic component cooperates with the protection actuating lever, and the protection actuating lever promotes first contact part and first contact, and neutral pole moving contact is connected with reset spring one end, and the reset spring other end is connected with the casing.

Preferably, the electric leakage operating mechanism comprises a protection lever which is pivotally installed in the shell, and a protection jump buckle and a protection lock catch which are respectively pivotally installed on the protection lever and mutually matched with each other in a hasp mode, wherein the protection jump buckle is hinged to one end of the protection connecting rod, and the other end of the protection connecting rod is hinged to the handle of the circuit breaker.

Preferably, one end of the return spring is connected with the neutral pole moving contact, and the other end of the return spring is connected with the second contact element.

Preferably, the elastic part is a torsion spring, the elastic part comprises a spiral part connected between the first contact part and the second contact part, the spiral part is sleeved on the spring shaft and connected with the shell, and the first contact part and the second contact part are both arranged perpendicular to the axis of the spiral part; the second contact piece is arranged on one side, close to the static contact of the neutral pole, of the neutral pole moving contact, the first contact piece and the elastic piece are arranged on one side, far away from the static contact of the neutral pole, of the neutral pole moving contact, the neutral pole moving contact is connected with the second contact piece through the reset spring, the second contact portion penetrates through one side of the neutral pole moving contact to be matched with the second contact piece, and the first contact piece is connected with the test resistor arranged below the first contact piece.

Preferably, the first contact piece and the shaft machine coupling driving rod are arranged on two sides of the elastic piece in an opposite mode, the first contact part is provided with a fourth contact arm in a V shape, one end of the fourth contact arm inclines to one side close to the shaft machine coupling driving rod, and the other end of the fourth contact arm inclines to one side close to the first contact piece.

Preferably, one end of the shaft machine coupling driving rod is connected with one end of the protection driving rod, and a shaft machine coupling driving rod through hole matched with the other end of the shaft machine coupling driving rod is formed in the protection lever; the other end of the protection driving rod is provided with a contact driving rod which is rotationally connected with the neutral pole moving contact; one end of the protection driving rod is arranged on the protection lever in a stacked mode, and the neutral pole moving contact is arranged on the other end of the protection driving rod in a stacked mode.

Preferably, a bent contact arm bent toward the first contact is provided at an end of the fourth contact arm, and an outer side of the bent contact arm is in contact engagement with the first contact.

Preferably, a triangular moving contact guide groove is formed in the middle of the neutral pole moving contact, a moving contact guide post inserted into the moving contact guide groove is arranged in the shell, one end of a reset spring is sleeved in the guide groove, and a protection driving rod shaft hole and a neutral pole moving contact are respectively arranged on the two sides of the neutral pole moving contact corresponding to the moving contact guide groove.

Preferably, the neutral pole moving contact is in a V shape, the middle of the neutral pole moving contact protrudes to one side close to the second contact element, an opening avoiding the first contact element is formed on the other side of the neutral pole moving contact, and the neutral pole moving contact and the protection driving rod shaft hole are respectively arranged at two ends of the V-shaped neutral pole moving contact.

Preferably, the test button includes button connecting portion and sets up button operation portion and the button promotion portion at button connecting portion both ends respectively, the casing is stretched out to the other end of button operation portion, the other end and the cooperation of first contact site of button promotion portion, button connecting portion are connected with the one end on button promotion portion top side, the other end and the spacing cooperation of casing on button promotion portion top side, be equipped with first button promotion portion and the second button promotion portion of stretching first contact site both sides respectively in the bottom side of button promotion portion, form between first button promotion portion and the second button promotion portion with the spacing complex button promotion groove of first contact site.

Preferably, the electric leakage operating mechanism includes the protection lever of pivot installation in the casing to and respectively the pivot install on the protection lever and mutual hasp complex protection jump and buckle and protection hasp, the protection jumps to detain to be connected with the earth leakage protection handle through the protection connecting rod, the protection hasp passes through protection spring and is connected with the protection lever, protection spring can drive protection hasp and protection jump and detain the hasp and keep the energy storage, earth leakage release of earth leakage protection utmost point can unblock protection hasp and protection jump when earth leakage trouble appears, be equipped with the unblock lever that stretches protection lever one side on the looks utmost point operating mechanism of circuit breaker looks utmost point, the phase locking utmost point operating mechanism is separated through the unblock lever when protection hasp and protection jump detain the unblock.

Preferably, the phase pole operating mechanism comprises a breaker energy storage part, a rocker arm which is pivotally arranged in the shell and connected with the moving contact, a phase pole support which is pivotally arranged on the rocker arm, and a jump buckle and a lock catch which are respectively pivotally arranged on the phase pole support and matched with each other in a hasp manner, the jump buckle is connected with the phase pole handle through a connecting rod, the phase pole support is connected with the shell through the breaker energy storage part, when the phase pole operating mechanism is matched with the lock catch in a hasp manner, the phase pole operating mechanism keeps balance, and the phase pole handle rotates towards a closing direction, can drive the moving contact to be contacted with the fixed contact through the phase pole operating mechanism, and stores energy for the breaker energy; when the jump buckle and the lock catch release the matching of the buckle, the energy storage element releases energy and drives the moving contact and the static contact to be separated; the lock catch is provided with an unlocking lever matched with the leakage operating mechanism of the leakage protection electrode.

Preferably, the spiral portion is disposed at a side close to the test button, the first contact portion is in a U-shaped structure, the first contact portion includes a first contact arm, a third contact arm, and a second contact arm vertically connected between one ends of the first contact arm and the third contact arm, the second contact arm is disposed parallel to an axis of the spiral portion, one end of the second contact arm, which is far away from the first contact portion, extends to a swing plane of the protection driving rod, the other end of the first contact arm is connected with the spiral portion, the third contact arm extends between the protection driving rod and the second contact member, and the third contact arm and the protection driving rod are disposed in the same plane.

Preferably, the other end of the third contact arm, which is far away from the second contact arm, is connected with a fourth contact arm in a V-shaped structure, the fourth contact arm extends between the protection driving rod and the second contact member, the side edge of the side, which is connected with the second contact arm, of the fourth contact arm is inclined towards the direction close to the protection driving rod, the side edge of the other side of the fourth contact arm is inclined towards the direction close to the first contact member and is matched with the first contact member, a bent portion matched with the protection driving rod is formed at the connecting position of the side edges of the two sides of the fourth contact arm, and the protection driving rod enables one end, which is far away from the second contact arm, of the fourth contact.

Preferably, a curved contact arm is arranged at one end of the fourth contact arm, which is matched with the first contact member, the curved contact arm is bent towards the side far away from the first contact member, and an arc surface matched with the first contact member is formed on the outer side of the curved contact arm.

Preferably, the circuit breaker handle comprises a phase pole handle and an electric leakage protection handle, the phase pole handle is connected with a phase pole operating mechanism of a phase pole of the circuit breaker, the electric leakage protection handle is connected with an electric leakage operating mechanism of the electric leakage protection pole, a pushing block is arranged on the electric leakage protection handle, the pushing block extends to one side of the phase pole handle rotating towards a closing direction, and when the electric leakage protection handle rotates towards a switching-off direction due to the occurrence of electric leakage current, the phase pole handle is pushed to rotate towards the switching-off direction through the pushing block; when overload or short circuit current occurs, the phase pole handle rotates towards the opening direction, but the leakage protection handle does not act.

Preferably, a partition plate is arranged between the phase pole of the circuit breaker and the earth leakage protection pole, a spring shaft used for installing a spiral part of the elastic part is arranged on the partition plate, a stop block used for limiting the protection driving rod is arranged on the partition plate, and the stop block is matched with one end, close to the neutral pole moving contact, of the protection driving rod.

According to the circuit breaker, the testing mechanism forms a testing loop with double breakpoints through the two contacts of the first contact part and the second contact part on the elastic piece, the first contact part is driven by the movable shaft motor coupling driving rod to be in contact with the first contact piece, the fact that the testing loop is not conducted when a testing button is pressed down when the phase pole of the circuit breaker is opened can be guaranteed, the reliability of the circuit breaker is further improved, the action speed of the operating mechanism can be improved through the cooperation of the first contact part and the operating mechanism, and particularly when overload or leakage current occurs to a circuit, the circuit breaker can be tripped to cut off the circuit more quickly.

In addition, the elastic part adopts the torsional spring not only can directly overlap the installation in the casing, and the casing passes through the spring spacing groove moreover and carries on spacingly to the one end of elastic part, can further reduce the degree of difficulty of assembly, still has simple structure and characteristics with low costs.

In addition, one end of the protection driving rod is provided with the shaft machine coupling driving hole, the other end of the protection driving rod is provided with the contact driving rod, the protection driving rod has the advantages of being simple in structure, convenient to process and assemble, and the shaft machine coupling driving boss can improve the connection strength of the shaft machine coupling driving hole and the shaft machine coupling driving rod.

Drawings

Fig. 1 is a front view of a phase pole of a circuit breaker of the present invention;

fig. 2 is a front view of the earth leakage protection electrode of the present invention;

FIG. 3 is a schematic diagram of the leakage testing mechanism and the leakage operating mechanism according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a neutral pole moving contact, a protection driving rod, a protection lever and a matching structure in accordance with a first embodiment of the present invention;

FIG. 5 is a side view of FIG. 12 of the present invention;

FIG. 6 is a schematic view of the construction of the spring of the present invention;

FIG. 7 is a schematic structural diagram of a guard driving rod according to a first embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a test button according to an embodiment of the present invention;

FIG. 9 is a schematic view of the coupling of the driving rod and the protection lever in the middle shaft machine according to the embodiment of the present invention;

FIG. 10 is a top view of the spring of the present invention;

FIG. 11 is a side view of the spring of the present invention;

fig. 12 is a partial schematic structural view of a circuit breaker according to a second embodiment of the present invention;

FIG. 13 is a schematic diagram of the leakage testing mechanism and the leakage operating mechanism according to the second embodiment of the present invention;

FIG. 14 is another schematic diagram of the leakage testing mechanism and the leakage operating mechanism according to the second embodiment of the present invention;

fig. 15 is a schematic structural diagram of a leakage protection electrode according to a second embodiment of the present invention;

FIG. 16 is a schematic structural view of a phase operation mechanism in the second embodiment of the present invention;

FIG. 17 is a schematic diagram of the current flow in the leakage test loop when the circuit breaker of the present invention is being wired;

fig. 18 is a schematic diagram of the current flow direction in the leakage test loop when the circuit breaker is reverse-wired.

Detailed Description

The following describes the circuit breaker according to the present invention with reference to the embodiments shown in fig. 1 to 18. The circuit breaker of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1-2, the circuit breaker of the present invention includes a housing, a circuit breaker phase pole 1 and a leakage protection pole 2 disposed side by side on two sides of the housing, a partition 32 is disposed between the circuit breaker phase pole 1 and the leakage protection pole 2, the circuit breaker phase pole 1 includes a fixed contact 111 and a movable contact 112 disposed oppositely and respectively connected to a circuit, the movable contact 112 is mounted on a phase pole operating mechanism 14 to swing to cooperate with the fixed contact 111, the leakage protection pole 2 includes a zero sequence current transformer 21, a leakage operating mechanism 22 and a leakage testing mechanism 25, a main loop of the circuit breaker phase pole 1 passes through the zero sequence current transformer 21, and the zero sequence current transformer 21 unlocks the phase pole operating mechanism 14 to drive the movable contact 112 to be separated from the fixed contact 111 when a leakage current occurs in the main loop through the leakage operating mechanism;

the leakage test mechanism 25 comprises an elastic member 26, a test button 29, and a first contact member 27 and a second contact member 28 which are respectively connected to a main circuit of a phase 1 of the circuit breaker, wherein one end of the elastic member 26 is provided with a first contact portion 261, the other end of the elastic member 26 is provided with a second contact portion 262 matched with the test button 29, when the phase 1 of the circuit breaker is closed, the leakage operation mechanism 22 or the phase operation mechanism 14 pushes the first contact portion 261 to be contacted with the first contact member 27 through a neutral drive member connected with a neutral movable contact 212, the test button 29 can push the second contact portion 262 to be contacted with the second contact member 28, and when the first contact portion 261 and the second contact portion 262 are respectively contacted with the first contact member 27 and the second contact member 28, the test circuit can be conducted to generate a leakage test signal in the main circuit.

In the circuit breaker provided by the invention, the testing mechanism 25 forms a testing loop with double breakpoints through two contacts of the first contact part 261 and the second contact part 262 on the elastic piece 26, and the first contact part 261 and the second contact part 262 are respectively driven by the operating mechanism and the testing button 29, so that the testing loop can be ensured not to be conducted when the testing button 29 is pressed down when the phase pole 1 of the circuit breaker is opened, the reliability of the circuit breaker is improved, the action speed of the operating mechanism can be improved through the cooperation of the first contact part 261 and the operating mechanism, and particularly when overload or leakage current occurs in a line, the leakage operating mechanism 22 can be helped to trip the circuit breaker to cut off the line more quickly.

As shown in fig. 10, an embodiment of the phase operating mechanism 14 is shown, the phase operating mechanism 14 includes a circuit breaker energy storage member, a rocker 141 pivotally mounted in the housing and connected to the movable contact 112, a trip latch 142 and a latch 143 pivotally mounted on the rocker 141 and snap-fitted to each other, and a link 144 hinged to the trip latch 142, wherein the other end of the link 144 is hinged to a circuit breaker handle 31 extending out of the housing, when the trip latch 142 and the latch 143 snap-fitted to each other, the phase operating mechanism 14 is balanced, and the circuit breaker handle 31 can drive the phase operating mechanism 14 to bring the movable contact 112 into contact with the stationary contact 111 to open and close the main circuit and separate the main circuit to open and close the circuit breaker, and store energy for the circuit breaker energy storage member during closing.

Further, the circuit breaker phase pole 1 comprises an electromagnetic tripping mechanism 12, a bimetal tripping mechanism 13 and an arc extinguishing mechanism, a static contact 111 is fixed in the shell and is connected with the electromagnetic tripping mechanism 12 and a connecting terminal 15 at the left end through a main loop conducting piece, a moving contact 112 is installed on the phase pole operating mechanism 14 and swings to be matched with the static contact 111 and is connected with the bimetal tripping mechanism 15 and a circuit breaker connecting terminal 14 at the right end through the main loop conducting piece, when a circuit is short-circuited, overloaded and leaked, the electromagnetic tripping mechanism 12, the bimetal tripping mechanism 13 and the leakage operating mechanism 22 respectively drive a tripping button 142 and a locking button 143 to be separated and tripped, so that the phase pole operating mechanism 14 is unbalanced, and the moving contact 112 is driven to leave the static contact 111 to be disconnected with the main loop through energy release of an energy storage piece to cut off a fault circuit.

Referring to the first embodiment shown in fig. 1-9, the earth leakage protection electrode 2 includes a zero sequence current transformer 21, an earth leakage operating mechanism 22, an earth leakage testing mechanism 25, and a neutral pole fixed contact 211 and a neutral pole movable contact 212 oppositely disposed in the housing, the neutral pole movable contact 212 is connected to the earth leakage operating mechanism 22 through a protection driving rod 225, the other end of the protection driving rod 225 is hinged to one side of the earth leakage operating mechanism 22 through a shaft-machine coupling driving rod 220, the other side of the earth leakage operating mechanism 22 is connected to the breaker handle 31, the shaft-machine coupling driving rod 220 is disposed perpendicular to the swing plane of the protection driving rod 225, and both ends of the shaft-machine coupling driving rod 220 are respectively connected to the protection driving rod 225 and the earth leakage operating mechanism 22, a first contact member 27 is disposed on one side of the shaft-machine coupling driving rod 220, a first contact portion 261 of an elastic member 26 extends between the shaft-machine coupling driving rod 220 and the first, the test button 29 can push the second contact portion 262 to contact with the second contact member 28, and the electromechanical coupling driving rod 220 can push the first contact portion 261 to contact with the first contact member 27 when the circuit breaker is closed.

When the breaker handle 31 rotates to the on-position, the leakage operating mechanism 22 drives the protection driving rod 225 to drive the neutral pole fixed contact 211 to contact with the neutral pole moving contact 212 through the shaft-machine coupling driving rod 220, and pushes the first contact portion 261 to contact with the first contact member 27 through the shaft-machine coupling driving rod 220, when the breaker handle 31 rotates to the off-position, the shaft-machine coupling driving rod 220 is driven to be away from the first contact portion 261, and the first contact portion 261 resets under the action of self elasticity and pushes the breaker handle 31 to rotate to the off-position with acceleration. In the present embodiment, on the basis of the double-break test circuit, the first contact portion 261 is driven by the movable electromechanical coupling driving lever 220 of the leakage operating mechanism 22 to contact with the first contact 27, so that it can be ensured that the test button 29 is pressed to not conduct the test circuit when the breaker phase pole 1 is opened, and the reliability of the breaker is further improved, and the elastic member 26 is matched with the movable electromechanical coupling driving lever 220, and the operating speed of the leakage operating mechanism 22 can be further improved.

As a preferred embodiment of the electrical leakage operating mechanism 22, the electrical leakage operating mechanism 22 includes a protection lever 221 pivotally mounted in a housing, and a protection trip 222 and a protection latch 224 pivotally mounted on the protection lever 221 and snap-fitted to each other, respectively, the protection trip 222 is hinged to one end of a protection link 223, the other end of the protection link 223 is hinged to the circuit breaker handle 31, the protection drive rod 225 is hinged to the protection lever 221 through a shaft-machine coupling drive rod 220, the neutral movable contact 212 is hinged to the protection drive rod 225, the neutral movable contact 212 is connected to one end of a return spring 227, the other end of the return spring 227 is connected to the housing, and the circuit breaker handle 31 can drive the neutral movable contact 212 to swing through the protection drive rod 225 when the protection trip 222 and the protection latch 224 are snap-fitted to each other. One end of the protection shaft machine coupling driving rod 220 is connected with one end of the protection driving rod 225, a shaft machine coupling driving rod through hole matched with the other end of the shaft machine coupling driving rod 220 is arranged on the protection lever 221, and the other end of the shaft machine coupling driving rod 220 penetrates through the shaft machine coupling driving rod through hole and extends to the other side of the protection lever 221 to be connected with the limiting part 226. Of course, the earth leakage operating mechanism 22 may have other configurations.

Referring to fig. 2, the closing process is: the breaker handle 31 rotates clockwise, the breaker handle 31 pushes the link 223, the link 223 pushes the jump buckle 222 and the lock buckle 224 to drive the protection lever 221 to rotate clockwise, and the protection lever 221 compresses the elastic piece 261 to store energy until the mechanism is closed.

The tripping process comprises the following steps: when the line is overloaded or has a leakage current, the leakage release 23 pushes the latch 224 to trip the trip 222 and release the protection lever 221, and the protection lever 221 can rotate more quickly in the counterclockwise direction under the action of the return spring and the elasticity 261.

Further, the return spring 227 has one end connected to the neutral moving contact 212 and the other end connected to the second contact member 28. The second contact member 28 functions both as a break point for the test circuit and as a hold for the return spring 227. Meanwhile, the return spring 227 functions to cooperate with the neutral movable contact 212 and also functions to electrically connect the neutral movable contact 212 with the second contact member 28.

Further, the second contact member 28 is disposed on a side of the neutral moving contact 212 close to the neutral stationary contact 211, the first contact member 27 and the elastic member 26 are disposed on a side of the neutral moving contact 212 far from the neutral stationary contact 211, the neutral moving contact 212 is connected to the second contact member 28 through the return spring 227, the second contact portion 262 passes through the side of the neutral moving contact 212 to be matched with the second contact member 28, the first contact member 27 is connected to the test resistor 251 disposed below the first contact member 27, the first contact member 27 and the second contact member 28 are respectively disposed on two sides of the neutral stationary contact 211, so that the testing device has the characteristics of compact structure, short moving stroke and high operating speed, and the second contact member 28 plays a role of returning the neutral moving contact 212 through the connection with the return spring 227 on the basis of conducting a test loop, a rock bird, the design is ingenious.

Referring to fig. 3-7, a preferred embodiment of the protection driving rod 225 is shown, wherein one end of the protection driving rod 225 is provided with a shaft-machine coupling driving boss 2251 axially disposed along the shaft-machine coupling driving rod 220, a shaft-machine coupling driving hole 2252 disposed on the shaft-machine coupling driving boss 2251 and sleeved on the shaft-machine coupling driving rod 220, the other end of the protection driving rod 225 is provided with a contact driving boss 2253, the contact driving rod 2254 is disposed on the contact driving boss 2253 and rotatably connected to the neutral pole moving contact 212, the contact driving rod 2254 is disposed perpendicular to the swinging plane of the neutral pole moving contact 212, one end of the protection driving rod 225 is stacked on the protection lever 221, and the neutral pole moving contact 212 is stacked on the other end of the protection driving rod 225. In this embodiment, the shaft-machine coupling driving hole 2252 is formed at one end of the protection driving rod 225, and the contact driving rod 2254 is formed at the other end of the protection driving rod 225, so that the shaft-machine coupling driving boss 2251 has the advantages of simple structure, convenience in processing and convenience in assembly, and the connection strength between the shaft-machine coupling driving hole 2252 and the shaft-machine coupling driving rod 220 can be improved.

Referring to fig. 6, a preferred embodiment of the elastic member 26 is shown, the elastic member 26 is a torsion spring, the elastic member 26 includes a spiral portion 263 connected between a first contact portion 261 and a second contact portion 262, the spiral portion 263 is sleeved on the spring shaft 260 and connected with the housing, the first contact portion 261 and the second contact portion 262 are both arranged perpendicular to the axis of the spiral portion 263, the first contact portion 261 extends between the protection driving rod 225 and the first contact member 27, and the second contact portion 262 extends between the test button 29 and the second contact member 28.

The first contact portion 261 includes a first contact arm 261a, a second contact arm 261b and a third contact arm 261c which are connected in a U-shape, the first contact arm 261a and the third contact arm 261c are arranged oppositely, the second contact arm 261b is vertically connected between one ends of the first contact arm 261a and the third contact arm 261c, the other end of the first contact arm 261a is connected with the spiral portion 263, the other end of the third contact arm 261c is connected with the fourth contact arm 261d, the fourth contact arm 261d extends between the shaft machine coupling driving rod 220 and the second contact member 28, and the first contact portion 261 is inserted into the spring limiting groove 261e along the direction of the second contact arm 261b for limiting and matching.

Further, the first contact member 27 is disposed on both sides of the elastic member 26 opposite to the shaft-machine coupling driving lever 220, the fourth contact arm 261d of the first contact portion 261 has a V-shape, one end of the fourth contact arm 261d is inclined toward a side close to the shaft-machine coupling driving lever 220, and the other end of the fourth contact arm 261d is inclined toward a side close to the first contact member 27. The first contact portion 261 not only can effectively reduce the distance between the first contact portion 261 and the first contact member 27 and accelerate the speed of conducting the test circuit, but also has higher elasticity through the fourth contact arm 261d arranged in a V shape, and not only has the characteristic of high resetting speed, but also can not damage the first contact member 27 due to hard contact.

Further, the end of the fourth contact arm 261d is provided with a bent contact arm 261f bent toward the first contact 27, and the outer side of the bent contact arm 261f is in contact fit with the first contact 27, so that the contact area can be increased, and reliable contact can be ensured.

Referring to fig. 3-7, a triangular moving contact guide groove 213 is disposed in the middle of the neutral moving contact 212, a moving contact guide post 214 inserted into the moving contact guide groove 213 and engaged with the moving contact guide groove 213 is disposed in the housing, one end of a return spring 227 is sleeved in the guide groove 213, the neutral moving contact 212 is disposed on two sides of the moving contact guide groove 213 and respectively provided with a protective driving rod shaft hole and a neutral moving contact 215, and the neutral moving contact 215 is engaged with a neutral stationary contact 216 on the neutral stationary contact 211. The neutral pole moving contact 212 of the present embodiment has the characteristics of small volume, simple structure and convenient processing and manufacturing, and can reduce the production cost and the assembly difficulty.

Further, the neutral pole moving contact 212 is V-shaped, the middle of the neutral pole moving contact 212 protrudes to one side close to the second contact element 28, an opening 217 avoiding the first contact element 27 is formed on the other side of the neutral pole moving contact 212, the neutral pole moving contact 215 and the shaft hole of the protection driving rod are respectively arranged at two ends of the V-shaped neutral pole moving contact 212, a test resistor 251 connected with the first contact element 27 is arranged on one side of the neutral pole moving contact 212, mutual interference among parts can be avoided, the structure of the test mechanism is further compact, and the occupied space is reduced.

Referring to fig. 2 and 7, a preferred embodiment of the test button 29 is shown, where the test button 29 includes a button connection portion 291, and a button operation portion 292 and a button pushing portion 293 respectively disposed at two ends of the button connection portion 291, where the other end of the button operation portion 292 extends out of the housing, the other end of the button pushing portion 293 is engaged with the first contact portion 261, the button connection portion 291 is connected with one end of the top side of the button pushing portion 293, the other end of the top side of the button pushing portion 293 is engaged with the housing in a limiting manner, a first button pushing portion 297 and a second button pushing portion 298 respectively extending to two sides of the first contact portion 261 are disposed at the bottom side of the button pushing portion 293, and a button pushing groove 299 engaged with the first contact portion 261 in a limiting manner is formed between the first button pushing portion 297 and the second button pushing portion 298.

As shown in fig. 10 to 16, an embodiment two of the circuit breaker of the present invention is shown, and the difference between this embodiment and the above embodiment one is that a neutral line driving member is not connected between the earth leakage operating mechanism 22 and the neutral pole movable contact 212, the neutral line driving member of this embodiment is connected between the phase pole operating mechanism 14 of the phase pole 1 of the circuit breaker and the neutral pole movable contact 212, the neutral line driving member is driven by the phase pole operating mechanism 14 of the phase pole 1 of the circuit breaker, the neutral line driving member includes a protection driving rod 225 connected to the neutral pole movable contact 212 of the neutral line movable contact, and a shaft-motor coupling driving rod 220 connected between the protection driving rod 225 and the; the first contact portion 261 of the resilient member 26 engages the saver drive rod 225 of the neutral drive.

Specifically, the leakage protection phase pole 2 is arranged on one side of the circuit breaker phase pole 1, and the leakage protection phase pole 2 comprises a zero sequence current transformer 21, a leakage operating mechanism 22, a leakage release 23, a leakage testing mechanism 25, a protection circuit board 211 and a neutral contact mechanism;

the circuit breaker phase pole 1 comprises a phase pole release, a phase pole operating mechanism 14 and a phase pole contact mechanism, wherein the phase pole release comprises an electromagnetic release mechanism 12 and/or a bimetallic release mechanism 13;

the phase pole contact mechanism comprises a fixed contact 111 and a movable contact 112 which are respectively connected with the phase line, the neutral contact mechanism comprises a neutral pole movable contact 212 and a neutral pole fixed contact 211 which are respectively connected with the neutral line, and the neutral pole movable contact 212 is connected with the phase pole operating mechanism 14 of the phase pole 1 of the circuit breaker through a protection driving rod 225;

the leakage test mechanism 25 includes a test button 29 and a leakage test circuit including an elastic member 26, a first contact member 27, and a second contact member 28, the elastic member 26 including a first contact portion 261 and a second contact portion 262 connected, the first contact portion 261 being disposed between the first contact member 27 and the protection drive lever 225, the second contact portion 262 being disposed between the second contact member 28 and the test button 29;

when the circuit breaker phase pole 1 is closed, the phase pole operating mechanism 14 pushes the first contact portion 261 of the elastic member 26 to contact with the first contact member 27 through the protection driving rod 225, and when the test button 29 is pressed, the test button 29 pushes the second contact portion 262 of the elastic member 26 to contact with the second contact member 28, a loop is formed between the first contact member 27 and the second contact member 28 through the elastic member 26, and the electric leakage test loop is conducted.

The zero sequence current transformer 21 of the leakage protection phase pole 2 is sleeved on a neutral line and a leakage test loop, when the leakage test loop is conducted, the condition of leakage current of the neutral line is simulated, the zero sequence current transformer 21 senses the leakage current, the zero sequence current transformer 21 drives a leakage release 23 to unlock a leakage operating mechanism 22, meanwhile, the leakage operating mechanism 22 drives a phase pole operating mechanism 14 of a circuit breaker phase pole 1 to unlock, when the phase pole operating mechanism 14 unlocks, a moving contact 111 and a moving contact 112 are separated, the accessed phase line is disconnected, and meanwhile, a protection driving rod 225 drives a neutral pole moving contact 212 and a neutral pole static contact 211 to separate, and the accessed neutral line is disconnected.

A first test contact of the electrical leakage test circuit is formed by the first contact portion 261 of the elastic member 26 and the first contact member 27, and a second test contact of the electrical leakage test circuit is formed by the second contact portion 262 of the elastic member 26 and the second contact member 28 in cooperation, and the closing and opening of the second test contact are controlled by the test button 29;

after the circuit breaker is connected with a power supply, when the circuit breaker phase pole 1 is in a switching-off state, the second test contact is in a switching-off state, the test button 29 is pressed at the moment, after the second test contact is closed, because the first test contact is in the switching-off state, a leakage test loop cannot be conducted, and the load side of the circuit breaker cannot form a voltage to ground or a voltage to the protection circuit board 211.

When the circuit breaker phase pole 1 is in a closing state, the first test contact is in a closing state, the test button 29 is pressed at the moment, the first test contact is closed, the electric leakage test loop is conducted to simulate an electric leakage signal, and the circuit breaker phase pole 1 trips, so that the electric leakage protection function of the electric leakage protection phase pole 2 is not failed.

In the circuit breaker of the embodiment, the first contact portion 261 of the elastic element 26 and the first contact element 27 form a first test contact of the leakage test circuit, and the second contact portion 262 of the elastic element 26 and the second contact element 28 are matched to form a second test contact of the leakage test circuit, the closing and the opening of the second test contact are controlled by the test button 29, the first test contact is controlled by the phase pole operating mechanism 14 of the circuit breaker phase pole 1, so that the closing and the opening of the first test contact are performed synchronously with the closing and opening actions of the circuit breaker phase pole 1, and therefore, the circuit breaker not only can effectively avoid that when the circuit breaker phase pole 1 is opened, the single-contact leakage test circuit is conducted by pressing the test button 29, and the leakage test circuit generates the voltage to the ground or the voltage to the protection circuit board 211, but also has the characteristics of compact structure, small volume and high reliability.

When the breaker handle 31 rotates to the closing position, the phase pole operating mechanism 14 of the breaker phase pole 1 drives the protection driving rod 225 through the shaft machine coupling driving rod 220 to push the first contact part 261 to contact with the first contact member 27; when the breaker handle 31 is rotated to the open position, the phase pole operating mechanism 14 of the breaker phase pole 1 drives the protection driving rod 225 away from the first contact portion 261 through the coupling driving rod 220.

In this embodiment, on the basis of the double-breakpoint test loop, the first contact portion 261 is driven by the shaft-machine coupling driving rod 220 of the leakage operating mechanism 22 instead of being driven by the protection driving rod 225 of the leakage operating mechanism 22, and the contact area between the protection driving rod 225 and the first contact portion 261 is larger, so that the matching is more reliable, and the assembly difficulty is lower.

Referring to the first and second embodiments, the circuit breaker provided by the invention comprises a circuit breaker phase pole 1 (fig. 1), an earth leakage protection pole 2 (fig. 2), an earth leakage testing mechanism 25 (fig. 3), and operating mechanisms respectively matched with the circuit breaker phase pole 1 and the earth leakage protection pole 2, wherein the circuit breaker phase pole 1 and the earth leakage protection pole 2 respectively comprise a phase pole contact mechanism and a neutral line contact mechanism of an access line;

when the circuit breaker is switched on, the operating mechanism respectively drives the phase pole contact mechanism and the neutral line contact mechanism to conduct a circuit, and when the circuit is in fault, the operating mechanism unlocks and respectively drives the phase pole contact mechanism and the neutral line contact mechanism to disconnect the circuit;

the leakage test mechanism 25 comprises a test button 29 and a leakage test loop, the leakage test loop comprises a second test contact matched with the test button 29 and a first test contact matched with the operating mechanism, the test button 29 can drive the second test contact to be closed and separated, and the operating mechanism can drive the first test contact to be closed and separated while driving the phase pole contact mechanism and the neutral line contact mechanism to conduct and break the circuit; when the first test contact and the second test contact are both closed, the electric leakage test loop is conducted and generates an electric leakage fault test signal to unlock the operating mechanism; when the first test contact and the second test contact are separated, the leakage test loop is disconnected.

In the circuit breaker provided by the invention, the first test contact and the second test contact of the electric leakage test circuit are respectively controlled by the operating mechanism and the test button 29, the electric leakage test circuit can be conducted only when the first test contact and the second test contact are closed, the electric leakage test circuit can not be conducted when any one of the first test contact and the second test contact is disconnected, the voltage to the ground or the voltage to a circuit board can not be formed on the load side of the circuit breaker, and the load and the circuit board can be reliably protected.

The circuit comprises a phase line and a neutral line, the phase electrode contact mechanism is connected into the phase line, the neutral line contact mechanism is connected into the neutral line, the operating mechanism comprises a phase electrode operating mechanism 14 matched with the phase electrode contact mechanism, and an electric leakage operating mechanism 22 arranged on one side of the phase electrode operating mechanism 14 and matched with the neutral line contact mechanism, and the phase electrode operating mechanism 14 and the electric leakage operating mechanism 22 are matched with each other;

when the circuit breaker is switched on, the phase pole operating mechanism 14 and the leakage operating mechanism 22 are respectively locked in an energy storage state, the phase pole operating mechanism 14 drives the phase pole contact mechanism to conduct a phase line, the leakage operating mechanism 22 drives the neutral line contact mechanism to conduct a neutral line, the phase pole operating mechanism 14 or the leakage operating mechanism 22 corresponding to the line is unlocked and drives the other one to be unlocked, and the phase pole contact mechanism and the neutral line contact mechanism are respectively disconnected from the phase line and the neutral line.

The first test contact of the leakage test circuit, which is matched with the operating mechanism, can be controlled by the leakage operating mechanism 22 of the operating mechanism, and also can be controlled by the phase pole operating mechanism 14 of the operating mechanism.

The phase pole contact mechanism is connected with the phase pole operating mechanism 14, the neutral line contact mechanism is connected with the phase pole operating mechanism 14 or the leakage operating mechanism 22 through a neutral line driving piece, and the neutral line driving piece drives the first test contact to be closed and separated.

The first test contact is controlled by the leakage operating mechanism 22 for the first test, which is the first embodiment of the circuit breaker of the present invention, the neutral contact mechanism is connected to the leakage operating mechanism 22 through the neutral driving member, and the first test contact is matched with the neutral driving member. The neutral line driving member comprises a protection driving rod 225 and a shaft machine coupling driving rod 220, one end of the protection driving rod 225 is connected with the neutral pole moving contact 212, and the other end of the protection driving rod 225 is hinged with the electric leakage operating mechanism 22 through the shaft machine coupling driving rod 220; the first contact portion 261 of the elastic element 26 is engaged with the shaft-machine coupling driving rod 220, the shaft-machine coupling driving rod 220 pushes the first contact portion 261 to contact with the first contact element 27, the neutral pole moving contact 212 is connected with one end of the return spring 227, and the other end of the return spring 227 is connected with the housing.

The first test contact is controlled by the phase pole operating mechanism 14 for the first test, which is the second embodiment of the circuit breaker created by the present invention, the neutral contact mechanism is connected to the phase pole operating mechanism 14 through a neutral driving member, and the first test contact is matched with the neutral driving member. The neutral line driving member comprises a protection driving rod 225 and a shaft machine coupling driving rod 220, one end of the protection driving rod 225 is connected with the neutral pole moving contact 212, and the protection driving rod 225 is hinged with the phase pole operating mechanism 14 through the shaft machine coupling driving rod 220; the first contact portion 261 of the elastic member 26 is engaged with the protection driving rod 225, the protection driving rod 225 pushes the first contact portion 261 to contact with the first contact member 27, the neutral pole moving contact 212 is connected with one end of the return spring 227, and the other end of the return spring 227 is connected with the housing.

The two embodiments of the circuit breaker created by the invention have the following characteristics:

as shown in fig. 3, the leakage test mechanism 25 includes a first contact member 27 and a second contact member 28, the elastic member 26 is a torsion spring, the elastic member 26 includes a spiral portion 263 connected between a first contact portion 261 and a second contact portion 262, the spiral portion 263 is sleeved on the spring shaft 260 and connected with the housing, the first contact portion 261 is disposed between the neutral drive and the first contact member 27 and forms a first test contact with the first contact member 27, and the second contact portion 262 is disposed between the second contact member 28 and the test button 29 and forms a second test contact with the second contact member 28.

In the circuit breaker provided by the invention, the first contact part 261 and the second contact part 262 on the elastic part 26 respectively form the first test contact and the second test contact of the electric leakage test circuit, so that not only can the reliability of the electric leakage test circuit be ensured, but also the action speed of the operating mechanism can be improved by matching the first contact part 261 with the operating mechanism.

Fig. 17 shows the leakage test circuit when the circuit breaker is connected in the forward direction, and fig. 18 shows the leakage test circuit when the circuit breaker is connected in the reverse direction; one end of the electric leakage test loop is connected with a phase line connected with the circuit breaker phase pole 1, and the other end of the electric leakage test loop is connected with a neutral line connected with the electric leakage protection pole 2. Specifically, the leakage test circuit further includes a test resistor 251 and a return spring 227, the first contact 27 is connected to the phase line through the test resistor 251 and the circuit breaker phase pole 1, one end of the return spring 227 and the neutral line contact mechanism are connected to the neutral line, and the other end of the return spring 227 is rotatably mounted on the second contact 28. When the first test contact and the second test contact are both closed, the leakage test circuit is conducted between the phase line and the neutral line to generate a leakage fault test signal, so that the leakage test circuit can be formed by the neutral line contact mechanism and the first contact member 27, and the reset spring 227 can increase the contact pressure of the neutral line contact mechanism. Of course, the leakage test circuit may also adopt other schemes to simulate the generation of leakage current, and all belong to the protection scope of the present invention.

As shown in fig. 1 and 12, the operating mechanism is connected to a breaker handle 31, the breaker handle 31 includes a phase handle 31a and an earth leakage protecting handle 31b, the phase handle 31a is connected to a phase operating mechanism 14 of a phase 1 of the breaker, the earth leakage protecting handle 31b is connected to an earth leakage operating mechanism 22 of an earth leakage protecting electrode 2, a pushing block 31c is disposed on the earth leakage protecting handle 31b, the pushing block 31c extends to a side of the phase handle 31a rotating in a closing direction, when an earth leakage current is generated to rotate in an opening direction, the earth leakage protecting handle 31b pushes the phase handle 31a to rotate in the opening direction through the pushing block 31c, so as to accelerate an operation speed of the breaker; when overload or short-circuit current occurs, the phase pole handle 31a rotates towards the opening direction, but the leakage protection handle 31b does not act, the reason of the fault can be indicated through the positions of the phase pole handle 31a and the leakage protection handle 31b, and if the phase pole handle 31a and the leakage protection handle 31b act, the reason of the fault is the overload or short-circuit current; if the phase handle 31a is operated and the leakage protection handle 31b is not operated, the cause of the failure is the leakage current.

In the first embodiment, the neutral contact mechanism is connected to the earth leakage protection mechanism 22 of the operating mechanism through a neutral driving member, where the neutral driving member includes a protection driving rod 225 connected to the neutral moving contact, and a shaft-machine coupling driving rod 220 connected between the protection driving rod 225 and the earth leakage protection mechanism 22; the first contact portion 261 of the elastic member 26 is engaged with the protection driving lever 225 of the neutral driving member or the coupling driving lever 220 of the spindle motor.

Referring to fig. 17, in the leakage test loop when the circuit breaker is in the positive connection state, current flows from the connection terminal 15 at the right end of the circuit breaker phase 1, and flows to the connection terminal 15 at the right end of the leakage protection pole 2 through the movable contact 112 of the circuit breaker phase 1, the fixed contact 111 of the circuit breaker phase 1, the zero sequence current transformer 21 of the leakage protection pole 2, the connection terminal 15 at the left end of the circuit breaker phase 1, the test resistor 251, the first contact 27, the second test contact, the first test contact, the elastic member 26, the return spring 227, and the neutral movable contact 212.

Referring to fig. 18, in the test loop during reverse connection of the circuit breaker, current flows from the connection terminal 15 at the left end of the phase pole 1 of the circuit breaker, and flows to the connection terminal 15 at the left end of the earth leakage protection pole 2 through the test resistor 251, the first contact 27, the elastic element 26, the first test contact, the second test contact, the return spring 227, the neutral moving contact 212, the neutral fixed contact 211, and the zero sequence current transformer 21.

As shown in fig. 10-11, the present embodiment is the structure of the elastic member 26. The structure of the elastic member 26 of this embodiment is the same as that of the elastic member 26 of the first embodiment, but differs in that the first contact portion 261 of the elastic member 26 of this embodiment engages with the protection driving rod 225. That is, the first contact member 27 is disposed opposite to the protection driving rod 225 on both sides of the elastic member 26, the fourth contact arm 261d of the first contact portion 261 has a V-shape, and one end of the fourth contact arm 261d is inclined toward the protection driving rod 225.

Specifically, the elastic member 26 is a torsion spring, the elastic member 26 includes a spiral portion 263 connected between a first contact portion 261 and a second contact portion 262, the spiral portion 263 is sleeved on the spring shaft 260 and connected with the housing, the first contact portion 261 and the second contact portion 262 are both arranged perpendicular to an axis of the spiral portion 263, the first contact portion 261 extends between the protection driving rod 225 and the first contact member 27, and the second contact portion 262 extends between the test button 29 and the second contact member 28.

Further, the spiral portion 263 is disposed at a side close to the test button 29, the first contact portion 261 has a U-shaped structure, the first contact portion 261 includes a first contact arm 261a, a third contact arm 261c, and a second contact arm 261b vertically connected between the first contact arm 261a and one end of the third contact arm 261c, the second contact arm 261b is disposed parallel to an axis of the spiral portion 263, one end of the second contact arm 261b away from the first contact portion 261a extends to a swing plane of the protection driving rod 225, the other end of the first contact arm 261a is connected to the spiral portion 263, the third contact arm 261c extends between the protection driving rod 225 and the second contact 28, and the third contact arm 261c and the protection driving rod 225 are disposed in the same plane.

Furthermore, the other end of the third contact arm 261c, which is away from the second contact arm 261b, is connected to a fourth contact arm 261d in a V-shaped structure, the fourth contact arm 261d extends between the protection driving rod 225 and the second contact 28, the side edge of the side, where the fourth contact arm 261d is connected to the second contact arm 261b, is inclined in the direction close to the protection driving rod 225, the side edge of the other side of the fourth contact arm 261d is inclined in the direction close to the first contact 27 and is matched with the first contact 27, a bent portion matched with the protection driving rod 225 is formed at the connection position of the side edges on both sides of the fourth contact arm 261d, and the protection driving rod 225 pushes the bent portion of the fourth contact arm 261d to make one end, which is away from the second contact arm 261b, of the fourth contact arm 261d contact the first contact 27. Through the fourth contact arm 261d with the V-shaped structure, not only can the layout of the parts be optimized and a reliable and safe electrical distance between the first contact member 27 and other parts be ensured, but also the distance between the first contact portion 261 and the protection driving rod 225 can be reduced, so that the protection driving rod 225 drives the first contact portion 261 to operate, and the sensitivity of the elastic member 26 is ensured.

Further, a curved contact arm 261f is provided at an end of the fourth contact arm 261d that engages with the first contact 27, and the curved contact arm 261f is curved to a side away from the first contact 27, and an arc surface that engages with the first contact 27 is formed on an outer side of the curved contact arm 261 f. The fourth contact arm 261d is in contact with the first contact 27 through the arc surface formed on the bent contact arm 261f, so that the contact area is larger and the contact is more reliable.

As shown in fig. 15, a partition plate 32 is disposed between the breaker phase electrode 1 and the earth leakage protection electrode 2, the partition plate 32 is provided with a spring shaft 260 for mounting a spiral portion 263 of the elastic member 26, the partition plate 32 is provided with a button guide plate 294 fitted to one side of the test button 29 on one side of the spring shaft 260, a spring retaining groove 261e fitted to the first contact portion 261 of the elastic member 26 is provided on the other side of the button guide plate 294, the spiral portion 263 is rotatably fitted over the spring shaft 260, and the first contact arm 261a, the second contact arm 261b, and the third contact arm 261c of the first contact portion 261 are inserted into the spring retaining groove 261e for retaining engagement. Preferably, the third contact arm 261c extends to the outside of the spring stopper groove 261e and then is connected to the fourth contact portion 261d, which is characterized by simple assembly.

Referring to fig. 15, a movable contact guide slot 213 forming a triangle is disposed in the middle of the neutral movable contact 212, a movable contact guide post 214 inserted into the movable contact guide slot 213 and engaged with the movable contact guide slot 213 is disposed in the housing, a movable contact limiting member 219 capable of rotating is disposed on the contact guide post 214, the neutral movable contact 212 is respectively provided with a protection driving rod shaft hole and a neutral movable contact 215 corresponding to two sides of the movable contact guide slot 213, one end of the protection driving rod shaft hole and one end of the movable contact limiting member 219 are respectively rotatably sleeved on one end of a contact driving rod 2254, the other end of the contact driving rod 2254 is rotatably connected to the protection driving rod 225, the other end of the movable contact limiting member 219 is in limit fit with one side of the neutral movable contact 212 far from the neutral fixed contact 211, one end of a return spring 227 is sleeved on, the neutral pole moving contact 215 is in contact engagement with the neutral pole stationary contact 216 on the neutral pole stationary contact 211.

When the phase pole operating mechanism 14 of the circuit breaker phase pole 1 operates, the protection driving rod 225 drives the neutral pole moving contact 212 and the moving contact limiting member 219, which are sleeved on the other end of the contact driving rod 2254, to operate through the contact driving rod 2254, so that the triangular moving contact guide slot 213 of the neutral pole moving contact 212 is sleeved on the contact guide column 214 to swing, and meanwhile, the moving contact limiting member 219 rotates around the contact guide column 214 and limits the swing of the neutral pole moving contact 212. The neutral pole moving contact 212 of the present embodiment has the characteristics of small volume, simple structure and convenient processing and manufacturing, and can reduce the production cost and the assembly difficulty.

Referring to fig. 12 to 14, the structure of the protection driving rod 225 of the present embodiment is the same as that of the protection driving rod 225 of the first embodiment, one end of the protection driving rod 225 is hinged to the phase pole operating mechanism 14 of the phase pole 1 of the circuit breaker through the shaft-motor coupling driving rod 220, the other end of the protection driving rod 225 is hinged to the neutral pole moving contact 212 through the contact driving rod 2254, and when the phase pole operating mechanism 14 of the phase pole 1 of the circuit breaker operates, the neutral pole moving contact 212 is driven to operate through the protection driving rod 225.

As shown in fig. 14, the partition 32 is provided with a stopper 2250 for limiting the position of the protection driving rod 225, and the stopper 2250 is engaged with an end of the protection driving rod 225 near the neutral contact 212, and the protection driving rod 225 is prevented from occurring a dead point by the stopper 2250.

As shown in fig. 4, the structure of the electrical leakage operating mechanism 22 in the present embodiment, the electrical leakage operating mechanism 22 includes a protection lever 221 pivotally mounted in a housing, and a protection jump 222 and a protection latch 224 pivotally mounted on the protection lever 221 and in snap-fit with each other, the protection jump 222 is connected to the electrical leakage protection handle 31b through a protection link 223, the protection latch 224 is connected to the protection lever 221 through a protection spring 228, the protection spring 228 can drive the protection latch 224 to be in snap-fit with the protection jump 222 to store energy, the electrical leakage release 23 of the electrical leakage protection pole 2 can unlock the protection latch 224 and the protection jump 222 when an electrical leakage fault occurs, an unlocking lever 229 extending to one side of the protection lever 221 is provided on the phase operating mechanism 14 of the circuit breaker phase 1, and the phase operating mechanism 14 is unlocked by the unlocking lever 229 when the protection latch 224 and the protection jump 222 are unlocked.

As shown in fig. 16, the structure of the phase operating mechanism 14 of the phase 1 of the circuit breaker in the present embodiment is shown, the phase operating mechanism 14 includes a circuit breaker energy storage member, a rocker 141 pivotally mounted in the housing and connected to the movable contact 112, a phase support 140 pivotally mounted on the rocker 141, and a trip 142 and a latch 143 pivotally mounted on the phase support 140 and engaged with each other in a snap-fit manner, respectively, the trip 142 is connected to the phase handle 31a through a connecting rod 144, the phase support 140 is connected to the housing through the circuit breaker energy storage member, when the trip 142 and the latch 143 are engaged with each other in a snap-fit manner, the phase operating mechanism 14 is balanced, and when the phase handle 31a rotates in a closing direction, the movable contact 112 can be driven by the phase operating mechanism 14 to contact with the fixed contact 111, and the circuit breaker energy storage member stores; when the jump button 142 and the lock 143 release the snap fit, the energy storage element releases energy and drives the moving contact 112 to be separated from the static contact 111; an unlocking lever 229 which is matched with the leakage operating mechanism of the leakage protection electrode 2 is arranged on the lock catch 143; in this embodiment, the phase pole support 140 is connected to the protection driving rod 225 of the earth leakage protection pole 2 through the shaft-motor coupling driving rod 220, and the latch 143 is pivotally mounted on the phase pole support 140 through the shaft-motor coupling driving rod 220.

The foregoing is a more detailed description of the invention, taken in conjunction with the accompanying preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the inventive concept, and all should be considered as falling within the protection scope of the invention.

Claims

1. The utility model provides a circuit breaker, includes the casing and sets up circuit breaker looks utmost point (1) and earth leakage protection utmost point (2) in the casing both sides side by side, its characterized in that: the leakage protection pole (2) comprises a zero sequence current transformer (21), a leakage operation mechanism (22), a leakage test mechanism (25), a neutral pole static contact (211) and a neutral pole moving contact (212) which are oppositely arranged in the shell, the circuit breaker phase pole (1) comprises a phase pole operation mechanism (14), a static contact (111) and a moving contact (112) which are oppositely arranged, the moving contact (112) is connected with the phase pole operation mechanism (14), and a main loop of the circuit breaker phase pole (1) penetrates through the zero sequence current transformer (21);

the leakage test mechanism (25) comprises an elastic piece (26), a test button (29), a first contact piece (27) and a second contact piece (28) which are respectively connected to two ends of the test loop, a neutral pole moving contact (212) is connected with the leakage operating mechanism (22) or the phase pole operating mechanism (14) through a neutral line driving piece, one end of the elastic piece (26) is provided with a first contact part (261) matched with the neutral line driving piece, and the other end of the elastic piece (26) is provided with a second contact part (262) extending between the second contact piece (28) and the test button (29); the test button (29) can push the second contact part (262) to be in contact with the second contact piece (28), and the neutral line driver pushes the first contact part (261) to be in contact with the first contact piece (27) when the breaker is closed.

2. The circuit breaker of claim 1, wherein: the neutral line driving piece comprises a protection driving rod (225) and a shaft-machine coupling driving rod (220), one end of the protection driving rod (225) is connected with the neutral pole moving contact (212), and the other end of the protection driving rod (225) is hinged with the electric leakage operating mechanism (22) through the shaft-machine coupling driving rod (220); the first contact part (261) of the elastic element (26) is matched with the shaft-machine coupling driving rod (220), the shaft-machine coupling driving rod (220) pushes the first contact part (261) to be in contact with the first contact element (27), the neutral pole moving contact (212) is connected with one end of the return spring (227), and the other end of the return spring (227) is connected with the shell.

3. The circuit breaker of claim 1, wherein: the neutral line driving piece comprises a protection driving rod (225) and a shaft machine coupling driving rod (220), one end of the protection driving rod (225) is connected with the neutral pole moving contact (212), and the other end of the protection driving rod (225) is hinged with the phase pole operating mechanism (14) through the shaft machine coupling driving rod (220); a first contact part (261) of the elastic element (26) is matched with a protection driving rod (225), the protection driving rod (225) pushes the first contact part (261) to be in contact with a first contact element (27), the neutral pole moving contact (212) is connected with one end of a return spring (227), and the other end of the return spring (227) is connected with the shell.

4. The circuit breaker according to claim (2) or (3), characterized in that: the electric leakage operating mechanism (22) comprises a protection lever (221) which is pivotally installed in the shell, and a protection jump buckle (222) and a protection lock catch (224) which are respectively pivotally installed on the protection lever (221) and are in mutual hasp fit, wherein the protection jump buckle (222) is hinged to one end of a protection connecting rod (223), and the other end of the protection connecting rod (223) is hinged to a breaker handle (31).

5. The circuit breaker according to claim (2) or (3), characterized in that: one end of the return spring (227) is connected with the neutral pole moving contact (212), and the other end of the return spring is connected with the second contact element (28).

6. The circuit breaker according to claim (2) or (3), characterized in that: the elastic piece (26) is a torsion spring, the elastic piece (26) comprises a spiral part (263) connected between a first contact part (261) and a second contact part (262), the spiral part (263) is sleeved on the spring shaft (260) and connected with the shell, and the first contact part (261) and the second contact part (262) are both arranged perpendicular to the axis of the spiral part (263); the second contact member (28) is arranged on one side, close to the fixed neutral pole contact (211), of the neutral pole moving contact (212), the first contact member (27) and the elastic member (26) are arranged on one side, far away from the fixed neutral pole contact (211), of the neutral pole moving contact (212), the neutral pole moving contact (212) is connected with the second contact member (28) through a return spring (227), the second contact portion (262) penetrates through one side of the neutral pole moving contact (212) to be matched with the second contact member (28), and the first contact member (27) is connected with a test resistor (251) arranged below the first contact member (27).

7. The circuit breaker of claim 6, wherein: the first contact piece (27) and the shaft machine coupling driving rod (220) are oppositely arranged on two sides of the elastic piece (26), a V-shaped fourth contact arm (261d) is arranged on the first contact part (261), one end of the fourth contact arm (261d) inclines to one side close to the shaft machine coupling driving rod (220), and the other end of the fourth contact arm (261d) inclines to one side close to the first contact piece (27).

8. The circuit breaker of claim 2, wherein: one end of the shaft machine coupling driving rod (220) is connected with one end of the protection driving rod (225), and a shaft machine coupling driving rod through hole matched with the other end of the shaft machine coupling driving rod (220) is formed in the protection lever (221); a contact driving rod (2254) which is rotatably connected with the neutral pole moving contact (212) is arranged at the other end of the protection driving rod (225); one end of the protection driving rod (225) is arranged on the protection lever (221) in a stacking mode, and the neutral pole moving contact (212) is arranged at the other end of the protection driving rod (225) in a stacking mode.

9. The circuit breaker of claim 7, wherein: a bent contact arm (261f) bent toward the first contact (27) is provided at an end of the fourth contact arm (261d), and the outer side of the bent contact arm (261f) is in contact engagement with the first contact (27).

10. The circuit breaker of claim 6, wherein: the middle part of the neutral pole moving contact (212) is provided with a triangular moving contact guide groove (213), a moving contact guide column (214) inserted into the moving contact guide groove (213) is arranged in the shell, one end of a reset spring (227) is sleeved in the guide groove (213), and the neutral pole moving contact (212) is provided with a protection driving rod shaft hole and a neutral pole moving contact (215) respectively corresponding to two sides of the moving contact guide groove (213).