CN114005710B

CN114005710B - Leakage fault indication mechanism of circuit breaker and circuit breaker

Info

Publication number: CN114005710B
Application number: CN202010736241.8A
Authority: CN
Inventors: 张业; 安德雷斯·蒙特
Original assignee: Siemens Corp
Current assignee: Siemens Corp
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2024-12-13
Anticipated expiration: 2040-07-28
Also published as: WO2022023354A1; CN114005710A; EP4173019A1

Abstract

The invention provides an electric leakage fault indicating mechanism of a circuit breaker, which comprises an indicating piece and a driving assembly for electric leakage fault protection. The indicator is rotatably connected to the housing, and a first reset elastic element is connected between the indicator and the housing. The drive assembly is arranged in the shell, and can be switched to a closed and locked state under the drive of the handle. When the electric leakage fault occurs, the push rod of the electric leakage fault release unlocks the driving assembly, so that the action connecting rod breaks the circuit breaker under the driving of the driving assembly, and the indicating piece rotates and indicates the electric leakage fault under the driving of the first reset elastic element. The leakage fault indicating mechanism is completely independent of the switching function of the circuit breaker, can be used as an independent unit of the circuit breaker, and has good independence and high reliability. The invention also provides a circuit breaker with the leakage fault indicating mechanism.

Description

Leakage fault indicating mechanism of circuit breaker and circuit breaker

Technical Field

The invention relates to the field of low-voltage electricity, in particular to a leakage fault indicating mechanism of a circuit breaker and the circuit breaker.

Background

The residual current circuit breaker (RCBO) product not only has the overload and short-circuit protection functions of a common miniature circuit breaker, but also has the residual current protection function aiming at personal life safety. However, with existing residual current circuit breaker products, whatever fault occurs, the circuit breaker product trips. If a customer cannot distinguish the specific fault type causing the trip according to the appearance of the residual current circuit breaker, a potential safety hazard exists. In particular, when life-threatening leakage faults occur, if the switch is closed fraudulently, there is a potential life safety hazard. For this purpose, a leakage fault indicating mechanism needs to be arranged on the product to indicate the fault type. However, the existing leakage fault indication mechanisms are mostly complex, and bring great inconvenience to production and assembly.

Disclosure of Invention

The invention aims to provide a leakage fault indicating mechanism of a circuit breaker, which can indicate when a leakage fault occurs, and has the advantages of simple structure and convenience in production and assembly.

Another object of the present invention is to provide a circuit breaker with the leakage fault indication mechanism, which not only can indicate whether a leakage fault occurs for a user, but also has a simple structure and is easy to produce and assemble.

The invention provides an electric leakage fault indicating mechanism of a circuit breaker, which comprises a shell and a handle rotatably connected with the shell. The shell comprises an electric leakage fault release and an action connecting rod. The leakage fault indicating mechanism of the circuit breaker comprises an indicating piece and a driving assembly for leakage fault protection. The indicator is rotatably connected to the housing, and a first reset elastic element is connected between the indicator and the housing. The driving assembly is arranged in the shell, and can be switched to a closed and locked state under the driving of the handle. When an electric leakage fault occurs, the push rod of the electric leakage fault release unlocks the driving assembly, so that the action connecting rod is driven by the driving assembly to disconnect the circuit breaker, and the indicator rotates and indicates the electric leakage fault under the driving of the first reset elastic element. The leakage fault indicating mechanism is completely independent of the switching function of the circuit breaker, does not act due to normal action or overload and short-circuit protection action of the circuit breaker, has good independence, can transmit error fault information to a user without misoperation, and has high reliability and safety. In addition, because the leakage fault indicator is completely independent of the switching function of the circuit breaker, the leakage fault indicator can be made into an independent unit of the circuit breaker, and a user can decide whether to select the circuit breaker, so that the aim of reducing the cost is achieved.

In another exemplary embodiment of the leakage fault indication mechanism of the circuit interrupter, the indicator includes an indicator body and a connector. The indicator body is provided with an indication area. The connecting part extends along the axial direction of the indicator body and is used for connecting the handle. Under the drive of the handle, the connecting part can rotate from a first initial position to a first locking position, and under the action of the first reset elastic element, the connecting part can return to the first initial position from the first locking position.

In yet another exemplary embodiment of the leakage fault indication mechanism of the circuit breaker, the connection portion returns to the first initial position when a leakage fault occurs, and the indication area is at least partially exposed outside the housing.

In yet another exemplary embodiment of the leakage fault indication mechanism of the circuit breaker, the handle is provided with a receiving slot. The connecting part stretches into the accommodating groove and can slide in the accommodating groove.

In still another exemplary embodiment of the leakage fault indication mechanism of the circuit breaker, an inner wall of one side of the accommodating groove is a driving surface, and the driving surface can push the connection part to rotate.

In yet another exemplary embodiment of the leakage fault indication mechanism of the circuit breaker, the circuit breaker further comprises a mounting housing, and the indication member and the handle are assembled to the mounting housing and bridge across both sides of the mounting housing, so that the circuit breaker can be assembled conveniently.

In yet another exemplary embodiment of the leakage fault indication mechanism of the circuit interrupter, the drive assembly includes a trip, a drive rod, a latch rod, an energy storage rod, and a coupling rod. The jump button comprises a jump button body and a jump button arm. The two ends of the driving rod are respectively and rotatably connected with the indicating piece and the jump buckle body. The locking rod is pivoted with the shell. And a second reset elastic element is connected between the energy storage rod and the shell. And two ends of the coupling rod are respectively and rotatably connected with the jump buckle body and the energy storage rod. Such a drive assembly has a high reliability.

In a further exemplary embodiment of the leakage fault indication mechanism of the circuit breaker, a third return spring element is connected between the latching lever and the housing.

In yet another exemplary embodiment of the leakage fault indication mechanism of the circuit interrupter, upon actuation of the indicator, the trip buckle moves from a second initial position to a second locked position and actuates the energy storage lever to compress the second return spring element.

In yet another exemplary embodiment of the leakage fault indication mechanism of the circuit breaker, the latching lever is capable of locking the trip, and the energy storage lever is capable of driving the trip to rotate after the push rod pushes the latching lever to disengage from the trip.

In yet another exemplary embodiment of the leakage fault indication mechanism of the circuit breaker, the trip body has a boss. The actuating link includes a drive arm having a flange. After the lock catch rod is separated from the jump buckle, when the energy storage rod drives the jump buckle to rotate, the boss can act on the flange and drive the action connecting rod to move, so that the electric leakage fault indicating mechanism can be used for indicating electric leakage faults, and meanwhile, the operating mechanism of the circuit breaker can be unlocked, and safety is improved.

In yet another exemplary embodiment of the leakage fault indication mechanism of the circuit interrupter, the trip arm has a relief groove. When the driving assembly is in a closed and locked state, the flange can pass through the avoidance groove when the action connecting rod acts so as to ensure that the electric leakage fault indicating mechanism is independent of the operating mechanism of the circuit breaker when the circuit breaker is in overload and short-circuit protection action.

In yet another exemplary embodiment of the leakage fault indication mechanism of the circuit breaker, the action linkage further comprises a linkage arm, the driving arm and the linkage arm being located in different chambers of the module, respectively, the linkage arm being capable of unlocking the operating mechanism of the circuit breaker.

In yet another exemplary embodiment of the leakage fault indication mechanism of the circuit breaker, the housing further comprises a linkage for connecting to another module of the circuit breaker, the linkage being connected to the action link and being rotatable under the drive of the action link.

The invention provides a circuit breaker, which comprises the leakage fault indicating mechanism of the circuit breaker. The leakage fault indication mechanism is completely independent of the switching function of the circuit breaker, does not act due to normal action or overload and short-circuit protection action of the circuit breaker, has good independence, can transmit error fault information to a user without misoperation, and has high reliability and safety. In addition, the switch function of the circuit breaker is completely independent, so that the circuit breaker is convenient to generate and assemble.

Drawings

The above and other features and advantages of the present invention will become more apparent to those of ordinary skill in the art by describing in detail preferred embodiments thereof with reference to the attached drawings in which:

fig. 1 is a schematic structural view of a circuit breaker having an earth leakage fault indication mechanism according to an embodiment of the present invention;

FIG. 2 is a schematic view of a leakage fault indication mechanism according to an embodiment of the present invention;

FIG. 3 is an exploded view of the leakage fault indication mechanism of FIG. 2;

FIG. 4 is a partially exploded view of the leakage fault indication mechanism of FIG. 2;

FIG. 5 is an enlarged partial view of region M of FIG. 2;

FIG. 6 is a schematic structural view of the jump button in FIG. 2;

FIG. 7 is a schematic view of the motion link of FIG. 2;

fig. 8 and 9 are views for explaining a closing process of the circuit breaker;

fig. 10 is a schematic structural view of a leakage fault indication mechanism when the circuit breaker of the present invention is normally opened;

fig. 11 is a schematic structural view of a leakage fault indication mechanism when the circuit breaker of the present invention is opened due to overload and short-circuit fault;

Fig. 12 is a schematic structural view of a leakage fault indication mechanism when the circuit breaker of the present invention unlocks a driving assembly due to a leakage fault;

fig. 13 is a schematic view of the structure of the L pole of the circuit breaker of fig. 1;

FIG. 14 is an exploded view of the L pole of FIG. 13;

FIG. 15 is a schematic view of the handle of FIG. 13;

FIG. 16 is a schematic view of the arcuate link of FIG. 13;

FIG. 17 is a schematic structural view of the common release member of FIG. 13;

fig. 18 is a schematic structural diagram of an L pole when the circuit breaker of the present invention is closed;

Fig. 19 is a schematic view of the structure of the L pole in fig. 13 when the L pole is unlocked by the operation of the circuit breaker protection function.

Wherein, the reference numerals are as follows:

100. shell 310 push rod

110. Mounting housing 400 indicator

111. Indicator body of locating pin 410

112. Guide slot 411 indicates an area

113. Support 420 connection

200. Handle 430 first return elastic element

210. Handle body 500 drive assembly

211. Storage groove 510 jumping buckle

2111. Driving surface 511 jump arm

220. Fourth reset elastic element 5111 avoiding groove

300. Leakage fault release 512 trip buckle body

5121. Second bending part of boss 723

520. Second connecting end of driving rod 724

530. Lock catch lever 730 lock catch lever

531. Third reset elastic element 740 moving contact assembly

540. Pressure spring of energy storage rod 741

541. Second reset elastic element 750 coupling rod

550. Coupling bar 760 handle

610. Handle hole of action link 761

611. Actuating arm 762 return spring mounting cavity

6111. Limiting guide 763 reset spring

6112. Flange 764 limit part

612. Static contact assembly of linkage arm 800

620 Linkage 900 shares a trip

710. Trip 910 trip piece connecting groove

720. Arc-shaped connecting rod 920 trip driving arm

721. First connecting end 921 trip collision boss

722. First bending part 930 trip connecting pin

Detailed Description

For a clearer understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals refer to identical or structurally similar but functionally identical components throughout the separate views.

In this document, "schematic" means "serving as an example, instance, or illustration," and any illustrations, embodiments described herein as "schematic" should not be construed as a more preferred or advantageous solution.

For the sake of simplicity of the drawing, the parts relevant to the present invention are shown only schematically in the figures, which do not represent the actual structure thereof as a product. In addition, for simplicity and ease of understanding, components having the same structure or function in some of the figures are shown schematically only one of them, or only one of them is labeled.

Herein, "a" means not only "only this one" but also "more than one" case. Herein, "first", "second", etc. do not indicate the degree of importance or order thereof, etc., but merely indicate distinction from each other to facilitate description of documents. Herein, "modulus" is used to denote the width of a circuit breaker. Typically, one modulus is 18mm.

Referring to fig. 1, a schematic diagram of an exemplary embodiment of a circuit breaker with an electrical leakage fault indication mechanism of the present invention is shown. The circuit breaker 10 comprises two modules 11, 12. Wherein the first chamber of the first module 11 is provided with an electric leakage fault indication mechanism and the second chamber is provided with an operating mechanism. The user can analyze whether or not the leakage fault has occurred through the indicator 400 of the leakage fault indicating mechanism thereof. The number of modules of the circuit breaker of the present invention may be greater than two. The operating mechanism of the circuit breaker comprises a contact assembly and an actuating assembly. The operating mechanism can control the contact and separation of the contact to realize the breaking and the switching-on of the current loop. The first module 11 and the second module 12 shown in fig. 1 are each one module width.

Referring to fig. 2, a schematic structural diagram of one embodiment of the leakage fault indication mechanism within the first module 11 of fig. 1 is shown. The first module 11 includes a housing 100, a handle 200, an electrical leakage fault indicating mechanism including an indicator 400 and a drive assembly 500 for electrical leakage fault protection, an electrical leakage fault release 300, and an action linkage 610.

The handle 200 and the indicator 400 are rotatably connected to the housing 100, respectively. The leakage fault release 300, the action link 610, and the drive assembly 500 are disposed within the housing 100. A first return elastic element 430 is also connected between the indicator 400 and the housing 100.

When the user manually closes the first module 11, the drive assembly 500 can be switched to the closed and locked state under the drive of the handle 200. When an electric leakage fault occurs, the push rod 310 of the electric leakage fault release 300 unlocks the driving assembly 500, so that the action link 610 opens the circuit breaker under the driving of the driving assembly 500, the handle 200 is reset, and the indicator 400 rotates and indicates the electric leakage fault under the driving of the first reset elastic element 430. The first return elastic member 430 may be a spring.

The leakage fault indication mechanism of the embodiment is completely independent of the switching function of the circuit breaker. Specifically, the leakage fault indication mechanism is initially closed along with the closing of the handle 200, then, the leakage fault indication mechanism does not move along with the normal open and close operation of the handle 200, and does not move along with the overload of the circuit breaker and the tripping action of the overcurrent protection function, the driving assembly 500 of the leakage fault indication mechanism is unlocked by the push rod 310 of the leakage fault release only when the leakage fault which jeopardizes the personal safety occurs, and the indication piece 400 is always kept in the fault indication state until the user definitely and after the fault is removed, the handle of the circuit breaker is closed again manually, and then the fault display is canceled.

In an alternative embodiment, the housing 100 further includes a linkage 620 for connecting to another module of the circuit breaker, and the linkage 620 is connected to the actuating link 610 and can be rotated by the actuating link 610.

Referring to fig. 3, an exploded view of the leakage fault indication mechanism of fig. 2 is shown. The drive assembly 500 includes a trip 510, a drive rod 520, a latch rod 530, an energy storage rod 540, and a coupling rod 550.

Referring to fig. 5, an enlarged partial view of the region M of fig. 2 is shown. The trip button 510 includes a trip button body 512 and a trip button arm 511 (see fig. 6). Both ends of the driving lever 520 are rotatably coupled to the indication member 400 and the trip button body 512, respectively. One end of the driving rod 520 extends into the guide groove 112, and the trip buckle body 512 can move along the guide groove 112 under the action of the driving rod 520. The latch lever 530 is pivotally connected to the housing 100, and one end thereof can abut against and lock the latch arm 511. A third restoring elastic member 531 may be further connected between the latch lever 530 and the housing 100. A second restoring elastic element 541 is connected between the energy storage lever 540 and the housing 100. Both ends of the coupling rod 550 are rotatably connected to the trip body 512 and the energy storage rod 540, respectively. When the trip buckle body 512 moves along the guide groove 112 to the second locking position, the energy storage rod 540 can compress the second reset elastic element 541 to store energy. The second and third return elastic elements 541 and 531 may be springs.

Referring to fig. 4, a partially exploded view of the leakage fault indication mechanism of fig. 2 is shown. The indicator 400 includes an indicator body 410 and a connecting portion 420. The indicator body 410 is provided with an indicator area 411. The connection part 420 extends in the axial direction of the indicator body 410, and is used to connect the handle 200. Specifically, the connection part 420 can be rotated from the first initial position to the first locking position by the driving of the handle 200. The connecting portion 420 in fig. 4 is located at the first initial position. When an electrical leakage fault occurs, the connection portion 420 can return to the first initial position from the first locking position under the action of the first return elastic element 430, and the indication area 411 is at least partially exposed out of the housing 100, for example, the indication area 411 shown in fig. 4 is completely exposed out of the housing 100. The indication area 411 may be of a special color, a special mark, or a transparent material.

In an alternative embodiment, the body of the handle 200 is provided with a receiving groove 211. The connection part 420 can extend into the accommodating groove 211 and can slide in the accommodating groove 211. An inner wall of one side of the receiving groove 211 may be provided as a driving surface 2111 with reference to fig. 4, and the handle 200 pushes the connection part 420 to rotate through the driving surface 2111. Specifically, the body of the handle 200 may have a half module width, and the accommodating groove 211 may have a circular shape.

In another alternative embodiment, the first module 11 further includes a mounting housing 110. As shown in fig. 4, the indicator 400 and the handle 200 may be respectively assembled to the two positioning pins 111 of the mounting housing 110 and bridge both sides of the mounting housing 110. After assembly, the connection part 420 passes through the arc-shaped groove of the mounting housing 110 and protrudes into the receiving groove 211.

Referring to fig. 6, a schematic structural diagram of the trip buckle in fig. 2 is shown. The trip button 510 includes a trip button body 512 and a trip button arm 511. Referring to fig. 7, a schematic diagram of the motion link of fig. 2 is shown. When an electric leakage fault occurs, the trip buckle 510 can collide with the action connecting rod 610, and the trip buckle 510 drives the action connecting rod 610 to move. When a user manually closes the circuit breaker or the circuit breaker is tripped due to overload and overcurrent protection, the trip link 610 can avoid the trip buckle 510 and the latch lever 530 when moving.

In an alternative embodiment, the snap body 512 has a boss 5121 thereon. The actuating link 610 includes a drive arm 611 with a flange 6112 on the drive arm 611. After the latch lever 530 is disengaged from the trip buckle 510, the boss 5121 can act on the flange 6112 and drive the action link 610 to move when the energy storage lever 540 drives the trip buckle 510 to rotate. The embodiment can ensure that the electric leakage fault indicating mechanism can not only indicate electric leakage faults, but also unlock the operating mechanism of the circuit breaker so as to improve safety.

In an alternative embodiment, the trip arm 510 is further provided with a relief groove 5111. When the actuation link 610 is actuated with the drive assembly 500 in the closed and locked state, the flange 6112 of the drive arm 611 can pass through the escape groove 5111.

The action link 610 may also include a linkage arm 612. The driving arm 611 and the linkage arm 612 are respectively located in different chambers of the module, and the linkage arm 612 can unlock an operating mechanism of the chamber in which the linkage arm is located to open the circuit breaker. The operation link 610 can realize a cooperative operation when a breaker failure or a leakage failure occurs.

The closing process of the circuit breaker will now be described with reference to fig. 8 and 9. In fig. 8, the handle 200 and the indicator 400 are both in an initial state, the connecting portion 420 of the indicator 400 is located at a first initial position, the indication area 411 is exposed out of the housing 100, and the jump button 510 is located at a second initial position. In fig. 9, the handle 200 is in a closed state. The connecting portion 420 of the indicator 400 is located at the first locking position, the indicating area 411 is hidden inside the housing 100, and the trip buckle 510 is located at the second locking position.

When the user manually closes the handle 200 of the circuit breaker, the receiving groove 211 of the handle 200 pushes the connection part 430 of the indicator 400 to rotate, thereby enabling the leakage fault indication mechanism of the present invention to perform a closing operation. The trip button 510 moves along the guide groove 112 by the driving lever 520. The energy storage rod 540 compresses the second restoring elastic element 541 to store energy by using the contact surface of the supporting member 113 as a supporting point under the driving of the coupling rod 550. When the connecting portion 420 is rotated to the first locking position, the indication area 411 is hidden inside the circuit breaker, i.e. shows a non-leakage fault state to the user, and the trip buckle 510 is moved to the second locking position, and the trip buckle arm 511 of the trip buckle 510 abuts against the latch buckle lever 530. At this time, the driving assembly 500 is in the closed and locked state.

Referring to fig. 10, a schematic structural diagram of a leakage fault indication mechanism of the circuit breaker according to the present invention is shown. In fig. 10, the handle 200 is returned to the original state, the indicator 400 remains in the closed state, and the connecting portion 420 thereof remains in the first locking position.

The normal opening process of the circuit breaker will now be described with reference to fig. 9 and 10. When the circuit breaker is opened and closed in normal use, the states of the driving assembly 500 and the action link 610 are not changed, and the handle 200 is rotated and returned from the closed state to the initial state. Because the accommodating groove 211 of the handle 200 has enough space, the opening and closing operation has no influence on the leakage fault indication mechanism. The indicator 400 does not rotate due to the rotation of the handle 200, and the indication area 411 of the indicator 400 is still hidden inside the housing 100.

Referring to fig. 11, a schematic structural diagram of a leakage fault indication mechanism when the circuit breaker of the present invention is opened due to overload and short-circuit fault is shown. In fig. 11, the handle 200 is returned to the original state, the indicator 400 remains in the closed state, and the connecting portion 420 thereof remains in the first locking position.

The process of opening the circuit breaker due to overload and short-circuit fault will now be described with reference to fig. 9 and 11. When the circuit breaker is opened by overload or short-circuit fault, the position of the operation link 610 is changed, and the end of the driving arm 611 moves downward along the direction of the guide groove 112. Since the escape groove 5111 is provided in the trip arm 511, the flange 6112 of the driving arm 611 can pass through the escape groove 5111. The limit guide 6111 of the driving arm 611 can smoothly avoid the trip arm 511 and the latch lever 530 and pass through the lower side thereof. Thus, movement from the action link 610 cannot interfere with the leakage fault indication mechanism of the present invention, which remains in the closed and locked state. This ensures that the leakage fault indication mechanism is independent of the circuit breaker operating mechanism.

Referring to fig. 12, a schematic diagram of a leakage fault indicating mechanism of the circuit breaker according to the present invention is shown when the driving assembly is unlocked due to a leakage fault. The process of opening the circuit breaker due to the leakage fault will now be described with reference to fig. 9, 12 and 8. When the circuit breaker is opened due to the leakage fault, the push rod 310 of the leakage fault release 300 releases the ejection. After the push rod 310 pushes the latch lever 530 to rotate, the latch arm 511 is disengaged from the latch lever 530. Thus, the trip button 510 is unlocked. The energy storage lever 540 and the coupling lever 550 are rapidly moved by the second restoring elastic member 541. At this time, the indicator 400 is not rotated yet, and the trip 510 is rotated rapidly about one end of the driving lever 520. During movement, the boss 5121 of the trip body 512 impacts the flange 6112 of the action link 610, causing the action link 610 to interlock, further unlocking the operating mechanism of the circuit breaker, causing the entire circuit breaker to open. The whole movement process is shown in figures 9, 12 and 8 in turn. The handle 200 and the indicator 400 are rotated to return to the original state by the fourth return elastic element 220 and the first return elastic element 430, respectively. At this time, the indication area 411 hidden inside the housing 100 is exposed to the housing 100 to inform the user that the leakage fault occurs. After the user clears the trouble and closes the handle 200 again, the leakage trouble indication mechanism is switched from the state shown in fig. 8 to the state shown in fig. 9. The fourth return elastic element 220 may be a spring.

Therefore, when the breaker handle 200 is closed, the leakage fault indication mechanism can be driven to carry out reset switching-on operation, and then the handle 200 is separated from the leakage fault indication mechanism to ensure the stability of the fault indication mechanism, and when the leakage fault occurs, the driving assembly 500 can actively collide with the action connecting rod 610 to act, so that the whole product is released to be disconnected. To achieve the cooperative action with the existing mechanism of the circuit breaker.

The invention also provides a circuit breaker which comprises the electric leakage fault indicating mechanism of any embodiment. The circuit breaker has high reliability and safety.

In general, a multi-pole standard-sized residual current circuit breaker is designed based on the layout of a compact 1PN product.

Compact 1PN circuit breaker products, which generally have an L pole operating mechanism and an N pole operating mechanism, adopt an L/N integral type or an L/N split type. In any mode, the operation of the device is driven by the same handle and the connecting rod, so that the L pole and the N pole are synchronously opened and closed, and the connecting rod and the main mechanism parts are not assembled on the same side of the product.

In a multipole circuit breaker product, only an L-pole operating mechanism is required for either pole. Therefore, it is necessary to optimize the existing operating mechanism based on the compact type 1PN breaker product, so as to save space as much as possible, to achieve the purposes of satisfying product performance, integrating various electronic control functions, and improving assembly efficiency.

In the concrete implementation, the existing design adopts the following two modes, (1) in a compact space (about 1.5 modules), an operating mechanism of a circuit breaker is driven by the same handle and a connecting rod to control the opening and closing of two L poles, one set of mechanism of the mode still controls the opening and closing of two contacts, the flexibility is insufficient, and (2) a monopole operating mechanism controls the monopole contacts to open and close, and the overall size of an arc extinguishing system is reduced by half to place a leakage functional component, so that the breaking performance of a product can be sacrificed. In addition to the above two modes, the present invention also provides a new design scheme, and the following description will refer to fig. 13 to 19.

Referring to fig. 13, a schematic diagram of one embodiment of the L-pole of the circuit breaker of fig. 1 is shown. Specifically, the L poles of the first module 11 and the second module 12 may each employ such a structure.

In this embodiment, the L-pole operating mechanism employs an arcuate link 720. The operating mechanism can realize the contact and disconnection of the moving contact assembly and the fixed contact assembly, and the connection with an external accessory can realize the switch control or signal transmission. The novel plastic composite material has the advantages of small occupied space (half module), low cost and convenient assembly.

Referring to fig. 14, an exploded view of the L pole structure of fig. 13 is shown. The second module 12 includes a housing, a handle 760, an arcuate link 720, a trip 710, a coupling lever 750, a latch lever 730, a common trip 900, contact assemblies 740, and stationary contact assemblies 800.

The handle 760 and the common release member 900 are rotatably coupled to the housing, respectively. The arcuate link 720, the trip buckle 710, the latch lever 730, the moving contact assembly 740, and the coupling lever 750 are disposed within the housing. The latch lever 730 is pivotally coupled to the housing. A return spring 763 is connected between the handle 760 and the housing, and the handle 760 has a width of one half module (the entire module width can be used as desired). A pressure spring 741 is connected between the movable contact assembly 740 and the housing.

Referring to fig. 15, a schematic view of the handle of fig. 13 is shown. The handle 760 is provided with a handle hole 761, a return spring mounting cavity 762, and a limiting portion 764. Handle hole 761 is used to connect one end of arcuate link 720. The return spring mounting cavity 762 is used to mount a return spring 763. The limiting portion 764 is used to limit the rotation of the return spring 763.

Referring to fig. 16, a schematic view of the arcuate link of fig. 13 is shown. The arcuate link 720 includes a first connecting end 721, a first bend 722, a second bend 723, and a second connecting end 724. Wherein, the first connecting end 721 is connected to the handle 760, and the second connecting end 724 is connected to the jump buckle 710. A bending angle is formed between the first bending portion 722 and the second bending portion 723. Referring to fig. 19, the provision of an inflection angle on arcuate link 720 enables arcuate link 720 to avoid coupling rod 750 during movement. In addition, a plurality of bending angles may be provided between the first connection end 721 and the second connection end 724 as needed. The provision of multiple angles of inflection further ensures that arcuate link 720 avoids coupling rod 750 during movement.

Referring to fig. 17, a schematic structural diagram of the common release member in fig. 13 is shown. The common release 900 includes a common release body and a release drive arm 920. The two ends of the common trip member main body are respectively provided with a trip member connecting slot 910 and a trip member connecting pin 930, and the end of the trip member driving arm 920 is provided with a trip member collision boss 921. The common trip unit 900 can realize trip control of adjacent poles when the poles are spliced (or spliced with external accessories).

When the multipolar product is automatically disconnected by the action of the protection function, the common release member 900 is required. The trip link pin 930 of the common trip member 900 is connected with the trip link groove of another common trip member. During rotation, the trip 710 will strike the trip impact boss 921 of the trip drive arm 920 to drive the common trip 900 into a rotational motion that will drive the common trip of the other poles through the trip link pin 930. In the operating mechanisms of other poles, the common piece driving arm pushes the locking rod to rotate, so as to unlock the operating mechanism of the corresponding pole and break contact of the contact.

The normal closing process and opening process of the L-pole operating mechanism will now be described with reference to fig. 13 and 18.

Fig. 13 shows an initial state of the user before closing the L-pole operating mechanism, and in the state shown in fig. 13, the user pushes the handle 760 to rotate counterclockwise. The second link 724 of the arcuate link 720 is driven downward along a guide slot in the housing by the handle 760. In the process that the jump button 710 moves downward along the second connection end 724, firstly, the jump button arm of the jump button 710 contacts one end of the lock catch lever 730 and is locked by the lock catch lever 730, then, the jump button 710 drives the moving contact assembly 740 to move through the coupling lever 750 until the moving contact assembly 740 contacts the fixed contact assembly 800, and the closing operation is completed, at this time, the L-pole operating mechanism is as shown in fig. 18.

Fig. 18 shows a schematic structural diagram of the L pole when the circuit breaker is closed. When the user needs to turn off the L-pole operating mechanism, the user pushes the handle 760 to rotate clockwise in the state shown in fig. 18. The handle 760 drives the arcuate link 720 to move upward along the guide slot on the housing, and the moving contact assembly 740 is rapidly separated from the fixed contact assembly 800 under the drive of the pressure spring 741 until the moving contact assembly 740 collides with the limiting portion of the housing. At the same time, the trip 710 and the coupling lever 750 are reset, completing the disconnection operation.

Referring to fig. 19, a schematic diagram of the structure of the L pole in fig. 13 when the L pole is unlocked due to the action of the circuit breaker protection function is shown. The process of the L-pole operating mechanism in which the protection function is turned off will now be described with reference to fig. 18, 19, and 13.

When the circuit breaker product is disconnected due to the action of the protection function (such as overload, overcurrent, etc.), the actuator of the thermal system or the magnetic system pushes or pulls the latch lever 730 to rotate, the latch lever 730 moves away from the contact position with the latch 710, and the latch arm of the latch 710 loses the support of the latch lever 730 to unlock the operating mechanism. Under the action of the pressure spring 741, the movable contact assembly 740 and the coupling rod 750 are quickly moved to reset. At this point, the handle 760 is still in the closed position, yet unreactive. The trip button 710 is rotated rapidly about the second link end 724 of the arcuate link 720 and moves to a limit feature of the housing. The arcuate feature of the arcuate link 720 can better avoid the boss feature of the trip buckle 710, and the bent angle of the arcuate link 720 can avoid the coupling lever 750, thereby enabling the trip process to be smoothly completed. Thereafter, the handle 760 and the trip 510 are returned to the off position by the return spring 763.

In the implementation mode, a single operating mechanism only controls a single contact, can be more flexibly applied to various types of products (such AS 2P/3P/4P), and has small occupied space, and occupies only half of the module to which the operating mechanism belongs, and the other half of the module space can be used for (1) the functions of an Auxiliary Switch (AS) or a fault indication (FC) can be realized if a set of mechanism is assembled, and (2) a plurality of other control functions (such AS communication, remote control, automatic reclosing and the like) can be realized if a set of electronic components is assembled. The novel operating mechanism can optimize the assembly process, realize single-side assembly of all parts and save the production cost. Or in a single modulus range, the other half of the corresponding space can be assembled with a complete independent operating mechanism, so that a two-pole product can be controlled by two handles.

It should be understood that although the present disclosure has been described in terms of various embodiments, not every embodiment is provided with a separate technical solution, and this description is for clarity only, and those skilled in the art should consider the disclosure as a whole, and the technical solutions in the various embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.

The above list of detailed descriptions is only specific to practical examples of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications, such as combinations, divisions or repetitions of features, without departing from the technical spirit of the present invention are included in the scope of the present invention.

Claims

1. The utility model provides a leakage fault indicating mechanism of circuit breaker, the circuit breaker include a casing (100) and a rotatable connect in handle (200) of casing (100), be provided with a holding groove (211) on handle (200), including a leakage fault release (300) and an action connecting rod (610) in casing (100), its characterized in that, leakage fault indicating mechanism of circuit breaker includes:

an indicator (400) rotatably connected to the housing (100), a first return elastic element (430) being connected between the indicator (400) and the housing (100), the indicator (400) comprising an indicator body (410) and a connecting portion (420), the connecting portion (420) extending into the accommodating groove (211) and being capable of sliding in the accommodating groove (211);

a drive assembly (500) for leakage fault protection, disposed within the housing (100), the drive assembly (500) being switchable to a closed and locked state upon actuation of the handle (200), the drive assembly (500) comprising:

A trip button (510) comprising a trip button body (512) and a trip button arm (511), said trip button (510) being movable from a second initial position to a second locked position upon actuation of said indicator (400), said actuation assembly (500) being in a closed and locked state when said trip button (510) is in said second locked position;

a latch lever (530) pivotally connected to the housing (100), the latch lever (530) being capable of locking the latch (510), and

A driving rod (520) with two ends rotatably connected to the indicator (400) and the trip button body (512), respectively;

When an electric leakage fault occurs, the push rod (310) of the electric leakage fault release (300) unlocks the driving assembly (500), so that the action connecting rod (610) opens the circuit breaker under the driving of the driving assembly (500), and the indicator (400) rotates and indicates the electric leakage fault under the driving of the first reset elastic element (430).

2. The leakage fault indication mechanism of a circuit interrupter according to claim 1, wherein:

The indicator body (410) is provided with an indication area (411);

The connecting part (420) extends along the axial direction of the indicator body (410), and the connecting part (420) is used for connecting the handle (200);

The connecting part (420) can rotate from a first initial position to a first locking position under the driving of the handle (200), and the connecting part (420) can return to the first initial position from the first locking position under the action of the first reset elastic element (430).

3. The leakage fault indication mechanism of the circuit breaker according to claim 2, wherein the connection portion (420) returns to the first initial position when a leakage fault occurs, and the indication area (411) is at least partially exposed outside the housing (100).

4. The leakage fault indication mechanism of the circuit breaker according to claim 1, wherein an inner wall of one side of the accommodating groove (211) is a driving surface (2111), and the driving surface (2111) can push the connecting portion (420) to rotate.

5. The leakage fault indication mechanism of the circuit breaker according to claim 1, further comprising a mounting housing (110), wherein the indicator (400) and the handle (200) are assembled to the mounting housing (110) and bridge across both sides of the mounting housing (110).

6. The leakage fault indication mechanism of the circuit breaker according to claim 1, wherein the drive assembly (500) further comprises:

An energy storage lever (540) connected to the housing (100) with a second return elastic element (541), and

And the two ends of the coupling rod (550) are respectively and rotatably connected with the jump buckle body (512) and the energy storage rod (540).

7. The leakage fault indication mechanism of the circuit breaker according to claim 6, wherein a third reset elastic element (531) is connected between the latch lever (530) and the housing (100).

8. The leakage fault indication mechanism of the circuit breaker according to claim 6, wherein the trip button (510) drives the energy storage lever (540) to compress the second reset elastic element (541) under the driving of the indication member (400).

9. The leakage fault indication mechanism of a circuit breaker of claim 8, wherein:

After the push rod (310) pushes the locking rod (530) to be separated from the jump buckle (510), the energy storage rod (540) can drive the jump buckle (510) to rotate.

10. The leakage fault indication mechanism of a circuit interrupter as defined in claim 6, wherein:

the jump button body (512) is provided with a boss (5121);

The actuating link (610) comprises a drive arm (611), the drive arm (611) having a flange (6112);

After the locking rod (530) is separated from the jump buckle (510), when the energy storage rod (540) drives the jump buckle (510) to rotate, the boss (5121) can act on the flange (6112) and drive the action connecting rod (610) to move.

11. The leakage fault indication mechanism of a circuit breaker of claim 10, wherein:

the trip arm (511) is provided with an avoidance groove (5111);

when the actuating link (610) is actuated in the closed and locked state of the drive assembly (500), the flange (6112) can pass through the escape groove (5111).

12. The leakage fault indication mechanism of the circuit breaker according to claim 10, wherein the action link (610) further comprises a linkage arm (612), the driving arm (611) and the linkage arm (612) are respectively located in different chambers of the module, and the linkage arm (612) is capable of unlocking the operation mechanism of the circuit breaker.

13. The leakage fault indication mechanism of a circuit breaker according to claim 1, wherein said housing (100) further comprises an actuator (620) for connecting to another module of said circuit breaker, said actuator (620) being coupled to said actuating link (610) and being rotatable under the actuation of said actuating link (610).

14. Circuit breaker, characterized in that it comprises a leakage fault indication mechanism of the circuit breaker according to any of claims 1-13.