CN218677005U

CN218677005U - Circuit breaker with magnetic protection mechanism

Info

Publication number: CN218677005U
Application number: CN202223108586.2U
Authority: CN
Inventors: 叶献东; 王志勇; 万逸群; 张跃; 王丽
Original assignee: Fato Mechanical And Electrical Co ltd
Current assignee: Fato Mechanical And Electrical Co ltd
Priority date: 2022-11-21
Filing date: 2022-11-21
Publication date: 2023-03-21
Anticipated expiration: 2032-11-21

Abstract

The utility model belongs to the low-voltage switch field, concretely relates to circuit breaker with magnetism protection mechanism, including the circuit breaker casing, operating device, the moving contact, the static contact, magnetism protection mechanism includes static armature, move the armature, the elastic component resets, static armature laminating static contact sets up to be fixed in the circuit breaker casing, static armature, move and connect through articulated shaft is articulated between the armature, the elastic component that resets forms to keeping away from static armature direction pivoted effort of resetting with moving armature, it makes it to static armature direction pivoted in-process can make the relative static contact disconnection action of moving contact that is located the closed position to move armature and operating device or moving contact cooperation. The utility model discloses compare other conventional circuit breakers, cancel the coil, but reduce cost compares the magnetism protection mechanism among the prior art, the utility model discloses a quiet armature with move the articulated back of connecting of armature, but direct mount on shells inner wall, and save welding processes between the contact, simple structure, the temperature rise is low, divides disconnected reliably.

Description

Circuit breaker with magnetic protection mechanism

Technical Field

The utility model belongs to the low-voltage switch field, concretely relates to circuit breaker with magnetism protection mechanism.

Background

The types of circuit breaker tripping can be divided into four types: electromagnetic tripping, thermomagnetic tripping, electronic tripping, shunt tripping. Wherein the thermomagnetic trip provides thermal and magnetic protection. The thermal protection is also called overload protection, and drives the tripping mechanism to act according to the principle that the bimetallic strip is deformed by heating, and when the bimetallic strip is deformed to a certain degree, the tripping mechanism acts to cut off the circuit. The magnetic protection is namely short-circuit protection (instant), the magnetic protection in the molded case circuit breaker is structurally characterized in that a magnetic field is generated by matching an electrified conductor with a ferromagnetic plate-shaped static armature through the principle of electromagnetism generation, when the current is increased and the magnetic field is increased to a certain degree, the dynamic armature is attracted and pulled, the dynamic armature drives a tripping mechanism of a product, and the instant short-circuit protection effect is achieved. Compared with other types of tripping structures, the thermomagnetic tripping structure does not need to be provided with a coil, and the cost can be reduced.

In the prior art, a magnetic protection structure of a circuit breaker, as disclosed in CN202221248616.7, is arranged on an operating mechanism of the circuit breaker, and has a complex structure and is inconvenient to assemble.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the shortcoming and not enough that prior art exists, and provide a circuit breaker with magnetic protection mechanism.

The utility model discloses the technical scheme who takes as follows: a circuit breaker with a magnetic protection mechanism comprises a circuit breaker shell, an operating mechanism, a moving contact, a static contact and a magnetic protection mechanism, wherein the operating mechanism is in linkage fit with the moving contact, the moving contact can be closed/opened relative to the static contact through the operating mechanism, the magnetic protection mechanism comprises a static armature, a moving armature and a reset elastic piece, the static armature is attached to the static contact and is fixed in the circuit breaker shell, the static armature and the moving armature are hinged to each other through a hinge shaft, the moving armature can rotate relative to the static armature, the reset elastic piece and the moving armature form a reset acting force rotating in the direction far away from the static armature, and the moving armature can be opened relative to the static contact at the closed position in the process of rotating towards the direction of the static armature due to the cooperation of the moving armature and the operating mechanism or the moving contact.

The reset elastic piece is a torsion spring sleeved on the hinged shaft, and two ends of the torsion spring are respectively matched with the static armature and the movable armature in an abutting mode.

The static contact is located the static armature and is close to one side of moving the armature, the torsional spring both ends respectively with static contact, move the armature direct butt cooperation.

The static armature comprises a fixed main board and a first hinged side board which is located on one side of the fixed main board and protrudes, the movable armature comprises an action main board and a second hinged side board which is located on one side of the action main board and protrudes, and the hinge shaft penetrates through the first hinged side board and the second hinged side board to enable the static armature and the movable armature to form hinged connection.

The static armature comprises two first hinged side plates which are separated by a certain distance, the movable armature comprises two second hinged side plates which are separated by a certain distance, the distance between the first hinged side plates and the distance between the second hinged side plates correspond to enable the two first hinged side plates to be respectively attached to the two second hinged side plates, the hinged shafts penetrate through the two first hinged side plates and the two second hinged side plates to enable the static armature and the movable armature to form hinged connection, and the reset elastic parts are located between the two first hinged side plates and between the two second hinged side plates.

The static contact is including the wiring board, connecting plate and the contact board that connect gradually, the wiring board is used for connecing the outer wall wire, the contact board is used for cooperating with the moving contact with closure/disconnection, the connecting plate sets up with fixed mainboard laminating mutually, the connecting plate is equipped with first location lug and second location lug respectively with fixed mainboard, circuit breaker shells inner wall corresponds first location lug and second location lug and is equipped with first location caulking groove and second location caulking groove respectively.

The contact plate is bent relative to the connecting plate, one end, close to the contact plate, of the fixed main board is bent to form a positioning plate attached to the surface of the contact plate, and a positioning lug is arranged on one side, away from the contact plate, of the positioning plate on the inner wall of the breaker shell.

And a limiting column for limiting the rotation angle of the movable armature is arranged on the inner wall of the shell of the circuit breaker.

The operating mechanism comprises a handle, a moving contact fixing seat, a trip buckle and a lock catch which are in transmission fit, and the moving contact at the closed position can be disconnected from the fixed contact in the process that the moving armature is matched with the lock catch to rotate towards the direction of the fixed armature.

Still include thermal protection mechanism, explosion chamber, incoming line terminal, thermal protection mechanism includes two gold sheets, run-on piece, connection piece, the one end fixed connection of two gold sheets, run-on piece, connection piece, the other end of two gold sheets pass through the wire and be connected with the moving contact and with the hasp between be equipped with the driving medium, the other end and the explosion chamber cooperation of run-on piece, the other end and the incoming line terminal of connection piece are connected.

The utility model has the advantages as follows: the utility model discloses compare other conventional circuit breakers, cancel the coil, but reduce cost compares the magnetism protection mechanism among the prior art, the utility model discloses a quiet armature with move the articulated back of connecting of armature, but direct mount on shells inner wall, and save welding processes between the contact, simple structure, the temperature rise is low, divides disconnected reliably.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings obtained from these drawings still belong to the scope of the present invention without inventive laboriousness.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic structural diagram of the fixed contact and the magnetic protection mechanism according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a static armature according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a movable armature according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a stationary contact according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a base according to an embodiment of the present invention;

in the figure, 1, a base; 101, a first positioning caulking groove; 102, a second positioning caulking groove; 103, positioning the bump; 104, a limiting column; 2, an operating mechanism; 201, a handle; 202, moving contact fixing seats; 203, jumping and buckling; 204, locking and buckling; 3, a moving contact; 4, static contact; 401, a patch panel; 402, a connecting plate; 403, a contact plate; 404, a first positioning bump; 5, a static armature; 501, fixing a main board; 502, a first hinged side panel; 503, a second positioning bump; 504, positioning plates; 6, moving the armature; 601, acting on a main board; 602, a second hinged side panel; 603, a pushing part; 7, resetting the elastic piece; 8, hinging a shaft; 9, honeysuckle flower; 10, an arc striking sheet; 11, connecting sheets; 12, an arc extinguishing chamber; 13, an incoming terminal; 14, a wire; 15, a transmission member.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.

It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it is understood that "first" and "second" are only used for convenience of expression and should not be construed as limitations to the embodiments of the present invention, and the following embodiments do not describe the embodiments one by one.

The terms of direction and position in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer to the direction and position of the attached drawings. Accordingly, the use of directional and positional terms is intended to illustrate and understand the present invention and is not intended to limit the scope of the invention.

A circuit breaker with a magnetic protection mechanism is shown in figure 1 and comprises a circuit breaker shell, an operating mechanism 2, a moving contact 3, a static contact 4 and the magnetic protection mechanism, wherein the circuit breaker shell consists of a base 1 and an upper cover, and the upper cover is hidden in figure 1 for embodying a specific structure.

The operating mechanism 2 is in linkage fit with the moving contact 3, the moving contact 3 can be closed/opened relative to the static contact 4 through the operating mechanism 2, the operating mechanism 2 comprises a handle 201, a moving contact fixing seat 202, a trip 203 and a lock 204 which are in transmission fit, and the specific transmission fit structure is a conventional structure.

As shown in fig. 2, the magnetic protection mechanism includes a fixed armature 5, a moving armature 6, and a reset elastic member 7, the fixed armature 5 is fixed in the circuit breaker housing in contact with the fixed contact 4, the fixed armature 5 and the moving armature 6 are hinged to each other by a hinge shaft 8, the moving armature 6 is rotatable relative to the fixed armature 5, the reset elastic member 7 and the moving armature 6 form a reset acting force rotating in a direction away from the fixed armature 5 to the moving armature 6, and the moving armature 6 cooperates with the operating mechanism 2 or the moving contact 3 to make the moving contact 3 located at a closed position break relative to the fixed contact 4 in a process of rotating in a direction of the fixed armature 5. When the device is installed, the static armature and the movable armature are hinged and connected, and then the device can be directly installed on the inner wall of the shell, a welding procedure is omitted between the device and the contact, and the device is convenient to assemble.

Further, the elastic reset piece 7 is a torsion spring sleeved on the hinge shaft 8, and two ends of the torsion spring are respectively in butt fit with the static armature 5 and the movable armature 6. During the equipment, articulated shaft 8 passes static armature 5, moves armature 6, torsional spring, makes the three even as an organic whole, then direct mount on the shells inner wall, compact structure, and the equipment is convenient, does not influence the distribution of other parts in the circuit breaker. Tension springs or other elastic return structures can also be provided between the moving armature 6 and the inner wall of the housing, but are more complicated than assembly and affect the distribution of other parts inside the circuit breaker.

Furthermore, the static contact 4 is located on one side of the static armature 5 close to the moving armature 6, and two ends of the torsion spring are respectively in direct butt fit with the static contact 4 and the moving armature 6. During assembly, after the static contact 4 and the static armature 5 are overlapped, the hinged shaft 8 penetrates through the static armature 5, the movable armature 6 and the torsion spring to enable the static contact 4 and the static armature 5 to be connected into a whole, the assembly is more convenient, and after the assembly, the torsion spring pushes the static contact 4 to enable the static contact to be kept attached to the static armature 5.

Further, as shown in fig. 3, the fixed armature 5 includes a fixed main plate 501 and a first hinged side plate 502 protruding from one side of the fixed main plate 501, as shown in fig. 4, the movable armature 6 includes an acting main plate 601 and a second hinged side plate 602 protruding from one side of the acting main plate 601, and the hinged shaft 8 passes through the first hinged side plate 502 and the second hinged side plate 602 to form a hinged connection between the fixed armature 5 and the movable armature 6.

The static armature 5 includes two first hinged side plates 502 separated by a certain distance, the movable armature 6 includes two second hinged side plates 602 separated by a certain distance, the distance between the first hinged side plates 502 corresponds to the distance between the second hinged side plates 602, so that the two first hinged side plates 502 are respectively attached to the two second hinged side plates 602, the hinge shaft 8 passes through the two first hinged side plates 502 and the two second hinged side plates 602 to form a hinged connection between the static armature 5 and the movable armature 6, and the reset elastic member 7 is located between the two first hinged side plates 502 and between the two second hinged side plates 602. Therefore, after the articulated shaft 8 passes through the static armature 5, the movable armature 6 and the torsion spring, the torsion spring is limited and cannot be separated.

As shown in fig. 5, the fixed contact 4 includes a wiring board 401, a connecting board 402 and a contact board 403, which are connected in sequence, the wiring board 401 is used for connecting an outer wall wire, the contact board 403 is used for being matched with the movable contact 3 to be closed/opened, the connecting board 402 is attached to the fixed main board 501, the connecting board 402 and the fixed main board 501 are respectively provided with a first positioning protrusion 404 and a second positioning protrusion 503, and the inner wall of the circuit breaker housing is respectively provided with a first positioning caulking groove 101 and a second positioning caulking groove 102 corresponding to the first positioning protrusion 404 and the second positioning protrusion 503. Thus, the assembly shown in fig. 2 is fixed by plugging.

Furthermore, the contact plate 403 is bent relative to the connecting plate 402, one end of the fixed main plate 501 close to the contact plate 403 is bent to form a positioning plate 504 attached to the surface of the contact plate 403, and a positioning protrusion 103 is disposed on one side of the positioning plate 504 away from the contact plate 403 on the inner wall of the circuit breaker housing. Thus, the positioning is convenient when the assembly is carried out.

And a limiting column 104 for limiting the rotation angle of the movable armature 6 is arranged on the inner wall of the shell of the circuit breaker.

As shown in fig. 1, the movable armature 6 cooperates with the latch 204 to make the movable contact 3 located at the closed position to be disconnected from the stationary contact 4 in the process of rotating toward the stationary armature 5. In fig. 1, the positions of the parts are at the disconnecting device, when the moving contact 3 is closed, the latch 204 rotates clockwise to the rotating path of the moving armature 6, specifically, the moving path of the pushing portion 603 at the outer end of the acting main plate 601, and when the static armature 5 attracts the moving armature 6, the moving armature 6 rotates clockwise to push the latch 204 to disconnect the moving contact.

As shown in fig. 1, the circuit breaker of this embodiment further includes a thermal protection mechanism, an arc extinguish chamber 12 and a line inlet terminal 13, the thermal protection mechanism includes a double-gold-piece 9, an arc striking piece 10 and a connecting piece 11, one end of the double-gold-piece 9, the arc striking piece 10 and the connecting piece 11 is fixedly connected, the other end of the double-gold-piece 9 is connected with the moving contact 3 through a wire 14 and is provided with a transmission member 15 between the lock catch 204, the other end of the arc striking piece 10 is matched with the arc extinguish chamber 12, and the other end of the connecting piece 11 is connected with the line inlet terminal 13.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims

1. The utility model provides a circuit breaker with magnetism protection mechanism, includes circuit breaker casing, operating device (2), moving contact (3), static contact (4), magnetism protection mechanism, operating device (2) and moving contact (3) linkage cooperation can make the relative static contact (4) of moving contact (3) close/break through operating device (2) and move, magnetism protection mechanism includes static armature (5), moves armature (6), elastic component (7) reset, its characterized in that: the static contact (4) is attached to the static armature (5) and fixed in a shell of the circuit breaker, the static armature (5) and the moving armature (6) are hinged through a hinge shaft (8) to enable the moving armature (6) to rotate relative to the static armature (5), the reset elastic piece (7) and the moving armature (6) form a reset acting force rotating towards the direction far away from the static armature (5) to the moving armature (6), and the moving armature (6) is matched with the operating mechanism (2) or the moving contact (3) to enable the moving contact (3) located at the closed position to be disconnected relative to the static contact (4) in the process of rotating towards the direction of the static armature (5).

2. The circuit breaker with a magnetic protection mechanism according to claim 1, wherein: the reset elastic piece (7) is a torsion spring sleeved on the hinged shaft (8), and the two ends of the torsion spring are respectively in butt fit with the static armature (5) and the moving armature (6).

3. The circuit breaker with a magnetic protection mechanism according to claim 2, wherein: the static contact (4) is located on one side, close to the moving armature (6), of the static armature (5), and two ends of the torsion spring are in direct butt fit with the static contact (4) and the moving armature (6) respectively.

4. The circuit breaker with a magnetic protection mechanism of claim 3, wherein: static armature (5) including fixed mainboard (501) and be located fixed mainboard (501) one side bellied first articulated curb plate (502), move armature (6) including acting mainboard (601) and being located the bellied articulated curb plate of second (602) of acting mainboard (601) one side, articulated shaft (8) pass first articulated curb plate (502) and the articulated curb plate of second (602) make static armature (5) and move armature (6) and form articulated the connection.

5. The circuit breaker with a magnetic protection mechanism according to claim 4, wherein: the static armature (5) comprises two first hinged side plates (502) which are separated by a certain distance, the movable armature (6) comprises two second hinged side plates (602) which are separated by a certain distance, the distance between the first hinged side plates (502) corresponds to the distance between the second hinged side plates (602) so that the two first hinged side plates (502) are respectively attached to the two second hinged side plates (602), the hinged shaft (8) penetrates through the two first hinged side plates (502) and the two second hinged side plates (602) to enable the static armature (5) and the movable armature (6) to form hinged connection, and the reset elastic part (7) is located between the two first hinged side plates (502) and between the two second hinged side plates (602).

6. The circuit breaker with a magnetic protection mechanism according to claim 4, wherein: the static contact (4) comprises a wiring board (401), a connecting board (402) and a contact board (403) which are sequentially connected, the wiring board (401) is used for connecting an outer wall wire, the contact board (403) is used for being matched with the moving contact (3) to be closed/disconnected, the connecting board (402) is attached to the fixed main board (501), the connecting board (402) and the fixed main board (501) are respectively provided with a first positioning lug (404) and a second positioning lug (503), and the inner wall of the shell of the circuit breaker corresponding to the first positioning lug (404) and the second positioning lug (503) is respectively provided with a first positioning caulking groove (101) and a second positioning caulking groove (102).

7. The circuit breaker with a magnetic protection mechanism of claim 6, wherein: the contact plate (403) is bent relative to the connecting plate (402), one end, close to the contact plate (403), of the fixed main board (501) is bent to form a positioning plate (504) attached to the surface of the contact plate (403), and a positioning bump (103) is arranged on one side, away from the contact plate (403), of the positioning plate (504) on the inner wall of the breaker shell.

8. The circuit breaker with a magnetic protection mechanism according to claim 1, wherein: and a limiting column (104) for limiting the rotation angle of the movable armature (6) is arranged on the inner wall of the shell of the circuit breaker.

9. A circuit breaker with a magnetic protection mechanism according to any one of claims 1 to 8 wherein: the operating mechanism (2) comprises a handle (201) in transmission fit, a moving contact fixing seat (202), a trip buckle (203) and a lock catch (204), and the moving armature (6) is matched with the lock catch (204) to enable the moving contact (3) located at the closed position to be disconnected from the static contact (4) in the process of rotating towards the direction of the static armature (5).

10. The circuit breaker with a magnetic protection mechanism of claim 9, wherein: still include thermal protection mechanism, explosion chamber (12), incoming line terminal (13), thermal protection mechanism includes two gold sheets (9), arc piece (10), connection piece (11), the one end fixed connection of two gold sheets (9), arc piece (10), connection piece (11), the other end of two gold sheets (9) pass through wire (14) and be connected with moving contact (3) and with hasp (204) between be equipped with driving medium (15), the other end and the explosion chamber (12) cooperation of arc piece (10), the other end and incoming line terminal (13) of connection piece (11) are connected.