CN215955215U

CN215955215U - Electromagnetic trigger mechanism for circuit breaker

Info

Publication number: CN215955215U
Application number: CN202121183026.6U
Authority: CN
Inventors: 刘益; 李昆; 金旭; 邓卫新; 赵延峰
Original assignee: Beijing Bevone Electric Co ltd
Current assignee: Beijing Bevone Electric Co ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2022-03-04
Anticipated expiration: 2031-05-28

Abstract

The utility model relates to an electromagnetic trigger mechanism for a circuit breaker, which comprises a static iron core and a movable iron core; the whole static iron core is of a U-shaped structure and comprises a magnetic conduction plate and a magnetic conduction rod; the magnetic conduction plate is arranged opposite to the movable iron core; two first mounting holes are formed in the magnetic conduction plate, and a first preset distance is reserved between the two first mounting holes; the two magnetic conduction rods are arranged between the magnetic conduction plate and the movable iron core, one end of one magnetic conduction rod is fixedly connected with the magnetic conduction plate through one mounting hole, and the other end of the one magnetic conduction rod faces the movable iron core; one end of the other end is fixedly connected with the magnetic conduction plate through the other mounting hole, and the other end faces the movable iron core; each magnetic conducting rod is wound with a conducting wire. The utility model has the advantages of modular design, relatively integral molding, reduced processing difficulty, manufacturing cost saving, convenient disassembly and assembly and suitability for various types of circuit breakers.

Description

Electromagnetic trigger mechanism for circuit breaker

Technical Field

The utility model relates to the technical field of circuit breakers, in particular to an electromagnetic trigger mechanism for a circuit breaker.

Background

The circuit breaker can play a role in protecting a circuit as an important electrical component in a low-voltage distribution network. The demand is large, and the application range is wide. When a circuit is in short circuit or is seriously overloaded, the electromagnetic trigger mechanism for the circuit breaker in the circuit breaker drives the moving contact to move through the transmission component, so that the moving contact is separated from the fixed contact, and the circuit is disconnected. Thus, the circuit breaker can play a role in protecting the circuit.

However, the existing electromagnetic trigger mechanism for the circuit breaker has high manufacturing cost and is not beneficial to popularization and application.

SUMMERY OF THE UTILITY MODEL

The utility model provides an electromagnetic trigger mechanism for a circuit breaker, aiming at solving the problems of higher manufacturing cost and lower adaptability of a static iron core of the traditional circuit breaker.

The electromagnetic trigger mechanism for the circuit breaker comprises a static iron core and a movable iron core;

the static iron core is integrally of a U-shaped structure and comprises a magnetic conduction plate and a magnetic conduction rod;

the magnetic conduction plate is arranged opposite to the movable iron core; two first mounting holes are formed in the magnetic conduction plate, and a first preset distance is reserved between the two first mounting holes;

the two magnetic conduction rods are arranged between the magnetic conduction plate and the magnetic conduction rod, one end of one magnetic conduction rod is fixedly connected with the magnetic conduction plate through one mounting hole, and the other end of the one magnetic conduction rod faces the movable iron core; one end of the other end of the movable iron core;

and each magnetic conducting rod is wound with a conducting wire.

In one specific embodiment, the movable iron core is of a plate-shaped structure.

In one specific embodiment, the movable iron core comprises an induction plate, a driving plate and a connecting plate; the induction plate, the driving plate and the connecting plate are located on the same plane;

the induction plate is opposite to the magnetic conduction plate;

one side of the induction plate is fixedly connected with one side of the driving plate, and the other side of the induction plate is fixedly connected with one side of the connecting plate.

In one specific embodiment, two ends of the connecting plate are respectively provided with a folding lug bent towards the magnetic conducting plate, and each folding lug is provided with a second mounting hole; and the second mounting hole is fixedly connected with the inner wall of the shell of the folded lug and the breaker by using a rotating shaft and a return spring.

In one specific embodiment, the magnetic conducting rod is a screw rod, and correspondingly, the two first mounting holes are threaded holes.

In one embodiment, the axes of the two magnetic rods are parallel to each other and perpendicular to the magnetic plates.

In one specific embodiment, the magnetic conductive plate, the magnetic conductive rod and the movable iron core are made of soft magnetic materials.

In one specific embodiment, a second preset distance is reserved between the end face of one end of each magnetic conducting rod, which is far away from the magnetic conducting plate, and the plane where the movable iron core is located.

The utility model has the beneficial effects that: according to the electromagnetic trigger mechanism for the circuit breaker, the two mounting holes are formed in the magnetic conduction plate, so that compared with the traditional static iron core, the processing difficulty is reduced, the processing cost is saved, and the electromagnetic trigger mechanism is beneficial to popularization and use. Two magnetic conduction rods which correspond to the two mounting holes one to one are fixed on the magnetic conduction plate, so that the whole static iron core structure is U-shaped, and the electromagnetic trigger structure can adapt to circuit breakers of different models by replacing the magnetic conduction rods with different lengths.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of an electromagnetic trigger mechanism for a circuit breaker according to the present invention;

fig. 2 is a schematic structural diagram of an embodiment of a magnetic conductive plate of the electromagnetic triggering mechanism for the circuit breaker shown in fig. 1;

fig. 3 is a schematic structural diagram of an embodiment of a movable iron core in the electromagnetic trigger mechanism for the circuit breaker shown in fig. 1.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "top," "bottom," "inner," "outer," "axial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention or for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "connected," "secured," "engaged," "hinged," and the like are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other suitable relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1, 2 and 3, as an embodiment of the present invention, an electromagnetic trigger mechanism for a circuit breaker includes a stationary core 100 and a movable core 200. The stationary core 100 has a U-shaped structure, and includes a magnetic conductive plate 110 and a magnetic conductive rod 120. The magnetic conduction plate 110 is arranged opposite to the movable iron core 200. Two first mounting holes 130 are formed in the magnetic conduction plate 110, and a first preset distance is reserved between the two first mounting holes 130. The two magnetic conducting rods 120 are arranged between the magnetic conducting plate 110 and the movable iron core 200, one end of one of the two magnetic conducting rods is fixedly connected with the magnetic conducting plate 110 through one of the mounting holes, the other end of the other magnetic conducting rod faces the other end of the movable iron core 200 and is fixedly connected with the magnetic conducting plate 110 through the other mounting hole, and a conducting wire is wound on each magnetic conducting rod 120 facing the movable iron core 200.

In this embodiment, whole electromagnetic trigger mechanism for circuit breaker modularized design, relative integrated into one piece, the processing degree of difficulty reduces, practices thrift manufacturing cost, is applicable to multiple model circuit breaker. When a short circuit occurs in the circuit, the current of the wire wound around the magnetic conduction rod 120 increases sharply, so that the magnetic conduction rod 120 and the magnetic conduction plate 110 generate magnetic flux, and an attractive force is generated on the movable iron core 200.

In an embodiment of the present invention, the plunger 200 has a plate structure, and includes an induction plate 220, a driving plate 210, and a connection plate 230. Sensing plate 220, drive plate 210, and connection plate 230 are coplanar. The induction plate 220 is disposed opposite to the magnetic conduction plate 110. One side of the sensing plate 220 is fixedly connected with one side of the driving plate 210, and the other side is fixedly connected with one side of the connecting plate 230. And redundant parts are not required to be added, the whole structure is relatively simple, and the manufacturing cost is saved.

In an embodiment of the present invention, two ends of the connecting plate 230 are respectively provided with a folding lug 231 bent toward the magnetic conducting plate 110, and each folding lug 231 is provided with a second mounting hole 232. The lug 231 and the inner wall of the case of the circuit breaker are fixedly coupled through the second mounting hole 232 using a rotating shaft and a return spring. When a short circuit occurs in the circuit, magnetic fluxes are generated in the magnetic conducting rods 120 and the magnetic conducting plate 110, a magnetic field is generated at one end of each of the two magnetic conducting rods 120 close to the induction plate 220, so that an electromagnetic attraction force to the induction plate 220 is generated, the induction plate 220 can be attracted by one end of each of the two magnetic conducting rods 120 close to the induction plate 220, when the generated electromagnetic attraction force is greater than the elastic force of the reset spring, the induction plate 220 displaces towards one end of each of the two magnetic conducting rods close to the induction plate 220, and then the driving plate 210 moves downwards to trigger a circuit breaker protection mechanism arranged below the driving plate 210, and the circuit is disconnected to protect the electric appliance.

In an embodiment of the present invention, the magnetic conducting rod 120 is a screw rod, and correspondingly, the two first mounting holes 130 are threaded holes. The axes of the two first mounting holes 130 are parallel to each other and perpendicular to the magnetic conductive plate 110. The static iron core 100 is convenient to disassemble and assemble, the whole installed static iron core 100 is of a U-shaped structure, the strongest magnetic poles at two ends are positioned at the U-shaped opening, the strength of an equivalent magnetic field is doubled, and the attraction force to the movable iron core 200 is strengthened.

In an embodiment of the present invention, the magnetic conductive plate 110, the movable core 200 and the two magnetic conductive rods 120 are made of soft magnetic materials. Soft magnetic materials are easily magnetized and also easily demagnetized. When a short circuit occurs in the circuit, the magnetic conductive plate 110 and the two magnetic conductive rods 120 can be quickly magnetized to generate a magnetic field, and attract the movable iron core 200 to trigger the circuit breaker protection device to break the circuit, so that the circuit and the electric appliance can be protected in time. When the circuit is disconnected, no current flows, the magnetic fields around the magnetic conducting plate 110 and the two magnetic conducting rods 120 disappear, and then demagnetize, and the movable iron core 200 moves away from the two magnetic conducting rods 120 under the action of the elastic force of the return spring matched with the movable iron core and returns to the initial position to be ready for next triggering.

In an embodiment of the present invention, a second predetermined distance is left between an end surface of one end of each of the two magnetic conducting rods 120 away from the magnetic conducting plate 110 and a plane of the movable iron core 200. The U-shaped stationary core 100 can generate a magnetic field to generate an electromagnetic attraction force to the movable core 200, thereby displacing the movable core 200.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an example," "a specific example," "one specific embodiment," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, a schematic representation of the term does not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the scope of the present invention by equivalent replacement or change according to the technical solution and the inventive concept of the present invention within the scope of the present disclosure.

Claims

1. An electromagnetic trigger mechanism for a circuit breaker, comprising:

a static iron core and a movable iron core;

and each magnetic conducting rod is wound with a conducting wire.

2. The electromagnetic trigger mechanism for the circuit breaker as recited in claim 1, wherein the plunger has a plate-like structure.

3. The electromagnetic trigger mechanism for the circuit breaker as recited in claim 2, wherein the movable iron core comprises an induction plate, a driving plate and a connecting plate; the induction plate, the driving plate and the connecting plate are located on the same plane;

the induction plate is opposite to the magnetic conduction plate;

4. The electromagnetic trigger mechanism for the circuit breaker according to claim 3, wherein both ends of the connecting plate are provided with a folded lug which is bent towards the magnetic conductive plate, and each folded lug is provided with a second mounting hole; and the second mounting hole is fixedly connected with the inner wall of the shell of the folded lug and the breaker by using a rotating shaft and a return spring.

5. The electromagnetic trigger mechanism of any one of claims 1 to 4, wherein the magnetic rod is a threaded rod, and correspondingly, the two first mounting holes are threaded holes.

6. An electromagnetic trigger mechanism for a circuit breaker according to any one of claims 1 to 4 wherein the axes of the two magnetic conductive rods are parallel to each other and perpendicular to the magnetic conductive plate.

7. The electromagnetic trigger mechanism for the circuit breaker according to any one of claims 1 to 4, wherein the magnetic conductive plate, the magnetic conductive rod and the movable iron core are made of soft magnetic materials.

8. The electromagnetic trigger mechanism for the circuit breaker according to any one of claims 1 to 4, wherein a second predetermined distance is left between an end surface of one end of each of the two magnetic conduction rods, which is far away from the magnetic conduction plate, and a plane where the movable iron core is located.