CN220456335U - Circuit breaker - Google Patents

Abstract

The utility model relates to the technical field of switches, and particularly discloses a circuit breaker, which comprises a backup protection device and a limiting part, wherein the backup protection device comprises a bracket, an armature, an elastic piece and a magnetic yoke, and the bracket is fixed on a connecting plate; the magnetic yoke is fixed on the connecting plate; the bracket is provided with a rotating shaft along a first direction, the armature is rotationally connected with the rotating shaft, and the armature is relatively fixed with the rotating shaft along the first direction; the elastic piece is connected with the armature and the magnetic yoke and is used for keeping the armature and the magnetic yoke separated; the limiting part is arranged on the shell of the circuit breaker and limits the rotating shaft to generate displacement in the first direction and the second direction. When faults such as short circuit occur in the circuit breaker, the magnetic yoke charges and generates magnetic force, and the magnetic force acts on the armature, and because the limiting part makes the rotating shaft fixed along the first direction and the second direction, and then when the armature and the magnetic yoke are mutually magnetically attracted, the magnetic force can be prevented from acting on the support, the deformation of the support is avoided, the deformation or dislocation of the armature and the magnetic yoke is avoided, and the working stability of the backup protection device is improved.

Description

Circuit breaker

Technical Field

The utility model relates to the technical field of switches, in particular to a circuit breaker.

Background

The backup protection device is an important device of the circuit breaker and plays a very large role in electrical safety, so that a good backup protection device is very important in products. When the main protection component of the circuit breaker or the circuit breaker fails, the circuit breaker breaks a loop through the backup protection device.

At present, the backup protection device mainly comprises an armature and a magnetic yoke, wherein the magnetic yoke can attract the armature to rotate the armature, and the armature rotates to strike the traction rod to disconnect the circuit breaker. However, in the long-term use of the circuit breaker, the armature and the magnetic yoke are easily dislocated, so that the magnetic attraction force of the magnetic yoke acting on the armature is weakened, the magnetic yoke gradually cannot attract the armature to rotate the armature, the working stability of the backup protection device is reduced, and the circuit breaker cannot be disconnected.

Disclosure of Invention

The utility model aims at: the circuit breaker is provided to solve armature and magnetic force subassembly among the relevant technique and take place to warp or dislocation, and then lead to the magnetic attraction that magnetic force subassembly acted on the armature to weaken, lead to magnetic force unable drive armature rotation gradually, lead to unable disconnection backward flow in order to excision trouble, and then lead to the problem of backup protection device job stabilization nature reduction.

The present utility model provides a circuit breaker, comprising:

a backup protection device, the backup protection device comprising:

the bracket is fixed on the connecting plate;

a yoke fixed to the coupling plate;

the armature is provided with a rotating shaft along a first direction, the armature is rotationally connected with the rotating shaft, and the armature is relatively fixed with the rotating shaft along the first direction;

an elastic member connecting the armature and the yoke, the elastic member being for keeping the armature and the yoke separated;

and the limiting part is arranged on the shell of the circuit breaker and limits the rotating shaft to generate displacement in the first direction and the second direction.

As the preferable technical scheme of the circuit breaker, the elastic piece is sleeved on the rotating shaft, and two ends of the elastic piece are respectively connected with the armature and the magnetic yoke.

As the preferable technical scheme of the circuit breaker, a groove is concavely arranged on the armature along the second direction, one end of the elastic piece is clamped in the groove, the other end of the elastic piece is bent to form a concave part concaved along the second direction, and the magnetic yoke is embedded into the concave part.

As the preferred technical scheme of circuit breaker, spacing portion includes along first locating part and the second locating part of first direction interval setting, armature opposite both sides butt respectively in first locating part with on the second locating part, just first locating part is followed first direction concave first spacing groove that is equipped with, second locating part is followed first direction concave second spacing groove that is equipped with, the both ends of pivot are located respectively first spacing groove with in the second spacing inslot.

As a preferable technical solution of the circuit breaker, the yoke includes at least two magnetic plates spaced along the first direction;

the armature comprises at least two movable plates which are arranged at intervals along the first direction, the at least two movable plates are arranged in one-to-one correspondence with the at least two magnetic plates, and the magnetic plates can absorb the movable plates.

As the preferable technical scheme of the circuit breaker, two movable plates are arranged, and the two movable plates are arranged on two sides of the bracket and are attached to the bracket;

the magnetic plates are arranged at two sides of the support and are attached to the support.

As the preferable technical scheme of the circuit breaker, the armature also comprises a synchronous plate, and the two movable plates are fixedly connected with the synchronous plate.

As the preferable technical scheme of the circuit breaker, the end face of the magnetic plate, which is opposite to the movable plate, is a first inclined plane, the end face of the movable plate, which is opposite to the magnetic plate, is a second inclined plane, and the first inclined plane and the second inclined plane can be attached.

As a preferable technical scheme of the circuit breaker, the bracket is provided with a limiting plate, and the armature can be abutted with the limiting plate so as to limit the separation distance between the armature and the magnetic yoke.

The beneficial effects of the utility model are as follows:

the utility model provides a circuit breaker, which comprises a backup protection device and a limiting part, wherein the backup protection device comprises a bracket, an armature, an elastic piece and a magnetic yoke, and the bracket is fixed on a connecting plate; the magnetic yoke is fixed on the connecting plate; the bracket is provided with a rotating shaft along a first direction, the armature is rotationally connected with the rotating shaft, and the armature is relatively fixed with the rotating shaft along the first direction; the elastic piece is connected with the armature and the magnetic yoke and is used for keeping the armature and the magnetic yoke separated; the limiting part is arranged on the shell of the circuit breaker, and the limiting part limits the rotating shaft to generate displacement in the first direction and the second direction. When the breaker has faults such as short circuit, the magnetic yoke charges and generates magnetic force, the magnetic force acts on the armature, the armature overcomes the elastic force of the elastic piece to rotate relative to the bracket under the action of the magnetic force, and then the traction rod is hit to disconnect the breaker. Because spacing portion makes the pivot fixed along first direction and second direction, and then armature and yoke are mutually magnetism when inhaling, can avoid acting on the support with magnetic force, avoid the support to warp, and then can not appear armature and yoke and take place to warp or dislocation, lead to the magnetic attraction that the yoke acted on the armature to weaken, lead to magnetic force unable drive armature to rotate gradually, lead to can't break off the backward flow in order to excision trouble, the device sets up spacing portion and has promoted the stability of backup protection device work.

Drawings

FIG. 1 is a schematic diagram of an interrupt router according to an embodiment of the present utility model;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic diagram of a backup protection device according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a structure of a bracket, a magnetic assembly and a rotating shaft according to an embodiment of the present utility model;

fig. 5 is a schematic structural view of an elastic member according to an embodiment of the present utility model.

In the figure:

x, a first direction; y, second direction;

1. a bracket; 11. a limiting plate;

2. an armature; 21. a movable plate; 22. a synchronizing plate; 221. a groove;

3. an elastic member; 31. a concave portion;

4. a yoke; 41. a magnetic plate;

5. a limit part; 51. a first limiting member; 511. a first limit groove; 52. a second limiting piece; 521. the second limit groove;

6. a rotating shaft; 7. a housing; 8. and a connecting plate.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first location" and "second location" are two distinct locations and wherein the first feature is "above," "over" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is level above the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

As shown in fig. 1 to 5, the present embodiment provides a circuit breaker including a backup protection device including a bracket 1, an armature 2, an elastic member 3, and a yoke 4, and a limit portion 5, the bracket 1 being fixed to a coupling plate 8; the magnetic yoke 4 is fixed on the connecting plate 8; a rotating shaft 6 is arranged on the bracket 1 along a first direction X, the armature 2 is rotationally connected with the rotating shaft 6, and the armature 2 is relatively fixed with the rotating shaft 6 along the first direction X; the elastic piece 3 is connected with the armature 2 and the magnetic yoke 4, and the elastic piece 3 is used for keeping the armature 2 and the magnetic yoke 4 separated; the limiting part 5 is arranged on the shell 7 of the circuit breaker, and the limiting part 5 limits the rotating shaft 6 to generate displacement in the first direction X and the second direction Y. When the circuit breaker has faults such as short circuit, the magnetic yoke 4 charges and generates magnetic force, the magnetic force acts on the armature 2, the armature 2 rotates relative to the bracket 1 against the elastic force of the elastic piece 3 under the action of the magnetic force, and then the traction rod is hit to disconnect the circuit breaker. Because pivot 6 is fixed along first direction X and second direction Y, and then armature 2 and yoke 4 each other when magnetism inhale, can avoid acting on support 1 with magnetic force, avoid support 1 to warp, and then can not appear armature 2 and yoke 4 and take place to warp or misplace, lead to the magnetic attraction that yoke 4 acted on armature 2 weakens, lead to the magnetic force unable drive armature 2 gradually to rotate, lead to unable disconnection backward flow in order to excision trouble, the device sets up spacing portion 5 and has promoted the stability of backup protection device work.

Specifically, the first direction X is an axial direction in which the armature 2 rotates relative to the bracket 1, and the second direction Y is perpendicular to the first direction X.

Optionally, the elastic element 3 is sleeved on the rotating shaft 6, and two ends of the elastic element 3 are respectively connected with the armature 2 and the magnetic yoke 4. In this embodiment, the elastic member 3 is a torsion spring, and the elastic member 3 gives the armature 2 a force in a direction away from the yoke 4. In other embodiments, a coil spring may be used, one end of which is fixedly connected to the armature 2, and the other end of which is fixedly connected to the bracket 1. Rubber ribs can also be used, one end of each rubber rib is fixedly connected with the armature 2, and the other end of each rubber rib is fixedly connected with the bracket 1.

Alternatively, the limiting portion 5 includes a first limiting member 51 and a second limiting member 52 disposed at intervals along the rotation axis of the armature 2, the yoke 4 and the armature 2 are both located between the first limiting member 51 and the second limiting member 52, the first limiting member 51 is simultaneously abutted with the armature 2 and the yoke 4, and the second limiting member 52 is simultaneously abutted with the armature 2 and the yoke 4. In this embodiment, the first limiting member 51 and the second limiting member 52 respectively abut against both sides of the yoke 4 and both sides of the armature 2, so that the yoke 4 and the armature 2 cannot move relatively in the axial direction (first direction X) along which the armature 2 rotates.

Alternatively, the first limiting member 51 is concavely provided with a first limiting groove 511 along the first direction X, the second limiting member 52 is concavely provided with a second limiting groove 521 along the first direction X, and two ends of the rotating shaft 6 are respectively located in the first limiting groove 511 and the second limiting groove 521. In this embodiment, the first limiting groove 511 and the second limiting groove 521 can limit the displacement of the rotating shaft 6 along the first direction X and the second direction Y, so as to prevent the bracket 1 from moving or deforming along the first direction X and the second direction Y, and further prevent the armature 2 and the yoke 4 from being dislocated along the first direction X and the second direction Y.

Alternatively, the armature 2 is concavely provided with a groove 221 in the second direction Y, and one end of the torsion spring is located in the groove 221. In this embodiment, the above arrangement can limit the torsion spring from moving on the rotating shaft 6 along the axial direction of the rotating shaft 6, so as to prevent the torsion spring from shaking left and right to cause the instability of the spring force of the torsion spring to the armature 2.

Alternatively, the other end of the torsion spring is fixed relatively to the yoke 4 in the axial direction of the rotation shaft 6. In this embodiment, this arrangement can further restrict the torsion spring from moving on the rotating shaft 6 in the axial direction of the rotating shaft 6.

As to how the other end of the torsion spring is fixedly connected with the yoke 4, optionally, the other end of the torsion spring is bent with a concave portion 31 recessed along the second direction Y, and the yoke 4 is inserted into the concave portion 31. In this embodiment, the other end of the torsion spring is bent with the recess 31, and the notch of the recess 31 faces the second direction Y, so that when the yoke 4 is embedded in the recess 31, the yoke 4 can limit the axial movement of the torsion spring along the rotating shaft 6. In other embodiments, an insertion hole may be provided on the yoke 4, where the insertion direction of the insertion hole is perpendicular to the axial direction of the rotating shaft 6, and the other end of the torsion spring is inserted into the insertion hole.

Alternatively, the yoke 4 includes at least two magnetic plates 41 spaced apart in the first direction X; the armature 2 includes at least two movable plates 21 arranged at intervals along the first direction X, the at least two movable plates 21 are arranged in one-to-one correspondence with at least two magnetic plates 41, and the magnetic plates 41 can adsorb the movable plates 21. In this embodiment, a plurality of magnetic plates 41 are provided to raise the magnetic attraction force of the yoke 4 to the armature 2.

Specifically, two movable plates 21 are provided, and the two movable plates 21 are arranged on two sides of the bracket 1 and are attached to the bracket 1; the two magnetic plates 41 are arranged, and the two magnetic plates 41 are arranged on two sides of the bracket 1 and are attached to the bracket 1. In this embodiment, the bracket 1 is opposite to the first limiting member 51 and the second limiting member 52 along the first direction X, so that the magnetic plate 41 and the movable plate 21 are always opposite to each other.

Optionally, the armature 2 further comprises a synchronizing plate 22, both moving plates 21 being fixedly connected to the synchronizing plate 22. In this embodiment, the movable plate 21 and the synchronizing plate 22 are integrally formed, and this arrangement can always synchronize the movement of the two movable plates 21.

In order to raise the magnetic force acting on the armature 2, the end surface of the magnetic plate 41 opposite to the movable plate 21 is a first inclined surface, the end surface of the movable plate 21 opposite to the magnetic plate 41 is a second inclined surface, and the first inclined surface and the second inclined surface can be bonded. In the present embodiment, the above arrangement can raise the relative areas of the two movable plates 21 and the two magnetic plates 41 of the armature 2.

Optionally, the bracket 1 is provided with a limiting plate 11, and the armature 2 can abut against the limiting plate 11 to limit the separation distance between the armature 2 and the yoke 4. In this embodiment, the limiting plate 11 and the bracket 1 are integrally formed by a stamping process.

Optionally, the circuit breaker further comprises a housing 7, and the backup protection device and the limiting part 5 are both fixedly arranged in the housing 7 of the circuit breaker.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. The circuit breaker, its characterized in that includes:

a backup protection device, the backup protection device comprising:

a bracket (1) fixed on the connecting plate (8);

a yoke (4) fixed to the coupling plate (8);

the armature (2) is provided with a rotating shaft (6) along a first direction (X) on the bracket (1), the armature (2) is rotationally connected with the rotating shaft (6), and the armature (2) is relatively fixed with the rotating shaft (6) along the first direction (X);

-an elastic element (3) connecting the armature (2) with the yoke (4), the elastic element (3) being adapted to keep the armature (2) separate from the yoke (4);

the limiting part (5), the limiting part (5) is arranged on a shell (7) of the circuit breaker, and the limiting part (5) limits the rotating shaft (6) to generate displacement in the first direction (X) and the second direction (Y).

2. The circuit breaker according to claim 1, characterized in that the elastic member (3) is sleeved on the rotating shaft (6), and two ends of the elastic member (3) are respectively connected with the armature (2) and the yoke (4).

3. Circuit breaker according to claim 2, characterized in that the armature (2) is concavely provided with a groove (221) along the second direction (Y), one end of the elastic member (3) is clamped in the groove (221), the other end of the elastic member (3) is bent to form a concave portion (31) concaved along the second direction (Y), and the yoke (4) is embedded in the concave portion (31).

4. The circuit breaker according to claim 2, characterized in that the limit portion (5) comprises a first limit piece (51) and a second limit piece (52) which are arranged at intervals along the first direction (X), and two opposite sides of the armature (2) are respectively abutted on the first limit piece (51) and the second limit piece (52).

5. The circuit breaker according to claim 4, characterized in that the first limiting member (51) is concavely provided with a first limiting groove (511) along the first direction (X), the second limiting member (52) is concavely provided with a second limiting groove (521) along the first direction (X), and both ends of the rotating shaft (6) are respectively located in the first limiting groove (511) and the second limiting groove (521).

6. Circuit breaker according to any one of claims 1 to 5, characterized in that the yoke (4) comprises at least two magnetic plates (41) arranged at intervals along the first direction (X);

the armature (2) comprises at least two movable plates (21) which are arranged at intervals along the first direction (X), the at least two movable plates (21) and the at least two magnetic plates (41) are arranged in one-to-one correspondence, and the magnetic plates (41) can absorb the movable plates (21).

7. The circuit breaker according to claim 6, characterized in that two movable plates (21) are provided, and two movable plates (21) are provided on both sides of the bracket (1) and are attached to the bracket (1);

the two magnetic plates (41) are arranged, and the two magnetic plates (41) are arranged on two sides of the support (1) and are attached to the support (1).

8. Circuit breaker according to claim 7, characterized in that the armature (2) further comprises a synchronizing plate (22), both moving plates (21) being fixedly connected to the synchronizing plate (22).

9. The circuit breaker according to claim 6, characterized in that an end surface of the magnetic plate (41) opposite to the movable plate (21) is a first inclined surface, an end surface of the movable plate (21) opposite to the magnetic plate (41) is a second inclined surface, and the first inclined surface and the second inclined surface can be attached.

10. Circuit breaker according to claim 6, characterized in that the bracket (1) is provided with a limiting plate (11), the armature (2) being able to abut against the limiting plate (11) to limit the distance at which the armature (2) is separated from the yoke (4).