CN219226193U - Magnetic flux release and circuit breaker - Google Patents

Abstract

The utility model belongs to the technical field of circuit breakers, and discloses a magnetic flux release and a circuit breaker. The magnetic flux release comprises a mounting frame, a pushing piece, an ejection piece, a first elastic piece, a jump fastener and an electromagnetic driving piece, wherein the pushing piece comprises a push rod main body, a pushing arm and a transmission arm, the push rod main body is rotationally arranged on the mounting frame, and the pushing arm and the transmission arm are arranged on the push rod main body. The ejector is movably arranged between the ejector and the mounting frame, the ejector can be ejected, the ejector pushes the transmission arm to rotate, the transmission arm can be pushed to press the ejector by the pushing arm to compress the first elastic piece. The jump fastener rotates to be set up on the mounting bracket, can selectively lock spacing to the ejecting piece of compression first elastic component. The electromagnetic driving piece is arranged on the mounting frame and can drive the jump fastener to rotate so as to release the locking of the ejection piece. The tripping resetting device of the magnetic flux tripping device has simple structure and stable and reliable operation.

Description

Magnetic flux release and circuit breaker

Technical Field

The utility model relates to the technical field of circuit breakers, in particular to a magnetic flux release and a circuit breaker.

Background

The magnetic flux release is an actuating device of an electronic molded case circuit breaker and mainly comprises a bracket, a coil, a permanent magnet, a spring, a movable iron core, a jump buckle, a push rod and the like. In normal condition, the movable iron core is kept at the suction position under the suction action of the permanent magnet. When overload or short circuit occurs, the transformer of the circuit breaker sends an overload or short circuit current signal to the controller, and then the controller sends an electronic pulse signal to the magnetic flux converter to enable the coil to be electrified to generate a reverse magnetic field, so that the attraction force of the permanent magnet to the movable iron core is greatly reduced, the movable iron core is released, the movable iron core is outwards ejected to drive the trip buckle to trip, the push rod is ejected under the action of the spring, and the actuating mechanism of the circuit breaker is pushed to open the circuit breaker.

The magnetic flux release needs to be reset to the engaging position after release, so that the magnetic flux release is ready for the next release. The existing resetting device is complex, more parts are needed, so that the assembly is complex, and time and labor are wasted; and the operation reliability of the device is difficult to ensure.

Accordingly, improvements to magnetic flux trips and circuit breakers are needed to address the above issues.

Disclosure of Invention

The utility model aims to provide a magnetic flux release, which has a simple structure and stable and reliable operation.

To achieve the purpose, the utility model adopts the following technical scheme:

a magnetic flux release comprising:

a mounting frame;

the pushing piece comprises a push rod main body, a push arm and a transmission arm, wherein the push rod main body is rotatably arranged on the mounting frame, and the push arm and the transmission arm are arranged on the push rod main body;

the ejector is movably arranged between the ejector and the mounting frame, the first elastic piece can eject the ejector to enable the ejector to push the transmission arm to rotate, and the pushing arm can enable the transmission arm to push the ejector to compress by pushing the pushing arm;

the jump fastener is rotationally arranged on the mounting frame and can selectively lock and limit the ejection piece compressing the first elastic piece;

the electromagnetic driving piece is arranged on the mounting frame and can drive the jump fastener to rotate so as to unlock the ejection piece.

As an alternative, the pushing member further includes a limiting plate, where the limiting plate is disposed on the push rod main body, and the limiting plate is used to limit a rotation angle range of the push rod main body.

As an alternative, the mounting frame comprises a mounting frame main body and two support plates, the two support plates are arranged at intervals in the mounting frame main body, mounting holes are formed in the support plates, the push rod main body is rotationally connected to the mounting holes through a first rotating shaft, at least one end of the push rod main body, which is axially arranged along the first rotating shaft, is provided with a limiting plate, and the limiting plate can be propped against the support plates to limit the rotation of the pushing piece.

As an alternative scheme, the pushing arm and the transmission arm are located at one end of the push rod main body, which is far away from the limiting plate, the pushing arm and the transmission arm are located at two ends of the push rod main body along the axial direction of the first rotating shaft respectively, and a preset included angle beta is formed between the extending direction of the pushing arm and the extending direction of the transmission arm.

Alternatively, the preset included angle β is 90 °.

Alternatively, the magnetic flux release further includes:

the shielding cover and the mounting frame enclose a shielding space, and the electromagnetic coil of the electromagnetic driving piece is arranged in the shielding space.

As an alternative, the shielding case is set to the U-shape, the mounting frame main body is also provided with a U-shape space, the shielding case and the U-shape opening of the mounting frame main body are located at two opposite sides of the shielding space, and the U-shape wall of the shielding case bends towards the mounting frame main body and is abutted to the inner wall of the mounting frame main body.

As an alternative, the mounting frame main body comprises a first plate, a second plate and a third plate which are connected in sequence, the first plate and the third plate are arranged in parallel, the first plate, the second plate and the third plate enclose into a U-shaped space, the mounting frame further comprises a connecting plate, and the connecting plate is used for connecting the first plate and one end, far away from the second plate, of the third plate.

Alternatively, the jump fastener includes:

one end of the jump buckle plate can be selectively buckled with the ejection piece, and the other end of the jump buckle plate is arranged opposite to the driving end of the electromagnetic driving piece;

the second rotating shaft is rotationally connected with the mounting frame, the jump buckle plate is fixedly connected with the second rotating shaft, and the electromagnetic driving piece can drive the jump buckle plate to drive the second rotating shaft to rotate relative to the mounting frame, so that the jump buckle plate is released from buckling with the ejection piece;

the second elastic piece is sleeved on the second rotating shaft, one end of the second elastic piece is hung on the mounting frame, the other end of the second elastic piece abuts against the jump buckle plate, and when the electromagnetic driving piece loses electricity, the second elastic piece applies force to the jump buckle plate so that the jump buckle plate can be kept at the position where the jump buckle plate is buckled with the ejection piece.

Another object of the present utility model is to provide a circuit breaker, which simplifies the overall structure and operates stably and reliably by providing the magnetic flux release.

To achieve the purpose, the utility model adopts the following technical scheme:

the circuit breaker comprises an actuating mechanism, wherein the actuating mechanism is used for adjusting the on-off state of the circuit breaker, and the circuit breaker further comprises the magnetic flux release, and the pushing arm of the magnetic flux release is in contact with the actuating mechanism.

The beneficial effects are that:

when overload or short circuit occurs in the circuit breaker, the electromagnetic driving piece is electrified to drive the trip piece to rotate, so that the trip piece is unlocked to the ejection piece, the ejection piece is ejected under the elastic action of the first elastic piece, the transmission arm is pushed to rotate, and the actuating mechanism of the circuit breaker is pushed to move to realize opening. After the fault is removed, the actuating mechanism moves back to switch on, meanwhile, the pushing arm is pushed to rotate reversely, the transmission arm rotates reversely along with the pushing arm, the ejection piece is pushed to move reversely to compress the first elastic piece, at the moment, the electromagnetic driving piece is synchronously powered off, the jump fastener resets to lock the ejection piece, and the magnetic flux release is restored to an initial state, so that reset is realized. Through setting up reciprocating pivoted impeller, with actuating mechanism cooperation can realize tripping and reset simultaneously, simplified the structure of magnetic flux release, be favorable to simplifying the assembly step, improve the steady reliability of device operation simultaneously.

Drawings

Fig. 1 is an assembly schematic diagram of a magnetic flux release and an actuator according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a magnetic flux release according to an embodiment of the present utility model under a view angle;

fig. 3 is a schematic structural diagram of a magnetic flux release according to an embodiment of the present utility model in another view;

FIG. 4 is a schematic view of a mounting frame according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a pusher member according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of a magnetic flux release according to an embodiment of the present utility model in yet another view;

fig. 7 is a schematic diagram of an assembly structure of a shielding case and a mounting frame according to an embodiment of the present utility model;

fig. 8 is a schematic structural diagram of a shielding case according to an embodiment of the present utility model.

In the figure:

100. a magnetic flux trip; 200. an actuator;

1. a mounting frame; 11. a mounting rack main body; 111. a first plate; 112. a second plate; 113. a third plate; 12. a support plate; 121. a mounting hole; 13. a connecting plate;

2. a pushing member; 21. a push rod main body; 22. a pushing arm; 23. a transmission arm; 24. a limiting plate; 25. a first rotating shaft;

3. an ejector;

4. a first elastic member;

5. a jump fastener; 51. a jump buckle plate; 52. a second rotating shaft; 53. a second elastic member;

6. an electromagnetic driving member; 61. a third elastic member; 62. a movable iron core;

7. a shield; 71. a cover bottom; 72. u-shaped wall.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the 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.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than 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 embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

As shown in fig. 1, the present embodiment provides a magnetic flux release 100 and a circuit breaker including the magnetic flux release 100, the circuit breaker further includes an actuator 200, the actuator 200 is used for adjusting the on-off of the circuit breaker, and the magnetic flux release 100 is used for pushing the actuator 200 of the circuit breaker to move when the circuit breaker is overloaded or shorted, so as to open the circuit breaker. The circuit breaker is a mature technology in the prior art, and other structures thereof will not be described in detail herein.

Specifically, as shown in fig. 2 and 3, the magnetic flux trip 100 includes a mounting frame 1, a pushing member 2, an ejector member 3, a first elastic member 4, a trip member 5, and an electromagnetic driving member 6, the pushing member 2 includes a push rod body 21, a pushing arm 22, and a transmission arm 23, the push rod body 21 is rotatably disposed on the mounting frame 1, and the pushing arm 22 and the transmission arm 23 are disposed on the push rod body 21. The ejector 3 is movably arranged on the mounting frame 1, the first elastic piece 4 is arranged between the ejector 3 and the mounting frame 1, the first elastic piece 4 can eject the ejector 3, the ejector 3 pushes the transmission arm 23 to rotate, and the transmission arm 23 can be pushed by the pushing arm 22 to press the ejector 3, so that the first elastic piece 4 is compressed. The jump fastener 5 is rotatably arranged on the mounting frame 1, and the jump fastener 5 can selectively lock and limit the ejection piece 3 of the compressed first elastic piece 4. The electromagnetic driving member 6 is disposed on the mounting frame 1, and the electromagnetic driving member 6 can drive the jump fastener 5 to rotate to unlock the ejection member 3. The first elastic member 4 may employ a spring.

When overload or short circuit occurs in the circuit breaker, the electromagnetic driving piece 6 is electrified to drive the jump buckle piece 5 to rotate, so that the jump buckle piece 5 releases the locking of the ejection piece 3, the ejection piece 3 ejects under the elastic action of the first elastic piece 4, thereby pushing the transmission arm 23 to rotate, and the pushing arm 22 rotates along with the transmission arm to push the actuating mechanism 200 of the circuit breaker to move to realize opening. After the fault is removed, the actuating mechanism 200 moves back to switch on, meanwhile, the pushing arm 22 is pushed to rotate reversely, the transmission arm 23 rotates reversely, so that the ejector 3 is pushed to move reversely to compress the first elastic piece 4, at the moment, the electromagnetic driving piece 6 is synchronously de-energized, the jump fastener 5 resets to lock the ejector 3, and the magnetic flux release 100 is restored to an initial state, so that resetting is realized. By arranging the pushing piece 2 capable of reciprocating and rotating, the magnetic flux release 100 can be tripped and reset simultaneously by being matched with the actuating mechanism 200, the structure of the magnetic flux release 100 is simplified, the assembly steps are simplified, and meanwhile, the running stability and reliability of the device are improved.

Further, as shown in fig. 2, the pushing member 2 further includes a limiting plate 24, the limiting plate 24 is disposed on the push rod main body 21, and the limiting plate 24 is used for limiting the rotation angle range of the push rod main body 21, and in combination with fig. 1, the arrangement can prevent the pushing member 2 from rotating excessively, so that the pushing arm 22 cannot contact with the actuator 200, and the circuit breaker cannot be disconnected in time.

Specifically, as shown in fig. 2 and 4, the mounting bracket 1 includes a mounting bracket main body 11 and two support plates 12, the two support plates 12 are arranged on the mounting bracket main body 11 at intervals, a mounting hole 121 is formed in the support plate 12, the push rod main body 21 is rotationally connected to the mounting hole 121 through a first rotating shaft 25, at least one end of the push rod main body 21 along the axial direction of the first rotating shaft 25 is provided with a limiting plate 24, and the limiting plate 24 can be abutted against the support plate 12 to limit the rotation of the pushing member 2, so that the pushing member 2 can always keep the pushing arm 22 in contact with the executing mechanism 200 in the rotation process, and the stable pushing of the executing mechanism 200 is realized. In this embodiment, one limiting plate 24 is provided, and the limiting plate 24 is disposed corresponding to the supporting plate 12 to limit the rotation angle of the pushing member 2, or two limiting plates 24 may be disposed, so that the two limiting plates 24 respectively correspond to the two supporting plates 12, and a better limiting effect can be achieved.

Optionally, referring to fig. 5, the pushing arm 22 and the driving arm 23 are located at one end of the push rod main body 21 facing away from the limiting plate 24, the pushing arm 22 and the driving arm 23 are respectively located at two ends of the push rod main body 21 along the axial direction of the first rotating shaft 25, and a preset included angle β is formed between the extending directions of the pushing arm 22 and the driving arm 23. Compared with the scheme that the pushing arm 22 and the transmission arm 23 are arranged in parallel, the space layout of the ejection piece 3 is convenient, and the miniaturization design of the whole magnetic flux release 100 is facilitated. The predetermined angle β is preferably 90 °.

Further, as shown in fig. 6, the magnetic flux trip 100 further includes a shielding cover 7, the shielding cover 7 and the mounting frame 1 enclose a shielding space, and an electromagnetic coil of the electromagnetic driving member 6 is disposed in the shielding space, so as to prevent the electromagnetic coil from being interfered by a current magnetic field of a main circuit of the circuit breaker to make a false trip.

Optionally, as shown in fig. 7 and 8, the shielding case 7 is set to be U-shaped, the mounting frame main body 11 is also provided with a U-shaped space, the U-shaped openings of the shielding case 7 and the mounting frame main body 11 are located at two opposite sides of the shielding space, the shielding case 7 includes a case bottom 71 and two U-shaped walls 72, and the U-shaped walls 72 are bent into the mounting frame main body 11 and are abutted against the inner wall of the mounting frame main body 11, so as to improve the tightness of the shielding space, thereby improving the shielding effect.

Specifically, please combine fig. 4 and 6, the mounting rack main body 11 includes a first plate 111, a second plate 112 and a third plate 113 which are connected in sequence, the first plate 111 and the third plate 113 are arranged in parallel, the first plate 111, the second plate 112 and the third plate 113 enclose a U-shaped space, the shielding cover 7 is placed between the first plate 111 and the third plate 113 from the U-shaped opening, and the shielding cover 7 is connected with the first plate 111 and the third plate 113 in a clamping manner so as to fix the shielding cover 7. The mounting frame 1 further includes a connection plate 13, and the connection plate 13 connects the ends of the first plate 111 and the third plate 113 away from the second plate 112, so as to prevent the first plate 111 and the third plate 113 from being deformed to cause unstable installation of the shielding case 7.

Alternatively, as shown in fig. 6, the electromagnetic driving member 6 includes an electromagnetic coil, a permanent magnet, a third elastic member 61, and a movable iron core 62, the electromagnetic coil and the permanent magnet are disposed in the shielding case 7, the movable iron core 62 extends out of the shielding case 7, and the third elastic member 61 is located outside the shielding case 7 and is sleeved on the movable iron core 62. The electromagnetic driving member 6 is a driving mechanism commonly used in the prior art, and the specific driving principle and connection relationship thereof will not be described in detail herein. In normal conditions, the plunger 62 is held in the attracted position by the attraction of the permanent magnet. When an overload or short circuit condition occurs, the electromagnetic coil is electrified to generate a reverse magnetic field, so that the attraction force of the permanent magnet to the movable iron core 62 is greatly reduced, and the movable iron core 62 is released, and the trip member 5 is ejected outwards under the action of the elastic force of the third elastic member 61 to trip. The third elastic member 61 may employ a spring.

Further, as shown in fig. 2, the snap-fastener 5 includes a snap-fastener plate 51, a second rotating shaft 52 and a second elastic member 53, where the snap-fastener plate 51 is generally L-shaped, and one end of the snap-fastener plate 51 can be selectively fastened to the ejector 3, and the other end is disposed opposite to the driving end of the electromagnetic driving member 6. The second rotating shaft 52 is rotatably connected to the mounting frame 1, the jump buckle plate 51 is fixedly connected to the second rotating shaft 52, and the electromagnetic driving piece 6 can drive the jump buckle plate 51 to drive the second rotating shaft 52 to rotate relative to the mounting frame 1, so that the jump buckle plate 51 is released from buckling with the ejection piece 3. The second elastic member 53 is sleeved on the second rotating shaft 52, one end of the second elastic member 53 is hung on the mounting frame 1, the other end of the second elastic member abuts against the jump buckle plate 51, and when the electromagnetic driving member 6 is powered off, the second elastic member 53 applies force to the jump buckle plate 51 so that the jump buckle plate 51 can be kept at a position buckled with the ejection member 3. The second elastic member 53 may employ a spring.

Specifically, as shown in fig. 4, the second rotating shaft 52 is rotatably disposed between the first plate 111 and the third plate 113 of the mounting frame 1, the connecting plate 13 is disposed near the second rotating shaft 52 and is configured as a U-shaped clamping plate, and the U-shaped clamping plate is fastened to the outer sides of the first plate 111 and the second plate 112 to connect and fix the first plate 111 and the second plate 112 so as to ensure the mounting stability of the jump fastener 5.

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. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. 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 magnetic flux release, its characterized in that includes:

a mounting frame (1);

the pushing piece (2) comprises a pushing rod main body (21), a pushing arm (22) and a transmission arm (23), wherein the pushing rod main body (21) is rotatably arranged on the mounting frame (1), and the pushing arm (22) and the transmission arm (23) are arranged on the pushing rod main body (21);

the device comprises an ejection piece (3) and a first elastic piece (4), wherein the ejection piece (3) is movably arranged on the mounting frame (1), the first elastic piece (4) is arranged between the ejection piece (3) and the mounting frame (1), the first elastic piece (4) can eject the ejection piece (3) to enable the ejection piece (3) to push the transmission arm (23) to rotate, and the pushing arm (22) can enable the transmission arm (23) to push the ejection piece (3) to compress the first elastic piece (4) under the pushing and rotating;

the jump fastener (5) is rotationally arranged on the mounting frame (1), and the jump fastener (5) can selectively lock and limit the ejection piece (3) compressing the first elastic piece (4);

the electromagnetic driving piece (6) is arranged on the mounting frame (1), and the electromagnetic driving piece (6) can drive the jump fastener (5) to rotate so as to unlock the ejection piece (3).

2. The magnetic flux trip of claim 1, wherein the pusher (2) further comprises a limiting plate (24), the limiting plate (24) being disposed on the push rod body (21), the limiting plate (24) being configured to limit a rotation angle range of the push rod body (21).

3. The magnetic flux trip according to claim 2, wherein the mounting frame (1) comprises a mounting frame main body (11) and two support plates (12), the two support plates (12) are arranged on the mounting frame main body (11) at intervals, mounting holes (121) are formed in the support plates (12), the push rod main body (21) is rotationally connected to the mounting holes (121) through a first rotating shaft (25), at least one end, along the axial direction of the first rotating shaft (25), of the push rod main body (21) is provided with a limiting plate (24), and the limiting plate (24) can be abutted against the support plates (12) to limit the rotation of the pushing piece (2).

4. A magnetic flux trip according to claim 3, characterized in that the pushing arm (22) and the transmission arm (23) are located at one end of the push rod main body (21) facing away from the limiting plate (24), the pushing arm (22) and the transmission arm (23) are located at two ends of the push rod main body (21) along the axial direction of the first rotating shaft (25), and a preset included angle beta is formed between the extending directions of the pushing arm (22) and the transmission arm (23).

5. The magnetic flux trip of claim 4, wherein the predetermined angle β is 90 °.

6. The magnetic flux trip of claim 3, further comprising:

the shielding cover (7), shielding cover (7) with mounting bracket (1) enclose into the shielding space, electromagnetic coil of electromagnetic drive piece (6) set up in the shielding space.

7. The magnetic flux trip of claim 6, wherein the shielding case (7) is set to be U-shaped, a U-shaped space is also provided on the mounting frame main body (11), the shielding case (7) and the U-shaped opening of the mounting frame main body (11) are located at two opposite sides of the shielding space, and the U-shaped wall (72) of the shielding case (7) is bent into the mounting frame main body (11) and is abutted against the inner wall of the mounting frame main body (11).

8. The magnetic flux trip of claim 7, wherein the mounting frame body (11) includes a first plate (111), a second plate (112) and a third plate (113) that are connected in sequence, the first plate (111) and the third plate (113) are arranged in parallel, the first plate (111), the second plate (112) and the third plate (113) enclose the U-shaped space, the mounting frame (1) further includes a connecting plate (13), and the connecting plate (13) connects one ends of the first plate (111) and the third plate (113) far away from the second plate (112).

9. The magnetic flux trip of any one of claims 1-8, wherein the trip element (5) comprises:

one end of the jump buckle plate (51) can be selectively buckled with the ejection piece (3), and the other end of the jump buckle plate is opposite to the driving end of the electromagnetic driving piece (6);

the second rotating shaft (52) is rotationally connected to the mounting frame (1), the jump buckle plate (51) is fixedly connected to the second rotating shaft (52), and the electromagnetic driving piece (6) can drive the jump buckle plate (51) to drive the second rotating shaft (52) to rotate relative to the mounting frame (1), so that the jump buckle plate (51) is unlocked from being buckled with the ejection piece (3);

the second elastic piece (53) is sleeved on the second rotating shaft (52), one end of the second elastic piece (53) is hung on the mounting frame (1), the other end of the second elastic piece is propped against the jump buckle plate (51), and when the electromagnetic driving piece (6) is in power failure, the second elastic piece (53) applies force to the jump buckle plate (51) so that the jump buckle plate (51) can be kept at a position buckled with the ejection piece (3).

10. Circuit breaker comprising an actuator (200), said actuator (200) being adapted to regulate the on-off of said circuit breaker, characterized in that it further comprises a magnetic flux release according to any one of claims 1 to 9, said pushing arm (22) of said magnetic flux release being in contact with said actuator (200).

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