CN210984667U - Magnetic flux converter of circuit breaker - Google Patents

Abstract

A magnetic flux converter of a circuit breaker belongs to the technical field of low-voltage electrical appliances. The magnetic flux converter comprises an electromagnetic mechanism, a tripping push rod matched with a movable iron core of the electromagnetic mechanism, and a tripping spring which is sleeved on the movable iron core of the electromagnetic mechanism and used for pushing the tripping push rod, and is characterized in that: the tripping push rod comprises a wheel-shaped body, wherein a cross groove is formed in the center of one surface of the wheel-shaped body, which faces away from the electromagnetic mechanism, one groove in the cross groove is a through groove which penetrates through the wheel-shaped body, the other groove is a sinking groove, the matched end part of the movable iron core and the matched end part of the tripping push rod is a matched end part, the matched end part can penetrate through the through groove, and after the matched end part penetrates through the through groove, the matched end part of the movable iron core rotates to the position where the sinking groove is aligned, so that the matched end part sinks into the sinking groove, and the movable iron core. The advantages are that: the number of parts is small, the assembly is simple, and the structure is compact.

Description

Magnetic flux converter of circuit breaker

Technical Field

The utility model belongs to the technical field of low-voltage apparatus, concretely relates to magnetic flux converter of circuit breaker.

Background

With the rapid and wide application of electronic technology in the field of low-voltage electrical appliances, the intelligent circuit breaker is a novel circuit breaker produced according to market demands, the protection function of the intelligent circuit breaker is intelligent, the size of the intelligent circuit breaker is miniaturized, and the intelligent circuit breaker is the mainstream direction of the development of circuit breakers in future. The magnetic flux converter is a key actuator of the intelligent circuit breaker, and is known as follows: the magnetic attraction type magnetic iron mainly comprises a permanent magnet, an electromagnetic coil, a movable iron core and a spring, wherein in a normal condition, the movable iron core is kept at an attraction position under the action of the attraction force of the permanent magnet. When overload or short circuit occurs, the mutual inductor sends an overload or short circuit current signal to the electronic release, then a CPU of the electronic release sends an electronic pulse signal to the magnetic flux converter to electrify the electromagnetic coil and generate magnetic flux opposite to the magnetic flux generated by the permanent magnet in the magnetic yoke, so that the attraction force of the permanent magnet to the movable iron core is greatly reduced, and at the moment, because the elastic force of the spring is greater than the attraction force of the permanent magnet to the movable iron core, the movable iron core is released and popped outwards, and an actuating mechanism of the circuit breaker is driven to break the circuit.

For another example, chinese utility model patent publication No. CN201017832Y discloses a magnetic flux converter, which includes a base frame, a trigger mechanism and a second-stage amplification tripping mechanism, and the structure has the advantages that: the large and stable tripping force can be output, and meanwhile, the output tripping force is not limited by the output mechanical work when the movable iron core is popped out from the coil. However, the above structure has the following disadvantages in practical use: the number of parts is large, the assembly process is complex, and the volume is large.

In view of the above-mentioned prior art, there is a need for a reasonable improvement of the structure of the magnetic flux transformer of the existing circuit breaker. The applicant has therefore made an advantageous design, in the context of which the solution to be described below is made.

Disclosure of Invention

The utility model aims at providing a magnetic flux converter of circuit breaker, it can solve the above-mentioned defect that prior art exists, has spare part advantage small in quantity, simple, compact structure, small.

The utility model aims to achieve the aim that the magnetic flux converter of the circuit breaker comprises an electromagnetic mechanism, a tripping push rod matched with a movable iron core of the electromagnetic mechanism and a tripping spring sleeved on the movable iron core of the electromagnetic mechanism and used for pushing the tripping push rod to provide tripping force for the circuit breaker, the tripping push rod comprises a wheel-shaped body, wherein a cross groove is formed in the center of one surface of the wheel-shaped body, which is back to the electromagnetic mechanism, one groove of the cross groove is a through groove which penetrates through the wheel-shaped body, the other groove crossed with the through groove is a sinking groove, one end of the movable iron core matched with the tripping push rod is a matching end part, the matching end part can penetrate through the through groove, after the matching end part penetrates through the through groove, the matching end part of the movable iron core is rotated to the position aligned with the sink groove, so that the matching end part sinks into the sink groove, and the movable iron core and the tripping push rod are fixed.

In a specific embodiment of the present invention, the through groove and the sinking groove intersect at an angle of 90 °.

In another specific embodiment of the present invention, the tripping push rod further has a tripping rod and a reset rod, the tripping rod and the reset rod extend from the wheel-shaped body of the tripping push rod toward a direction away from the electromagnetic mechanism, the circuit breaker includes a traction rod for tripping the circuit breaker and a lever for resetting the circuit breaker, and the tripping rod cooperates with the traction rod of the circuit breaker to cause the circuit breaker to trip; the reset rod is matched with a lever of the circuit breaker to enable the magnetic flux converter to return to a suction state.

In another specific embodiment of the present invention, the trip bar has a trip surface contacting with a draw bar of the circuit breaker, the reset bar has a reset surface contacting with a lever of the circuit breaker, when the magnetic flux transformer is operated, the movable iron core of the electromagnetic mechanism is released, the trip bar of the trip push rod moves under the action of the trip force of the trip spring, and the trip surface of the trip bar contacts with the draw bar of the circuit breaker and pushes the circuit breaker to unlock, so as to trip the circuit breaker; the release mechanism comprises a release push rod, a release spring, a movable iron core, a release spring, a pull rod and a release spring, wherein the release rod is matched with the lever of the circuit breaker, when the circuit breaker is buckled again, the lever of the circuit breaker is in contact with the reset surface of the release push rod and resists the acting force of the release spring to push the release push rod to reset and move, the movable iron core of the electromagnetic mechanism is pushed to reset, the.

In the utility model discloses a still another concrete embodiment, magnetic flux converter still include the support that constitutes by yoke iron lid and yoke iron, electromagnetic mechanism arrange in the support, electromagnetic mechanism still include coil, coil skeleton, quiet iron core, permanent magnet, the coil winding on coil skeleton, movable iron core and quiet iron core arrange the hollow die cavity of coil skeleton in, the permanent magnet setting in the below of quiet iron core.

In yet another specific embodiment of the present invention, the housing of the yoke is a semi-enclosed structure.

In yet another specific embodiment of the present invention, the housing of the yoke has a U-shaped structure.

In a more specific embodiment of the present invention, the housing of the yoke is a fully-enclosed structure.

In yet another specific embodiment of the present invention, the wheel-shaped body has an annular accommodating cavity for accommodating the trip spring on a surface facing the electromagnetic mechanism, the trip spring is disposed between the trip push rod and the support, one end of the trip spring abuts against the yoke cover of the support, and the other end of the trip spring abuts against the trip push rod.

In the present invention, the circuit breaker further includes an electronic release, the electronic release includes a magnetic flux transformer and a housing, the magnetic flux transformer is installed in the cavity of the housing, an elastic locking pin is disposed in the cavity, and after the magnetic flux transformer is installed in place, the magnetic flux release will not fall out after being matched with the elastic locking pin, so as to achieve positioning.

The utility model adopts the structure, has one of the advantages that the rotary installation of the movable iron core of the electromagnetic mechanism is realized by arranging the through groove and the sinking groove on the tripping push rod, the structure of the magnetic flux converter is greatly simplified, and the magnetic flux converter has the advantages of small number of parts, simple assembly, compact structure and small volume; the second advantage, the arrangement of the elastic clamping pin on the housing makes the installation of the magnetic flux converter simpler and more convenient; and thirdly, the semi-surrounding structure of the bracket in the magnetic flux converter has great significance for the development requirement of the small-specification electronic circuit breaker on more exquisite size.

Drawings

Fig. 1 is a schematic structural diagram of the circuit breaker of the present invention.

Fig. 2 is a side view of the circuit breaker of the present invention.

Fig. 3 is a schematic view of the assembly of the magnetic flux transformer and the housing according to the present invention.

Fig. 4 is a side view of the magnetic flux transformer assembled with the housing according to the present invention.

Fig. 5 is a cross-sectional view a-a of the flux transformer of fig. 4 assembled with a housing.

Fig. 6 is a schematic diagram of the magnetic flux transformer assembled on the explosion side.

Fig. 7 is a schematic diagram of the other side of the magnetic flux transformer assembled explosion.

Fig. 8 is a schematic structural view of the magnetic flux converter movable iron core aligning to the through groove in the cross groove.

Fig. 9 is a schematic structural view of the magnetic flux converter movable iron core of the present invention passing through the through groove in the cross groove.

Fig. 10 is a schematic structural view of the magnetic flux converter movable iron core rotating 90 degrees.

Fig. 11 is the magnetic flux converter moves the iron core and gets into the heavy groove in the cross slot, realizes fixed schematic diagram.

Fig. 12 is a schematic view of a side structure of the trip push rod of the present invention.

Fig. 13 is a schematic view of another side structure of the trip push rod of the present invention.

Fig. 14 is a schematic structural view of the trip rod according to the present invention.

Fig. 15 is a cross-sectional view of the through slot B-B of the trip bar of fig. 14.

Fig. 16 is a cross-sectional view of a sink C-C of the trip bar of fig. 14.

Fig. 17 is a schematic structural diagram of the magnetic flux converter of the present invention.

Fig. 18 is a cross-sectional view of the magnetic flux transformer of the present invention in a released state.

Fig. 19 is a cross-sectional view of the magnetic flux transformer in the attraction state according to the present invention.

In the figure: 1. the magnetic flux converter comprises a magnetic flux converter, 11 parts of a bracket, 111 parts of a yoke iron cover, 112 parts of a yoke iron, 12 parts of an electromagnetic mechanism, 121 parts of a movable iron core, 1211 parts of a linear flat head, 122 parts of a coil, 123 parts of a coil framework, 1231 parts of a cavity, 124 parts of a static iron core and 125 parts of a permanent magnet; 13. the trip push rod, 130, a wheel-shaped body, 1301, a disc, 1302, a small circular ring boss, 1303, a large circular ring boss, 131, an annular accommodating cavity, 132, a cross groove, 1321, a through groove, 1322, a sinking groove, 133, a trip rod, 1331, a trip surface, 134, a reset rod, 1341, a reset surface, 14, a trip spring; 2. the shell, 21, the cavity, 22, the elastic clamping pin; 3. a draw bar; 4. a lever.

Detailed Description

The following detailed description of the embodiments of the present invention will be described with reference to the accompanying drawings, but the description of the embodiments by the applicant is not intended to limit the technical solutions, and any changes made according to the present invention rather than the essential changes should be considered as the protection scope of the present invention.

As shown in fig. 1 to 5, the present invention relates to a magnetic flux release of a circuit breaker, in this embodiment, the circuit breaker is an electronic circuit breaker, the electronic circuit breaker includes an electronic release, the electronic release has a housing 2 and a magnetic flux converter 1 installed in the housing 2, the magnetic flux converter 1 is used for driving the circuit breaker to perform a releasing action. As shown in fig. 3 to 5, a cavity 21 is formed in the housing 2, an elastic clip 22 is convexly disposed in the cavity 21, and after the magnetic flux converter 1 is assembled in place, the magnetic flux converter 1 is mounted in the cavity 21 in the housing 2 and cannot fall out after being matched with the elastic clip 22, so that positioning is achieved.

As shown in fig. 6 to 19, the magnetic flux converter 1 includes a bracket 11, an electromagnetic mechanism 12, a trip push rod 13, and a trip spring 14, the bracket 11 is composed of a yoke cover 111 and a yoke 112, the yoke 112 has two types of housing forms, one is a half-enclosed structure, the processing is simple, and the magnetic flux converter is suitable for a small-housing circuit breaker; the other type is a full-surrounding structure, the processing is complex, the external magnetic field shielding performance is high, and the circuit breaker is suitable for a large-shell-frame circuit breaker, and the circuit breaker is preferably of the former type, and is particularly of a U-shaped structure. The yoke cover 111 seals the opening of the yoke 112.

As shown in fig. 17 to 19, the electromagnetic mechanism 12 is disposed in the bracket 11, the electromagnetic mechanism 12 includes a movable iron core 121, a coil 122, a coil bobbin 123, a stationary iron core 124, and a permanent magnet 125, the coil 122 is wound on the coil bobbin 123, the movable iron core 121 and the stationary iron core 124 are disposed in a hollow cavity 1231 of the coil bobbin 123, and the permanent magnet 125 is disposed below the stationary iron core 124.

As shown in fig. 6 to 11, the trip push rod 13 is engaged with the plunger 121, and the trip push rod 13 includes a wheel-shaped body 130, and a trip rod 133 and a reset rod 134 extending from the wheel-shaped body 130. The wheel-shaped body 130 of the trip push rod 13 is provided with an annular accommodating cavity 131 for accommodating the trip spring 14 on a surface facing the electromagnetic mechanism 12. The wheel-shaped body 130 of the trip push rod 13 is provided with cross grooves 132 in the center of the surface facing away from the electromagnetic mechanism 12, one of the cross grooves 132 is a through groove 1321 penetrating through the wheel-shaped body 130, and the other cross groove with the through groove 1321 is a sinking groove 1322. In this embodiment, the through slot 1321 and the sinking slot 1322 intersect with each other at an angle of 90 °. The end of the movable iron core 121, which is matched with the trip push rod 13, is a matching end, the matching end can pass through the through slot 1321, and after the matching end passes through the through slot 1321, the matching end of the movable iron core 121 is rotated to a position aligned with the sinking slot 1322, so that the matching end is sunk into the sinking slot 1322, and the movable iron core 121 and the trip push rod 13 are fixed. The fitting end of the movable iron core 121 is preferably a straight flat head 1211, but may have other shapes as long as the movable iron core 121 passes through the through slot 1321 and then rotates by a certain angle to sink into the sinking slot 1322 to connect the trip push rod 13 with the movable iron core. In this embodiment, the through slot 1321 of the trip push rod 13 can accommodate the flat head 1211 of the movable iron core 121, the flat head 1211 can pass through the through slot 1321, and after the flat head 1211 passes through the through slot 1321, the flat head 1211 of the movable iron core 121 is rotated to a position aligned with the sinking slot 1322, at this time, the flat head 1211 sinks into the sinking slot 1322, so that the movable iron core 121 and the trip push rod 13 are fixed. In this embodiment, the through slot 1321 and the sinking slot 1322 intersect at an angle of 90 °, so that the flat head 1211 of the movable iron core 121 can be aligned to the sinking slot 1322 by rotating 90 °. The tripping spring 14 is sleeved on the outer ring of the movable iron core 121 of the electromagnetic mechanism 12, and is arranged between the tripping push rod 13 and the bracket 11, one end of the tripping spring abuts against the yoke cover 111 of the bracket 11, and the other end of the tripping spring abuts against the tripping push rod 13 to provide tripping force. In this embodiment, the wheel-shaped body 130 of the trip push rod 13 is composed of a circular disc 1301, a small circular boss 1302 protruding from the middle of the circular disc 1301, and a large circular boss 1303 protruding from the outer edge of the circular disc 1301. When the movable core 121 and the stationary core 124 are attracted, the small circular boss 1302 may penetrate through the yoke cover 111 and enter the bracket 11, and the through slot 1321 penetrates through the center of the small circular boss 1302.

As shown in fig. 6 to 16, the trip bar 133 and the reset bar 134 extend from the wheel-shaped body 130 of the trip push rod 13 toward a direction away from the electromagnetic mechanism 12. When the magnetic flux converter 1 operates, the movable iron core 121 of the electromagnetic mechanism 12 is released, the trip bar 133 of the trip push rod 13 moves under the action of the trip force of the trip spring 14, and the trip surface 1331 of the trip bar 133 contacts with the traction rod 3 of the circuit breaker and pushes the circuit breaker to be unlocked, so that the circuit breaker is tripped; the reset rod 134 is matched with the lever 4 of the circuit breaker to return the magnetic flux converter to the attraction state. When the circuit breaker is buckled again, the lever 4 of the circuit breaker contacts with the reset face 1341 of the reset rod 134 of the trip push rod 13 and resists the acting force of the trip spring 14 to push the trip push rod 13 to reset and move, and push the movable iron core 121 of the electromagnetic mechanism 12 to reset, meanwhile, the trip spring 14 compresses and stores energy, the trip face 1331 of the trip push rod 13 is separated from the draw bar 3 of the circuit breaker, the draw bar 3 resets, and the circuit breaker reaches a buckled state again.

Referring to fig. 1 to fig. 16, the assembly process of the trip rod 13 and the bracket 11 of the present invention is as follows: the permanent magnet motor 12 is installed in the bracket 11, and a linear flat head 1211 of a movable iron core 121 of the permanent magnet motor 12 extends out of the yoke cover 111 of the bracket 11. Next, the in-line flat head 1211 of the movable iron core 121 is aligned with the through slot 1321 of the trip push rod 13, inserted into the through slot 1321 until the in-line flat head 1211 is exposed from the other end of the through slot 1321, and then the flat head 1211 is clamped by a tool (such as a nipper or others), and the movable iron core 121 is rotated by 90 ° so that the flat head 1211 is aligned with the sinking slot 1322. When the movable iron core 121 is released, the movable iron core 121 is attracted under the action of the magnetic field, sinks into the sinking groove 1322, and is clamped with the sinking groove 1322, so that the assembly is completed. When the magnetic flux converter 1 is assembled in the cavity 21 of the housing 2, the magnetic flux converter 1 is limited by the elastic clamping pin 22 after being installed in place, so that the assembly is convenient; when the magnetic flux converter is disassembled, the elastic clamping foot 22 is pressed reversely by a tool, and then the magnetic flux converter 1 can be moved out.

Claims (10)

1. The utility model provides a magnetic flux converter of circuit breaker, magnetic flux converter (1) including electromagnetic mechanism (12), with movable iron core (121) complex dropout push rod (13) of electromagnetic mechanism (12) and cover establish and be used for promoting dropout push rod (13) to provide tripping force's tripping spring (14) for circuit breaker on movable iron core (121) of electromagnetic mechanism (12), its characterized in that: the tripping push rod (13) comprises a wheel-shaped body (130), wherein a cross groove (132) is formed in the center of one surface of the wheel-shaped body (130) facing away from the electromagnetic mechanism (12), one groove of the cross groove (132) is a through groove (1321) penetrating through the wheel-shaped body (130), the other groove intersecting with the through groove (1321) is a sinking groove (1322), one end of the movable iron core (121) matched with the tripping push rod (13) is a matching end part, the matching end part can penetrate through the through groove (1321), and after the matching end part penetrates through the through groove (1321), the matching end part of the movable iron core (121) is rotated to the position aligned with the sinking groove (1322) to enable the matching end part to sink into the sinking groove (1322), so that the movable iron core (121) and the tripping push rod (13) are fixed.

2. Flux transformer for a circuit breaker according to claim 1, characterized in that the through slot (1321) and the countersunk slot (1322) intersect at an angle of 90 °.

3. The magnetic flux transformer of the circuit breaker according to claim 1, wherein said trip push rod (13) further has a trip bar (133) and a reset bar (134), said trip bar (133) and reset bar (134) extending from a wheel-shaped body (130) of the trip push rod (13) toward a direction away from the electromagnetic mechanism (12), said circuit breaker including a pull rod (3) for tripping the circuit breaker and a lever (4) for resetting the circuit breaker, said trip bar (133) cooperating with the pull rod (3) of the circuit breaker to cause the circuit breaker to trip; the reset rod (134) is matched with a lever (4) of the circuit breaker to enable the magnetic flux converter to return to the attraction state.

4. The magnetic flux transformer of the circuit breaker according to claim 3, characterized in that the trip bar (133) is provided with a trip surface (1331) contacting with the draw bar (3) of the circuit breaker, the reset bar (134) is provided with a reset surface (1341) contacting with the lever (4) of the circuit breaker, when the magnetic flux transformer (1) is operated, the movable iron core (121) of the electromagnetic mechanism (12) is released, the trip bar (133) of the trip push rod (13) moves under the action of the trip force of the trip spring (14), the trip surface (1331) of the trip bar (133) contacts with the draw bar (3) of the circuit breaker and pushes the circuit breaker to be unlocked, so that the circuit breaker is tripped; the reset rod (134) is matched with a lever (4) of the circuit breaker, when the circuit breaker is buckled again, the lever (4) of the circuit breaker is contacted with a reset surface (1341) of the reset rod (134) of the tripping push rod (13) and resists the acting force of a tripping spring (14) to push the tripping push rod (13) to reset and move, a movable iron core (121) of the electromagnetic mechanism (12) is pushed to reset, meanwhile, the tripping spring (14) compresses stored energy, the tripping surface (1331) of the tripping push rod (13) is separated from a draw bar (3) of the circuit breaker, the draw bar (3) resets, and the circuit breaker reaches the buckled state again.

5. The magnetic flux transformer of the circuit breaker according to claim 1, wherein the magnetic flux transformer (1) further comprises a support (11) formed by a yoke cover (111) and a yoke (112), the electromagnetic mechanism (12) is disposed in the support (11), the electromagnetic mechanism (12) further comprises a coil (122), a coil bobbin (123), a stationary core (124) and a permanent magnet (125), the coil (122) is wound on the coil bobbin (123), the movable core (121) and the stationary core (124) are disposed in a hollow cavity (1231) of the coil bobbin (123), and the permanent magnet (125) is disposed below the stationary core (124).

6. The magnetic flux transformer of the circuit breaker according to claim 5, characterized in that the housing of the yoke (112) is a half-enclosed structure.

7. The magnetic flux transformer of the circuit breaker according to claim 6, characterized in that the housing of the yoke (112) is of a U-shaped configuration.

8. The magnetic flux transformer of a circuit breaker according to claim 5, characterized in that the housing of the yoke (112) is of a fully enclosed construction.

9. The magnetic flux transformer of a circuit breaker according to claim 5, characterized in that the wheel-shaped body (130) is provided with an annular receiving chamber (131) for receiving the trip spring (14) on a surface facing the electromagnetic mechanism (12), the trip spring (14) is arranged between the trip push rod (13) and the bracket (11), one end of the trip spring abuts against the yoke cover (111) of the bracket (11), and the other end abuts against the trip push rod (13).

10. The magnetic flux transformer of the circuit breaker according to any one of claims 1 to 9, wherein the circuit breaker has an electronic release, the electronic release comprises the magnetic flux transformer (1) and a housing (2), the magnetic flux transformer (1) is installed in a cavity (21) of the housing (2), an elastic clamping pin (22) is convexly arranged in the cavity (21), and when the magnetic flux transformer (1) is installed in place, the magnetic flux transformer (1) cannot fall out after being matched with the elastic clamping pin (22) to realize positioning.

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