CN220420519U

CN220420519U - Magnetic circuit mechanism of electromagnetic release and electromagnetic release

Info

Publication number: CN220420519U
Application number: CN202321406115.1U
Authority: CN
Inventors: 郑清清; 谭忠华; 林正极
Original assignee: Xiamen Hongfa Electroacoustic Co Ltd
Current assignee: Xiamen Hongfa Electroacoustic Co Ltd
Priority date: 2023-06-05
Filing date: 2023-06-05
Publication date: 2024-01-30
Anticipated expiration: 2033-06-05

Abstract

The utility model discloses a magnetic circuit mechanism of an electromagnetic release and the electromagnetic release, which comprises two magnetic yokes, permanent magnets, coils, armatures and rivets, wherein the rivets are non-magnetic rivets, the magnetic yokes comprise main body parts, the main body parts of the two magnetic yokes are oppositely arranged, a magnetic isolation air gap is formed between the two magnetic yokes, the permanent magnets are positioned on one sides of the two magnetic yokes and are attached to the surfaces of the two magnetic yokes, the coils are arranged on one side of the main body parts, which is far away from the permanent magnets, the main body parts are provided with magnetic isolation supporting blocks and polar convex blocks, the armatures are elastically and rotatably arranged on the magnetic isolation supporting blocks, the armatures are movably matched with the polar convex blocks of the two magnetic yokes, the main body parts of the two magnetic yokes are respectively provided with mutually corresponding riveting holes, and the rivets penetrate the riveting holes to realize mutual riveting of the two magnetic yokes. The utility model avoids the formation of a structure similar to a magnetic short circuit by the contact of the two magnetic yokes, ensures the magnetic flux in a complete large magnetic loop, improves the magnetic efficiency of the product, and ensures the connection of the two magnetic yokes to be more firm, stable and reliable.

Description

Magnetic circuit mechanism of electromagnetic release and electromagnetic release

Technical Field

The utility model relates to the technical field of electromagnetic releases, in particular to a magnetic circuit mechanism of an electromagnetic release and the electromagnetic release.

Background

The electromagnetic residual current circuit breaker does not need an auxiliary power supply for operation, has simple structure, high compressive strength, strong electromagnetic interference resistance, reliable operation and wide application, and is not influenced by power supply voltage fluctuation. In order to improve the action sensitivity and stability, an electromagnetic release is used as a key element of an electromagnetic residual current circuit breaker, and is an important point for improvement.

The improvement of the magnetic circuit mechanism of the electromagnetic release plays a decisive role in improving the magnetic efficiency and stability. The existing magnetic circuit mechanism of the release generally adopts a mode of arranging a non-magnetic air gap between two magnetic yokes to separate two polar plates and connects the two polar plates through laser welding, thereby forming magnetic resistance with specified size and preventing permanent magnet from being fed into a magnetic circuit from permanent magnets to short-circuit. Fig. 1-4 show a magnetic circuit mechanism of a conventional electromagnetic release, which comprises a first magnetic yoke 1', a second magnetic yoke 2', a permanent magnet 4', an armature 5', a magnetism isolating support block 6', a welding point 7', a first polarity bump 8', a second polarity bump 9', an elastic member 10', a coil frame 11', a housing 12', a push rod 13', a coil 14', and two magnetic yoke main bodies 15', wherein the two magnetic yokes are oppositely arranged, a magnetism isolating air gap 3' is formed between the two magnetic yoke main bodies 15', the two magnetic yokes are fixedly connected by laser welding, and three welding points 7' are formed after welding, the permanent magnet 4' is positioned at the bending parts 16' of the two magnetic yokes and is adhered to the surfaces of the magnetic yokes. The armature 5' rotates around the edge of the magnetism isolating support block 6', and the armature 5' can rotate to be in contact fit with the first polar lug 8' of the first magnetic yoke 1' and the second polar lug 9' of the second magnetic yoke 2' so as to realize switch closing reset.

The complete large magnetic circuit of the magnetic circuit mechanism of the electromagnetic release is as follows: the permanent magnet 4'→the first yoke 1' →the first polar bump 8'→the armature 5' →the second polar bump 9'→the second yoke 2' →the permanent magnet 4', but since the laser welding point itself is a magnetic short-circuit point, when the two yokes are welded and fixed, the welding point 7' will make the two yokes contact to form a structure similar to a magnetic short circuit, so that part of the magnetic flux will flow back to the permanent magnet 4 'directly through the welding point 7', as shown by the arrow route in fig. 1, namely, part of the magnetic circuit is: the permanent magnet 4 '. Fwdarw.the first magnetic yoke 1 '. Fwdarw.the welding point 7 '. Fwdarw.the second magnetic yoke 2 '. Fwdarw.the permanent magnet 4' leads to a reduced magnetic flux in the complete large magnetic circuit, influences the magnetic efficiency of the product, and in order to ensure stable magnetic resistance and avoid magnetic short circuit problems, the size of the welding point 7' and the size of the magnetism isolating air gap 3' are also required to be strictly controlled, and in order to ensure firm connection of the magnetic circuit, a plurality of welding points are required to be welded, so that the requirements on energy regulation of welding equipment and positioning precision of a fixture are very high, the whole process is complex, the production efficiency is low, and the consistency of stability and firmness after welding is difficult to ensure.

Disclosure of Invention

The utility model aims to provide a magnetic circuit mechanism of an electromagnetic release to solve the technical problems.

In order to achieve the above purpose, the technical scheme of the utility model is as follows: the utility model provides a magnetic circuit mechanism of electromagnetic type release, including two yokes, permanent magnet, the coil, armature and rivet, the rivet is non-magnetic conduction rivet, the yoke includes main part, the main part of two yokes sets up relatively and is formed with the magnetism isolation air gap between the two, permanent magnet is located one side of two yokes and laminates mutually with two yoke surfaces, the coil sets up one side of keeping away from permanent magnet in the main part, be provided with magnetism isolation supporting shoe and polarity lug in the main part, armature elastic rotation sets up on magnetism isolation supporting shoe, and armature and the polarity lug movable fit of two yokes, be equipped with the riveting hole that corresponds each other in the main part of two yokes respectively, the rivet penetrates the riveting hole in order to realize riveting each other with two yokes.

In one embodiment, a magnetic shield is disposed within the magnetic shield air gap between the body portions of the two yokes.

In one embodiment, the caulking holes are provided at positions of the body portions of the two yokes corresponding to the magnetism insulator.

In one embodiment, the magnetic isolation support block and the polar bump are both disposed on the top side of the main body, and the polar bump is closer to the coil than the magnetic isolation support block, and the armature is located above the coil.

In one embodiment, the yoke further includes a bending portion extending obliquely along one side of the main body portion, and the permanent magnet is fitted between the bending portions of the two yokes.

In one embodiment, the bending portions of the two yokes are gradually apart toward the extending direction.

In one embodiment, the two yokes are provided with a plurality of corresponding riveting holes on the main body parts, the riveting holes are positioned on the inner sides of the main body parts of the two yokes, and rivets penetrate through the riveting holes to rivet the two yokes.

In one embodiment, the rivet is a copper rivet.

In one embodiment, the top surfaces of the polar projections on the main body parts of the two yokes are in the same plane with the top surfaces of the magnetism isolating support blocks, and the bottom surfaces of the armatures are in movable contact fit with the top surfaces of the polar projections of the two yokes.

The utility model also provides an electromagnetic release, which comprises a shell, any one of the magnetic circuit mechanisms of the electromagnetic release, an elastic piece and a coil frame, wherein the magnetic circuit mechanism, the elastic piece and the coil frame are arranged in the shell, the coil frame and the two magnetic yokes are mutually assembled, the coil is wound on the coil frame, the elastic piece is arranged on the coil frame and is elastically matched with the armature, the elastic piece is used for driving the armature to elastically rotate upwards, a push rod hole is formed in the shell corresponding to the armature, and a push rod which is in abutting fit with the armature is arranged in the push rod hole in a penetrating manner.

The utility model has the following beneficial effects:

the utility model comprises two magnetic yokes, permanent magnets, coils, armatures and rivets, wherein the rivets are non-magnetic rivets, the magnetic yokes comprise main body parts, the main body parts of the two magnetic yokes are oppositely arranged, a magnetic isolation air gap is formed between the main body parts, the permanent magnets are positioned at one sides of the two magnetic yokes and are attached to the surfaces of the two magnetic yokes, the coils are arranged at one side of the main body parts, which are far away from the permanent magnets, the main body parts are provided with magnetic isolation supporting blocks and polar bumps, the armatures are elastically and rotatably arranged on the magnetic isolation supporting blocks, the armatures are movably matched with the polar bumps of the two magnetic yokes, the main body parts of the two magnetic yokes are respectively provided with mutually corresponding riveting holes, the rivets penetrate the riveting holes to realize the mutual riveting of the two magnetic yokes, the two magnetic yokes are fixedly connected in a non-magnetic rivet riveting mode, the riveting point is a non-magnetic short-circuit point, so that a structure similar to a magnetic short circuit can be avoided, partial magnetic flux sequentially passes through the first magnetic yoke, the riveting point and the second magnetic yoke, and finally, the phenomenon that the magnetic flux directly flows back to the permanent magnet is avoided, the magnetic flux path is ensured to be a complete large magnetic loop, namely, the permanent magnet, the first magnetic yoke, the first polarity protruding block, the armature, the second polarity protruding block, the second magnetic yoke and the permanent magnet, so that the magnetic flux in the complete large magnetic loop is ensured, the magnetic efficiency of a product is improved, the connection of the two magnetic yokes is ensured to be firmer, more stable and more reliable in a rivet riveting mode, the problem of magnetic short circuit can be avoided while the stable magnetic resistance is ensured, the whole process and the operation are simple, and the production efficiency is high.

Drawings

FIG. 1 is a schematic top view of a magnetic circuit mechanism of a conventional electromagnetic trip unit;

FIG. 2 is a schematic front view of a magnetic circuit mechanism of a conventional electromagnetic trip unit;

FIG. 3 is a schematic diagram of the internal structure of a conventional electromagnetic trip unit;

FIG. 4 is a schematic view of the external appearance of a conventional electromagnetic trip unit;

FIG. 5 is a schematic front view of a magnetic circuit mechanism of an electromagnetic trip unit of one embodiment of the present utility model;

FIG. 6 is a schematic top view of a magnetic circuit mechanism of an electromagnetic trip unit according to one embodiment of the present utility model;

FIG. 7 is a schematic diagram of an internal structure of an electromagnetic trip unit according to one embodiment of the present utility model;

fig. 8 is a schematic view of an external appearance of an electromagnetic trip unit according to an embodiment of the present utility model.

The drawings are marked:

the prior art part: 1 'a first magnetic yoke, 2' a second magnetic yoke, 3 'a magnetism isolating air gap, 4' a permanent magnet, 5 'an armature, 6' a magnetism isolating support block, 7 'a welding point, 8' a first polarity bump, 9 'a second polarity bump, 10' an elastic piece, 11 'a coil frame, 12' a shell, 13 'an ejector rod, 14' a coil, 15 'a main body part and 16' a bending part;

the utility model comprises the following steps: the magnetic field shielding device comprises a first magnetic yoke, a second magnetic yoke, a magnetic shielding plate 3, rivets 4, a permanent magnet 5, a magnetic shielding support block 6, an armature 7, a first polarity bump 8, a second polarity bump 9, an elastic piece 10, a coil frame 11, a shell 12, a push rod 13, a coil 14, a main body 15 and a bending part 16.

Detailed Description

For further illustration of the various embodiments, the utility model is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present utility model. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.

Referring to fig. 5 and 6, as an embodiment of the present utility model, there is provided a magnetic circuit mechanism of an electromagnetic release, including two yokes, a permanent magnet 5, a coil 14, an armature 7 and a rivet 4, wherein the rivet 4 is a non-magnetic rivet, the yokes include a main body 15, the main body 15 of the two yokes are disposed opposite to each other with a magnetic isolation air gap formed therebetween, the permanent magnet 5 is disposed at one side of the two yokes and is attached to the surfaces of the two yokes, the coil 14 is disposed at one side of the main body 15 away from the permanent magnet 5, the main body 15 is provided with a magnetic isolation support block 6 and a polar bump, the armature 7 is elastically rotatably disposed on the magnetic isolation support block 6, and the armature 7 is movably engaged with the polar bumps of the two yokes, thereby closing or opening of the electromagnetic release is achieved, the main body 15 of the two yokes are respectively provided with mutually corresponding riveting holes, and the rivet 4 penetrates the riveting holes to realize mutually riveting of the two yokes.

The working principle of the embodiment is as follows: when the electromagnetic release is switched on in a normal state, namely, under the action of magnetic attraction, the armature 7 is attracted to the polar projections of the two magnetic yokes, when a leakage signal is generated, the coil 14 generates a magnetic field opposite to the permanent magnet 5, when the leakage signal reaches a preset value, the magnetic field generated by the coil 14 weakens the attraction magnetic moment generated by the permanent magnet 5 to be insufficient to overcome the counter moment of the armature 7, so that the armature 7 elastically rotates upwards, the electromagnetic release is driven to switch off, and a fault circuit is cut off.

Above-mentioned technical scheme, two yokes are first yoke 1 and second yoke 2 respectively, the polarity lug on the first yoke 1 is first polarity lug 8, the polarity lug on the second yoke 2 is second polarity lug 9, realize two yokes fixed connection through non-magnetic conduction rivet riveted mode for the riveting point is non-magnetic short-circuit point, thereby can avoid two yokes to contact and form the structure of similar magnetic short-circuit, avoid partial magnetic flux to pass through first yoke 1 in proper order to the riveting point→second yoke 2, the phenomenon of direct backward flow permanent magnet 5 at last, guarantee that the magnetic flux route is following complete big magnetic circuit: the permanent magnet 5- & gt the first magnetic yoke 1- & gt the first polar lug 8- & gt the armature 7- & gt the second polar lug 9- & gt the second magnetic yoke 2- & gt the permanent magnet 5, thereby ensuring the magnetic flux in a complete large magnetic loop, improving the magnetic efficiency of the product, ensuring the connection of the two magnetic yokes to be more firm, stable and reliable in a riveting manner through the rivet 4, ensuring stable magnetic resistance and avoiding the problem of magnetic short circuit, and having simple whole process and operation and high production efficiency.

In this embodiment, be provided with in the magnetism isolating air gap between the main part 15 of two yokes and separate magnetic plate 3, the riveting hole sets up the position that corresponds magnetism isolating plate 3 at the main part 15 of two yokes, rivet 4 penetrates the riveting hole in order to realize riveting each other two yokes, this scheme makes two yokes more easily carry out riveting operation, riveting stability is higher, and avoid the magnetic flux short circuit of follow permanent magnet feed-in magnetic circuit, this combination mode technology is mature simultaneously, stability is high, it is more stable even to separate the control of magnetic distance, magnetic circuit magnetic resistance size uniformity is high, the whole magnetic efficiency of magnetic circuit and stability have been improved.

In this embodiment, the magnetism isolating support block 6 and the polarity bump are both disposed on the top side of the main body portion 15, and the polarity bump is closer to the coil 14 than the magnetism isolating support block 6, the armature 7 is located above the coil 14, the magnetic yoke further includes a bending portion 16 extending obliquely along one side of the main body portion 15, the main body portion 15 and the bending portion 16 are substantially L-shaped, the main body portion 15 is long plate-shaped, the bending portion 16 is short plate-shaped, and the permanent magnet 5 is attached between the bending portions 16 of the two magnetic yokes, so that a stable magnetic circuit can be formed between the two magnetic yokes and the permanent magnet 5.

In this embodiment, the bending portions 16 of the two yokes are gradually far away from each other toward the extending direction, and this arrangement ensures that the two main body portions 15 can be closer together, ensures stable riveting, and reduces the space volume of the electromagnetic release.

In this embodiment, the rivet 4 is a copper rivet, which has low cost and strong versatility, and of course, it is also possible to make the rivet of other non-magnetic materials such as aluminum, zinc, or nonmetal.

Because in the prior art, connect fixedly through laser welding mode to two yokes, in order to be convenient for weld, the welding point can only be the border position that sets up at the yoke, lead to the connection stability of two yokes not enough, therefore, in this embodiment, the riveting hole on the main part 15 of two yokes is a plurality of that correspond each other, and the riveting hole is located the inboard of the main part 15 of two yokes, rivet 4 penetrates the riveting hole in order to realize riveting two yokes each other, a plurality of riveting points keep away from the border position of two yokes promptly, the atress is more balanced, further guarantee the connection stability of two yokes.

In this embodiment, the first polar bump 8 of the first magnetic yoke 1, the second polar bump 9 of the second magnetic yoke 2 and the top surface of the magnetism isolating support block 6 are in the same plane, the bottom surface of the armature 7 is in movable contact fit with the top surfaces of the polar bumps of the two magnetic yokes to realize the closing or opening of the electromagnetic release, and the arrangement makes the armature 7 and the polar bumps be in plane fit, so that the contact is more accurate and stable.

Referring to fig. 7 and 8, the present utility model further provides an electromagnetic release, including a housing 12, a magnetic circuit mechanism of the electromagnetic release, an elastic member 10 and a coil frame 11 mounted in the housing 12, where the elastic member 10 is a torsion spring, the coil frame 11 is assembled with two yokes, a coil 14 is wound on the coil frame 11, the elastic member 10 is mounted on the coil frame 11 and is elastically matched with the armature 7, the elastic member 10 is used to drive the armature 7 to elastically rotate upwards, a push rod hole is disposed at a position corresponding to the armature 7 of the housing 12, a push rod 13 is disposed in the push rod hole in an abutting fit with the armature 7, the push rod 13 can press the armature 7 to rotate downwards, the armature 7 contacts and cooperates with a top surface of a polar bump to realize closing and resetting of the electromagnetic release, when a leakage signal reaches a preset value, the magnetic field generated by the coil 14 makes the attraction magnetic moment generated by the permanent magnet 5 weak enough to overcome the counter moment generated by the elastic member 10, and makes the armature 7 rotate under the elastic force of the elastic member 10, thereby breaking the electromagnetic release to break up the electromagnetic release.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The utility model provides a magnetic circuit mechanism of electromagnetic type release which characterized in that: including two yokes, permanent magnet, coil, armature and rivet, the rivet is non-magnetic conduction rivet, the yoke includes main part, the main part of two yokes sets up relatively and is formed with the magnetism separation air gap between the two, permanent magnet is located one side of two yokes and laminates mutually with two yoke surfaces, the coil sets up in the main part and keeps away from one side of permanent magnet, be provided with magnetism separation supporting shoe and polarity lug in the main part, armature elastic rotation sets up on magnetism separation supporting shoe, and armature and the polarity lug movable fit of two yokes, be equipped with the riveting hole that corresponds each other in the main part of two yokes respectively, the rivet penetrates the riveting hole in order to realize riveting two yokes each other.

2. The magnetic circuit mechanism of an electromagnetic trip according to claim 1 wherein: a magnetism isolating plate is arranged in the magnetism isolating air gap between the main body parts of the two yokes.

3. The magnetic circuit mechanism of an electromagnetic trip according to claim 2 wherein: the riveting holes are arranged at positions of the main body parts of the two magnetic yokes, which correspond to the magnetic isolation plates.

4. The magnetic circuit mechanism of an electromagnetic trip according to claim 1 wherein: the magnetism isolating support block and the polarity protruding block are arranged on the top side of the main body portion, the polarity protruding block is closer to the coil than the magnetism isolating support block, and the armature is located above the coil.

5. The magnetic circuit mechanism of an electromagnetic trip according to claim 1 wherein: the magnet yoke also comprises a bending part which extends obliquely along one side of the main body part, and the permanent magnet is attached between the bending parts of the two magnet yokes.

6. The magnetic circuit mechanism of the electromagnetic trip unit according to claim 5, wherein: the bending parts of the two magnetic yokes are gradually far away towards the extending direction.

7. The magnetic circuit mechanism of an electromagnetic trip according to claim 1 wherein: the riveting holes on the main body parts of the two magnetic yokes are a plurality of corresponding to each other, the riveting holes are positioned on the inner sides of the main body parts of the two magnetic yokes, and rivets penetrate the riveting holes to realize mutual riveting of the two magnetic yokes.

8. The magnetic circuit mechanism of an electromagnetic trip according to claim 1 wherein: the rivet is a copper rivet.

9. The magnetic circuit mechanism of an electromagnetic trip unit according to any one of claims 1-8 wherein: the top surfaces of the polar lugs on the main body parts of the two magnetic yokes are in the same plane with the top surfaces of the magnetism isolating support blocks, and the bottom surfaces of the armatures are in movable contact fit with the top surfaces of the polar lugs of the two magnetic yokes.

10. An electromagnetic release, characterized in that: the electromagnetic release comprises a shell, a magnetic circuit mechanism of the electromagnetic release according to any one of claims 1-9, an elastic piece and a coil frame, wherein the magnetic circuit mechanism, the elastic piece and the coil frame are arranged in the shell, the coil frame and the two magnetic yokes are mutually assembled, a coil is wound on the coil frame, the elastic piece is arranged on the coil frame and is elastically matched with an armature, the elastic piece is used for driving the armature to elastically rotate upwards, a push rod hole is formed in the position, corresponding to the armature, of the shell, and a push rod which is in abutting fit with the armature is arranged in the push rod hole in a penetrating manner.