CN215600179U

CN215600179U - Composite magnetic group

Info

Publication number: CN215600179U
Application number: CN202121356604.1U
Authority: CN
Inventors: 王家铠
Original assignee: Lanto Electronic Ltd
Current assignee: Lanto Electronic Ltd
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2022-01-21
Anticipated expiration: 2031-06-18

Abstract

The embodiment of the utility model provides a composite magnetic group which comprises a magnetizing magnetic group and a regulating magnetic group, wherein the magnetizing magnetic group is formed by sequentially arranging a second magnetizing ring and a fourth magnetizing ring from inside to outside, the regulating magnetic group is formed by a first magnetizing ring arranged on the inner side of the second magnetizing ring, a third magnetizing ring arranged between the second magnetizing ring and the fourth magnetizing ring and a fifth magnetizing ring arranged on the outer side of the fourth magnetizing ring in a surrounding manner, and the polarity arrangement of the first magnetizing ring and the fifth magnetizing ring is opposite to that of the third magnetizing ring. The magnetic induction lines formed by the magnetizing magnetic groups are adjusted by the adjusting magnetic groups to form smooth U-shaped magnetic induction lines, so that the magnetized bonded magnets can form smooth U-shaped magnetic pole arrangement.

Description

Composite magnetic group

Technical Field

The utility model relates to the technical field of magnet manufacturing, in particular to a composite magnetic group.

Background

The magnet can be manufactured by a die-casting sintering method, and the magnetic pole direction of the neodymium iron boron magnet can be controlled by applying an external magnetic field to the bonded magnet. At present, the magnetic pole direction of the bonding type magnet is single when the bonding type magnet is manufactured, and a magnetic induction line formed by a magnetizing magnetic group cannot meet the requirement.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to provide a composite magnetic assembly capable of forming a smooth U-shaped magnetic induction line.

The embodiment of the utility model provides a composite magnetic assembly, which comprises:

the magnetizing magnetic group comprises a second magnetizing ring and a fourth magnetizing ring which are sequentially arranged from inside to outside, and the magnetizing magnetic group is configured to arrange magnetic poles of a product to be magnetized; and

the adjusting magnetic group comprises a first magnetizing ring arranged on the inner side of the second magnetizing ring, a third magnetizing ring arranged between the second magnetizing ring and the fourth magnetizing ring and a fifth magnetizing ring arranged on the outer side of the fourth magnetizing ring in a surrounding mode, and the adjusting magnetic group is configured to adjust an external magnetic field formed by the magnetizing magnetic group to present a smooth U-shaped magnetic induction line.

Further, the first magnetizing ring is provided with a plurality of first magnets which are arranged along the circumferential direction;

the second magnetizing ring is arranged outside the first magnetizing ring in a surrounding mode and is provided with a plurality of second magnets which are arranged along the circumferential direction;

the third magnetizing ring is arranged outside the second magnetizing ring in a surrounding mode and is provided with a plurality of third magnets arranged along the circumferential direction;

the fourth magnetizing ring is arranged outside the third magnetizing ring in a surrounding mode and is provided with a plurality of fourth magnets arranged along the circumferential direction; and

the fifth magnetizing ring is arranged outside the fourth magnetizing ring in a surrounding mode and is provided with a plurality of fifth magnets which are arranged along the circumferential direction.

Further, the third magnet comprises an inner layer III and an outer layer III which are integrally formed, and the inner layer III of the third magnet is set to be a first magnetic pole;

the outer layer three of the third magnet is arranged to be the second magnetic pole;

the first magnetic pole and the second magnetic pole are respectively an N pole and an S pole, or respectively an S pole and an N pole.

Further, the first magnet comprises an inner layer I and an outer layer I which are integrally formed, the inner layer I of the first magnet is set to have the same polarity as the second magnetic pole, and the outer layer I of the first magnet is set to have the first magnetic pole;

the fifth magnet comprises an inner layer five and an outer layer five which are integrally formed, the inner layer five of the fifth magnet is set to have the same polarity as the second magnetic pole, and the outer layer five of the fifth magnet is set to have the same polarity as the first magnetic pole.

Further, the thickness of the inner layer I and the outer layer I of the first magnet are the same;

the thickness of the inner layer five of the fifth magnet is the same as that of the outer layer five;

the first magnet and the fifth magnet have the same thickness and the same magnetic strength.

Further, the thickness of the inner layer III of the third magnet is the same as that of the outer layer III of the third magnet.

Further, the second magnet comprises an upper layer two and a lower layer two which are integrally formed, the upper layer two of the second magnet is set to have the same polarity as the second magnetic pole, and the lower layer two of the second magnet is set to have the same polarity as the first magnetic pole;

the fourth magnet comprises an upper layer four and a lower layer four which are integrally formed, the upper layer four of the fourth magnet is set to have the same polarity as the first magnetic pole, and the lower layer four of the fourth magnet is set to have the same polarity as the second magnetic pole.

Furthermore, the axial heights of the upper layer two and the lower layer two of the second magnet are the same;

the four axial heights of the upper layer four and the lower layer of the fourth magnet are the same;

the second magnet and the fourth magnet have the same thickness and the same magnetic strength.

Further, the composite magnetic assembly further comprises:

and the resin adhesive is filled in a gap formed by the first magnet, the second magnet, the third magnet, the fourth magnet and the fifth magnet.

Furthermore, the first magnetizing ring, the second magnetizing ring, the third magnetizing ring, the fourth magnetizing ring and the fifth magnetizing ring are distributed in concentric circles from inside to outside.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

fig. 1 is a schematic perspective view of a composite magnetic assembly according to an embodiment of the present invention;

FIG. 2 is a schematic top view of a composite magnetic assembly according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a portion of a composite magnetic assembly according to an embodiment of the present invention;

FIG. 4 is a schematic view of a magnetic induction line formed by a magnetizing group cooperating with a third magnetizing coil in the related art;

fig. 5 is a schematic diagram of a magnetic induction line formed by a composite magnetic assembly according to an embodiment of the present invention.

Description of reference numerals:

1-a first magnetizing coil; 11-a first magnet; 111-inner layer one; 112-outer layer one; 2-a second magnetizing coil; 21-a second magnet; 211-upper layer two; 212-lower layer two; 3-a third magnetizing ring; 31-a third magnet; 311-inner layer three; 312-outer layer three; 4-a fourth magnetizing coil; 41-a fourth magnet; 411-upper level four; 412-lower level four; 5-a fifth magnetizing ring; 51-a fifth magnet; 511-inner layer five; 512-outer five; a-section; b-products.

Detailed Description

The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.

Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

Unless the context clearly requires otherwise, throughout the description, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".

In the description of the present invention, it is to be understood that 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. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Fig. 1 to 3 are schematic diagrams of a composite magnetic assembly according to an embodiment of the present invention, and as shown in fig. 1 to 3, the composite magnetic assembly according to the embodiment includes a magnetizing magnetic assembly and a regulating magnetic assembly. The magnetizing magnetic group comprises a second magnetizing ring 2 and a fourth magnetizing ring 4 which are arranged inside and outside in sequence, the adjusting magnetic group comprises a first magnetizing ring 1 arranged on the inner side of the second magnetizing ring 2, a third magnetizing ring 3 arranged between the second magnetizing ring 2 and the fourth magnetizing ring 4 and a fifth magnetizing ring 5 arranged on the outer side of the fourth magnetizing ring 4 in a surrounding mode, and the polarity arrangement of the first magnetizing ring 1 and the polarity arrangement of the fifth magnetizing ring 5 are opposite to that of the third magnetizing ring 3. As shown in fig. 4, the U-shaped external magnetic field formed by the magnetizing group cooperating with the single third magnetizing coil 3 can perform magnetic pole arrangement, i.e. magnetizing, on the product B to be magnetized. And the magnetizing magnetic group is matched with a magnetic induction line formed by the single third magnetizing coil 3 to be in a transverse expansion state, and the first magnetizing coil 1 and the fifth magnetizing coil 5 are arranged in a polarity opposite to that of the third magnetizing coil 3 to realize transverse contraction of the magnetic induction line. As shown in fig. 5, the adjusting magnet assembly is used for adjusting an external magnetic field formed by the magnetizing magnet assembly, so that a smooth U-shaped magnetic induction line can be presented, and a magnetized product B forms a smooth U-shaped magnetic pole arrangement.

The first magnetizing coil 1 has a plurality of first magnets 11 arranged in the circumferential direction. That is, the first magnets 11 of the present embodiment are arranged in a circular array in a ring shape. Note that the first magnet 11 of the present embodiment is provided in an elongated shape, and the cross section is provided in a fan ring shape. Thereby, the plurality of first magnets 11 are vertically placed and aligned into the annular first magnetizing coil 1.

Further, the second magnetizing coil 2 of the present embodiment is disposed around the outside of the first magnetizing coil 1, and has a plurality of second magnets 21 arranged in the circumferential direction. Similarly, the second magnet 21 of the present embodiment is a bar-like structure having a sector ring-shaped cross section. Thereby, the plurality of second magnets 21 are arranged in a ring having a size larger than that of the first magnetizing coil 1. That is to say, the second magnetizing coil 2 is sleeved outside the first magnetizing coil 1.

Similarly, the third magnetizing coil 3 is arranged around the second magnetizing coil 2, the fourth magnetizing coil 4 is arranged around the third magnetizing coil 3, and the fifth magnetizing coil 5 is arranged around the fourth magnetizing coil 4. Specifically, the third magnetizing coil 3 has a plurality of third magnets 31 arranged in the circumferential direction, the fourth magnetizing coil 4 has a plurality of fourth magnets 41 arranged in the circumferential direction, and the fifth magnetizing coil 5 has a plurality of fifth magnets 51 arranged in the circumferential direction. That is, the third magnet 31, the fourth magnet 41, and the fifth magnet 51 have a strip-like structure having a sector ring-shaped cross section, and are arranged in a ring-shaped third magnetizing coil 3, a ring-shaped fourth magnetizing coil 4, and a ring-shaped fifth magnetizing coil 5, respectively. The size of the third magnetizing coil 3 is larger than that of the second magnetizing coil 2, the size of the fourth magnetizing coil 4 is larger than that of the third magnetizing coil 3, and the size of the fifth magnetizing coil 5 is larger than that of the fourth magnetizing coil 4. That is to say, the third magnetizing coil 3 is sleeved outside the second magnetizing coil 2, the fourth magnetizing coil 4 is sleeved outside the third magnetizing coil 3, and the fifth magnetizing coil 5 is sleeved outside the fourth magnetizing coil 4. Therefore, the composite magnetic assembly of the present embodiment includes a multiple circular ring type magnet array formed by a plurality of magnetizing rings.

It should be noted that, in the present embodiment, the first magnetizing coil 1, the second magnetizing coil 2, the third magnetizing coil 3, the fourth magnetizing coil 4, and the fifth magnetizing coil 5 are distributed from inside to outside in concentric circles, as shown in fig. 2. It should also be understood that, as an alternative embodiment, the axial heights of the first magnet 1, the second magnet 2, the third magnet 3, the fourth magnet 4 and the fifth magnet 5 are the same. Therefore, as shown in fig. 3, the cross section of the magnet array configured in this embodiment is the same rectangle at any position, so as to magnetize the product B to be magnetized, which is placed below the third magnetizing coil 3.

Further, in the present embodiment, third magnet 31 includes inner layer three 311 and outer layer three 312 that are integrally formed, inner layer three 311 of third magnet 31 is provided as a first magnetic pole, and outer layer three 312 of third magnet 31 is provided as a second magnetic pole opposite to the first magnetic pole. In the present embodiment, the first magnetic pole is an N pole, and the second magnetic pole is an S pole. That is, the inner ring of the third magnetizing coil 3 of the present embodiment is an N pole, and the outer ring is an S pole.

Further, in the present embodiment, the second magnet 21 includes an upper layer two 211 and a lower layer two 212 which are integrally formed, the upper layer two 211 of the second magnet 21 is set to have the same polarity as the second magnetic pole, and the lower layer two 212 is set to have the same polarity as the first magnetic pole. That is, the upper turn of the second magnetizing coil 2 of the present embodiment is an S pole, and the lower turn is an N pole. Correspondingly, the fourth magnet 41 includes an upper layer four 411 and a lower layer four 412 which are integrally formed, the upper layer four 411 of the fourth magnet 41 is set to have the same polarity as the first magnetic pole, and the lower layer four 412 is set to have the same polarity as the second magnetic pole. That is, the upper turn of the fourth magnetizing coil 4 of the present embodiment is an N pole, and the lower turn is an S pole. Thus, the magnetic induction lines in a U shape can be formed by the cooperation of the second magnetizing coil 2, the third magnetizing coil 3 and the fourth magnetizing coil 4, and the magnetized bonded magnets can be arranged in a U-shaped magnetic pole array.

In the present embodiment, the thickness of the inner layer three 311 and the thickness of the outer layer three 312 of the third magnet 31 are the same, that is, the cross section of the third magnetizing coil 3 has a symmetric magnetic pole structure. It is easy to understand that the thickness refers to the dimension of each magnet along the radius direction on the circular plane formed by the composite magnetic assembly. Further, the second magnet 21 of the present embodiment has the same axial height of the second upper layer 211 as that of the second lower layer 212, the fourth magnet 41 has the same axial height of the fourth upper layer 411 as that of the fourth lower layer 412, and the magnetic strength and thickness of the second magnet 21 and the fourth magnet 41 are the same. Therefore, the sections of the second magnetizing ring 2, the third magnetizing ring 3 and the fourth magnetizing ring 4 form a symmetrical structure, so that the formed U-shaped magnetic induction lines are symmetrical, and the magnetized bonded magnet magnetic poles are arranged more symmetrically.

Further, in the present embodiment, the first magnet 11 includes an inner layer one 111 and an outer layer one 112 that are integrally formed, the inner layer one 111 of the first magnet 11 is set to have the same polarity as the second magnetic pole, and the outer layer one 112 is set to have the same polarity as the first magnetic pole. Correspondingly, the fifth magnet 51 includes an inner layer five 511 and an outer layer five 512 which are integrally formed, the inner layer five 511 of the fifth magnet 51 is set to have the same polarity as the second magnetic pole, and the outer layer five 512 is set to have the same polarity as the first magnetic pole. That is, the inner ring of the first magnetizing coil 1 and the fifth magnetizing coil 5 is S-pole, and the outer ring is N-pole. Therefore, the first magnetizing ring 1 and the fifth magnetizing ring 5 can adjust the magnetic field formed by the second magnetizing ring 2, the third magnetizing ring 3 and the fourth magnetizing ring 4, so that the formed U-shaped magnetic induction line is smoother, namely the arrangement of the U-shaped magnetic poles of the magnetized bonded magnet is smoother.

Note that, in the present embodiment, the inner layer one 111 and the outer layer one 112 of the first magnet 11 have the same thickness, the inner layer five 511 and the outer layer five 512 of the fifth magnet 51 have the same thickness, and the magnetic strength and the thickness of the first magnet 11 and the fifth magnet 51 are the same. That is, the cross-sections of the first magnetizing coil 1 and the fifth magnetizing coil 5 constitute a symmetrical structure. Therefore, the first magnetizing coil 1 and the fifth magnetizing coil 5 can symmetrically adjust the magnetic field formed by the second magnetizing coil 2, the third magnetizing coil 3 and the fourth magnetizing coil 4. That is, as shown in fig. 3, the symmetrical structure of the cross-section of the first magnetizing coil 1, the second magnetizing coil 2, the third magnetizing coil 3, the fourth magnetizing coil 4, and the fifth magnetizing coil 5 of the present embodiment can make the formed magnetic induction lines have a symmetrical and smoother U-shape, and the magnetic poles of the magnetized bonded magnet can be arranged in a symmetrical and smoother U-shape.

It should be understood that, because magnets have the property of repelling like poles, and the magnetic field is disturbed if the magnets are forced to adhere to each other, a certain gap is left between each magnet in the present embodiment, as shown in fig. 1-3. It should be noted that, on the premise of ensuring the stability of the magnetizing effect, the smaller the gap between the magnets is, the better. It should be further noted that, in order to ensure the symmetry of the magnetic pole arrangement, the thickness of the gap between the first magnetizing coil 1 and the second magnetizing coil 2 is the same as the thickness of the gap between the third magnetizing coil 3 and the fourth magnetizing coil 4, and the thickness of the gap between the second magnetizing coil 2 and the third magnetizing coil 3 is the same as the thickness of the gap between the third magnetizing coil 3 and the fourth magnetizing coil 4. It should be understood that the size of the gap between the magnetizing rings can be adjusted according to the structure of the product B to be magnetized, that is, the magnetic pole arrangement can be adjusted by adjusting the size of the gap.

In this embodiment, the composite magnetic assembly further includes a resin adhesive. The resin paste is filled in the gaps formed by the first magnet 11, the second magnet 21, the third magnet 31, the fourth magnet 41 and the fifth magnet 51, so that the first magnetizing coil 1, the second magnetizing coil 2, the third magnetizing coil 3, the first magnetizing coil 4 and the fifth magnetizing coil 5 are fixed as a whole.

Further, the composite magnetic assembly of the present embodiment further includes a housing, and the first magnetizing coil 1, the second magnetizing coil 2, the third magnetizing coil 3, the first magnetizing coil 4, and the fifth magnetizing coil 5 are disposed in the housing. It should be understood that the housing of the present embodiment is made of a material with low thermal conductivity and magnetic permeability, such as non-magnetic steel.

In the present embodiment, the number of the second magnets 21 and the number of the fourth magnets 41 are four, the number of the first magnets 11, the number of the third magnets 31, and the number of the fifth magnets 51 are twenty, and each third magnet 31 corresponds to one first magnet 11 and one fifth magnet 51, and each fifth third magnet 31 corresponds to one second magnet 21 and one fourth magnet 41. It is understood that the larger the number of each type of magnet, the better the magnetic pole arrangement of the bonded type magnet to be magnetized, while ensuring the stability of the magnetizing effect. However, the more the number of magnets, the higher the cost of manufacturing the mold. Therefore, the present embodiment preferably selects a suitable number of magnets in consideration of the stability of the magnetizing effect and the manufacturing cost.

Further, the thickness of the third magnetizing ring 3 of the present embodiment can be adjusted according to the width of the product B to be magnetized, so as to ensure that the product B forms a U-shaped magnetic pole arrangement. Furthermore, as an optional implementation manner, the first magnet 11, the second magnet 21, the third magnet 31, the fourth magnet 41, and the fifth magnet 51 of the present embodiment are neodymium-iron-boron magnets, which have extremely high magnetic performance, good machining performance, and high cost performance.

It should be understood that the first magnetic pole of the present embodiment is an N pole, and the second magnetic pole is an S pole. As an alternative embodiment, the first magnetic pole may be set to the S pole, and the second magnetic pole may be set to the N pole, so that the magnetic pole direction of the magnetized bonded magnet may be changed.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite magnetic assembly, comprising:

the magnetizing magnetic group comprises a second magnetizing ring (2) and a fourth magnetizing ring (4) which are sequentially arranged from inside to outside, and the magnetizing magnetic group is configured to arrange magnetic poles of a product (B) to be magnetized; and

the adjusting magnetic group comprises a first magnetizing coil (1) arranged on the inner side of the second magnetizing coil (2), a third magnetizing coil (3) arranged between the second magnetizing coil (2) and the fourth magnetizing coil (4), and a fifth magnetizing coil (5) arranged on the outer side of the fourth magnetizing coil (4) in a surrounding mode, the polarity arrangement of the first magnetizing coil (1) and the polarity arrangement of the fifth magnetizing coil (5) are opposite to that of the third magnetizing coil (3), and the adjusting magnetic group is configured to adjust an external magnetic field formed by the magnetizing magnetic group to present a smooth U-shaped magnetic induction line.

2. A composite magnetic assembly according to claim 1, characterized in that said first magnetizing coil (1) has a plurality of first magnets (11) arranged circumferentially;

the second magnetizing ring (2) is arranged around the outer side of the first magnetizing ring (1) and is provided with a plurality of second magnets (21) arranged along the circumferential direction;

the third magnetizing ring (3) is arranged outside the second magnetizing ring (2) in a surrounding mode and is provided with a plurality of third magnets (31) arranged along the circumferential direction;

the fourth magnetizing ring (4) is arranged at the outer side of the third magnetizing ring (3) in a surrounding mode and is provided with a plurality of fourth magnets (41) arranged along the circumferential direction; and

the fifth magnetizing ring (5) is arranged around the outer side of the fourth magnetizing ring (4) and is provided with a plurality of fifth magnets (51) which are arranged along the circumferential direction.

3. A composite magnetic group according to claim 2, characterized in that said third magnet (31) comprises an inner layer three (311) and an outer layer three (312) which are integrally formed, the inner layer three (311) of said third magnet (31) being arranged as a first magnetic pole;

the outer layer three (312) of the third magnet (31) is set as a second magnetic pole;

4. A composite magnetic group according to claim 3, wherein the first magnet (11) comprises an inner layer one (111) and an outer layer one (112) which are integrally formed, the inner layer one (111) of the first magnet (11) being arranged with the same polarity as the second magnetic pole, and the outer layer one (112) of the first magnet (11) being arranged with the same polarity as the first magnetic pole;

the fifth magnet (51) includes an inner layer five (511) and an outer layer five (512) which are integrally formed, the inner layer five (511) of the fifth magnet (51) is set to have the same polarity as the second magnetic pole, and the outer layer five (512) of the fifth magnet (51) is set to have the same polarity as the first magnetic pole.

5. Composite magnetic group according to claim 4, characterized in that the first magnet (11) has an inner layer one (111) and an outer layer one (112) of the same thickness;

the thickness of the inner layer five (511) and the outer layer five (512) of the fifth magnet (51) is the same;

the first magnet (11) and the fifth magnet (51) have the same thickness and the same magnetic strength.

6. A composite magnetic assembly according to claim 3, characterized in that the third magnet (31) has an inner layer three (311) of the same thickness as an outer layer three (312).

7. A composite magnetic group according to claim 3, wherein the second magnet (21) comprises an upper layer two (211) and a lower layer two (212) which are integrally formed, the upper layer two (211) of the second magnet (21) being arranged to have the same polarity as the second magnetic pole, and the lower layer two (212) of the second magnet (21) being arranged to have the same polarity as the first magnetic pole;

the fourth magnet (41) includes an upper layer four (411) and a lower layer four (412) which are integrally formed, the upper layer four (411) of the fourth magnet (41) is set to have the same polarity as the first magnetic pole, and the lower layer four (412) of the fourth magnet (41) is set to have the same polarity as the second magnetic pole.

8. The composite magnetic assembly of claim 7, wherein the upper second (211) and the lower second (212) of the second magnet (21) have the same axial height;

the axial heights of the upper layer four (411) and the lower layer four (412) of the fourth magnet (41) are the same;

the second magnet (21) and the fourth magnet (41) have the same thickness and the same magnetic strength.

9. The composite magnetic assembly of claim 2, further comprising:

and a resin paste filled in gaps formed by the first magnet (11), the second magnet (21), the third magnet (31), the fourth magnet (41) and the fifth magnet (51).

10. A composite magnetic assembly according to claim 1, wherein the first magnetizing coil (1), the second magnetizing coil (2), the third magnetizing coil (3), the fourth magnetizing coil (4) and the fifth magnetizing coil (5) are concentrically arranged from the inside to the outside.