CN219225993U

CN219225993U - Magnetizing device for permanent magnet and permanent magnet

Info

Publication number: CN219225993U
Application number: CN202223163914.9U
Authority: CN
Inventors: 王华成; 周寿林; 何金洲
Original assignee: Chengdu Galaxy Magnets Co Ltd
Current assignee: Chengdu Galaxy Magnets Co Ltd
Priority date: 2022-11-28
Filing date: 2022-11-28
Publication date: 2023-06-20
Anticipated expiration: 2032-11-28

Abstract

The utility model relates to the technical field of motors, in particular to a magnetizing device for a magnet and a permanent magnet. The magnetizing device comprises a framework and a coil; the inner circle or the outer circle of the framework is used for placing a permanent magnet to be magnetized; the wire bags are arranged inside the framework; the framework part between the coil and the permanent magnet is called a partition part; the contact surfaces of the unbroken partition parts and the permanent magnets are continuous and smooth transition surfaces. The contact surface of the magnet and the framework is a continuous smooth surface by arranging the unbroken partition part; meanwhile, the unbroken partition parts reduce the probability of deformation of the framework during high-voltage magnetizing and reduce the scratch on the surface of the product caused by deformation or fracture of the framework.

Description

Magnetizing device for permanent magnet and permanent magnet

Technical Field

The utility model relates to the technical field of motors, in particular to a magnetizing device for a magnet and a permanent magnet.

Background

When the permanent magnet is magnetized, magnetizing devices with different designs or different structures have different magnetizing effects on the same product. The permanent magnetic product has strong magnetism, so that the magnetized product and the magnetizing device have larger attraction force, and the surface of the magnet is particularly easy to scratch or even damage.

In order to reduce the probability of scratching, the magnetizing device is designed as shown in fig. 1-3, the middle part of the framework 2 is provided with a first space 21 for placing a magnet to be magnetized, and a plurality of spaces 22 for placing the wire bags 1 are arranged inside the framework 2; the first space 21 and the second space 22 are provided with communicated notches 23 so as to reduce the influence on the magnetic circuit; and a large gap (> 0.1 mm) is left between the magnet and the frame 2 when the magnet is in the first space 21. In order to ensure that the magnetic field intensity of the space where the permanent magnet is positioned is the same at the moment of magnetizing, the magnetizing device is required to provide higher magnetizing energy due to larger gaps, and the magnetizing machine saturates the permanent magnet by outputting higher magnetizing voltage.

However, when the magnetizing device with the structure is used for magnetizing under high voltage and meeting the magnetizing saturation requirement, the coil is easy to deform due to the existence of the notch on the framework, and the epoxy resin for fixing the coil at the notch is easy to crack, so that the surface of the magnetized product is scratched.

The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art

Disclosure of Invention

The utility model aims at: the utility model provides a be used for the permanent magnet magnetize device to the problem that the skeleton breach leads to the surface fish tail of the product that magnetizes easily when having to magnetize to the permanent magnet to prior art, this magnetize device cuts off first space and second space for the contact surface of second space and permanent magnet is smooth face in succession, has cancelled the breach between first space and the second space, thereby avoids the product surface fish tail that the skeleton warp and epoxy burst and lead to when high voltage magnetizes.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

a magnetizing device for permanent magnet comprises a framework and a coil

The framework is provided with a first space for placing a permanent magnet to be magnetized; a plurality of second spaces are arranged in the circumferential direction of the first space, and the coil is arranged in each second space; a partition part is arranged between the first space and the second space; the contact surfaces of the framework and the permanent magnets can be continuous and smooth transition surfaces by the partition parts.

Through first space and second space partition, there is not the intercommunication breach between first space and the second space for the contact surface of skeleton and magnet is continuous smooth surface, and partition portion between first space and the second space is even as an organic wholely simultaneously, has reduced the probability that the skeleton warp when high voltage magnetizes, has reduced the product surface fish tail that the skeleton warp or epoxy fracture caused.

As a preferable scheme of the utility model, the framework is of a cylindrical structure; the cylindrical space in the middle of the cylindrical structure is the first space; the second spaces are located in the annular column and close to one side of the interior, so that the second spaces are located at the periphery of the first space. When the permanent magnet is cylindrical or circular, the first space is a cylindrical space and is matched with the outer surface of the permanent magnet when the outer surface of the permanent magnet is magnetized.

As a preferable mode of the utility model, the framework is of a cylindrical structure, and the first space is arranged on the periphery of the cylinder; the second spaces are located in the cylinder and near one side of the outer circumference such that the second spaces are located inside the first space. When the permanent magnet is in a ring shape, the first space is an annular space and is matched with the inner surface of the permanent magnet when the inner surface of the permanent magnet is magnetized.

As a preferred embodiment of the present utility model, the plurality of second spaces are uniformly distributed along the circumferential direction of the first space.

As a preferable scheme of the utility model, the framework is an integrally formed framework.

As a preferable mode of the utility model, the thickness of the partition part is 0.7-2mm. Further preferably 0.7 to 1.5mm. When the partition part is too thick, a higher magnetizing voltage is required; when the partition portion is too thin, the strength is poor. When the range is within the range, the strength of the framework can be maintained, and the use of too high magnetizing voltage is avoided, so that the vibration and heating can be reduced.

As a preferable scheme of the utility model, when the permanent magnet is arranged in the first space, the gap between the permanent magnet and the framework is 0.05-0.1mm. As the contact surface of the framework and the permanent magnet is a continuous surface, the scratch of the product is effectively reduced, and the gap between the permanent magnet and the framework can be further reduced. After the gap is reduced, magnetizing voltage can be reduced to a certain extent, vibration and heating caused by high voltage are further reduced, and scratch caused by skeleton deformation is reduced; meanwhile, the service life of the magnetizing device is prolonged by reducing the magnetizing voltage.

As a preferred embodiment of the utility model, the wire diameter of the wire package is greater than 1.0mm. The temperature resistance grade of the wire is 180 ℃ or above.

A permanent magnet obtained by magnetizing with the magnetizing apparatus for a permanent magnet as described above. The permanent magnet obtained by magnetizing by the magnetizing device is not easy to scratch on the surface of a product, and the product quality is better.

As a preferable mode of the utility model, the permanent magnet is a ring-shaped permanent magnet.

A motor rotor comprising a rotating shaft, a support member and an annular permanent magnet as described above; the annular permanent magnet is sleeved on the rotating shaft, and the supporting piece is positioned between the annular permanent magnet and the rotating shaft. The annular permanent magnet obtained by using the magnetizing device has more stable quality, avoids surface scratch and even scraps, and is beneficial to the assembly of the rotor and the stability of the quality of the rotor.

In summary, due to the adoption of the technical scheme, the beneficial effects of the utility model are as follows:

1. according to the magnetizing device for the permanent magnet, the first space and the second space are independently arranged, and a communication gap is not formed between the first space and the second space, so that the contact surface of the framework and the magnet is a continuous smooth surface, and the first space is a cylindrical space or an annular space and is matched with the outer surface and the inner surface of the annular permanent magnet. Meanwhile, the partition parts between the first space and the second space are connected into a whole, so that the probability of deformation of the framework during high-voltage magnetizing is reduced, and the surface scratch of a product caused by deformation or fracture of the framework is reduced.

2. According to the magnetizing device for the permanent magnet, the partition part is arranged between the first space and the second space, and the first space and the second space are independent spaces. The gap is formed between the permanent magnet and the framework, so that magnetizing voltage can be reduced to a certain extent after the gap is reduced, vibration and heating caused by high voltage are further reduced, and scratch caused by framework deformation is reduced; meanwhile, the service life of the magnetizing device is prolonged by reducing the magnetizing voltage.

3. According to the annular permanent magnet, the annular permanent magnet obtained by using the magnetizing device is unlikely to scratch on the surface of a product, the product quality is better, the surface scratch and even the generation of scraps are avoided, and the assembly of a rotor and the stability of the quality of the rotor are facilitated.

Drawings

Fig. 1 is a schematic structural view of a magnetizing apparatus in the prior art.

Fig. 2 is a schematic cross-sectional view of fig. 1 at A-A.

Fig. 3 is an enlarged pictorial view of fig. 1 at circle 0.

Fig. 4 is a schematic structural diagram of the magnetizing apparatus in embodiment 1.

Fig. 5 is a cross-sectional illustration at B-B of fig. 4.

Fig. 6 is an enlarged schematic diagram of fig. 4 at circle P.

Fig. 7 is a schematic diagram showing the relationship between the magnetizing apparatus and the ring permanent magnet in example 1.

Fig. 8 is an enlarged schematic diagram of fig. 7 at a circle S.

Fig. 9 is a schematic structural diagram of a magnetizing apparatus in embodiment 2.

Fig. 10 is a cross-sectional illustration at C-C of fig. 9.

Fig. 11 is an enlarged schematic illustration of fig. 9 at circle Q.

Icon: 1-a coil; 2-skeletons; 21-a first space; 22-a second space; 23-notch; 24-partition; 3-permanent magnet.

Detailed Description

The present utility model will be described in detail with reference to the accompanying drawings.

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Example 1

A magnetizing apparatus for a permanent magnet, as shown in fig. 4, 5 and 6, includes a bobbin 2 and a coil 1;

the skeleton 2 has a first space 21 for placing a permanent magnet to be magnetized; a plurality of second spaces 22 are circumferentially arranged in the first space 21, and the coil 1 is arranged in each second space 22; a partition 24 is provided between the first space 21 and the second space 22; the partitions 24 can make the contact surface of the skeleton 2 and the permanent magnet be a continuous smooth transition surface. Through independent setting in first space 21 and second space 22, there is not intercommunication breach 23 between first space 21 and the second space 22 for the contact surface of skeleton 2 and permanent magnet is continuous smooth surface, and partition portion 24 between first space 21 and the second space 22 is as an organic whole simultaneously, has reduced the probability that skeleton 2 warp when high voltage magnetizes, has reduced the product surface fish tail that the skeleton 2 warp or fracture caused.

The framework 2 is of a circular cylindrical structure; fig. 4 is a schematic cross-sectional view thereof. The cylindrical space in the middle of the circular column is the first space 21; a plurality of the second spaces 22 are located in the circular column near one side of the inside such that the plurality of the second spaces 22 are located at the outer circumference of the first space 21. When the permanent magnet is cylindrical or circular, the first space 21 is a cylindrical space and matches with the outer surface of the permanent magnet when magnetizing the outer surface of the permanent magnet.

The second spaces are uniformly distributed along the circumferential direction of the first space. In this embodiment, the number of the second spaces 22 is 4. The framework 2 is an integrally formed framework. The wire diameter of the wire used for the coil is 1.9mm. The temperature resistance rating of the wire was 220 ℃.

As shown in fig. 6, the thickness d of the partition 24 is 0.7-2mm. Further preferably 0.7 to 1.5mm. When the partition part is too thick, a higher magnetizing voltage is required; when the partition portion is too thin, the strength is poor. When the range is within the range, the strength of the framework can be maintained, and the use of too high magnetizing voltage is avoided, so that the vibration and heating can be reduced.

When the permanent magnet 3 is placed in the first space 21, as shown in fig. 7 and 8, a gap r between the permanent magnet 3 and the frame 2 is 0.05-0.1mm. Because the contact surface of the framework 2 and the permanent magnet 3 is a continuous surface, the scratch of the product is effectively reduced, and the gap r between the permanent magnet and the framework can be further reduced. After the gap r is reduced, magnetizing voltage can be reduced to a certain extent, vibration and heating caused by high voltage are further reduced, and scratch caused by skeleton deformation is reduced; meanwhile, the service life of the magnetizing device is prolonged by reducing the magnetizing voltage.

Example 2

In this embodiment, as shown in fig. 9, 10 and 11, the skeleton 2 has a cylindrical structure, and the first space is formed on the periphery of the cylindrical structure; a number of the second spaces 22 are located in the cylinder at a side close to the outer circumference such that the number of the second spaces 22 are located inside the first space. When the permanent magnet is in a ring shape, the first space is an annular space and is matched with the inner surface of the permanent magnet when the inner surface of the permanent magnet is magnetized. A plurality of the second spaces 22 are uniformly distributed along the circumference of the first space. As shown in fig. 11, the thickness d of the partition portion 24 is 1-2mm.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. A magnetizing device for permanent magnets, characterized by comprising a skeleton (2) and a coil (1);

the framework (2) is provided with a first space (21) for placing a permanent magnet to be magnetized;

the coil (1) is arranged inside the framework (2);

a partition part (24) is arranged between the first space (21) and the coil (1);

the contact surfaces of the framework (2) and the permanent magnets can be continuous and smooth transition surfaces by the partition parts (24).

2. Magnetizing apparatus for permanent magnets according to claim 1, characterized in that the skeleton (2) is of cylindrical structure; the cylindrical space in the middle of the cylindrical structure is the first space (21); a plurality of second spaces (22) are positioned in the annular column and near one side of the interior.

3. Magnetizing apparatus for permanent magnets according to claim 1, characterized in that the skeleton (2) is of cylindrical structure, the cylindrical periphery being the first space (21); a plurality of second spaces (22) are located in the cylinder at a side near the outer periphery.

4. Magnetizing apparatus for permanent magnets according to claim 1, characterized in that several second spaces (22) are evenly distributed along the circumference of the first space (21).

5. Magnetizing apparatus for permanent magnets according to any of the claims 1-4, characterized in that the thickness of the partition (24) is 0.7-2mm.

6. Magnetizing apparatus for permanent magnets according to any of the claims 1-4, characterized in that the gap between the permanent magnet (3) and the armature (2) is 0.05-0.1mm when the permanent magnet (3) is placed in the first space (21).

7. Magnetizing apparatus for permanent magnets according to any of the claims 1-4, characterized in that the wire package (1) uses a wire diameter of more than 1.0mm.

8. A permanent magnet, characterized in that it is obtained by magnetizing with a magnetizing apparatus for permanent magnets according to any one of claims 1-7.

9. The permanent magnet according to claim 8, wherein the permanent magnet is a ring-shaped permanent magnet.