Motor rotor and motor

Abstract

The utility model relates to a motor rotor and a motor. The motor rotor comprises a rotor main body with an annular edge part; the plurality of magnetic steels are arranged on the rotor main body and are distributed at intervals along the annular edge part of the rotor main body; the rotor comprises a rotor body and an annular magnetizer, the magnetizer is provided with a turnup structure extending out of the magnetizer from the outer side and / or the inner side of the magnetizer in the circumferential direction of the magnetizer, the magnetizer and the rotor body are subjected to injection molding, and at least part of the turnup structure is wrapped in the rotor body. According to the motor rotor, the turnup structure is arranged on the magnetizer, so that the strength of the magnetizer is improved, the magnetizer and the rotor main body can be ensured to have a good matching effect, the magnetizer is prevented from being deformed, and the forming quality of the motor rotor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and further to a motor rotor and a motor, and in particular to a direct-drive motor rotor and a motor with a flanged steel ring. Background Art

[0002] With the continuous development of motor technology, the requirements for motors and motor components in terms of performance and strength are becoming higher and higher. For example, in order to ensure the strength and magnetism of the motor rotor, a steel ring is arranged on the circumference of the existing motor rotor. During the manufacturing process, the steel ring is formed by winding the steel strip into a ring and then welding the ends. The main disadvantages are:

[0003] 1. The processing technology of steel ring is complicated, the scrap rate is high, and the cost is high;

[0004] Second, the roundness of the steel ring cannot be guaranteed after forming, and its own strength is poor, and the adaptation effect with the rotor body is not good;

[0005] 3. After the steel ring is formed, it needs to be injection molded with the rotor body. In order to ensure the stability of the connection between the steel ring and the rotor body, the rotor body needs to wrap the steel ring as a whole. Not only is the process complicated, but it also increases material loss, resulting in an increase in production costs.

[0006] Therefore, the inventor, relying on many years of experience and practice in related industries, proposes a motor rotor and a motor to solve at least one of the above technical problems. Utility Model Content

[0007] The purpose of the utility model is to provide a motor rotor and a motor, in which a flange structure is added to the magnetizer. The magnetizer is simple to manufacture and can ensure roundness. At the same time, the flange structure improves the strength of the magnetizer itself, ensures that it has a good adaptation effect with the rotor body, and improves the molding quality of the motor rotor.

[0008] Another object of the utility model is to provide a motor rotor and a motor. Due to the enhanced strength of the magnetizer, the magnetizer no longer needs to be completely wrapped by the rotor body for injection molding, thus saving material costs and having better economy.

[0009] The purpose of the utility model can be achieved by adopting the following scheme:

[0010] The utility model provides a motor rotor, which comprises:

[0011] a rotor body having an annular rim;

[0012] A plurality of magnetic steels are arranged on the rotor body, wherein the plurality of magnetic steels are distributed at intervals along the annular edge of the rotor body;

[0013] The magnetizer is annular and has a flange structure extending outward and / or inward from the magnetizer along its circumference. The magnetizer and the rotor body are injection molded, and at least part of the flange structure is enclosed in the rotor body.

[0014] In a preferred embodiment of the present invention, the magnetic conductor includes an annular body, and the flange structure includes an annular first flange, the first flange is located at one end of the annular body, and the first flange extends toward the axial direction close to the annular body so that the first flange can be completely covered by the rotor body.

[0015] In a preferred embodiment of the present invention, the flange structure includes a second annular flange, the second flange is located at the other end of the annular body relative to the first flange, and the second flange extends away from the axial direction of the annular body, and at least one side outer wall of the second flange can be connected to the rotor body.

[0016] In a preferred embodiment of the present invention, a plurality of first connection parts for enhancing the connection strength between the magnetizer and the rotor body are provided on the first flange and / or the second flange.

[0017] In a preferred embodiment of the present invention, the first connecting portion is a notch or a through hole provided on the first flange and / or the second flange, and when the magnetic conductor and the rotor body are injection molded, a connecting column is formed in the first connecting portion and is integrally molded with the rotor body.

[0018] In a preferred embodiment of the present invention, a plurality of the first connection portions are spaced apart along the circumference of the first flange and / or the circumference of the second flange.

[0019] In a preferred embodiment of the present invention, the edge of the rotor body has a plurality of hollow portions, the plurality of magnetic steels are located at the corresponding hollow portions, and the magnetic conductor is arranged around the outer periphery of the plurality of magnetic steels along the circumferential direction of the rotor body;

[0020] At least a portion of the annular body and / or at least a portion of the second flange is exposed outside the rotor body.

[0021] In a preferred embodiment of the present invention, the inner diameter of the first flange is smaller than the inner diameter of the annular edge of the rotor body.

[0022] In a preferred embodiment of the present invention, the magnetic conductor is a steel ring formed by welding or whole cutting, and the end position of the steel ring is punched to form the flange structure.

[0023] The utility model provides a motor, which comprises:

[0024] The above-mentioned motor rotor;

[0025] A transmission member, wherein the transmission member is arranged on the motor rotor;

[0026] A rotating shaft is connected to the motor rotor through the transmission member.

[0027] From the above, the characteristics and advantages of the motor rotor and the motor of the utility model are:

[0028] A plurality of magnetic steels and an annular magnetizer are arranged on the annular edge of the rotor body, and the magnetizer plays a magnetic conductive role. Since a flange structure is arranged on the magnetizer along its circumference, the flange structure can extend to the outside or inside of the magnetizer and protrude from the magnetizer. Of course, the flange structure can also have two parts that extend to the outside and inside of the magnetizer and protrude from the magnetizer respectively. By integrally injection molding the magnetizer and the rotor body, and at least part of the flange structure is enclosed in the rotor body, the magnetizer not only has a magnetic conductive role, but also can improve the strength of the magnetizer, ensure that the magnetizer is not easily deformed and maintains good adaptability with the rotor body, ensure that the magnetizer and the rotor body meet the preset requirements after molding, and improve the rotor molding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0030] Figure 1 : It is a three-dimensional diagram of the motor rotor of the utility model.

[0031] Figure 2 : It is a top view of the motor rotor of the utility model.

[0032] Figure 3 : It is a front cross-sectional view of the motor rotor of the utility model.

[0033] Figure 4 : It is a three-dimensional diagram of the magnetic conductor in the motor rotor of the utility model.

[0034] Figure 5 : It is a top view of the magnetic conductor in the motor rotor of the utility model.

[0035] Figure 6 : It is a front cross-sectional view of the magnetic conductor in the motor rotor of the utility model.

[0036] Figure 7 : It is a three-dimensional diagram of the rotor body in the motor rotor of the utility model.

[0037] The accompanying drawings in the present utility model are as follows:

[0038] 1. rotor body; 101. hollow part;

[0039] 102. A second connecting portion; 2. A magnetic conductor;

[0040] 201. annular body; 202. first flange;

[0041] 203, second flange; 204, first connecting portion;

[0042] 3. Magnetic steel; 4. Transmission parts. DETAILED DESCRIPTION

[0043] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings.

[0044] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be an element in the middle. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an element in the middle. The terms "upper", "lower", "top", "bottom", "inner", "outer" and similar words indicating directionality as used herein are used in conjunction with the term "upper", "lower", "top", "bottom", "inner", "outer" and similar words indicating directionality. Figure 3 The directions of “upper”, “lower”, “top”, “bottom”, “inside” and “outside” are used as the basis, which is only to explain the structure of the product more clearly and does not mean that it is the only implementation method.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0046] Implementation Method 1

[0047] like Figures 1 to 7 As shown, the utility model provides a motor rotor, which includes a rotor body 1, a magnetizer 2 and a plurality of magnets 3. The rotor body 1 is disc-shaped, and the rotor body 1 has a circular ring-shaped edge (i.e., the circular ring edge of the rotor body 1); the plurality of magnets 3 are arranged on the rotor body 1, and the plurality of magnets 3 are distributed at intervals along the annular edge of the rotor body 1; the magnetizer 2 is in a circular ring shape adapted to the rotor body 1, and the magnetizer 2 has a flange structure extending out of the magnetizer 2 toward the outer side and / or the inner side of the magnetizer 2 along the circumferential direction of the magnetizer 2, the magnetizer 2 and the rotor body 1 are injection molded, and at least part of the flange structure is enclosed in the rotor body 1.

[0048] In the utility model, a plurality of magnetic steels 3 and a ring-shaped magnetizer 2 are arranged on the annular edge of the rotor body 1, and the magnetizer 2 plays a magnetic conductive role; since a flange structure is arranged on the magnetizer 2 along its circumference, the flange structure can extend to the outside or inside of the magnetizer 2 and protrude from the magnetizer 2. Of course, the flange structure can also have two parts that extend to the outside and inside of the magnetizer 2 and protrude from the magnetizer 2 respectively. By integrally injection molding between the magnetizer 2 and the rotor body 1, and at least part of the flange structure is covered in the rotor body 1, the magnetizer 2 not only has a magnetic conductive role, but also can improve the strength of the magnetizer 2, ensure that the magnetizer 2 is not easy to deform and maintains good adaptability with the rotor body 1, ensure that the magnetizer 2 and the rotor body 1 meet the preset molding requirements after molding, and improve the quality of the rotor after molding.

[0049] In an optional embodiment of the utility model, the magnetizer 2 can be a steel ring formed by welding the whole steel strip end to end, and the end position of the steel ring is stamped and shaped to form a flange structure. Preferably, the magnetizer 2 can be cut from a round steel pipe to directly cut and form a round steel ring, and the end position of the steel ring (i.e. Figure 3 The top and / or bottom end of the middle magnet 2 is stamped and shaped to form the above-mentioned flange structure. This steel ring is a full-ring structure. There are no welding points or weak connection positions on the steel ring. The strength of each position of the steel ring is roughly the same. Therefore, not only can the overall strength of the magnet 2 be guaranteed, but also the molding process is simple. Magnets 2 of different sizes can be set according to actual needs to meet the requirements of the magnet 2 being compatible with the rotor body 1.

[0050] In the present invention, the steel ring can be made of but not limited to cold rolled carbon steel plate (SPCC). Of course, the steel ring can also be made of other steel materials with the same or similar performance as the cold rolled carbon steel plate, and the specific material of the steel ring is not limited here.

[0051] Furthermore, the thickness H of the steel ring is greater than or equal to 0.5 mm and less than or equal to 3 mm (ie, 0.5 mm ≤ H ≤ 3 mm) to provide sufficient strength.

[0052] In the present invention, the rotor body 1 is molded by plastic casting. In the process of producing the motor rotor, the magnetizer 2 and the plurality of magnetic steels 3 can be placed at a preset position in the mold, and then the rotor body 1 is cast into the mold, thereby realizing the injection molding between the rotor body 1 and the plurality of magnetic steels 3.

[0053] In an optional embodiment of the present invention, Figures 3 to 6As shown, the magnet 2 includes a circular annular body 201, and the flange structure includes a first flange 202 in the shape of an annulus, the first flange 202 is located at the top of the annular body 201, and the first flange 202 extends in the axial direction close to the annular body 201 (that is, extends to the inner side of the magnet 2 and protrudes inward from the magnet 2 body), so that the first flange 202 can be completely covered by the rotor body 1, so that the first flange 202 can not only improve the strength of the magnet 2, but also increase the connection area between the magnet 2 and the rotor body 1, so as to improve the connection strength between the magnet 2 and the rotor body 1 after injection molding, and ensure the stability of the motor rotor after molding. Among them, the cross section of the first flange 202 can be an arc section that extends obliquely toward the inner side of the magnet 2 and protrudes from the magnet 2 body.

[0054] Furthermore, an included angle θ between the first flange 202 and the annular body 201 is greater than or equal to 80° and less than or equal to 170° (ie, 80°≤θ≤170°).

[0055] Further, such as Figures 3 to 6 As shown, the flange structure also includes a second flange 203 in the shape of an annulus, the second flange 203 and the first flange 202 are located at the bottom end of the annular body 201, and the second flange 203 extends in the axial direction away from the annular body 201 (that is, extends to the outside of the magnet 2 and protrudes outward from the magnet 2 body), and at least one side of the outer wall of the second flange 203 can be connected to the rotor body 1. The second flange 203 has the same function as the first flange 202, and both can improve the strength of the magnet 2, and the second flange 203 cooperates with the first flange 202 to ensure the overall roundness of the magnet 2, and maximize the strength of the magnet 2. Among them, the cross section of the second flange 203 can be an arc section that extends obliquely toward the outside of the magnet 2 and protrudes out of the magnet 2 body.

[0056] In the above embodiment, the length and direction of the first flange 202 and the second flange 203 extending in the radial direction of the rotor body 1 can be adjusted according to the actual formation and size of the rotor body 1 to ensure that the first flange 202 and the second flange 203 can be adapted to the corresponding positions on the rotor body 1 in size and shape to achieve the purpose of injection molding. Figure 3 As shown, the first flange 202 extends toward the axial direction close to the annular body 201, and the inner diameter of the first flange 202 is smaller than the inner diameter of the edge of the rotor body 1, so that the first flange 202 can be completely covered in the rotor body 1, ensuring the connection strength between the first flange 202 and the rotor body 1 after injection molding.

[0057] In an optional embodiment of the present invention, Figures 4 to 6As shown, the first flange 202 is provided with a plurality of first connection parts 204 for enhancing the connection strength between the magnetizer 2 and the rotor body 1, and the plurality of first connection parts 204 are spaced and evenly distributed along the circumference of the first flange 202. The second flange 203 may also be provided with a plurality of first connection parts 204 for enhancing the connection strength between the magnetizer 2 and the rotor body 1, and the plurality of first connection parts 204 are spaced and evenly distributed along the circumference of the second flange 203. Of course, the plurality of first connection parts 204 may also be provided on the first flange 202 and the second flange 203 at the same time to improve the connection strength between the magnetizer 2 and the rotor body 1 after injection molding.

[0058] In this embodiment, the first connection portion 204 may be a notch (or slot) provided on the first flange 202 and / or the second flange 203, or a through hole provided on the first flange 202 and / or the second flange 203. When the magnetizer 2 and the rotor body 1 are injection molded, the injection material may enter the first connection portion 204 and form a connecting column in the first connection portion 204. The connecting column and the rotor body 1 are integrally injection molded, so that the magnetizer 2 and the rotor body 1 can be connected through the connecting column, thereby improving the connection strength between the magnetizer 2 and the rotor body 1. The number and shape of the notches, or the number and shape of the through holes are not limited here. Of course, the more notches or through holes there are, the better the connection strength. In the actual production process, the number and shape of the notches or through holes can be adjusted according to the size of the rotor body 1.

[0059] In an optional embodiment of the present invention, Figure 1 , Figure 3 , Figure 7 As shown, the edge of the rotor body 1 has a plurality of hollow portions 101, and the plurality of hollow portions 101 are spaced and evenly distributed along the circumference of the rotor body 1, and a plurality of magnetic steels 3 are located at corresponding hollow portions 101, and the magnetizer 2 is arranged on the outer circumference of the plurality of magnetic steels 3 along the circumference of the rotor body 1, and the inner wall of the annular body 201 is in contact with the outer wall of the plurality of magnetic steels 3, and the magnetizer 2 plays a role of magnetic conduction, and at least part of the annular body 201 and / or at least part of the second flange 203 are exposed to the outside of the rotor body 1.

[0060] Specifically, Figure 1 , Figure 3As shown, since the first flange 202 is completely covered in the rotor body 1 and injection molded with the rotor body 1, the connection strength between the magnetizer 2 and the rotor body 1 can be ensured. Therefore, the annular body 201 and the second flange 203 in the magnetizer 2 do not need to be completely covered by the rotor body 1, and the outer wall of the annular body 201 and / or part of the second flange 203 can be exposed to the outside of the rotor body 1. While meeting the connection strength, the amount of material required for molding the rotor body 1 can be reduced. Compared with the existing rotor body 1, the rotor body 1 in the utility model is simpler to produce, saves materials, and has better economy.

[0061] In an optional embodiment of the present invention, Figure 7 As shown, a plurality of second connection parts 102 are provided on the edge of the rotor body 1, and the rotor body 1 can be connected to the motor housing through the plurality of second connection parts 102. The second connection part 102 can be, but is not limited to, a connection hole with a screw therein or a card slot that can be engaged with a corresponding position of the motor housing, and the plurality of second connection parts 102 are spaced and evenly distributed along the edge of the rotor body 1 to ensure that the rotor body 1 can be stably connected to the motor housing.

[0062] The characteristics and advantages of the motor rotor in the utility model are:

[0063] 1. In the motor rotor, a flange structure is provided on the magnet 2, and at least part of the flange structure is injection molded between the rotor body 1, so that the magnet 2 not only has a magnetic conductive effect, but also can improve the strength of the magnet 2, ensure that the magnet 2 is not easy to deform (ensure the roundness of the magnet 2) and maintain good adaptability with the rotor body 1, ensure that the magnet 2 and the rotor body 1 meet the preset requirements after molding, and improve the rotor molding quality.

[0064] Second, in the motor rotor, the magnetizer 2 can be an integrally formed steel ring, and then a flanging structure is formed by stamping or the like. This has a simple process, low cost, and can improve product quality.

[0065] 3. In the motor rotor, due to the setting of the flange structure, the connection strength between the magnetizer 2 and the rotor body 1 can be ensured. Therefore, the rotor body 1 does not need to completely cover the magnetizer 2, so that at least part of the annular body 201 and / or at least part of the second flange 203 can be exposed outside the rotor body 1, which can save materials and has better economy.

[0066] Implementation Method 2

[0067] The utility model provides a motor, which includes the above-mentioned motor rotor, a transmission member 4 and a rotating shaft. The transmission member 4 is arranged on the motor rotor, the rotating shaft is connected to the motor rotor through the transmission member 4, and the motor rotor drives the rotating shaft of the motor to rotate through the transmission member 4.

[0068] Further, such as Figures 1 to 3 As shown, the transmission member 4 includes a coupling, and an assembly hole is opened in the middle of the motor rotor, and the coupling is arranged in the assembly hole.

[0069] Furthermore, the coupling and the motor rotor may be injection molded.

[0070] The motor of the utility model can be a direct drive motor.

[0071] The motor of the present invention has the characteristics and advantages of the motor rotor described above, which will not be described in detail here.

[0072] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A motor rotor, characterized in that: The motor rotor comprises: a rotor body having an annular rim; A plurality of magnetic steels are arranged on the rotor body, wherein the plurality of magnetic steels are distributed at intervals along the annular edge of the rotor body; The magnetizer is annular and has a flange structure extending outward and / or inward from the magnetizer along its circumference. The magnetizer and the rotor body are injection molded, and at least part of the flange structure is enclosed in the rotor body.

2. The motor rotor according to claim 1, characterized in that: The magnetic conductor includes an annular body, and the flange structure includes an annular first flange, the first flange is located at one end of the annular body, and the first flange extends toward the axial direction of the annular body so that the first flange can be completely covered by the rotor body.

3. The motor rotor according to claim 2, characterized in that: The flange structure includes a second annular flange, which is located at the other end of the annular body opposite to the first flange, and extends away from the axial direction of the annular body. At least one side outer wall of the second flange can be connected to the rotor body.

4. The motor rotor according to claim 3, characterized in that: The first flange and / or the second flange are provided with a plurality of first connection parts for enhancing the connection strength between the magnetic conductor and the rotor body.

5. The motor rotor according to claim 4, characterized in that: The first connecting portion is a notch or a through hole provided on the first flange and / or the second flange. When the magnetic conductor and the rotor body are injection molded, a connecting column is formed in the first connecting portion and is integrally molded with the rotor body.

6. The motor rotor according to claim 4 or 5, characterized in that: The plurality of first connection portions are distributed at intervals along the circumference of the first flange and / or the circumference of the second flange.

7. The motor rotor according to claim 3, characterized in that: The edge of the rotor body has a plurality of hollow parts, the plurality of magnetic steels are located at the corresponding hollow parts, and the magnetic conductor is arranged around the outer periphery of the plurality of magnetic steels along the circumferential direction of the rotor body; At least a portion of the annular body and / or at least a portion of the second flange is exposed outside the rotor body.

8. The motor rotor according to claim 3, characterized in that: The inner diameter of the first flange is smaller than the inner diameter of the annular edge of the rotor body.

9. The motor rotor according to claim 1, characterized in that: The magnetic conductor is a steel ring formed by welding or whole cutting, and the end position of the steel ring is punched to form the flange structure.

10. A motor, characterized in that: The motor comprises: The motor rotor according to any one of claims 1 to 9; A transmission member, wherein the transmission member is arranged on the motor rotor; A rotating shaft is connected to the motor rotor through the transmission member.

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