Rotor structure and motor

Abstract

The utility model discloses a rotor structure and a motor, the motor comprises the rotor structure, and the rotor structure comprises a rotor core, a permanent magnet and a plastic package body. Wherein the rotor core comprises a plurality of main bodies which are mutually independent and are arranged at intervals along the same circumferential direction, a magnetic steel groove is arranged between two adjacent main bodies, the plurality of permanent magnets are arranged in the magnetic steel grooves in a one-to-one correspondence manner, and the plastic package body wraps the peripheries of the rotor core and the permanent magnets. And a shaft hole for the rotating shaft to pass through is formed in the plastic package body. Wherein the length of the permanent magnet along the radial direction of the rotor structure and the length L2 of the side wall of the main body along the matching direction of the main body and the rotor iron core meet the relational expression that L2 is less than or equal to L1. According to the rotor structure and the motor, the problem that the manufacturing cost of a rotor structure in the prior art is too high is solved.

Description

Technical Field

[0001] The present application relates to the field of drive technology, and in particular to a rotor structure and a motor. Background Art

[0002] In the rotor structure of an existing permanent magnet motor, the rotor structure includes a rotor core, permanent magnets and a plastic encapsulation body. The rotor cores include multiple rotor cores, which are arranged at intervals around the rotor structure. The permanent magnets include multiple permanent magnets, which are arranged between two adjacent rotor cores. The plastic encapsulation body is covered on the outer periphery of the rotor core and the permanent magnets.

[0003] In the existing rotor structure, in order to limit the permanent magnets between two adjacent rotor cores, a limiting portion for limiting the permanent magnets needs to be provided on the rotor core, which results in an excessively long rotor core and an excessively high manufacturing cost of the rotor structure. Utility Model Content

[0004] The main purpose of the present application is to provide a rotor structure and a motor, so as to at least solve the problem of excessively high manufacturing costs of rotor structures in the prior art.

[0005] According to one aspect of the present application, a rotor structure is provided, comprising:

[0006] The rotor core comprises a plurality of independent main bodies spaced apart along the same circumferential direction, with a magnetic steel slot provided between two adjacent main bodies;

[0007] Permanent magnets, including a plurality of permanent magnets, each of which is disposed in a one-to-one correspondence in the magnetic steel slots;

[0008] A plastic package body, the plastic package body covering the outer circumference of the rotor core and the permanent magnet, and the plastic package body is provided with an axial hole for allowing the rotating shaft to pass through;

[0009] The length L1 of the permanent magnet along the radial direction of the rotor structure and the length L2 of the side wall of the main body along the matching direction of the main body and the rotor core satisfy the relationship: L2≤L1.

[0010] Furthermore, L2 and L1 satisfy the relationship: 2mm≤L1-L2≤4mm.

[0011] Furthermore, L2 satisfies the relationship: 10mm≤L2≤20mm.

[0012] Furthermore, the plastic package body is provided with a limiting groove along the axial direction of the shaft hole, and the limiting groove is formed by embedding a limiting piece on the inner side of the rotor structure when the plastic package body is formed by injection molding.

[0013] Furthermore, a depth L3 of the limiting groove along the axial direction of the shaft hole satisfies the relationship: 0.5 mm ≤ L3 ≤ 5 mm.

[0014] Furthermore, the limiting grooves include a plurality of limiting grooves, each of which is spaced apart around the shaft hole, and one end of the limiting groove away from the radial direction of the shaft hole extends to an end of the adjacent permanent magnet close to the shaft hole.

[0015] Furthermore, the projection surface of the main body in the axial direction of the rotor structure includes:

[0016] a first oblique edge, the first oblique edge being inclined along a radial direction of the rotor structure;

[0017] a second oblique edge, the second oblique edge being inclined in a radial direction of the rotor structure and being arranged in a mirror image with the first oblique edge;

[0018] an arcuate edge, wherein two ends of the arcuate edge are respectively connected to an end of the first oblique edge facing away from the shaft hole and an end of the second oblique edge facing away from the shaft hole;

[0019] A straight edge, with two ends of the straight edge respectively connected to one end of the first oblique edge close to the shaft hole and one end of the second oblique edge close to the shaft hole.

[0020] Furthermore, the main body is provided with an injection hole and a positioning hole along the axial direction of the rotor structure.

[0021] Furthermore, the rotor core includes a plurality of rotor punchings, and the plurality of rotor punchings are stacked to form the rotor core.

[0022] On the other hand, the present application provides a motor, which includes the above-mentioned rotor structure.

[0023] Compared with the prior art, in the present application, the length L1 of the permanent magnet along the radial direction of the rotor structure and the length L2 of the side wall of the main body along the matching direction of the main body and the rotor core satisfy the relationship: L2≤L1. At the same time, the plastic encapsulation body is wrapped around the outer periphery of the rotor core and the permanent magnet. Usually, after selecting a specific model of permanent magnet, the length L1 of the permanent magnet along the radial direction of the rotor structure remains unchanged; that is, after the permanent magnet is inserted into the magnetic steel slot, the permanent magnet and the rotor core are plastic-encapsulated, and the plastic encapsulation body presses against the permanent magnet, thereby fixing and limiting the permanent magnet; since the plastic encapsulation body limits the permanent magnet, there is no need to set a limiting part on the main body. When there is no limiting part on the main body, L2 is less than or equal to L1, so that the length L2 of the side wall of the main body can be set smaller, thereby reducing the manufacturing cost of the rotor core to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1 It is a partial structural diagram of the rotor structure in the prior art (excluding the plastic package);

[0026] Figure 2 A schematic diagram of the structure of the rotor structure and the rotating shaft assembly disclosed in this application;

[0027] Figure 3 A cross-sectional view of the assembly of the rotor structure and the rotating shaft disclosed in this application;

[0028] Figure 4 A schematic structural diagram of the rotor structure disclosed in this application;

[0029] Figure 5 This is a partial structural diagram of the rotor structure disclosed in this application (excluding the plastic package);

[0030] Figure 6 This is a partial structural diagram of the rotor structure disclosed in this application (excluding the plastic package and some permanent magnets);

[0031] Figure 7 This is a schematic diagram of the cooperation between the main body and the permanent magnet disclosed in this application;

[0032] Figure 8 It is the projection surface of the main body disclosed in this application in the axial direction of the rotor structure;

[0033] Figure 9 A schematic diagram showing the change of back electromotive force of the motor of the present application and the motor of the prior art over time;

[0034] Figure 10 This is a schematic diagram of the rotor punching formed by stamping steel plates in this application.

[0035] The above drawings include the following reference numerals:

[0036] 10. Rotor core; 20. Permanent magnet; 30. Plastic package body; 31. Limiting groove; 32. Shaft hole; 40. Rotating shaft; 50. Limiting part; 100. Main body; 101. Positioning hole; 102. Injection hole; 103. Magnetic steel slot; 104. Stop flange; 105. First oblique edge; 106. Second oblique edge; 107. Arc edge; 108. Straight edge; 1000. Rotor punching sheet. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0039] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary, not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0040] See also Figures 1 to 7 As shown, according to an embodiment of the present application, a motor is provided. The motor includes a rotor structure. The rotor structure includes a rotor core 10 , a permanent magnet 20 and a plastic package 30 .

[0041] The rotor core 10 includes a plurality of independent main bodies 100 spaced apart along the same circumferential direction. A magnetic steel slot 103 is provided between two adjacent main bodies 100. The rotor core 10 includes a plurality of permanent magnets 20, each disposed in a one-to-one correspondence within the magnetic steel slots 103. A plastic encapsulation body 30 covers the outer circumference of the rotor core 10 and the permanent magnets 20, and is provided with an axial hole 32 for the rotation shaft 40 to pass through. The length L1 of the permanent magnet 20 along the radial direction of the rotor structure and the length L2 of the sidewall of the main body 100 along the mating direction between the main body 100 and the rotor core 10 satisfy the relationship: L2 ≤ L1.

[0042] Specifically, as attached Figure 1As shown, in the existing rotor structure, in order to fix the permanent magnet 20 in the magnetic steel slot 103, a limit portion 50 is provided on the side of the main body 100 near the shaft hole 32. The limit portion 50 is used to limit the position of the permanent magnet 20. However, the provision of the limit portion 50 on the main body 100 makes the radial length of the main body 100 too long. That is, in the existing rotor structure, L1 is smaller than L2, which increases the manufacturing cost of the rotor core 10.

[0043] In order to solve the above problem, in this embodiment, the length L1 of the permanent magnet 20 along the radial direction of the rotor structure and the length L2 of the side wall of the main body 100 along the matching direction of the main body 100 and the rotor core 10 satisfy the relationship: L2≤L1. At the same time, the plastic package 30 is wrapped around the outer periphery of the rotor core 10 and the permanent magnet 20. Usually, after a specific type of permanent magnet 20 is selected, the length L1 of the permanent magnet 20 along the radial direction of the rotor structure is fixed; that is, the permanent magnet 20 is inserted into the magnetic steel slot 1 03, the permanent magnet 20 and the rotor core 10 are then plastic-sealed, and the plastic-sealed body 30 presses against the permanent magnet 20, thereby fixing and limiting the permanent magnet 20; since the plastic-sealed body 30 limits the permanent magnet 20, there is no need to set a limiting portion 50 on the main body 100. When there is no limiting portion 50 on the main body 100, L2 is less than or equal to L1, so that the length L2 of the side wall of the main body 100 can be set smaller, thereby reducing the manufacturing cost of the rotor core 10 to a certain extent. It is worth noting that the "side wall of the main body 100" refers to the side wall in contact with the permanent magnet 20, and the "matching direction" refers to the direction of the matching surface of the side wall of the main body 100 and the permanent magnet 20 away from the main body 100 and close to the shaft hole 32, as shown in the attached figure. Figure 7 As shown in the X1 direction, the matching direction between one side wall of the main body 100 and the permanent magnet 20 is given.

[0044] In a specific embodiment, the existing main body 100 and the main body 100 of this embodiment have the same dimensions except for the different L2 setting size. By measuring the projected area S1 of the existing main body 100 in the axial direction of the rotor structure, it is 109.01mm. 2 , and according to this embodiment, the projection area S2 of the improved main body 100 in the axial direction of the rotor structure is 105.313 mm 2 It can be found that the volume of the main body 100 of this embodiment is obviously smaller than that of the existing main body 100, thereby reducing the manufacturing cost of the rotor core 10 to a certain extent. In addition, the relationship between the change of the back electromotive force over time in the existing rotor structure and the rotor structure of this application is also measured in this embodiment. Please refer to the attached Figure 9As shown in the figure, curve A is the relationship between the change of the back electromotive force in the rotor structure of the present application and time, and curve B in the figure is the relationship between the change of the back electromotive force in the existing rotor structure and time. It can be found that the range of the back electromotive force in the rotor structure of the present application is larger than the range of the back electromotive force in the existing rotor structure. This is because the volume of the rotor structure of the present application is smaller, which reduces the magnetic energy loss in the rotor core 10, and thus makes the peak value of the back electromotive force larger and the valley value lower, which also means that the control accuracy of the motor of the present application is better and the electromagnetic field in the motor is more stable.

[0045] Furthermore, L2 and L1 satisfy the relationship: 2mm≤L1-L2≤4mm.

[0046] Specifically, L1 is usually a fixed value. When the difference between L1 and L2 is greater than 4mm, the volume of the main body 100 is small and the length of the rotor core 10 in the radial direction is too low, resulting in a decrease in the structural strength of the rotor structure as a whole. When the difference between L1 and L2 is less than 2mm, the material saving of the rotor core 10 is small, and the cost reduction of manufacturing the rotor core 10 is small. When L2 and L1 satisfy the relationship 2mm≤L1-L2≤4mm, the length of the rotor core 10 in the radial direction will neither be too low, resulting in a decrease in the structural strength of the rotor structure, nor result in a small reduction in the cost of the rotor core 10. The difference between L1 and L2 can be 2mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3mm, 3.2mm, 3.4mm, 3.6mm, 3.8mm and 4mm.

[0047] Furthermore, L2 satisfies the relationship: 10mm≤L2≤20mm. In this embodiment, in motors of different sizes, the size of L2 of the main body 100 should be different, so as to adapt to a variety of motors of different sizes. The value of L2 can be 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm and 20mm. When L2 is less than 10mm, the length of the side wall of the main body 100 is too low, the length of the rotor core 10 in the radial direction is short, and the overall strength of the rotor structure is too low. Even in small motors, the rotor core 10 is difficult to use. When L2 is greater than 20mm, the length of the rotor core 10 in the radial direction is too long, and the manufacturing cost is too high.

[0048] As attached Figure 2 To the attached Figure 3As shown, the plastic encapsulation body 30 is provided with a limiting groove 31 along the axial direction of the shaft hole 32. The limiting groove 31 is formed by embedding a limiting member (not shown in the figure) on the inner side of the rotor structure when the plastic encapsulation body 30 is formed by injection molding. It is understandable that when the rotor core 10 and the permanent magnet 20 are plastic encapsulated, the limiting member needs to be sleeved on the rotating shaft 40. At this time, one end of the limiting member abuts against the permanent magnet 20 to limit the permanent magnet 20 and prevent the permanent magnet 20 from moving in the radial direction. After the injection molding is completed, the limiting member is removed, and the limiting groove 31 is formed on the plastic encapsulation body 30. The provision of the limiting groove 31 on the plastic encapsulation body 30 can further reduce the manufacturing cost of the rotor structure to a certain extent, that is, the presence of the limiting groove 31 reduces the amount of plastic encapsulation material used during plastic encapsulation to a certain extent.

[0049] Furthermore, the depth L3 of the retaining groove 31 along the axial direction of the shaft hole 32 satisfies the relationship: 0.5mm≤L3≤5mm. When L3 satisfies this relationship, the depth of the retaining groove 31 is neither too deep, which would weaken the structural strength of the plastic package 30 and thus affect the rotor structure. The depth of the retaining groove 31 is neither too shallow, which would prevent the retaining member from abutting against the permanent magnet 20 during injection molding, potentially allowing the permanent magnet 20 to move radially. In other words, when L3 is less than 0.5mm, the retaining member may not abut against the permanent magnet 20 during injection molding, allowing the permanent magnet 20 to move radially. When L3 is greater than 5mm, the structural strength of the plastic package 30 is too low, potentially causing damage to the rotor structure during rotation. The values ​​of L3 can be 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, and 5mm.

[0050] As attached Figure 2 As shown, there are multiple limiting grooves 31 , each limiting groove 31 is arranged at intervals around the shaft hole 32 , and one end of the limiting groove 31 away from the radial direction of the shaft hole 32 extends to the end of the adjacent permanent magnet 20 close to the shaft hole 32 .

[0051] It is understandable that the provision of multiple limiting grooves 31 can reduce the manufacturing cost of the rotor structure to a certain extent; in addition, one end of the limiting groove 31 extends to the adjacent permanent magnet 20, so that the end of the permanent magnet 20 close to the limiting groove 31 is located in the limiting groove 31, that is, during injection molding, the limiting member can abut against the end of the permanent magnet 20 close to the shaft hole. It should be noted that, as shown in the attached Figure 3 As shown, in this embodiment, the plastic package body 30 has limiting grooves 31 at both ends of the shaft hole 32 in the axial direction, so that the rotor structure is subjected to uniform force at all locations, thereby preventing the shaft 40 from deflecting during rotation and causing wear of the rotor structure or the shaft 40.

[0052] Furthermore, the projection of the main body 100 in the axial direction of the rotor structure includes a first oblique edge 105, a second oblique edge 106, an arcuate edge 107, and a straight edge 108. The first oblique edge 105 is inclined in the radial direction of the rotor structure, the second oblique edge 106 is inclined in the radial direction of the rotor structure, and is a mirror image of the first oblique edge 105. The two ends of the arcuate edge 107 are respectively connected to the end of the first oblique edge 105 facing away from the shaft hole 32 and the end of the second oblique edge 106 facing away from the shaft hole 32. The two ends of the straight edge 108 are respectively connected to the end of the first oblique edge 105 close to the shaft hole 32 and the end of the second oblique edge 106 close to the shaft hole 32.

[0053] Specifically, in this embodiment, the projection surface of the main body 100 is configured as a fan-shaped structure. In addition, the length L2 refers to the length of the first oblique side 105 and the second oblique side 106. When the projection surface of the main body 100 is configured as a fan-shaped structure, a magnetic steel slot 103 can be formed between two adjacent main bodies 100 for the permanent magnet 20 to penetrate. Multiple fan-shaped structures and multiple permanent magnets 20 are arranged in an interlaced manner, so that the rotor core 10 and the permanent magnet 20 form a cylindrical structure, thereby ensuring that the force on each main body 100 and each permanent magnet 20 is uniform. In this embodiment, the straight edge 108 can also be configured as an arc edge. The configuration of the arc edge can further reduce the manufacturing material of the rotor core 10, thereby reducing the manufacturing cost of the rotor core 10.

[0054] In a specific embodiment, a stop flange 104 is provided on the main body 100. The stop flange 104 is provided on the side of the main body 100 away from the shaft hole 32 and is located at one end of the side close to the magnetic steel slot 103. When the permanent magnet 20 is placed in the magnetic steel slot 103, the stop flange 104 can play a certain stopping role on the permanent magnet 20, thereby preventing the permanent magnet 20 from moving in the radial direction of the shaft hole 32.

[0055] Furthermore, the rotor core 10 includes a plurality of rotor punchings 1000, which are stacked to form the rotor core 10. Specifically, as shown in the attached Figure 10 As shown, during the manufacture of rotor laminations 1000, they are produced by stamping steel plates in parallel and staggered manner, thereby maximizing the use of the steel plates and further reducing manufacturing costs. Furthermore, the rotor core 10 is composed of multiple rotor laminations 1000 stacked together. To adjust the thickness of the rotor core 10, simply increase or decrease the number of rotor laminations 1000.

[0056] Furthermore, an injection hole 102 and a positioning hole 101 are provided through the main body 100 along the axial direction of the rotor structure.

[0057] Specifically, when the rotor core 10 and the permanent magnet 20 are injection molded, the rotor core 10 and the permanent magnet 20 are first placed in an injection mold. The injection mold is provided with a positioning piece that is adapted to the positioning hole 101. The positioning piece is inserted into the positioning hole 101 to position each body 100. When the rotor core 10 is injection molded, the injection plastic can flow through the injection hole 102 to the other side of the rotor core 10 and the permanent magnet 20, and coat the rotor core 10 and the permanent magnet 20. In addition, the limiting groove 31 is also formed during the injection molding, that is, the rotating shaft 40 needs to be installed during the injection molding, and a limiting piece that is adapted to the shape of the limiting groove 31 is sleeved on the rotating shaft 40. After the injection molding is completed, the limiting groove 31 can be formed on the plastic package 30.

[0058] In summary, the rotor structure and motor of the present application have at least the following beneficial effects: the permanent magnets 20 and the rotor core 10 are fixed by the plastic encapsulation body 30, so that the permanent magnets 20 and the rotor core 10 form an integral structure. When the rotor structure rotates, the permanent magnets 20 and the rotor core 10 will not separate under the action of centrifugal force. In addition, the length L2 of the side wall of the main body 100 in the present application is less than or equal to the length L1 of the permanent magnet 20 in the radial direction, which reduces the material used in the rotor core 10, thereby saving the manufacturing cost of the rotor structure to a certain extent. On the other hand, a limiting groove 31 is also provided on the plastic encapsulation body 30 of the present application. When the permanent magnet 20 is injection molded, the limiting member can limit the permanent magnet 20, thereby preventing the permanent magnet 20 from shaking in the radial direction. The present application also digitally simulates the performance of the existing motor and the motor of the present application. It can be found that the performance of the motor of the present application is better than that of the motor in the prior art.

[0059] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0060] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0061] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A rotor structure, characterized in that: include: A rotor core (10), the rotor core (10) comprising a plurality of mutually independent main bodies (100) spaced apart along the same circumferential direction, with a magnetic steel slot (103) provided between two adjacent main bodies (100); Permanent magnets (20), the permanent magnets (20) comprising a plurality of permanent magnets (20), the permanent magnets (20) being arranged in a one-to-one correspondence within the magnetic steel slots (103); A plastic package body (30), the plastic package body (30) covering the outer periphery of the rotor core (10) and the permanent magnet (20), and the plastic package body (30) is provided with an axial hole (32) for allowing the rotating shaft (40) to pass through; The length L1 of the permanent magnet (20) along the radial direction of the rotor structure and the length L2 of the side wall of the main body (100) along the matching direction of the main body (100) and the rotor core (10) satisfy the relationship: L2≤L1.

2. The rotor structure according to claim 1, characterized in that: The relationship between L2 and L1 is: 2mm≤L1-L2≤4mm.

3. The rotor structure according to claim 1, characterized in that: Wherein L2 satisfies the relationship: 10mm≤L2≤20mm.

4. The rotor structure according to claim 1, characterized in that: The plastic package body (30) is provided with a limiting groove (31) along the axial direction of the shaft hole (32); the limiting groove (31) is formed by embedding a limiting piece on the inner side of the rotor structure when the plastic package body (30) is formed by injection molding.

5. The rotor structure according to claim 4, characterized in that: The depth L3 of the limiting groove (31) along the axial direction of the shaft hole (32) satisfies the relationship: 0.5 mm ≤ L3 ≤ 5 mm.

6. The rotor structure according to claim 4, characterized in that: The limiting grooves (31) include a plurality of limiting grooves (31), each of which is spaced apart around the shaft hole (32). One end of the limiting groove (31) that is away from the radial direction of the shaft hole (32) extends to an end of the adjacent permanent magnet (20) that is close to the shaft hole (32).

7. The rotor structure according to claim 1, characterized in that: The projection surface of the main body (100) in the axial direction of the rotor structure includes: a first oblique edge (105), the first oblique edge (105) being inclined in a radial direction of the rotor structure; a second oblique edge (106), the second oblique edge (106) being inclined in a radial direction of the rotor structure and being arranged in a mirror image with the first oblique edge (105); An arcuate edge (107), two ends of the arcuate edge (107) are respectively connected to an end of the first oblique edge (105) facing away from the shaft hole (32) and an end of the second oblique edge (106) facing away from the shaft hole (32); A straight edge (108), two ends of the straight edge (108) are respectively connected to one end of the first oblique edge (105) close to the shaft hole (32) and one end of the second oblique edge (106) close to the shaft hole (32).

8. The rotor structure according to any one of claims 1 to 7, characterized in that: The main body (100) is provided with an injection hole (102) and a positioning hole (101) penetrating along the axial direction of the rotor structure.

9. The rotor structure according to any one of claims 1 to 7, characterized in that: The rotor core (10) comprises a plurality of rotor punching sheets (1000), and the plurality of rotor punching sheets (1000) are stacked to form the rotor core (10).

10. A motor, characterized in that: The electric motor comprises the rotor structure according to any one of claims 1 to 9.

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