Rotor structure and motor having the same

Abstract

The present application provides a rotor structure and a motor having the same, comprising a rotor body and a damping structure, the damping structure being arranged circumferentially around the rotor body; a connection group is provided on the rotor body, the connection group comprising multiple connection positions, the multiple connection positions in each connection group being arranged sequentially in the axial direction of the rotor body, and the multiple connection positions in each connection group being arranged sequentially in the circumferential direction of the rotor body, the multiple connection positions in each connection group on the rotor body being connected to the damping structure, so that a spiral connection is formed between the rotor body and the damping structure. According to the rotor structure and the motor having the same of the present application, the structural stability of the damping rotor can be enhanced.

Description

Technical Field

[0001] The present application belongs to the field of motor technology, and specifically relates to a rotor structure and a motor having the same. Background Art

[0002] At present, in the rapid development of permanent magnet brushless DC motors, surface-mounted rotors have always dominated due to their stability and safety. Although embedded rotors are also being promoted during the development of the industry, embedded rotors cannot meet the requirements under working conditions with high requirements on noise and vibration. Surface-mounted shock-absorbing rotors are the first choice for motor rotor selection.

[0003] However, the current damping rotor has insufficient strength to meet the needs of commercial motors, which have high requirements for motor noise and vibration while meeting electromagnetic performance.

[0004] Therefore, how to provide a rotor structure that can enhance the structural stability of the damping rotor and a motor having the same has become a problem that those skilled in the art urgently need to solve. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present application is to provide a rotor structure and a motor having the same, which can enhance the structural stability of the shock-absorbing rotor.

[0006] In order to solve the above problems, the present application provides a rotor structure, including a rotor body and a shock-absorbing structure, which is arranged circumferentially around the rotor body; a connection group is provided on the rotor body, and the connection group includes multiple connection positions, and the multiple connection positions in each connection group are arranged sequentially in the axial direction of the rotor body, and the multiple connection positions in each connection group are arranged sequentially in the circumferential direction of the rotor body, and the multiple connection positions in each connection group on the rotor body are connected to the shock-absorbing structure, so that a spiral connection is formed between the rotor body and the shock-absorbing structure.

[0007] Furthermore, the rotor body further comprises an inner rotor and an outer rotor, the inner rotor being arranged on the inner circumference side of the outer rotor, and the shock absorbing structure being arranged between the inner rotor and the outer rotor;

[0008] The connection group includes an inner circumference connection group, the connection position includes an inner circumference connection position, a plurality of inner circumference connection positions form an inner circumference connection group, and the inner circumference connection position is arranged on the inner circumference side of the outer rotor; the plurality of inner circumference connection positions in each inner circumference connection group are arranged sequentially in the axial direction of the outer rotor, and the plurality of inner circumference connection positions in each inner circumference connection group are arranged sequentially in the circumferential direction of the outer rotor, and the plurality of inner circumference connection positions in each inner circumference connection group on the outer rotor are connected to the damping structure, so that a spiral connection is formed between the outer rotor and the damping structure;

[0009] And / or, the connection group includes a peripheral connection group, the connection position includes a peripheral connection position, a plurality of peripheral connection positions form a peripheral connection group, and the peripheral connection positions are arranged on the peripheral side of the inner rotor; the plurality of peripheral connection positions in each peripheral connection group are arranged sequentially in the axial direction of the inner rotor, and the plurality of peripheral connection positions in each peripheral connection group are arranged sequentially in the circumferential direction of the inner rotor, and the plurality of peripheral connection positions in each peripheral connection group on the inner rotor are connected to the shock-absorbing structure, so that a spiral connection is formed between the inner rotor and the shock-absorbing structure.

[0010] Furthermore, a tooth portion is provided at the connection position of the rotor body, a groove is correspondingly provided on the shock-absorbing structure, and the tooth portion is provided in the groove.

[0011] Further, when the rotor body further includes an inner rotor and an outer rotor, and a tooth portion is provided at the connection position of the rotor body, the inner rotor includes a first inner section, and the tooth portion includes an outer tooth portion; the outer tooth portion is provided on the outer circumferential wall of the first inner section; the outer rotor includes a first outer section, and the positions of the first outer section and the first inner section in the axial direction correspond to each other; the tooth portion includes an inner tooth portion, and the inner tooth portion is provided on the inner circumferential wall of the first outer section, and the outer tooth portion and the inner tooth portion are spaced apart in the circumferential direction of the rotor body.

[0012] Furthermore, the inner rotor also includes a second inner section, which is a uniform annular structure, and the first inner section and the second inner section are spaced apart in the axial direction of the rotor body; the outer rotor also includes a second outer section, which is a uniform annular structure, and the first outer section and the second outer section are spaced apart in the axial direction of the rotor body; the second outer section and the second inner section have corresponding positions in the axial direction.

[0013] Furthermore, first inner sections are provided at both axial ends of the rotor body.

[0014] Furthermore, the first inner section is formed by stacking the first punching sheets; and / or, the second inner section is formed by stacking the second punching sheets; and / or, the first outer section is formed by stacking the third punching sheets; and / or, the second outer section is formed by stacking the fourth punching sheets.

[0015] Furthermore, the connection positions in each connection group are evenly arranged in the circumferential direction of the rotor body.

[0016] Furthermore, the number of connection groups is set to at least two, and the connection groups are arranged sequentially in the circumferential direction of the rotor body; and the positions of the connection groups in the axial direction correspond to each other.

[0017] Furthermore, the central angle occupied by two circumferentially adjacent connection positions in each connection group on the cross section of the rotor body is L°; the central angle occupied by two adjacent connection groups on the cross section of the rotor body is P°; P° / L°=m; where m is an integer.

[0018] According to another aspect of the present application, a motor is provided, including a rotor structure, which is the above-mentioned rotor structure.

[0019] The rotor structure and the motor having the same provided in the present application can enhance the structural stability of the shock-absorbing rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the rotor structure of some embodiments of the present application;

[0021] Figure 2 This is a schematic structural diagram of the first inner section of the inner rotor in some embodiments of the present application;

[0022] Figure 3 This is a schematic structural diagram of the second inner section of the inner rotor in some embodiments of the present application;

[0023] Figure 4 A schematic structural diagram of the first outer section of the outer rotor in some embodiments of the present application;

[0024] Figure 5 A schematic structural diagram of the second outer section of the outer rotor in some embodiments of the present application;

[0025] Figure 6 Schematic diagram of the structure of the shock absorbing structure in some embodiments of the present application;

[0026] Figure 7 Schematic diagram of the structure of the inner rotor in some embodiments of the present application;

[0027] Figure 8 Schematic diagram of the structure of the outer rotor in some embodiments of the present application;

[0028] Figure 9 Schematic cross-sectional view of the rotor structure in some embodiments of the present application;

[0029] Figure 10 Schematic diagram of the rotor structure of some embodiments of the present application;

[0030] Figure 11 Schematic diagram of the rotor structure of some embodiments of the present application;

[0031] Figure 12 Schematic diagram of the rotor structure of some embodiments of the present application;

[0032] Figure 13 Schematic diagram of the rotor structure of some embodiments of the present application;

[0033] Figure 14 This is a top view of the rotor structure of some embodiments of the present application.

[0034] The reference numerals indicate:

[0035] 1. Inner rotor; 11. External tooth portion; 12. First inner section; 13. Second inner section; 2. External rotor; 21. Internal tooth portion; 22. First outer section; 23. Second outer section; 3. Shock-absorbing structure; 31. Groove; 4. Magnetic tile positioning boss; 41. Magnetic tile; 5. Thread line; 6. Plastic packaging. DETAILED DESCRIPTION

[0036] See also Figure 1-14 As shown, a rotor structure includes a rotor body and a shock-absorbing structure 3, wherein the shock-absorbing structure 3 is arranged circumferentially around the rotor body; a connection group is provided on the rotor body, wherein the connection group includes a plurality of connection positions, wherein the plurality of connection positions in each connection group are arranged sequentially in the axial direction of the rotor body, and the plurality of connection positions in each connection group are arranged sequentially in the circumferential direction of the rotor body, and the plurality of connection positions in each connection group on the rotor body are connected to the shock-absorbing structure 3, so that a spiral connection is formed between the rotor body and the shock-absorbing structure 3. The present application connects the rotor body and the shock-absorbing structure 3 through an axial spiral line, thereby increasing the contact area between the rotor body and the shock-absorbing structure 3, reducing the axial deformation of the rotor structure, and enhancing the structural strength. The rotor structure of the present application is a shock-absorbing rotor. The spiral connection described in the present application can be a continuous spiral connection (multiple connection positions are closely connected to form a continuous spiral connection), or it can be an intermittent spiral, for example, a spiral groove is provided on the shock-absorbing body, and a spiral protrusion is provided on the outer peripheral wall of the rotor body, and the spiral protrusion is provided in the spiral groove and connected by a concave-convex matching structure; or it can be fixed one by one at the intermittent connection positions by multiple fixing structures to form an intermittent spiral connection. The present application uses a spiral connection to enable the rotor body to have more positions to match with the shock-absorbing rubber, increase the constraint surface, and strengthen the structure; and through the change of the axial spiral line, increase the contact area between the rotor core and the shock-absorbing rubber, reduce the axial deformation of the shock-absorbing rotor, and enhance the structural strength. The present application assembles the rotor by a spiral connection method, and the threaded fitting strength is much higher than the straight-insert fitting strength, and the threaded fitting increases the axial fitting area between the rotor core and the shock-absorbing rubber, reducing the stress on the fitting surface.

[0037] This application also discloses some embodiments in which the rotor body includes an inner rotor 1 and an outer rotor 2. The inner rotor 1 is disposed on the inner circumference of the outer rotor 2, and a damping structure 3 is disposed between the inner rotor 1 and the outer rotor 2. A gap is formed between the inner rotor 1 and the outer rotor 2, and the damping structure 3 is an annular structure. The radial thickness of the damping structure 3 is uniform throughout, ensuring consistent fit strength at all locations and achieving a better damping effect.

[0038] The present application also discloses some embodiments, wherein the connection group includes an inner circumference connection group, the connection position includes an inner circumference connection position, a plurality of inner circumference connection positions form an inner circumference connection group, and the inner circumference connection position is arranged on the inner circumference side of the outer rotor 2; the plurality of inner circumference connection positions in each group of inner circumference connection groups are arranged sequentially in the axial direction of the outer rotor 2, and the plurality of inner circumference connection positions in each group of inner circumference connection groups are arranged sequentially in the circumferential direction of the outer rotor 2, and the plurality of inner circumference connection positions in each group of inner circumference connection groups on the outer rotor 2 are connected to the shock-absorbing structure 3, so that a spiral connection is formed between the outer rotor 2 and the shock-absorbing structure 3, which can increase the contact area between the outer rotor 2 and the shock-absorbing structure 3, reduce the axial deformation of the shock-absorbing rotor, and enhance the structural strength.

[0039] The present application also discloses some embodiments, wherein the connection group includes an outer peripheral connection group, the connection positions include outer peripheral connection positions, and a plurality of outer peripheral connection positions form an outer peripheral connection group, and the outer peripheral connection positions are arranged on the outer periphery of the inner rotor 1. The plurality of outer peripheral connection positions in each outer peripheral connection group are sequentially arranged in the axial direction of the inner rotor 1, and the plurality of outer peripheral connection positions in each outer peripheral connection group are sequentially arranged in the circumferential direction of the inner rotor 1. The plurality of outer peripheral connection positions in each outer peripheral connection group on the inner rotor 1 are connected to the damping structure 3, so that a helical connection is formed between the inner rotor 1 and the damping structure 3. This can increase the contact area between the inner rotor 1 and the damping structure 3, further reduce the axial deformation of the damping rotor, and enhance the structural strength.

[0040] The rotor structure of this application consists of an inner rotor 1, an outer rotor 2, a damping structure 3, a plastic coating 6, and magnetic tiles 41. The inner and outer rotors are each composed of two types of punchings (one with teeth and one without teeth). The toothed surfaces of the inner and outer cores are mated, with each mating surface corresponding to the other. The damping structure 3 is made of damping rubber. This application can design a damping rubber injection molding based on the rotor core structure. Furthermore, the rotor core, damping rubber, magnetic tiles 41, and plastic coating are integrated to enhance structural strength.

[0041] The present application also discloses some embodiments in which a tooth portion is provided at the connection position of the rotor body, and a groove 31 is correspondingly provided on the damping structure 3, and the tooth portion is disposed in the groove 31. The present application forms a concave-convex matching structure by forming the tooth portion and the groove 31 to limit the position of the rotor body and the damping structure 3.

[0042] The present application also discloses some embodiments. When the rotor body further includes an inner rotor 1 and an outer rotor 2, and a tooth portion is provided at the connection position of the rotor body, the inner rotor 1 includes a first inner section 12, and the tooth portion includes an outer tooth portion 11; the outer tooth portion 11 is provided on the outer peripheral wall of the first inner section 12; the outer rotor 2 includes a first outer section 22, and the first outer section 22 and the first inner section 12 are positioned correspondingly in the axial direction; the tooth portion includes an inner tooth portion 21, and the inner tooth portion 21 is provided on the inner peripheral wall of the first outer section 22. In the circumferential direction of the rotor body, the outer tooth portion 11 and the inner tooth portion 21 are spaced apart. A tooth groove is formed between two adjacent inner teeth 21 on the outer rotor 2, and the tooth groove is arranged correspondingly to the position and shape of the outer teeth 11 on the inner rotor 1. At this time, the gap between the inner and outer rotors 2 is adapted to the shape of the inner teeth 21 and the outer teeth 11, and the shape of the shock absorbing structure 3 is adapted to the shape of the inner teeth 21 and the outer teeth 11; the radial thickness of the shock absorbing structure 3 is equal everywhere, which can make the matching strength at all places equal, so that the shock absorption effect is better, that is, Figure 10 As shown, the clearance between the rotor core and the damping rubber is h1≈h2, and the radial and tangential fit strengths are equivalent. Here, h1 is the radial thickness of the circumferential extension of the damping structure 3, and h2 is the circumferential thickness of the radial extension of the damping structure 3. Both are the thickness of the damping structure 3.

[0043] The number of the inner teeth 21 on the inner circumference of the first outer section 22 and the outer teeth 11 on the outer circumference of the first inner section 12 are both at least two. The number of teeth of the rotor core punchings can also be designed according to the size of the internal space of the rotor. The number of the inner teeth 21 and the outer teeth 11 are the same, and the number of the two is positively correlated with the size of the internal space of the rotor.

[0044] The present application also discloses some embodiments, in which the inner rotor 1 further includes a second inner segment 13, which is a uniform annular structure, and the first inner segment 12 and the second inner segment 13 are spaced apart in the axial direction of the rotor body; the outer rotor 2 further includes a second outer segment 23, which is a uniform annular structure, and the first outer segment 22 and the second outer segment 23 are spaced apart in the axial direction of the rotor body; the second outer segment 23 corresponds to the second inner segment 13 in axial position.

[0045] That is, the second inner section 13 is an annular structure without the outer tooth portion 11, and the first inner section 12 only has the outer tooth portion 11 compared with the structure of the second inner section 13; the second outer section 23 is an annular structure without the inner tooth portion 21, and the first outer section 22 only has the inner tooth portion 21 compared with the structure of the second outer section 23.

[0046] The present application also discloses some embodiments, in which a first inner section 12 is provided at both axial ends of the rotor body, that is, the first inner section 12 with a tooth portion is located at the axial ends of the rotor body, and the second inner section 13 without a tooth portion is located at the axial middle position of the rotor body, and the middle position may also be provided with a first inner section 12 with a tooth portion; for example, the inner rotor 1 is provided with a first section, a second section and a first section in sequence in the axial direction; or, the inner rotor 1 is provided with a first section, a second section, a first section and a second section and a first section in sequence in the axial direction, so that the connection between the entire rotor body and the shock-absorbing structure 3 can be made more stable, and the poor connection between the rotor body and the shock-absorbing structure 3 due to the lack of effective connection at the two axial ends can be prevented, which reduces the shock-absorbing effect.

[0047] The first inner section 12 can be formed by stacking four first punchings with external teeth 11, and the second inner section 13 can be formed by stacking eight second punchings without teeth. The number and arrangement of the punchings in the first outer section 22 and the second outer section 23 are exactly the same as those in the first inner section 12 and the second inner section 13. Each punching is 0.5 mm, so the rotor stack thickness design follows the scheme of (6*X+2) mm (X is an integer). Under this design scheme, the midpoints of each rotating tooth are connected in sequence to form Q thread-like connecting lines. The height of each thread-like connecting line changes by 4 mm (the thickness of the eight untoothed punchings, i.e., the distance between two adjacent teeth in the axial direction) with each rotation. The circumferential angle between two adjacent teeth changes by L°, and the total angle change of each thread line 5 is L*(X+1)°. The first inner segment 12 and the second inner segment 13 form a circulation group, where X is the number of groups; in the formula, 6*X is the thickness of a circulation group, and +2 refers to the thickness of another first inner segment 12, that is, both axial ends of the rotor body of the present application have a first inner segment 12, which can make the connection between the entire rotor body and the shock-absorbing structure 3 more stable, and prevent the poor connection between the rotor body and the shock-absorbing structure 3 from reducing the shock-absorbing effect due to the lack of effective connection at the two axial ends.

[0048] The present application also discloses some embodiments, wherein the first inner section 12 is formed by stacking first punching sheets; that is, the outer periphery of the first punching sheet is provided with an outer tooth portion 11;

[0049] The present application also discloses some embodiments in which the second inner section 13 is formed by stacking second punching sheets, that is, the outer periphery of the second punching sheet is not provided with any teeth and is merely an annular structure;

[0050] The present application also discloses some embodiments in which the first outer section 22 is formed by stacking third punching sheets, that is, the inner periphery of the third punching sheet is provided with an inner tooth portion 21;

[0051] The present application also discloses some embodiments, in which the second outer section 23 is formed by stacking fourth punching sheets, that is, the inner circumference of the fourth punching sheet is not provided with any teeth, and it is only a ring structure.

[0052] The first inner section 12, the second inner section 13, the first outer section 22 and the second outer section 23 are each punched with the number of sheets, and the inner and outer rotor 2 cores are punched according to the rotor design rules;

[0053] This application also discloses some embodiments, in which the connection positions in each connection group are evenly arranged in the circumferential direction of the rotor body. Figure 2 When teeth are provided at the connection positions, the spacing angle between adjacent teeth in each group is P° = 360° / Q, where Q is the number of teeth, and they are evenly distributed. When four teeth are provided on the first inner segment 12, i.e., Q = 4, then P° = 90°. If there are Q teeth on each first inner segment 12, there are Q connection groups.

[0054] This application also discloses some embodiments in which the number of connection groups is set to at least two, and each connection group is arranged sequentially along the circumference of the rotor body; and the axial positions of each connection group correspond to each other. Within each connection group, the spiral direction of each connection position is consistent, ensuring that the inner rotor 1 and the outer rotor 2 core rotate in the same manner and the thread lines 5 have the same rotation direction, thereby preventing interference during rotation.

[0055] This application also discloses certain embodiments, wherein the central angle occupied by two circumferentially adjacent connection points in each connection group on the cross section of the rotor body is L°; the central angle occupied by two adjacent connection groups on the cross section of the rotor body is P°; P° / L°=m; where m is an integer. This facilitates installation of the inner rotor 1, the damping structure 3, and the outer rotor 2. When any tooth is installed in any groove 31 (corresponding axially, any groove 31 in the circumferential direction), the other teeth are installed in the corresponding groove 31, making installation simple and quick. The rotation angle rule, i.e., the specific value of m, is designed based on the rotor stack thickness requirements.

[0056] The central angle occupied by the two adjacent connection positions in each connection group on the cross section of the rotor body is L°; that is, the angle of change of the two adjacent connection positions in each group along the center line is L°, that is, the change of 30° along the circumferential rotation in space) follows the rule of P° / L°=m (m is an integer), so that the rotor exhibits rotational properties; (for example, the punching plate has 4 teeth, the angle of each tooth is P°=360° / 4=90°; the punching plate change angle is L°

[0057] =30°, following m=P° / L°=90° / 30°=3 (m is an integer). The rotor core returns to its original position after three rotations. During the rotation process, the number of matching positions between the rotor core and the damping rubber is increased (for example, a 30° rotation based on four teeth increases the number of matching positions between the rotor core and the damping rubber by three times compared to a non-rotating rotor), thereby enhancing the restraint strength and structural stability of the rotor core and the damping rubber.

[0058] The rotor of the present application is composed of an inner rotor 1 iron core, an outer rotor 2 iron cores, shock-absorbing rubber, and a plastic coating 6. The shock-absorbing rubber is injected between the inner and outer iron cores; the inner and outer iron cores of the rotor are rotary stamped to increase the diversity of the matching positions of the iron core and the shock-absorbing rubber, and the matching presents planar invariance; the axial direction of the rotor presents a threaded change, which increases the matching area between the rotor iron core and the shock-absorbing rubber and reduces deformation.

[0059] The present application uses toothed and non-toothed rotor core punchings to form an inner rotor core 1 and an outer rotor core 2 of varying cross-sections;

[0060] The inner rotor 1 and outer rotor 2 show regular rotational changes, and the inner and outer rotor 2 rotate in the same direction, which increases the number of contact points between the rotor core and the shock-absorbing rubber and enhances the stability of the structure.

[0061] The teeth of the inner rotor 1 and the outer rotor 2 of the present application present a threaded change, and the threaded fit strength is higher than the straight-insert fit strength, which increases the axial fit area, reduces stress, and enhances structural strength.

[0062] The present application can solve the hidden danger of debonding of the shock-absorbing rubber in the shock-absorbing rotor. By changing the rotor punching structure, the rotary thread type change of the rotor core can be realized, and the number and contact area of the contact positions between the rotor core and the shock-absorbing rubber can be increased, thereby enhancing the structural strength and safety reliability of the shock-absorbing rotor and reducing vibration and noise.

[0063] According to an embodiment of the present application, a motor is provided, including a rotor structure, which is the above-mentioned rotor structure.

[0064] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0065] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application. The above are merely preferred embodiments of the present application. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present application, and such improvements and variations shall also be considered within the scope of protection of the present application.

Claims

1. A rotor structure, characterized in that: The invention comprises a rotor body and a shock absorbing structure (3), wherein the shock absorbing structure (3) is arranged around the circumference of the rotor body; a plurality of connection groups are provided on the rotor body, wherein the connection groups include a plurality of connection positions, wherein the plurality of connection positions in each connection group are arranged in sequence in the axial direction of the rotor body, and the plurality of connection positions in each connection group are arranged in sequence in the circumferential direction of the rotor body, and the plurality of connection positions in each connection group on the rotor body are connected to the shock absorbing structure (3), so that a spiral connection is formed between the rotor body and the shock absorbing structure (3); the plurality of connection groups are arranged in a staggered manner along the circumference of the body, and, Along the axial direction of the rotor body, the plurality of connection positions in two adjacent connection groups are arranged at intervals.

2. The rotor structure according to claim 1, characterized in that: The rotor body further comprises an inner rotor (1) and an outer rotor (2), wherein the inner rotor (1) is arranged on the inner circumference side of the outer rotor (2), and the damping structure (3) is arranged between the inner rotor (1) and the outer rotor (2); The connection group includes an inner circumference connection group, the connection position includes an inner circumference connection position, a plurality of the inner circumference connection positions form the inner circumference connection group, and the inner circumference connection position is arranged on the inner circumference side of the outer rotor (2); the plurality of the inner circumference connection positions in each group of the inner circumference connection group are arranged in sequence in the axial direction of the outer rotor (2), and the plurality of the inner circumference connection positions in each group of the inner circumference connection group are arranged in sequence in the circumferential direction of the outer rotor (2), and the plurality of the inner circumference connection positions in each group of the inner circumference connection group on the outer rotor (2) are connected to the damping structure (3), so that a spiral connection is formed between the outer rotor (2) and the damping structure (3); And / or, the connection group includes a peripheral connection group, the connection position includes a peripheral connection position, a plurality of the peripheral connection positions form the peripheral connection group, and the peripheral connection positions are arranged on the peripheral side of the inner rotor (1); the plurality of the peripheral connection positions in each group of the peripheral connection groups are arranged in sequence in the axial direction of the inner rotor (1), and the plurality of the peripheral connection positions in each group of the peripheral connection groups are arranged in sequence in the circumferential direction of the inner rotor (1), and the plurality of the peripheral connection positions in each group of the peripheral connection groups on the inner rotor (1) are connected to the damping structure (3), so that a spiral connection is formed between the inner rotor (1) and the damping structure (3).

3. The rotor structure according to claim 1, characterized in that: A tooth portion is provided at the connection position of the rotor body, a groove (31) is correspondingly provided on the shock-absorbing structure (3), and the tooth portion is provided in the groove (31).

4. The rotor structure according to any one of claims 1 to 3, characterized in that: When the rotor body further comprises an inner rotor (1) and an outer rotor (2), and a tooth portion is provided at the connection position of the rotor body, the inner rotor (1) comprises a first inner section (12), and the tooth portion comprises an outer tooth portion (11); the outer tooth portion (11) is provided on the outer peripheral wall of the first inner section (12); the outer rotor (2) comprises a first outer section (22), and the first outer section (22) and the first inner section (12) correspond in axial position; the tooth portion comprises an inner tooth portion (21), and the inner tooth portion (21) is provided on the inner peripheral wall of the first outer section (22); and in the circumferential direction of the rotor body, the outer tooth portion (11) and the inner tooth portion (21) are spaced apart.

5. The rotor structure according to claim 4, characterized in that: The inner rotor (1) further comprises a second inner section (13), the second inner section (13) being a uniform annular structure, the first inner section (12) and the second inner section (13) being spaced apart in the axial direction of the rotor body; the outer rotor (2) further comprises a second outer section (23), the second outer section (23) being a uniform annular structure, the first outer section (22) and the second outer section (23) being spaced apart in the axial direction of the rotor body; the second outer section (23) and the second inner section (13) having corresponding axial positions.

6. The rotor structure according to claim 4, characterized in that: The first inner sections (12) are provided at both axial ends of the rotor body.

7. The rotor structure according to claim 5, characterized in that: The first inner section (12) is formed by stacking first punching sheets; and / or, the second inner section (13) is formed by stacking second punching sheets; and / or, the first outer section (22) is formed by stacking third punching sheets; and / or, the second outer section (23) is formed by stacking fourth punching sheets.

8. The rotor structure according to claim 1, characterized in that: The connection positions in each connection group are evenly arranged in the circumferential direction of the rotor body.

9. The rotor structure according to claim 1, characterized in that: The number of the connection groups is set to at least two, and the connection groups are arranged sequentially in the circumferential direction of the rotor body; and the positions of the connection groups in the axial direction correspond to each other.

10. The rotor structure according to claim 9, characterized in that: The central angle occupied by two circumferentially adjacent connection positions in each connection group on the cross section of the rotor body is L°; the central angle occupied by two adjacent connection groups on the cross section of the rotor body is P°; P° / L°=m; where m is an integer.

11. A motor comprising a rotor structure, characterized in that: The rotor structure is the rotor structure according to any one of claims 1 to 10.

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