Motor rotor structure and motor

Abstract

The present invention provides a motor rotor structure and a motor, the motor rotor structure comprising: a main body structure, the main body structure comprising an outer iron core, a magnet and a support frame, the outer iron core and the magnet are both mounted on the support frame; the support frame has a through hole; the inner wall of the through hole is provided with a plurality of first protrusions, and the plurality of first protrusions are arranged at intervals along the direction surrounding the predetermined axis; an inner iron core, used to connect with a rotating shaft; the inner iron core is installed in the through hole, the outer side wall of the inner iron core is provided with a plurality of second protrusions, and the plurality of second protrusions are arranged at intervals along the direction surrounding the predetermined axis; a shock absorber, the shock absorber is formed by solidifying the glue injected into the gap between the support frame and the inner iron core; at least part of the shock absorber is made of an elastomeric material. The motor rotor structure of the present invention solves the problem of low structural strength of the motor rotor structure in the related art.

Description

Technical Field

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

[0002] When a permanent magnet synchronous motor is used, it is easy to cause motor vibration due to torque pulsation. In the related art, a motor is provided with a shock-absorbing rubber between the inner iron core and the outer iron core of the rotor structure to reduce the torque pulsation output vibration, thereby reducing the noise of the motor.

[0003] However, in the above motor structure in the related art, it is difficult for the damping rubber to achieve a stable connection between the inner iron core and the outer iron core, resulting in a poor ability of the motor rotor structure to withstand shear stress, thus having a significant impact on the structural strength of the motor rotor. Summary of the invention

[0004] The main purpose of the present invention is to provide a motor rotor structure and a motor to solve the problem of low structural strength of the motor rotor structure in the related art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a motor rotor structure is provided, comprising: a main body structure, the main body structure comprising an outer iron core, a magnet and a support frame, the outer iron core and the magnet are both installed on the support frame; the support frame has a through hole; the inner wall of the through hole is provided with a plurality of first protrusions, and the plurality of first protrusions are arranged at intervals along a direction surrounding a predetermined axis; an inner iron core, used to connect with a rotating shaft; the inner iron core is installed in the through hole, the outer side wall of the inner iron core is provided with a plurality of second protrusions, and the plurality of second protrusions are arranged at intervals along a direction surrounding the predetermined axis; a shock absorber, the shock absorber is formed by solidifying a glue material injected into a gap between the support frame and the inner iron core; at least a part of the shock absorber is made of an elastomeric material.

[0006] Furthermore, the plurality of first protrusions and the plurality of second protrusions are staggeredly arranged along a direction surrounding a predetermined axis.

[0007] Further, the minimum distance from each first protrusion to the predetermined axis is smaller than the maximum distance from each second protrusion to the predetermined axis.

[0008] Further, the predetermined axis is arranged along a preset direction; the shock absorber comprises a first pressing portion contacting the end surface of the support frame and a second pressing portion contacting the end surface of the inner core; the thickness of the first pressing portion along the preset direction is a, and the thickness of the second pressing portion along the preset direction is b; wherein b>2a; the inner core is provided with an axial hole for cooperating with the rotating shaft, and the first pressing portion is provided with a first avoidance hole for avoiding the axial hole; the diameter of the first pressing portion is The diameter of the first avoidance hole is in,

[0009] Furthermore, the contact area between the shock absorbing member and the end surface of the main body structure is S1, and the contact area between the shock absorbing member and the end surface of the inner iron core is S2; wherein S1>2×S2.

[0010] Furthermore, the support frame is injection molded on the outer surface of the outer iron core and the magnet; a positioning groove is provided on the outer iron core, and a first positioning hole is provided on the support frame at a position corresponding to the positioning groove.

[0011] Furthermore, a second positioning hole is provided on the support frame at a position corresponding to the magnet.

[0012] Furthermore, a connecting hole is provided on the outer iron core, and a connecting column is provided on the support frame, and the connecting column cooperates with the connecting hole.

[0013] Furthermore, the thickness of the inner core along the direction where the predetermined axis is located is smaller than the thickness of the body structure along the direction where the predetermined axis is located.

[0014] Furthermore, there are multiple outer iron cores and multiple magnets, and the multiple outer iron cores and multiple magnets are staggered along the direction around the predetermined axis; each outer iron core has a first end and a second end arranged opposite to each other along the radial direction of the motor rotor structure, the first end of the outer iron core is provided with a first clamping portion, and the second end of the outer iron core is provided with a second clamping portion; the first clamping portion and the second clamping portion are both clamped with the corresponding magnets to limit the radial movement of the magnets along the motor rotor structure.

[0015] Furthermore, the maximum distance from the outer iron core to the predetermined axis is greater than the maximum distance from the magnet to the predetermined axis; the support frame includes a plurality of reinforcing parts extending along the direction of the predetermined axis, and the plurality of reinforcing parts are arranged one-to-one corresponding to the plurality of magnets; each reinforcing part is located on the side of the corresponding magnet away from the through hole.

[0016] Furthermore, the main body structure has a first end and a second end relatively arranged along the direction of the predetermined axis; a baffle is provided at the first end of the main body structure and / or the second end of the main body structure, and a second avoidance hole for avoiding the rotating shaft is provided on the baffle; the baffle is connected to the main body structure, and the baffle abuts against the shock absorber.

[0017] According to another aspect of the present invention, a motor is provided. The motor comprises a motor rotor structure and a motor stator structure arranged around the motor rotor structure. The motor rotor structure is the above-mentioned motor rotor structure.

[0018] The motor rotor structure using the technical solution of the present invention includes: a main body structure, the main body structure includes an outer iron core, a magnet and a support frame, the outer iron core and the magnet are both installed on the support frame; the support frame has a through hole; the inner wall of the through hole is provided with a plurality of first protrusions, and the plurality of first protrusions are arranged at intervals along the direction surrounding the predetermined axis; an inner iron core, used to connect with the rotating shaft; the inner iron core is installed in the through hole, and the outer wall of the inner iron core is provided with a plurality of second protrusions, and the plurality of second protrusions are arranged at intervals along the direction surrounding the predetermined axis; a shock absorber, the shock absorber is formed by solidifying the glue injected into the gap between the support frame and the inner iron core; at least part of the shock absorber is made of an elastomeric material. By adopting this structural design, the glue is injected into the gap between the support frame and the inner iron core and solidified to form a deformable shock absorber, and the shock absorber can reduce the torque output vibration of the motor rotor structure, thereby reducing the noise of the motor rotor structure when working. Since the inner wall surface of the through hole on the support frame is provided with multiple first protrusions and the outer wall of the inner iron core is provided with multiple second protrusions, after the glue is injected between the support frame and the inner iron core, the adhesion between the shock absorbing component and the support frame and the inner iron core can be effectively increased, thereby improving the ability of the motor support frame, the shock absorbing component and the inner iron core to withstand shear stress at the connection position, taking into account the shock absorbing effect of the motor rotor structure and the strength of the motor rotor structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 A schematic structural diagram of an embodiment of a motor rotor structure according to the present invention is shown;

[0021] Figure 2 A schematic cross-sectional view of an embodiment of a motor rotor structure according to the present invention is shown;

[0022] Figure 3 A schematic diagram of the structure of the motor rotor structure according to an embodiment of the present invention after the damping member is removed is shown;

[0023] Figure 4 A schematic diagram of the structure after removing the shock absorbing member and the support frame according to an embodiment of the motor rotor structure of the present invention is shown;

[0024] Figure 5 A schematic diagram showing a body structure of an embodiment of a motor rotor structure according to the present invention;

[0025] Figure 6 A schematic structural diagram showing another embodiment of a motor rotor structure according to the present invention is shown;

[0026] Figure 7A schematic cross-sectional view of a first embodiment of a motor rotor structure according to the present invention is shown;

[0027] Figure 8 A schematic cross-sectional view of a second embodiment of a motor rotor structure according to the present invention is shown;

[0028] Fig. 9 A cross-sectional structural schematic diagram of a third embodiment of a motor rotor structure according to the present invention is shown.

[0029] The above drawings include the following reference numerals:

[0030] 1. Main body structure; 11. Outer iron core; 111. Positioning groove; 112. First clamping part; 113. Second clamping part; 114. Connecting hole; 12. Magnet; 13. Support frame; 130. Through hole; 131. First protrusion; 132. First positioning hole; 133. Second positioning hole; 134. Reinforcement part; 2. Inner iron core; 21. Second protrusion; 3. Shock absorber; 31. First pressing part; 32. Second pressing part; 4. Blocking piece; 41. Connecting part. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] Please refer to Figures 1 to 9 The present invention provides a motor rotor structure, comprising: a main body structure 1, the main body structure 1 comprises an outer iron core 11, a magnet 12 and a support frame 13, the outer iron core 11 and the magnet 12 are both mounted on the support frame 13; the support frame 13 has a through hole 130; the inner wall of the through hole 130 is provided with a plurality of first protrusions 131, and the plurality of first protrusions 131 are arranged at intervals along a direction surrounding a predetermined axis; an inner iron core 2, used for connecting with a rotating shaft; the inner iron core 2 is mounted in the through hole 130, the outer side wall of the inner iron core 2 is provided with a plurality of second protrusions 21, and the plurality of second protrusions 21 are arranged at intervals along a direction surrounding a predetermined axis; a shock absorber 3, the shock absorber 3 is formed by solidifying a glue material injected into a gap between the support frame 13 and the inner iron core 2; at least a portion of the shock absorber 3 is made of an elastomeric material.

[0033] The motor rotor structure of the present invention includes: a main body structure 1, the main body structure 1 includes an outer iron core 11, a magnet 12 and a support frame 13, the outer iron core 11 and the magnet 12 are both installed on the support frame 13; the support frame 13 has a through hole 130; the inner wall of the through hole 130 is provided with a plurality of first protrusions 131, and the plurality of first protrusions 131 are arranged at intervals along a direction surrounding a predetermined axis; an inner iron core 2, used to connect with a rotating shaft; the inner iron core 2 is installed in the through hole 130, and the outer side wall of the inner iron core 2 is provided with a plurality of second protrusions 21, and the plurality of second protrusions 21 are arranged at intervals along a direction surrounding a predetermined axis; a shock absorber 3, the shock absorber 3 is formed by solidifying a glue material injected into a gap between the support frame 13 and the inner iron core 2; at least a portion of the shock absorber 3 is made of an elastomeric material. By adopting this structural design, the glue is injected into the gap between the support frame 13 and the inner core 2 and solidifies to form a deformable shock absorbing member 3. The shock absorbing member 3 can reduce the torque output vibration of the motor rotor structure, thereby reducing the noise of the motor rotor structure when it is working. Since the inner wall surface of the through hole 130 on the support frame 13 is provided with a plurality of first protrusions 131 and the outer wall of the inner core 2 is provided with a plurality of second protrusions 21, after the glue is injected between the support frame 13 and the inner core 2, the adhesion between the shock absorbing member 3 and the support frame 13 and the inner core 2 can be effectively increased, thereby improving the ability of the motor support frame 13, the shock absorbing member 3 and the inner core 2 to withstand shear stress at the connection position, taking into account the shock absorbing effect of the motor rotor structure and the strength of the motor rotor structure.

[0034] For the motor rotor structure, it can be understood that the predetermined axis coincides with the rotation axis of the motor rotor structure. That is to say, the motor rotor structure has a rotation axis (i.e., the central axis of the motor rotor structure), and the motor rotor structure rotates around the rotation axis when working, and the hole center line of the through hole 130 coincides with the rotation axis of the motor rotor structure. When the motor rotor structure is in use, the inner iron core 2 is connected to the rotating shaft, thereby driving the rotating shaft to rotate, and the axis of the rotating shaft coincides with the rotation axis of the motor rotor structure. Since the support frame 13 is provided with a first protrusion 131, and the inner iron core 2 is provided with a second protrusion 21, when the glue material is injected into the gap between the support frame 13 and the inner iron core 2, the support frame 13 and the inner iron core 2 can form an installation mode embedded in the shock absorber 3, effectively improving the connection strength between the former two and the latter, and on the basis of realizing the shock absorption function, ensuring the structural strength of the motor rotor structure. At least part of the shock absorber 3 is made of an elastomeric material, that is, the shock absorber 3 has a certain elasticity, and can play a certain buffering effect when subjected to force, thereby realizing the shock absorption effect.

[0035] The thickness of the damping member 3 at the position where the thickness is the smallest is h, and the value range of h is 0.8 mm to 1.5 mm. That is, the value range of the minimum distance between the inner core 2 and the support frame 13 is 0.8 mm to 1.5 mm, so that a good damping effect can be achieved and the noise of the motor rotor structure can be reduced when in use.

[0036] In this embodiment, the shock absorbing member 3 is made of EPDM rubber or silicone rubber.

[0037] Specifically, the plurality of first protrusions 131 and the plurality of second protrusions 21 are staggeredly arranged along a direction surrounding a predetermined axis.

[0038] That is to say, along the circumferential direction of the motor rotor structure, the first protrusions 131 and the second protrusions 21 are staggered, and there is a second protrusion 21 between any two first protrusions 131, and there is a first protrusion 131 between any two second protrusions 21. In this way, it is beneficial to further improve the connection effect between the shock absorber 3 and the support frame 13 and the inner iron core 2, and improve the strength of the motor rotor structure.

[0039] Specifically, the minimum distance from each first protrusion 131 to the predetermined axis is smaller than the maximum distance from each second protrusion 21 to the predetermined axis.

[0040] By adopting this structural design, the end of each first protrusion 131 will be inserted into the gap between two adjacent second protrusions 21, and the end of each second protrusion 21 will be inserted into the gap between two adjacent first protrusions 131; combined with the glue injection structure between the support frame 13 and the inner iron core 2, the ability of the connection position to withstand tangential stress can be effectively improved, thereby improving the stability of the motor rotor structure during operation.

[0041] Specifically, the predetermined axis is arranged along a preset direction; the shock absorber 3 includes a first pressing portion 31 in contact with the end surface of the support frame 13 and a second pressing portion 32 in contact with the end surface of the inner core 2; the thickness of the first pressing portion 31 along the preset direction is a, and the thickness of the second pressing portion 32 along the preset direction is b; wherein b>2a; the inner core 2 is provided with an axial hole for cooperating with the rotating shaft, and the first pressing portion 31 is provided with a first avoidance hole for avoiding the axial hole; the diameter of the first pressing portion 31 is The diameter of the first avoidance hole is in,

[0042] By adopting this structural design, the axial bearing capacity of the motor rotor structure can be effectively improved, and the stability of the motor rotor structure can be improved.

[0043] It should be noted that when the first pressing portion 31 is a ring structure, is the outer diameter of the annular structure. When the first pressing portion 31 is not an annular structure, is the equivalent diameter of the first pressing portion 31 (the outer diameter of the annular structure having the same cross section as the first pressing portion 31). Similarly, when the first avoidance hole is a circular hole, is the diameter of the circular hole. When the first avoidance hole is not circular, is the equivalent diameter of the first avoidance hole (the diameter of a circular hole having the same cross-sectional area as the first avoidance hole).

[0044] Specifically, the contact area between the shock absorbing member 3 and the end surface of the main body structure 1 is S1, and the contact area between the shock absorbing member 3 and the end surface of the inner iron core 2 is S2; wherein S1>2×S2.

[0045] Specifically, the support frame 13 is injection-molded on the outer surfaces of the outer core 11 and the magnet 12 ; a positioning groove 111 is provided on the outer core 11 , and a first positioning hole 132 is provided on the support frame 13 at a position corresponding to the positioning groove 111 .

[0046] By adopting this structural design, during the processing of the main body structure 1, after the outer core 11 and the magnet 12 are assembled, the first positioning portion on the injection mold can be inserted into the positioning groove 111 on the outer core 11 to position and fix the outer core 11, thereby ensuring that the relative position between the outer core 11, the magnet 12 and the injection mold is accurate, and ensuring that the support frame 13 formed after injection molding can evenly wrap the outer core 11 and the magnet 12, which facilitates the processing of the main body structure 1 and can improve the processing effect of the main body structure 1. When the injection molding is completed, due to the effect of the first positioning portion, a first positioning hole 132 that avoids the first positioning portion will be formed on the support frame 13.

[0047] In this embodiment, the support frame 13 is made of nylon, PET or PBT material.

[0048] Specifically, a second positioning hole 133 is provided on the support frame 13 at a position corresponding to the magnet 12 .

[0049] By adopting the above-mentioned structural setting, during injection molding, the second positioning part on the injection mold can be in contact with the magnet 12 to further position the magnet 12, thereby improving the positioning accuracy and positioning reliability of the magnet 12, ensuring the relative position accuracy of the outer iron core 11 and the magnet 12, and thus improving the machining accuracy of the motor rotor structure. After the injection molding is completed, due to the effect of the second positioning part, a second positioning hole 133 that avoids the second positioning part will be formed on the support frame 13.

[0050] Specifically, a connection hole 114 is provided on the outer iron core 11 , and a connection column is provided on the support frame 13 , and the connection column cooperates with the connection hole 114 .

[0051] Since a connecting hole 114 is provided on the outer core 11, when injection molding is performed on the outer core 11 and the magnet 12, the material will enter the connecting hole 114 and form a connecting column passing through the connecting hole 114 after solidification, thereby making the outer core 11 and the support frame 13 more stably connected, thereby ensuring the structural strength of the main structure 1.

[0052] Specifically, the thickness of the inner core 2 along the direction where the predetermined axis is located is smaller than the thickness of the body structure 1 along the direction where the predetermined axis is located.

[0053] By adopting this structural setting, a larger filling space can be formed at the end of the inner core 2 to inject the plastic material and form the shock absorbing member 3, thereby increasing the thickness of the shock absorbing member 3 and improving the axial bearing capacity of the motor rotor structure.

[0054] Specifically, there are multiple outer iron cores 11 and multiple magnets 12, and the multiple outer iron cores 11 and the multiple magnets 12 are staggered along the direction around the predetermined axis; each outer iron core 11 has a first end and a second end arranged opposite to each other along the radial direction of the motor rotor structure, and the first end of the outer iron core 11 is provided with a first clamping portion 112, and the second end of the outer iron core 11 is provided with a second clamping portion 113; the first clamping portion 112 and the second clamping portion 113 are both clamped with the corresponding magnets 12 to limit the radial movement of the magnets 12 along the motor rotor structure.

[0055] Specifically, the maximum distance from the outer core 11 to the predetermined axis is greater than the maximum distance from the magnet 12 to the predetermined axis; the support frame 13 includes a plurality of reinforcing portions 134 extending in the direction of the predetermined axis, and the plurality of reinforcing portions 134 are arranged one-to-one corresponding to the plurality of magnets 12; each reinforcing portion 134 is located on the side of the corresponding magnet 12 away from the through hole 130.

[0056] Specifically, the main body structure 1 has a first end and a second end that are relatively arranged along the direction of the predetermined axis; the first end of the main body structure 1 and / or the second end of the main body structure 1 is provided with a baffle 4, and the baffle 4 is provided with a second avoidance hole for avoiding the rotating shaft; the baffle 4 is connected to the main body structure 1, and the baffle 4 abuts against the shock absorber 3.

[0057] In specific implementation, the baffle 4 can be connected to the main body structure 1 in a variety of ways, such as extrusion, riveting, screw connection, etc. In this embodiment, the baffle 4 has a clamping portion 41, and the clamping portion 41 is clamped in the positioning groove 111 or the first positioning hole 132, so as to achieve the clamping fit between the baffle 4 and the main body structure 1, which facilitates the assembly or disassembly of the motor rotor structure.

[0058] In addition, the present invention further provides a motor, which includes a motor rotor structure and a motor stator structure arranged around the motor rotor structure, and the motor rotor structure is the above-mentioned motor rotor structure.

[0059] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0060] The motor rotor structure of the present invention includes: a main body structure 1, the main body structure 1 includes an outer iron core 11, a magnet 12 and a support frame 13, the outer iron core 11 and the magnet 12 are both installed on the support frame 13; the support frame 13 has a through hole 130; the inner wall of the through hole 130 is provided with a plurality of first protrusions 131, and the plurality of first protrusions 131 are arranged at intervals along a direction surrounding a predetermined axis; an inner iron core 2, used to connect with a rotating shaft; the inner iron core 2 is installed in the through hole 130, and the outer side wall of the inner iron core 2 is provided with a plurality of second protrusions 21, and the plurality of second protrusions 21 are arranged at intervals along a direction surrounding a predetermined axis; a shock absorber 3, the shock absorber 3 is formed by solidifying a glue material injected into a gap between the support frame 13 and the inner iron core 2; at least a portion of the shock absorber 3 is made of an elastomeric material. By adopting this structural design, the glue is injected into the gap between the support frame 13 and the inner core 2 and solidifies to form a deformable shock absorbing member 3. The shock absorbing member 3 can reduce the torque output vibration of the motor rotor structure, thereby reducing the noise of the motor rotor structure when it is working. Since the inner wall surface of the through hole 130 on the support frame 13 is provided with a plurality of first protrusions 131 and the outer wall of the inner core 2 is provided with a plurality of second protrusions 21, after the glue is injected between the support frame 13 and the inner core 2, the adhesion between the shock absorbing member 3 and the support frame 13 and the inner core 2 can be effectively increased, thereby improving the ability of the motor support frame 13, the shock absorbing member 3 and the inner core 2 to withstand shear stress at the connection position, taking into account the shock absorbing effect of the motor rotor structure and the strength of the motor rotor structure.

[0061] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. 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 figure. For example, if the device in the accompanying 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.

[0062] 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, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0063] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A motor rotor structure, characterized in that: include: A body structure (1), the body structure (1) comprising an outer iron core (11), a magnet (12) and a support frame (13), the outer iron core (11) and the magnet (12) both being mounted on the support frame (13); the support frame (13) having a through hole (130); a plurality of first protrusions (131) being arranged at intervals along a direction surrounding a predetermined axis; An inner iron core (2) is used to be connected to the rotating shaft; the inner iron core (2) is installed in the through hole (130), and the outer side wall of the inner iron core (2) is provided with a plurality of second protrusions (21), and the plurality of second protrusions (21) are arranged at intervals along a direction surrounding the predetermined axis; A shock absorbing member (3), wherein the shock absorbing member (3) is formed by solidifying a glue material injected into a gap between the support frame (13) and the inner iron core (2); at least a portion of the shock absorbing member (3) is made of an elastomeric material; A plurality of the first protrusions (131) and a plurality of the second protrusions (21) are staggeredly arranged along a direction surrounding the predetermined axis; a minimum distance from each of the first protrusions (131) to the predetermined axis is smaller than a maximum distance from each of the second protrusions (21) to the predetermined axis; There are a plurality of the outer iron cores (11) and the magnets (12), and the plurality of the outer iron cores (11) and the plurality of the magnets (12) are arranged alternately along a direction surrounding the predetermined axis; each of the outer iron cores (11) has a first end and a second end arranged opposite to each other along the radial direction of the motor rotor structure; the first end of the outer iron core (11) is provided with a first clamping portion (112), and the second end of the outer iron core (11) is provided with a second clamping portion (113); the first clamping portion (112) and the second clamping portion (113) are both clamped with the corresponding magnets (12) to limit the radial movement of the magnets (12) along the motor rotor structure.

2. The motor rotor structure according to claim 1, characterized in that: The predetermined axis is arranged along a preset direction; the shock absorbing member (3) comprises a first pressing portion (31) in contact with an end surface of the support frame (13) and a second pressing portion (32) in contact with an end surface of the inner iron core (2); the thickness of the first pressing portion (31) along the preset direction is a, and the thickness of the second pressing portion (32) along the preset direction is b; wherein b>2a; The inner iron core (2) is provided with an axial hole for cooperating with the rotating shaft, and the first pressing portion (31) is provided with a first avoidance hole for avoiding the axial hole; the diameter of the first pressing portion (31) is φc, and the diameter of the first avoidance hole is φd; wherein φc>1.8φd.

3. The motor rotor structure according to claim 1, characterized in that: The contact area between the shock absorbing member (3) and the end surface of the main body structure (1) is S1, and the contact area between the shock absorbing member (3) and the end surface of the inner iron core (2) is S2; wherein S1>2×S2.

4. The motor rotor structure according to claim 1, characterized in that: The support frame (13) is formed by injection molding on the outer surfaces of the outer iron core (11) and the magnet (12); A positioning groove (111) is provided on the outer iron core (11), and a first positioning hole (132) is provided on the support frame (13) at a position corresponding to the positioning groove (111).

5. The motor rotor structure according to claim 4, characterized in that: A second positioning hole (133) is provided on the support frame (13) at a position corresponding to the magnet (12).

6. The motor rotor structure according to claim 4, characterized in that: The outer iron core (11) is provided with a connection hole (114), and the support frame (13) is provided with a connection column, and the connection column cooperates with the connection hole (114).

7. The motor rotor structure according to claim 1, characterized in that: The thickness of the inner iron core (2) along the direction of the predetermined axis is smaller than the thickness of the main body structure (1) along the direction of the predetermined axis.

8. The motor rotor structure according to claim 1, characterized in that: The maximum distance between the outer iron core (11) and the predetermined axis is greater than the maximum distance between the magnet (12) and the predetermined axis; The support frame (13) comprises a plurality of reinforcing portions (134) extending in the direction of the predetermined axis, the plurality of reinforcing portions (134) being arranged in one-to-one correspondence with the plurality of magnets (12); each of the reinforcing portions (134) is located on a side of the corresponding magnet (12) away from the through hole (130).

9. The motor rotor structure according to claim 1, characterized in that: The main body structure (1) has a first end and a second end which are arranged opposite to each other along the direction of the predetermined axis; a baffle (4) is provided at the first end of the main body structure (1) and / or the second end of the main body structure (1); a second avoidance hole for avoiding the rotating shaft is provided on the baffle (4); the baffle (4) is connected to the main body structure (1), and the baffle (4) abuts against the shock absorbing component (3).

10. A motor, characterized in that: The motor comprises a motor rotor structure and a motor stator structure arranged around the motor rotor structure. The motor rotor structure is the motor rotor structure according to any one of claims 1 to 9.

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