Vibration damping motor rotor, motor and air conditioner

Abstract

This invention provides a vibration-damping motor rotor, a motor, and an air conditioner. The vibration-damping motor rotor includes: an inner core, comprising a core base circle and a plurality of first bosses protruding radially outward along the inner core, with a first groove formed between adjacent first bosses; a second groove formed on the bottom wall of each first groove, the second groove extending axially along the inner core but not penetrating both ends of the inner core; an outer core assembly, comprising a plurality of core segments spaced around the inner core, each core segment including a plurality of first segments, each first segment having an axially limiting boss at its radially inner end, each axially limiting boss being inserted into a second groove; and a vibration-damping structure, comprising a first vibration-damping part, the first vibration-damping part being injection-molded into a filling channel formed between the inner core and the outer core assembly. The vibration-damping structure of this invention, with its axial mechanical engagement with the inner core, effectively improves the axial strength of the rotor.

Description

Technical Field

[0001] This invention belongs to the field of motor design technology, specifically relating to a shock-absorbing motor rotor, a motor, and an air conditioner. Background Technology

[0002] To reduce motor vibration and noise, and increase motor stability, lifespan, and user comfort, vibration-damping rotors are commonly used in motors. Embedded tangential vibration-damping rotors are widely used because they reduce motor vibration and noise while ensuring the utilization rate of the magnets, thus improving motor performance. Embedded vibration-damping rotors typically add a damping structure between the inner and outer rotor cores. This structure absorbs the motor's vibration energy, thereby reducing vibration and noise. However, traditional embedded tangential vibration-damping rotors often face the problem of excessive stress on the damping structure at the intersection of the inner rotor core and the plastic-coated bosses. This can lead to significant deformation or even cracking of the damping structure, resulting in reduced vibration damping effectiveness and even increased noise. Furthermore, vibration-damping rotors are prone to delamination during operation, placing higher demands on the overall strength of the rotor.

[0003] Patent CN 216356157 U discloses a vibration-damping rotor assembly with a special shaft and inner rotor core. The vibration-damping rotor comprises a shaft, a vibration-damping structure, inner and outer rotor cores, and magnetic tiles. The shaft has an annular boss that contacts the vibration-damping structure, driving its rotation. Simultaneously, the shaft can also drive the inner rotor core to rotate the vibration-damping structure. Compared to traditional vibration-damping rotor solutions, this patented vibration-damping rotor assembly enhances the overall strength of the rotor and reduces material costs through structural design of the shaft and inner rotor core. However, it still suffers from problems such as the vibration-damping structure being prone to breakage and the overall structural strength of the rotor being relatively low.

[0004] Patent CN 112737169 A discloses a vibration-damping rotor structure, characterized by comprising: a body structure including an outer iron core, a magnet, and a support frame, wherein 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, which are spaced apart along a direction surrounding a predetermined axis; the outer wall of the inner iron core is provided with a plurality of second protrusions, which are spaced apart along a direction surrounding the predetermined axis; at least a portion of the vibration-damping element is made of an elastomeric material. Compared to traditional vibration-damping rotor designs, this patented vibration-damping rotor can reduce structural vibration and noise through the design of the outer iron core and vibration-damping structure, but it still suffers from problems such as significant magnetic leakage and axial delamination.

[0005] Patent CN110311491A discloses a low-leakage magnetic flexible rotor structure, characterized by comprising: two outer rotor cores, an inner rotor core, a plastic coating, and magnetic tiles; the inner rotor core includes a generally cylindrical main body and multiple radially protruding portions generally evenly distributed on the sides of the main body; the first and second outer rotor cores are arranged circumferentially; the first outer rotor core has a notch formed on its inner circumferential surface; the notch is adapted to mate with the radially protruding portions of the inner rotor core; the outer rotor core, inner rotor core, and magnetic tiles are injection molded into a single unit by the plastic coating, which is made of silicone rubber. Compared to traditional vibration-damping rotor solutions, this patent uses silicone rubber for the rotor's plastic coating, thereby reducing tangential vibration and noise. Simultaneously, the structural design of the inner and outer rotor cores increases the rotor's axial strength. However, it also suffers from lower tangential rotor strength and the susceptibility of the vibration-damping rubber to cracking. Summary of the Invention

[0006] Therefore, the present invention provides a shock-absorbing motor rotor, a motor, and an air conditioner, which can solve the technical problem of low axial strength of the shock-absorbing motor rotor in the prior art.

[0007] To address the above problems, the present invention provides a vibration-damping motor rotor, comprising:

[0008] The inner core includes a core base circle and a plurality of first protrusions that protrude radially outward along the inner core. Each first protrusion is evenly spaced around the central axis of the inner core. A first groove is formed between two adjacent first protrusions. A second groove is formed on the bottom wall of each first groove. The second groove extends along the axial direction of the inner core and does not penetrate the two ends of the axial direction of the inner core.

[0009] The outer core assembly includes multiple core segments, which are spaced apart around the inner core. Each core segment includes multiple first segments, and each first segment has an axial limiting boss at its radial inner end. Each axial limiting boss is inserted into each second groove in a corresponding manner.

[0010] The shock-absorbing structure includes a first shock-absorbing part, which is injection molded and filled into a filling channel formed between the inner iron core and the outer iron core assembly.

[0011] In some implementations...

[0012] The axial limiting boss extends circumferentially along the corresponding first segment and protrudes from both sides of the circumferential direction of the first segment; and / or

[0013] The core assembly also includes multiple second assemblies, with each second assembly and each first assembly alternately arranged in the circumferential direction of the inner core.

[0014] In some embodiments, the vibration-damping motor rotor further includes:

[0015] A plastic coating is wrapped around the radial outer periphery of the outer core assembly to connect each of the core segments and the magnetic tiles within the magnetic slots formed between adjacent core segments into a single unit; and / or,

[0016] The axial limiting boss and the side opposite to the first boss are parallel to each other.

[0017] In some implementations...

[0018] There is a first gap between the top surface of the axial limiting boss and the bottom wall of the second groove, and the first damping part has a portion that fills the first gap; and / or, the axial limiting boss is inserted into the second groove with a clearance fit, and the first damping part has a portion that fills the gap between the two.

[0019] In some implementations...

[0020] Each of the iron core segments has multiple first through holes penetrating both ends of it. The damping structure also includes a second damping part, which includes an end plate corresponding to the end of the rotor of the damping motor and a damping column passing through the first through holes.

[0021] In some implementations...

[0022] Each of the iron core segments also has a plurality of second through holes penetrating both ends therethrough, and the second through holes are located radially outside the first through holes, with a portion of the plastic coating filling the second through holes.

[0023] In some implementations...

[0024] The first through hole and the second through hole are both evenly spaced around the central axis of the inner iron core.

[0025] In some implementations...

[0026] Projected along the axial direction of the inner core, the portion between the two circumferentially adjacent groove walls in two adjacent second grooves is a second boss. Each first boss and second boss is fan-shaped, and the outer arc length of the fan-shaped ring is greater than the inner arc length. The central angle of the fan-shaped ring of the first boss is θ1, and the central angle of the fan-shaped ring of the second boss is θ2, θ1 > θ2; and / or, the chord length corresponding to the inner arc of the second boss is d1, d1 = 2π × R2 / n × (20% ~ 50%), where n is the number of first bosses in the inner core, and R2 is the radius of the arc-shaped groove bottom wall of the second groove.

[0027] In some implementations...

[0028] Projected along the axial direction of the inner core, the chord length corresponding to the outer annular arc of the first boss is d4, the radial height of the first boss is d3, and the radial height of the second boss is d2.

[0029]

[0030] In some implementations...

[0031] The inner core includes a first core segment, a second core segment, and a third core segment stacked sequentially along its axial direction. The first boss is constructed on the outer circumferential wall of the first core segment and the second core segment, the second groove is located on the second core segment, and the first core segment and the third core segment are formed by stacking multiple first laminations, while the second core segment is formed by stacking multiple second laminations.

[0032] In some implementations...

[0033] The axial height of the first core segment and / or the second core segment is d5, where 2mm≤d5≤0.1h, and h is the axial height of the inner core.

[0034] The present invention also provides an electric motor, including the above-described shock-absorbing motor rotor.

[0035] The present invention also provides an air conditioner, including the motor described above.

[0036] The present invention provides a shock-absorbing motor rotor, a motor, and an air conditioner, which have the following beneficial effects:

[0037] By further setting a second groove on the bottom wall of the first groove formed between two adjacent first protrusions, that is, on the base circle of the iron core, the axial limiting protrusion of the first split is inserted into the second groove to form a mechanical engagement between the outer iron core assembly and the inner iron core in the axial direction, thereby effectively improving the axial strength of the rotor; more importantly, in this technical solution, the second groove is constructed within the setting range of the first groove, which can prevent the size limitation that exists when it is constructed on the first protrusion, and can significantly increase the volume of the second groove, thereby ensuring the filling amount of the damping material in the second groove, improving the damping and noise reduction effect while ensuring the overall mechanical strength of the inner iron core. Attached Figure Description

[0038] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0039] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0040] Figure 1 This is a three-dimensional structural schematic diagram of the rotor of the shock-absorbing motor in an embodiment of the present invention;

[0041] Figure 2 for Figure 1 A schematic diagram of the exploded structure of the rotor of the vibration damping motor;

[0042] Figure 3 for Figure 2 A three-dimensional structural diagram of the inner iron core;

[0043] Figure 4 for Figure 3 Schematic diagram of the laminations of the first and third core sections;

[0044] Figure 5 for Figure 2 A three-dimensional structural diagram of the outer iron core in its assembled state;

[0045] Figure 6 for Figure 5 Top view in the middle;

[0046] Figure 7 for Figure 2 Cross-sectional view of the damping structure in the middle;

[0047] Figure 8 for Figure 1 A cross-sectional view of the rotor of the vibration-damping motor in the image;

[0048] Figure 9 for Figure 8 Cross-sectional view of AA in the middle;

[0049] Figure 10 for Figure 8 Cross-sectional view of BB in the middle;

[0050] Figure 11 for Figure 10 A magnified view of a portion of point A in the middle.

[0051] The reference numerals in the attached figures are as follows:

[0052] 1. Inner core; 101. First core segment; 102. Second core segment; 103. Third core segment; 11. First boss; 12. First groove; 13. Second groove; 2. Outer core assembly; 21. Core split; 211. First split; 2111. Axial limiting boss; 212. Second split; 22. Magnet; 23. First through hole; 24. Second through hole; 25. Radial outer end limiting protrusion; 3. Plastic coating; 4. Vibration damping structure; 40. First damping part; 41. End plate; 42. Vibration damping column; 43. Glue filling hole. Detailed Implementation

[0053] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0054] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0055] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0056] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0057] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0058] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0059] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0060] See also Figures 1 to 11 As shown, according to an embodiment of the present invention, a vibration damping motor rotor is provided, comprising:

[0061] The inner core 1 includes a core base circle and a plurality of first protrusions 11 that protrude radially outward along the inner core 1. Each first protrusion 11 is evenly spaced around the central axis of the inner core 1. A first groove 12 is formed between two adjacent first protrusions 11. A second groove 13 is formed on the bottom wall of each first groove 12. The second groove 13 extends along the axial direction of the inner core 1 and does not penetrate the two ends of the axial direction of the inner core 1. That is, the second groove 13 is formed on the outer circumferential wall of the core base circle. In a preferred embodiment, a plurality of the aforementioned second grooves 13 can be present in the same first groove 12 at the same time. The plurality of second grooves 13 are spaced apart along the axial direction of the inner core 1.

[0062] The outer core assembly 2 includes multiple core segments 21, which are spaced apart around the inner core 1. Each core segment 21 includes multiple first segments 211, and each first segment 211 has an axial limiting boss 2111 at its radial inner end. Each axial limiting boss 2111 is inserted into each second groove 13 in a corresponding manner. It is understood that when the axial height of the first segment is greater than the axial height of the second groove, the axial height of the axial limiting boss should not be greater than the axial height of the second groove to prevent mechanical interference during assembly.

[0063] The shock-absorbing structure 4 includes a first shock-absorbing part 40, which is injection molded into the filling channel formed between the inner iron core 1 and the outer iron core assembly 2. It can typically be formed by injection molding rubber.

[0064] In this technical solution, a second groove 13 is further provided on the bottom wall of the first groove 12 formed between two adjacent first protrusions 11, that is, on the base circle of the iron core. The axial limiting protrusion 2111 of the first split 211 is inserted into the second groove 13 to form a mechanical engagement between the outer iron core assembly 2 and the inner iron core 1 in the axial direction, thereby effectively improving the axial strength of the rotor. More importantly, in this technical solution, the second groove 13 is constructed within the setting range of the first groove 12, which can prevent the size limitation that exists when it is constructed on the first protrusion 11. It can significantly increase the volume of the second groove 13, thereby ensuring the filling amount of the damping material in the second groove 13, improving the damping and noise reduction effect while ensuring the overall mechanical strength of the inner iron core 1.

[0065] In some embodiments, the axial limiting boss 2111 extends circumferentially along the corresponding first split 211 and protrudes from both sides of the first split 211, thereby enabling reliable axial limiting of both the outer core and the inner core, as well as reliable radial limiting of the inner end of the magnetic tile 22 in the outer core assembly 2, simplifying the design of the core structure.

[0066] See details Figure 5 and Figure 6 As shown, the core component 21 also includes multiple second components 212. Each second component 212 and each first component 211 are alternately arranged in the circumferential direction of the inner core 1. Both the first component 211 and the second component 212 are provided with radially outer end limiting protrusions 25 for limiting the radially outer end of the magnetic tile 22. It is worth emphasizing that the radially inner end of the aforementioned second component 212 is not provided with a corresponding limiting structure for the radially inner end of the magnetic tile 22. This increases the distance between the two components at the radially inner end position, reduces the leakage flux of the motor, and increases the power density of the motor.

[0067] In some embodiments, the shock-absorbing motor rotor further includes: a plastic sheath 3, wrapped around the radial outer periphery of the outer core assembly 2, to connect each of the core segments 21 and the magnetic tiles 22 within the magnetic slots formed between adjacent core segments 21 into a whole. See details [link to specific embodiments]. Figure 8 As shown, the aforementioned radial outer perimeter refers to the radial outer end face of the magnetic tile 22 and the annular area near the outer perimeter of the iron core on both axial end faces. It is usually made of hard plastic to wrap around the outer iron core assembly 2, ensuring the overall reliability of the outer iron core assembly 2.

[0068] In this technical solution, the magnetic tile 22 and each iron core component 21 are wrapped together in a circumferential direction by the plastic wrapping 3 to form a whole. The filling channel between the outer iron core assembly 2 and the inner iron core 1 is filled with the first damping part 40 by injection molding without the plastic wrapping 3 or other structures. Under the premise that the outer diameter of the motor rotor remains unchanged, the protrusion height of the first boss 11 can be increased, so that the lever arm of the rotor is longer and the stress is smaller when the rotor is subjected to torque. This reduces the maximum stress and deformation of the damping structure 4 and the iron core, avoids the problem of cracking and delamination of the damping structure 4 due to excessive stress or deformation, and improves the stability of the rotor during operation. At the same time, the injection molding filling amount of the first damping part 40 can also be increased. The filling of more damping material can further reduce the vibration and noise of the motor.

[0069] The axial limiting boss 2111 and the side opposite to the first boss 11 are parallel to each other. In this technical solution, the parallel arrangement of the opposite sides of the two bosses can increase the force-bearing area of ​​the bosses under load and reduce stress concentration.

[0070] In some implementations...

[0071] The top surface of the axial limiting boss 2111 (i.e., the side facing the bottom wall of the second groove 13) has a first gap with the bottom wall of the second groove 13. The first damping part 40 has a portion that fills the first gap, and the radial thickness of this portion is preferably not less than 0.5 mm. This forms a rigid engagement between the outer iron core and the inner iron core 1 in the axial direction, achieving reliable axial limiting and also having a high radial buffering effect. This ensures that the radial electromagnetic force waves generated by the air gap and transmitted from the outer rotor iron core to the inner rotor iron core can be fully buffered and absorbed, achieving vibration reduction and noise reduction effects. In another preferred embodiment, the axial limiting boss 2111 is inserted into the second groove 13 with a clearance fit, and the first damping part 40 has a portion that fills the gap between the two, i.e., see Figure 8 As shown, the upper, lower, front, rear and left sides of each axial limiting boss 2111 are filled with corresponding damping material, thus forming a damping and buffering connection between the outer iron core and the inner iron core 1, resulting in better damping and noise reduction.

[0072] In some embodiments, each of the core segments 21 has a plurality of first through holes 23 extending through both ends thereto. Specifically, the first segment 211 and the second segment 212 are each provided with the aforementioned first through holes 23. The damping structure 4 also includes a second damping part, which includes an end plate 41 corresponding to the end of the rotor of the damping motor and a damping column 42 passing through the first through holes 23.

[0073] In this technical solution, the end plates 41 at both ends of the rotor are connected into a whole by the shock-absorbing column 42 that runs through both ends of the rotor. At the same time, the two ends of the first shock-absorbing part 40 are also connected to the two end plates 41 mentioned above, so that the shock-absorbing structure 4 forms an organic shock-absorbing whole similar to a rat cage. This effectively increases the radial inner end wrapping connection strength of the shock-absorbing structure 4 to the inner and outer iron core components and the magnetic tile 22, and solves the problem of easy delamination of the shock-absorbing rotor.

[0074] In some embodiments, each of the core segments 21 also has a plurality of second through holes 24 extending through both ends thereto, and the second through holes 24 are located radially outside the first through holes 23, with a portion of the plastic coating 3 filling the second through holes 24.

[0075] In the technical solution, by filling part of the plastic coating 3 into the second through hole 24, the wrapping connection of the plastic coating 3 to the outer iron core assembly 2 is made more reliable. It should be noted that there are multiple glue-filling holes 43 at the end of the shock-absorbing structure 4, which are located between the inner iron core 1 and the outer iron core (i.e., the aforementioned filling channel position), for filling with shock-absorbing glue to improve the rotor's vibration and noise reduction and overall connection strength. The inner and outer iron cores are integrated into a whole through the two end faces of the shock-absorbing structure 4, increasing the axial strength of the shock-absorbing structure 4. The first shock-absorbing part 40 reduces the rotor's vibration and noise by absorbing the kinetic energy in the tangential direction of the rotor.

[0076] In some embodiments, the first through hole 23 and the second through hole 24 are evenly spaced around the central axis of the inner iron core 1 to further improve the dynamic balance of the rotor mass.

[0077] In some implementation methods, see details. Figure 11 As shown, along the axial projection of the inner core 1, the portion between the two circumferentially adjacent groove walls in two adjacent second grooves 13 is the second boss (not labeled in the figure). Each first boss 11 and second boss is fan-shaped, and the outer arc length of the fan-shaped ring is greater than the inner arc length. In this case, the first boss 11 is objectively located outside the outer arc surface of the second boss. The central angle of the fan-shaped ring of the first boss 11 is θ1, and the central angle of the fan-shaped ring of the second boss is θ2. θ1 > θ2, which ensures that the circumferential width of the second boss is not too small, thereby ensuring the tangential load bearing capacity of the inner core 1.

[0078] In a preferred embodiment, the chord length corresponding to the inner annular arc of the second boss is d1, d1 = 2π × R2 / n × (20% ~ 50%), where n is the number of the first bosses 11 in the inner core 1, and R2 is the radius of the arc-shaped groove bottom wall of the second groove 13.

[0079] In some embodiments, projected along the axial direction of the inner core 1, the chord length corresponding to the outer annular arc of the first boss 11 is d4, the radial height of the first boss 11 is d3, and the radial height of the second boss is d2.

[0080] It can ensure the mechanical strength of the first boss 11 and improve its ability to withstand the radial and tangential electromagnetic forces of the motor.

[0081] To ensure the reliability of the inner core 1 and the corresponding rotor shaft assembly, the sleeve thickness of the inner core 1 and the rotor shaft assembly should be greater than 2mm. The aforementioned sleeve is also the circular wall of the arc-shaped groove bottom wall of the aforementioned second groove 13. For example, if the inner diameter of the through hole of the sleeve is R1, then R2-R1>2mm.

[0082] In some embodiments, the inner core 1 includes a first core segment 101, a second core segment 102, and a third core segment 103 stacked sequentially along its axial direction. The first boss 11 is formed on the outer circumferential wall of the first core segment 101 and the second core segment 102, and the second groove 13 is located on the second core segment 102. The first core segment 101 and the third core segment 103 are formed by stacking multiple first laminations, and the second core segment 102 is formed by stacking multiple second laminations. By stacking different laminations to form corresponding core segments and then assembling them again to form the inner core 1 of this application, manufacturing is simple.

[0083] To ensure the stability of the axial limit and the vibration reduction and noise reduction performance of the rotor, the axial height of the first iron core section 101 and / or the second iron core section 102 is d5, 2mm≤d5≤0.1h, where h is the axial height of the inner iron core 1.

[0084] See details Figure 9 and Figure 10 As shown, a magnetic groove is formed between two adjacent iron core segments 21, and each of the magnetic tiles 22 is disposed in the magnetic groove, thereby making the shock-absorbing motor rotor of the present invention an embedded tangential shock-absorbing rotor.

[0085] The material of the aforementioned shock-absorbing structure 4 can be one of EPDM, silicone rubber, or neoprene rubber; the plastic coating 3 can be PBT or PA66 material, with an appropriate amount of glass fiber added to the material to increase strength.

[0086] According to an embodiment of the present invention, an electric motor is also provided, including the above-described shock-absorbing motor rotor.

[0087] According to an embodiment of the present invention, an air conditioner is also provided, including the motor described above.

[0088] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A vibration-damping motor rotor, characterized in that, include: The inner core (1) includes a core base circle and a plurality of first protrusions (11) that protrude radially outward along the inner core (1). Each first protrusion (11) is evenly spaced around the central axis of the inner core (1). A first groove (12) is formed between two adjacent first protrusions (11). A second groove (13) is formed on the bottom wall of each first groove (12). The second groove (13) extends along the axial direction of the inner core (1) and does not penetrate the two axial ends of the inner core (1). The outer core assembly (2) includes multiple core segments (21), which are arranged at intervals around the inner core (1). A magnetic groove is formed between two adjacent core segments (21), and each magnetic tile (22) is disposed in each magnetic groove. The core segment (21) includes multiple first segments (211), and each first segment (211) has an axial limiting boss (2111) at its radial inner end. Each axial limiting boss (2111) is inserted into each second groove (13) in a corresponding manner. The axial limiting boss (2111) extends along the circumference of the corresponding first segment (211) and protrudes from both sides of the circumference of the first segment (211). The shock-absorbing structure (4) includes a first shock-absorbing part (40), which is injection molded into the filling channel formed between the inner iron core (1) and the outer iron core assembly (2).

2. The vibration-damping motor rotor according to claim 1, characterized in that, The core component (21) also includes a plurality of second components (212), and each second component (212) and each first component (211) are alternately arranged in the circumferential direction of the inner core (1).

3. The vibration-damping motor rotor according to claim 1, characterized in that, Also includes: Plastic wrapping (3) is applied to the radial outer periphery of the outer core assembly (2) to connect each core component (21) and the magnetic tiles (22) within the magnetic slots formed between adjacent core components (21) into a single unit; and / or, The axial limiting boss (2111) is parallel to the side opposite to the first boss (11).

4. The vibration-damping motor rotor according to claim 3, characterized in that, The top surface of the axial limiting boss (2111) has a first gap with the bottom wall of the second groove (13), and the first damping part (40) has a portion that fills the first gap; and / or, the axial limiting boss (2111) is fitted into the second groove (13) with a clearance fit, and the first damping part (40) has a portion that fills the gap between the two.

5. The vibration-damping motor rotor according to claim 4, characterized in that, Each of the iron core segments (21) has a plurality of first through holes (23) penetrating both ends thereon. The damping structure (4) also includes a second damping part, which includes an end plate (41) corresponding to the end of the rotor of the damping motor and a damping column (42) passing through the first through hole (23).

6. The vibration-damping motor rotor according to claim 5, characterized in that, Each of the core components (21) also has a plurality of second through holes (24) penetrating both ends therethrough, and the second through holes (24) are located radially outside the first through hole (23), and part of the plastic coating (3) is filled in the second through hole (24).

7. The vibration-damping motor rotor according to claim 6, characterized in that, The first through hole (23) and the second through hole (24) are both evenly spaced around the central axis of the inner iron core (1).

8. The vibration-damping motor rotor according to claim 1, characterized in that, Projected along the axial direction of the inner core (1), the portion between the two circumferentially adjacent groove walls in two adjacent second grooves (13) is a second boss. Each first boss (11) and second boss is fan-shaped, and the outer arc length of the fan-shaped ring is greater than the inner arc length. The central angle of the fan-shaped ring of the first boss (11) is θ1, and the central angle of the fan-shaped ring of the second boss is θ2, where θ1 > θ2; and / or, the chord length corresponding to the inner arc of the second boss is d1. , where n is the number of the first bosses (11) in the inner core (1) and R2 is the radius of the arc-shaped groove bottom wall of the second groove (13).

9. The vibration-damping motor rotor according to claim 8, characterized in that, Projected along the axial direction of the inner core (1), the chord length corresponding to the outer annular arc of the first boss (11) is d4, the radial height of the first boss (11) is d3, and the radial height of the second boss is d2. 。 10. The vibration-damping motor rotor according to claim 1, characterized in that, The inner core (1) includes a first core segment (101), a second core segment (102) and a third core segment (103) stacked sequentially along its axial direction. The first boss (11) is constructed on the outer circumferential wall of the first core segment (101) and the second core segment (102). The second groove (13) is located on the second core segment (102). The first core segment (101) and the third core segment (103) are formed by stacking multiple first laminations, and the second core segment (102) is formed by stacking multiple second laminations.

11. The vibration-damping motor rotor according to claim 10, characterized in that, The axial height of the first core segment (101) and / or the second core segment (102) is d5. , where h is the axial height of the inner iron core (1).

12. An electric motor, characterized in that, Includes the shock-absorbing motor rotor according to any one of claims 1 to 11.

13. An air conditioner, characterized in that, Includes the motor as described in claim 12.

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