Outer rotor motor, fan component and air conditioner

Abstract

The utility model discloses an external rotor motor, a fan component and an air conditioner, the external rotor motor comprises a stator assembly, a rotor assembly and a limiting component, the stator assembly comprises a stator, and the stator is provided with a central hole; the rotor assembly comprises a rotor and a rotating shaft, the rotor rotatably covers the outer side of the stator, the rotating shaft is connected with the rotor and penetrates through the center hole, and the rotating shaft and the stator are rotatably matched through a bearing which is matched in the center hole and sleeves the rotating shaft; the limiting part is arranged on the rotating shaft and is in limiting fit with the stator assembly or the bearing in the axial direction. According to the external rotor motor provided by the embodiment of the utility model, the limiting component can be in limiting fit with the stator assembly or the bearing along the axial direction, so that the matching stability between the stator assembly and the rotor assembly can be improved, and the overall stability of the external rotor motor can be improved.

Description

Technical Field

[0001] The utility model relates to the field of air conditioners, in particular to an outer rotor motor, a fan component and an air conditioner. Background Art

[0002] As the functions of air conditioners increase, the size of air conditioner indoor units is getting larger and larger, and the space occupied is increasing, which affects the user experience. In the related art, air conditioner indoor units usually use outer rotor motors to drive the crossflow impeller to reduce the overall size of the air conditioner indoor unit. However, in some extreme working conditions, such as being bumped during transportation or being impacted by external forces during use, the coordination between the rotor and the stator in the outer rotor motor will be affected, affecting the normal operation of the air conditioner. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes an outer rotor motor, which can be matched with the stator assembly or the bearing in the axial direction by setting a limiting component, so as to improve the matching stability between the stator assembly and the rotor assembly.

[0004] According to an embodiment of the utility model, the outer rotor motor includes: a stator assembly, the stator assembly includes a stator, and the stator has a center hole; a rotor assembly, the rotor assembly includes a rotor and a rotating shaft, the rotor is rotatably covered on the outside of the stator, the rotating shaft is connected to the rotor and passes through the center hole, the rotating shaft and the stator are rotatably matched through a bearing that is matched in the center hole and sleeved on the outside of the rotating shaft; a limiting component, the limiting component is provided on the rotating shaft, and is axially limited with the stator assembly or the bearing.

[0005] According to the outer rotor motor of the embodiment of the utility model, a limiting component can be provided to cooperate with the stator assembly or the bearing in the axial direction, so as to improve the matching stability between the stator assembly and the rotor assembly, which is beneficial to improving the overall stability of the outer rotor motor.

[0006] According to some embodiments of the utility model, the outer rotor motor, the rotor includes an end cover portion arranged on one axial side of the stator, the stator assembly includes a bottom cover arranged on the other axial side of the stator, the stator includes a bearing shoulder protruding into the center hole, the bearing includes a first limit bearing arranged on a side of the bearing shoulder close to the end cover portion, and a second limit bearing arranged on a side of the bearing shoulder close to the bottom cover.

[0007] According to the outer rotor motor of some embodiments of the present utility model, the limiting component includes: a first limiting member, wherein the first limiting member is arranged between the first limiting bearing and the end cover portion.

[0008] According to the outer rotor motor of some embodiments of the present invention, the limiting component includes: a second limiting member, and the second limiting member is arranged between the second limiting bearing and the bottom cover.

[0009] According to the external rotor motor of some embodiments of the present invention, one end of the rotating shaft close to the bottom cover is located between the second limit bearing and the bottom cover, and the bottom cover includes a stop portion arranged corresponding to the rotating shaft, and the end of the rotating shaft can stop the stop portion to limit the first extreme position of the rotating shaft.

[0010] According to the outer rotor motor of some embodiments of the present invention, the rotating shaft passes through the bottom cover, and the second limiting member can stop against the bottom cover to limit the first extreme position of the rotating shaft.

[0011] According to some embodiments of the external rotor motor of the present invention, the rotating shaft passes through the bottom cover, and the limiting component also includes: a third limiting member, the third limiting member is arranged between the second limiting member and the bottom cover, and the third limiting member can stop against the bottom cover to limit the first extreme position of the rotating shaft.

[0012] According to some embodiments of the external rotor motor of the present invention, the stator assembly includes a bearing sleeve, and the bearing sleeve includes a protrusion, which protrudes toward the end cover portion relative to an end surface of the stator close to the end cover portion, and the protrusion can stop the end cover portion to limit the first extreme position of the rotating shaft.

[0013] According to the outer rotor motor of some embodiments of the present invention, a first buffer is provided between the first limit bearing and the bearing shoulder, and the first buffer is configured to have a compression margin when the rotating shaft reaches the first limit position.

[0014] According to the outer rotor motor of some embodiments of the present invention, a recessed groove is formed on one side of the bottom cover close to the stator at a position corresponding to the central hole.

[0015] According to some embodiments of the utility model, the outer rotor motor, the limiting component includes: a fourth limiting member, the rotating shaft passes through the bottom cover, the fourth limiting member is arranged on the side of the bottom cover away from the second limiting bearing, and the fourth limiting member can stop the bottom cover to limit the second limit position of the rotating shaft.

[0016] According to the outer rotor motor of some embodiments of the present invention, a second buffer is provided between the second limit bearing and the bearing shoulder, and the second buffer is constructed to have a compression margin when the rotating shaft reaches the second limit position.

[0017] According to some embodiments of the outer rotor motor of the present invention, at least one bearing includes an inner ring, an outer ring and balls arranged between the inner ring and the outer ring, the outer ring cooperates with the hole wall of the center hole, and the inner ring cooperates with the rotating shaft.

[0018] According to the outer rotor motor of some embodiments of the present invention, the limiting component includes a detachable limiting piece detachably mounted on the rotating shaft, and / or an integrated limiting structure integrally formed on the rotating shaft.

[0019] The utility model also provides a fan component.

[0020] A fan component according to an embodiment of the utility model comprises a crossflow impeller and an outer rotor motor according to any one of the above embodiments, wherein the outer rotor motor is connected to one axial end of the crossflow impeller.

[0021] The utility model further provides an air conditioner.

[0022] An air conditioner according to an embodiment of the utility model includes a fan component according to any of the above embodiments.

[0023] The fan component, the air conditioner and the outer rotor motor have the same advantages as those of the prior art, and the present application will not elaborate on them here.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of an outer rotor motor according to an embodiment of the utility model;

[0026] Figure 2 is a schematic diagram of an outer rotor motor according to another embodiment of the utility model;

[0027] Figure 3 is a schematic diagram of an outer rotor motor according to another embodiment of the utility model;

[0028] Figure 4 is a schematic diagram of an outer rotor motor according to another embodiment of the utility model;

[0029] Figure 5 It is a schematic diagram of a fan component according to an embodiment of the utility model.

[0030] Reference numerals:

[0031] Fan parts 1000,

[0032] Outer rotor motor 100, crossflow impeller 200, support base 300,

[0033] Stator assembly 1, stator 11, center hole 111, bearing shoulder 112, bottom cover 12, sink 121, avoidance hole 122, bearing sleeve 13, protrusion 131,

[0034] Rotor assembly 2, rotor 21, annular portion 211, end cover portion 212, rotating shaft 22,

[0035] Bearing 3, first limit bearing 31, second limit bearing 32,

[0036] The limiting component 4 includes a first limiting component 41, a second limiting component 42, a third limiting component 43, and a fourth limiting component 44.

[0037] A first buffer member 5 and a second buffer member 6. DETAILED DESCRIPTION

[0038] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0039] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0040] Hereinafter, an outer rotor motor 100 according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0041] like Figure 1-Figure 5As shown, the outer rotor motor 100 according to the embodiment of the utility model includes: a stator assembly 1, a rotor assembly 2 and a limiting component 4, the stator assembly 1 includes a stator 11, and the stator 11 has a center hole 111; the rotor assembly 2 includes a rotor 21 and a rotating shaft 22, the rotor 21 is rotatably covered on the outside of the stator 11, the rotating shaft 22 is connected to the rotor 21 and penetrates the center hole 111, and the rotating shaft 22 and the stator 11 are rotatably matched through a bearing 3 that is matched in the center hole 111 and sleeved on the outside of the rotating shaft 22; the limiting component 4 is provided on the rotating shaft 22, and is axially limited with the stator assembly 1 or the bearing 3.

[0042] Therefore, by providing the limiting component 4 to be able to limit the bearing 3 along the axial direction, or by providing the limiting component 4 to be able to limit the stator assembly 1 along the axial direction, the matching stability between the stator assembly 1 and the rotor assembly 2 can be improved.

[0043] First, if Figure 1 As shown, the outer rotor motor 100 includes a stator assembly 1 and a rotor assembly 2. The stator assembly 1 includes a stator 11. The stator 11 is cylindrical and is provided with a center hole 111 that penetrates in the axial direction. The rotor assembly 2 includes a rotor 21 and a rotating shaft 22. The rotor 21 is sleeved on the outer side of the stator 11 at intervals and is rotatable relative to the stator 11. The rotating shaft 22 is connected to the rotor 21. One end of the rotating shaft 22 protrudes from the side of the rotor 21 facing the stator 11 and is penetrated in the center hole 111. A bearing 3, such as a deep groove ball bearing, is sleeved on the rotating shaft 22. The outer side of the bearing 3 is used to cooperate with the inner wall of the center hole 111 so that the rotating shaft 22 and the stator 11 can be rotatably matched.

[0044] The outer rotor motor 100 further includes a limiting component 4, which is disposed on the outer peripheral wall of the rotating shaft 22 and protrudes outward. The limiting component 4 can be provided to cooperate with the stator assembly 1 in the axial direction to limit the amplitude of the relative movement between the small rotor assembly 2 and the stator assembly 1, which is conducive to reducing or eliminating the impact on the bearing 3 and improving the matching stability between the stator assembly 1 and the rotor assembly 2; or, the limiting component 4 can be provided to cooperate with the bearing 3 in the axial direction to prevent the bearing 3 from sliding relative to the rotating shaft 22 or detaching from the rotating shaft 22, thereby improving the matching stability between the stator assembly 1 and the rotor assembly 2. Thus, the reliability of the outer rotor motor 100 is improved.

[0045] Exemplarily, the stator 11 may include a plastic package, and the plastic package is used to insulate and separate the stator coil from the rotor 21 .

[0046] According to the outer rotor motor 100 of the embodiment of the utility model, the limiting component 4 can be provided to limit the stator assembly 1 or the bearing 3 in the axial direction, so as to improve the installation stability of the bearing 3, thereby improving the matching stability between the stator assembly 1 and the rotor assembly 2, which is beneficial to improving the overall stability of the outer rotor motor 100.

[0047] In some embodiments of the present invention, the rotor 21 includes an end cover portion 212 arranged on one axial side of the stator 11, the stator assembly 1 includes a bottom cover 12 arranged on the other axial side of the stator 11, the stator 11 includes a bearing shoulder 112 protruding into the center hole 111, and the bearing 3 includes a first limit bearing 31 arranged on a side of the bearing shoulder 112 close to the end cover portion 212, and a second limit bearing 32 arranged on a side of the bearing shoulder 112 close to the bottom cover 12.

[0048] For example, refer to Figure 1 As shown, the rotor 21 includes an end cover portion 212 and an annular portion 211. The annular portion 211 is constructed in a circular tube shape. The annular portion 211 surrounds the circumference of the stator 11 and cooperates with the stator 11. The annular portion 211 may include a permanent magnet. When interacting with the electromagnetic coil (referred to as the stator coil) of the stator 11, the rotor 21 will start to rotate. The end cover portion 212 is arranged on one side of the stator 11 along the axial direction and is connected to the annular portion 211.

[0049] The stator assembly 1 includes a bottom cover 12, which is arranged on the other side of the stator 11 along the axial direction, that is, the side of the stator 11 away from the end cover 212. The stator 11 includes a bearing shoulder 112, which is arranged in the middle of the center hole 111 along the axial direction and protrudes toward the center hole 111.

[0050] At the same time, the bearing 3 can be arranged to include a first limit bearing 31 and a second limit bearing 32. The first limit bearing 31 and the second limit bearing 32 are arranged to be spaced apart along the axial direction of the rotating shaft 22. The first limit bearing 31 is arranged on the side of the bearing shoulder 112 close to the end cover part 212, and the second limit bearing 32 is arranged on the side of the bearing shoulder 112 close to the bottom cover 12.

[0051] In a specific working process, when the rotor assembly 2 and the stator assembly 1 are approaching each other, the first limit bearing 31 can be limited and matched with the bearing shoulder 112; and / or, the limit component 4 can be limited and matched with the stator assembly 1 to avoid the rotor assembly 2 and the stator assembly 1 from being attached and damaged. When the rotor assembly 2 and the stator assembly 1 move in a direction away from each other, the second limit bearing 32 can be limited and matched with the bearing shoulder 112; and / or, the limit component 4 can be limited and matched with the stator assembly 1 to avoid the rotor assembly 2 and the stator assembly 1 from being separated. In this way, the reliability of the outer rotor motor 100 can be improved.

[0052] In some embodiments of the present invention, Figure 1 As shown, the limiting component 4 includes: a first limiting member 41, which is disposed between the first limiting bearing 31 and the end cover 212, and is used to limit the first limiting bearing 31 to prevent the first limiting bearing 31 from sliding relative to the rotating shaft 22 toward the side away from the bearing shoulder 112. In this way, the stability of the first limiting bearing 31 can be improved, which is conducive to improving the matching stability between the rotating shaft 22 and the stator 11.

[0053] In some embodiments of the present invention, Figure 1 As shown, the limiting component 4 includes: a second limiting member 42, which is disposed between the second limiting bearing 32 and the bottom cover 12, and is used to limit the second limiting bearing 32 to prevent the second limiting bearing 32 from sliding relative to the rotating shaft 22 toward the side away from the bearing shoulder 112. In this way, the stability of the second limiting bearing 32 can be improved, which is conducive to improving the matching stability between the rotating shaft 22 and the stator 11.

[0054] In some embodiments of the present invention, one end of the rotating shaft 22 close to the bottom cover 12 is located between the second limit bearing 32 and the bottom cover 12, and the bottom cover 12 includes a stop portion corresponding to the rotating shaft 22, and the end of the rotating shaft 22 can stop the stop portion to limit the first limit position of the rotating shaft 22. It should be noted that the first limit position is, for example, Figure 1 The limit position of downward movement.

[0055] For example, refer to Figure 2 As shown, the end of the rotating shaft 22 close to the bottom cover 12 passes through the second limit bearing 32 and extends to the side of the second limit bearing 32 away from the bearing shoulder 112, so that the end of the rotating shaft 22 close to the bottom cover 12 can be located between the second limit bearing 32 and the bottom cover 12. The bottom cover 12 is provided with a stop portion, which can be the bottom of the sink groove 121 described below. The stop portion is arranged opposite to the rotating shaft 22, and the end of the rotating shaft 22 can stop on the stop portion along the axial direction to cooperate with the bottom cover 12 to limit the first limit position of the rotating shaft 22.

[0056] Specifically, when the rotating shaft 22 moves to the first limit position in the direction close to the bottom cover 12, the end of the rotating shaft 22 can stop on the stop portion. At this time, a certain gap is still maintained between the first limit bearing 31 and the bearing shoulder 112, which can avoid the rigid collision between the first limit bearing 31 and the bearing shoulder 112. In this way, the first limit bearing 31 can be protected, which is conducive to improving the reliability of the outer rotor motor 100.

[0057] In some embodiments of the present invention, the rotating shaft 22 passes through the bottom cover 12 , and the second limiting member 42 can stop against the bottom cover 12 to limit the first limit position of the rotating shaft 22 .

[0058] For example, refer to Figure 1 As shown, a relief hole 122 may be provided on the bottom cover 12, the relief hole 122 is arranged opposite to the rotating shaft 22, and the rotating shaft 22 may pass through the relief hole 122 along the axial direction to penetrate the bottom cover 12. At the same time, the size of the second stopper 42 may be set to be larger than the size of the relief hole 122, so that the second stopper 42 can stop at the peripheral area of ​​the bottom cover 12 surrounding the relief hole 122 to limit the first limit position of the rotating shaft 22.

[0059] Specifically, when the rotating shaft 22 moves to the first extreme position in the direction close to the bottom cover 12, the second limit member 42 can stop on the bottom cover 12. At this time, a certain gap is still maintained between the first limit bearing 31 and the bearing shoulder 112, which can avoid the rigid collision between the first limit bearing 31 and the bearing shoulder 112.

[0060] Through the above arrangement, the first limit bearing 31 can be protected to prevent the first limit bearing 31 from being damaged, and the end of the rotating shaft 22 can be protected, thereby improving the reliability of the outer rotor motor 100.

[0061] In some embodiments of the present invention, the rotating shaft 22 passes through the bottom cover 12, and the limiting component 4 further includes: a third limiting component 43, which is arranged between the second limiting component 42 and the bottom cover 12, and the third limiting component 43 can stop against the bottom cover 12 to limit the first extreme position of the rotating shaft 22.

[0062] For example, refer to Figure 3 As shown, a avoidance hole 122 may be provided on the bottom cover 12, the avoidance hole 122 is arranged opposite to the rotating shaft 22, and the rotating shaft 22 may pass through the avoidance hole 122 along the axial direction to penetrate the bottom cover 12. At the same time, the limiting component 4 may further include: a third limiting member 43, the third limiting member 43 is connected to the rotating shaft 22 and is arranged between the second limiting member 42 and the bottom cover 12, and the third limiting member 43 is spaced apart from the second limiting member 42. The size of the third limiting member 43 is larger than the size of the avoidance hole 122, so that the third limiting member 43 can stop at the peripheral area of ​​the bottom cover 12 surrounding the avoidance hole 122 to limit the first limit position of the rotating shaft 22.

[0063] Specifically, when the rotating shaft 22 moves to the first extreme position in the direction close to the bottom cover 12, the third limit member 43 can stop on the bottom cover 12. At this time, a certain gap is still maintained between the first limit bearing 31 and the bearing shoulder 112, which can avoid the rigid collision between the first limit bearing 31 and the bearing shoulder 112.

[0064] Through the above-mentioned arrangement, the first limit bearing 31 can be protected to prevent the first limit bearing 31 from being damaged, and the impact force exerted on the second limit bearing 32 when the rotating shaft 22 and the bottom cover 12 are limited and abutted against each other can be reduced, which is beneficial to protecting the second limit bearing 32 and improving the reliability of the outer rotor motor 100.

[0065] In some embodiments of the present invention, the stator assembly 1 includes a bearing sleeve 13, the bearing sleeve 13 includes a protrusion 131, the protrusion 131 protrudes toward the end cover portion 212 relative to the end surface of the stator 11 close to the end cover portion 212, and the protrusion 131 can stop the end cover portion 212 to limit the first extreme position of the rotating shaft 22.

[0066] For example, refer to Figure 4 As shown, the stator assembly 1 includes a bearing sleeve 13, the bearing sleeve 13 and the stator 11 are integrally injection molded, the bearing sleeve 13 is suitable for defining a center hole 111, and the bearing sleeve 13 is provided with a bearing shoulder 112 protruding toward the center hole 111. The bearing sleeve 13 includes a protruding portion 131, the protruding portion 131 is protrudingly arranged in the direction of the end cover portion 212 relative to the end surface of the stator 11 close to the end cover portion 212, and the protruding portion 131 can stop against the surface of the end cover portion 212 facing the stator 11 to limit the first limit position of the rotating shaft 22.

[0067] Specifically, when the rotating shaft 22 moves to the first extreme position in the direction close to the bottom cover 12, the protrusion 131 can stop on the end cover 212. At this time, a certain gap is still maintained between the first limit bearing 31 and the bearing shoulder 112, which can avoid the rigid collision between the first limit bearing 31 and the bearing shoulder 112.

[0068] Through the above arrangement, the structural complexity of the stator assembly 1 can be reduced, and the rotating shaft 22 can be better protected, which is beneficial to improving the reliability of the outer rotor motor 100.

[0069] In some embodiments of the present invention, a first buffer 5 is provided between the first limit bearing 31 and the bearing shoulder 112, and the first buffer 5 is configured to have a compression margin when the rotating shaft 22 reaches the first limit position. That is, the first buffer 5 has not yet reached the limit compression state at this time, and has the ability to be further compressed, thereby avoiding rigid contact between the bearing shoulder 112 and the first limit bearing 31, and protecting the first limit bearing 31.

[0070] For example, refer to Figure 1 As shown, a first buffer member 5 can be provided between the first limit bearing 31 and the bearing shoulder 112. The first buffer member 5 can be a corrugated gasket or other buffer structure with the same function, and the first buffer member 5 is constructed to have a compression margin when the rotating shaft 22 reaches the first limit position.

[0071] Specifically, the distance between the first limit bearing 31 and the bearing shoulder 112 can be set to d1, the stroke required for the rotating shaft 22 to move to the first limit position can be set to d2, and the thickness of the first buffer 5 after being fully compressed can be set to d3, satisfying: d1-d3>d2, so that the first buffer 5 has a compression margin when the rotating shaft 22 reaches the first limit position.

[0072] It can be understood that by providing the first buffer member 5, the first buffer member 5 can buffer the first limit bearing 31 to reduce the impact force between the rotor assembly 2 and the stator assembly 1, and by providing the first buffer member 5 with a compression margin when the rotating shaft 22 reaches the first limit position, a rigid collision between the second limit bearing 32 and the second buffer member 6 can be avoided, which is beneficial to improving the stability of the outer rotor motor 100.

[0073] In some embodiments of the present invention, Figure 2 As shown, a sink groove 121 can be formed on one side of the bottom cover 12 close to the stator 11 at a position corresponding to the center hole 111. Through the above arrangement, the space inside the outer rotor motor 100 can be fully utilized, which is conducive to realizing the miniaturized design of the outer rotor motor 100 and improving the practicality of the outer rotor motor 100.

[0074] In some embodiments of the present invention, the limiting component 4 includes: a fourth limiting component 44, the rotating shaft 22 passes through the bottom cover 12, and the fourth limiting component 44 is arranged on a side of the bottom cover 12 away from the second limiting bearing 32, and the fourth limiting component 44 can stop the bottom cover 12 to limit the second limit position of the rotating shaft 22. It should be noted that the second limit position is, for example, Figure 1 The upper limit position of the movement.

[0075] For example, refer to Figure 3 As shown, a avoidance hole 122 may be provided on the bottom cover 12, and the avoidance hole 122 is arranged opposite to the rotating shaft 22. The rotating shaft 22 may pass through the avoidance hole 122 in the axial direction and extend to the side of the bottom cover 12 away from the second limit bearing 32. The limit component 4 includes a fourth limit member 44, which is connected to the rotating shaft 22 and is arranged on the side of the bottom cover 12 away from the second limit bearing 32. The diameter of the fourth limit member 44 is greater than the diameter of the avoidance hole 122, so that the fourth limit member 44 can stop on the bottom cover 12 to limit the second limit position of the rotating shaft 22.

[0076] Specifically, when the rotating shaft 22 moves to the second limit position in the direction away from the bottom cover 12, the fourth limit member 44 can stop against the bottom cover 12. At this time, a certain gap is still maintained between the second limit bearing 32 and the bearing shoulder 112, which can avoid the rigid collision between the second limit bearing 32 and the bearing shoulder 112. Through the above arrangement, the second limit bearing 32 can be protected to prevent the second limit bearing 32 from being damaged, thereby improving the overall reliability of the outer rotor motor 100.

[0077] In some embodiments of the present invention, a second buffer 6 is provided between the second limit bearing 32 and the bearing shoulder 112, and the second buffer 6 is configured to have a compression margin when the rotating shaft 22 reaches the second limit position. That is, the second buffer 6 has not yet reached the limit compression state at this time, and has the ability to be further compressed, thereby avoiding rigid contact between the bearing shoulder 112 and the second limit bearing 32, and protecting the second limit bearing 32.

[0078] For example, refer to Figure 3 As shown, a second buffer member 6 can be provided between the second limit bearing 32 and the bearing shoulder 112. The second buffer member 6 can be a corrugated gasket or other buffer structure with the same function, and the second buffer member 6 is constructed to have a compression margin when the rotating shaft 22 reaches the second limit position.

[0079] Specifically, the distance between the second limit bearing 32 and the bearing shoulder 112 can be set to d4, the stroke required for the rotating shaft 22 to move to the second limit position can be set to d5, and the thickness of the second buffer 6 after being fully compressed can be set to d6, satisfying: d4-d6>d5, so that the second buffer 6 can have a compression margin when the rotating shaft 22 reaches the first limit position.

[0080] It can be understood that by providing the second buffer 6, the second buffer 6 can buffer the second limit bearing 32 to reduce the impact force between the rotor assembly 2 and the stator assembly 1, and by providing the second buffer 6 with a compression margin when the rotating shaft 22 reaches the second limit position, a rigid collision between the second limit bearing 32 and the second buffer 6 can be avoided, which is beneficial to improving the stability of the outer rotor motor 100.

[0081] In some embodiments of the utility model, at least one bearing 3 may be provided including an inner ring, an outer ring and a ball disposed between the inner ring and the outer ring, the outer ring cooperates with the hole wall of the center hole 111, and the inner ring cooperates with the outer peripheral wall of the rotating shaft 22. Among them, a bearing shoulder 112 may be provided to cooperate with the outer ring limit. Through the above arrangement, the rotating shaft 22 can stably rotate relative to the stator 11, which is conducive to improving the overall performance of the outer rotor motor 100.

[0082] In some embodiments of the present invention, the limiting component 4 includes a detachable limiting piece detachably mounted on the rotating shaft 22 , and / or an integrated limiting structure integrally formed on the rotating shaft 22 .

[0083] Specifically, the limiting component 4 can be set to include a detachable limiting component, which is suitable for being detachably installed on the rotating shaft 22, and the detachable limiting component can be any one of an open retaining ring, a stepped shaft, a knurled shaft and a plastic block to reduce the difficulty of processing; or, the limiting component 4 can be set to include an integrated limiting structure, which is suitable for being integrally formed with the rotating shaft 22 to reduce the difficulty of assembly; or, the limiting component 4 can be set to include a detachable limiting component and an integrated limiting structure, which is suitable for being detachably installed on the rotating shaft 22, and the integrated limiting structure is suitable for being integrally formed with the rotating shaft 22 to meet complex working conditions.

[0084] The following is combined with Figure 1 A specific embodiment of an outer rotor motor 100 of the utility model is described as follows:

[0085] like Figure 1 As shown, the outer rotor motor 100 includes a stator assembly 1 , a rotor assembly 2 and a limiting component 4 .

[0086] The stator assembly 1 includes a stator 11, which has a center hole 111; the rotor assembly 2 includes a rotor 21 and a rotating shaft 22, the rotor 21 is rotatably covered on the outside of the stator 11, the rotating shaft 22 is connected to the rotor 21 and penetrates the center hole 111, and the rotating shaft 22 and the stator 11 are rotatably matched through a bearing 3 that is matched in the center hole 111 and sleeved on the outside of the rotating shaft 22; the limiting component 4 is provided on the rotating shaft 22, and is axially limited with the stator assembly 1 or the bearing 3.

[0087] The rotor 21 includes an end cover portion 212 arranged on one axial side of the stator 11, the stator assembly 1 includes a bottom cover 12 arranged on the other axial side of the stator 11, the stator 11 includes a bearing shoulder 112 protruding into the center hole 111, and the bearing 3 includes a first limit bearing 31 arranged on a side of the bearing shoulder 112 close to the end cover portion 212, and a second limit bearing 32 arranged on a side of the bearing shoulder 112 close to the bottom cover 12.

[0088] A first buffer member 5 is provided between the first limit bearing 31 and the bearing shoulder 112 , and a second buffer member 6 is provided between the second limit bearing 32 and the bearing shoulder 112 .

[0089] A second limit member 42 is provided between the second limit bearing 32 and the bottom cover 12, and the second limit member 42 can stop the bottom cover 12 to limit the first limit position of the rotating shaft 22. The fourth limit member is provided on the side of the bottom cover 12 away from the second limit bearing 32, and the fourth limit member 44 can stop the bottom cover 12 to limit the second limit position of the rotating shaft 22.

[0090] Among them, the distance between the first limit bearing 31 and the bearing shoulder 112 can be set to d1, and the stroke required for the rotating shaft 22 to move to the first limit position can be set to d2, and the thickness of the first buffer 5 after being fully compressed can be set to d3 (not released in the figure), satisfying: d1-d3>d2, so that the first buffer 5 has a compression margin when the rotating shaft 22 reaches the first limit position.

[0091] At the same time, the distance between the second limit bearing 32 and the bearing shoulder 112 can be set to d4, the stroke required for the rotating shaft 22 to move to the second limit position can be set to d5, and the thickness of the second buffer 6 after full compression can be set to d6 (not released in the figure), satisfying: d4-d6>d5, so that the second buffer 6 can have a compression margin when the rotating shaft 22 reaches the first limit position.

[0092] In addition, the distance between the rotor 21 and the bottom cover 12 can be set to d7, and the distance between the end cover 212 and the stator 11 can be set to d8, satisfying: d2>d7, d2>d8. In this way, the rotor assembly 2 can be prevented from colliding with the stator assembly 1 when the rotating shaft 22 reaches the first limit position.

[0093] Therefore, the outer rotor motor 100 of the present invention has at least the following advantages:

[0094] 1. By providing the limiting component 4, the limiting component 4 can be matched with the stator assembly 1 or the bearing 3 in the axial direction, so as to improve the installation stability of the bearing 3, thereby improving the matching stability between the stator assembly 1 and the rotor assembly 2, which is beneficial to improving the overall stability of the outer rotor motor 100;

[0095] 2. By designing the dimensions d1-d8, when the rotating shaft 22 moves to the first limit position or the second limit position, it can be ensured that the limiting component 4 is not completely flattened, thereby ensuring that the balls of the bearing 3 are not subjected to excessive impact force, the raceways of the inner and outer rings of the bearing 3 are not crushed, and collision between the rotor component 2 and the stator component 1 is prevented.

[0096] The utility model also provides a fan component 1000 .

[0097] like Figure 5As shown, a fan component 1000 according to an embodiment of the utility model includes a crossflow fan wheel 200 and an outer rotor motor 100 according to any of the above embodiments, the outer rotor motor 100 is connected to one axial end of the crossflow fan wheel 200, the rotating shaft 22 is transmission-connected to the crossflow fan wheel 200, and the other axial end of the crossflow fan wheel 200 is rotatably supported on a support seat 300, so that the rotating shaft 22 can drive the crossflow fan wheel 200 to rotate synchronously.

[0098] It should be noted that a limiting surface may be provided on the support seat 300 , and when the rotating shaft 22 drives the crossflow impeller 200 to move in a direction away from the stator assembly 1 , the crossflow impeller 200 may be limited on the support seat 300 to limit the second extreme position of the rotating shaft 22 .

[0099] According to the fan component 1000 of the embodiment of the utility model, the limiting component 4 can be arranged to cooperate with the stator assembly 1 or the bearing 3 in the axial direction, so as to improve the installation stability of the bearing 3, so as to improve the matching stability between the stator assembly 1 and the rotor assembly 2, which is beneficial to improve the overall stability of the outer rotor motor 100 and ensure the reliability of the fan component 1000.

[0100] The utility model further provides an air conditioner.

[0101] The air conditioner according to the embodiment of the utility model comprises the fan component 1000 according to any one of the above embodiments.

[0102] According to the air conditioner of the embodiment of the utility model, the limiting component 4 can be arranged to cooperate with the stator assembly 1 or the bearing 3 in the axial direction, so as to improve the installation stability of the bearing 3, so as to improve the matching stability between the stator assembly 1 and the rotor assembly 2, which is beneficial to improve the overall stability of the outer rotor motor 100, ensure the reliability of the fan component 1000, and improve the overall performance of the air conditioner.

[0103] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0104] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0105] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0106] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0107] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0108] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An outer rotor motor, characterized in that: include: A stator assembly, the stator assembly comprising a stator, the stator having a central hole; A rotor assembly, the rotor assembly comprising a rotor and a rotating shaft, the rotor being rotatably covered on the outside of the stator, the rotating shaft being connected to the rotor and passing through the center hole, the rotating shaft and the stator being rotatably matched through a bearing matched in the center hole and sleeved on the outside of the rotating shaft; A limiting component is arranged on the rotating shaft and cooperates with the stator assembly or the bearing in an axial limiting manner.

2. The outer rotor motor according to claim 1, characterized in that: The rotor includes an end cover portion arranged on one axial side of the stator, the stator assembly includes a bottom cover arranged on the other axial side of the stator, the stator includes a bearing shoulder protruding into the center hole, the bearing includes a first limit bearing arranged on a side of the bearing shoulder close to the end cover portion, and a second limit bearing arranged on a side of the bearing shoulder close to the bottom cover.

3. The outer rotor motor according to claim 2, characterized in that: The limiting component comprises: A first limiting member is disposed between the first limiting bearing and the end cover.

4. The outer rotor motor according to claim 2, characterized in that: The limiting component comprises: A second limiting member is disposed between the second limiting bearing and the bottom cover.

5. The outer rotor motor according to claim 4, characterized in that: One end of the rotating shaft close to the bottom cover is located between the second limit bearing and the bottom cover, and the bottom cover includes a stop portion arranged corresponding to the rotating shaft, and the end of the rotating shaft can stop the stop portion to limit the first extreme position of the rotating shaft.

6. The outer rotor motor according to claim 4, characterized in that: The rotating shaft passes through the bottom cover, and the second limiting member can stop against the bottom cover to limit a first limit position of the rotating shaft.

7. The outer rotor motor according to claim 4, characterized in that: The rotating shaft passes through the bottom cover, and the limiting component further includes: A third position-limiting member is disposed between the second position-limiting member and the bottom cover, and the third position-limiting member can stop against the bottom cover to limit a first limit position of the rotating shaft.

8. The outer rotor motor according to claim 5, characterized in that: The stator assembly includes a bearing sleeve, and the bearing sleeve includes a protrusion, which protrudes toward the end cover relative to an end surface of the stator close to the end cover, and the protrusion can stop the end cover to limit the first extreme position of the rotating shaft.

9. The outer rotor motor according to any one of claims 5 to 8, characterized in that: A first buffer is provided between the first limit bearing and the bearing shoulder, and the first buffer is configured to have a compression margin when the rotating shaft reaches the first limit position.

10. The outer rotor motor according to claim 2, characterized in that: A recessed groove is formed on one side of the bottom cover close to the stator at a position corresponding to the central hole.

11. The outer rotor motor according to claim 2, characterized in that: The limiting component comprises: A fourth limiting member, wherein the rotating shaft passes through the bottom cover, and the fourth limiting member is arranged on a side of the bottom cover away from the second limiting bearing, and the fourth limiting member can stop against the bottom cover to limit the second limit position of the rotating shaft.

12. The outer rotor motor according to claim 11, characterized in that: A second buffer is provided between the second limit bearing and the bearing shoulder, and the second buffer is configured to have a compression margin when the rotating shaft reaches the second limit position.

13. The outer rotor motor according to claim 1, characterized in that: At least one of the bearings comprises an inner ring, an outer ring and balls arranged between the inner ring and the outer ring, the outer ring cooperates with the hole wall of the center hole, and the inner ring cooperates with the rotating shaft.

14. The outer rotor motor according to claim 1, characterized in that: The limiting component includes a detachable limiting piece detachably mounted on the rotating shaft, and / or an integrated limiting structure integrally formed on the rotating shaft.

15. A fan component, characterized in that: It comprises a crossflow wind wheel and an outer rotor motor according to any one of claims 1 to 14, wherein the outer rotor motor is connected to one axial end of the crossflow wind wheel.

16. An air conditioner, characterized in that: Comprising the fan component according to claim 15.

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