External rotor motors and fans

Abstract

The present invention belongs to the field of motor technology, and more specifically, relates to an outer rotor motor and a fan. The outer rotor motor includes a bearing mounting seat, a stator assembly, and a rotor assembly. The rotor assembly includes a rotor and a rotating shaft. The bearing mounting seat is provided with an axial hole including a first bearing hole and a second bearing hole. The first end of the rotating shaft is passed through the axial hole. A first bearing is provided in the first bearing hole. The outer ring of the first bearing is tightly fitted with the hole wall of the first bearing hole. A second bearing is provided in the second bearing hole. The outer ring of the second bearing is loosely fitted with the hole wall of the second bearing hole. The second end of the rotating shaft extends from the second bearing hole. The rotor is mounted on the second end of the rotating shaft. In this way, the two bearings complement each other, the precision requirements for the loose fit clearance between the bearing, the rotating shaft, and the bearing mounting seat are reduced, the operating precision of the rotating shaft is improved, the difficulty of processing and manufacturing the rotating shaft, the bearing, and the bearing hole is reduced, and production efficiency and quality are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of motors, and more specifically, relates to an outer rotor motor and a fan. Background Art

[0002] During assembly, the stator core and bearing mount are connected using an interference fit. A bearing hole is then provided in the bearing mount, and a bearing is installed within the hole to connect to the shaft. The rotor assembly is then mounted to the bearing mount via the shaft. This creates a cantilever-like structure between the rotor assembly and the shaft. High-speed rotation of the rotor assembly can impact the bearing mount and the bearing hole within it, causing deformation of the bearing hole and bearing, impacting the precision and service life of the bearing and shaft.

[0003] In the prior art, the outer ring of the bearing is loosely connected to the bearing hole to reduce deformation of the bearing hole and bearing caused by the impact of the rotor assembly's rotation. However, this assembly method requires high dimensional accuracy of the shaft, bearing, and bearing hole. If the loose fit clearance is too small, it will not effectively prevent impact. If it is too large, it may cause the shaft to shake during operation, generating vibration and noise. The machining of the shaft, bearing, and bearing hole is difficult, and it is difficult to further improve production efficiency and product quality. Summary of the Invention

[0004] The main purpose of the embodiments of the present invention is to provide an outer rotor motor and a fan to solve the technical problems in the prior art that the outer rotor motor has high requirements on the dimensional accuracy of the shaft, bearings and bearing holes, and the related structure is difficult to process, resulting in difficulty in improving the motor production efficiency and quality.

[0005] The technical solution adopted by the present invention is: to provide an outer rotor motor, including a bearing mounting seat, a stator assembly and a rotor assembly, the rotor assembly including a rotor and a rotating shaft, the bearing mounting seat is provided with an axial hole, the axial hole includes a first bearing hole and a second bearing hole, the first end of the rotating shaft is passed through the axial hole, a first bearing is provided in the first bearing hole, the outer ring of the first bearing is tightly fitted with the hole wall of the first bearing hole, a second bearing is provided in the second bearing hole, the outer ring of the second bearing is loosely fitted with the hole wall of the second bearing hole, the second end of the rotating shaft extends from the second bearing hole, and the rotor is installed at the second end of the rotating shaft.

[0006] In some embodiments, the inner ring of the first bearing is loosely fitted to the rotating shaft, and the inner ring of the second bearing is tightly fitted to the rotating shaft.

[0007] In some embodiments, the aperture of the first bearing hole is greater than or equal to the aperture of the second bearing hole, and the outer diameter of the first bearing is greater than or equal to the outer diameter of the second bearing.

[0008] In some embodiments, the stator assembly includes a stator core, the stator core is provided with a first through hole for the mounting post to pass through, and the hole wall of the first through hole is bonded to the outer peripheral wall of the mounting post by an adhesive.

[0009] In some embodiments, a groove is formed on the outer peripheral wall of the mounting post, and the groove can accommodate the adhesive.

[0010] In some embodiments, the outer rotor motor further includes a circuit board, and the stator assembly further includes an insulating frame wrapped around the stator core. The insulating frame is provided with a clip, and the circuit board is provided with a slot, and the clip is clipped into the slot.

[0011] In some embodiments, the bearing mounting seat further includes a cover portion provided at one end of the mounting column, an installation gap for accommodating the circuit board is formed between the stator core and the cover portion, and the buckle is located in the installation gap.

[0012] In some embodiments, the insulating frame is provided with a second through hole for the mounting post to pass through, the circuit board is provided with a third through hole for the mounting post to pass through, the buckle is provided at the edge of the second through hole, and the card slot is provided at the edge of the third through hole.

[0013] In some embodiments, the insulating frame is further provided with a limiting boss, and an end of the limiting boss abuts against the circuit board.

[0014] In some embodiments, the bearing mounting seat further comprises an annular portion disposed around the mounting post, the annular portion being connected to the cover portion, and the rotor comprises a yoke portion disposed around the mounting post, the annular portion enclosing the yoke portion.

[0015] In some embodiments, the annular portion is provided with a wire outlet slot, the outer rotor motor also includes a power cord, one end of the power cord is connected to the circuit board, and the other end of the power cord passes through the wire outlet slot, and a limiting plate is connected to the cover and / or the annular portion, and the limiting plate has a pressing portion extending into the wire outlet slot, and the pressing portion cooperates with the wire outlet slot to limit the movement of the power cord relative to the wire outlet slot.

[0016] In some embodiments, the bearing mounting seat is further provided with a wire sleeve, and the pressing portion cooperates with the wire outlet groove to clamp one end of the wire sleeve to the wire outlet groove, and the other end of the wire sleeve passes through the wire outlet groove, and the power cord is connected to the wire sleeve.

[0017] In some embodiments, a bayonet is provided at one end of the wire sleeve, a protrusion is provided in the wire outlet groove, the protrusion and the pressing portion are respectively snapped into the bayonet, and the protrusion and the pressing portion cooperate to clamp the wire sleeve.

[0018] In some embodiments, the cover is provided with a wire outlet connected to the wire outlet groove, and the limiting plate further includes a connecting portion connected to the cover and / or the annular portion, the connecting portion covers the wire outlet, and the pressing portion is connected to the connecting portion.

[0019] The above one or more technical solutions in the outer rotor motor provided by the embodiment of the present invention have at least one of the following technical effects: in the outer rotor motor of the present invention, the outer ring of the first bearing is tightly fitted with the bearing mounting seat at the end away from the rotor, ensuring that the shaft can be reliably mounted on the shaft mounting seat to prevent the shaft from loosening; the outer ring of the second bearing is then provided at the end of the bearing mounting seat close to the rotor, which is loosely fitted with the bearing mounting seat to cushion the impact force generated by the rotation of the rotor, reduce the impact of the impact on the bearing mounting seat on the second bearing and the shaft, and thus reduce the risk of deformation of the shaft. In this way, the two bearings complement and cooperate with each other, providing an effective guarantee for the operating accuracy of the shaft, reducing the precision requirements of the loose gap between the bearing, shaft and bearing mounting seat, reducing the difficulty of processing and manufacturing the shaft, bearing and bearing hole, and improving production efficiency and quality.

[0020] Another technical solution of the present invention is to provide a fan, comprising the above-mentioned outer rotor motor.

[0021] The above one or more technical solutions in the fan provided by the embodiment of the present invention have at least one of the following technical effects: the fan of the present invention, by using the above-mentioned outer rotor motor, reduces the risk of deformation of the rotating shaft due to the impact of the rotor rotation on the bearing mounting seat, improves the operating accuracy and service life of the rotating shaft, and improves the rotation stability of the rotor. In addition, when manufacturing the outer rotor motor, the processing accuracy requirements of structures such as the rotating shaft, bearings and bearing holes are reduced, the production efficiency of the outer rotor motor is improved, and the factory quality is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A schematic cross-sectional view of an outer rotor motor according to an embodiment of the present invention;

[0024] Figure 2 for Figure 1 A schematic structural diagram of the bearing mounting seat of the outer rotor motor shown;

[0025] Figure 3 For the Figure 2 Sectional view of AA;

[0026] Figure 4 for Figure 1 A cutaway view of the rotor assembly of an outer rotor motor is shown

[0027] Figure 5for Figure 1 Schematic diagram of the assembly structure of the stator assembly and circuit board of the outer rotor motor shown;

[0028] Figure 6 for Figure 5 An exploded schematic diagram of the structure shown;

[0029] Figure 7 For the Figure 5 Sectional view of the midline BB;

[0030] Figure 8 for Figure 5 An exploded schematic diagram of the insulating frame of the stator assembly is shown;

[0031] Figure 9 for Figure 8 A schematic structural diagram of the upper frame of the insulating frame shown;

[0032] Figure 10 for Figure 7 A magnified schematic diagram of point A in the middle;

[0033] Figure 11 for Figure 1 An exploded schematic diagram of the outer rotor motor bearing mounting seat with power cables installed;

[0034] Figure 12 for Figure 2 Another perspective view of the bearing mount shown;

[0035] Figure 13 This is a cross-sectional view of the power cord when it is sleeved on the wire sleeve;

[0036] Figure 14 for Figure 11 The structural schematic diagram of the limit plate connected to the bearing mounting seat is shown.

[0037] In the figures, the main marks of the drawings are:

[0038] 10. Bearing mounting seat; 11. Mounting column; 111. Shaft hole; 1111. First bearing hole; 1112. Connecting hole; 1113. Second bearing hole; 112. First cylinder; 113. Second cylinder; 1131. Groove; 1132. Second flat position; 12. First bearing; 13. Second bearing; 14. Cover; 141. Wire outlet; 142. Mounting hole; 143. Connecting arm; 144. Screw hole; 14 5. Second positioning post; 15. Ring portion; 151. Wire outlet slot; 1511. Protrusion; 16. Installation gap; 17. Limiting plate; 171. Pressing portion; 1711. Second positioning hole; 1712. Connecting hole; 172. Connecting portion; 18. Wire sleeve; 181. Bayonet; 182. Wire sleeve hole; 19. Seal; 20. Power cord; 21. Connector; 22. Protective cover; 23. Wire; 30. Stator assembly; 31. Stator core; 311. First through hole; 312. First flattened portion; 313. Salient pole; 314. Salient pole tooth; 32. Winding coil; 33. Insulating frame; 331. Buckle; 3311. Elastic arm; 3312. Barb; 332. Second through hole; 333. Position-limiting boss; 334. First positioning post; 335. Upper frame; 3351. Upper partition; 3352. Fourth through hole; 3353. Upper cover; 3354. Upper side wall; 3355. Upper lap joint; 336. Lower frame; 3361. Lower partition; 3362. Lower cover; 3363. Lower side wall; 3364. Lower lap joint; 40. Rotor assembly; 41. Rotor; 411. Yoke; 42. Rotating shaft; 43. Magnet; 60. Circuit board; 61. Card slot; 62. Third through hole; 63. First positioning hole; 100. Fastener. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the following is a detailed description of the present invention with reference to Figures 1 to 3. Figure 14 It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0041] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship 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 device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Features specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0043] References to "one embodiment," "some embodiments," or "an embodiment" in this specification mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the present invention. The phrases "in one embodiment," "in some embodiments," "in other embodiments," "in yet other embodiments," etc., appearing in various places in this specification are not necessarily all referring to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically stated. Furthermore, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner.

[0044] In the related art, air conditioners are generally classified into several common types, such as mobile air conditioners, window air conditioners, and split air conditioners, depending on their installation method. Mobile air conditioners combine the indoor and outdoor units into one unit and can be moved according to usage needs. They generally offer advantages such as ease of installation, flexibility, and ease of use. They are typically used for emergency situations or to control the temperature in small spaces. During use, since mobile air conditioners are placed directly within the site of use, their overall size is limited. Generally, they cannot be set too large to prevent them from occupying too much space. Therefore, mobile air conditioners often use external rotor motors with relatively small structures and sizes as their power source.

[0045] However, during assembly, conventional outer rotor motors use an interference fit to connect the stator core to the bearing mount. A bearing hole is then provided in the bearing mount, and a bearing is installed in the hole to connect to the shaft. The rotor assembly is then mounted to the bearing mount via the shaft. This creates a cantilever-like structure between the rotor assembly and the shaft. High-speed rotation of the rotor assembly can impact the bearing mount and the bearing hole within it, causing deformation of the bearing hole and bearing, impacting the precision and service life of the bearing and shaft.

[0046] In the prior art, to reduce the impact of the rotor assembly's rotational impact on the shaft, bearing hole, and bearing, the outer ring of the bearing is loosely connected to the bearing hole. However, this assembly method requires high dimensional accuracy for the shaft, bearing, and bearing hole. If the loose fit clearance is too small, it will not effectively prevent impact. If it is too large, it may cause the shaft to shake during operation, generating vibration and noise, and also wear the shaft. In this case, regardless of whether the shaft and the inner ring of the bearing are tightly or loosely fitted, the machining and assembly of the shaft, bearing, and bearing hole are relatively difficult, making it difficult to further improve production efficiency and product quality.

[0047] Based on this, embodiments of the present invention provide an outer rotor motor that, by adjusting the assembly relationship between the rotating shaft, bearings, and bearing holes, can effectively reduce the impact of the rotor assembly on the bearing holes, bearings, and rotating shaft. Furthermore, the assembly precision of the related structures is reduced, and the machining difficulty of the rotating shaft, bearings, and bearing holes is reduced, thereby helping to improve the production efficiency of the motor and reduce production costs. The outer rotor motor of the present invention is described in detail below with reference to specific embodiments.

[0048] See also Figures 1 to 4 ,in, Figure 1 A schematic cross-sectional view of an outer rotor motor according to an embodiment of the present invention is provided. Figure 2 for Figure 1 The structural diagram of the bearing mounting seat of the outer rotor motor is shown in FIG. Figure 3 For the Figure 2 The AA cutaway view, Figure 4 for Figure 1 A cutaway view of the rotor assembly of an outer rotor electric machine is shown.

[0049] like Figure 1 、 Figure 3 and Figure 4As shown, the outer rotor motor of this embodiment includes a bearing mounting seat 10, a stator assembly 30 mounted on the bearing mounting seat 10, and a rotor assembly 40. The rotor assembly 40 includes a rotor 41 and a rotating shaft 42. The bearing mounting seat 10 is provided with an axial hole 111 for the rotating shaft 42 to pass through. The axial hole 111 includes a first bearing hole 1111 and a second bearing hole 1113 coaxially arranged. Specifically, the first bearing hole 1111 and the second bearing hole 1113 are spaced apart along the axial direction of the axial hole 111. The axial hole 111 also includes a connecting hole 1112 connecting the first bearing hole 1111 and the second bearing hole 1113. The first end of the rotating shaft 42 is passed through the shaft hole 111. The first bearing 12 is disposed in the first bearing hole 1111. The outer ring of the first bearing 12 is tightly fitted with the hole wall of the first bearing hole 1111. The second bearing 13 is disposed in the second bearing hole 1113. The outer ring of the second bearing 13 is loosely fitted with the hole wall of the second bearing hole 1113. The second end of the rotating shaft 42 extends from the second bearing hole 1113, and the rotor 41 is mounted on the second end of the rotating shaft 42.

[0050] That is, in this embodiment, the outer ring of the first bearing 12, which is farther from the rotor 41, is tightly fitted against the wall of the first bearing hole 1111, while the outer ring of the second bearing 13, which is closer to the rotor 41, is loosely fitted against the wall of the second bearing hole 1113. In this embodiment, a loose fit refers to a clearance fit, while a tight fit may be a transition fit or an interference fit.

[0051] In the outer rotor motor of this embodiment of the present invention, the rotating shaft 42 is rotatably connected to the bearing mounting base 10 via a first bearing 12 and a second bearing 13. The provision of two bearings supporting the rotating shaft 42 increases the support span for the rotating shaft 42, thereby improving support and rotational stability of the rotating shaft 42. Furthermore, the outer ring of the first bearing 12, located farther from the rotor 41, is tightly fitted against the wall of the first bearing hole 1111, while the outer ring of the second bearing 13, located closer to the rotor 41, is loosely fitted against the wall of the second bearing hole 1113. In this way, the outer ring of the first bearing 12 is tightly fitted with the bearing mount 10 at the end of the shaft 42 away from the rotor 41, ensuring that the shaft 42 is securely mounted on the bearing mount 10 and preventing it from loosening. However, since the end of the bearing mount 10 closer to the rotor 41 (i.e., the cantilevered end of the bearing mount 10) is more affected by the impact of the rotor 41's rotation than the end away from the rotor 41, the outer ring of the second bearing 13 is loosely fitted with the bearing mount 10. This can cushion the impact force generated by the rotation of the rotor 41, reducing the impact of the impact on the bearing mount 10 on the second bearing 13 and the shaft 42, thereby reducing the risk of deformation of the shaft 42. In this way, the two bearings complement and cooperate with each other, effectively ensuring the operating accuracy of the shaft 42. The precision requirements for the loose clearance between the bearing, shaft 42, and bearing mount 10 are reduced, reducing the difficulty in manufacturing the shaft 42, bearing, and bearing hole, and improving production efficiency and quality.

[0052] In another embodiment of the present invention, Figure 1 、 Figure 3 and Figure 4 As shown, the inner ring of the first bearing 12 is loosely fitted with the rotating shaft 42, and the inner ring of the second bearing 13 is tightly fitted with the rotating shaft 42. Thus, when assembling the outer rotor motor of this embodiment, the first bearing 12 is sleeved into the first bearing hole 1111, as shown in FIG. Figure 3 As shown, the second bearing 13 is sleeved onto the rotating shaft 42, as shown in FIG. Figure 4 As shown, the first end of the rotating shaft 42 is then inserted into the shaft hole 11. At this time, since the inner ring of the first bearing 12 is loosely fitted with the rotating shaft 42, and the outer ring of the second bearing 13 is loosely fitted with the hole wall of the second bearing hole 1113, the first end of the rotating shaft 42 can be smoothly inserted into the inner ring of the first bearing 12, and the second bearing 13 can also be smoothly inserted into the second bearing hole 1113. When the bearing 42 is inserted into the shaft hole 111, the rotating shaft 42, the bearing and the bearing hole will not be worn or squeezed and deformed, which helps to improve the operation accuracy and service life of the rotating shaft 42.

[0053] In this way, in the outer rotor motor of this embodiment, the rotating shaft 42 is tightly fitted with the bearing mounting seat 10 through the outer ring of the first bearing 12 at the end away from the rotor 41, ensuring that the rotating shaft 42 can be reliably mounted on the rotating shaft mounting seat 10 to prevent the rotating shaft from loosening. At the same time, the inner ring of the first bearing 12 is loosely fitted with the rotating shaft 42 to prevent the rotating shaft 42 from being squeezed and worn or deformed when the rotating shaft 42 is assembled with the first bearing 12; and the inner ring of the second bearing 13 is tightly fitted with the rotating shaft 42 at the end of the bearing mounting seat 10 close to the rotor 41 to ensure that the rotating shaft 42 can rotate quickly and stably relative to the bearing mounting seat 10, while the outer ring of the second bearing 13 is loosely fitted with the bearing mounting seat 10 to cushion the impact force generated by the rotation of the rotor 41, reduce the impact of the impact on the bearing mounting seat 10 on the second bearing 13 and the rotating shaft 42, and thus reduce the risk of deformation of the rotating shaft 42 and the like.

[0054] In another embodiment of the present invention, Figure 1 、 Figure 3 and Figure 4 As shown, the diameter of first bearing hole 1111 is greater than or equal to the diameter of second bearing hole 1113, and the outer diameter of first bearing 12 is greater than or equal to the outer diameter of second bearing 13. Thus, when the inner diameters of the two bearing holes are equal, first bearing 12 and second bearing 13 of the same size can be selected for connection to rotating shaft 42. When the inner diameter of first bearing hole 1111 is greater than the inner diameter of second bearing hole 1113, the outer diameter of first bearing 12 can be set to be greater than the outer diameter of second bearing 13, that is, the size of first bearing 12 is larger than the size of second bearing 13. This allows for larger-sized bearings to be less expensive, helping to reduce production costs.

[0055] In another embodiment of the present invention, Figure 1 、 Figure 2 and Figure 3 As shown, the stator assembly 30 includes a stator core 31, the bearing mounting seat 10 includes a mounting post 11, the shaft hole 111 is arranged in the mounting post 11, the stator core 31 is provided with a first through hole 311 for the mounting post 11 to pass through, the stator core 31 is sleeved outside the mounting post 11, and the hole wall of the first through hole 311 is bonded to the outer peripheral wall of the mounting post 11 by an adhesive to ensure that the stator core 31 can be reliably connected to the mounting post 11, while avoiding vibration and noise generated by the outer rotor motor during operation due to the existence of a gap.

[0056] In this way, there is a smaller gap between the stator core 31 and the mounting column 11. Compared with the interference connection or riveted connection between the stator core 31 and the mounting column 11, when the stator core 31 is assembled to the mounting column 11, the stator core 31 will not squeeze or impact the mounting column 11, causing the mounting column 11 to deform, thereby avoiding deformation of the first bearing hole 1111 and the second bearing hole 1113, thereby providing a guarantee for the precise installation of the first bearing 12, the second bearing 13 and the rotating shaft 42.

[0057] In this embodiment, if Figure 1 and Figure 3 As shown, the outer wall of the mounting post 11 is provided with a groove 1131, which is used to store excess adhesive when bonding the stator core 31 to the mounting post 11. Thus, when the stator core 31 is bonded to the mounting post 11 using glue or other adhesive, excess adhesive can flow into and be stored in the groove 1131, preventing it from flowing elsewhere and causing contamination or affecting the installation and operation of other components.

[0058] In some specific embodiments, Figure 2 、 Figure 5 and Figure 6 As shown, Figure 5 for Figure 1 The schematic diagram of the assembly structure of the stator assembly and the circuit board of the outer rotor motor is shown. Figure 6 for Figure 5 Exploded view of the structure shown.

[0059] In this embodiment, the wall of the first through hole 311 is provided with a first flattened portion 312, and the outer wall of the mounting post 11 is provided with a second flattened portion 1132 that matches the first flattened portion 312. The first flattened portion 312 and the second flattened portion 1132 are compatible, meaning that they have the same shape, dimensions, and are positioned directly opposite each other. The flattened portion provided at the contact point between the stator core 31 and the mounting post 11 not only provides the mounting post 11 with a certain torque transmission capability, but also facilitates positioning, improving the assembly efficiency of the stator core 31 and the mounting post 11.

[0060] Please continue reading Figures 1 to 3 ,as well as Figures 5 to 11 ,in, Figure 7 For the Figure 5 Sectional view of the midline BB, Figure 8 for Figure 5 An exploded schematic diagram of the insulation frame of the stator assembly is shown. Figure 9 for Figure 8 The schematic structural diagram of the upper frame of the insulating frame shown in FIG. Figure 10 for Figure 7 Enlarged schematic diagram of point A in the middle.

[0061] In another embodiment of the present invention, Figure 1 、 Figure 5 and Figure 6 As shown, the outer rotor motor further includes a circuit board 60, and the stator assembly 30 further includes an insulating frame 33 and a winding coil 32, wherein the insulating frame 33 is coated on the stator core 31. Specifically, the stator core 31 is provided with a plurality of salient poles 313, and the insulating frame 33 coats each salient pole 313. The winding coil 32 is wound on each salient pole 313 coated by the insulating frame 33, as shown in FIG. Figure 5 As shown. The circuit board 60 is electrically connected to the winding coil 32, thereby providing power to the winding coil 32. Furthermore, the insulating frame 33 is provided with a buckle 331, and the circuit board 60 is provided with a slot 61. The circuit board 60 is fastened to the insulating frame 33 through the slot 61 and the buckle 331. In this embodiment, the circuit board 60 can be an electronic control board equipped with electronic control components.

[0062] In this way, the circuit board 60 is connected to the insulating frame 33 through the card slot 61 and the card buckle 331 of the insulating frame 33. When assembling the outer rotor motor of this embodiment, the circuit board 60 can be buckled to the insulating frame 33. The installation operation of the circuit board 60 is simple, the operability is strong, and the assembly efficiency is high. Moreover, the installation of the circuit board 60 does not require the use of additional external connectors such as screws to connect it to the bearing mounting seat 10. The installation of the circuit board 60 is not restricted by the supply of connectors and can be installed anywhere and at any time, making the operation more convenient and flexible. In addition, by connecting the circuit board 60 through the buckling structure, the circuit board 60 will not become loose due to the loosening of the connector. The assembly stability of the circuit board 60 and the insulating frame 33 is higher, making the electrical performance of the outer rotor motor of this embodiment more stable.

[0063] In another embodiment of the present invention, Figure 1 、 Figure 2 and Figure 7As shown, the bearing mounting seat 10 also includes a cover portion 14 vertically arranged at one end of the mounting column 11. Specifically, the cover portion 14 is vertically connected to the end of the mounting column 11 facing away from the rotor 41 along the radial direction of the shaft hole 111. The cover portion 14 axially blocks the stator assembly 30 and provides a centralized mounting and connection area for some external structures such as external interfaces.

[0064] Furthermore, a mounting gap 16 is formed between the stator core 31 and the cover 14. The mounting gap 16 is used to accommodate the circuit board 60 and provide a winding space for the winding coil 32. Specifically, the end surface of the stator core 31 facing the cover 14 is spaced apart from the cover 14 to form the mounting gap 16. The buckle 331 on the insulating frame 33 protrudes into the mounting gap 16. Figure 1 In this way, the mounting gap 16 of the circuit board 60 inside the motor is fully utilized to set the buckle 331. The setting of the buckle 331 will not lead to an increase in the axial size of the outer rotor motor of this embodiment, which meets the demand for miniaturization of outer rotor motors.

[0065] Specifically, in this embodiment, Figures 1 to 3 As shown, the mounting post 11 includes a first barrel 112 and a second barrel 113 continuously arranged along the axial direction of the shaft hole 111. The first barrel 112 is connected to the cover 14 and has an outer diameter larger than that of the second barrel 113. The stator core 31 is sleeved on the second barrel 113, with the end surface of the stator core 31 facing the cover 14 abutting against the end surface of the first barrel 112. The circuit board 60 is sleeved on the first barrel 112. The first barrel 112 and the second barrel 113 assist in the positioning and installation of the stator core 31 and the circuit board 60. When the stator core 31 abuts against the first barrel 112, a mounting gap 16 is reserved between the stator core 31 and the cover 14 for mounting the circuit board 60.

[0066] Furthermore, in this embodiment, Figure 1 and Figure 3 As shown, the above-mentioned groove 1131 for accommodating the adhesive is arranged on the second cylinder 113 and is arranged close to the first cylinder 112. In this way, during the bonding operation, the adhesive is injected from the end face of the second cylinder 113 away from the cover 14, and the adhesive flows along the side wall of the second cylinder 113 and fills the gap between the stator core 31 and the second cylinder 113, while the excess adhesive flows along the wall of the second cylinder 113 and is stored in the groove 1131.

[0067] In another embodiment of the present invention, Figures 5 to 7 As shown, the middle part of the stator core 31 is provided with a mounting column 11

[0068] The insulating frame 33 is provided with a first through-hole 311 (specifically, the second barrel 113), the second through-hole 332 for the mounting post 11 (specifically, the second barrel 113) to pass through, and the circuit board 60 is provided with a third through-hole 62 for the mounting post 11 (specifically, the first barrel 112) to pass through. The circuit board 60 is sleeved within the first barrel 112 and positioned between the cover 14 and the stator core 31. The aforementioned clip 331 is positioned at the edge of the opening of the second through-hole 332, that is, the clip 331 is positioned at the edge of the opening of the first through-hole 311 of the stator core 31. The clip 331 is positioned away from the mounting post 11 and the salient pole 313. The provision of the clip 331 does not interfere with the winding of the winding coil 32, nor does it affect the sleeve connection between the stator core 31 and the second barrel 113, nor does it affect the interconnection between other structures of the outer rotor motor of the present application. Correspondingly, the card slot 61 is arranged at the edge of the opening of the third through hole 62. The card slot 61 avoids the mounting column 11 and is arranged close to the opening of the circuit board 60 for the second cylinder 113 to pass through. It will not affect the installation of various electrical components on the circuit board 60 and will not affect the wiring of the circuit board 60.

[0069] In another embodiment of the present invention, Figure 5 、 Figure 6 and Figure 7 As shown, the latch 331 includes an elastic arm 3311 and a barb 3312 disposed at the free end of the elastic arm 3311. The elastic arm 3311 protrudes axially along the axis hole 111, and the barb 3312 is disposed opposite the first through-hole 311 of the insulating frame 33. The slot 61 is a through-slot provided in the circuit board 60, extending axially through the circuit board 60 along the third through-hole 62. The barb 3312 of the latch 331 passes through the through-slot and then hooks onto the circuit board 60. Specifically, the barb 3312 can directly hook onto the side of the circuit board 60 facing the cover 14, i.e., the top surface of the circuit board 60. In this way, the top surface of the circuit board 60 forms a hooking surface for the barb 3312 to hook onto. When installing the circuit board 60, the through-slot is aligned with the latch 331, and the circuit board 60 is moved until the barb 3312 of the latch 331 passes through the through-slot and hooks onto the top surface of the circuit board 60.

[0070] In another embodiment of the present invention, Figure 5 、 Figure 6 and Figure 7As shown, the clip 331 is integrally formed with the insulating frame 33, i.e., the material of the clip 331 is the same as that of the insulating frame 33, and the clip 331 as a whole has a certain degree of elasticity. Thus, to prevent the barb 3312 from falling out of the through-slot, the size of the through-slot is set to be roughly equivalent to the size of the elastic arm 3311 of the clip 331, or slightly larger than the size of the elastic arm 3311 and slightly smaller than the size of the barb 3312. During installation, the barb 3312 is squeezed through the through-slot to ensure that the barb 3312 can hook onto the top surface of the circuit board 60. At the same time, the elastic arm 3311 is inserted into the through-slot. Setting the two to be of equal size prevents the circuit board 60 from shaking and affecting electrical performance. The size of the elastic arm 3311 refers to the thickness of the elastic arm 3311 along the radial direction of the axial hole 111.

[0071] In another embodiment of the present invention, Figure 5 and Figure 6 As shown, the through-slot of the above embodiment is connected to the third through-hole 62 along the radial direction of the third through-hole 62. That is, the through-slot is a notch provided at the edge of the opening of the third through-hole 62, and the size of the portion where the through-slot is provided to connect to the third through-hole 62 is equal to the size of the elastic arm 3311. In this way, the elastic arm 3311 of the buckle 331 can be moved into the through-slot via the third through-hole 62, making the buckle 331 more convenient. Furthermore, by designing the dimensions of the through-slot, the elastic arm 3311, and the barb 3312, a tighter buckle connection is formed between the buckle 331 and the slot 61, further improving the connection stability of the circuit board 60. The size of the elastic arm 3311 also refers to the thickness of the elastic arm 3311 along the radial direction of the shaft hole 111.

[0072] It should be noted that, in this embodiment, the size of the portion where the through slot connects to the third through hole 62 is equal to the size of the elastic arm 3311, which is not limited to being completely equal, but means that the sizes of the two are basically equal within the allowable error range. Moreover, since the elastic arm 3311 has a certain elasticity, in actual design, the size of the portion where the through slot connects to the third through hole 62 can also be set to be slightly smaller than the size of the elastic arm 3311. When the circuit board 60 is buckled, the elastic arm 3311 is used to squeeze and generate elastic deformation to snap into the through slot.

[0073] In another embodiment of the present invention, Figure 5 、 Figure 6 and Figure 7As shown, the insulating frame 33 is further provided with a limiting boss 333. The limiting boss 333 is provided along the axial direction of the shaft hole 111 toward the circuit board 60. The axial extension length of the limiting boss 333 is less than the axial extension length of the buckle 331. When the buckle 331 is buckled into the slot 61, the end of the limiting boss 333 facing away from the insulating frame 33 abuts against the bottom surface of the circuit board 60 facing away from the cover 14. In this way, the circuit board 60 is clamped by the limiting boss 333 and the barb 3312 of the buckle 331. Figure 7 As shown, the axial movement of the circuit board 60 along the shaft hole 111 is restricted, ensuring a more stable and reliable connection of the circuit board 60 to the insulating frame 33. Furthermore, the provision of the limiting boss 333 also serves to separate the insulating frame 33 from the circuit board 60, ensuring that the circuit board 60 is installed at a distance from the insulating frame 33, thereby preventing electrical components on the circuit board 60 from contacting the winding coil 32 and other components, which could cause a short circuit.

[0074] In this embodiment, if Figure 5 and Figure 6 As shown, a plurality of clips 331 are arranged at intervals on the edge of the opening of the second through hole 332 of the insulating frame 33, and a plurality of slots 61 are arranged on the edge of the opening of the third through hole 62 of the circuit board 60. When the circuit board 60 is installed, the plurality of clips 331 are correspondingly engaged with the plurality of slots 61, forming a multi-point connection between the circuit board 60 and the insulating frame 33, and the connection stability of the circuit board 60 is further improved.

[0075] Furthermore, the limiting boss 333 is also positioned at the edge of the second through hole 332 to prevent it from interfering with the placement of the winding coil 32. The limiting boss 333 is also positioned between two adjacent clips 331, avoiding the clips 331. Alternatively, in other embodiments, the clips 331 can be positioned at the end of the limiting boss 333 facing away from the insulating frame 33, and the length of the elastic arm 3311 of the clip 331 can be set to be substantially equal to the thickness of the circuit board 60. This can also ensure a stable connection of the circuit board 60.

[0076] In another embodiment of the present invention, Figures 5 to 7As shown, a first positioning post 334 is further provided at the edge of the opening of the second through hole 332. The first positioning post 334 is spaced apart from the latch 331 and projects toward the circuit board 60 along the axial direction of the shaft hole 111. A first positioning hole 63 is provided on the circuit board 60 at a position corresponding to the first positioning post 334, into which the first positioning post 334 is adapted to be inserted. The first positioning post 334 cooperates with the first positioning hole 63 to determine the assembly position of the circuit board 60 and the insulating frame 33. Compared to the engagement of the latch 331 with the slot 61, the first positioning post 334 can be inserted more smoothly into the first positioning hole 63, thereby improving assembly accuracy and reducing the risk of damage to the latch 331 due to errors in assembly position.

[0077] In this embodiment, the first positioning post 334 is protruded from the limiting boss 333 .

[0078] In this embodiment, only one pair of first positioning posts 334 can be provided to cooperate with the first positioning holes 63 for positioning. Alternatively, multiple sets of first positioning posts 334 can be provided to cooperate with the first positioning holes 63. In this case, the size of the first positioning holes 63 can be set to be substantially equal to the size of the first positioning posts 334. When the first positioning posts 334 are inserted into the first positioning holes 63, they can also limit the radial shaking of the circuit board 60, thereby improving the installation stability of the circuit board 60.

[0079] In another embodiment of the present invention, Figure 6 、 Figure 8 and Figure 9 As shown, the insulating frame 33 can be a split component, and the insulating frame 33 can include an upper frame 335 and a lower frame 336. Along the axial direction of the first through hole 311, the upper frame 335 is connected to the end of the stator core 31 facing the circuit board 60, and the lower frame 336 is connected to the other opposite end of the stator core 31. The upper frame 335 and the lower frame 336 are respectively connected to the stator core 31, thereby electrically isolating the stator core 31 from the winding coil 32. The clips 331 of the above-mentioned embodiments are provided on the upper frame 335, and fourth through holes 3352 are provided at positions on the upper frame 335 directly opposite the barbs 3312. The fourth through holes 3352 extend through the upper frame 335 along the axial direction of the first through hole 311, and the size of the fourth through holes 3352 is set to be greater than or equal to the size of the barbs 3312.

[0080] In this way, since the insulating frame 33 is integrally injection molded, it is necessary to form a buckle 331 with a barb 3312 when it is produced using a mold. Therefore, it is necessary to set a slide in the mold and use the slide mechanism to drive the mold to move sideways (in a direction roughly perpendicular to the mold opening direction) during demoulding so that the mold is separated from the slot 61. This demoulding method is relatively complicated, and the mold cost is relatively high, which is not conducive to cost control of product production. Based on this, the present embodiment sets the insulating frame 33 in a split structure and opens a fourth through hole 3352 in the upper frame 335 where the buckle 331 is set. In this way, simple demoulding can be achieved without adopting other demoulding methods. Demolding is faster and more convenient, and the mold cost is relatively reduced, which helps to reduce the production cost of the insulating frame 33.

[0081] In this embodiment, specifically, Figure 7 、 Figure 8 and Figure 10 As shown, the upper frame 335 is provided with an upper partition portion 3351 at a position corresponding to each salient pole 313, and each upper partition portion 3351 covers the upper half of each salient pole 313. The lower frame 336 is provided with a lower partition portion 3361 at a position corresponding to each salient pole 313, and each lower partition portion 3361 covers the lower half of each salient pole 313. Furthermore, the ends of the upper partition portions 3351 along the axial direction of the second through hole 332 and the ends of the lower partition portions 3361 along the axial direction of the second through hole 332 overlap and connect radially with each other in the second through hole 332. In this way, when the upper partition portions 3351 and the lower partition portions 3361 cooperate to cover the salient poles 313, no gap is formed at the joint, which would affect the insulation effect of the insulating frame 33 on the salient poles 313 and the winding coil 32.

[0082] Specifically, in this embodiment, Figure 8 and Figure 10As shown, the shape and size of the upper partition portion 3351 of the upper frame 335 are adapted to the shape and size of the salient pole 313, and the upper partition portion 3351 includes an upper cover portion 3353 cover portion 14 and an upper side wall portion 3354, wherein the upper cover portion 3353 cover portion 14 corresponds to covering the top surface of the salient pole 313 opposite thereto facing the circuit board 60, and the upper side wall portion 3354 corresponds to being attached to the upper half of the inner side wall of the salient pole 313, and the free end of the upper side wall portion 3354 forms an upper overlapping portion 3355 with decreasing thickness. Similarly, the shape and size of the lower partition portion 3361 of the lower frame 336 also match the shape and size of the salient pole 313. The lower partition portion 3361 includes a lower cover portion 3362, a cover portion 14, and a lower sidewall portion 3363. The cover portion 14 of the lower cover portion 3362 covers the bottom surface of the salient pole 313 opposite it, and the lower sidewall portion 3363 is attached to the lower half of the inner sidewall of the salient pole 313. The free end of the lower sidewall portion 3363 forms a lower overlapping portion 3364 of decreasing thickness. Thus, when the insulating frame 33 is connected to the stator core 31, the upper overlapping portion 3355 overlaps the lower overlapping portion 3364, forming a radially overlapping joint on the insulating frame 33, thereby preventing a gap from forming between the upper partition portion 3351 and the lower partition portion 3361 at the joint.

[0083] Furthermore, in this embodiment, Figure 1 、 Figure 5 and Figure 8 As shown, a salient pole tooth 314 is further provided at one end of each salient pole 313 facing away from the axial hole 111, and the upper side wall portion 3354 and the lower side wall portion 3363 are attached to the inner side wall of the salient pole tooth 314 facing the axial hole 111, that is, the outer side wall of the salient pole tooth 314 is not covered by the insulating frame 33, thereby ensuring the air gap between the stator core 31 and the rotor 41, and ensuring that the stator assembly 30 and the rotor assembly 40 of this embodiment work together.

[0084] In another embodiment of the present invention, Figure 1 、 Figure 3 and Figure 4 As shown, the bearing mounting seat 10 also includes an annular portion 15 arranged around the mounting column 11, and the annular portion 15 is connected to the cover portion 14. Specifically, the annular portion 15 is formed by folding the end of the cover portion 14 away from the mounting column 11 along the axial direction of the shaft hole 111. The rotor 41 has a yoke portion 411 arranged around the mounting column 11. The magnet 42 of the rotor assembly 40 is attached to the inner side wall of the yoke 411 away from the side plate portion 123, and the annular portion 15 wraps around the yoke 411.

[0085] Specifically, in this embodiment, "the annular portion 15 envelops the yoke" means that when the rotor 41 is mounted on the bearing mounting seat 10, the end of the annular portion 15 facing away from the cover portion 14 extends until it overlaps with the end of the yoke 411. At this point, the annular portion 15 envelops the end of the yoke 411. Of course, in other embodiments, if the annular portion 15 is sufficiently large, the annular portion 15 may completely envelop the yoke 411 of the rotor 41.

[0086] In this way, when the stator assembly 30 and the rotor assembly 40 are installed to the bearing mounting seat 10, at least a portion of the yoke 411 of the rotor 41 can extend into the inner side of the annular portion 15. The annular portion 15 wraps around the end of the yoke 411 of the rotor 41 from the outside along the radial direction of the shaft hole 111. Along the axial direction of the shaft hole 111, there is no gap between the annular portion 15 and the yoke 411 of the rotor 41, thereby preventing water vapor, dust, etc. from entering and affecting the normal operation of the magnet 42, the stator assembly 30 and the circuit board 60.

[0087] Please continue reading Figures 1 to 4 and Figures 11 to 14 ,in, Figure 11 for Figure 1 Exploded view of the outer rotor motor bearing mount with power cables installed, Figure 12 for Figure 2 Another view of the bearing mount shown, Figure 13 It is a cutaway view of the power cord sleeve when connected to the wire sleeve; Figure 14 for Figure 11 The structural schematic diagram of the limit plate connected to the bearing mounting seat is shown.

[0088] In another embodiment of the present invention, Figure 1 、 Figure 11 and Figure 12 As shown, the annular portion 15 is provided with an outlet groove 151, the outer rotor motor further includes a power line 20, one end of the power line 20 is connected to the circuit board 60, and the other end of the power line 20 passes through the outlet groove 151, and a limiting plate 17 is connected to the cover 14 and / or the annular portion 15, that is, the limiting plate 17 is connected to the cover 14, or to the annular portion 15, or to both the cover 14 and the annular portion 15, and the limiting plate 17 has a pressing portion 171 arranged toward the outlet groove 151, as shown in FIG. Figure 14 As shown, the pressing portion 171 cooperates with the cable outlet slot 151 to restrict the power cord 20 from moving relative to the cable outlet slot 151 .

[0089] Thus, an outlet slot 151 is provided in the annular portion 15 for leading the power cord 20 out. The annular portion 15 is radially disposed on the side of the stator assembly 30 relative to the axial hole 111. The power cord 20 is led out from the side of the stator assembly 30 to ensure that the axial dimensions of the outer rotor motor are not increased. Furthermore, by attaching a limit plate 17 to the bearing mounting seat 10, the power cord 20 passes through the outlet slot 151 and is prevented from moving relative to the outlet slot 151 by the pressure-limiting action of the pressure portion 171 of the limit plate 17. During operation of the outer rotor motor of this embodiment, the power cord 20 is protected from external forces and thus prevents loosening of the connection points between the power cord 20 and the circuit board 60, winding coil 32, etc., thereby preventing poor contact. Furthermore, the power cord 20 is also protected from repeated bending and breakage due to displacement, effectively preventing damage to the power cord 20 and further improving the overall performance of the outer rotor motor using this embodiment.

[0090] In another embodiment of the present invention, Figure 11 and Figure 12 As shown, the above-mentioned limiting plate 17 also includes a connecting portion 172, the pressing portion 171 is connected to the connecting portion 172, the connecting portion 172 is connected to the cover portion 14, or is connected to the annular portion 15, or is connected to the cover portion 14 and the annular portion 15 at the same time, the pressing portion 171 extends into the wire outlet groove 151, when the power cord 20 passes through the wire outlet groove 151, the pressing portion 171 cooperates with the wire outlet groove 151 to clamp the power cord 20, thereby limiting the movement of the power cord 20.

[0091] In some specific embodiments, the power cord 20 may be a bare wire structure. In this case, the power cord 20 directly passes through the wire outlet slot 151 , and the pressing portion 171 directly presses against the power cord 20 , thereby clamping the power cord 20 .

[0092] In other embodiments, Figure 11 、 Figure 13 and Figure 14 As shown, a protective structure can also be provided to protect the power cord 20. For example, a wire sleeve 18 can be provided on the bearing mounting seat 10. Specifically, one end of the wire sleeve 18 is clamped in the wire outlet groove 151, and the other end of the wire sleeve 18 extends out from the wire outlet groove 151 away from the main body. The wire sleeve 18 is provided with a wire sleeve hole 182 running through both ends. The power cord 20 is passed through the wire sleeve hole 182 of the wire sleeve 18, thereby passing out from the wire outlet groove 151. At this time, the pressing portion 171 of the limiting plate 17 cooperates with the wire outlet groove 151 to clamp the wire sleeve 18, preventing the wire sleeve 18 from moving relative to the wire outlet groove 151, thereby limiting the movement of the power cord 20 relative to the wire outlet groove 151.

[0093] Specifically, if Figure 11 and Figure 13As shown, the bearing mounting seat 10 is provided with a wire sleeve 18 for the power cord 20 to pass through. The power cord 20 specifically includes a protective sleeve 22 and a wire 23 arranged in the protective sleeve 22, and a connector connected to one end of the wire 23. The protective sleeve 22 is sleeved on the end of the wire sleeve 18 located outside the wire outlet groove 151. The wire 23 is passed through the wire hole 182 of the wire sleeve 18 and is connected to the circuit board 60 or the winding coil 32 after passing through the wire sleeve 18. The connector is connected to the end of the wire 23 away from the mounting column 11 and is used to be plugged into an external power supply interface.

[0094] In this embodiment, if Figure 1 、 Figure 11 and Figure 13 As shown, a bayonet 181 is provided at one end of the wire sleeve 18 that is clamped to the wire outlet groove 151, and the groove wall of the wire outlet groove 151 extends obliquely toward the main body to form a protrusion 1511. When the limiting plate 17 is connected to the cover 14, its pressing portion 171 is arranged opposite to the protrusion 1511 and spaced apart. The protrusion 1511 and the pressing portion 171 can be respectively clamped into the bayonet 181 of the wire sleeve 18, so that the wire sleeve 18 is clamped in the wire outlet groove 151 under the cooperation of the protrusion 1511 and the pressing portion 171.

[0095] In some specific embodiments, Figure 11 、 Figure 12 and Figure 14 As shown, the cross-section of the protrusion 1511 in the wire outlet groove 151 is U-shaped, which is adapted to the cross-section of the wire sleeve 18. The pressing portion 171 is just located at the notch position of the wire outlet groove 151. The pressing portion 171 and the protrusion 1511 cooperate to seal and clamp the wire sleeve 18. There is no gap between the wire sleeve 18 and the groove wall of the wire outlet groove 151 and the pressing portion 171, thereby preventing dust, water vapor, etc. from entering. The wire outlet sealing level of the bearing mounting seat 10 is improved, and the waterproof ability is improved.

[0096] In another embodiment of the present invention, Figure 11 、 Figure 12 and Figure 14 As shown, the cover portion 14 of the bearing mounting seat 10 is provided with a wire outlet 141, which is connected to the wire outlet groove 151, and the connecting portion 172 covers the wire outlet 141. In this way, the wire outlet 141 is provided on the cover portion 14, and the size of the wire outlet 141 can be larger than the size of the wire outlet groove 151. When connecting the power cord 20, the power cord 20 is first assembled with the wire sleeve 18, and then the power cord 20 is connected to the winding coil 32 or the circuit board 60. Then, the wire sleeve 18 and the power cord 20 are pulled out of the wire outlet 141. Subsequently, the snap-in 181 of the wire sleeve 18 is snap-fitted with the protrusion 1511 of the wire outlet groove 151. Finally, the limiting plate 17 is connected to the bearing mounting seat 10 so that the pressing portion 171 is correspondingly snapped into the snap-in 181 of the wire sleeve 18.

[0097] Thus, the arrangement of the outlet 141 makes it easier to thread the power cord 20. When connecting the power cord 20, the power cord 20 can be first connected to the winding coil 32 or the circuit board 60 and then led out. Compared with the method of first leading the power cord 20 in and then connecting it to the winding coil 32 or the circuit board 60, the operation is more convenient and the assembly method is simpler and more effective. In addition, the connection portion 172 of the limit plate 17 can cover the outlet 141, and can also prevent dust, moisture, etc. from entering through the outlet 141.

[0098] Specifically, in this embodiment, Figure 12 and Figure 14 As shown, the cover 14 has a connecting arm 143 extending into the outlet 141. The connecting arm 143 is provided with a screw hole 144. The connecting portion 172 of the limiting plate 17 is provided with a connecting hole 1712 for the fastener 100 to pass through at a position corresponding to the screw hole 144. The limiting plate 17 is connected to the cover 14 by having a fastener 100, such as a screw, pass through the connecting hole 1712 and then be screwed to the connecting arm 143. In addition, a second positioning post 145 is protruding from the connecting arm 143. The connecting portion 172 of the limiting plate 17 is provided with a second positioning hole 1711 at a position corresponding to the second positioning post 145. When the limiting plate 17 is screwed to the cover 14, the second positioning post 145 is adapted to be inserted into the second positioning hole 1711, facilitating the positioning and installation of the limiting plate 17.

[0099] In another embodiment of the present invention, Figure 1 、 Figure 3 and Figure 11 As shown, the cover portion 14 further defines an embedding hole 142, which may be a through hole or a blind hole. The bearing mounting seat 10 may further define a seal 19, which seals the embedding hole 142. In actual use, the seal 19 may be a nameplate or label of the product. When the seal 19 is a metal nameplate, the seal 19 may be embedded in the embedding hole 142.

[0100] Another embodiment of the present invention further provides a wind turbine, comprising the above-mentioned outer rotor motor.

[0101] By using the aforementioned outer rotor motor, the fan of the present invention reduces the risk of shaft deformation caused by rotor rotation impacting the bearing mount, improves the operating accuracy and service life of the shaft, and enhances the rotational stability of the rotor. Furthermore, when manufacturing the outer rotor motor, the machining accuracy requirements for the shaft, bearings, and bearing holes are reduced, thereby improving the production efficiency and factory quality of the outer rotor motor. Furthermore, the fan also possesses the other technical advantages of the outer rotor motor provided by the aforementioned embodiments, which will not be further elaborated here.

[0102] It can be understood that the fan of this embodiment is not only suitable for mobile air conditioners, but also for other types of air conditioning units such as window units, split units, etc. Of course, the outer rotor motor of this embodiment is also suitable for other equipment such as exhaust equipment, air purification systems and cooling equipment.

[0103] The above description is only 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 in the scope of protection of the present invention.

Claims

1. An outer rotor motor, comprising a bearing mounting seat, a stator assembly and a rotor assembly, wherein the rotor assembly comprises a rotor and a rotating shaft, characterized in that: The bearing mounting seat is provided with an axial hole, and the axial hole includes a first bearing hole and a second bearing hole. The first end of the rotating shaft is passed through the axial hole. A first bearing is provided in the first bearing hole, and the outer ring of the first bearing is tightly fitted with the hole wall of the first bearing hole. A second bearing is provided in the second bearing hole, and the outer ring of the second bearing is loosely fitted with the hole wall of the second bearing hole. The second end of the rotating shaft extends out of the second bearing hole, and the rotor is mounted on the second end of the rotating shaft; the inner ring of the first bearing is loosely fitted with the rotating shaft, and the inner ring of the second bearing is tightly fitted with the rotating shaft.

2. The outer rotor motor according to claim 1, characterized in that The aperture of the first bearing hole is greater than or equal to the aperture of the second bearing hole, and the outer diameter of the first bearing is greater than or equal to the outer diameter of the second bearing.

3. The outer rotor motor according to claim 1, characterized in that The stator assembly includes a stator core, the bearing mounting seat includes a mounting column, the axial hole is provided in the mounting column, the stator core is provided with a first through hole for the mounting column to pass through, and the hole wall of the first through hole is bonded to the outer peripheral wall of the mounting column by an adhesive.

4. The outer rotor motor according to claim 3, characterized in that The outer peripheral wall of the mounting post is provided with a groove, and the groove can accommodate the adhesive.

5. The outer rotor motor according to claim 3, characterized in that: The outer rotor motor further includes a circuit board, and the stator assembly further includes an insulating frame covering the stator core. The insulating frame is provided with a buckle, and the circuit board is provided with a slot, and the buckle is engaged with the slot.

6. The outer rotor motor according to claim 5, characterized in that The bearing mounting seat further includes a cover portion provided at one end of the mounting column, an installation gap for accommodating the circuit board is formed between the stator core and the cover portion, and the buckle is located in the installation gap.

7. The outer rotor motor according to claim 5, characterized in that The insulating frame is provided with a second through hole for the mounting post to pass through, the circuit board is provided with a third through hole for the mounting post to pass through, the buckle is provided at the edge of the second through hole, and the card slot is provided at the edge of the third through hole.

8. The outer rotor motor according to claim 5, characterized in that The insulating frame is further provided with a limiting boss, and the end of the limiting boss abuts against the circuit board.

9. The outer rotor motor according to claim 6, characterized in that The bearing mounting seat further includes an annular portion arranged around the mounting post, the annular portion is connected to the cover portion, and the rotor includes a yoke portion arranged around the mounting post, the annular portion enclosing the yoke portion.

10. The outer rotor motor according to claim 9, characterized in that The annular portion is provided with a wire outlet groove, and the outer rotor motor also includes a power cord, one end of the power cord is connected to the circuit board, and the other end of the power cord passes through the wire outlet groove. A limiting plate is connected to the cover and / or the annular portion, and the limiting plate has a pressing portion extending into the wire outlet groove, and the pressing portion cooperates with the wire outlet groove to limit the movement of the power cord relative to the wire outlet groove.

11. The outer rotor motor according to claim 10, characterized in that: The bearing mounting seat is further provided with a wire sleeve, and the pressing portion cooperates with the wire outlet groove to clamp one end of the wire sleeve to the wire outlet groove, and the other end of the wire sleeve passes through the wire outlet groove, and the power cord is sleeved in the wire sleeve.

12. The outer rotor motor according to claim 11, characterized in that One end of the wire sleeve is provided with a bayonet, and a protrusion is provided in the wire outlet groove. The protrusion and the pressing part are respectively clamped in the bayonet, and the protrusion cooperates with the pressing part to clamp the wire sleeve.

13. The outer rotor motor according to claim 12, characterized in that The cover is provided with a wire outlet communicating with the wire outlet groove, the limiting plate further comprises a connecting portion connected to the cover and / or the annular portion, the connecting portion covers the wire outlet, and the pressing portion is connected to the connecting portion.

14. A fan, characterized in that: The outer rotor motor comprises the outer rotor motor according to any one of claims 1 to 13.

Images