Fan assembly and blowing device

Abstract

The present application discloses a fan assembly and a blowing device, comprising: a first shell; a second shell, the second shell is arranged in the first shell, the first shell and the second shell are connected by a plurality of air guide plates; a motor stator, the motor stator is arranged in the second shell; fan blades, the fan blades are connected to the motor stator through the motor rotor; a connecting sleeve, the connecting sleeve is arranged between the motor stator and the fan blades, the connecting sleeve is sleeved on the motor rotor and is rotationally connected to the motor rotor, and the connecting sleeve is detachably connected to the second shell and / or the motor stator. The connecting sleeve in the suspended position between the motor stator and the fan blade plays a role in supporting and constraining the position of the motor rotor, improves the concentricity of the motor rotor, reduces the vibration probability of the motor rotor, improves the rotation efficiency of the fan assembly, and also reduces the rotation noise of the fan assembly.

Description

Technical Field

[0001] The present application relates to the field of fans, and in particular to a fan assembly and a blowing device. Background Art

[0002] In the hot summer, fans have become a must-have item for people to get rid of the heat. With people's demand for convenient use, lighter and more portable fans are becoming more and more popular.

[0003] In the prior art, a fan motor and fan blades are arranged inside the fan, wherein the fan motor is fixed in the fan housing, and the fan motor is connected to the fan blades through a rotating shaft. The inventor of the present invention found in his research that since the fan blades are generally arranged at the end of the motor rotor, part of the motor rotor is suspended, lacking a structure to support and constrain the position of the motor rotor. When the fan blades are rotating at high speed, this connection structure reduces the concentricity of the motor rotor, which in turn causes abnormal vibration of the motor rotor, reduces the rotation efficiency of the fan assembly, and increases the rotation noise. Utility Model Content

[0004] The purpose of the present application is to provide a fan assembly and a blowing device that can provide support and restraint for the suspended position of a motor rotor.

[0005] The present application provides a fan assembly, including:

[0006] a first shell;

[0007] a second shell, the second shell being disposed in the first shell, the first shell and the second shell being connected via a plurality of air guide plates;

[0008] a motor stator, wherein the motor stator is disposed in the second housing;

[0009] A fan blade, wherein the fan blade is connected to the motor stator through the motor rotor;

[0010] A connecting sleeve, wherein the connecting sleeve is arranged between the motor stator and the fan blades, the connecting sleeve is sleeved on the motor rotor and is rotationally connected to the motor rotor, and the connecting sleeve is detachably connected to the second housing and / or the motor stator.

[0011] Optionally, the inner surface and / or outer surface of the motor stator is coated with a first insulator; and / or,

[0012] The motor rotor comprises: a rotating shaft, a first sleeve, a second sleeve and a magnetic ring, wherein the magnetic ring, the first sleeve and the second sleeve are all sleeved on the rotating shaft, and the first sleeve and the second sleeve are respectively located on both sides of the magnetic ring; and / or,

[0013] The density of the first shell and / or the second shell is greater than the density of the connecting sleeve; and / or,

[0014] The fan blade is disposed in the first housing, and the maximum diameter of the fan blade is larger than the inner diameter of the second housing and smaller than the inner diameter of the first housing; and / or,

[0015] One end of the connecting sleeve facing the second shell is inserted into the second shell; and / or,

[0016] One end of the connecting sleeve facing the fan blade is inserted into the storage cavity of the fan blade and is rotatably connected to the motor rotor; and / or,

[0017] The connecting sleeve is provided with a limit stop edge, and the limit stop edge abuts against one end of the second shell.

[0018] Optionally, the motor stator comprises: a stator core and a stator winding, the stator core is arranged in the second shell, the stator winding is wound on the stator core, the first insulator is coated on the inner surface and / or outer surface of the stator core, and the first insulator extends outward to cover both ends of the stator core; and / or,

[0019] The first shell and / or the second shell are made of metal material; and / or,

[0020] The connecting sleeve is made of plastic material.

[0021] Optionally, a plurality of first plug-in plates are extended from one end of the first insulator facing the fan blade in the direction of the fan blade, and a receiving cavity is provided on the connecting sleeve, and the plurality of first plug-in plates are inserted into the receiving cavity.

[0022] Optionally, a plurality of stoppers are formed by protrusions on the inner wall of the accommodating cavity, and each of the plurality of first plug-in pieces is located between two adjacent stoppers among the plurality of stoppers; and / or,

[0023] A plurality of second plug-in sheets are extended toward the fan blade from one end of the first insulator facing the fan blade, the plurality of second plug-in sheets correspond to the plurality of first plug-in sheets one by one, the first plug-in sheets and the second plug-in sheets corresponding to each other among the plurality of second plug-in sheets and the plurality of first plug-in sheets are sequentially distributed in the radial direction of the stator core, and a stator winding is provided between the first plug-in sheets and the second plug-in sheets corresponding to each other among the plurality of second plug-in sheets and the plurality of first plug-in sheets; and / or,

[0024] The connecting sleeve is plugged between the second shell and the plurality of first plug-in pieces.

[0025] Optionally, a first bearing is sleeved on the motor rotor, and the connecting sleeve is sleeved on the first bearing; and / or,

[0026] A plurality of hollow grooves are formed at one end of the second shell body facing away from the fan blades, and the plurality of hollow grooves divide the end of the second shell body facing away from the fan blades into a plurality of support frames.

[0027] Optionally, a buffer sleeve is provided between the first bearing and the connecting sleeve, and an interference fit is formed between the first bearing, the buffer sleeve and the connecting sleeve; and / or,

[0028] The stator core is provided with a plurality of first connection holes, and the plurality of first connection holes all penetrate the stator core along the axial direction of the stator core; the connection sleeve is provided with a plurality of second connection holes, and the plurality of second connection holes are arranged corresponding to the plurality of first connection holes; at least some of the plurality of support frames are provided with third connection holes corresponding to the plurality of first connection holes, and internal threads are arranged in the plurality of second connection holes and / or the third connection holes; and / or,

[0029] At least part of the structure of the first bearing is arranged in the receiving cavity, and the end of the connecting sleeve facing the fan blade is inserted into the receiving cavity and sleeved on the first bearing; and / or,

[0030] The limit stopper abuts against or overlaps the side wall of the storage cavity.

[0031] Optionally, the second housing further comprises: an assembly ring, the assembly rings are respectively connected to the plurality of support frames, a second bearing is arranged inside the assembly ring, and the second bearing is connected to an end of the motor rotor facing away from the fan blades; and / or,

[0032] A plurality of support pins are connected to the stator winding of the motor stator, one end of each of the plurality of support pins is plugged into a third plug-in piece formed by the first insulator, and the other ends of each of the plurality of support pins pass through the plurality of hollow slots and extend out of the second housing; and / or,

[0033] The stator core is raised at the positions of the plurality of first connection holes respectively facing the second shell to form positioning protrusions, and the inner surface of the second shell is provided with positioning grooves matching with the positioning protrusions.

[0034] Optionally, the stiffness of the plurality of support pins is greater than the stiffness of the wires in the stator winding; and / or,

[0035] The surfaces of the plurality of support pins are covered with a second insulator; and / or,

[0036] One end of each of the plurality of support pins extending out of the second shell is connected to a PCB circuit board, and the plurality of support pins are enclosed to form a support structure of the PCB circuit board.

[0037] To achieve the purpose of the present application, an embodiment of the present application further provides a blowing device, which is assembled with a fan assembly as described above.

[0038] The beneficial effect of the embodiment of the present application is that by setting a connecting sleeve between the motor stator and the fan blades, the connecting sleeve is rotationally connected to the motor rotor. The connecting sleeve in the suspended position between the motor stator and the fan blades plays a role in supporting and constraining the position of the motor rotor, improving the concentricity of the motor rotor, reducing the vibration probability of the motor rotor, so that the rotation efficiency of the fan assembly is improved, and the rotation noise of the fan assembly is reduced. At the same time, due to the detachable connection of the connecting sleeve relative to the second housing and / or the motor stator, when assembling the fan assembly, the motor rotor and the fan blades can be pre-assembled first, or the motor rotor, the fan blades and the connecting sleeve can be pre-assembled first, and then the connecting sleeve can be fixed, thereby improving the assembly efficiency. It also avoids the problem of damage to other components of the fan assembly due to the large assembly force required when the fan rotor and the fan blades are interference fit. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0040] Figure 1 This is a schematic diagram of the overall structure of a fan assembly according to a specific embodiment of the present application;

[0041] Figure 2 This is a schematic diagram of the exploded structure of a fan assembly according to a specific embodiment of the present application;

[0042] Figure 3 This is a structural schematic diagram of a first shell and a second shell from a first perspective of a specific embodiment of the present application;

[0043] Figure 4 This is a structural schematic diagram of a first shell and a second shell from a second viewing angle of a specific embodiment of the present application;

[0044] Figure 5 This is a schematic diagram of the structure of a motor rotor according to a specific embodiment of the present application;

[0045] Figure 6 This is a schematic structural diagram of a stator core of a specific embodiment of the present application;

[0046] Figure 7 This is a schematic structural diagram of a connecting sleeve according to a specific embodiment of the present application.

[0047] Description of the drawings: 1. first shell; 11. air guide plate; 2. second shell; 21. support frame; 22. hollow groove; 23. third connecting hole; 24. assembly ring; 25. screw; 3. motor stator; 31. stator core; 311. first connecting hole; 312. positioning protrusion; 32. stator winding; 321. support pin; 322. second insulator; 33. first insulator; 331. first plug-in sheet; 332. second plug-in sheet; 333. third plug-in sheet; 4. motor rotor; 41. rotating shaft; 42. first bushing; 43. second bushing; 44. magnetic ring; 45. first bearing; 46. second bearing; 5. fan blade; 51. storage chamber; 6. connecting sleeve; 61. stopper; 62. limit stop edge; 63. second connecting hole; 64. accommodating chamber; 7. PCB circuit board. DETAILED DESCRIPTION

[0048] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0049] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification and in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0050] Example 1

[0051] See also Figure 1 and Figure 2 , Figure 1 is a schematic diagram of the overall structure of the fan assembly of this embodiment; Figure 2 Schematic diagram of the exploded structure of the fan assembly of this embodiment.

[0052] like Figure 1 and Figure 2As shown, a fan assembly comprises: a first housing 1, a second housing 2, a motor stator 3, fan blades 5 and a connecting sleeve 6. The second housing 2 is arranged in the first housing 1, and the first housing 1 and the second housing 2 are connected by a plurality of air guide plates 11; the motor stator 3 is arranged in the second housing 2; the fan blades 5 are connected to the motor stator 3 through the motor rotor 4; the connecting sleeve 6 is arranged between the motor stator 3 and the fan blades 5, the connecting sleeve 6 is sleeved on the motor rotor 4 and is rotatably connected to the motor rotor 4, and the connecting sleeve 6 is detachably connected to the second housing 2 and / or the motor stator 3.

[0053] In this embodiment, the first shell 1, the plurality of air guide plates 11 and the second shell 2 can be manufactured by an integrated manufacturing technology. However, the connection method of the first shell 1 and the second shell 2 is not limited thereto. According to different specific application scenarios, in some embodiments, the first shell 1 and the plurality of air guide plates 11 are integrally arranged, and the plurality of air guide plates 11 and the second shell 2 are fixed by gluing, snapping, interference fit, welding, etc. In some embodiments, the second shell 2 and the plurality of air guide plates 11 are integrally arranged, and the plurality of air guide plates 11 and the first shell 1 are fixed by gluing, snapping, abutting, welding, etc. In some embodiments, the plurality of air guide plates 11 are respectively connected to the first shell 1 and the second shell 2, and the plurality of air guide plates 11 and the first shell 1 are fixed by gluing, snapping, abutting, welding, etc., and the plurality of air guide plates 11 and the second shell 2 are fixed by gluing, snapping, interference fit, welding, etc.

[0054] The ends of the multiple air guide plates 11 close to the fan blades 5 are bent, and the bending direction of the bent ends of the multiple air guide plates 11 is opposite to the rotation direction of the fan blades 5. The bending direction of the air guide plates 11 is opposite to the rotation direction of the fan blades 5. When the fan blades 5 rotate, the airflow will be driven to rotate in the same direction. At this time, the bending direction of the air guide plates 11 is opposite to the rotation direction of the airflow. When the airflow rotates, it contacts and collides with the bent part of the air guide plates 11. Since the directions are opposite, the angle between the airflow and the bent part of the air guide plates 11 when they contact is greater than 90 degrees. The airflow contacts the air guide plates 11 at a larger angle, which can reduce the kinetic energy loss of the airflow contacting the air guide plates 11. During the contact process at a larger angle, the air guide plates 11 have a significant guiding effect on the airflow, with less energy loss, which greatly improves the air outlet efficiency.

[0055] The connecting sleeve 6 is disposed between the motor stator 3 and the fan blades 5, and the connecting sleeve 6 is detachably connected to the motor stator 3. The specific connection method is: the connecting sleeve 6 is fixed to the stator core 31 of the motor stator 3 by a screw 25. However, the detachable connection method between the connecting sleeve 6 and the motor stator 3 is not limited thereto. In some embodiments, one end of the connecting sleeve 6 is inserted into the stator core 31, or connected to the stator core 31 by a snap-on method.

[0056] In some embodiments, the connecting sleeve 6 is detachably connected to the second housing 2. The specific connection method is: the connecting sleeve 6 is fixed to the second housing 2 by a screw 25. However, the detachable connection method between the connecting sleeve 6 and the second housing 2 is not limited thereto. In some embodiments, the connecting sleeve 6 is connected to the second housing 2 by a snap-on or plug-in method.

[0057] In some embodiments, one end of the connecting sleeve 6 is inserted into the second housing 2 , and the connecting sleeve 6 is also connected to the stator core 31 via a screw 25 .

[0058] In the above embodiment, a connecting sleeve 6 is provided between the motor stator 3 and the fan blades, and the connecting sleeve 6 is rotationally connected to the motor rotor 4. The connecting sleeve 6 in the suspended position between the motor stator 3 and the fan blades plays a role in supporting and constraining the position of the motor rotor 4, improving the concentricity of the motor rotor 4, reducing the vibration probability of the motor rotor 4, so that the rotation efficiency of the fan assembly is improved, and the rotation noise of the fan assembly is also reduced. At the same time, due to the detachable connection of the connecting sleeve 6 relative to the second housing 2 and / or the motor stator 3, when assembling the fan assembly, the motor rotor 4 and the fan blades can be pre-assembled first, or the motor rotor 4, the fan blades and the connecting sleeve 6 can be pre-assembled first, and then the connecting sleeve 6 can be fixed, thereby improving the assembly efficiency. It also avoids the problem of damage to other components of the fan assembly due to the large assembly force required when the fan rotor and the fan blades are interference fit.

[0059] See also Figure 7 , Figure 7 Schematic diagram of the structure of the connecting sleeve of this embodiment.

[0060] like Figure 7 As shown, in some embodiments, the inner surface and / or outer surface of the motor stator 3 is coated with a first insulator 33. Specifically, the inner surface of the stator core 31 and the stator winding 32 are coated with the first insulator 33. However, the coverage of the first insulator 33 is not limited thereto. According to different specific application scenarios, in some embodiments, the first insulator 33 is coated on the outer surface of the stator core 31, or the first insulator 33 is coated on the outer surface and the inner surface of the stator core 31.

[0061] The first insulator 33 is specifically made of plastic. However, the material of the first insulator 33 is not limited thereto, and according to different specific application scenarios, in some embodiments, the first insulator 33 can be made of rubber or other insulating materials, which is not specifically limited here.

[0062] Covering the motor stator 3 with the first insulator 33 can prevent the motor stator 3 from leaking electricity or short circuit between the stator windings 32 .

[0063] In some embodiments, the motor rotor 4 includes: a rotating shaft 41, a first sleeve 42, a second sleeve 43 and a magnetic ring 44. The magnetic ring 44, the first sleeve 42 and the second sleeve 43 are all sleeved on the rotating shaft 41, and the first sleeve 42 and the second sleeve 43 are respectively located on both sides of the magnetic ring 44.

[0064] The first sleeve 42 and the second sleeve 43 are respectively arranged on both sides of the magnetic ring 44. The arrangement of the first sleeve 42 and the second sleeve 43 can clamp the magnetic ring 44 to prevent the magnetic ring 44 from shifting under the action of long-term external force. At the same time, the arrangement of the first sleeve 42 and the second sleeve 43 can make the torque distribution of the motor rotor 4 balanced. Compared with the traditional motor, the rotating shaft 41 is only sleeved with the magnetic ring 44, which will make the torque of the rotating shaft 41 at the position where the magnetic ring 44 is located greater than the torque at other positions. When the rotating shaft 41 is in a high-speed rotation state, this difference in torque will cause uneven acceptance of different parts of the rotating shaft 41, and then cause abnormal vibration of the rotating shaft 41. The arrangement of the first sleeve 42 and the second sleeve 43 can make the mass of the rotating shaft 41 in the axial direction balanced, and even in the case of high-speed rotation, it can also maintain torque balance, so that the rotation of the rotating shaft 41 is more stable and efficient.

[0065] In some embodiments, the density of the first shell 1 and / or the second shell 2 is greater than the density of the connecting sleeve 6 .

[0066] The first shell 1 and the second shell 2 are both made of metal or alloy, while the connecting sleeve 6 is made of plastic or rubber. In some embodiments, the first shell 1 is made of metal or alloy, while the second shell 2 and the connecting sleeve 6 are made of plastic or rubber. In some embodiments, the second shell 2 is made of metal or alloy, while the first shell 1 and the connecting sleeve 6 are made of plastic or rubber. In some embodiments, the first shell 1 and the second shell 2 can also be made of plastic or rubber, but the density of the plastic or rubber material of the first shell 1 and the second shell 2 is greater than the plastic or rubber material of the connecting sleeve 6.

[0067] Since the impact strength of the connecting sleeve 6 during the operation of the fan assembly is less than that of the first shell 1 and the second shell 2, reducing the material density of the connecting sleeve 6 can make the fan assembly lighter and reduce the quality of the fan assembly. At the same time, since the connection between the connecting sleeve 6 and the second shell 2 and the motor stator 3 is a detachable connection, reducing the material density of the connecting sleeve 6 can reduce the friction and collision damage caused by the connecting sleeve 6 to the motor stator 3 and the second shell 2 and other fixed and replaceable parts when the two are assembled.

[0068] In some embodiments, the fan blades 5 are disposed in the first housing 1 , and the maximum diameter of the fan blades 5 is greater than the inner diameter of the second housing 2 and smaller than the inner diameter of the first housing 1 .

[0069] The maximum diameter of the fan blade 5 is: the distance between the top ends of the two blades on the diameter of the fan blade 5. The maximum diameter of the fan blade 5 is smaller than the inner diameter of the first shell 1, so that the fan blade 5 can be set in the first shell 1. The first shell 1 protects the fan blade 5, and the fan blade 5 can restrain the blown airflow through the first shell 1, so that the blown airflow has better directionality and higher air outlet efficiency. The maximum diameter of the fan blade 5 is larger than the outer diameter of the second shell 2, so that the second shell 2 can limit the fan blade 5. At the same time, since the maximum diameter of the fan blade 5 is larger than the outer diameter of the second shell 2, the airflow flowing out of the fan blade 5 is difficult to flow to the second shell 2, reducing the cyclone generated when the airflow flows into the second shell 2 and then flows back. The air outlet efficiency is improved and the wind noise is reduced.

[0070] In some embodiments, the end of the connecting sleeve 6 facing the second housing 2 is inserted into the second housing 2. The end of the connecting sleeve 6 facing the second housing 2 is inserted into the second housing 2, which can increase the connection strength of the connecting sleeve 6. At the same time, since the connecting sleeve 6 is inserted into the second housing 2, it is equivalent to sealing or blocking the second housing 2, further preventing the airflow from the fan blades 5 from flowing into the second housing 2, and further reducing the cyclone generated when the airflow flows into the second housing 2 and then flows back. The air outlet efficiency is improved and the wind noise is reduced.

[0071] In some embodiments, one end of the connecting sleeve 6 facing the fan blade is inserted into the storage cavity 51 of the fan blade and is rotationally connected to the motor rotor 4 .

[0072] The connecting sleeve 6 is inserted into the accommodating cavity 64 of the fan blade, so that the connecting sleeve 6 plays a role of sealing and blocking the accommodating cavity 64, reducing the space structure of the fan blade 5 leaking out, reducing the rotation wind resistance of the fan blade 5, and improving the rotation efficiency of the fan blade 5. At the same time, since the connecting sleeve 6 is inserted into the fan blade 5, it plays a good supporting role for the fan blade 5, avoiding the problem of the center of gravity of the rotating shaft 41 being offset due to the tilt of the rotating shaft 41, so that the center of gravity of the structure composed of the rotating shaft 41 and the fan blade 5 is stable and the rotation efficiency is high.

[0073] In some embodiments, a limit stop edge 62 is provided on the connecting sleeve 6, and the limit stop edge 62 abuts against one end of the second housing 2. The setting of the limit stop edge 62 prevents the connecting sleeve 6 from extending into the second housing 2, plays a role of a limit stop, reduces the difficulty of assembling the connecting sleeve 6, and improves the assembly efficiency. At the same time, the setting of the limit stop edge 62 can further close or block the second housing 2 of the connecting sleeve 6, further prevent the airflow from the fan blades 5 from flowing into the second housing 2, and further reduce the cyclone generated when the airflow flows into the second housing 2 and then flows back. The air outlet efficiency is improved and the wind noise is reduced.

[0074] See also Figure 5 and Figure 6 , Figure 5 Schematic diagram of the structure of the motor rotor of this embodiment; Figure 6 Schematic diagram of the structure of the stator core of this embodiment.

[0075] like Figure 5 and Figure 6 As shown, in some embodiments, the motor stator 3 includes: a stator core 31 and a stator winding 32, the stator core 31 is arranged in the second shell 2, the stator winding 32 is wound on the stator core 31, the first insulator 33 is coated on the inner surface and / or outer surface of the stator core 31, and the first insulator 33 extends outward to cover both ends of the stator core 31.

[0076] The first insulator 33 is coated on the inner surface of the stator core 31. However, the coating position of the first insulator 33 is not limited thereto. According to different specific application scenarios, in some embodiments, the first insulator 33 is coated on the outer surface of the stator core 31. In some embodiments, the first insulator 33 is coated on the inner surface and the outer surface of the stator core 31.

[0077] The first insulator 33 extends outward to cover both ends of the stator core 31. Since the fan blades 5 are arranged in the first housing 1 and the electronic core is arranged in the second housing 2, the first insulator 33 extending outward to cover can protect the stator core 31 and prevent the stator core 31 from contacting the fan blades 5.

[0078] In some embodiments, a plurality of first plug-in plates 331 extend from one end of the first insulator 33 facing the fan blades in the direction of the fan blades, and a receiving cavity 64 is defined on the connecting sleeve 6 , into which the plurality of first plug-in plates 331 are inserted.

[0079] The first insulator 33 extends a plurality of first plug-in sheets 331 at one end facing the fan blades. The number of the first plug-in sheets 331 is 6. However, the number of the first plug-in sheets 331 is not limited thereto. Depending on the specific application scenario, in some embodiments, the number of the first plug-in sheets 331 can be (not limited to): 2, 3, 4, 5, 7 or more.

[0080] The connection sleeve 6 is provided with a receiving cavity 64, and a plurality of first plug-in sheets 331 are inserted into the receiving cavity 64. The matching insertion mode of the first plug-in sheets 331 and the receiving cavity 64 can improve the assembly efficiency of the connection sleeve 6. At the same time, due to the matching of the first plug-in sheets 331 and the receiving cavity 64, when the connection sleeve 6 is pressed by an external force, the second housing 2 and the corresponding first plug-in sheets 331 provide support on both the inner and outer sides to offset the external force, thereby improving the strength of the connection sleeve 6.

[0081] In some embodiments, a plurality of stoppers 61 are protruded from the inner wall of the accommodating cavity 64 , and each of the plurality of first plug-in pieces 331 is located between two adjacent stoppers 61 of the plurality of stoppers 61 .

[0082] In this embodiment, the stopper 61 can be a protruding structure protruding on the inner surface of the accommodating cavity 64. However, the structure of the stopper 61 is not limited thereto. In some embodiments, the stopper 61 can be an arc-shaped structure protruding on the inner surface of the accommodating cavity 64 when the screw hole for fixing the connecting sleeve 6 passes through the connecting sleeve 6. In some embodiments, the stopper 61 includes: a protruding structure and an arc-shaped structure.

[0083] The number of the stoppers 61 is 6. However, the number of the stoppers 61 is not limited thereto. Depending on the specific application scenario, in some embodiments, the number of the stoppers 61 can be (not limited to): 2, 3, 4, 5, 7 or more. The specific number of the stoppers 61 needs to be set accordingly according to the number of the first plug-in sheets 331.

[0084] The stopper 61 is arranged in the inner wall of the accommodating cavity 64 to prevent the connecting sleeve 6 from rotating synchronously with the rotating shaft 41 when the rotating shaft 41 rotates, thereby preventing the problem of energy loss of the rotating shaft 41. Therefore, the setting of the stopper 61 has the effect of improving the air outlet efficiency.

[0085] In some embodiments, the first insulator 33 has one end facing the fan blades and extends a plurality of second plug-in tabs 332 in the direction of the fan blades, the plurality of second plug-in tabs 332 correspond to the plurality of first plug-in tabs 331 one by one, the plurality of second plug-in tabs 332 and the first plug-in tabs 331 that correspond to each other are sequentially distributed in the radial direction of the stator core 31, and a stator winding 32 is provided between the plurality of second plug-in tabs 332 and the first plug-in tabs 331 that correspond to each other.

[0086] A plurality of first plug-in sheets 331 are enclosed to form a circle, and a plurality of second plug-in sheets 332 are enclosed to form a circle, and the diameter of the circle enclosed by the first plug-in sheets 331 is greater than the diameter of the circle enclosed by the second plug-in sheets 332. The stator winding 32 is arranged between the first plug-in sheets 331 and the second plug-in sheets 332, so that the stator winding 32 can be better protected and the insulation effect between different stator windings 32 is better.

[0087] In some embodiments, the connecting sleeve 6 is inserted between the second housing 2 and the plurality of first plug-in pieces 331 .

[0088] The connection sleeve 6 is inserted between the second housing 2 and the first plug-in piece 331, and the connection of the connection sleeve 6 is more stable through the clamping force between the second housing 2 and the first plug-in piece 331. At the same time, when the connection sleeve 6 is subjected to external force, the second housing 2 and the first plug-in piece 331 provide support for the connection sleeve 6 on both sides of the connection sleeve 6, thereby improving the force strength of the connection sleeve 6.

[0089] In some embodiments, a first bearing 45 is sleeved on the motor rotor 4 , and the connecting sleeve 6 is sleeved on the first bearing 45 .

[0090] The first bearing 45 is sleeved on the rotating shaft 41, and at least part of the structure of the first bearing 45 is arranged in the receiving chamber 51. The connecting sleeve 6 is sleeved on the first bearing 45. In the process of the rotating shaft 41 driving the fan blade 5 to rotate, the inner ring of the first bearing 45 rotates synchronously with the rotating shaft 41, and the outer ring of the first bearing 45 is fixed to the connecting sleeve 6. The setting of the first bearing 45 can reduce the friction between the rotating shaft 41 and the connecting sleeve 6, so that the rotating shaft 41 rotates more efficiently. At the same time, because when the inner ring of the bearing rotates, the torque of the inner ring is the same or similar to the torque of the first sleeve 42 and the second sleeve 43, the torque of different positions of the rotating shaft 41 during rotation can be similar or close, thereby improving the stability of the rotation of the rotating shaft 41. The first bearing 45 is arranged in the storage cavity 51, and the connecting sleeve 6 is inserted into the storage cavity 51 and connected to the first bearing 45, so that the space in the storage cavity 51 is occupied by the connecting sleeve 6 and the first bearing 45, thereby reducing the probability of airflow entering the storage cavity 51, thereby reducing the probability of airflow vortex generated inside the fan assembly, and improving the air outlet efficiency of the fan assembly.

[0091] See also Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of the structure of the first shell and the second shell from a first viewing angle of this embodiment; Figure 4 It is a structural schematic diagram of the first shell and the second shell from a second viewing angle of this embodiment.

[0092] like Figure 3 and Figure 4 As shown, in some embodiments, a plurality of hollow grooves 22 are formed at one end of the second shell 2 facing away from the fan blades 5 , and the plurality of hollow grooves 22 separate the end of the second shell 2 facing away from the fan blades 5 into a plurality of support frames 21 .

[0093] The side of the second housing 2 facing away from the fan blades 5 is configured as a hollow structure, which can significantly reduce the overall weight of the fan assembly and make the fan assembly more lightweight. The hollow groove 22 is configured so that the hollow groove 22 can be used as a wiring channel for the stator winding 32, thereby preventing the wires of the stator winding from leaking out of the air duct space between the second housing 2 and the first housing 1, reducing the wind resistance inside the fan assembly and improving the air outlet efficiency of the fan assembly.

[0094] In some embodiments, a buffer sleeve is provided between the first bearing 45 and the connecting sleeve 6, and an interference fit is formed between the first bearing 45, the buffer sleeve and the connecting sleeve 6. The provision of the buffer sleeve can make the connection between the connecting sleeve 6 and the first bearing 45 more stable. At the same time, the provision of the buffer sleeve can compensate for the aperture error between the connecting sleeve 6 and the first bearing 45, so that the aperture error has a greater tolerance rate and improves the assembly efficiency.

[0095] The buffer sleeve is sleeved on the first bearing 45. However, the connection method between the buffer sleeve and the first bearing 45 is not limited thereto. According to different specific application scenarios, in some embodiments, the connection method between the buffer sleeve and the first bearing 45 can be (not limited to): gluing, pressing, etc.

[0096] In this embodiment, the buffer sleeve is a silicone ring. However, the material of the buffer sleeve is not limited thereto, and according to different specific application scenarios, in some embodiments, the buffer sleeve can be (but not limited to): fabric, plastic, paper material, etc.

[0097] In some embodiments, a plurality of first connection holes 311 are provided on the stator core 31, and the plurality of first connection holes 311 all penetrate the stator core 31 along the axial direction of the stator core 31; a plurality of second connection holes 63 are provided on the connecting sleeve 6, and the plurality of second connection holes 63 are arranged corresponding to the plurality of first connection holes 311; a third connection hole 23 corresponding to the plurality of first connection holes 311 is provided on at least some of the plurality of support frames 21, and internal threads are arranged in the plurality of second connection holes 63 and / or the third connection holes 23.

[0098] In this embodiment, the number of the first connection holes 311 is 3, and the number of the corresponding second connection holes 63 and the number of the third connection holes 23 are 3. However, the number of the first connection holes 311, the second connection holes 63 and the third connection holes 23 is not limited thereto. According to different specific application scenarios, in some embodiments, the number of the first connection holes 311, the second connection holes 63 and the third connection holes 23 can be (not limited to) 2, 4, 5 or more.

[0099] The first connection hole 311, the second connection hole 63 and the third connection hole 23 correspond to each other and are coaxially arranged, so that the screw 25 can be inserted into the first connection hole 311, the second connection hole 63 and the third connection hole 23 in sequence for screw connection 25. The connecting screw 25 can be inserted from the second connection hole 63, connected to the third connection hole 23 after passing through the first connection hole 311, and the third connection hole 23 is provided with an internal thread. In some embodiments, the connecting screw 25 can be inserted from the third connection hole 23, connected to the second connection hole 63 after passing through the first connection hole 311, and the second connection hole 63 is provided with an internal thread. In some embodiments, in order to increase the stability of the connection, the first connection hole 311, the second connection hole 63 and the third connection hole 23 are all provided with internal threads.

[0100] The arrangement of the first connection hole 311, the second connection hole 63 and the third connection hole 23 can not only fix the connection sleeve 6, but also fix the stator core 31 in the second housing 2. This avoids the problem of the stator core 31 being difficult to install when the stator core 31 is connected to the second housing 2 by interference fit, improves assembly efficiency, and facilitates quick replacement of the stator core 31 and maintenance.

[0101] In some embodiments, at least a portion of the structure of the first bearing 45 is disposed in the receiving cavity 51 , and an end of the connecting sleeve 6 facing the fan blades is inserted into the receiving cavity 51 and sleeved on the first bearing 45 .

[0102] The first bearing 45 is arranged in the storage cavity 51, and the connecting sleeve 6 is inserted into the storage cavity 51 and connected to the first bearing 45, so that the space in the storage cavity 51 is occupied by the connecting sleeve 6 and the first bearing 45, thereby reducing the probability of airflow entering the storage cavity 51, thereby reducing the probability of airflow vortex generated inside the fan assembly, and improving the air outlet efficiency of the fan assembly.

[0103] In some embodiments, the first bearing 45 can be completely placed in the receiving cavity 51 .

[0104] The limit stop 62 abuts or overlaps the side wall of the storage chamber 51. Both sides of the limit stop 62 are connected to the second shell 2 and the storage chamber 51 respectively, so that the connecting sleeve 6 can close or block the second shell 2 and the storage chamber 51, prevent the airflow from entering the second shell 2 and the storage chamber 51, reduce the probability of cyclone generation inside the fan assembly, and improve the air outlet efficiency of the fan assembly.

[0105] In some embodiments, the second housing 2 further includes: an assembly ring 24, the assembly ring 24 is respectively connected to a plurality of support frames 21, a second bearing 46 is arranged in the assembly ring 24, and the second bearing 46 is connected to one end of the motor rotor 4 facing away from the fan blades. The assembly ring 24 is connected to a plurality of support frames 21, forming a semi-enclosed space on one side of the second housing 2 to prevent the motor stator 3 from falling out of the second housing 2 from this side. A second bearing 46 can also be arranged in the assembly ring 24, so that the first bearing 45 and the second bearing 46 are respectively located at both ends of the rotating shaft 41, and the motor rotor 4 plays a good supporting and positioning role. The double-bearing design enables the fan assembly to still have high stability, higher rotation efficiency and less wind noise when rotating at high speed. At the same time, compared with the traditional motor structure, the second housing 2 is semi-enclosed by the support frame 21 and the assembly ring 24, which further reduces the weight of the fan assembly and makes the fan assembly more lightweight.

[0106] In some embodiments, a plurality of support pins 321 are connected to the stator winding 32 of the motor stator 3, one end of each of the plurality of support pins 321 is plugged into a third plug-in piece 333 formed by the first insulator 33, and the other ends of each of the plurality of support pins 321 correspondingly pass through a plurality of hollow grooves 22 and extend out of the second shell 2.

[0107] A plurality of support pins 321 are provided on the stator winding 32, and the plurality of support pins 321 extend out of the second shell 2 through corresponding hollow grooves 22 instead of extending through the space between the second shell 2 and the first shell 1, thereby reducing the wind resistance inside the airway and improving the air outlet efficiency of the fan assembly.

[0108] In this embodiment, the number of the supporting pins 321 is arranged in a one-to-one correspondence according to the number of the stator windings 32 .

[0109] Each support pin 321 is provided with a corresponding third plug-in piece 333. The third plug-in piece 333 is formed by extending the first insulator 33 along one end of the second housing 2 facing away from the fan blade 5, and can fix and support the support pin 321, making the support pin 321 more stable.

[0110] In some embodiments, the stator core 31 is raised at the positions of the plurality of first connection holes 311 facing the second housing 2 to form positioning protrusions 312 , and a positioning groove matching the positioning protrusions 312 is formed on the inner surface of the second housing 2 .

[0111] In this embodiment, the stator core 31 is detachably connected to the second housing 2, and the motor stator 3 is inserted into the second housing 2 from one side of the connecting sleeve 6. Since the motor stator 3 is connected with a support pin 321, each support pin 321 also needs to pass through the hollow groove 22. Therefore, the relative position relationship between the stator core 31 and the second housing 2 is required to be high during assembly. Positioning protrusions 312 are formed by protruding toward the second housing 2 at the positions of the plurality of first connecting holes 311. The positioning protrusions 312 can be set by means of the opening of the first connecting holes 311, and the area loss of the electronic core caused by the opening of the first connecting holes 311 can be compensated by the protruding part of the positioning protrusions 312. The size of the stator core 31 determines the size of the magnetic force of the motor stator 3 after being magnetized by the stator winding 32. The first connecting hole 311 is opened on the stator core 31, and the magnetic force of the electronic core at the position where the first connecting hole 311 is located is inevitably weakened, which leads to uneven distribution of the magnetic force of the electronic core. However, by providing the positioning protrusion 312, the stator core 31 protrudes outward at the position corresponding to the first connecting hole 311, and the area of ​​the protruding portion makes up for the area lost by opening the first connecting hole 311, so that the magnetic force of the stator core 31 after being magnetized at different positions tends to be consistent, thereby improving the rotation efficiency of the fan assembly.

[0112] A positioning groove corresponding to the positioning protrusion 312 is provided on the inner surface of the second housing 2. The cooperation between the positioning protrusion 312 and the positioning groove plays a role in limiting the assembly of the stator coil, so that the stator core 31 can be better aligned and assembled, thereby improving the assembly efficiency. At the same time, the cooperation between the positioning protrusion 312 and the positioning groove can prevent the stator core 31 from rotating relative to the second housing 2 when subjected to force, so that the stator core 31 can also limit its circumferential movement ability when it is not in an interference fit with the second housing 2, thereby breaking through the technical obstacle of the motor housing and the stator core 31 in the prior art that the motor housing and the stator core 31 must be assembled in an interference fit, and realizing the sliding plug-in assembly of the stator core 31 and the second housing 2, greatly improving the assembly efficiency.

[0113] In some embodiments, the rigidity of the plurality of support pins 321 is greater than the rigidity of the wire in the stator winding 32. In this embodiment, the stator winding 32 is usually made of copper wire or copper alloy wire, which is soft, rigid and easy to deform. The support pins 321 are made of materials such as iron, aluminum, iron alloy or aluminum alloy, which are hard, rigid and not easy to deform.

[0114] In some embodiments, the difference in stiffness between the support pin 321 and the wire in the stator winding 32 is not limited to being caused by different materials. In some embodiments, the support pin 321 and the wire in the stator winding 32 are made of the same material, but the diameter of the support pin 321 is larger than the diameter of the wire in the stator winding 32, resulting in a difference in stiffness between the two, and the stiffness of the support pin 321 is greater than the stiffness of the wire in the stator winding 32.

[0115] The rigidity of the support pin 321 is greater than the rigidity of the wire in the stator winding 32, so that the support pin 321 has the characteristic of being difficult to deform. This characteristic of the support pin 321 can prevent the support pin 321 from deforming under the action of external force and contacting other positions of the second housing 2, causing the fan assembly to short-circuit. At the same time, due to the large rigidity, the support pin 321 has a good supporting capacity.

[0116] In some embodiments, the surfaces of the plurality of support pins 321 are coated with a second insulator 322. Even if the support pins 321 coated with the second insulator 322 come into contact with other structures of the second housing 2 under external force, short circuit will not be caused, thereby improving the safety of the fan assembly.

[0117] The second insulator 322 can be made of (but not limited to): anti-electrical plastic, anti-electrical silicone or other anti-electrical materials. The specific material can be selected according to the specific application scenario and is not specifically limited here.

[0118] In some embodiments, one end of the plurality of support pins 321 extending out of the second housing 2 is connected to the PCB circuit board 7 , and the plurality of support pins 321 together form a support structure of the PCB circuit board 7 .

[0119] A plurality of support pins 321 are connected to the PCB circuit board 7 by welding, and together support the PCB circuit board 7. The PCB circuit board 7 is a control circuit for controlling the stator coil to be powered on / off. The PCB circuit board 7 is directly connected to the support pins 321, and the space structure formed by the support pins 321 is reasonably utilized, thereby improving the space utilization rate of the fan assembly, so that the fan assembly does not need to be provided with other structures specifically used to fix the PCB circuit board 7, and the overall structural design of the fan assembly is simplified. At the same time, since a plurality of support pins 321 are arranged around the PCB circuit board 7, the structure for connecting the support pins 321 on the PCB circuit board 7 does not need to be arranged too densely, thereby improving the layout dispersion of the PCB circuit board 7, facilitating the heat dissipation of the PCB circuit board 7, and reducing the electromagnetic interference intensity inside the PCB circuit board 7. The PCB circuit board 7 is supported and arranged in the direction of the air outlet of the fan assembly through the support pins 321, which is convenient for heat dissipation of the PCB circuit board 7 and improves the heat dissipation efficiency of the PCB circuit board 7.

[0120] It should be noted that any implementation in this embodiment can be implemented independently or in combination with one or more other implementations. When implemented in combination, the combination method should not be limited to the combination methods listed in this embodiment.

[0121] Example 2

[0122] A blowing device comprises the fan assembly in embodiment 1, wherein the fan assembly serves as a core module assembly for assembling the blowing device.

[0123] It should be noted that the blowing device in this embodiment includes (but is not limited to): bladeless fans, desktop fans, floor fans, spherical fans, neck fans, handheld fans, industrial fans, air conditioners, hair dryers and other products that need to promote air circulation. The fan assembly in Example 1 is assembled inside the shell of the above products.

[0124] The blowing device in this embodiment is provided with a connecting sleeve 6 between the motor stator 3 and the fan blades, and the connecting sleeve 6 is rotatably connected to the motor rotor 4. The connecting sleeve 6 in the suspended position between the motor stator 3 and the fan blades plays a role in supporting and constraining the position of the motor rotor 4, improving the concentricity of the motor rotor 4, reducing the vibration probability of the motor rotor 4, so that the rotation efficiency of the fan assembly is improved, and the rotation noise of the fan assembly is also reduced. At the same time, due to the detachable connection of the connecting sleeve 6 relative to the second housing 2 and / or the motor stator 3, when assembling the fan assembly, the motor rotor 4 and the fan blades can be pre-assembled first, or the motor rotor 4, the fan blades and the connecting sleeve 6 can be pre-assembled first, and then the connecting sleeve 6 can be fixed, thereby improving the assembly efficiency. It also avoids the problem of damage to other components of the fan assembly due to the large assembly force required when the fan rotor and the fan blades are interference fit.

[0125] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described in the specification. These embodiments are not intended to be additional limitations on the content of the present application. The purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all considered to be within the scope of the present invention; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the scope of protection of the claims attached to the present application.

Claims

1. A fan assembly, characterized in that: include: a first shell; a second shell, the second shell being disposed in the first shell, the first shell and the second shell being connected via a plurality of air guide plates; a motor stator, wherein the motor stator is disposed in the second housing; A fan blade, wherein the fan blade is connected to the motor stator through the motor rotor; A connecting sleeve, wherein the connecting sleeve is arranged between the motor stator and the fan blades, the connecting sleeve is sleeved on the motor rotor and is rotationally connected to the motor rotor, and the connecting sleeve is detachably connected to the second housing and / or the motor stator.

2. The fan assembly according to claim 1, characterized in that: The inner surface and / or outer surface of the motor stator is coated with a first insulator; and / or, The motor rotor comprises: a rotating shaft, a first sleeve, a second sleeve and a magnetic ring, wherein the magnetic ring, the first sleeve and the second sleeve are all sleeved on the rotating shaft, and the first sleeve and the second sleeve are respectively located on both sides of the magnetic ring; and / or, The density of the first shell and / or the second shell is greater than the density of the connecting sleeve; and / or, The fan blade is disposed in the first housing, and the maximum diameter of the fan blade is larger than the inner diameter of the second housing and smaller than the inner diameter of the first housing; and / or, One end of the connecting sleeve facing the second shell is inserted into the second shell; and / or, One end of the connecting sleeve facing the fan blade is inserted into the storage cavity of the fan blade and is rotatably connected to the motor rotor; and / or, The connecting sleeve is provided with a limit stop edge, and the limit stop edge abuts against one end of the second shell.

3. The fan assembly according to claim 2, characterized in that: The motor stator comprises: a stator core and a stator winding, wherein the stator core is arranged in the second housing, the stator winding is wound on the stator core, the first insulator is coated on the inner surface and / or outer surface of the stator core, and the first insulator extends outward to cover both ends of the stator core; and / or, The first shell and / or the second shell are made of metal material; and / or, The connecting sleeve is made of plastic material.

4. The fan assembly according to claim 3, characterized in that: The first insulator has one end facing the fan blades, and a plurality of first plug-in pieces extend in the direction of the fan blades. The connecting sleeve is provided with a receiving cavity, and the plurality of first plug-in pieces are inserted into the receiving cavity.

5. The fan assembly according to claim 4, characterized in that: A plurality of stoppers are formed by protrusions on the inner wall of the accommodating cavity, and each of the plurality of first plug-in pieces is located between two adjacent stoppers among the plurality of stoppers; and / or, A plurality of second plug-in sheets are extended toward the fan blade from one end of the first insulator facing the fan blade, the plurality of second plug-in sheets correspond to the plurality of first plug-in sheets one by one, the first plug-in sheets and the second plug-in sheets corresponding to each other among the plurality of second plug-in sheets and the plurality of first plug-in sheets are sequentially distributed in the radial direction of the stator core, and a stator winding is provided between the first plug-in sheets and the second plug-in sheets corresponding to each other among the plurality of second plug-in sheets and the plurality of first plug-in sheets; and / or, The connecting sleeve is plugged between the second shell and the plurality of first plug-in pieces.

6. The fan assembly according to claim 5, characterized in that: The motor rotor is sleeved with a first bearing, and the connecting sleeve is sleeved on the first bearing; and / or, A plurality of hollow grooves are formed at one end of the second shell body facing away from the fan blades, and the plurality of hollow grooves divide the end of the second shell body facing away from the fan blades into a plurality of support frames.

7. The fan assembly according to claim 6, characterized in that A buffer sleeve is provided between the first bearing and the connecting sleeve, and the first bearing, the buffer sleeve and the connecting sleeve are interference fit; and / or, The stator core is provided with a plurality of first connection holes, and the plurality of first connection holes all penetrate the stator core along the axial direction of the stator core; the connection sleeve is provided with a plurality of second connection holes, and the plurality of second connection holes are arranged corresponding to the plurality of first connection holes; at least some of the plurality of support frames are provided with third connection holes corresponding to the plurality of first connection holes, and internal threads are arranged in the plurality of second connection holes and / or the third connection holes; and / or, At least part of the structure of the first bearing is arranged in the receiving cavity, and the end of the connecting sleeve facing the fan blade is inserted into the receiving cavity and sleeved on the first bearing; and / or, The limit stopper abuts against or overlaps the side wall of the storage cavity.

8. The fan assembly according to claim 6, characterized in that The second housing further comprises: an assembly ring, the assembly rings are respectively connected to the plurality of support frames, a second bearing is arranged inside the assembly ring, and the second bearing is connected to an end of the motor rotor facing away from the fan blades; and / or, A plurality of support pins are connected to the stator winding of the motor stator, one end of each of the plurality of support pins is plugged into a third plug-in piece formed by the first insulator, and the other ends of each of the plurality of support pins pass through the plurality of hollow slots and extend out of the second housing; and / or, The stator core is raised at the positions of the plurality of first connection holes respectively facing the second shell to form positioning protrusions, and the inner surface of the second shell is provided with positioning grooves matching with the positioning protrusions.

9. The fan assembly according to claim 8, characterized in that: The stiffness of the plurality of support pins is greater than the stiffness of the wires in the stator winding; and / or, The surfaces of the plurality of support pins are covered with a second insulator; and / or, One end of each of the plurality of support pins extending out of the second shell is connected to a PCB circuit board, and the plurality of support pins are enclosed to form a support structure of the PCB circuit board.

10. A blowing device, characterized in that: The blowing device is assembled with a fan assembly as described in any one of claims 1-8.

Images