Wind wheel mounting structure and ceiling machine

Abstract

The invention provides a wind wheel mounting structure and a ceiling machine. The wind wheel mounting structure comprises a wind wheel assembly, a motor and a locking piece, the wind wheel assembly comprises a bottom plate, fan blades and a hub are arranged on the bottom plate, a flow guide ring is arranged at the upper ends of the fan blades, and the hub partially protrudes out of the flow guide ring; a shaft sleeve is arranged at the end, away from the bottom plate, of the hub, the motor comprises a motor shaft, the motor shaft penetrates through the shaft sleeve, an assembly hole is formed in the side portion of the shaft sleeve, and the locking piece is assembled to the assembly hole in a limited mode and abuts against the motor shaft so that driving connection of the motor and the wind wheel assembly can be achieved. According to the wind wheel mounting structure and the ceiling machine, driving connection between the motor and the wind wheel assembly can be achieved through one locking piece, and the number of needed parts is small; the locking piece can be conveniently installed from the side face, interference of the flow guide ring on installation of the locking piece is avoided, and the assembly efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a wind wheel installation structure and a ceiling fan. Background Art

[0002] A ceiling unit is a ceiling embedded air conditioner, also known as a ceiling unit, a patio unit or an embedded air conditioner. It is controlled by a main unit through air ducts or hot and cold water pipes to connect multiple terminals to control different rooms to adjust the indoor environment. It has the advantages of good heating / control effects and a wide radiation area. It is currently favored by users in larger spaces such as shopping malls, large venues, and office buildings.

[0003] Usually, a ceiling fan includes a motor and a wind wheel. After the two are fixed, the motor is used to drive the wind wheel to rotate to drive air circulation. Its assembly reliability is very important. For this purpose, the Chinese patent application number 201821701359.1 discloses a wind wheel installation structure, including a motor shaft, a sleeve and a nut. The motor shaft passes through the sleeve and is connected to the nut. The nut and the motor shaft cooperate to fix the sleeve on the motor shaft; the installation structure also includes an anti-loosening component, which limits the relative rotation of the sleeve and the motor shaft. Figure 1 Although the above solution can effectively prevent the relative rotation between the shaft stop sleeve and the motor shaft, it requires a combination of an anti-loosening component and a nut for locking, and the large number of parts leads to low production and assembly efficiency.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The problem solved by the present invention is that the existing wind wheel installation structure is unreasonable, resulting in low assembly efficiency and inconvenience in maintenance.

[0006] To solve the above problems, the present invention provides a wind wheel installation structure, wherein the wind wheel assembly comprises a base plate, on which wind blades and a hub are arranged, a guide ring is arranged at the upper end of the wind blade, and the hub partially protrudes from the guide ring; a shaft sleeve is arranged at the end of the hub away from the base plate, and the motor comprises a motor shaft, which passes through the shaft sleeve, and an assembly hole is arranged on the side of the shaft sleeve, and the locking piece is limitedly assembled to the assembly hole and abuts against the motor shaft to realize the driving connection between the motor and the wind wheel assembly.

[0007] This arrangement utilizes the protruding guide ring of the hub to facilitate the installation of the locking piece from the side, thereby avoiding interference of the guide ring with the installation of the locking piece; the drive connection between the motor and the wind wheel assembly can be achieved through a locking piece, and few parts are required. At the same time, the end of the motor shaft does not need to be flattened, thereby avoiding the alignment of the flat part during the installation process, greatly improving the assembly efficiency.

[0008] Preferably, a shaft sleeve is arranged on the side of the hub away from the bottom plate, and the distance M1 between the upper end surface of the shaft sleeve and the guide ring is 30-50 mm. This arrangement makes the overall size of the wind wheel assembly smaller and ensures easy assembly and operation of the wind wheel and the motor.

[0009] Preferably, a baffle is provided on the motor shaft, a limiting groove is provided above the baffle, the baffle abuts against the shaft sleeve or the wind wheel assembly, and the free end of the locking member is limitedly assembled into the limiting groove. The present application can constrain the assembly position of the motor shaft and the wind wheel assembly by the baffle, and at the same time, the relative position of the motor shaft in the direction of its central axis can be constrained by the limiting groove to prevent slipping, so that the transmission is stable and more reliable. The upper part of the baffle is the free end side of the motor shaft, that is, the limiting groove is located on the side of the baffle close to the free end of the motor shaft.

[0010] Preferably, the central axis of the assembly hole and the central axis of the sleeve are arranged perpendicular to each other. This arrangement enables the locking member to exert a vertical force on the motor shaft, requires fewer parts and has stable and reliable transmission.

[0011] Preferably, the locking member comprises a connected nut portion and a stud portion, and the outer peripheral side of the stud portion is provided with an external thread for threaded connection with the assembly hole. During assembly, the nut portion applies force to gradually rotate the stud portion into the assembly hole, and the abutment portion abuts against the motor shaft; since the cross-sectional area of ​​the abutment portion is extremely small, continued force is applied to make the abutment portion and the motor shaft have an interference fit, so that the motor shaft does not need to be flattened, and the alignment of the flattened portion during the installation process is avoided, which greatly improves the assembly efficiency.

[0012] Preferably, the end of the stud part away from the nut part gradually shrinks to form an abutment part for interference fit with the motor shaft with an interference greater than 0.5mm. This arrangement makes it difficult for the motor shaft to slip when the motor drives the wind wheel assembly to rotate, and can take into account both assembly difficulty and transmission reliability.

[0013] Preferably, the fan blade includes a fan blade shell, the fan blade shell includes a pressure surface and a suction surface, and a sound-absorbing notch is arranged on the trailing edge of the fan blade shell.

[0014] When the airflow passes through the trailing edge of the fan blade, a vortex is formed. The silencer notch can reduce the size and intensity of the vortex, while reducing the pressure difference between the pressure surface and the suction surface at the trailing edge of the fan blade housing to reduce the turbulence and resistance of the airflow, which helps to reduce the noise generated by the airflow near the trailing edge of the fan blade housing and improve the fan blade performance of the ceiling fan.

[0015] Preferably, a plurality of protrusions are arranged on the pressure surface of the wind blade, the protrusions are designed in a truncated cone shape, and the plurality of protrusions are evenly distributed on the pressure surface.

[0016] This setting can interfere with the flow of air and reduce the generation of turbulence, thereby achieving the purpose of reducing the airflow noise generated by the fan blade during operation. At the same time, the presence of the convex points also helps to control the separation of airflow on the surface of the fan blade, increase the wind force of the fan blade, and thus improve the noise control performance.

[0017] Preferably, a cavity is formed between the pressure surface and the suction surface, and the pressure surface and the suction surface are integrally formed by blow molding. Forming the cavity and integrally forming by blow molding can increase the structural strength of the fan blade. This design can make the fan blade more durable, especially under high-speed and high-load conditions. At the same time, the cavity formed between the pressure surface and the suction surface can absorb part of the noise vibration, reduce the noise transmitted to the outside, reduce the vibration and noise level of the fan blade, reduce the generation and loss of vortex, and improve the aerodynamic efficiency of the fan blade.

[0018] Compared with the prior art, the wind wheel mounting structure described in the present invention has the following beneficial effects: 1) The guide ring protrudes from the hub portion to facilitate the installation of the locking member from the side, thereby avoiding interference of the guide ring with the installation of the locking member; the drive connection between the motor and the wind wheel assembly can be achieved through a locking member, and fewer parts are required. At the same time, the end of the motor shaft does not need to be flattened, thereby avoiding alignment of the flattened part during the installation process, greatly improving assembly efficiency; 3) The existing structure is modified slightly, which is easy to implement.

[0019] The present invention also provides a ceiling machine, comprising the above-mentioned wind wheel installation structure, and also comprising a chassis, wherein the motor is fixedly mounted on the chassis and is used to drive the wind wheel assembly to rotate. The ceiling machine has the same beneficial effects as the wind wheel installation structure, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the assembly of the wind wheel installation structure described in the prior art;

[0021] Figure 2 It is an overall schematic diagram of the wind wheel installation structure of the present invention;

[0022] Figure 3 It is a cross-sectional schematic diagram of the wind wheel installation structure of the present invention;

[0023] Figure 4 This is an exploded schematic diagram of the wind wheel installation structure of the present invention;

[0024] Figure 5 is an overall schematic diagram of the wind wheel assembly of the present invention;

[0025] Figure 6 is a cross-sectional schematic diagram of the wind wheel assembly of the present invention;

[0026] Figure 7It is a schematic diagram of the side structure of the fan blade of the present invention;

[0027] Figure 8 This is a schematic diagram of the structure of the fan blade according to the present invention from a second viewing angle;

[0028] Fig. 9 This is a schematic diagram of the structure of the fan blade according to the present invention from a third viewing angle;

[0029] Fig.10 This is a schematic diagram of the size identification structure of the notch structure on the fan blade of the present invention;

[0030] Fig.11 It is a structural schematic diagram of the motor of the present invention;

[0031] Fig.12 It is a schematic diagram of the structure of the locking member of the present invention.

[0032] Description of reference numerals:

[0033] 1-wind wheel assembly; 11-wheel hub; 12-base plate; 13-guide ring; 14-blade; 1401-leading edge; 1402-trailing edge; 1403-upper edge; 1404-lower edge; 141-blade housing; 1411-pressure surface; 1412-suction surface; 142-silencing gap; 1421-gap guide surface; 143-bump; 15-air outlet; 2-motor; 21-motor shaft; 22-blocking piece; 23-limiting groove; 24-sleeve; 241-assembly hole; 3-locking piece; 31-nut part; 311-groove; 32-stud part; 321-external thread; 322-abutment part; 4-chassis; 5-linkage insert; 6-hexagonal flange nut. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objectives, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. The technical features in the embodiments of the present invention can be combined with each other without conflict.

[0035] It should be noted that all the terms used in the present invention for directional and positional indications, such as "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", "top", "low", "lateral", "longitudinal", "center", etc., are only used to explain the relative positional relationship and connection status between the components in a certain state (as shown in the accompanying drawings), and are only for the convenience of describing the present invention, rather than requiring the present invention to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes, and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features.

[0036] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The existing wind wheel installation structure includes a motor shaft 21, a sleeve 24 and a hexagonal flange nut 6, a linkage insert 5 is arranged between the hexagonal flange nut 6 and the sleeve 24, and the linkage insert 5 and the hexagonal flange nut 6 are required to cooperate and lock the wind wheel assembly 1 and the motor 2 when they are assembled. The large number of parts leads to low production and maintenance efficiency. To this end, the applicant proposes the following technical solution:

[0038] Example 1

[0039] like Figure 2-12 As shown, a wind wheel installation structure includes a wind wheel assembly 1, a motor 2, and a locking member 3. The wind wheel assembly 1 is fixedly assembled with a shaft sleeve 24 on a side away from the motor 2. The motor 2 includes a motor shaft 21. The motor shaft 21 is arranged through the shaft sleeve 24. An assembly hole 241 is arranged on the side of the shaft sleeve 24. The locking member 3 is limitedly assembled to the assembly hole 241 and abuts against the motor shaft 21 to realize the driving connection between the motor 2 and the wind wheel assembly 1.

[0040] The present application can realize the driving connection between the motor 2 and the wind wheel assembly 1 through a locking member 3, and requires few parts. At the same time, the end of the motor shaft 21 does not need to be flattened, so as to avoid the alignment of the flattened part during the installation process, and greatly improve the assembly efficiency. The motor 2 is fixedly assembled on the chassis 4, and the assembly relationship between the two is the prior art, which will not be described in detail here.

[0041] As a preferred example of the present application, a baffle 22 is provided on the motor shaft 21, a limiting groove 23 is provided above the baffle 22, the baffle 22 abuts against the shaft sleeve 24 or the wind wheel assembly 1, and the free end of the locking member 3 is limitedly assembled into the limiting groove 23. The present application can constrain the assembly position of the motor shaft 21 and the wind wheel assembly 1 by the baffle 22, and at the same time, the limiting groove 23 can constrain the relative position of the motor shaft 21 in the direction of its central axis to prevent slipping, and the transmission is stable and more reliable.

[0042] Preferably, the central axis of the assembly hole 241 is perpendicular to the central axis of the motor shaft 21. Preferably, the free end of the locking member 3 is interference-fitted with the side wall of the motor shaft 21, and the interference is greater than 0.5 mm. This arrangement prevents the motor shaft 21 from slipping when the motor 2 drives the wind wheel assembly 1 to rotate, and can take into account both assembly difficulty and transmission reliability.

[0043] Preferably, the cross section of the limiting groove 23 is circular and is coaxially arranged with the motor shaft 21. A baffle is arranged in the limiting groove 23, and the baffle is arranged parallel to the motor shaft 21, and is used to abut against one side of the locking member 3. This arrangement can use the baffle to prevent the locking member and the sleeve from rotating relative to each other, further ensuring stable and reliable transmission.

[0044] As an example of the present application, the wind wheel assembly 1 includes a hub 11, a bottom plate 12, and a guide ring 13. The lower edge of the hub 11 extends to form the bottom plate 12. The bottom plate 12 is provided with a fan blade 14, and the fan blade 14 is plugged into the bottom plate 12. The upper end of the fan blade 14 is plugged into the guide ring 13. The guide ring 13 is provided with a through air inlet, and an air outlet 15 is formed between the bottom plate 12, the guide ring 13, and the fan blade 14. When the motor 2 drives the wind wheel assembly 1 to rotate, air enters from the air inlet of the guide ring 13, and finally exits from the air outlet 15, thereby realizing the circulation of airflow.

[0045] As a preferred example of the present application, the bottom plate 12 is provided with blade slots for installing and fixing the fan blades 14; the blade slots are distributed at equal intervals along the circumference of the bottom plate 12. Preferably, the two ends of the fan blade 14 are respectively snap-fitted and assembled with the bottom plate 12 and the guide ring 13, and this arrangement makes the fan blade 14, the bottom plate 12, and the guide ring 13 a detachable structure, which is convenient for the maintenance and assembly of the wind wheel assembly 1; of course, the fan blade 14 can also be fixed to the bottom plate 12 and the guide ring 13 by bonding to ensure a secure assembly.

[0046] As a preferred example of the present application, the hub 11 is partially protruding from the guide ring 13, the sleeve 24 is fixedly mounted on the hub 11 and is located above the guide ring 13, and the minimum distance M1 between the sleeve 24 and the guide ring 13 is 30-50 mm. This arrangement is convenient to operate and is easy to achieve locking with the motor shaft 21 and the wind wheel assembly 1.

[0047] As a preferred example of the present application, the locking member 3 includes a connected nut portion 31 and a stud portion 32, the cross section of the nut portion 31 is a regular hexagon, a groove 311 is provided at one end of the nut portion 31 away from the stud portion 32, the cross section of the groove 311 is a "cross" shape, and an external thread 321 is provided on the outer peripheral side of the stud portion 32 for threaded connection with the assembly hole 241. The end of the stud portion 32 away from the nut portion 31 gradually shrinks to form an abutment portion 322 for interference assembly with the motor shaft 21.

[0048] During assembly, force is applied through the nut portion 31 to gradually rotate the stud portion 32 into the assembly hole 241, and the abutment portion 322 abuts against the motor shaft 21; since the cross-sectional area of ​​the abutment portion 322 is extremely small, continued force is applied to make the abutment portion 322 and the motor shaft 21 interference fit, thereby eliminating the need to flatten the motor shaft 21, avoiding alignment of the flattened portion during installation, and greatly improving assembly efficiency.

[0049] As a preferred example of the present application, radially evenly distributed anti-loosening teeth are provided on one side of the nut portion 31 close to the stud portion 32, and the anti-loosening teeth are distributed along the radius direction of the circle where the nut portion 31 is located. The anti-loosening teeth include a vertical surface perpendicular to the nut portion 31 and an inclined surface with an angle A with the nut portion 31, and the angle A ranges from 5-15°. The inclined surfaces of each anti-loosening tooth are inclined in the same direction in any year. This setting requires a greater unscrewing force under the same tightening force, which effectively increases the difficulty of loosening the locking member 3, and the wind wheel mounting structure operates stably.

[0050] The present application also discloses a ceiling machine, including the wind wheel installation structure as described above. The ceiling machine also includes a chassis 4, an evaporator, a panel and other structures. The specific structures and assembly relationships thereof are all prior arts and will not be described in detail here.

[0051] Example 2

[0052] like Figure 5-10 As shown, the fan blade 14 includes a fan blade shell 141 , and the fan blade shell 141 includes a pressure surface 1411 and a suction surface 1412 . A sound-absorbing notch 142 is provided on the trailing edge 1402 of the fan blade shell 141 .

[0053] The present application sets a silencer notch 142 on the trailing edge 1402 of the fan blade housing 141. When the airflow passes through the trailing edge 1402, a vortex is formed. The silencer notch 142 can reduce the size and intensity of the vortex, while reducing the pressure difference between the pressure surface 1411 and the suction surface 1412 at the trailing edge 1402 of the fan blade housing 141, so as to reduce the turbulence and resistance of the airflow, and help reduce the noise generated by the airflow near the trailing edge 1402 to improve the performance of the fan blade 14; by setting a silencer notch 142 on the trailing edge 1402 of the fan blade housing 141, the airflow noise is reduced, the noise performance of the equipment is improved, and the user experience is enhanced.

[0054] As a preferred example of the present application, the trailing edge 1402 of the fan blade housing 141 is streamlined from the upper edge 1403 to the lower edge 1404 , which tends to approach the leading edge 1401 , and the silencer notch 142 is arranged on the trailing edge 1402 close to the lower edge 1404 .

[0055] This arrangement helps to further reduce the vortex formed by the airflow around the trailing edge 1402, can more effectively guide the airflow and reduce the turbulent area, and because the position close to the lower edge 1404 on the trailing edge 1402 is usually where the airflow separates and turbulence is formed, by setting a silencer notch 142 in this area, the formation of turbulence can be interfered with, thereby achieving the purpose of reducing noise and improving the performance of the fan blade 14, and may also improve energy efficiency.

[0056] As a preferred example of the present application, the muffler notch 142 is arranged in an arc shape from the upper edge 1403 to the lower edge 1404, and the notch guide surface 1421 on the muffler notch 142 is arranged in an inclined shape from the end close to the trailing edge 1402 to the end close to the leading edge 1401. The overall structure is in an arc shape and the notch guide surface 1421 is arranged in an inclined shape, so that the airflow guided by the fan blade 14 can smoothly pass through the muffler notch 142, reducing the turbulence and resistance of the airflow, thereby reducing the noise level, and at the same time, it also helps to reduce the formation of vortices, improve the stability of the airflow, improve the efficiency of the fan blade 14, better control the flow of the airflow, and reduce the mechanism of generating noise, thereby improving the overall performance of the fan blade 14.

[0057] As a preferred example of the present application, the height of the lower end of the silencer notch 142 from the lower surface of the lower edge 1404 is H1, the height of the upper end of the silencer notch 142 from the lower surface of the lower edge 1404 is H2, the length of the edge of the center of the silencer notch 142 close to the trailing edge 1402 from the tail of the lower edge 1404 is L1, the length of the edge of the center of the silencer notch 142 close to the leading edge 1401 from the tail of the lower edge 1404 is L2, H1, H2, L1, L2 satisfy the following relationship: 5*(L2-L1)>H2-H1>2*(L2-L1), and the value range of H1 is 0.4L1~0.65L1.

[0058] Specifically, taking the lower section of the trailing edge 1402 of the fan blade 14 as a reference, the width of the muffler notch 142 between the leading edge 1401 and the trailing edge 1402 is the X direction, the height of the muffler notch 142 between the upper edge 1403 and the lower edge 1404 is the Y direction, the length of the muffler notch 142 in the X direction is 16mm-25mm, and the height in the Y direction is 8mm-38mm, specifically, L1=16.18mm, L2=24.36mm, H1=8.36mm, H2=38mm. The height and length parameters of the muffler notch 142 and the relationship between them may have an important impact on noise control. After simulation and experimental measurements, limiting the parameters within the above-defined range can achieve better results. On the one hand, the fan blade 14 formed in the end can have a larger air volume, ensuring the working efficiency of the fan blade 14. On the other hand, this setting helps to reduce airflow noise, and the wind noise can also be effectively controlled, thereby achieving a balance between noise control and the performance requirements of the fan blade 14.

[0059] As a preferred example of the present application, the cut surface angle of the notch guide surface 1421 from the end close to the suction surface 1412 to the end close to the pressure surface 1411 is β, and the value range of β is 25° to 35°. Preferably, the value range of β is 28° to 30°. The fan blade 14 described in the present application optimizes the cut surface angle β of the silencer notch 142 to avoid or weaken the generation of vortices, improve the regularity and stability of airflow, further avoid the generation of airflow noise, and reduce the flow noise of airflow.

[0060] As a preferred example of the present application, a plurality of convex points 143 are provided on the pressure surface 1411 of the fan blade 14. Preferably, the convex points 143 are designed in a truncated cone shape, and the plurality of convex points 143 are evenly arranged on the pressure surface 1411. By providing a plurality of evenly arranged convex points 143 on the pressure surface 1411, the flow of the airflow can be disturbed, and the turbulence generation can be reduced, thereby achieving the purpose of reducing the airflow noise generated by the fan blade 14 during operation. At the same time, the presence of the convex points 143 also helps to control the separation of the airflow on the surface of the fan blade 14 to increase the wind force, thereby improving the purpose of noise control performance.

[0061] As a preferred example of the present application, a cavity is formed between the pressure surface 1411 and the suction surface 1412, and the pressure surface 1411 and the suction surface 1412 are integrally formed by blow molding. Forming a cavity and integrally forming by blow molding can increase the structural strength of the fan blade 14. This design can make the fan blade 14 more durable, especially under high-speed and high-load conditions. At the same time, the cavity formed between the pressure surface 1411 and the suction surface 1412 can absorb part of the noise vibration, reduce the noise transmitted to the outside, reduce the vibration and noise level of the fan blade 14, and reduce the generation and loss of vortex to improve the aerodynamic efficiency of the fan blade 14. In addition, through integral blow molding, the fan blade 14 can be manufactured more easily and economically, reducing the number of parts and the complexity of assembly.

[0062] The fan blade 14 has a hollow structure formed by blow molding, a sound-absorbing structure with a protrusion 143 is added to the surface of the fan blade 14, and a sound-absorbing notch 142 is added to the tail of the fan blade 14, so as to reduce the noise generated by the airflow near the trailing edge 1402 on the fan blade shell 141 and improve the user experience.

[0063] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A wind wheel installation structure, characterized in that: The invention comprises a wind wheel assembly (1), a motor (2), and a locking member (3); the wind wheel assembly (1) comprises a base plate (12); a wind blade (14) and a hub (11) are arranged on the base plate (12); a guide ring (13) is arranged at the upper end of the wind blade (14); the hub (11) partially protrudes from the guide ring (13); a shaft sleeve (24) is arranged at one end of the hub (11) away from the base plate (12); the motor (2) comprises a motor shaft (21); the motor shaft (21) passes through the shaft sleeve (24); a mounting hole (241) is arranged on the side of the shaft sleeve (24); the locking member (3) is limitedly assembled to the mounting hole (241) and abuts against the motor shaft (21) to realize the driving connection between the motor (2) and the wind wheel assembly (1).

2. The wind wheel installation structure according to claim 1, characterized in that: A shaft sleeve (24) is arranged on a side of the wheel hub (11) away from the bottom plate (12), and a distance M1 between an upper end surface of the shaft sleeve (24) and the guide ring (13) is 30-50 mm.

3. The wind wheel installation structure according to claim 2, characterized in that: A baffle (22) is arranged on the motor shaft (21), a limiting groove (23) is arranged above the baffle (22), the baffle (22) abuts against the shaft sleeve (24) or the wind wheel assembly (1), and the free end of the locking member (3) is limitedly assembled in the limiting groove (23).

4. The wind wheel installation structure according to claim 2, characterized in that: The central axis of the assembly hole (241) and the central axis of the shaft sleeve (24) are arranged perpendicular to each other.

5. The wind wheel installation structure according to claim 3, characterized in that: The locking member (3) comprises a nut portion (31) and a stud portion (32) which are connected to each other. An external thread (321) is provided on the outer peripheral side of the stud portion (32) for threaded connection with the assembly hole (241).

6. The wind wheel installation structure according to claim 5, characterized in that: One end of the stud portion (32) away from the nut portion (31) gradually shrinks to form an abutment portion (322) for interference fitting with the motor shaft (21) with an interference amount greater than 0.5 mm.

7. The wind wheel installation structure according to claim 1, characterized in that: The fan blade (14) comprises a fan blade shell (141), the fan blade shell (141) comprises a pressure surface (1411) and a suction surface (1412), and a sound-absorbing notch (142) is arranged on the trailing edge (1402) of the fan blade shell (141).

8. The wind wheel installation structure according to claim 7, characterized in that: A plurality of convex points (143) are arranged on the pressure surface (1411) of the fan blade (14); the convex points (143) are designed in a truncated cone shape, and the plurality of convex points (143) are evenly distributed on the pressure surface (1411).

9. The wind wheel installation structure according to claim 8, characterized in that: A cavity is formed between the pressure surface (1411) and the suction surface (1412), and the pressure surface (1411) and the suction surface (1412) are integrally formed by blow molding.

10. A ceiling machine, characterized in that: It comprises the wind wheel mounting structure according to any one of claims 1 to 9, and also comprises a chassis (4), and the motor (2) is fixedly mounted on the chassis (4) for driving the wind wheel assembly (1) to rotate.

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