Duct type air conditioner

Abstract

The utility model provides a duct type air conditioner which comprises a main machine body, a fan and a motor, the fan comprises a fan shell and an impeller located on the fan shell, and the motor is provided with a motor shaft coaxially connected with the impeller; the wind shell is provided with a mounting part, the mounting part is provided with a mounting hole coaxial with the impeller, and the mounting hole is used for containing a bearing of the motor shaft. By arranging the installation part used for installing the motor shaft bearing on the wind shell, the installation position of the impeller in the wind shell can be pre-judged according to the structure of the wind shell in the production process, then the arrangement position of the installation part on the wind shell is adjusted, and it is guaranteed that the assembly gap between the impeller and the wind shell is within the acceptable range when the motor shaft bearing is installed on the installation part; and the problem of abnormal sound of the fan caused by an overlarge gap between the impeller and the fan shell is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the air conditioning technical field, and particularly relates to a ducted air conditioner. BACKGROUND

[0002] The motor shaft support frame and the fan volute of the ducted air conditioner are usually fixed to the top cover or the bottom shell of the ducted air conditioner body by screws, so that the actual assembly gap between the fan volute and the fan impeller fixed on the motor shaft is greater than the acceptable assembly gap, and thus the problem of abnormal noise occurs. CONTENT OF THE UTILITY MODEL

[0003] The utility model provides a ducted air conditioner to solve the technical problem of excessive assembly gap between the fan impeller and the fan volute.

[0004] To achieve the above-mentioned purpose, the ducted air conditioner provided by the present application comprises a main body, a fan and a motor, the fan comprises a fan shell and an impeller located in the fan shell, and the motor is provided with a motor shaft coaxially connected with the impeller; the fan shell is provided with a mounting portion, the mounting portion is provided with a mounting hole coaxially arranged with the impeller, and the mounting hole is used for accommodating the bearing of the motor shaft.

[0005] Optionally, in an embodiment, the mounting portion comprises a mounting seat and a plurality of support ribs arranged at intervals with each other, the mounting seat is provided with the mounting hole, and the plurality of support ribs are connected between the mounting seat and the fan shell.

[0006] Optionally, in an embodiment, the mounting portion is located on the outer side of the fan shell, the plurality of support ribs are arranged at intervals in the circumferential direction of the mounting hole, and the two ends of the support rib are respectively connected to the outer surface of the fan shell and the surface in the circumferential direction of the mounting seat.

[0007] Optionally, in an embodiment, the fan shell comprises a first shell and a second shell which are detachably connected, the first shell and the second shell are connected in a head-to-tail manner along the circumferential direction of the impeller; the mounting portion comprises a first mounting portion and a second mounting portion, the first mounting portion is arranged on the first shell, the second mounting portion is arranged on the second shell, and the first mounting portion and the second mounting portion enclose the mounting hole.

[0008] Optionally, in an embodiment, the first mounting portion is provided with a first limiting rib on the side facing the second mounting portion, the second mounting portion is provided with a second limiting rib on the side facing the first mounting portion, and the first limiting rib and the second limiting rib are used for clamping the bearing of the motor shaft in the radial direction of the mounting hole.

[0009] Optionally, in an embodiment, the first mounting portion comprises a first mounting seat for supporting the lower side of the motor shaft bearing and a first end portion connected to the first mounting seat away from the first shell and for shielding at least part of the motor shaft bearing, the first end portion being provided with a support hole coaxial with the mounting hole and having a smaller hole diameter than the mounting hole for supporting one end of the motor shaft bearing.

[0010] Optionally, in an embodiment, the second mounting portion comprises a second mounting seat, the shape of which is adapted to the shape of the first end portion and the shape of the motor shaft bearing.

[0011] Optionally, in an embodiment, the first mounting portion further comprises a plurality of first support ribs connected between the first shell and the first mounting seat, and the second mounting portion further comprises a plurality of second support ribs connected between the second shell and the second mounting seat.

[0012] Optionally, in an embodiment, the opposite two ends of the motor are each provided with a motor shaft, and the fan is arranged in the axial direction of the motor shaft; for each motor shaft, the side of the fan shell farthest from the motor away from the motor is provided with the mounting portion, and the two mounting portions support the bearings of the two motor shafts, respectively.

[0013] Optionally, in an embodiment, the first shell is provided with a buckle and a clamping groove on the outer side close to the second shell, the buckle and the clamping groove being oppositely arranged in the radial direction of the motor shaft; the second shell is provided with a clamping block and a clamping position on the outer side close to the first shell, the clamping block and the clamping position being oppositely arranged in the radial direction of the motor shaft.

[0014] The buckle is clamped with the clamping position, and the clamping block is clamped with the clamping groove.

[0015] The air pipe machine provided in the application solves the problem of abnormal noise of the fan caused by too large gap between the impeller and the fan shell by arranging a mounting portion for mounting the motor shaft bearing on the fan shell, predicting the installation position of the impeller in the fan shell according to the structure of the fan shell in the production process, and then adjusting the arrangement position of the mounting portion on the fan shell to ensure that the assembly gap between the impeller and the fan shell when the motor shaft bearing is mounted on the mounting portion is within an acceptable range. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below only illustrate some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without any creative effort belong to the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0017] Figure 1 is a sectional view of the air duct machine of the present application;

[0018] Figure 2 is a structural diagram of multiple air fans, motors, motor shafts and mounting parts in the present application;

[0019] Figure 3 is Figure 2 is a burst view;

[0020] Figure 4 is an explosion view of the air casing in the present application;

[0021] Figure 5 is a sectional view of the first casing in the present application.

[0022] Explanation of reference numerals:

[0023] 1, main body; 2, air fan; 21, air casing; 211, first casing; 212, second casing; 22, impeller; 23, first mounting part; 231, first mounting seat; 2311, first limiting rib; 232, first end part; 2321, support hole; 233, first support rib; 24, second mounting part; 241, second mounting seat; 2411, second limiting rib; 242, second support rib; 25, mounting hole; 3, motor; 31, motor shaft; 32, bearing; 321, raceway ring; 3211, end head; 3212, limiting groove; 322, rotating body; 4, buckle; 5, buckle position; 6, clamping block; 7, clamping groove.

[0024] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments in combination with the drawings. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without any creative effort belong to the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0026] In the description of the present application, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a unique orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or indicating the number of the technical features referred to. Therefore, the features defined as "first", "second" can be explicitly or implicitly included one or more features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0027] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] The embodiment of the present application provides a ducted fan to solve the problem of excessive assembly gap between the impeller 22 of the fan 2 and the volute of the fan 2. The following will be described with reference to the drawings.

[0029] In the embodiment of the present application, as shown in Figure 1 , Figure 2 and Figure 3 , the ducted fan comprises a main body 1, a fan 2 and a motor 3, the fan 2 comprises a fan shell 21 and an impeller 22 located in the fan shell 21, and the motor 3 is provided with a motor shaft 31 coaxially connected with the impeller 22; the fan shell 21 is provided with a mounting portion, the mounting portion is provided with a mounting hole 25 coaxially arranged with the impeller 22, and the mounting hole 25 is used to accommodate a bearing 32 of the motor shaft 31.

[0030] It should be noted that the impeller 22 is located in the fan shell 21, the impeller 22 is coaxially connected to the motor shaft 31 of the motor 3, the motor 3 drives the impeller 22 to rotate in the fan shell 21, thereby realizing the air outlet of the fan 2. Here, the fan 2 refers to a centrifugal fan 2, and the centrifugal fan 2 is characterized by air inlet from opposite ends of the fan shell 21 and air outlet radially from the fan shell 21. The bearing 32 refers to a structure for supporting the rotation of the motor shaft 31.

[0031] It can be understood that by providing the mounting portion on the wind shell 21, the position of the impeller 22 in the wind shell 21 can be predicted according to the structure of the wind shell 21 during the production of the wind shell 21, and then the setting position of the mounting portion on the wind shell 21 is adjusted. After the motor shaft 31 bearing 32 is installed on the mounting portion and the impeller 22 is installed on the motor shaft 31, it is beneficial to ensure that the assembly gap between the impeller 22 and the wind shell 21 is within an acceptable range, and to solve the problem of abnormal noise of the fan 2 caused by the excessive assembly gap between the wind shell 21 and the impeller 22.

[0032] Further, the mounting portion provided on the wind shell 21 means that the mounting portion is integrally formed with the wind shell 21, or the mounting portion can be detachably connected with the wind shell 21, and the connection mode of integrally forming is preferred. Further, the mounting portion can be provided on the inner side or the outer side of the wind shell 21, and is preferably provided on the outer side of the wind shell 21.

[0033] In some embodiments, as shown in Figure 2 The mounting portion includes a mounting seat and a plurality of support ribs spaced apart from each other, the mounting seat is provided with a mounting hole 25, and the plurality of support ribs are connected between the mounting seat and the wind shell 21.

[0034] It should be noted that the plurality of support ribs connected between the mounting seat and the wind shell 21 means that the mounting seat is connected and supported by the plurality of support ribs.

[0035] It can be understood that since the mounting hole 25 of the mounting portion is coaxially arranged with the impeller 22, according to the characteristics of the centrifugal fan 2, it can be inferred that the mounting portion is located on the air inlet side of the fan 2. Based on this, the plurality of support ribs spaced apart from each other can support the mounting portion for installing the bearing 32, while reducing the hindering effect on the air inlet side of the wind shell 21, and ensuring the air volume of the air inlet side of the wind shell 21.

[0036] In some embodiments, as shown in Figure 3 The mounting portion is located on the outer side of the wind shell 21, the plurality of support ribs are spaced apart circumferentially along the mounting hole 25, and the two ends of the support ribs are respectively connected to the outer surface of the wind shell 21 and the circumferential surface of the mounting seat.

[0037] It can be understood that the mounting portion located on the outer side of the wind shell 21 can avoid interference with the impeller 22 and not block the airflow in the wind shell 21. According to the wind field distribution of the air inlet side of the wind shell 21, the plurality of support ribs are spaced apart circumferentially along the mounting hole 25, which can improve the air inlet volume of the air inlet side of the wind shell 21 compared with other setting modes. Further, connecting one end of the support rib to the circumferential surface of the mounting seat can increase the support force of the motor shaft 31 and its bearing 32 in the radial direction. Connecting the other end of the support rib to the outer surface of the wind shell 21 can also reduce the influence on the air inlet volume of the wind shell 21.

[0038] For example, the supporting ribs can adopt an arc-shaped three-dimensional structure or a straight three-dimensional structure.

[0039] In some embodiments, such as Figure 4 As shown, the wind casing 21 includes a first housing 211 and a second housing 212 that are detachably connected. The first housing 211 and the second housing 212 are connected end to end along the circumference of the impeller 22. The mounting part includes a first mounting part 23 and a second mounting part 24. The first mounting part 23 is disposed in the first housing 211, and the second mounting part 24 is disposed in the second housing 212. The first mounting part 23 and the second mounting part 24 surround each other to form a mounting hole 25.

[0040] It should be noted that "the wind casing 21 includes a detachably connected first casing 211 and a second casing 212, and the first casing 211 and the second casing 212 are connected end to end along the circumference of the impeller 22" means that the first casing 211 and the second casing 212 enclose each other to form a complete wind casing 21 that can surround the impeller 22, and the first casing 211 and the second casing 212 can be connected by common detachable methods such as snap-fit, bolt connection, and pin connection.

[0041] Understandably, the use of separate first housing 211 and second housing 212, as well as separate first mounting part 23 and second mounting part 24, facilitates the installation of the motor shaft 31 and impeller 22 compared to a one-piece molding method. Specifically, after the impeller 22 is installed on the motor shaft 31, the motor shaft 31 is passed through the first housing 211 and its bearing 32 is installed in the first mounting part 23. Then, the second housing 212 is assembled onto the first housing 211, thereby completing the installation.

[0042] For example, the wind shell 21 adopts a volute structure, which is divided into two parts along its radial direction to obtain a first shell 211 and a second shell 212.

[0043] In some embodiments, such as Figure 4 and Figure 5 As shown, a first limiting rib 2311 is provided on the side of the first mounting part 23 facing the second mounting part 24, and a second limiting rib 2411 is provided on the side of the second mounting part 24 facing the first mounting part 23. The first limiting rib 2311 and the second limiting rib 2411 are used to clamp with the bearing 32 of the motor shaft 31 along the radial direction of the mounting hole 25.

[0044] It should be noted that the first limiting rib 2311 and the second limiting rib 2411 are used to be clamped with the bearing 32 of the motor shaft 31 in the radial direction of the mounting hole 25, which means that the bearing 32 of the motor shaft 31 is provided with a limiting groove 3212 corresponding to the first limiting rib 2311 and the second limiting rib 2411 in the circumferential direction, and the first limiting rib 2311 and the limiting groove 3212 and the second limiting rib 2411 and the limiting groove 3212 are in interference fit.

[0045] It can be understood that the first limiting rib 2311 and the second limiting rib 2411 axially limit the bearing 32, prevent the bearing 32 from axially moving during the operation of the motor 3, and ensure the axial gap between the impeller 22 and the wind shell 21.

[0046] Further, the first limiting rib 2311 and the second limiting rib 2411 can be located on the same cross section of the bearing 32, or can be located on different cross sections of the bearing 32, where the cross section refers to a plane formed by cutting the bearing 32 in the radial direction.

[0047] Further, the first limiting rib 2311 and the second limiting rib 2411 extend in the circumferential direction of the mounting hole 25, and the first limiting rib 2311 and the second limiting rib 2411 form a complete ring, and correspondingly, the limiting groove 3212 extends in the circumferential direction of the bearing 32 and penetrates. In this way, on the one hand, the axial limiting effect can be improved, and on the other hand, the coaxiality between the bearing 32 and the mounting seat can be improved.

[0048] In some embodiments, as shown in Figure 5 The first mounting portion 23 includes a first mounting seat 231 and a first end portion 232, the first mounting seat 231 is used to support the lower side of the bearing 32 of the motor shaft 31, the first end portion 232 is connected to the side of the first mounting seat 231 away from the first shell 211 and is used to shield at least part of the bearing 32 of the motor shaft 31, the first end portion 232 is provided with a support hole 2321 coaxial with the mounting hole 25, and the hole diameter of the support hole 2321 is smaller than the hole diameter of the mounting hole 25 to support one end of the bearing 32 of the motor shaft 31.

[0049] It should be noted that, as shown in Figure 5As shown, the motor shaft 31 bearing 32 adopted in the embodiment comprises a raceway ring 321, a rotating body 322 rotatably connected in the raceway ring 321, and rolling bodies rollingly connected between the rotating body 322 and the raceway ring 321. The rotating body 322 is coaxially connected with the motor shaft 31, and an end head 3211 is integrally formed at an axial end of the raceway ring 321, which is used for accommodating one end of the motor shaft 31. The end head 3211 is protrudedly formed at one end of the raceway ring 321 in the axial direction, and the outer diameter of the end head 3211 is smaller than that of the raceway ring 321. Based on this, the first end portion 232 is arranged on the first mounting seat 231 supported at the lower side of the bearing 32, which supports the end head 3211 of the bearing 32 on one hand, and improves the coaxiality between the bearing 32 and the mounting hole 25 on the other hand.

[0050] In some embodiments, as shown in Figure 4 As shown, the second mounting portion 24 comprises a second mounting seat 241, which is shaped to adapt to the shape of the first end portion 232 and the shape of the motor shaft 31 bearing 32. In this way, the first end portion 232 can be accommodated between the first mounting seat 231 and the second mounting seat 241, and the mounting hole 25 can be enclosed between the first mounting portion 23 and the second mounting portion 24 to have better sealing performance, and the coaxiality between the bearing 32 and the mounting portion and the assembly precision can be improved, and the assembly gap between the impeller 22 and the casing 21 can be reduced.

[0051] In some embodiments, as shown in Figure 4 and Figure 5 As shown, the first limiting rib 2311 is arranged at the side of the first mounting seat 231 facing the second mounting seat 241, and the second limiting rib 2411 is arranged at the side of the second mounting seat 241 facing the first mounting seat 231.

[0052] In some embodiments, as shown, the first mounting portion 23 further comprises a plurality of first supporting ribs 233 connected between the first housing 211 and the first mounting seat 231, and the second mounting portion 24 further comprises a plurality of second supporting ribs 242 connected between the second housing 212 and the second mounting seat 241.

[0053] It can be understood that the first supporting ribs 233 and the second supporting ribs 242 arranged correspondingly to the split first mounting seat 231 and the second mounting seat 241 can strengthen the connecting and supporting effect.

[0054] In some embodiments, as shown in Figure 4As shown, the plurality of support ribs are a plurality of first support ribs 233 and a plurality of second support ribs 242; the plurality of first support ribs 233 are arranged equidistantly along the circumference of the mounting hole 25, and the two ends of the first support ribs 233 are connected to the outer surface of the first shell 211 and the circumferential surface of the first mounting seat 231 respectively; the plurality of second support ribs 242 are arranged equidistantly along the circumference of the mounting hole 25, and the two ends of the second support ribs 242 are connected to the outer surface of the second shell 212 and the circumferential surface of the second mounting seat 241 respectively. Through the plurality of equidistantly arranged first support ribs 233 and the plurality of equidistantly arranged second support ribs 242, uniform support force is provided along the circumference of the mounting portion, and the influence on the air volume of the air inlet side of the air shell 21 is reduced.

[0055] In some embodiments, as Figure 2 As shown, the motor 3 is provided with a motor shaft 31 at opposite ends, and the fan 2 is arranged along the axial direction of the motor shaft 31; for each motor shaft 31, the air shell 21 farthest from the motor 3 is provided with a mounting portion on the side away from the motor 3, and the two mounting portions support the bearings 32 of the two motor shafts 31 respectively.

[0056] It should be noted that since a large number of air duct machines are usually provided with multiple fans 2 to meet the air volume demand, a double-shaft motor 3 is used to drive multiple fans 2 to rotate. The "air shell 21 farthest from the motor 3 is provided with a mounting portion on the side away from the motor 3" means that since multiple fans 2 are arranged along the axial direction of each motor shaft 31, the axial distances between different fans 2 and the motor 3 are different, and here it mainly refers to the air shell 21 of the fan 2 farthest from the motor shaft 31. Since the axial distance is the largest, the impeller 22 of the above-mentioned fan 2 deviates from the shaft center to a larger extent under the action of gravity, resulting in a larger assembly error between the fan 2 and the air shell 21. Therefore, the mounting portion is arranged on the side of the air shell 21 farthest from the motor 3, and the assembly error correction is performed on the end of the motor shaft 31 away from the motor 3, thereby solving the problem of larger assembly gap between the impeller 22 and the air shell 21 due to gravity at both ends of the double-shaft motor 3.

[0057] The "for each motor shaft 31, the air shell 21 farthest from the motor 3 is provided with a mounting portion on the side away from the motor 3" means that since the two motor shafts 31 are provided with the impellers 22 of the fans 2, there is an air shell 21 farthest from the motor 3 on each of the two motor shafts 31.

[0058] In some embodiments, as Figure 3 and Figure 4As shown, the first shell 211 is provided with a buckle 4 and a clamping groove 7 on the outer side close to the second shell 212, and the buckle 4 and the clamping groove 7 are oppositely arranged along the radial direction of the motor shaft 31; the second shell 212 is provided with a buckle position 5 and a clamping block 6 on the outer side close to the first shell 211, and the buckle position 5 and the clamping block 6 are oppositely arranged along the radial direction of the motor shaft 31.

[0059] The buckle 4 is connected with the buckle position 5, and the clamping block 6 is connected with the clamping groove 7.

[0060] It can be understood that the buckle 4 and the clamping block 6 with different structures are arranged on the first shell 211 and the second shell 212 respectively, and the corresponding buckle position 5 and clamping groove 7 are arranged, so as to realize the positioning between the first shell 211 and the second shell 212 in different directions.

[0061] In the above embodiments, the description of each embodiment is focused on, and the part not described in detail in a certain embodiment can be referred to the related description of other embodiments. In the description of the present application, the terms "first", "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can be explicitly or implicitly included one or more features.

[0062] The wind pipe machine provided by the embodiments of the present application is described in detail above, and the specific examples are applied to describe the principles and implementation modes of the present application. The above embodiment description is only used to help understand the method and core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed, and the above description should not be understood as the limitation of the present application.

Claims

1. A ducted fan machine characterized by, The fan (2) comprises a fan shell (21) and an impeller (22) located in the fan shell (21), and the motor (3) is provided with a motor shaft (31) coaxially connected with the impeller (22); the fan shell (21) is provided with a mounting portion, the mounting portion is provided with a mounting hole (25) coaxially arranged with the impeller (22), and the mounting hole (25) is used for accommodating a bearing (32) of the motor shaft (31).

2. The ducted fan machine of claim 1, wherein, The mounting portion comprises a mounting seat and a plurality of support ribs arranged at intervals with each other, the mounting seat is provided with the mounting hole (25), and the plurality of support ribs are connected between the mounting seat and the fan shell (21).

3. The ducted fan machine of claim 2, wherein, The mounting portion is located on the outside of the fan shell (21), the plurality of support ribs are arranged at intervals in the circumferential direction of the mounting hole (25), and two ends of the support rib are respectively connected to the outer surface of the fan shell (21) and the surface in the circumferential direction of the mounting seat.

4. The ducted fan machine of claim 1, wherein, The fan shell (21) comprises a first shell (211) and a second shell (212) which are detachably connected and connected in a head-to-tail manner in the circumferential direction of the impeller (22); the mounting portion comprises a first mounting portion (23) and a second mounting portion (24), the first mounting portion (23) is arranged on the first shell (211), the second mounting portion (24) is arranged on the second shell (212), and the first mounting portion (23) and the second mounting portion (24) enclose the mounting hole (25).

5. The ducted fan machine according to claim 4, wherein, The first mounting portion (23) is provided with a first limiting rib (2311) on the side facing the second mounting portion (24), the second mounting portion (24) is provided with a second limiting rib (2411) on the side facing the first mounting portion (23), and the first limiting rib (2311) and the second limiting rib (2411) are used for clamping the bearing (32) of the motor shaft (31) in the radial direction of the mounting hole (25).

6. The ducted fan machine according to claim 5, wherein, The first mounting portion (23) comprises a first mounting seat (231) and a first end portion (232), the first mounting seat (231) is used for supporting the lower side of the bearing (32) of the motor shaft (31), the first end portion (232) is connected to the side of the first mounting seat (231) away from the first shell (211) and is used for shielding at least part of the bearing (32) of the motor shaft (31), the first end portion (232) is provided with a support hole (2321) coaxial with the mounting hole (25), and the hole diameter of the support hole (2321) is smaller than the hole diameter of the mounting hole (25) to support one end of the bearing (32) of the motor shaft (31).

7. The ducted fan machine according to claim 6, wherein, The second mounting portion (24) comprises a second mounting seat (241), and the shape of the second mounting seat (241) is adapted to the shape of the first end portion (232) and the shape of the bearing (32) of the motor shaft (31).

8. The ducted fan machine according to claim 7, wherein, The first mounting part (23) further comprises a plurality of first supporting ribs (233) connected between the first shell (211) and the first mounting seat (231), and the second mounting part (24) further comprises a plurality of second supporting ribs (242) connected between the second shell (212) and the second mounting seat (241).

9. The ducted fan machine of claim 1, wherein, The motor (3) is provided with a motor shaft (31) at opposite ends, and the fan (2) is arranged in the axial direction of the motor shaft (31) in a spaced manner; for each motor shaft (31), the fan shell (21) farthest from the motor (3) is provided with the mounting part on the side away from the motor (3), and the two mounting parts support the bearings (32) of the two motor shafts (31) respectively.

10. The ducted fan machine according to claim 4, wherein, The first shell (211) is provided with a buckle (4) and a clamping groove (7) on the outer side close to the second shell (212), and the buckle (4) and the clamping groove (7) are oppositely arranged in the radial direction of the motor shaft (31); the second shell (212) is provided with a buckle position (5) and a clamping block (6) on the outer side close to the first shell (211), and the buckle position (5) and the clamping block (6) are oppositely arranged in the radial direction of the motor shaft (31); The buckle (4) is connected with the buckle position (5), and the clamping block (6) is connected with the clamping groove (7).

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