Fan and range hood

Abstract

The fan comprises an impeller assembly, a motor assembly and a connecting piece, the impeller assembly is provided with a wheel disc, the motor assembly is provided with an output shaft, the connecting piece is provided with a shaft portion and a connecting protruding portion, the connecting protruding portion protrudes outwards in the radial direction from the outer edge of the shaft portion and divides the shaft portion into a first shaft section and a second shaft section, the wheel disc is arranged on the first shaft section in a sleeved mode, and the wheel disc is arranged on the second shaft section in a sleeved mode. The end, away from the connecting convex part, of the second shaft section is connected with the output shaft through a coupler, and the connecting convex part is provided with a contact end face attached to the wheel disc in the length direction of the shaft part. According to the fan, due to the arrangement of the connecting piece, not only is the connection of the wheel disc and the output shaft achieved, but also the connecting convex part is in surface contact with the wheel disc through the contact end face, the connection stability of the wheel disc and the output shaft is enhanced, and the problems that when the diameter of the impeller assembly is large or the rotating speed is high, large noise and abnormal sound are generated are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, in particular to a fan and a range hood. Background Art

[0002] As people's quality of life improves, their expectations for kitchen cooking environments are also growing. Range hoods have become an indispensable appliance in modern homes. A range hood uses a motor to drive the impeller at high speed, creating a negative pressure zone near the smoke collection chamber, drawing fumes into the hood and exhausting them outdoors.

[0003] In existing range hoods, the impeller mounting structure is mostly a riveted impeller disc attached to a sleeve, with the output shaft passing through the sleeve and locked in place by a locking member. In other words, the impeller and output shaft are locked together by a shaft end lock, allowing the impeller to rotate with the output shaft. To achieve high air volume and high air pressure in range hoods, this is currently achieved by increasing the impeller diameter or speed. However, as the impeller diameter and speed increase, the impeller's rotational stability is easily affected by the shaft end lock connection between the impeller and the output shaft. This can cause vibration during rotation, leading to increasing noise and even shortening the impeller's service life. Utility Model Content

[0004] In order to at least partially solve the problems existing in the prior art, according to one aspect of the present invention, a fan is provided, and the technical solution is as follows.

[0005] The fan includes an impeller assembly, a motor assembly and a connecting piece, the impeller assembly has a wheel disc; the motor assembly has an output shaft; the connecting piece has a shaft portion and a connecting protrusion, the connecting protrusion protrudes radially outward from the outer edge of the shaft portion and divides the shaft portion into a first shaft segment and a second shaft segment, the wheel disc is sleeved on the first shaft segment, and the end of the second shaft segment away from the connecting protrusion is connected to the output shaft through a coupling; wherein, in the length direction of the shaft portion, the connecting protrusion has a contact end surface that fits with the wheel disc.

[0006] The fan of the present invention not only realizes the connection between the impeller and the output shaft through the arrangement of the connecting parts, but also the connecting protrusion forms surface contact with the impeller through the contact end face, thereby enhancing the connection stability between the impeller and the output shaft (that is, enhancing the connection stability between the impeller assembly and the motor assembly), and avoiding problems such as large noise and abnormal sound generated when the impeller assembly has a large diameter or a fast rotation speed.

[0007] For example, a first mating surface is formed on the end of the second shaft segment away from the connecting protrusion, and a second mating surface is provided on the output shaft. The first mating surface and the second mating surface mate to form a mating shaft segment. This arrangement can effectively transmit torque output by the output shaft to the second shaft segment, and has a simple structure and is easy to manufacture.

[0008] For example, the coupling has a first length L1, and the mating shaft segment has a second length L2, where L1 ≥ L2. This arrangement effectively enhances the secure connection between the coupling and the mating shaft segment, preventing the output shaft and the second shaft segment from dislodging from the coupling, ensuring the safety of the wind turbine during operation and improving the user experience.

[0009] For example, the coupling has a first connecting end face and a second connecting end face, the first connecting end face and the second connecting end face being disposed opposite each other. A connecting through-hole extends through the coupling from the first connecting end face toward the second connecting end face, and the mating shaft segment is disposed within the connecting through-hole. This arrangement ensures that the second shaft segment is coaxial with the output shaft, effectively transmitting torque output by the output shaft to the second shaft segment and ensuring a secure connection between the second shaft segment and the output shaft. Furthermore, the structure is simple and easy to manufacture.

[0010] For example, the impeller assembly has a plurality of blades, which are connected to the wheel disc in an annular shape to form a blade ring. A through hole is provided on the wheel disc, and the center of the through hole and the center of the blade ring meet the concentric condition. The first shaft segment is provided through the through hole, and the wheel disc is provided with a plurality of latching parts around the through hole. The connecting protrusion is provided with a plurality of latching fitting parts, and the plurality of latching fitting parts are respectively corresponding to and latched with the plurality of latching parts. In this way, by providing the first shaft segment through the through hole, the connection between the impeller assembly and the motor assembly is achieved through the connecting piece, and the plurality of latching fitting parts are respectively corresponding to and latched with the plurality of latching parts, which further enhances the connection stability between the impeller assembly and the motor assembly, avoids the problems of large noise and abnormal sound when the diameter of the blade ring is large or the rotation speed of the blade ring is fast, and improves the service life of the impeller assembly.

[0011] For example, a roulette wheel includes a wheel body and a connecting seat disposed on one side of the wheel body. A hole is provided through the wheel body and the connecting seat, and a plurality of latches are disposed on the connecting seat. This arrangement connects the connector to the wheel body via the connecting seat, making it easy to clean or replace the connecting seat, reducing maintenance costs. Furthermore, the presence of multiple latches effectively distributes the applied force across each latch, preventing damage to a single latch due to excessive force, thereby improving the user experience.

[0012] For example, the connecting seat has a distal end surface away from the disc body, the contact end surface is in contact with the distal end surface, the latch portion is configured as a protrusion protruding from the distal end surface in a direction away from the disc body, and the latch-fitting portion is configured as a groove recessed from the contact end surface in a direction away from the first shaft segment; or the latch portion is configured as a groove recessed from the distal end surface in a direction toward the disc body, and the latch-fitting portion is configured as a protrusion protruding from the contact end surface in a direction toward the first shaft segment. In this arrangement, the contact end surface and the distal end surface are in contact, effectively enhancing the stability of the connection between the impeller assembly and the motor assembly via the connector. The latch portion and the latch-fitting portion are configured as a protrusion and a groove, ensuring a secure connection between the latch portion and the latch-fitting portion, while maintaining a simple structure and ease of processing.

[0013] For example, one end of the first shaft segment, distal from the connecting protrusion, extends beyond the through-hole to form an external connecting segment, which is threadedly connected to a locking member. This arrangement allows the locking member threadedly connected to the external connecting segment to further limit the axial position of the impeller assembly, thereby enhancing the stability of the connection between the impeller assembly and the connecting member, effectively preventing the latching portion and the latching mating portion from disengaging from each other, and achieving a simple and easy-to-operate structure.

[0014] For example, a handle is protruded from the outer surface of the locking member. In this way, the locking member can be disassembled and assembled through the handle, which saves effort and is convenient for the user to operate. The structure is simple and easy to process, thereby improving the user experience.

[0015] According to another aspect of the present invention, a range hood is provided, comprising a housing and the aforementioned fan, the fan being disposed within the housing. Since the aforementioned fan has the aforementioned beneficial effects, a range hood including the aforementioned fan also has the aforementioned beneficial effects, which will not be described in detail herein.

[0016] The Summary of the Utility Model introduces a series of simplified concepts, which will be further described in detail in the Detailed Description of the Utility Model. This Summary of the Utility Model does not intend to limit the key features and essential technical features of the claimed technical solution, nor does it intend to determine the scope of protection of the claimed technical solution.

[0017] The advantages and features of the present invention are described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following drawings of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0019] Figure 1 A cross-sectional view of a fan according to an exemplary embodiment of the present invention;

[0020] Figure 2 A cross-sectional view of a fan according to another exemplary embodiment of the present invention;

[0021] Figure 3 for Figure 2 Exploded view of the impeller assembly in Figure 1;

[0022] Figure 4 for Figure 3 A three-dimensional diagram of the connecting seat in FIG.

[0023] Figure 5 for Figure 2 The main view of the connector in

[0024] Figure 6 for Figure 2 A perspective view of the connecting member in FIG.

[0025] Figure 7 for Figure 2 The main view of the motor assembly in FIG;

[0026] Figure 8 for Figure 2 The main view of the coupling in FIG;

[0027] Figure 9 for Figure 2 Left side view of the coupling in FIG;

[0028] Figure 10 for Figure 2 A three-dimensional view of the locking member in FIG;

[0029] Figure 11 for Figure 2 A cross-sectional view of the locking member in FIG.

[0030] The above drawings include the following reference numerals:

[0031] 1. Fan; 10. Impeller assembly; 110. Blade ring; 111. Disc; 1111. Disc body; 1112. Connecting seat; 1112a. Distal end surface; 1113. Clamping portion; 1114. Through hole; 1115. First annular portion; 1116. Arc portion; 1117. First circle; 112. Blades; 113. Chassis; 114. Top plate; 20. Motor assembly; 210. Output shaft; 211. Second mating surface; 30. Connector; 310. Shaft; 311. First shaft segment; 3111. External connecting segment; 3111a. External thread; 312. Second shaft segment; 3121. First mating surface ; 320, connecting protrusion; 321, contact end face; 322, latching fitting portion; 323, connecting portion; 324, second circle; 325, second annular portion; 40, coupling; 410, first connecting end face; 420, second connecting end face; 430, connecting through hole; 440, clamping shell; 450, gap; 460, fastener; 470, first fitting surface; 480, second fitting surface; 50, fitting shaft section; 60, locking member; 610, holding portion; 620, internal thread; 630, top wall; 640, side wall; D1, first diameter; D2, aperture; D3, third diameter; D4, fourth diameter. DETAILED DESCRIPTION

[0032] In the following description, numerous details are provided to facilitate a thorough understanding of the present invention. However, those skilled in the art will appreciate that the following description merely illustrates preferred embodiments of the present invention, and that the present invention may be practiced without one or more of these details. Furthermore, to avoid confusion with the present invention, some technical features well known in the art have not been described in detail.

[0033] To thoroughly understand the embodiments of the present invention, a detailed structure will be provided in the following description. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other embodiments.

[0034] An embodiment of the present invention provides a fan. The fan provided by the present invention can be used in a range hood. The following describes a fan according to an embodiment of the present invention in detail with reference to the accompanying drawings.

[0035] See also Figures 1 to 9The fan 1 may include an impeller assembly 10, a motor assembly 20 and a connector 30. The impeller assembly 10 may have a wheel disc 111. The motor assembly 20 may have an output shaft 210. The connector 30 may have a shaft portion 310 and a connecting protrusion 320. The connecting protrusion 320 may protrude radially outward from the outer edge of the shaft portion 310 and may divide the shaft portion 310 into a first shaft segment 311 and a second shaft segment 312. The wheel disc 111 may be sleeved on the first shaft segment 311. The end of the second shaft segment 312 away from the connecting protrusion 320 may be connected to the output shaft 210 through a coupling 40. In the longitudinal direction of the shaft portion 310, the connecting protrusion 320 may have a contact end surface 321 that fits with the wheel disc 111.

[0036] The fan 1 of the present invention, through the provision of the connecting member 30, not only realizes the connection between the impeller 111 and the output shaft 210, but also the connecting protrusion 320 forms a surface contact with the impeller 111 through the contact end face 321, thereby enhancing the connection stability between the impeller 111 and the output shaft 210 (that is, enhancing the connection stability between the impeller assembly 10 and the motor assembly 20), and avoiding problems such as large noise and abnormal sound generated when the impeller assembly 10 has a large diameter or a fast rotation speed.

[0037] See also Figures 1 to 7 , a first mating surface 3121 may be formed on the end of the second shaft segment 312 away from the connecting protrusion 320. A second mating surface 211 may be provided on the output shaft 210. The first mating surface 3121 and the second mating surface 211 may be fitted together to form a mating shaft segment 50. In this way, the torque output by the output shaft 210 can be effectively transmitted to the second shaft segment 312, and the structure is simple and easy to process. Specifically, the first mating surface 3121 can be formed by a milling process. The second mating surface 211 can also be formed by a milling process. The first mating surface 3121 can be in an "L" shape, and the second mating surface 211 can be in an inverted "L" shape that matches the first mating surface 3121. Of course, the first mating surface 3121 and the second mating surface 211 can also be in other shapes, for example, the first mating surface 3121 can be in a "concave" shape, and the second mating surface 211 can be in a "convex" shape that matches the first mating surface 3121.

[0038] See also Figure 1 、 Figure 2 、 Figure 6 and Figure 7 The coupling 40 can have a first length L1. The mating shaft segment 50 can have a second length L2. L1 ≥ L2. When L1 = L2, cost savings are achieved. When L1 > L2, the connection between the coupling 40 and the mating shaft segment 50 is effectively strengthened, preventing the output shaft 210 and the second shaft segment 312 from being dislodged from the coupling 40. This ensures the safety of the fan 1 during operation and improves the user experience.

[0039] Again, refer to Figure 1 、 Figure 2 、 Figure 5 、 Figure 6 and Figure 7 The coupling 40 may have a first connecting end face 410 and a second connecting end face 420. The first connecting end face 410 may be arranged opposite the second connecting end face 420. A connecting through-hole 430 may extend through the coupling 40 from the first connecting end face 410 toward the second connecting end face 420. The mating shaft segment 50 may be inserted into the connecting through-hole 430. In this way, the second shaft segment 312 is coaxially arranged with the output shaft 210, and the torque output by the output shaft 210 can be effectively transmitted to the second shaft segment 312. The connection between the second shaft segment 312 and the output shaft 210 is also firmly secured. At the same time, the structure is simple and easy to process.

[0040] Specifically, the coupling 40 may include a clamping shell 440 and a fastener 460. A gap 450 is axially provided on the clamping shell 440 to form a first mating surface 470 and a second mating surface 480. The fastener 460 is disposed on the clamping shell 440 and passes through the gap 450. Tightening the fastener 460 may bring the first mating surface 470 and the second mating surface 480 closer to each other, thereby achieving clamping of the clamping shell 440 on the mating shaft segment 50, and then transmitting torque by relying on the friction between the inner surface of the clamping shell 440 and the outer surface of the mating shaft segment 50. Loosening the fastener 460 may move the first mating surface 470 and the second mating surface 480 away from each other, thereby achieving detachment of the mating shaft segment 50 from the clamping shell 440. The fastener 460 may be a bolt or a screw, etc.

[0041] In some embodiments, the coupling 40 in the present invention may include but is not limited to a flange coupling, a clamp coupling, a gear coupling, a safety coupling or a diaphragm coupling.

[0042] See also Figures 1 to 7The impeller assembly 10 may have a plurality of blades 112. The plurality of blades 112 may be connected to the wheel disc 111 in a ring shape to form a blade ring 110. A through hole 1114 may be provided on the wheel disc 111. The center of the through hole 1114 may be concentric with the center of the blade ring 110. The first shaft segment 311 may be passed through the through hole 1114. A plurality of latching portions 1113 may be provided around the through hole 1114 on the wheel disc 111. A plurality of latching fitting portions 322 may be provided on the connecting protrusion 320. The plurality of latching fitting portions 322 may be latched with the plurality of latching portions 1113 in a one-to-one correspondence. By passing the first shaft segment 311 through the penetration hole 1114, the impeller assembly 10 is connected to the motor assembly 20 through the connecting member 30, and the multiple latching fitting portions 322 are respectively latched with the multiple latching portions 1113, thereby further enhancing the connection stability between the impeller assembly 10 and the motor assembly 20, avoiding problems such as large noise and abnormal sound generated when the diameter of the blade ring 110 is large or the rotation speed of the blade ring 110 is fast, and improving the service life of the impeller assembly 10.

[0043] Specifically, a plurality of latching portions 1113 can be evenly spaced along the circumferential direction of the wheel disc 111, and a plurality of latching mating portions 322 can be evenly spaced along the circumferential direction of the connecting protrusion 320. The latching portions 1113 can be 3, 6, 8, etc. The latching portions 1113 can be an integrally formed structure with the wheel disc 111. Of course, the latching portions 1113 can also be a separate structure with the wheel disc 111. The latching portions 1113 and the wheel disc 111 can be connected as a whole by welding, gluing, etc. The number of latching mating portions 322 can also be 3, 6, 8, etc. There are multiple latch parts 1113 and latch matching parts 322, which can disperse the force and prevent a single latch part 1113 or latch matching part 322 from being subjected to excessive force and being easily damaged. In addition, multiple latch parts 1113 are evenly spaced along the circumferential direction of the wheel disc 111, and multiple latch matching parts 322 can be evenly spaced along the circumferential direction of the connecting protrusion 320, which can effectively disperse the force evenly on each latch part 1113 and latch matching part 322, further avoiding the situation where a single latch part 1113 or latch matching part 322 is subjected to excessive force and is easily damaged.

[0044] See also Figures 1 to 3, the wheel disc 111 can be connected to the middle part of the blade ring 110. Understandably, at this time, the disk body 1111 can be a middle disk. In this way, it can be applied to situations where a large air volume is required and the length of the blade 112 is relatively long. By connecting the wheel disc 111 to the middle part of the blade ring 110, the structural strength of the blade ring 110 is higher, and the blade 112 is prevented from being easily damaged. Of course, it is also applicable to situations where two blade rings 110 are connected through the disk body 1111. Specifically, the impeller assembly 10 can also include a bottom plate 113 and a top plate 114. The bottom plate 113 and the top plate 114 can be respectively connected to the two ends of the blade ring 110. In this way, the structural strength of the blade ring 110 is further improved.

[0045] In an embodiment not shown in the figures, the wheel disc 111 can be connected to one end of the blade ring 110. It is understood that in this case, the wheel disc 111 can be a bottom plate 113 or a top plate 114, connected to the end of the blade ring 110. This is suitable for installation in a small space of the impeller assembly 10 and for situations where the blades 112 are relatively short. Connecting the wheel disc 111 to one end of the blade ring 110 not only facilitates assembly and disassembly of the wheel disc 111, facilitating user maintenance and cleaning of the wheel disc 111, but also saves costs. Of course, this also applies to situations where the blades 112 are relatively short.

[0046] See also Figures 1 to 4 The roulette wheel 111 may include a disc body 1111 and a connecting seat 1112 provided on one side of the disc body 1111. A through hole 1114 may pass through the disc body 1111 and the connecting seat 1112. A plurality of latching portions 1113 may be provided on the connecting seat 1112. The connector 30 and the disc body 1111 are connected by the connecting seat 1112, which makes it easy to clean or replace the connecting seat 1112, thereby reducing maintenance costs. Moreover, since there are a plurality of latching portions 1113, the force can be effectively dispersed on each latching portion 1113, thereby avoiding the situation where a single latching portion 1113 is subjected to excessive force, resulting in the latching portion 1113 being easily damaged, thereby improving the user experience. Specifically, the disc body 1111 and the connecting seat 1112 may be fixedly connected by rivet riveting. The use of rivets has the advantages of simple process, high reliability and easy disassembly, and it will not be affected by mechanical vibrations and other factors that may cause loosening. Of course, the disc body 1111 and the connecting seat 1112 can also be connected by welding, bolt connection, etc.

[0047] In some embodiments, in conjunction with Figure 1 、 Figure 3 and Figure 4The connection base 1112 may further include a plurality of arcuate portions 1116 around the through hole 1114. Each arcuate portion 1116 may be connected between two adjacent latch portions 1113, and the plurality of arcuate portions 1116 may be formed on the same first circle 1117. The first circle 1117 may be concentric with the through hole 1114. This enhances the structural strength of the latch portion 1113 and increases the mounting contact area of ​​the latch portion 1113, thereby further strengthening the connection stability between the impeller assembly 10 and the connector 30.

[0048] Furthermore, the first circle 1117 may have a first diameter D1, and the through hole 1114 may have an aperture D2, where D1 ≥ D2. When D1 = D2, it is easy to process and manufacture, saving costs. When D1 > D2, the structural strength of the latch portion 1113 is effectively enhanced, while the installation contact area is effectively increased, further strengthening the connection stability between the impeller assembly 10 and the connector 30, and reducing the noise or abnormal sound generated during rotation. It is understandable that when D1 = D2, the first circle 1117 may be the through hole 1114, and when D1 > D2, a first annular portion 1115 may be formed between the arc portion 1116 and the through hole 1114.

[0049] See also Figures 1 to 7 The connecting seat 1112 may have a distal surface 1112 a away from the disk body 1111 .

[0050] In some embodiments, as Figure 4 , D1>D2, and the latch portion 1113 and the first annular portion 1115 can both be grooves. In this case, the latch portion 1113 and the first annular portion 1115 can be recessed from the distal end surface 1112a toward the disk body 1111.

[0051] In some embodiments, D1>D2, and the latch portion 1113 and the first annular portion 1115 can both be protrusions. In this case, the latch portion 1113, the first annular portion 1115, and the connecting seat 1112 can be an integrally formed structure, and the latch portion 1113 and the first annular portion 1115 can be formed by protruding from the distal end surface 1112a in a direction away from the disk body 1111. Of course, it is not ruled out that at least two of the latch portion 1113, the first annular portion 1115, and the connecting seat 1112 can be split structures. When at least two of the latch portion 1113, the first annular portion 1115, and the connecting seat 1112 are split structures, they can be connected into one by welding, gluing, or other connection methods.

[0052] In some embodiments, D1>D2, and one of the latch portion 1113 and the first annular portion 1115 may be a protrusion, while the other may be a groove. In this case, the groove may be formed by being recessed from the distal end surface 1112a toward the disk body 1111, and the protrusion may be formed by protruding from the distal end surface 1112a away from the disk body 1111. The protrusion may be integral with the connector 1112. Of course, the protrusion may also be a separate structure from the connector 1112, connected to the connector 1112 by welding, gluing, or other connection methods.

[0053] In some embodiments, in the radial direction, the relationship between the latch portion 1113 , the first annular portion 1115 and the connecting seat 1112 may be such that the total length of the latch portion 1113 and the first diameter D1 is less than or equal to the length of the connecting seat 1112 .

[0054] In an embodiment not shown, D1=D2, and the connecting base 1112 may only have a latch portion 1113, which may be a protrusion or a groove. When the latch portion 1113 is a groove, the latch portion 1113 may be recessed from the distal end surface 1112a toward the disk body 1111. When the latch portion 1113 is a protrusion, the latch portion 1113 may be an integrally formed structure with the connecting base 1112, and the latch portion 1113 may be protruded from the distal end surface 1112a away from the disk body 1111. Of course, the latch portion 1113 may also be a separate structure from the connecting base 1112, and be connected to the connecting base 1112 as a whole by welding, gluing, or other connection methods.

[0055] In some embodiments, in the radial direction, the relationship between the latch portion 1113 , the through hole 1114 and the connecting seat 1112 may be such that the total length of the latch portion 1113 and the hole diameter D2 is less than or equal to the length of the connecting seat 1112 .

[0056] In some embodiments, the latch portion 1113 may directly protrude radially outward from the outer edge of the connecting seat 1112 .

[0057] In some embodiments, the latch portion 1113 described above may also be provided on the disk body 1111 .

[0058] See also Figure 1 、 Figure 4 and Figure 5 The connecting protrusion 320 may have a third diameter D3. The first shaft segment 311 may have a fourth diameter D4, where D3>D4.

[0059] In some embodiments, the latching portion 322 may be a protrusion or a groove. If the latching portion 322 is a protrusion, it may protrude from the contact end surface 321 toward the first shaft segment 311. If the latching portion 322 is a groove, it may be recessed from the contact end surface 321 away from the first shaft segment 311.

[0060] In some embodiments, in the radial direction, the relationship between the locking portion 322 , the connecting protrusion 320 and the first shaft segment 311 may be such that the total length of the locking portion 322 and the fourth diameter D4 is less than or equal to the third diameter D3 .

[0061] In some embodiments, the connecting protrusion 320 may further include multiple connecting portions 323 around the first shaft segment 311. Each connecting portion 323 may be connected between two adjacent engaging portions 322, and the multiple connecting portions 323 may be formed on the same second circle 324. The second circle 324 may be concentric with the second shaft segment 312. It is understood that the diameter of the connecting portion 323 may be greater than the diameter of the first shaft segment 311, forming a second annular portion 325 between the connecting portion 323 and the first shaft segment 311.

[0062] For example, the latch fitting portion 322 and the second annular portion 325 may both be grooves. In this case, the latch fitting portion 322 and the second annular portion 325 may be recessed from the contact end surface 321 in a direction away from the first shaft segment 311 .

[0063] For example, the latching portion 322 and the second annular portion 325 can both be protrusions. In this case, the latching portion 322, the second annular portion 325, and the connecting protrusion 320 can be an integrally formed structure, with the latching portion 322 and the second annular portion 325 protruding from the contact end surface 321 toward the first shaft segment 311. Of course, it is not ruled out that at least two of the latching portion 322, the second annular portion 325, and the connecting protrusion 320 can be separate structures. If at least two of the latching portion 322, the second annular portion 325, and the connecting protrusion 320 are separate structures, they can be connected into one piece through welding, gluing, or other connection methods.

[0064] For example, one of the latching portion 322 and the second annular portion 325 may be a protrusion, and the other may be a groove. In this case, the groove may be formed as a depression from the contact end surface 321 away from the first shaft segment 311, and the protrusion may be formed as a protrusion from the contact end surface 321 toward the first shaft segment 311. The protrusion may be integral with the connecting protrusion 320. Alternatively, the protrusion may be separate from the connecting protrusion 320 and integrally connected to the connecting protrusion 320 via welding, gluing, or other methods.

[0065] In some embodiments, in the radial direction, the relationship between the latching fitting portion 322, the second annular portion 325 and the connecting protrusion 320 can be: the total length of the latching fitting portion 322 and the diameter of the second circle 324 where the second annular portion 325 is located is less than or equal to the third diameter D3.

[0066] In some embodiments, as Figure 1 As shown, the latching portion 322 can directly protrude radially outward from the outer edge of the connecting protrusion 320. The latching portion 322 and the connecting protrusion 320 are integrally formed. Of course, the latching portion 322 and the connecting protrusion 320 can also be separate structures. The latching portion 322 and the connecting protrusion 320 can be connected to form a whole by welding, gluing, etc.

[0067] It should be noted that the output shaft 210 can be connected to any one of the wheel discs 111 in the above-mentioned embodiments through any one of the connecting members 30 in the above-mentioned embodiments.

[0068] In some embodiments, when the output shaft 210 is connected to the impeller 111 via the connector 30, the contact end surface 321 can be aligned with the distal end surface 1112a. Thus, the connector 30 forms surface contact with the impeller 111, effectively enhancing the stability of the connection between the impeller assembly 10 and the motor assembly 20 via the connector 30.

[0069] For example, the latch portion 1113 can be configured as a protrusion protruding from the distal end surface 1112a in a direction away from the disk body 1111, while the latch engaging portion 322 can be configured as a groove recessed from the contact end surface 321 in a direction away from the first shaft segment 311. In this manner, the latch portion 1113 and the latch engaging portion 322 are configured as a protrusion and a groove, ensuring a secure connection between the latch portion 1113 and the latch engaging portion 322 while maintaining a simple structure and ease of processing.

[0070] For example, the latch portion 1113 can be configured as a groove that is recessed from the distal end surface 1112a toward the disk body 1111, and the latch-engaging portion 322 can be configured as a bump that protrudes from the contact end surface 321 toward the first shaft segment 311. Thus, the latch portion 1113 and the latch-engaging portion 322 are configured as a bump and a groove, ensuring a secure connection between the latch portion 1113 and the latch-engaging portion 322 while maintaining a simple structure and ease of processing.

[0071] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 10 and Figure 11, one end of the first shaft section 311 away from the connecting protrusion 320 can extend outside the penetration hole 1114 to form an external section 3111. A locking member 60 can be threadedly connected to the external section 3111. The threaded connection is not only easy to process and easy for the user to disassemble, but also has the characteristics of high connection firmness. Specifically, an external thread 3111a can be provided on the external section 3111, and an internal thread 620 can be provided on the locking member 60. It can be understood that providing an external thread 3111a on the external section 3111 is easier to process than providing an internal thread 620, and providing an external thread 3111a on the external section 3111 better ensures the structural strength of the external section 3111. Of course, it is also possible to provide an internal thread 620 on the external section 3111 and an external thread 3111a on the locking member 60. The locking member 60 threadedly connected to the external section 3111 further limits the axial position of the impeller assembly 10, thereby enhancing the stability of the connection between the impeller assembly 10 and the connector 30, effectively preventing the latch portion 1113 and the latch engagement portion 322 from disengaging from each other, and having a simple structure that is easy to operate. Of course, the external section 3111 and the locking member 60 can also be connected using other structures.

[0072] See also Figure 1 、 Figure 2 、 Figure 10 and Figure 11 , a holding portion 610 may protrude from the outer surface of the locking member 60. The holding portion 610 may be formed by protruding outward from the top wall 630 of the locking member 60. Specifically, the holding portion 610 may be a rectangular parallelepiped, which has high structural strength and is easy to process, and is convenient for the user to grasp and twist. Of course, the holding portion 610 may also be in other shapes, such as a sphere, a cylinder, etc. The holding portion 610 may also be formed by protruding outward from the side wall 640 of the locking member 60. The locking member 60 is disassembled and assembled by the holding portion 610, which saves effort and is convenient for the user to operate, and the structure is simple and easy to process, thereby improving the user's experience.

[0073] According to another aspect of the present invention, a range hood is provided, comprising a housing (not shown) and the aforementioned fan 1, disposed within the housing. Since the aforementioned fan 1 has the aforementioned beneficial effects, a range hood including the aforementioned fan 1 also has the aforementioned beneficial effects, which will not be further elaborated herein.

[0074] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front", "back", "up", "down", "left", "right", "horizontal", "vertical", "vertical", "horizontal", "top", "bottom", etc. are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside" and "outside" refer to the inside and outside relative to the outline of each component itself.

[0075] For ease of description, area-relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the regional positional relationship between one or more components or features shown in the figures and other components or features. It should be understood that area-relative terms include not only the orientation of the components as described in the figures, but also different orientations in use or operation. For example, if the components in the drawings are inverted as a whole, the situation where the components are "above other components or features" or "above other components or features" will include the situation where the components are "below other components or structures" or "below other components or structures". Thus, the exemplary term "above" may include both the orientations "above" and "below". In addition, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this document is intended to include all of these situations.

[0076] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, parts, components and / or combinations thereof.

[0077] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0078] The present invention has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative and illustrative purposes only and are not intended to limit the present invention to the described embodiments. Furthermore, those skilled in the art will appreciate that the present invention is not limited to the above embodiments and that various variations and modifications may be made based on the teachings of the present invention, all of which fall within the scope of the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fan, characterized in that: include: an impeller assembly having a wheel disc; a motor assembly having an output shaft; as well as a connecting member, the connecting member comprising a shaft portion and a connecting protrusion, the connecting protrusion protruding radially outward from an outer edge of the shaft portion and dividing the shaft portion into a first shaft segment and a second shaft segment, the wheel disc being sleeved on the first shaft segment, and an end of the second shaft segment away from the connecting protrusion being connected to the output shaft via a coupling; Wherein, in the length direction of the shaft portion, the connecting protrusion has a contact end surface that fits with the wheel disc.

2. The fan according to claim 1, characterized in that A first mating surface is formed on one end of the second shaft segment away from the connecting protrusion, and a second mating surface is provided on the output shaft. The first mating surface and the second mating surface are fitted together to form a mating shaft segment.

3. The fan according to claim 2, characterized in that The coupling has a first length L1, and the mating shaft segment has a second length L2, where L1 ≥ L2.

4. The fan according to claim 3, characterized in that The coupling has a first connecting end face and a second connecting end face, the first connecting end face is arranged opposite to the second connecting end face, the coupling has a connecting through hole extending from the first connecting end face toward the second connecting end face, and the mating shaft segment is inserted into the connecting through hole.

5. The fan according to claim 1, characterized in that The impeller assembly has multiple blades, and the multiple blades are connected to the wheel disc in a ring shape to form a blade ring. A through hole is opened on the wheel disc, and the center of the through hole and the center of the blade ring meet the concentric condition. The first shaft segment is passed through the through hole, and the wheel disc is provided with multiple latching parts around the through hole. The connecting protrusion is provided with multiple latching fitting parts, and the multiple latching fitting parts are respectively corresponding to the multiple latching parts and latched.

6. The fan according to claim 5, characterized in that The wheel disc includes a disc body and a connecting seat arranged on one side of the disc body, the through hole passes through the disc body and the connecting seat, and a plurality of the latching parts are arranged on the connecting seat.

7. The fan according to claim 6, characterized in that The connecting seat has a distal surface away from the disk body, the contact end surface is in contact with the distal surface, the latch portion is configured as a protrusion protruding from the distal surface in the direction away from the disk body, and the latch fitting portion is configured as a groove recessed from the contact end surface in the direction away from the first axis segment; or the latch portion is configured as a groove recessed from the distal surface in the direction of the disk body, and the latch fitting portion is configured as a protrusion protruding from the contact end surface in the direction of the first axis segment.

8. The fan according to claim 5, characterized in that One end of the first shaft segment away from the connecting protrusion extends out of the penetration hole to form an external connection segment, and a locking piece is threadedly connected to the external connection segment.

9. The fan according to claim 8, characterized in that A holding portion protrudes from the outer surface of the locking piece.

10. A range hood, characterized in that: The invention comprises a box body and a fan as claimed in any one of claims 1 to 9, wherein the fan is arranged inside the box body.

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