Fan structure and household appliance

Abstract

The invention relates to a fan structure and a household appliance, and relates to the technical field of household appliances. The fan structure comprises a motor, a wind wheel and a connecting assembly. The motor comprises a motor body and an output shaft arranged on the motor body; the wind wheel is arranged on the output shaft in a sleeving mode, a limiting assembly is arranged on the side, away from the motor body, of the wind wheel, and the limiting assembly surrounds the output shaft. The connecting assembly is arranged on the output shaft and located on the side, away from the motor body, of the limiting assembly, and the connecting assembly is matched with the limiting assembly so that the wind wheel can be fixed to the output shaft. According to the technical scheme, the problems that when an existing wind wheel and a motor are installed, a sight blind area exists, the wind wheel and the motor are in a blind installation state, installation is difficult, and installation is not reliable can be solved.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, and particularly to a fan structure and a household appliance. Background Technology

[0002] Household appliances refer to various electrical and electronic appliances used in homes and similar places. They have become necessities in modern family life. Centrifugal fans are an important component of household appliances such as range hoods. A centrifugal fan includes a motor and a centrifugal impeller mounted on the motor's output shaft. In some cases, a fixing pin is installed on the motor's output shaft, and the mounting hole of the centrifugal impeller that mates with the output shaft has a groove corresponding to the fixing pin. However, because the groove is located at the bottom of the centrifugal impeller during installation, it is in a blind spot, making it difficult to align the groove with the fixing pin. This not only increases installation difficulty but also increases the risk of improper installation, leading to potential risks during centrifugal fan operation. Summary of the Invention

[0003] This invention provides a fan structure and a household appliance that can solve the problem of blind spots in the installation of existing wind turbines and motors, which causes the wind turbines and motors to be installed blindly, resulting in difficult and unreliable installation.

[0004] In a first aspect, embodiments of the present invention provide a fan structure, comprising:

[0005] An electric motor, including a motor body and an output shaft disposed on the motor body;

[0006] A fan wheel, sleeved on the output shaft, has a limiting component on the side of the fan wheel opposite to the motor body, and the limiting component surrounds the output shaft; and

[0007] A connecting component is disposed on the output shaft and located on the side of the limiting component away from the motor body. The connecting component cooperates with the limiting component to fix the impeller on the output shaft.

[0008] In one embodiment, the limiting component includes:

[0009] A bushing, fitted onto the output shaft; and

[0010] Multiple limiting grooves are provided at one end of the bushing away from the motor body and extend along the axial direction. The multiple limiting grooves are arranged circumferentially around the bushing and the limiting grooves penetrate the bushing in the radial direction.

[0011] In one embodiment, the connection component includes:

[0012] A connector adapted to the output shaft;

[0013] Multiple limiting blocks are disposed on the outer wall of the connector, the multiple limiting blocks are arranged circumferentially around the connector, and each of the multiple limiting blocks corresponds one-to-one with a multiple limiting groove, the limiting blocks being adapted to the corresponding limiting grooves; and

[0014] A knob is connected to the output shaft, and the knob abuts against the end of the connector away from the bushing.

[0015] In one embodiment, a first limiting surface is provided on the side wall of the limiting groove, and the first limiting surface has a preset angle with the axial direction so that the width of the limiting groove gradually decreases along the axial direction.

[0016] The side wall of the limiting block is provided with a second limiting surface, the second limiting surface has the preset angle with the axial direction, and the second limiting surface abuts against the first limiting surface.

[0017] In one embodiment, the preset included angle is 15°-30°.

[0018] In one embodiment, there is a gap between the bottom surface of the limiting groove and the bottom surface of the limiting block.

[0019] In one embodiment, the output shaft includes a positioning shaft segment, and a plurality of first positioning surfaces are provided on the side of the positioning shaft segment. The plurality of first positioning surfaces are arranged circumferentially around the positioning shaft segment, and the first positioning surfaces are parallel to the axial direction.

[0020] The connecting member is adapted to the positioning shaft segment.

[0021] In one embodiment, the connector is provided with a through hole, and a plurality of second positioning surfaces are provided on the inner wall of the through hole. The plurality of second positioning surfaces are arranged circumferentially around the through hole at intervals, and the plurality of second positioning surfaces correspond one-to-one with the plurality of first positioning surfaces; wherein, the second positioning surface is adapted to the corresponding first positioning surface.

[0022] In one embodiment, the output shaft further includes a fixed shaft section having a left-hand thread for threaded connection with the knob;

[0023] The motor drives the wind turbine to rotate clockwise.

[0024] In one embodiment, the fan structure further includes a volute, on which an air duct is provided and an air inlet and an air outlet respectively connected to the air duct;

[0025] The motor is mounted on the volute, and the impeller is located inside the air inlet, so that external airflow flows into the air duct and flows out through the air outlet.

[0026] Secondly, embodiments of the present invention provide a household appliance, including the fan structure as described above.

[0027] Compared with existing technologies, the advantages of this invention are that by placing the limiting component on the side of the impeller away from the motor body and surrounding the output shaft, and placing the connecting component on the side of the limiting component away from the motor body, the cooperation and installation process of the limiting component and the connecting component are all within the user's line of sight, avoiding blind spots caused by the impeller, motor, etc. during installation. Furthermore, when installing the impeller and motor, the impeller is first fitted onto the motor's output shaft, and then the connecting component is engaged with the limiting component and connected to the output shaft. This facilitates the installation of the impeller from top to bottom, making installation convenient and simple, and eliminating blind spots throughout the entire installation process. This effectively avoids blind installation, thereby improving installation reliability and reducing the reliability of improper installation, ensuring the installation effect. Attached Figure Description

[0028] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0029] Figure 1 This is an exploded view of a fan structure provided in an embodiment of the present invention;

[0030] Figure 2 yes Figure 1 A schematic diagram of the limiting component provided in the embodiment;

[0031] Figure 3 yes Figure 1 A schematic diagram of the connector provided in the embodiment;

[0032] Figure 4 yes Figure 1 An installation diagram of the connector and limiting assembly provided in the Chinese embodiment;

[0033] Figure 5 yes Figure 1 A cross-sectional view of the fan structure provided in the embodiment;

[0034] Figure 6 yes Figure 1 A cross-sectional view of the wind turbine structure provided in the Chinese embodiment from another perspective;

[0035] Figure 7 yes Figure 1 A cross-sectional view of the connecting component and the limiting component provided in the Chinese embodiment;

[0036] Figure 8 yes Figure 1 A three-dimensional structural diagram of the fan structure provided in the embodiment.

[0037] Figure label:

[0038] 10. Motor; 110. Output shaft; 1101. Positioning shaft section; 1102. First positioning surface; 1103. Fixed shaft section;

[0039] 20. Wind turbine; 210. Limiting assembly; 2101. Bushing; 2102. Limiting groove; 2103. First limiting surface; 220. Rotating shaft disk;

[0040] 30. Connecting component; 310. Connector; 3101. Through hole; 3102. Second positioning surface; 320. Limiting block; 3201. Second limiting surface; 330. Knob;

[0041] 40. Volute; 410. Air vent. Detailed Implementation

[0042] The invention will now be further described with reference to the accompanying drawings.

[0043] Household appliances refer to various electrical and electronic appliances used in homes and similar places. They have become necessities in modern family life. Centrifugal fans are an important component of household appliances such as range hoods. A centrifugal fan includes a motor and a centrifugal impeller mounted on the motor's output shaft. In some cases, a fixing pin is installed on the motor's output shaft, and the centrifugal impeller has a groove corresponding to the fixing pin on its mounting hole. During installation, the mounting hole of the centrifugal impeller is first fitted onto the motor's output shaft. Then, it is manually adjusted so that the groove on the centrifugal impeller aligns with the fixing pin on the motor's output shaft. After installation, the impeller is secured with the impeller knob. However, because the groove is located at the bottom of the centrifugal impeller during installation, it is in a blind spot, making it difficult to align the groove with the fixing pin. This not only increases the difficulty of installation but also increases the risk of improper installation, leading to potential risks during centrifugal fan operation.

[0044] Example 1

[0045] like Figure 1As shown, in order to solve the above-mentioned technical problems, the present invention provides a fan structure, including a motor 10, a fan wheel 20, and a connecting component 30; the motor 10 includes a motor body and an output shaft 110 disposed on the motor body; the fan wheel 20 is sleeved on the output shaft 110 of the motor 10, and a limiting component 210 is provided on the side of the fan wheel 20 away from the motor body, and the limiting component 210 surrounds the output shaft 110; the connecting component 30 is disposed on the output shaft 110 and located on the side of the limiting component 210 away from the motor body, and the connecting component 30 cooperates with the limiting component 210 to fix the fan wheel 20 on the output shaft 110.

[0046] As can be seen from the above, by placing the limiting component 210 on the side of the impeller 20 away from the motor body and surrounding the output shaft 110, and placing the connecting component 30 on the side of the limiting component 210 away from the motor body, the engagement and installation process of the limiting component 210 and the connecting component 30 are all within the user's line of sight, avoiding blind spots caused by the impeller 20, motor 10, etc. during installation. In addition, when installing the impeller 20 and motor 10, the impeller 20 is first fitted onto the output shaft 110, and then the connecting component 30 is engaged with the limiting component 210 and connected to the output shaft 110. This facilitates the installation of the impeller 20 from top to bottom, making installation convenient and simple, and eliminating blind spots throughout the entire installation process. This effectively avoids blind installation, thereby not only improving the reliability of the installation but also reducing the reliability of improper installation and ensuring the installation effect.

[0047] It should be noted that the impeller 20 includes an upper hub and a lower hub arranged opposite each other in the axial direction, and a fan blade disposed between the upper hub and the lower hub; the impeller 20 also includes a rotating disk 220 disposed on the lower hub, wherein the limiting component 210 is disposed on the rotating disk 220; in addition, the impeller 20 can be a centrifugal impeller 20, that is, an impeller 20 that takes in air axially and exits air radially, and uses centrifugal force (depending on the rotation speed and outer diameter) to do work to increase the air pressure.

[0048] Example 2

[0049] like Figure 1 As shown, the fan structure includes a motor 10, a fan wheel 20, and a connecting assembly 30. The motor 10 includes a motor body and an output shaft 110 disposed on the motor body. The fan wheel 20 is sleeved on the output shaft 110 of the motor 10. A limiting assembly 210 is provided on the side of the fan wheel 20 away from the motor body, and the limiting assembly 210 surrounds the output shaft 110. The connecting assembly 30 is disposed on the output shaft 110 and located on the side of the limiting assembly 210 away from the motor body. The connecting assembly 30 cooperates with the limiting assembly 210 to fix the fan wheel 20 on the output shaft 110.

[0050] As can be seen from the above, by placing the limiting component 210 on the side of the impeller 20 away from the motor body and surrounding the output shaft 110, and placing the connecting component 30 on the side of the limiting component 210 away from the motor body, the engagement and installation process of the limiting component 210 and the connecting component 30 are all within the user's line of sight, avoiding blind spots caused by the impeller 20, motor 10, etc. during installation. In addition, when installing the impeller 20 and motor 10, the impeller 20 is first fitted onto the output shaft 110, and then the connecting component 30 is engaged with the limiting component 210 and connected to the output shaft 110. This facilitates the installation of the impeller 20 from top to bottom, making installation convenient and simple, and eliminating blind spots throughout the entire installation process. This effectively avoids blind installation, thereby not only improving the reliability of the installation but also reducing the reliability of improper installation and ensuring the installation effect.

[0051] It should be noted that the impeller 20 includes an upper hub and a lower hub arranged opposite each other in the axial direction, and a fan blade disposed between the upper hub and the lower hub; the impeller 20 also includes a rotating disk 220 disposed on the lower hub, wherein the limiting component 210 is disposed on the rotating disk 220; in addition, the impeller 20 can be a centrifugal impeller 20, that is, an impeller 20 that takes in air axially and exits air radially, and uses centrifugal force (depending on the rotation speed and outer diameter) to do work to increase the air pressure.

[0052] like Figure 1 , Figure 2 As shown, in some embodiments, the limiting component 210 includes a bushing 2101 and a plurality of limiting grooves 2102; the bushing 2101 is sleeved on the output shaft 110; the plurality of limiting grooves 2102 are disposed at one end of the bushing 2101 away from the motor body and extend in the axial direction, the plurality of limiting grooves 2102 are arranged circumferentially around the bushing 2101 at intervals, and the limiting grooves 2102 penetrate the bushing 2101 in the radial direction.

[0053] By setting the bushing 2101 to provide a structural basis for the output shaft 110 to pass through, and setting multiple limiting grooves 2102 at the end of the bushing 2101 away from the motor body, it is ensured that there is no blind spot when the limiting grooves 2102 and the connecting component 30 are installed together. Compared with the prior art where the groove is set at the bottom of the centrifugal impeller 20, the present invention effectively avoids blind installation, thus making the installation simpler.

[0054] It should be noted that the number of limit slots 2102 can be set according to actual needs, such as... Figure 2 As shown, the number of limiting grooves 2102 can be four; in addition, multiple limiting grooves 2102 can be arranged at equal intervals around the bushing 2101 in the circumferential direction.

[0055] It should also be noted that the bushing 2101 is mounted on the rotating shaft disk 220, and the bushing 2101 and the rotating shaft disk 220 are connected by means of welding or integral molding.

[0056] like Figure 1 , Figures 3-6 As shown, in some embodiments, the connecting component 30 includes a connector 310, a plurality of limiting blocks 320, and a knob 330; the connector 310 is adapted to the output shaft 110; the plurality of limiting blocks 320 are disposed on the outer wall of the connector 310, the plurality of limiting blocks 320 are arranged circumferentially around the connector 310, and the plurality of limiting blocks 320 correspond one-to-one with the plurality of limiting grooves 2102, and the limiting blocks 320 are adapted to the corresponding limiting grooves 2102; the knob 330 is connected to the output shaft 110, and the knob 330 abuts against the end of the connector 310 away from the bushing 2101.

[0057] By engaging the limiting block 320 with the limiting groove 2102, the connector 310 and the limiting component 210 are quickly aligned and limited using a plug-in connection, making installation convenient and quick. The knob 330 is connected to the output shaft 110, and the knob 330 abuts against the end of the connector 310 away from the bushing 2101, achieving a reliable connection between the knob 330, the connector 310, and the limiting component 210. This securely mounts the impeller 20 onto the output shaft 110 of the motor 10 and transmits the power output from the motor 10 to the limiting component 210, causing the limiting component 210 and the impeller 20 to rotate.

[0058] It should be noted that the number of limit blocks 320 can be set according to actual needs, and the number of limit blocks 320 is equal to the number of limit slots 2102; for example, such as Figure 4 As shown, there are four limiting blocks 320 and four limiting grooves 2102; in addition, multiple limiting blocks 320 are arranged at equal intervals around the connector 310 in the circumferential direction.

[0059] It should also be noted that, such as Figure 4 As shown, the radial length of the limiting block 320 is greater than the radial length of the limiting groove 2102, and the axial length of the limiting block 320 is greater than the axial length of the limiting groove 2102, meaning the limiting block 320 is higher than the limiting groove 2102. This ensures that the knob 330 abuts against the connecting piece 310 and the limiting block 320, and that the limiting block 320 presses against the bushing 2101, further improving the reliability of the connection.

[0060] Example 3

[0061] like Figure 1As shown, the fan structure includes a motor 10, a fan wheel 20, and a connecting assembly 30. The motor 10 includes a motor body and an output shaft 110 disposed on the motor body. The fan wheel 20 is sleeved on the output shaft 110 of the motor 10. A limiting assembly 210 is provided on the side of the fan wheel 20 away from the motor body, and the limiting assembly 210 surrounds the output shaft 110. The connecting assembly 30 is disposed on the output shaft 110 and located on the side of the limiting assembly 210 away from the motor body. The connecting assembly 30 cooperates with the limiting assembly 210 to fix the fan wheel 20 on the output shaft 110.

[0062] As can be seen from the above, by placing the limiting component 210 on the side of the impeller 20 away from the motor body and surrounding the output shaft 110, and placing the connecting component 30 on the side of the limiting component 210 away from the motor body, the engagement and installation process of the limiting component 210 and the connecting component 30 are all within the user's line of sight, avoiding blind spots caused by the impeller 20, motor 10, etc. during installation. In addition, when installing the impeller 20 and motor 10, the impeller 20 is first fitted onto the output shaft 110, and then the connecting component 30 is engaged with the limiting component 210 and connected to the output shaft 110. This facilitates the installation of the impeller 20 from top to bottom, making installation convenient and simple, and eliminating blind spots throughout the entire installation process. This effectively avoids blind installation, thereby not only improving the reliability of the installation but also reducing the reliability of improper installation and ensuring the installation effect.

[0063] It should be noted that the impeller 20 includes an upper hub and a lower hub arranged opposite each other in the axial direction, and a fan blade disposed between the upper hub and the lower hub; the impeller 20 also includes a rotating disk 220 disposed on the lower hub, wherein the limiting component 210 is disposed on the rotating disk 220; in addition, the impeller 20 can be a centrifugal impeller 20, that is, an impeller 20 that takes in air axially and exits air radially, and uses centrifugal force (depending on the rotation speed and outer diameter) to do work to increase the air pressure.

[0064] like Figure 1 , Figure 2 As shown, in some embodiments, the limiting component 210 includes a bushing 2101 and a plurality of limiting grooves 2102; the bushing 2101 is sleeved on the output shaft 110; the plurality of limiting grooves 2102 are disposed at one end of the bushing 2101 away from the motor body and extend in the axial direction, the plurality of limiting grooves 2102 are arranged circumferentially around the bushing 2101 at intervals, and the limiting grooves 2102 penetrate the bushing 2101 in the radial direction.

[0065] By setting the bushing 2101 to provide a structural basis for the output shaft 110 to pass through, and setting multiple limiting grooves 2102 at the end of the bushing 2101 away from the motor body, it is ensured that there is no blind spot when the limiting grooves 2102 and the connecting component 30 are installed together. Compared with the prior art where the groove is set at the bottom of the centrifugal impeller 20, the present invention effectively avoids blind installation, thus making the installation simpler.

[0066] It should be noted that the number of limit slots 2102 can be set according to actual needs, such as... Figure 2 As shown, the number of limiting grooves 2102 can be four; in addition, multiple limiting grooves 2102 can be arranged at equal intervals around the bushing 2101 in the circumferential direction.

[0067] It should also be noted that the bushing 2101 is mounted on the rotating shaft disk 220, and the bushing 2101 and the rotating shaft disk 220 are connected by means of welding or integral molding.

[0068] like Figure 1 , Figures 3-6 As shown, in some embodiments, the connecting component 30 includes a connector 310, a plurality of limiting blocks 320, and a knob 330; the connector 310 is adapted to the output shaft 110; the plurality of limiting blocks 320 are disposed on the outer wall of the connector 310, the plurality of limiting blocks 320 are arranged circumferentially around the connector 310, and the plurality of limiting blocks 320 correspond one-to-one with the plurality of limiting grooves 2102, and the limiting blocks 320 are adapted to the corresponding limiting grooves 2102; the knob 330 is connected to the output shaft 110, and the knob 330 abuts against the end of the connector 310 away from the bushing 2101.

[0069] By engaging the limiting block 320 with the limiting groove 2102, the connector 310 and the limiting component 210 are quickly aligned and limited using a plug-in connection, making installation convenient and quick. The knob 330 is connected to the output shaft 110, and the knob 330 abuts against the end of the connector 310 away from the bushing 2101, achieving a reliable connection between the knob 330, the connector 310, and the limiting component 210. This securely mounts the impeller 20 onto the output shaft 110 of the motor 10 and transmits the power output from the motor 10 to the limiting component 210, causing the limiting component 210 and the impeller 20 to rotate.

[0070] It should be noted that the number of limit blocks 320 can be set according to actual needs, and the number of limit blocks 320 is equal to the number of limit slots 2102; for example, such as Figure 4 As shown, there are four limiting blocks 320 and four limiting grooves 2102; in addition, multiple limiting blocks 320 are arranged at equal intervals around the connector 310 in the circumferential direction.

[0071] It should also be noted that, such as Figure 4 As shown, the radial length of the limiting block 320 is greater than the radial length of the limiting groove 2102, and the axial length of the limiting block 320 is greater than the axial length of the limiting groove 2102, meaning the limiting block 320 is higher than the limiting groove 2102. This ensures that the knob 330 abuts against the connecting piece 310 and the limiting block 320, and that the limiting block 320 presses against the bushing 2101, further improving the reliability of the connection.

[0072] like Figure 2 , Figure 6 As shown, in some embodiments, a first limiting surface 2103 is provided on the side wall of the limiting groove 2102, and the first limiting surface 2103 has a preset angle with the axial direction so that the width of the limiting groove 2102 gradually decreases along the axial direction; a second limiting surface 3201 is provided on the side wall of the limiting block 320, and the second limiting surface 3201 has a preset angle with the axial direction, and the second limiting surface 3201 abuts against the first limiting surface 2103.

[0073] By setting the inclined first limiting surface 2103 and the second limiting surface 3201, it can not only play a guiding role during the installation process, making it easy for the limiting block 320 to be quickly aligned with the limiting groove 2102 and inserted, but also generate a pressing effect by utilizing the relative sliding of the first limiting surface 2103 and the second limiting surface 3201 during installation, so that the limiting block 320 presses the bushing 2101, thereby further improving the reliability of the connection between the connector 310 and the bushing 2101.

[0074] It should be noted that, as Figure 2 As shown, the sidewall of the limiting groove 2102 has a preset angle with the axial direction, thereby forming a first limiting surface 2103 on the sidewall of the entire limiting groove 2102; the sidewall of the limiting block 320 has a preset angle with the axial direction, thereby forming a second limiting surface 3201 on the sidewall of the entire limiting block 320. Additionally, as... Figure 4 As shown, each limiting groove 2102 has two first limiting surfaces 2103, and each limiting block 320 has two second limiting surfaces 3201, so that the limiting block 320 and the limiting groove 2102 have multiple limiting surfaces cooperating at the same time.

[0075] Example 4

[0076] like Figure 1As shown, the fan structure includes a motor 10, a fan wheel 20, and a connecting assembly 30. The motor 10 includes a motor body and an output shaft 110 disposed on the motor body. The fan wheel 20 is sleeved on the output shaft 110 of the motor 10. A limiting assembly 210 is provided on the side of the fan wheel 20 away from the motor body, and the limiting assembly 210 surrounds the output shaft 110. The connecting assembly 30 is disposed on the output shaft 110 and located on the side of the limiting assembly 210 away from the motor body. The connecting assembly 30 cooperates with the limiting assembly 210 to fix the fan wheel 20 on the output shaft 110.

[0077] As can be seen from the above, by placing the limiting component 210 on the side of the impeller 20 away from the motor body and surrounding the output shaft 110, and placing the connecting component 30 on the side of the limiting component 210 away from the motor body, the engagement and installation process of the limiting component 210 and the connecting component 30 are all within the user's line of sight, avoiding blind spots caused by the impeller 20, motor 10, etc. during installation. In addition, when installing the impeller 20 and motor 10, the impeller 20 is first fitted onto the output shaft 110, and then the connecting component 30 is engaged with the limiting component 210 and connected to the output shaft 110. This facilitates the installation of the impeller 20 from top to bottom, making installation convenient and simple, and eliminating blind spots throughout the entire installation process. This effectively avoids blind installation, thereby not only improving the reliability of the installation but also reducing the reliability of improper installation and ensuring the installation effect.

[0078] It should be noted that the impeller 20 includes an upper hub and a lower hub arranged opposite each other in the axial direction, and a fan blade disposed between the upper hub and the lower hub; the impeller 20 also includes a rotating disk 220 disposed on the lower hub, wherein the limiting component 210 is disposed on the rotating disk 220; in addition, the impeller 20 can be a centrifugal impeller 20, that is, an impeller 20 that takes in air axially and exits air radially, and uses centrifugal force (depending on the rotation speed and outer diameter) to do work to increase the air pressure.

[0079] like Figure 1 , Figure 2 As shown, in some embodiments, the limiting component 210 includes a bushing 2101 and a plurality of limiting grooves 2102; the bushing 2101 is sleeved on the output shaft 110; the plurality of limiting grooves 2102 are disposed at one end of the bushing 2101 away from the motor body and extend in the axial direction, the plurality of limiting grooves 2102 are arranged circumferentially around the bushing 2101 at intervals, and the limiting grooves 2102 penetrate the bushing 2101 in the radial direction.

[0080] By setting the bushing 2101 to provide a structural basis for the output shaft 110 to pass through, and setting multiple limiting grooves 2102 at the end of the bushing 2101 away from the motor body, it is ensured that there is no blind spot when the limiting grooves 2102 and the connecting component 30 are installed together. Compared with the prior art where the groove is set at the bottom of the centrifugal impeller 20, the present invention effectively avoids blind installation, thus making the installation simpler.

[0081] It should be noted that the number of limit slots 2102 can be set according to actual needs, such as... Figure 2 As shown, the number of limiting grooves 2102 can be four; in addition, multiple limiting grooves 2102 can be arranged at equal intervals around the bushing 2101 in the circumferential direction.

[0082] It should also be noted that the bushing 2101 is mounted on the rotating shaft disk 220, and the bushing 2101 and the rotating shaft disk 220 are connected by means of welding or integral molding.

[0083] like Figure 1 , Figures 3-6 As shown, in some embodiments, the connecting component 30 includes a connector 310, a plurality of limiting blocks 320, and a knob 330; the connector 310 is adapted to the output shaft 110; the plurality of limiting blocks 320 are disposed on the outer wall of the connector 310, the plurality of limiting blocks 320 are arranged circumferentially around the connector 310, and the plurality of limiting blocks 320 correspond one-to-one with the plurality of limiting grooves 2102, and the limiting blocks 320 are adapted to the corresponding limiting grooves 2102; the knob 330 is connected to the output shaft 110, and the knob 330 abuts against the end of the connector 310 away from the bushing 2101.

[0084] By engaging the limiting block 320 with the limiting groove 2102, the connector 310 and the limiting component 210 are quickly aligned and limited using a plug-in connection, making installation convenient and quick. The knob 330 is connected to the output shaft 110, and the knob 330 abuts against the end of the connector 310 away from the bushing 2101, achieving a reliable connection between the knob 330, the connector 310, and the limiting component 210. This securely mounts the impeller 20 onto the output shaft 110 of the motor 10 and transmits the power output from the motor 10 to the limiting component 210, causing the limiting component 210 and the impeller 20 to rotate.

[0085] It should be noted that the number of limit blocks 320 can be set according to actual needs, and the number of limit blocks 320 is equal to the number of limit slots 2102; for example, such as Figure 4 As shown, there are four limiting blocks 320 and four limiting grooves 2102; in addition, multiple limiting blocks 320 are arranged at equal intervals around the connector 310 in the circumferential direction.

[0086] It should also be noted that, such as Figure 4 As shown, the radial length of the limiting block 320 is greater than the radial length of the limiting groove 2102, and the axial length of the limiting block 320 is greater than the axial length of the limiting groove 2102, meaning the limiting block 320 is higher than the limiting groove 2102. This ensures that the knob 330 abuts against the connecting piece 310 and the limiting block 320, and that the limiting block 320 presses against the bushing 2101, further improving the reliability of the connection.

[0087] like Figure 2 , Figure 6 As shown, in some embodiments, a first limiting surface 2103 is provided on the side wall of the limiting groove 2102, and the first limiting surface 2103 has a preset angle with the axial direction so that the width of the limiting groove 2102 gradually decreases along the axial direction; a second limiting surface 3201 is provided on the side wall of the limiting block 320, and the second limiting surface 3201 has a preset angle with the axial direction, and the second limiting surface 3201 abuts against the first limiting surface 2103.

[0088] By setting the inclined first limiting surface 2103 and the second limiting surface 3201, it can not only play a guiding role during the installation process, making it easy for the limiting block 320 to be quickly aligned with the limiting groove 2102 and inserted, but also generate a pressing effect by utilizing the relative sliding of the first limiting surface 2103 and the second limiting surface 3201 during installation, so that the limiting block 320 presses the bushing 2101, thereby further improving the reliability of the connection between the connector 310 and the bushing 2101.

[0089] It should be noted that, as Figure 2 As shown, the sidewall of the limiting groove 2102 has a preset angle with the axial direction, thereby forming a first limiting surface 2103 on the sidewall of the entire limiting groove 2102; the sidewall of the limiting block 320 has a preset angle with the axial direction, thereby forming a second limiting surface 3201 on the sidewall of the entire limiting block 320. Additionally, as... Figure 4 As shown, each limiting groove 2102 has two first limiting surfaces 2103, and each limiting block 320 has two second limiting surfaces 3201, so that the limiting block 320 and the limiting groove 2102 have multiple limiting surfaces cooperating at the same time.

[0090] In some embodiments, the preset included angle is 15°-30°.

[0091] By setting the preset included angle to 15°-30°, the tilt angle between the first limiting surface 2103 and the second limiting surface 3201 can serve both a guiding function and a pressing effect, thus avoiding the preset included angle being too small or too large, which would affect the reliability of the connection between the connecting component 30 and the bushing 2101.

[0092] Example 5

[0093] like Figure 1 As shown, the fan structure includes a motor 10, a fan wheel 20, and a connecting assembly 30. The motor 10 includes a motor body and an output shaft 110 disposed on the motor body. The fan wheel 20 is sleeved on the output shaft 110 of the motor 10. A limiting assembly 210 is provided on the side of the fan wheel 20 away from the motor body, and the limiting assembly 210 surrounds the output shaft 110. The connecting assembly 30 is disposed on the output shaft 110 and located on the side of the limiting assembly 210 away from the motor body. The connecting assembly 30 cooperates with the limiting assembly 210 to fix the fan wheel 20 on the output shaft 110.

[0094] As can be seen from the above, by placing the limiting component 210 on the side of the impeller 20 away from the motor body and surrounding the output shaft 110, and placing the connecting component 30 on the side of the limiting component 210 away from the motor body, the engagement and installation process of the limiting component 210 and the connecting component 30 are all within the user's line of sight, avoiding blind spots caused by the impeller 20, motor 10, etc. during installation. In addition, when installing the impeller 20 and motor 10, the impeller 20 is first fitted onto the output shaft 110, and then the connecting component 30 is engaged with the limiting component 210 and connected to the output shaft 110. This facilitates the installation of the impeller 20 from top to bottom, making installation convenient and simple, and eliminating blind spots throughout the entire installation process. This effectively avoids blind installation, thereby not only improving the reliability of the installation but also reducing the reliability of improper installation and ensuring the installation effect.

[0095] It should be noted that the impeller 20 includes an upper hub and a lower hub arranged opposite each other in the axial direction, and a fan blade disposed between the upper hub and the lower hub; the impeller 20 also includes a rotating disk 220 disposed on the lower hub, wherein the limiting component 210 is disposed on the rotating disk 220; in addition, the impeller 20 can be a centrifugal impeller 20, that is, an impeller 20 that takes in air axially and exits air radially, and uses centrifugal force (depending on the rotation speed and outer diameter) to do work to increase the air pressure.

[0096] like Figure 1 , Figure 2 As shown, in some embodiments, the limiting component 210 includes a bushing 2101 and a plurality of limiting grooves 2102; the bushing 2101 is sleeved on the output shaft 110; the plurality of limiting grooves 2102 are disposed at one end of the bushing 2101 away from the motor body and extend in the axial direction, the plurality of limiting grooves 2102 are arranged circumferentially around the bushing 2101 at intervals, and the limiting grooves 2102 penetrate the bushing 2101 in the radial direction.

[0097] By setting the bushing 2101 to provide a structural basis for the output shaft 110 to pass through, and setting multiple limiting grooves 2102 at the end of the bushing 2101 away from the motor body, it is ensured that there is no blind spot when the limiting grooves 2102 and the connecting component 30 are installed together. Compared with the prior art where the groove is set at the bottom of the centrifugal impeller 20, the present invention effectively avoids blind installation, thus making the installation simpler.

[0098] It should be noted that the number of limit slots 2102 can be set according to actual needs, such as... Figure 2 As shown, the number of limiting grooves 2102 can be four; in addition, multiple limiting grooves 2102 can be arranged at equal intervals around the bushing 2101 in the circumferential direction.

[0099] It should also be noted that the bushing 2101 is mounted on the rotating shaft disk 220, and the bushing 2101 and the rotating shaft disk 220 are connected by means of welding or integral molding.

[0100] like Figure 1 , Figures 3-6 As shown, in some embodiments, the connecting component 30 includes a connector 310, a plurality of limiting blocks 320, and a knob 330; the connector 310 is adapted to the output shaft 110; the plurality of limiting blocks 320 are disposed on the outer wall of the connector 310, the plurality of limiting blocks 320 are arranged circumferentially around the connector 310, and the plurality of limiting blocks 320 correspond one-to-one with the plurality of limiting grooves 2102, and the limiting blocks 320 are adapted to the corresponding limiting grooves 2102; the knob 330 is connected to the output shaft 110, and the knob 330 abuts against the end of the connector 310 away from the bushing 2101.

[0101] By engaging the limiting block 320 with the limiting groove 2102, the connector 310 and the limiting component 210 are quickly aligned and limited using a plug-in connection, making installation convenient and quick. The knob 330 is connected to the output shaft 110, and the knob 330 abuts against the end of the connector 310 away from the bushing 2101, achieving a reliable connection between the knob 330, the connector 310, and the limiting component 210. This securely mounts the impeller 20 onto the output shaft 110 of the motor 10 and transmits the power output from the motor 10 to the limiting component 210, causing the limiting component 210 and the impeller 20 to rotate.

[0102] It should be noted that the number of limit blocks 320 can be set according to actual needs, and the number of limit blocks 320 is equal to the number of limit slots 2102; for example, such as Figure 4 As shown, there are four limiting blocks 320 and four limiting grooves 2102; in addition, multiple limiting blocks 320 are arranged at equal intervals around the connector 310 in the circumferential direction.

[0103] It should also be noted that, such as Figure 4 As shown, the radial length of the limiting block 320 is greater than the radial length of the limiting groove 2102, and the axial length of the limiting block 320 is greater than the axial length of the limiting groove 2102, meaning the limiting block 320 is higher than the limiting groove 2102. This ensures that the knob 330 abuts against the connecting piece 310 and the limiting block 320, and that the limiting block 320 presses against the bushing 2101, further improving the reliability of the connection.

[0104] like Figure 2 , Figure 6 As shown, in some embodiments, a first limiting surface 2103 is provided on the side wall of the limiting groove 2102, and the first limiting surface 2103 has a preset angle with the axial direction so that the width of the limiting groove 2102 gradually decreases along the axial direction; a second limiting surface 3201 is provided on the side wall of the limiting block 320, and the second limiting surface 3201 has a preset angle with the axial direction, and the second limiting surface 3201 abuts against the first limiting surface 2103.

[0105] By setting the inclined first limiting surface 2103 and the second limiting surface 3201, it can not only play a guiding role during the installation process, making it easy for the limiting block 320 to be quickly aligned with the limiting groove 2102 and inserted, but also generate a pressing effect by utilizing the relative sliding of the first limiting surface 2103 and the second limiting surface 3201 during installation, so that the limiting block 320 presses the bushing 2101, thereby further improving the reliability of the connection between the connector 310 and the bushing 2101.

[0106] It should be noted that, as Figure 2 As shown, the sidewall of the limiting groove 2102 has a preset angle with the axial direction, thereby forming a first limiting surface 2103 on the sidewall of the entire limiting groove 2102; the sidewall of the limiting block 320 has a preset angle with the axial direction, thereby forming a second limiting surface 3201 on the sidewall of the entire limiting block 320. Additionally, as... Figure 4 As shown, each limiting groove 2102 has two first limiting surfaces 2103, and each limiting block 320 has two second limiting surfaces 3201, so that the limiting block 320 and the limiting groove 2102 have multiple limiting surfaces cooperating at the same time.

[0107] In some embodiments, the preset included angle is 15°-30°.

[0108] By setting the preset included angle to 15°-30°, the tilt angle between the first limiting surface 2103 and the second limiting surface 3201 can serve both a guiding function and a pressing effect, thus avoiding the preset included angle being too small or too large, which would affect the reliability of the connection between the connecting component 30 and the bushing 2101.

[0109] like Figure 7As shown, in some embodiments, there is a gap between the bottom surface of the limiting groove 2102 and the bottom surface of the limiting block 320.

[0110] By setting a gap between the bottom surface of the limiting groove 2102 and the bottom surface of the limiting block 320, space is reserved for relative sliding between the limiting block 320 and the limiting groove 2102. As the knob 330 is continuously pressed down, the limiting block 320 will move downward, so space needs to be reserved to prevent the bottom surface of the limiting groove 2102 from abutting against the bottom surface of the limiting block 320. This allows the first limiting surface 2103 and the second limiting surface 3201 to have relative sliding space and can generate a pressing effect by using relative sliding, thereby making the contact between the first limiting surface 2103 and the second limiting surface 3201 tighter and the connection between the bushing 2101 and the connecting assembly 30 more secure.

[0111] It should be noted that the bottom surface of the limiting groove 2102 is connected to the two side walls of the limiting groove 2102 respectively, and the bottom surface of the limiting groove 2102 is located between the two side walls of the limiting groove 2102; the bottom surface of the limiting block 320 is connected to the two side walls of the limiting block 320 respectively, and the bottom surface of the limiting block 320 is located between the two side walls of the limiting block 320.

[0112] Example 6

[0113] like Figure 1 As shown, the fan structure includes a motor 10, a fan wheel 20, and a connecting assembly 30. The motor 10 includes a motor body and an output shaft 110 disposed on the motor body. The fan wheel 20 is sleeved on the output shaft 110 of the motor 10. A limiting assembly 210 is provided on the side of the fan wheel 20 away from the motor body, and the limiting assembly 210 surrounds the output shaft 110. The connecting assembly 30 is disposed on the output shaft 110 and located on the side of the limiting assembly 210 away from the motor body. The connecting assembly 30 cooperates with the limiting assembly 210 to fix the fan wheel 20 on the output shaft 110.

[0114] As can be seen from the above, by placing the limiting component 210 on the side of the impeller 20 away from the motor body and surrounding the output shaft 110, and placing the connecting component 30 on the side of the limiting component 210 away from the motor body, the engagement and installation process of the limiting component 210 and the connecting component 30 are all within the user's line of sight, avoiding blind spots caused by the impeller 20, motor 10, etc. during installation. In addition, when installing the impeller 20 and motor 10, the impeller 20 is first fitted onto the output shaft 110, and then the connecting component 30 is engaged with the limiting component 210 and connected to the output shaft 110. This facilitates the installation of the impeller 20 from top to bottom, making installation convenient and simple, and eliminating blind spots throughout the entire installation process. This effectively avoids blind installation, thereby not only improving the reliability of the installation but also reducing the reliability of improper installation and ensuring the installation effect.

[0115] It should be noted that the impeller 20 includes an upper hub and a lower hub arranged opposite each other in the axial direction, and a fan blade disposed between the upper hub and the lower hub; the impeller 20 also includes a rotating disk 220 disposed on the lower hub, wherein the limiting component 210 is disposed on the rotating disk 220; in addition, the impeller 20 can be a centrifugal impeller 20, that is, an impeller 20 that takes in air axially and exits air radially, and uses centrifugal force (depending on the rotation speed and outer diameter) to do work to increase the air pressure.

[0116] like Figure 1 , Figure 2 As shown, in some embodiments, the limiting component 210 includes a bushing 2101 and a plurality of limiting grooves 2102; the bushing 2101 is sleeved on the output shaft 110; the plurality of limiting grooves 2102 are disposed at one end of the bushing 2101 away from the motor body and extend in the axial direction, the plurality of limiting grooves 2102 are arranged circumferentially around the bushing 2101 at intervals, and the limiting grooves 2102 penetrate the bushing 2101 in the radial direction.

[0117] By setting the bushing 2101 to provide a structural basis for the output shaft 110 to pass through, and setting multiple limiting grooves 2102 at the end of the bushing 2101 away from the motor body, it is ensured that there is no blind spot when the limiting grooves 2102 and the connecting component 30 are installed together. Compared with the prior art where the groove is set at the bottom of the centrifugal impeller 20, the present invention effectively avoids blind installation, thus making the installation simpler.

[0118] It should be noted that the number of limit slots 2102 can be set according to actual needs, such as... Figure 2 As shown, the number of limiting grooves 2102 can be four; in addition, multiple limiting grooves 2102 can be arranged at equal intervals around the bushing 2101 in the circumferential direction.

[0119] It should also be noted that the bushing 2101 is mounted on the rotating shaft disk 220, and the bushing 2101 and the rotating shaft disk 220 are connected by means of welding or integral molding.

[0120] like Figure 1 , Figures 3-6 As shown, in some embodiments, the connecting component 30 includes a connector 310, a plurality of limiting blocks 320, and a knob 330; the connector 310 is adapted to the output shaft 110; the plurality of limiting blocks 320 are disposed on the outer wall of the connector 310, the plurality of limiting blocks 320 are arranged circumferentially around the connector 310, and the plurality of limiting blocks 320 correspond one-to-one with the plurality of limiting grooves 2102, and the limiting blocks 320 are adapted to the corresponding limiting grooves 2102; the knob 330 is connected to the output shaft 110, and the knob 330 abuts against the end of the connector 310 away from the bushing 2101.

[0121] By engaging the limiting block 320 with the limiting groove 2102, the connector 310 and the limiting component 210 are quickly aligned and limited using a plug-in connection, making installation convenient and quick. The knob 330 is connected to the output shaft 110, and the knob 330 abuts against the end of the connector 310 away from the bushing 2101, achieving a reliable connection between the knob 330, the connector 310, and the limiting component 210. This securely mounts the impeller 20 onto the output shaft 110 of the motor 10 and transmits the power output from the motor 10 to the limiting component 210, causing the limiting component 210 and the impeller 20 to rotate.

[0122] It should be noted that the number of limit blocks 320 can be set according to actual needs, and the number of limit blocks 320 is equal to the number of limit slots 2102; for example, such as Figure 4 As shown, there are four limiting blocks 320 and four limiting grooves 2102; in addition, multiple limiting blocks 320 are arranged at equal intervals around the connector 310 in the circumferential direction.

[0123] It should also be noted that, such as Figure 4 As shown, the radial length of the limiting block 320 is greater than the radial length of the limiting groove 2102, and the axial length of the limiting block 320 is greater than the axial length of the limiting groove 2102, meaning the limiting block 320 is higher than the limiting groove 2102. This ensures that the knob 330 abuts against the connecting piece 310 and the limiting block 320, and that the limiting block 320 presses against the bushing 2101, further improving the reliability of the connection.

[0124] like Figure 2 , Figure 6 As shown, in some embodiments, a first limiting surface 2103 is provided on the side wall of the limiting groove 2102, and the first limiting surface 2103 has a preset angle with the axial direction so that the width of the limiting groove 2102 gradually decreases along the axial direction; a second limiting surface 3201 is provided on the side wall of the limiting block 320, and the second limiting surface 3201 has a preset angle with the axial direction, and the second limiting surface 3201 abuts against the first limiting surface 2103.

[0125] By setting the inclined first limiting surface 2103 and the second limiting surface 3201, it can not only play a guiding role during the installation process, making it easy for the limiting block 320 to be quickly aligned with the limiting groove 2102 and inserted, but also generate a pressing effect by utilizing the relative sliding of the first limiting surface 2103 and the second limiting surface 3201 during installation, so that the limiting block 320 presses the bushing 2101, thereby further improving the reliability of the connection between the connector 310 and the bushing 2101.

[0126] It should be noted that, as Figure 2As shown, the sidewall of the limiting groove 2102 has a preset angle with the axial direction, thereby forming a first limiting surface 2103 on the sidewall of the entire limiting groove 2102; the sidewall of the limiting block 320 has a preset angle with the axial direction, thereby forming a second limiting surface 3201 on the sidewall of the entire limiting block 320. Additionally, as... Figure 4 As shown, each limiting groove 2102 has two first limiting surfaces 2103, and each limiting block 320 has two second limiting surfaces 3201, so that the limiting block 320 and the limiting groove 2102 have multiple limiting surfaces cooperating at the same time.

[0127] In some embodiments, the preset included angle is 15°-30°.

[0128] By setting the preset included angle to 15°-30°, the tilt angle between the first limiting surface 2103 and the second limiting surface 3201 can serve both a guiding function and a pressing effect, thus avoiding the preset included angle being too small or too large, which would affect the reliability of the connection between the connecting component 30 and the bushing 2101.

[0129] like Figure 7 As shown, in some embodiments, there is a gap between the bottom surface of the limiting groove 2102 and the bottom surface of the limiting block 320.

[0130] By setting a gap between the bottom surface of the limiting groove 2102 and the bottom surface of the limiting block 320, space is reserved for relative sliding between the limiting block 320 and the limiting groove 2102. As the knob 330 is continuously pressed down, the limiting block 320 will move downward, so space needs to be reserved to prevent the bottom surface of the limiting groove 2102 from abutting against the bottom surface of the limiting block 320. This allows the first limiting surface 2103 and the second limiting surface 3201 to have relative sliding space and can generate a pressing effect by using relative sliding, thereby making the contact between the first limiting surface 2103 and the second limiting surface 3201 tighter and the connection between the bushing 2101 and the connecting assembly 30 more secure.

[0131] It should be noted that the bottom surface of the limiting groove 2102 is connected to the two side walls of the limiting groove 2102 respectively, and the bottom surface of the limiting groove 2102 is located between the two side walls of the limiting groove 2102; the bottom surface of the limiting block 320 is connected to the two side walls of the limiting block 320 respectively, and the bottom surface of the limiting block 320 is located between the two side walls of the limiting block 320.

[0132] like Figure 1 As shown, in some embodiments, the output shaft 110 includes a positioning shaft segment 1101, and a plurality of first positioning surfaces 1102 are provided on the side of the positioning shaft segment 1101. The plurality of first positioning surfaces 1102 are arranged circumferentially around the positioning shaft segment 1101, and the first positioning surfaces 1102 are parallel to the axial direction; wherein, the connector 310 is adapted to the positioning shaft segment 1101.

[0133] By setting the positioning shaft segment 1101 to be compatible with the connector 310, and setting multiple first positioning surfaces 1102 parallel to the axial direction on the positioning shaft segment 1101, a structural basis is provided for the connection between the connector 310 and the positioning shaft segment 1101, avoiding phase slippage between the connector 310 and the positioning shaft segment 1101, thereby improving the reliability of the connection and enabling the connector 310 to transmit the power output by the motor 10 to the limiting component 210.

[0134] It should be noted that the number of the first positioning surfaces 1102 is set according to actual needs, for example, such as Figure 1 As shown, there are two first positioning surfaces 1102; in addition, multiple first positioning surfaces 1102 are arranged at equal intervals around the positioning axis segment 1101.

[0135] like Figure 3 As shown, in some embodiments, the connector 310 is provided with a through hole 3101, and a plurality of second positioning surfaces 3102 are provided on the inner wall of the through hole 3101. The plurality of second positioning surfaces 3102 are arranged circumferentially around the through hole 3101 at intervals, and the plurality of second positioning surfaces 3102 correspond one-to-one with a plurality of first positioning surfaces 1102; wherein, the second positioning surface 3102 is adapted to the corresponding first positioning surface 1102.

[0136] By setting the first positioning surface 1102 to be compatible with the second positioning surface 3102, the reliability of the connection between the connector 310 and the motor 10 shaft is ensured, thereby reliably transmitting the power output by the motor 10.

[0137] It should be noted that the number of second positioning surfaces 3102 is set according to actual needs, and the number of second positioning surfaces 3102 is the same as the number of first positioning surfaces 1102; for example, such as Figure 3 As shown, there are two second positioning surfaces 3102; in addition, multiple second positioning surfaces 3102 are arranged at equal intervals around the positioning axis segment 1101.

[0138] like Figure 1 As shown, in some embodiments, the output shaft 110 further includes a fixed shaft section 1103, which is provided with a left-hand thread to connect with the knob 330; wherein, the motor 10 drives the impeller 20 to rotate clockwise.

[0139] By connecting the knob 330 with a left-hand thread, the knob 330 can become increasingly tighter as the impeller 20 rotates clockwise, thus making the fixation of the impeller 20 more reliable. In addition, because there is a gap between the bottom of the limiting block 320 and the bottom of the limiting groove 2102, and the width of the limiting groove 2102 and the limiting block 320 gradually decreases from top to bottom along the axial direction, relative sliding will occur between the limiting block 320 and the limiting groove 2102 during the continuous tightening of the knob 330. The first limiting surface 2103 and the second limiting surface 3201 will be in close contact, making the connection and fixation between the bushing 2101 and the connecting piece 310 more secure.

[0140] like Figure 8 As shown, in some embodiments, the fan structure further includes a volute 40, on which an air duct is provided and an air inlet and an air outlet 410 respectively connected to the air duct; wherein, the motor 10 is provided on the volute 40, and the impeller 20 is provided inside the air inlet, so that the external airflow flows into the air duct and flows out through the air outlet 410.

[0141] The motor 10 drives the impeller 20 to rotate, providing the power for external airflow to flow from the air inlet to the air outlet 410.

[0142] It should be noted that the volute 40 has a receiving space on the side away from the air inlet, and the motor 10 is located in the receiving space; in addition, the motor 10 is installed on the volute 40 by means of welding or fastener connection, including but not limited to welding.

[0143] Example 7

[0144] This invention also provides a household appliance, including a fan structure according to any embodiment of this invention, thereby possessing all the technical effects brought about by the technical solutions of the above embodiments.

[0145] It should be noted that household appliances include, but are not limited to, range hoods. Range hoods are commonly used household appliances in the kitchen. The motor 10 drives the impeller 20 to rotate and generate negative pressure, which draws in the indoor fumes. The fumes enter the air duct of the volute 40 and flow out through the air outlet 410.

[0146] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A fan structure, characterized in that: include: The motor comprises a motor body and an output shaft provided on the motor body; A wind wheel is sleeved on the output shaft, a limiting assembly is provided on a side of the wind wheel away from the motor body, and the limiting assembly surrounds the output shaft; as well as A connecting assembly is provided on the output shaft and is located on a side of the limiting assembly away from the motor body. The connecting assembly cooperates with the limiting assembly to fix the wind wheel on the output shaft.

2. The fan structure according to claim 1, characterized in that: The limiting component includes: a shaft sleeve, sleeved on the output shaft; and A plurality of limiting grooves are provided at one end of the shaft sleeve away from the motor body and extend in the axial direction. The plurality of limiting grooves are arranged at intervals in the circumferential direction around the shaft sleeve, and the limiting grooves pass through the shaft sleeve in the radial direction.

3. The fan structure according to claim 2, characterized in that: The connection component includes: A connecting piece adapted to the output shaft; a plurality of limit blocks, disposed on the outer wall of the connecting member, the plurality of limit blocks being circumferentially spaced around the connecting member, and the plurality of limit blocks corresponding one-to-one to the plurality of limit grooves, respectively, and the limit blocks being adapted to the corresponding limit grooves; and A knob is connected to the output shaft, and the knob abuts against an end of the connecting member away from the sleeve.

4. The fan structure according to claim 3, characterized in that: A first limiting surface is provided on the side wall of the limiting groove, and a preset angle is formed between the first limiting surface and the axial direction so that the width of the limiting groove gradually decreases along the axial direction; A second limiting surface is provided on the side wall of the limiting block, the second limiting surface has the preset angle with the axial direction, and the second limiting surface abuts against the first limiting surface.

5. The fan structure according to claim 4, characterized in that: The preset angle is 15°-30°.

6. The fan structure according to claim 4, characterized in that: There is a gap between the bottom surface of the limiting groove and the bottom surface of the limiting block.

7. The fan structure according to claim 3, characterized in that: The output shaft includes a positioning shaft segment, and a plurality of first positioning surfaces are provided on a side surface of the positioning shaft segment. The plurality of first positioning surfaces are circumferentially spaced around the positioning shaft segment, and the first positioning surfaces are parallel to the axial direction; Wherein, the connecting piece is adapted to the positioning shaft segment.

8. The fan structure according to claim 7, characterized in that: A through hole is provided on the connecting member, and a plurality of second positioning surfaces are provided on the inner wall of the through hole. The plurality of second positioning surfaces are arranged at intervals around the through hole in a circumferential direction, and the plurality of second positioning surfaces correspond one-to-one to the plurality of first positioning surfaces respectively; wherein the second positioning surfaces are adapted to the corresponding first positioning surfaces.

9. The fan structure according to any one of claims 3 to 8, characterized in that: The output shaft further includes a fixed shaft section, on which a left-hand thread is provided for threaded connection with the knob; Wherein, the motor drives the wind wheel to rotate clockwise.

10. The fan structure according to any one of claims 1 to 8, characterized in that: The fan structure further comprises a volute, wherein the volute is provided with an air duct and an air inlet and an air outlet respectively connected to the air duct; Wherein, the motor is arranged on the volute, and the wind wheel is arranged in the air inlet, so that the external air flow flows into the air duct and flows out through the air outlet.

11. A household appliance, characterized in that: The invention comprises a fan structure as claimed in any one of claims 1 to 10.

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