Fan structure and household appliance

Abstract

The application 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 sleeved on the output shaft, one side of the wind wheel away from the motor body is provided with a limiting assembly, and the limiting assembly surrounds the output shaft; the connecting assembly is arranged on the output shaft and located at one side of the limiting assembly away from the motor body; and the connecting assembly is matched with the limiting assembly, so that the wind wheel is fixed on the output shaft. The disclosed technical scheme can solve the problem that, when the existing wind wheel and motor are installed, there is a visual blind area, the wind wheel and the motor are in a blind installation state, and the installation is difficult and unreliable.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a fan structure and a household appliance. Background Art

[0002] Household appliances refer to various electrical and electronic devices used in homes and similar places. Household appliances have become a necessity in modern family life. Centrifugal fans are an important component of household appliances such as range hoods. Centrifugal fans include a motor and a centrifugal impeller mounted on the output shaft of the motor. In some cases, a fixed pin is provided on the output shaft of the motor, and a groove corresponding to the fixed pin is provided on the mounting hole where the centrifugal impeller and the output shaft match. However, when the centrifugal impeller is installed on the motor, the groove is located at the bottom of the centrifugal impeller, which is in a blind spot. It is difficult to align the groove with the fixed pin, which not only increases the difficulty of installation, but also may cause the installation to be incomplete, resulting in risks during the operation of the centrifugal fan. Summary of the Invention

[0003] The embodiments of the present invention provide a fan structure and a household appliance, which can solve the problem that a blind spot exists when installing a conventional wind wheel and a motor, causing the wind wheel and the motor to be in a blind installation state, resulting in difficult and unreliable installation.

[0004] In a first aspect, an embodiment of the present invention provides a fan structure, comprising:

[0005] The motor comprises a motor body and an output shaft provided on the motor body;

[0006] a wind wheel, sleeved on the output shaft, a limiting assembly being provided on a side of the wind wheel away from the motor body, and the limiting assembly surrounding the output shaft; and

[0007] 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.

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

[0009] a shaft sleeve, sleeved on the output shaft; and

[0010] 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.

[0011] In one embodiment, the connection assembly comprises:

[0012] A connecting piece adapted to the output shaft;

[0013] 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

[0014] A knob is connected to the output shaft, and the knob abuts against an end of the connecting member away from the sleeve.

[0015] In one embodiment, 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;

[0016] 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.

[0017] In one embodiment, the preset 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, 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;

[0020] Wherein, the connecting piece is adapted to the positioning shaft segment.

[0021] In one embodiment, 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 circumferentially around the through hole, 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.

[0022] In one embodiment, the output shaft further comprises a fixed shaft segment, and the fixed shaft segment is provided with a left-hand thread for threaded connection with the knob;

[0023] Wherein, the motor drives the wind wheel to rotate clockwise.

[0024] In one embodiment, 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;

[0025] 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.

[0026] In a second aspect, an embodiment of the present invention provides a household appliance comprising the fan structure as described above.

[0027] Compared with the prior art, the advantage of the embodiment of the present invention is that, by arranging the limiting component on the side of the wind wheel away from the motor body and surrounding the output shaft, and arranging the connecting component on the side of the limiting component away from the motor body, the coordination and installation process of the limiting component and the connecting component are all within the user's line of sight, thus avoiding the occurrence of blind spots due to obstructions by the wind wheel, motor, etc. during installation. In addition, when installing the wind wheel and the motor, the wind wheel is first sleeved on the output shaft of the motor, and then the connecting component is coordinated with the limiting component and the connecting component is connected to the output shaft, so that the wind wheel can be installed from top to bottom. The installation is convenient and simple, and there is no blind spot in the entire installation process, which effectively avoids blind installation, thereby not only improving the reliability of the installation, but also reducing the reliability of inadequate installation, and ensuring the installation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Hereinafter, the present invention will be described in more detail based on embodiments with reference to the accompanying drawings.

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

[0030] Figure 2 yes Figure 1 A schematic structural diagram of a position limiting assembly provided in the embodiment;

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

[0032] Figure 4 yes Figure 1 Schematic diagram of the installation of the connector and the limit assembly provided in the embodiment;

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

[0034] Figure 6 yes Figure 1 A cross-sectional view of the fan structure provided in the embodiment at another viewing angle;

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

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

[0037] Reference numerals:

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

[0039] 20. Wind wheel; 210. Limiting assembly; 2101. Shaft sleeve; 2102. Limiting groove; 2103. First limiting surface; 220. Rotating shaft;

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

[0041] 40. Volute; 410. Air outlet. DETAILED DESCRIPTION

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

[0043] Household appliances refer to various electrical and electronic devices used in homes and similar places. Household appliances have become a necessity in modern family life. Centrifugal fans are an important component of household appliances such as range hoods. Centrifugal fans include a motor and a centrifugal impeller mounted on the output shaft of the motor. In some cases, a fixed pin is provided on the output shaft of the motor, and a groove corresponding to the fixed pin is provided on the mounting shaft hole that matches the centrifugal impeller and the output shaft. During installation, the mounting shaft hole of the centrifugal impeller is first sleeved on the output shaft of the motor, and then manually adjusted to align the groove on the centrifugal impeller with the fixed pin on the output shaft of the motor. After installation is in place, the impeller knob is used to secure the centrifugal impeller, thereby achieving installation of the centrifugal impeller. However, when the centrifugal impeller is installed on the motor, the groove is located at the bottom of the centrifugal impeller and is in a blind spot. It is difficult to align the groove with the fixed pin, which not only increases the difficulty of installation, but also causes the centrifugal impeller to be improperly installed, resulting in risks during operation of the centrifugal fan.

[0044] Example 1

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

[0046] As can be seen from the above, by setting the limiting component 210 on the side of the wind wheel 20 away from the motor body and surrounding the output shaft 110, and setting the connecting component 30 on the side of the limiting component 210 away from the motor body, the coordination and installation process of the limiting component 210 and the connecting component 30 are all within the user's line of sight, avoiding the occurrence of blind spots due to obstruction by the wind wheel 20, the motor 10, etc. during installation. In addition, when the wind wheel 20 and the motor 10 are installed, the wind wheel 20 is first sleeved on the output shaft 110, and then the connecting component 30 is coordinated with the limiting component 210 and the connecting component 30 is connected to the output shaft 110, so that the wind wheel 20 can be installed from top to bottom. The installation is convenient and simple, and there is no blind spot in the entire installation process, which effectively avoids blind installation, thereby not only improving the reliability of the installation, but also reducing the reliability of inadequate installation, and ensuring the installation effect.

[0047] It should be noted that the wind wheel 20 includes an upper hub and a lower hub arranged relative to each other in the axial direction, and a fan blade arranged between the upper hub and the lower hub; the wind wheel 20 also includes a rotating shaft disk 220 arranged on the lower hub, wherein the limiting assembly 210 is arranged on the rotating shaft disk 220; in addition, the wind wheel 20 can be a centrifugal wind wheel 20, that is, the wind takes in axially and discharges radially, and uses centrifugal force (determined by the rotational speed and outer diameter) to do work to increase the pressure of the air.

[0048] Example 2

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

[0050] As can be seen from the above, by setting the limiting component 210 on the side of the wind wheel 20 away from the motor body and surrounding the output shaft 110, and setting the connecting component 30 on the side of the limiting component 210 away from the motor body, the coordination and installation process of the limiting component 210 and the connecting component 30 are all within the user's line of sight, avoiding the occurrence of blind spots due to obstruction by the wind wheel 20, the motor 10, etc. during installation. In addition, when the wind wheel 20 and the motor 10 are installed, the wind wheel 20 is first sleeved on the output shaft 110, and then the connecting component 30 is coordinated with the limiting component 210 and the connecting component 30 is connected to the output shaft 110, so that the wind wheel 20 can be installed from top to bottom. The installation is convenient and simple, and there is no blind spot in the entire installation process, which effectively avoids blind installation, thereby not only improving the reliability of the installation, but also reducing the reliability of inadequate installation, and ensuring the installation effect.

[0051] It should be noted that the wind wheel 20 includes an upper hub and a lower hub arranged relative to each other in the axial direction, and a fan blade arranged between the upper hub and the lower hub; the wind wheel 20 also includes a rotating shaft disk 220 arranged on the lower hub, wherein the limiting assembly 210 is arranged on the rotating shaft disk 220; in addition, the wind wheel 20 can be a centrifugal wind wheel 20, that is, the wind takes in axially and discharges radially, and uses centrifugal force (determined by the rotational speed and outer diameter) to do work to increase the pressure of the air.

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

[0053] By setting a shaft sleeve 2101 to provide a structural basis for the insertion of the output shaft 110, a plurality of limit grooves 2102 are set at the end of the shaft sleeve 2101 away from the motor body, ensuring that there is no blind spot when the limit groove 2102 and the connecting component 30 are installed in conjunction. Compared with the prior art in which the groove is set at the bottom of the centrifugal impeller 20, the present invention effectively avoids the situation of blind installation, thereby making installation easier.

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

[0055] It should also be noted that the shaft sleeve 2101 is provided on the rotating shaft disk 220 , and the shaft sleeve 2101 and the rotating shaft disk 220 are connected including but not limited to by welding or integral mold forming.

[0056] like Figure 1 、 Figure 3-Figure 6 As shown, in some embodiments, the connecting assembly 30 includes a connecting member 310, a plurality of limit blocks 320 and a knob 330; the connecting member 310 is adapted to the output shaft 110; the plurality of limit blocks 320 are arranged on the outer wall of the connecting member 310, the plurality of limit blocks 320 are arranged circumferentially around the connecting member 310, and the plurality of limit blocks 320 respectively correspond to the plurality of limit grooves 2102 one by one, and the limit blocks 320 are adapted to the corresponding limit grooves 2102; the knob 330 is connected to the output shaft 110, and the knob 330 abuts against the end of the connecting member 310 away from the sleeve 2101.

[0057] By cooperating with the limit block 320 and the limit groove 2102, the connector 310 and the limit assembly 210 are quickly aligned and limited by a plug-in connection method, and the installation is 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 sleeve 2101, thereby realizing a reliable connection between the knob 330, the connector 310 and the limit assembly 210, thereby firmly installing the wind wheel 20 on the output shaft 110 of the motor 10, and transmitting the power output by the motor 10 to the limit assembly 210, driving the limit assembly 210 and the wind wheel 20 to rotate.

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

[0059] It should also be noted that if Figure 4 As shown, the radial length of the limit block 320 is greater than the radial length of the limit slot 2102, and the axial length of the limit block 320 is greater than the axial length of the limit slot 2102, that is, the limit block 320 is higher than the limit slot 2102. This ensures that the knob 330 is in contact with the connector 310 and the limit block 320, and that the limit block 320 presses the sleeve 2101, thereby further improving the reliability of the connection.

[0060] Example 3

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

[0062] As can be seen from the above, by setting the limiting component 210 on the side of the wind wheel 20 away from the motor body and surrounding the output shaft 110, and setting the connecting component 30 on the side of the limiting component 210 away from the motor body, the coordination and installation process of the limiting component 210 and the connecting component 30 are all within the user's line of sight, avoiding the occurrence of blind spots due to obstruction by the wind wheel 20, the motor 10, etc. during installation. In addition, when the wind wheel 20 and the motor 10 are installed, the wind wheel 20 is first sleeved on the output shaft 110, and then the connecting component 30 is coordinated with the limiting component 210 and the connecting component 30 is connected to the output shaft 110, so that the wind wheel 20 can be installed from top to bottom. The installation is convenient and simple, and there is no blind spot in the entire installation process, which effectively avoids blind installation, thereby not only improving the reliability of the installation, but also reducing the reliability of inadequate installation, and ensuring the installation effect.

[0063] It should be noted that the wind wheel 20 includes an upper hub and a lower hub arranged relative to each other in the axial direction, and a fan blade arranged between the upper hub and the lower hub; the wind wheel 20 also includes a rotating shaft disk 220 arranged on the lower hub, wherein the limiting assembly 210 is arranged on the rotating shaft disk 220; in addition, the wind wheel 20 can be a centrifugal wind wheel 20, that is, the wind takes in axially and discharges radially, and uses centrifugal force (determined by the rotational speed and outer diameter) to do work to increase the pressure of the air.

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

[0065] By setting a shaft sleeve 2101 to provide a structural basis for the insertion of the output shaft 110, a plurality of limit grooves 2102 are set at the end of the shaft sleeve 2101 away from the motor body, ensuring that there is no blind spot when the limit groove 2102 and the connecting component 30 are installed in conjunction. Compared with the prior art in which the groove is set at the bottom of the centrifugal impeller 20, the present invention effectively avoids the situation of blind installation, thereby making installation easier.

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

[0067] It should also be noted that the shaft sleeve 2101 is provided on the rotating shaft disk 220 , and the shaft sleeve 2101 and the rotating shaft disk 220 are connected including but not limited to by welding or integral mold forming.

[0068] like Figure 1 、 Figure 3-Figure 6 As shown, in some embodiments, the connecting assembly 30 includes a connecting member 310, a plurality of limit blocks 320 and a knob 330; the connecting member 310 is adapted to the output shaft 110; the plurality of limit blocks 320 are arranged on the outer wall of the connecting member 310, the plurality of limit blocks 320 are arranged circumferentially around the connecting member 310, and the plurality of limit blocks 320 respectively correspond to the plurality of limit grooves 2102 one by one, and the limit blocks 320 are adapted to the corresponding limit grooves 2102; the knob 330 is connected to the output shaft 110, and the knob 330 abuts against the end of the connecting member 310 away from the sleeve 2101.

[0069] By cooperating with the limit block 320 and the limit groove 2102, the connector 310 and the limit assembly 210 are quickly aligned and limited by a plug-in connection method, and the installation is 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 sleeve 2101, thereby realizing a reliable connection between the knob 330, the connector 310 and the limit assembly 210, thereby firmly installing the wind wheel 20 on the output shaft 110 of the motor 10, and transmitting the power output by the motor 10 to the limit assembly 210, driving the limit assembly 210 and the wind wheel 20 to rotate.

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

[0071] It should also be noted that if Figure 4 As shown, the radial length of the limit block 320 is greater than the radial length of the limit slot 2102, and the axial length of the limit block 320 is greater than the axial length of the limit slot 2102, that is, the limit block 320 is higher than the limit slot 2102. This ensures that the knob 330 is in contact with the connector 310 and the limit block 320, and that the limit block 320 presses the sleeve 2101, thereby 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 a preset angle is formed between the first limiting surface 2103 and 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 a preset angle is formed between the second limiting surface 3201 and the axial direction, and the second limiting surface 3201 abuts against the first limiting surface 2103.

[0073] By setting the inclined first limit surface 2103 and the second limit surface 3201, it can not only play a guiding role during the installation process, making it convenient for the limit block 320 to be quickly aligned with the limit groove 2102 and inserted, but also the relative sliding of the first limit surface 2103 and the second limit surface 3201 can be utilized during installation to produce a clamping effect, so that the limit block 320 presses the sleeve 2101, thereby further improving the reliability of the connection between the connecting piece 310 and the sleeve 2101.

[0074] It should be noted that if Figure 2 As shown, there is a preset angle between the side wall of the limiting groove 2102 and the axial direction, so that the side wall of the entire limiting groove 2102 forms a first limiting surface 2103; there is a preset angle between the side wall of the limiting block 320 and the axial direction, so that the side wall of the entire limiting block 320 forms a second limiting surface 3201. In addition, 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 that cooperate simultaneously.

[0075] Example 4

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

[0077] As can be seen from the above, by setting the limiting component 210 on the side of the wind wheel 20 away from the motor body and surrounding the output shaft 110, and setting the connecting component 30 on the side of the limiting component 210 away from the motor body, the coordination and installation process of the limiting component 210 and the connecting component 30 are all within the user's line of sight, avoiding the occurrence of blind spots due to obstruction by the wind wheel 20, the motor 10, etc. during installation. In addition, when the wind wheel 20 and the motor 10 are installed, the wind wheel 20 is first sleeved on the output shaft 110, and then the connecting component 30 is coordinated with the limiting component 210 and the connecting component 30 is connected to the output shaft 110, so that the wind wheel 20 can be installed from top to bottom. The installation is convenient and simple, and there is no blind spot in the entire installation process, which effectively avoids blind installation, thereby not only improving the reliability of the installation, but also reducing the reliability of inadequate installation, and ensuring the installation effect.

[0078] It should be noted that the wind wheel 20 includes an upper hub and a lower hub arranged relative to each other in the axial direction, and a fan blade arranged between the upper hub and the lower hub; the wind wheel 20 also includes a rotating shaft disk 220 arranged on the lower hub, wherein the limiting assembly 210 is arranged on the rotating shaft disk 220; in addition, the wind wheel 20 can be a centrifugal wind wheel 20, that is, the wind takes in axially and discharges radially, and uses centrifugal force (determined by the rotational speed and outer diameter) to do work to increase the pressure of the air.

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

[0080] By setting a shaft sleeve 2101 to provide a structural basis for the insertion of the output shaft 110, a plurality of limit grooves 2102 are set at the end of the shaft sleeve 2101 away from the motor body, ensuring that there is no blind spot when the limit groove 2102 and the connecting component 30 are installed in conjunction. Compared with the prior art in which the groove is set at the bottom of the centrifugal impeller 20, the present invention effectively avoids the situation of blind installation, thereby making installation easier.

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

[0082] It should also be noted that the shaft sleeve 2101 is provided on the rotating shaft disk 220 , and the shaft sleeve 2101 and the rotating shaft disk 220 are connected including but not limited to by welding or integral mold forming.

[0083] like Figure 1 、 Figure 3-Figure 6 As shown, in some embodiments, the connecting assembly 30 includes a connecting member 310, a plurality of limit blocks 320 and a knob 330; the connecting member 310 is adapted to the output shaft 110; the plurality of limit blocks 320 are arranged on the outer wall of the connecting member 310, the plurality of limit blocks 320 are arranged circumferentially around the connecting member 310, and the plurality of limit blocks 320 respectively correspond to the plurality of limit grooves 2102 one by one, and the limit blocks 320 are adapted to the corresponding limit grooves 2102; the knob 330 is connected to the output shaft 110, and the knob 330 abuts against the end of the connecting member 310 away from the sleeve 2101.

[0084] By cooperating with the limit block 320 and the limit groove 2102, the connector 310 and the limit assembly 210 are quickly aligned and limited by a plug-in connection method, and the installation is 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 sleeve 2101, thereby realizing a reliable connection between the knob 330, the connector 310 and the limit assembly 210, thereby firmly installing the wind wheel 20 on the output shaft 110 of the motor 10, and transmitting the power output by the motor 10 to the limit assembly 210, driving the limit assembly 210 and the wind wheel 20 to rotate.

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

[0086] It should also be noted that if Figure 4 As shown, the length of the limiting block 320 in the radial direction is greater than the length of the limiting groove 2102 in the radial direction, and the length of the limiting block 320 in the axial direction is greater than the length of the limiting groove 2102 in the axial direction, that is, the limiting block 320 is higher than the limiting groove 2102. Thus, it is ensured that the knob 330 is in abutment with the connecting piece 310 and the limiting block 320, and the limiting block 320 is pressed against the shaft sleeve 2101, so as to further improve the reliability of the connection.

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

[0088] By arranging the inclined first limiting surface 2103 and the second limiting surface 3201, not only can the guiding effect be achieved during installation, but also the limiting block 320 can be quickly aligned with the limiting groove 2102 and inserted, and the pressing effect can be achieved by the relative sliding of the first limiting surface 2103 and the second limiting surface 3201 during installation, so that the limiting block 320 is pressed against the shaft sleeve 2101, thereby further improving the reliability of the connection between the connecting piece 310 and the shaft sleeve 2101.

[0089] It should be noted that, as shown in Figure 2 The side wall of the limiting groove 2102 has a preset included angle with the axial direction, so that the entire side wall of the limiting groove 2102 forms the first limiting surface 2103; and the side wall of the limiting block 320 has a preset included angle with the axial direction, so that the entire side wall of the limiting block 320 forms the second limiting surface 3201. In addition, as shown in Figure 4 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 are simultaneously matched by multiple limiting surfaces.

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

[0091] By arranging the preset included angle to be 15°-30°, the inclination angle of the first limiting surface 2103 and the second limiting surface 3201 can not only play a guiding role, but also have a pressing effect, so as to avoid that the preset included angle is too small or too large, thereby affecting the reliability of the connection between the connecting assembly 30 and the shaft sleeve 2101.

[0092] Embodiment Five

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

[0094] As can be seen from the above, by setting the limiting component 210 on the side of the wind wheel 20 away from the motor body and surrounding the output shaft 110, and setting the connecting component 30 on the side of the limiting component 210 away from the motor body, the coordination and installation process of the limiting component 210 and the connecting component 30 are all within the user's line of sight, avoiding the occurrence of blind spots due to obstruction by the wind wheel 20, the motor 10, etc. during installation. In addition, when the wind wheel 20 and the motor 10 are installed, the wind wheel 20 is first sleeved on the output shaft 110, and then the connecting component 30 is coordinated with the limiting component 210 and the connecting component 30 is connected to the output shaft 110, so that the wind wheel 20 can be installed from top to bottom. The installation is convenient and simple, and there is no blind spot in the entire installation process, which effectively avoids blind installation, thereby not only improving the reliability of the installation, but also reducing the reliability of inadequate installation, and ensuring the installation effect.

[0095] It should be noted that the wind wheel 20 includes an upper hub and a lower hub arranged relative to each other in the axial direction, and a fan blade arranged between the upper hub and the lower hub; the wind wheel 20 also includes a rotating shaft disk 220 arranged on the lower hub, wherein the limiting assembly 210 is arranged on the rotating shaft disk 220; in addition, the wind wheel 20 can be a centrifugal wind wheel 20, that is, the wind takes in axially and discharges radially, and uses centrifugal force (determined by the rotational speed and outer diameter) to do work to increase the pressure of the air.

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

[0097] By setting a shaft sleeve 2101 to provide a structural basis for the insertion of the output shaft 110, a plurality of limit grooves 2102 are set at the end of the shaft sleeve 2101 away from the motor body, ensuring that there is no blind spot when the limit groove 2102 and the connecting component 30 are installed in conjunction. Compared with the prior art in which the groove is set at the bottom of the centrifugal impeller 20, the present invention effectively avoids the situation of blind installation, thereby making installation easier.

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

[0099] It should also be noted that the shaft sleeve 2101 is provided on the rotating shaft disk 220 , and the shaft sleeve 2101 and the rotating shaft disk 220 are connected including but not limited to by welding or integral mold forming.

[0100] like Figure 1 、 Figure 3-Figure 6 As shown, in some embodiments, the connecting assembly 30 includes a connecting member 310, a plurality of limit blocks 320 and a knob 330; the connecting member 310 is adapted to the output shaft 110; the plurality of limit blocks 320 are arranged on the outer wall of the connecting member 310, the plurality of limit blocks 320 are arranged circumferentially around the connecting member 310, and the plurality of limit blocks 320 respectively correspond to the plurality of limit grooves 2102 one by one, and the limit blocks 320 are adapted to the corresponding limit grooves 2102; the knob 330 is connected to the output shaft 110, and the knob 330 abuts against the end of the connecting member 310 away from the sleeve 2101.

[0101] By cooperating with the limit block 320 and the limit groove 2102, the connector 310 and the limit assembly 210 are quickly aligned and limited by a plug-in connection method, and the installation is 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 sleeve 2101, thereby realizing a reliable connection between the knob 330, the connector 310 and the limit assembly 210, thereby firmly installing the wind wheel 20 on the output shaft 110 of the motor 10, and transmitting the power output by the motor 10 to the limit assembly 210, driving the limit assembly 210 and the wind wheel 20 to rotate.

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

[0103] It should also be noted that if Figure 4 As shown, the radial length of the limit block 320 is greater than the radial length of the limit slot 2102, and the axial length of the limit block 320 is greater than the axial length of the limit slot 2102, that is, the limit block 320 is higher than the limit slot 2102. This ensures that the knob 330 is in contact with the connector 310 and the limit block 320, and that the limit block 320 presses the sleeve 2101, thereby 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 a preset angle is formed between the first limiting surface 2103 and 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 a preset angle is formed between the second limiting surface 3201 and the axial direction, and the second limiting surface 3201 abuts against the first limiting surface 2103.

[0105] By setting the inclined first limit surface 2103 and the second limit surface 3201, it can not only play a guiding role during the installation process, making it convenient for the limit block 320 to be quickly aligned with the limit groove 2102 and inserted, but also the relative sliding of the first limit surface 2103 and the second limit surface 3201 can be utilized during installation to produce a clamping effect, so that the limit block 320 presses the sleeve 2101, thereby further improving the reliability of the connection between the connecting piece 310 and the sleeve 2101.

[0106] It should be noted that if Figure 2 As shown, there is a preset angle between the side wall of the limiting groove 2102 and the axial direction, so that the side wall of the entire limiting groove 2102 forms a first limiting surface 2103; there is a preset angle between the side wall of the limiting block 320 and the axial direction, so that the side wall of the entire limiting block 320 forms a second limiting surface 3201. In addition, 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 that cooperate simultaneously.

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

[0108] By setting the preset angle to 15°-30°, the inclination angle of the first limit surface 2103 and the second limit surface 3201 can play both a guiding role and a pressing effect, avoiding the preset angle being too small or too large, which affects the reliability of the connection between the connecting component 30 and the sleeve 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 limit groove 2102 and the bottom surface of the limit block 320, space is reserved for the relative sliding between the limit block 320 and the limit groove 2102. Because as the knob 330 is continuously pressed down, the limit block 320 will move downward, so space needs to be reserved to avoid the bottom surface of the limit groove 2102 and the bottom surface of the limit block 320 from abutting against each other, so that the first limit surface 2103 and the second limit surface 3201 can have space for relative sliding, and can use relative sliding to produce a tightening effect, so that the contact between the first limit surface 2103 and the second limit surface 3201 is closer, and the connection between the sleeve 2101 and the connecting component 30 is more firmly fixed.

[0111] It should be noted that the bottom surface of the limiting groove 2102 is respectively connected to the two side walls of the limiting groove 2102, 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 respectively linked to the two side walls of the limiting block 320, 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 wind wheel 20 and a connecting assembly 30; the motor 10 includes a motor body and an output shaft 110 arranged on the motor body; the wind wheel 20 is sleeved on the output shaft 110 of the motor 10, and a limiting assembly 210 is provided on the side of the wind wheel 20 away from the motor body, and the limiting assembly 210 surrounds the output shaft 110; the connecting assembly 30 is provided on the output shaft 110 and is located on the side of the limiting assembly 210 away from the motor body, and the connecting assembly 30 cooperates with the limiting assembly 210 to fix the wind wheel 20 on the output shaft 110.

[0114] As can be seen from the above, by setting the limiting component 210 on the side of the wind wheel 20 away from the motor body and surrounding the output shaft 110, and setting the connecting component 30 on the side of the limiting component 210 away from the motor body, the coordination and installation process of the limiting component 210 and the connecting component 30 are all within the user's line of sight, avoiding the occurrence of blind spots due to obstruction by the wind wheel 20, the motor 10, etc. during installation. In addition, when the wind wheel 20 and the motor 10 are installed, the wind wheel 20 is first sleeved on the output shaft 110, and then the connecting component 30 is coordinated with the limiting component 210 and the connecting component 30 is connected to the output shaft 110, so that the wind wheel 20 can be installed from top to bottom. The installation is convenient and simple, and there is no blind spot in the entire installation process, which effectively avoids blind installation, thereby not only improving the reliability of the installation, but also reducing the reliability of inadequate installation, and ensuring the installation effect.

[0115] It should be noted that the wind wheel 20 includes an upper hub and a lower hub arranged relative to each other in the axial direction, and a fan blade arranged between the upper hub and the lower hub; the wind wheel 20 also includes a rotating shaft disk 220 arranged on the lower hub, wherein the limiting assembly 210 is arranged on the rotating shaft disk 220; in addition, the wind wheel 20 can be a centrifugal wind wheel 20, that is, the wind takes in axially and discharges radially, and uses centrifugal force (determined by the rotational speed and outer diameter) to do work to increase the pressure of the air.

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

[0117] By setting a shaft sleeve 2101 to provide a structural basis for the insertion of the output shaft 110, a plurality of limit grooves 2102 are set at the end of the shaft sleeve 2101 away from the motor body, ensuring that there is no blind spot when the limit groove 2102 and the connecting component 30 are installed in conjunction. Compared with the prior art in which the groove is set at the bottom of the centrifugal impeller 20, the present invention effectively avoids the situation of blind installation, thereby making installation easier.

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

[0119] It should also be noted that the shaft sleeve 2101 is provided on the rotating shaft disk 220 , and the shaft sleeve 2101 and the rotating shaft disk 220 are connected including but not limited to by welding or integral mold forming.

[0120] like Figure 1 、 Figure 3-Figure 6 As shown, in some embodiments, the connecting assembly 30 includes a connecting member 310, a plurality of limit blocks 320 and a knob 330; the connecting member 310 is adapted to the output shaft 110; the plurality of limit blocks 320 are arranged on the outer wall of the connecting member 310, the plurality of limit blocks 320 are arranged circumferentially around the connecting member 310, and the plurality of limit blocks 320 respectively correspond to the plurality of limit grooves 2102 one by one, and the limit blocks 320 are adapted to the corresponding limit grooves 2102; the knob 330 is connected to the output shaft 110, and the knob 330 abuts against the end of the connecting member 310 away from the sleeve 2101.

[0121] By cooperating with the limit block 320 and the limit groove 2102, the connector 310 and the limit assembly 210 are quickly aligned and limited by a plug-in connection method, and the installation is 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 sleeve 2101, thereby realizing a reliable connection between the knob 330, the connector 310 and the limit assembly 210, thereby firmly installing the wind wheel 20 on the output shaft 110 of the motor 10, and transmitting the power output by the motor 10 to the limit assembly 210, driving the limit assembly 210 and the wind wheel 20 to rotate.

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

[0123] It should also be noted that if Figure 4 As shown, the radial length of the limit block 320 is greater than the radial length of the limit slot 2102, and the axial length of the limit block 320 is greater than the axial length of the limit slot 2102, that is, the limit block 320 is higher than the limit slot 2102. This ensures that the knob 330 is in contact with the connector 310 and the limit block 320, and that the limit block 320 presses the sleeve 2101, thereby 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 a preset angle is formed between the first limiting surface 2103 and 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 a preset angle is formed between the second limiting surface 3201 and the axial direction, and the second limiting surface 3201 abuts against the first limiting surface 2103.

[0125] By setting the inclined first limit surface 2103 and the second limit surface 3201, it can not only play a guiding role during the installation process, making it convenient for the limit block 320 to be quickly aligned with the limit groove 2102 and inserted, but also the relative sliding of the first limit surface 2103 and the second limit surface 3201 can be utilized during installation to produce a clamping effect, so that the limit block 320 presses the sleeve 2101, thereby further improving the reliability of the connection between the connecting piece 310 and the sleeve 2101.

[0126] It should be noted that if Figure 2As shown, there is a preset angle between the side wall of the limiting groove 2102 and the axial direction, so that the side wall of the entire limiting groove 2102 forms a first limiting surface 2103; there is a preset angle between the side wall of the limiting block 320 and the axial direction, so that the side wall of the entire limiting block 320 forms a second limiting surface 3201. In addition, 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 that cooperate simultaneously.

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

[0128] By setting the preset angle to 15°-30°, the inclination angle of the first limit surface 2103 and the second limit surface 3201 can play both a guiding role and a pressing effect, avoiding the preset angle being too small or too large, which affects the reliability of the connection between the connecting component 30 and the sleeve 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 limit groove 2102 and the bottom surface of the limit block 320, space is reserved for the relative sliding between the limit block 320 and the limit groove 2102. Because as the knob 330 is continuously pressed down, the limit block 320 will move downward, so space needs to be reserved to avoid the bottom surface of the limit groove 2102 and the bottom surface of the limit block 320 from abutting against each other, so that the first limit surface 2103 and the second limit surface 3201 can have space for relative sliding, and can use relative sliding to produce a tightening effect, so that the contact between the first limit surface 2103 and the second limit surface 3201 is closer, and the connection between the sleeve 2101 and the connecting component 30 is more firmly fixed.

[0131] It should be noted that the bottom surface of the limiting groove 2102 is respectively connected to the two side walls of the limiting groove 2102, 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 respectively linked to the two side walls of the limiting block 320, 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 connecting member 310 is adapted to the positioning shaft segment 1101.

[0133] By setting the positioning shaft segment 1101 to be matched with the connecting piece 310, and setting a plurality of first positioning surfaces 1102 parallel to the axial direction on the positioning shaft segment 1101, a structural basis is provided for the connection of the connecting piece 310 and the positioning shaft segment 1101, avoiding sliding between the connecting piece 310 and the positioning shaft segment 1101, thereby improving the reliability of the connection, and enabling the connecting piece 310 to transmit the power output by the motor 10 to the limiting assembly 210.

[0134] It should be noted that the number of first positioning surfaces 1102 is set according to actual needs. For example, as shown in Figure 1 , the number of first positioning surfaces 1102 is two; in addition, the plurality of first positioning surfaces 1102 are arranged at equal intervals in the circumferential direction around the positioning shaft segment 1101.

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

[0136] By setting the first positioning surface 1102 to be matched with the second positioning surface 3102, the reliability of the shaft connection of the connecting piece 310 and the motor 10 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, as shown in Figure 3 , the number of second positioning surfaces 3102 is two; in addition, the plurality of second positioning surfaces 3102 are arranged at equal intervals in the circumferential direction around the positioning shaft segment 1101.

[0138] As shown in Figure 1 , in some embodiments, the output shaft 110 further includes a fixed shaft segment 1103, and the fixed shaft segment 1103 is provided with a left-hand thread to be connected with the knob 330; wherein the motor 10 drives the wind wheel 20 to rotate clockwise.

[0139] By providing a left-handed thread connected to the knob 330, the knob 330 can be tightened as the wind rotor 20 rotates clockwise, thereby more reliably fixing the wind rotor 20. In addition, because there is a gap between the bottom of the limit block 320 and the bottom of the limit slot 2102, and the width of the limit slot 2102 and the limit block 320 gradually decreases from top to bottom along the axial direction, as the knob 330 is continuously tightened, relative sliding occurs between the limit block 320 and the limit slot 2102, and the first limit surface 2103 and the second limit surface 3201 are in close contact, making the connection and fixation between the sleeve 2101 and the connecting member 310 more secure.

[0140] like Figure 8 As shown, in some embodiments, the fan structure also includes a volute 40, on which an air duct and an air inlet and an air outlet 410 respectively connected to the air duct are provided; wherein, the motor 10 is arranged on the volute 40, and the wind wheel 20 is arranged in 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 wind wheel 20 to rotate, providing power for the external air flow to flow from the air inlet to the air outlet 410.

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

[0143] Example 7

[0144] An embodiment of the present invention further provides a household appliance, comprising the fan structure of any embodiment of the present invention, thereby having 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 household appliances commonly used in kitchens. The motor 10 drives the wind wheel 20 to rotate to generate negative pressure, which sucks in indoor oil smoke. The oil smoke enters the air duct of the volute 40 and flows out through the air outlet 410.

[0146] While the present invention has been described with reference to preferred embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner, provided no structural conflicts exist. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions 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, disposed on the output shaft and located on a side of the limiting assembly away from the motor body, the connecting assembly cooperating with the limiting assembly to fix the wind wheel on the output shaft; The limiting component includes: a shaft sleeve, sleeved on the output shaft; and a plurality of limiting grooves, provided at one end of the shaft sleeve away from the motor body and extending in the axial direction, the plurality of limiting grooves being circumferentially spaced around the shaft sleeve, and the limiting grooves passing through the shaft sleeve in the radial direction; 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 connected to the output shaft, the knob abutting against an end of the connecting member away from the sleeve; 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.

2. The fan structure according to claim 1, 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.

3. The fan structure according to claim 2, characterized in that: The preset angle is 15°-30°.

4. The fan structure according to claim 2, characterized in that: There is a gap between the bottom surface of the limiting groove and the bottom surface of the limiting block.

5. The fan structure according to claim 1, 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.

6. The fan structure according to any one of claims 1 to 5, 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.

7. The fan structure according to any one of claims 1 to 5, characterized in that: The fan structure further comprises a volute, on which an air duct and an air inlet and an air outlet respectively connected to the air duct are provided; 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.

8. A household appliance, characterized in that: The invention comprises a fan structure as claimed in any one of claims 1 to 7.

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