A motor mounting bracket, a fan assembly and an air purifier

Abstract

The present invention relates to the technical field of motor shock absorption, and particularly relates to a motor mounting bracket, a fan assembly and an air purifier. The motor mounting bracket includes: a bushing, with a through hole formed inside; a bearing, directly or indirectly assembled and connected with the bushing, and a positioning shaft hole is formed inside the bearing in a direction parallel to the axis of the through hole; at least a partial area of the outer edge of the bushing is provided with a bushing flange, and a fixing position is formed on the bushing flange. The motor mounting bracket provided by the present invention is provided with a bushing flange at least in a partial area along the outer edge of the bushing, and a fixing position is formed on the bushing flange, so that the motor mounting bracket can be fixed through the fixing position. When the motor mounting bracket is fixed, the motor shaft can rotate in the motor mounting bracket along a specific axis without relative shaking, ensuring the stable operation of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of motor shock absorption, and particularly relates to a motor mounting bracket, a fan assembly and an air purifier. Background Art

[0002] In the prior art, air purifiers usually adopt a form in which the motor and the wind wheel are vertically placed. In order to effectively reduce vibration and noise, the motor is usually fixed unilaterally, and shock-absorbing rubber pads are provided at both the upper and lower ends of the motor housing. In this setting form, during the long-term high-speed operation of the motor, the rubber pads are continuously worn due to vibration, the motor shakes more, the eccentricity of the wind wheel increases, resulting in the wind wheel rubbing against the volute and generating noise. On the other hand, due to installation requirements, when the motor and the wind wheel need to be horizontally installed, the wind wheel and the motor are horizontally placed. The wind wheel is generally large and has a heavy self-weight. Therefore, when the wind wheel and the motor are horizontally placed, due to the self-weight of the wind wheel and the elasticity of the shock-absorbing pad, the motor shaft tilts downward, so the radial shaking of the wind wheel during rotation and rubbing against the volute will be more obvious. In addition, for engineering air purifiers, their working environment is different from that of household air purifiers, such as in vehicles, elevators, etc. Such air purifiers have a large movement amplitude, and the long-term vibration working environment has a more serious impact on the motor, and the external vibration affects the eccentricity of the wind wheel even more, making the hidden danger of friction generating noise greater. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the motor shakes greatly and is prone to generate noise in the prior art, so as to provide a motor mounting bracket that reduces motor shaking and reduces noise.

[0004] The technical problem to be solved by the present invention is to overcome the defect that the motor shakes greatly and is prone to cause friction of the wind wheel in the prior art, so as to provide a fan assembly that reduces motor shaking and thus reduces wind wheel friction.

[0005] Another technical problem to be solved by the present invention is to overcome the defect that the motor shakes greatly and is prone to cause friction of the wind wheel in the prior art, so as to provide an air purifier that reduces motor shaking and thus reduces wind wheel friction and reduces noise.

[0006] To solve the above technical problems, a motor mounting bracket provided by the present invention includes:

[0007] A bushing, having a through hole formed therein;

[0008] A bearing, directly or indirectly assembled and connected with the bushing, and a positioning shaft hole is formed in the bearing in a direction parallel to the axis of the through hole;

[0009] At least a partial area of the outer edge of the bushing is provided with a bushing convex edge, and a fixing position is formed on the bushing convex edge.

[0010] Further, it further includes:

[0011] A number of radially arranged brackets, one end of the bracket is connected to the fixed position, and the bracket extends along a direction away from the bushing;

[0012] The bracket includes an extension part, and the extension part is configured as a rod-shaped structure.

[0013] Further, a first fixing part is formed at one end of the extension part, and the first fixing part is fixedly connected to the convex edge of the bushing; a second fixing part is formed at the other end of the extension part, and a mounting hole is formed on the second fixing part.

[0014] Further, the plane where the extension part is located is arranged parallel to or at an acute angle to the axial direction of the through hole.

[0015] Further, there are three brackets, and the three brackets are evenly distributed circumferentially outside the bushing.

[0016] Further, it further includes:

[0017] A bearing housing, sleeved inside the bushing; a bearing placement cavity is formed inside the bearing housing, and the bearing placement cavity is adapted to snap-fit the bearing.

[0018] Further, the diameters of both ends of the bearing placement cavity along the axial direction are smaller than the maximum inner diameter of the bearing placement cavity.

[0019] Further, a support step is formed inside the bushing, and the bearing housing is correspondingly provided with a bearing housing step, and the support step abuts against the bearing housing step.

[0020] Further, a buckle is also provided on the bearing housing, and the buckle and the bearing housing step are axially clamped on opposite sides of the support step together.

[0021] Further, the bearing housing is made of an elastic material.

[0022] The fan assembly provided by the present invention includes:

[0023] A volute;

[0024] A motor, with a motor shaft extending from the motor;

[0025] An impeller, the motor shaft passes through the rotation axis of the impeller; and the motor mounting bracket as described above;

[0026] The motor mounting bracket is directly or indirectly fixed on the volute, and the motor shaft is assembled and connected with the positioning shaft hole of the bearing.

[0027] Furthermore, a boss is provided on the volute, and the boss is suitable for connecting to the second fixing portion of the motor mounting bracket.

[0028] Furthermore, a boss rib is provided on at least one side of the boss, and the boss rib is suitable for installing and positioning the motor mounting bracket.

[0029] The air purifier provided by the present invention includes: the fan assembly as described above.

[0030] The technical solution of the present invention has the following advantages:

[0031] 1. The motor mounting bracket provided by the present invention is provided with a sleeve flange along at least a portion of the outer edge of the sleeve, and a fixing position is formed on the sleeve flange, so that the motor mounting bracket can be fixed by the fixing position, so that when the motor mounting bracket is fixed, the motor shaft can rotate along a specific axis in the motor mounting bracket without relative shaking, thereby ensuring the smooth operation of the motor.

[0032] 2. The motor mounting bracket provided by the present invention is fixedly connected to the shaft sleeve, specifically fixedly connected to the shaft sleeve flange through the mounting hole on the first fixing portion, and the installation position of the motor mounting bracket is extended by extending the extension portion, and the motor mounting bracket can be fixed without being fixed at the fixing position formed on the shaft sleeve flange, so that the motor mounting bracket can be reasonably designed according to the actual working conditions, without increasing the size of the shaft sleeve flange, thereby saving materials.

[0033] 3. The motor mounting bracket provided by the present invention includes three brackets, and the three brackets are evenly distributed on the outside of the shaft sleeve along the circumferential direction, so that the three brackets evenly share the force of the shaft sleeve, and on the basis of ensuring the smooth installation of the shaft sleeve, the number of brackets is reduced to reduce the cost; in addition, the use of three brackets can reduce the difficulty of leveling and ensure the assembly accuracy of the shaft sleeve in the installed state.

[0034] 4. The motor mounting bracket provided by the present invention has a bearing seat arranged between the shaft sleeve and the bearing, and the bearing seat is made of elastic material, so that the bearing seat can buffer and absorb the vibration during the rotation of the motor shaft, thereby reducing the shaking of the motor shaft while improving the fault tolerance rate.

[0035] 5. The motor mounting bracket provided by the present invention provides a bearing seat step and a buckle on the bearing seat, so that the bearing seat can form a snap connection with the shaft sleeve, ensuring that the bearing seat and the shaft sleeve will not loosen in the axial direction after being assembled.

[0036] 6. The fan assembly provided by the present invention has a motor shaft extending from the motor, and the motor shaft is arranged through the rotation axis of the wind wheel; after the motor shaft passes through the wind wheel, the end away from the motor is assembled and connected with the positioning shaft hole of the bearing; and by directly or indirectly fixing the motor mounting bracket on the volute, it is ensured that both ends of the motor, especially both ends of the motor shaft, are in a connected state, ensuring the assembly stability of the motor by the motor mounting bracket, preventing the motor shaft from moving axially in the radial direction, reducing the shaking of the motor, reducing the eccentricity of the wind wheel, and preventing the wind wheel from rubbing against the volute, thereby reducing the generation of noise.

[0037] 7. The air purifier provided by the present invention adds a motor mounting bracket at the end of the motor. By fixing both ends of the electrode shaft, it ensures the stable operation of the motor, reduces the shaking of the wind wheel, thereby reducing the potential risk of noise generated by the wind wheel rubbing against the volute, improving the user experience, and enabling the product to meet different installation requirements and usage environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0039] Figure 1 It is a schematic diagram of the installation position of the fixing bracket and the volute of the present invention;

[0040] Figure 2 For Figure 1 the partial enlarged view in;

[0041] Figure 3 It is a schematic cross-sectional view of the installation state of the fixing bracket of the present invention;

[0042] Figure 4 For Figure 3 the partial enlarged view in;

[0043] Figure 5 It is a schematic diagram of the installation state of the mounting bracket of the present invention;

[0044] Figure 6 It is a schematic diagram of the disassembled state of the mounting bracket of the present invention;

[0045] Figure 7 It is a cross-sectional view of the mounting bracket of the present invention;

[0046] Figure 8 It is a cross-sectional view of the mating state of the bearing seat and the shaft sleeve of the present invention;

[0047] Figure 9 Schematic diagram of the deformation of the mounting bracket Figure 1 ;

[0048] Figure 10 Schematic diagram of the deformation of the mounting bracket Figure 2 ;

[0049] Figure 11 Schematic diagram of the deformation of the mounting bracket Figure 3 .

[0050] Explanation of the reference numerals in the drawings:

[0051] 10 - volute, 11 - boss, 12 - boss rib, 20 - motor mounting bracket, 21 - bushing, 211 - through hole, 212 - bushing flange, 213 - support step, 214 - fixing position, 22 - bracket, 221 - first fixing part, 222 - extension part, 223 - second fixing part, 23 - bearing housing, 231 - bearing placement cavity, 232 - bearing housing step, 233 - buckle, 24 - bearing, 241 - positioning shaft hole, 25 - fixing part; 30 - motor, 31 - motor shaft, 40 - impeller, 41 - impeller rotating seat. Detailed implementation manners

[0052] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0053] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0054] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0055] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0056] Example 1

[0057] Combine Figures 5 - 8 As shown, the motor mounting bracket provided in this embodiment includes:

[0058] The shaft sleeve 21 has a through hole 211 formed therein;

[0059] The bearing 24 is directly or indirectly assembled with the sleeve 21, and a positioning shaft hole 241 is formed inside the bearing 24 in a direction parallel to the axis of the through hole;

[0060] At least a portion of the outer edge of the sleeve 21 is provided with a sleeve flange 212 , and a fixing position 214 is formed on the sleeve flange 212 .

[0061] Preferably, the shaft sleeve 21 is constructed as a cylindrical structure, and its interior is hollow along the axial direction to form the through hole 211. Preferably, the shaft sleeve 21 is constructed as a thin-walled structure.

[0062] Preferably, the sleeve flange 212 extends in the radial direction along the outer surface of the sleeve 21, and the sleeve flange 212 is arranged around the sleeve 21; preferably, the sleeve flange 212 is arranged at one end of the sleeve 21 along the axial direction.

[0063] The bearing 24 is arranged in the sleeve 21, and the bearing 24 can rotate relative to the sleeve 21, and its rotation axis is the same as the axis of the positioning shaft hole 241; the positioning shaft hole 241 set in the bearing 24 is suitable for connecting with the motor shaft, so that the motor mounting bracket can position one end of the motor shaft and enable the motor shaft to rotate relative to the motor mounting bracket.

[0064] The motor mounting bracket provided in this embodiment is provided with a sleeve flange 212 along at least a portion of the outer edge of the sleeve 21, and a fixing position 214 is formed on the sleeve flange 212, so that the motor mounting bracket can be fixed by the fixing position 214, so that when the motor mounting bracket is fixed, the motor shaft can rotate along a specific axis in the motor mounting bracket without relative shaking, thereby ensuring the smooth operation of the motor.

[0065] Preferably, the fixing position 214 may be a fixing hole, and the shaft sleeve 21 is fixed to the external structure through a fixing member 25. Preferably, the fixing member 25 may be a screw or a blind rivet.

[0066] Specifically, the motor mounting bracket further includes:

[0067] A number of radially arranged brackets 22, one end of the bracket 22 is connected to the fixed position 214, and the bracket 22 extends in a direction away from the bushing 21;

[0068] The bracket 22 includes an extension portion 222, and the extension portion 222 is configured as a rod-shaped structure.

[0069] Specifically, a first fixing portion 221 is formed at one end of the extension portion 222, and the first fixing portion 221 is fixedly connected to the bushing flange 212; a second fixing portion 223 is formed at the other end of the extension portion 222, and a mounting hole is formed on the second fixing portion 223.

[0070] Preferably, the extension portion 222 is configured as a rod-shaped structure, the first fixing portion 221 and the second fixing portion 223 are respectively arranged on both sides of the extension portion 222 along the length direction, and mounting holes are provided on both the first fixing portion 221 and the second fixing portion 223.

[0071] Preferably, in this embodiment, both ends of the bracket 22 are bent in an L shape, so that the extension portion 222 is perpendicular to the first fixing portion 221 and / or the second fixing portion 223.

[0072] In the motor mounting bracket provided in this embodiment, the bracket 22 is fixedly connected to the bushing 21. Specifically, it is fixedly connected to the bushing flange 212 through the mounting hole on the first fixing portion 221, and through the extension of the extension portion 222, the mounting position of the motor mounting bracket is extended. Without fixing on the fixed position 214 formed on the bushing flange 212, the fixation of the motor mounting bracket can be achieved, enabling the motor mounting bracket to be reasonably designed according to actual working conditions without expanding the size of the bushing flange 212, thus saving materials.

[0073] Specifically, the plane where the extension portion 222 is located is parallel or at an acute angle to the axial direction of the through hole 211.

[0074] Preferably, after the motor mounting bracket and the motor are assembled, a wind wheel is also sleeved on the motor shaft. When the motor and the wind wheel are placed vertically, during the rotation of the wind wheel, the direction of the air flow guided is the same as the axial direction of the motor shaft. At this time, to reduce the air volume loss, the plane where the extension portion 222 is located is parallel or at an acute angle to the axial direction of the through hole 211, thereby reducing the space occupied by the extension portion 222, ensuring the air intake volume, and reducing the resistance.

[0075] As a preferred embodiment of this solution, the brackets 22 include three, and the three brackets 22 are evenly distributed outside the shaft sleeve 21 along the circumferential direction.

[0076] The motor mounting bracket provided in this embodiment includes three brackets 22, and the three brackets 22 are evenly distributed on the outside of the shaft sleeve 21 along the circumferential direction, so that the three brackets 22 evenly share the force of the shaft sleeve 21, and on the basis of ensuring the smooth installation of the shaft sleeve 21, the number of brackets 22 is reduced to reduce costs; in addition, the use of three brackets 22 can reduce the difficulty of leveling and ensure the assembly accuracy of the shaft sleeve 21 in the installed state.

[0077] As a variation, the bracket 22 may further include multiple brackets, preferably multiple brackets 22 are evenly distributed outside the sleeve 21 along the circumferential direction.

[0078] Specifically, the motor mounting bracket further includes:

[0079] The bearing seat 23 is sleeved and disposed inside the shaft sleeve 21 ; a bearing placement cavity 231 is formed inside the bearing seat 23 , and the bearing placement cavity 231 is suitable for clamping the bearing 24 .

[0080] Specifically, the bearing seat 23 is made of an elastic material. Preferably, the bearing seat 23 is made of an elastic rubber or plastic material.

[0081] Preferably, the bearing seat 23 is constructed as a hollow cylindrical structure.

[0082] Preferably, the bearing seat 23 is connected to the shaft sleeve 21 by interference fit.

[0083] The motor mounting frame provided in this embodiment is configured with a bearing seat 23 between the shaft sleeve 21 and the bearing 24, and the bearing seat 23 is made of an elastic material, so that the bearing seat 23 can buffer and absorb vibrations during the rotation of the motor shaft, thereby reducing the shaking of the motor shaft and improving the fault tolerance rate.

[0084] The bearing 24 is disposed in the bearing placement cavity 231 . Preferably, the bearing 24 and the bearing seat 23 are interference fit, so that the bearing 24 remains in an assembled state in the bearing seat 23 without deformation.

[0085] Preferably, the rotation axis of the bearing 24 and the central axis of the bearing seat 23 are the same as the central axis of the positioning shaft hole 241 of the sleeve 21, thereby ensuring assembly accuracy and improving precision.

[0086] Specifically, combined Figure 8As shown, the diameters of both ends of the bearing placement cavity 231 in the axial direction are smaller than the maximum internal diameter of the bearing placement cavity 231. Thus, the bearing 24 is installed into the bearing placement cavity 231 by extrusion, ensuring the firmness of the assembly and preventing the bearing 24 from loosening from the bearing seat 23.

[0087] Specifically, a support step 213 is formed inside the bushing 21, and a bearing seat step 232 is correspondingly provided on the bearing seat 23, and the support step 213 abuts against the bearing seat step 232.

[0088] Specifically, a buckle 233 is further provided on the bearing seat 23, and the buckle 233 and the bearing seat step 232 are axially clamped on opposite sides of the support step 213 together.

[0089] Preferably, the distance between the bearing seat step 232 and the buckle 233 is equal to the length of the support step 213 in the axial direction, thereby ensuring the assembly accuracy of the bearing seat 23 and the bushing 21.

[0090] For the motor mounting bracket provided in this embodiment, by providing the bearing seat step 232 and the buckle 233 on the bearing seat 23, the bearing seat 23 can be snap-connected to the bushing 21, ensuring that the bearing seat 23 and the bushing 21 do not become loose in the axial direction after assembly.

[0091] Preferably, wrinkles are further provided at the contact position between the outer surface of the bearing seat 23 and the bushing 21. By providing the wrinkles, the outer surface of the bearing seat 23 is elastically connected to the inner surface of the bushing 21, having a certain buffer space and increasing the friction force in the assembled state to prevent relative rotation.

[0092] Embodiment Two

[0093] Combined with Figure 9 As shown, this embodiment is a deformed structure of the motor mounting bracket provided in the above Embodiment One. The difference from the above embodiment is that the L-shaped bending structures at both ends of the bracket 22 are cancelled, and flanges are added at both ends of the extension part 222, thereby strengthening the structural strength of the bracket 22.

[0094] Preferably, the flanges are on the same side of the plane where the extension part 222 is located.

[0095] Embodiment Three

[0096] Combined with Figure 10As shown in the figure, this embodiment is a deformed structure of the motor mounting bracket provided in the above-mentioned first embodiment. The difference from the above-mentioned embodiment is that the extension part 222 of the bracket 22 is constructed as a plate-like structure, and the plane where the plate-like structure of the extension part 222 is located is perpendicular to the axial direction of the through hole 211.

[0097] Preferably, flanges are formed on both side edges of the plate-like structure of the extension part 222 in the width direction, so as to increase the structural strength of the bracket 22.

[0098] Preferably, ventilation holes are formed on the plate-like structure of the extension part 222, so as to reduce wind resistance.

[0099] Embodiment Four

[0100] Combined with Figure 11 As shown in the figure, this embodiment is a deformed structure of the motor mounting bracket provided in the above-mentioned first embodiment. The difference from the above-mentioned embodiment is that the bracket 22 and the bushing 21 are of an integral structure. Preferably, the integral structure of the bracket 22 and the bushing 21 is manufactured by an injection molding method. Thus, the assembly process of the bracket 22 and the bushing 21 is reduced, the labor intensity is lowered, and the processing efficiency is improved.

[0101] Embodiment Five

[0102] Combined with Figures 1 - 4 As shown in the figure, the fan assembly provided in this embodiment includes:

[0103] Volute 10;

[0104] Motor 30, with a motor shaft 31 extending therefrom;

[0105] Wind wheel 40, the motor shaft 31 is arranged through the rotation axis of the wind wheel 40; and the motor mounting bracket 20 as described above;

[0106] The motor mounting bracket is directly or indirectly fixed on the volute 10, and the motor shaft 31 is assembled and connected with the positioning shaft hole 241 of the bearing 24.

[0107] The fan assembly provided in this embodiment has a motor shaft 31 extending from the motor 30, and the motor shaft 31 is arranged to pass through the rotation axis of the wind wheel 40; after the motor shaft 31 passes through the wind wheel 40, the end thereof away from the motor 30 is assembled and connected with the positioning shaft hole 241 of the bearing 24; and by directly or indirectly fixing the motor mounting bracket to the volute 10, it is ensured that both ends of the motor, especially both ends of the motor shaft 31, are in a connected state, ensuring the smooth assembly of the motor mounting bracket to the motor 30, avoiding the motor shaft 31 from moving in the radial direction, reducing motor shaking, reducing the eccentricity of the wind wheel, and avoiding the wind wheel from rubbing against the volute, thereby reducing noise generation.

[0108] Preferably, the motor shaft 31 and the wind wheel 40 are fixedly connected via a wind wheel rotating seat 41 to ensure that the motor shaft 31 and the wind wheel 40 are in a synchronous motion state.

[0109] As a variation, when the fan assembly needs to be placed horizontally due to installation requirements, the wind wheel and the motor are placed horizontally. At this time, due to the setting of the motor mounting bracket 20, the weight of the wind wheel itself and the elasticity of the shock-absorbing pad can prevent the motor shaft from tilting downward, reducing the radial shaking of the wind wheel and the friction against the volute, thereby reducing the generation of noise.

[0110] Specifically, a boss 11 is provided on the volute 10 , and the boss 11 is suitable for fixing the motor mounting bracket; and preferably, the boss 11 is connected to the second fixing portion 223 of the motor mounting bracket.

[0111] Preferably, a mounting hole is provided on the boss 11 , which is suitable for being fixed with the mounting hole formed on the second fixing portion 223 , thereby ensuring a fixed connection between the bracket 22 and the volute 10 .

[0112] Preferably, a plurality of bosses 11 are provided on the volute 10 ; preferably, the number of the bosses 11 matches the number of the brackets 22 .

[0113] Specifically, at least one side of the boss 11 is provided with a boss rib 12, which is suitable for positioning the motor mounting bracket, thereby facilitating alignment of the mounting hole on the boss 11 with the mounting hole of the second fixing portion 223, reducing alignment time and improving installation efficiency.

[0114] Embodiment 6

[0115] This embodiment provides an air purifier, including the fan assembly as described above.

[0116] The air purifier provided in this embodiment adds a motor mounting bracket at the end of the motor and fixes the two ends of the electrode shaft to ensure the smooth operation of the motor, reduce the shaking of the wind wheel, and thus reduce the hidden danger of noise generated by the wind wheel rubbing against the volute, improve user experience, and enable the product to meet different installation requirements and usage environments.

[0117] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A motor mounting bracket, characterized in that, Comprising: A bushing (21) having a through-hole (211) formed therein; A bearing (24) assembled and connected to the bushing (21) directly or indirectly, and a positioning shaft hole (241) is formed in the bearing (24) in a direction parallel to the axis of the through-hole; At least a part of the outer edge of the bushing (21) is provided with a bushing flange (212), and a fixing position (214) is formed on the bushing flange (212); Further comprising: A bearing housing (23) sleeved inside the bushing (21); a bearing placement cavity (231) is formed inside the bearing housing (23), and the bearing placement cavity (231) is adapted to snap-fit the bearing (24); The diameters of both ends of the bearing placement cavity (231) in the axial direction are smaller than the maximum inner diameter of the bearing placement cavity (231); A support step (213) is formed inside the bushing (21), and a bearing housing step (232) is correspondingly provided on the bearing housing (23), and the support step (213) abuts against the bearing housing step (232); A buckle (233) is further provided on the bearing housing (23), and the buckle (233) and the bearing housing step (232) are axially clamped on opposite sides of the support step (213) together; A wrinkle is further provided at the position where the outer surface of the bearing housing (23) contacts the bushing (21), and further comprising: A plurality of radially arranged brackets (22), one end of the bracket (22) is connected to the fixing position (214), and the bracket (22) extends in a direction away from the bushing (21); The bracket (22) includes an extension part (222), the extension part (222) is configured as a rod-shaped structure, a first fixing part (221) is formed at one end of the extension part (222), and the first fixing part (221) is fixedly connected to the bushing flange (212); a second fixing part (223) is formed at the other end of the extension part (222), and a mounting hole is formed on the second fixing part (223), both ends of the bracket (22) are bent in an L shape, and the extension part (222) is perpendicular to the first fixing part (221) and / or the second fixing part (223); The plane where the extension part (222) is located is arranged at an acute angle with the axial direction of the through-hole (211). During the rotation of the wind wheel, the direction of guiding the air flow is the same as the axial direction of the motor shaft.

2. The motor mounting bracket according to claim 1, characterized in that, The bracket (22) includes three, and the three brackets (22) are evenly distributed outside the bushing (21) in the circumferential direction.

3. The motor mounting bracket according to claim 1, characterized in that, The bearing housing (23) is made of an elastic material.

4. A fan assembly, characterized in that, Comprising: A volute (10); A motor (30) with a motor shaft (31) extending therefrom; A wind wheel (40) through which the motor shaft (31) passes along the rotation axis thereof; and a motor mounting bracket as described in any one of claims 1-3 above; The motor mounting bracket is directly or indirectly fixed on the volute (10), and the motor shaft (31) is assembled and connected to the positioning shaft hole (241) of the bearing (24).

5. The fan assembly according to claim 4, characterized in that, A boss (11) is provided on the volute (10), and the boss (11) is adapted to connect to a second fixing portion (223) of the motor mounting bracket.

6. The fan assembly according to claim 5, wherein, At least one side of the boss (11) is provided with a boss edge (12), and the boss edge (12) is adapted to position the installation of the motor mounting bracket.

7. An air purifier, characterized in that, It includes a fan assembly according to any one of the above claims 4-6.

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