CN215444468U

CN215444468U - High stability fan

Info

Publication number: CN215444468U
Application number: CN202120993776.3U
Authority: CN
Inventors: 张震坚; 庞广陆
Original assignee: Inatsu Electric Zhuhai Co ltd
Current assignee: Inatsu Electric Zhuhai Co ltd
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2022-01-07
Anticipated expiration: 2031-05-10

Abstract

The utility model provides a high-stability fan which comprises a shell, a motor and a bearing assembly, wherein an output shaft of the motor is connected to the connecting inner wall of the shell through the bearing assembly, the bearing assembly comprises at least two bearings, each bearing comprises an inner wheel and an outer wheel, the inner wheels are connected with the output shaft of the motor, the outer wheels are connected with the connecting inner wall of the shell, and adjacent bearings are connected through a bearing part. According to the utility model, the motor output shaft is connected with the shell through the bearing assembly, the bearing assembly comprises at least two bearings and a bearing part for connecting the bearings, pre-tightening force is applied to two adjacent bearings through the bearing part, wherein the bearing part can be an independent shaft sleeve or an annular boss integrally formed with the shell, the bearing part is made of harder materials and is not easy to deform, the consistency of the pre-tightening force of the bearings is improved through the external pre-tightening mode, the pre-tightening force tolerance is reduced, and the service life is prolonged.

Description

High stability fan

Technical Field

The utility model belongs to the technical field of fans, and particularly relates to a high-stability fan.

Background

In the existing fan, generally, the pre-tightening mode among the bearings is spring constant pressure pre-tightening, which can cause poor consistency and stability of the pre-tightening force of the bearings due to individual difference of the springs, diversity of stress loads and other reasons, and the tolerance of the pre-tightening force is large, such as damage of the bearings caused by too large pre-tightening force, and adverse effects of rotor vibration, noise and the like caused by too small pre-tightening force. With the increasing demand of consumers for high-speed fans, for example, in the field of dust collectors, consumers want to have large suction force, small volume and stable operation of the dust collectors, so that the fans need to drive large fan blades at high rotating speed and maintain high stability as core parts of the dust collectors, and the traditional bearing pre-tightening mode of pre-tightening by using a spring at a constant pressure cannot meet the demand.

Therefore, a high stability fan with reliable pre-tightening and stable operation is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art, provides a high-stability fan and solves the problems of unreliable bearing pre-tightening mode and poor operation stability of the fan in the prior art.

The utility model provides a high-stability fan which comprises a shell, a motor and a bearing assembly, wherein an output shaft of the motor is connected to the connecting inner wall of the shell through the bearing assembly, the bearing assembly comprises at least two bearings, the bearings comprise an inner wheel and an outer wheel, the inner wheel is connected with the output shaft of the motor, the outer wheel is connected with the connecting inner wall of the shell, and adjacent bearings are connected through a bearing part.

In some embodiments, the bearing assembly comprises first and second bearings, the sockets abutting outer wheels of the first and second bearings respectively.

In some embodiments, the receiving portion is a sleeve, an outer diameter of the sleeve is the same as outer diameters of outer wheels of the first bearing and the second bearing, and the first bearing, the second bearing and the sleeve are respectively in close contact with a connecting inner wall of the housing.

In some embodiments, the receiving portion is integrally formed with the housing, the receiving portion is an annular boss on the inner connecting wall of the housing, and upper and lower end surfaces of the annular boss are respectively abutted to outer rings of the first bearing and the second bearing.

In some embodiments, the bearing assembly further comprises a pre-tightening device fixed on the output shaft of the motor, and the pre-tightening device abuts against the inner wheel of the first bearing and/or the second bearing and applies pre-tightening force along the direction of the output shaft of the motor.

In some embodiments, the bearing assembly includes a first bearing and a second bearing, the upper end and the lower end of the receiving portion are respectively provided with a limiting buckle, the first bearing and the second bearing are respectively clamped in the limiting buckles, and the receiving portion is in close contact with the connecting inner wall of the housing.

In some embodiments, the limit buckle is provided with an inclined reverse buckling part, and the reverse buckling part is abutted with the inner wheel of the first bearing and/or the second bearing and applies pre-tightening force along the direction of the output shaft of the motor.

The utility model has the beneficial effects that:

the utility model provides a high-stability fan, wherein a motor output shaft is connected with a shell through a bearing assembly, the bearing assembly comprises at least two bearings and a bearing part for connecting the bearings, pretightening force is applied to the two adjacent bearings through the bearing part, the bearing part can be an independent shaft sleeve or an annular boss integrally formed with the shell, the bearing part is made of harder materials and is not easy to deform, the consistency of the pretightening force of the bearings is improved through the external pretightening mode, the pretightening force tolerance is reduced, and the service life is prolonged.

Drawings

The utility model is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the utility model, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.

Fig. 1 is a schematic partial sectional structure diagram of a high-stability fan disclosed by the utility model.

Fig. 2 is a schematic structural view of a high stability fan disclosed in embodiment 1 in a state where a bearing assembly is mounted.

Fig. 3 is a schematic structural view of a bearing assembly in a high stability blower disclosed in embodiment 1.

Fig. 4 is a schematic structural diagram of a bearing in a high-stability fan disclosed by the utility model.

Fig. 5 is a schematic structural view of a bearing in a high stability blower disclosed in embodiment 2.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Referring to fig. 1 to 5, in an embodiment of the present disclosure, there is provided a high stability fan, including a housing 1, a motor 2, and a bearing assembly 3, wherein an output shaft 4 of the motor 2 is connected to an inner connecting wall 5 of the housing 1 through the bearing assembly 3, the bearing assembly 3 includes at least two bearings, the bearings include an inner wheel 6 and an outer wheel 7, the inner wheel 6 is connected to the motor output shaft 4, the outer wheel 7 is connected to the inner connecting wall 5 of the housing 1, wherein there is no relative sliding between the inner wheel 6 and the motor output shaft 4, there is no relative sliding between the outer wheel 7 and the inner connecting wall 5 of the housing 1, and adjacent bearings are connected through a receiving portion.

It should be noted that, no matter in a high-speed operation state or a low-speed operation state, in order to improve the operation stability of the fan and improve the stress condition of the bearings, in this embodiment, the motor output shaft 4 is connected with the connecting inner wall 5 of the housing 1 through the bearing assembly 3, wherein the connecting inner wall 5 of the housing 1 is a smooth cylindrical inner wall surface, after the motor output shaft 4 passes through the connecting inner wall surface, the other end is connected with the fan blade 11, the bearing assembly 3 includes at least two bearings and a bearing part for connecting the bearings, the bearing part is simultaneously connected with two adjacent bearings and applies a pretightening force to the bearings, because the bearing part has a certain hardness strength, the deformation does not occur during the operation of the motor 2 and the fan blade 11, the bearing stress stability is ensured, the bearings do not displace or deform during the operation, and abnormal vibration and noise do not occur during the transmission process, and the operation reliability and stability are improved.

In the present embodiment, the structural form of the bearing and the receiving portion in the bearing assembly 3 can be divided into the following two embodiments.

Example 1:

in the present embodiment 1, the bearing unit is a separate sleeve 8, and referring to fig. 2 to 4, as an embodiment, the bearing assembly 3 includes a first bearing 31 and a second bearing 32, each of the first bearing 31 and the second bearing 32 has an inner ring 6 and an outer ring 7, the inner ring 6 and the outer ring 7 are connected by balls 9, the sleeve 8 abuts against the outer rings 7 of the first bearing 31 and the second bearing 32, respectively, and the sleeve 8 is in an elongated annular shape and abuts against the outer rings 7 of the first bearing 31 and the second bearing 32 at upper and lower ends, respectively.

Preferably, the outer diameter of the shaft sleeve 8 is the same as the outer diameter of the outer wheel 7 of the first bearing 31 and the second bearing 32, that is, the outer surfaces of the shaft sleeve 8, the first bearing 31 and the second bearing 32 are a smooth plane, the first bearing 31, the second bearing 32 and the shaft sleeve 8 are respectively in close contact with the inner connecting wall 5 of the housing 1, and the three outer surfaces are all in close connection with the inner connecting wall 5, so that the stability is improved.

Example 2:

in embodiment 2, referring to fig. 5, the receiving portion is an annular boss 11 formed integrally with the housing 1, the annular boss 11 is provided on the connecting inner wall 5 of the housing 1 and extends in the axial direction, the upper and lower end faces of the annular boss 11 are respectively in contact with the outer rings 7 of the first bearing 31 and the second bearing 32, and the annular boss 11 functions as the sleeve 8 to improve stability.

As an embodiment, the bearing assembly 3 further includes a pre-tightening device, the pre-tightening device is fixed on the motor output shaft 4, the pre-tightening device abuts against the inner wheel 6 of the first bearing 31 and/or the second bearing 32 and applies a pre-tightening force along the direction of the motor output shaft 4, that is, under the pre-tightening action of the shaft sleeve 8 or the annular boss 11 on the outer wheel 7 of the bearing, the pre-tightening device also applies a pre-tightening force to the inner wheel 6, the direction of the pre-tightening force is towards the other bearing, that is, the pre-tightening force of the inner wheel 6 of the first bearing 31 is towards the second bearing 32, so that a fixed pre-tightening force is formed between the inner wheel 7 and the outer wheel 7 of the bearing by means of a contact angle of the balls 9, the bearing is ensured not to deflect and vibrate under the high-speed operation, and the operation stability and reliability of the system are improved.

As another kind of embodiment, the bearing assembly includes first bearing and second bearing, both ends are equipped with spacing buckle respectively about the accepting part, first bearing and second bearing joint respectively in spacing buckle, the outer wall of accepting part and the inner wall in connection of casing in close contact with, in this embodiment, the accepting part wraps up in first bearing and second bearing respectively in, all realize fixedly through the spacing buckle in the axle sleeve, when first bearing and second bearing card enter spacing buckle in, its interior wheel and motor output shaft, the foreign steamer is connected with the inner wall of accepting part, whole bearing assembly forms a whole like this, first bearing, second bearing and accepting part are all fixed together, good structural stability has.

Preferably, the limit buckle is provided with an inclined reversing part, the reversing part is abutted against the inner wheel of the first bearing and/or the second bearing and applies pretightening force along the direction of the output shaft of the motor, for the bearing part, the reversing part is more inwardly gathered than the limit buckle at the outermost edge, namely, the limit buckle extends a distance after clamping the end part of the outer wheel of the bearing, and then the reversing part extends inwards, the reversing part is abutted against the inner wheel, so that the inner wheel is subjected to pretightening force, similarly, the pretightening force is in the direction towards the other bearing, namely, the pretightening force of the inner wheel of the first bearing is in the direction towards the second bearing, so that a fixed pretightening force is formed between the inner wheel and the outer wheel of the bearing by virtue of a ball contact angle, the bearing is ensured not to generate deflection and vibration under high-speed operation, and the operation stability and reliability of the system are improved.

Compared with the prior art, the high-stability fan provided by the utility model has the advantages that the motor output shaft 4 is connected with the shell 1 through the bearing assembly 3, the bearing assembly 3 comprises at least two bearings and a bearing part for connecting the bearings, the bearing part applies pre-tightening force to the two adjacent bearings, the bearing part can be an independent shaft sleeve 8 or an annular boss 11 integrally formed with the shell, the bearing part is made of harder materials and is not easy to deform, the consistency of the pre-tightening force of the bearings is improved through the external pre-tightening mode, the pre-tightening force tolerance is reduced, and the service life is prolonged.

Finally, it should be emphasized that the present invention is not limited to the above-described embodiments, but only the preferred embodiments of the utility model have been described above, and the present invention is not limited to the above-described embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-stability fan is characterized by comprising a shell, a motor and a bearing assembly, wherein an output shaft of the motor is connected to the inner connecting wall of the shell through the bearing assembly, the bearing assembly comprises at least two bearings, the bearings comprise an inner wheel and an outer wheel, the inner wheel is connected with the output shaft of the motor, the outer wheel is connected with the inner connecting wall of the shell, and adjacent bearings are connected through a bearing part.

2. The high stability blower of claim 1, wherein the bearing assembly includes first and second bearings, the receptacle abutting outer wheels of the first and second bearings, respectively.

3. The high stability fan of claim 2, wherein the receiving portion is a bushing having an outer diameter identical to an outer diameter of the first bearing and the second bearing, and the first bearing, the second bearing and the bushing are respectively in close contact with the inner connecting wall of the housing.

4. The high-stability fan according to claim 2, wherein the receiving portion is integrally formed with the housing, the receiving portion is an annular boss on a connecting inner wall of the housing, and upper and lower end surfaces of the annular boss are respectively abutted against outer rings of the first bearing and the second bearing.

5. The high stability fan of any one of claims 3 or 4 wherein the bearing assembly further comprises a pre-tightening device fixed to the motor output shaft, the pre-tightening device abutting the inner wheel of the first bearing and/or the second bearing and applying a pre-tightening force in the direction of the motor output shaft.

6. The high-stability fan according to claim 1, wherein the bearing assembly includes a first bearing and a second bearing, the upper end and the lower end of the receiving portion are respectively provided with a limiting buckle, the first bearing and the second bearing are respectively clamped in the limiting buckles, and the receiving portion is in close contact with the inner connecting wall of the housing.

7. The high-stability fan according to claim 6, wherein the limit catch is provided with an inclined reverse-buckling portion, and the reverse-buckling portion abuts against the inner wheel of the first bearing and/or the second bearing and applies a pre-tightening force in the direction of the output shaft of the motor.