Fan and cleaning equipment

Abstract

The utility model discloses a draught fan and cleaning equipment, the draught fan comprises an impeller and a motor, the impeller comprises a first end cover, a second end cover, a third end cover and a fourth end cover, and the first end cover comprises a penetrating part penetrating through an output shaft of the motor so that the first end cover and the output shaft can coaxially rotate; the blade assembly is arranged on the side, away from the motor, of the first end cover, and the blade assembly is provided with a connecting part close to the output shaft; the blocking piece abuts against the connecting part so as to limit the blade assembly to be separated from the first end cover. Therefore, the blocking piece abuts against the connecting part of the blade assembly, the blade assembly can be limited in the axial direction, the fixing effect of the blade assembly and the reliability of the impeller can be improved, and the problem of axial separation of the blade assembly and the first end cover in the related technology is solved; in addition, the problem that large rotation noise is generated due to high-speed rotation of the impeller can be solved.

Description

Technical Field

[0001] The utility model relates to the field of fans, in particular to a fan and a cleaning device. Background Art

[0002] Usually, the fan includes volute, impeller and motor. During operation, the impeller is driven by the motor to rotate at high speed. The gas obtains kinetic energy and potential energy after the high-speed rotating impeller works. The kinetic energy is further converted into pressure potential energy in the volute flow channel. After the high-pressure gas is formed, it is diverted and output to the required equipment through the volute outlet. During this high-speed operation, the multi-layer impeller of the fan may separate, resulting in fan failure. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a fan, which solves the problem of separation of multiple impellers caused by high-speed operation of the fan and improves the performance of the fan. In addition, the application also proposes a cleaning device including the above-mentioned fan.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A fan comprises an impeller and a motor, wherein the impeller comprises:

[0006] A first end cover, comprising a penetration portion penetrated by the output shaft of the motor, so that the first end cover and the output shaft rotate coaxially;

[0007] A blade assembly is arranged on a side of the first end cover away from the motor, and the blade assembly has a connecting portion close to the output shaft;

[0008] A blocking member abuts against the connecting portion to limit the blade assembly from separating from the first end cover.

[0009] Optionally, in the above-mentioned fan, a first sleeve is arranged between the penetration portion and the output shaft, and a portion of the first sleeve protruding from the connecting portion forms a first extension portion, and the first extension portion protrudes radially along the output shaft, and the first extension portion constitutes the blocking member.

[0010] Optionally, in the above-mentioned fan, the blocking member is arranged on the penetration portion and protrudes from the connecting portion.

[0011] Optionally, in the above-mentioned fan, the motor has a second sleeve connected to the output shaft, and the fan also includes a first shell, the first shell is located between the motor and the first end cover, the first shell has a first end face set toward the second sleeve, the second sleeve has a second end face set toward the first shell and capable of abutting against the first end face, and in the axial direction of the output shaft, the projection of the first end face and the projection of the second end face have an overlapping area.

[0012] Optionally, in the above-mentioned fan, the end of the first sleeve protrudes axially relative to the penetration portion, so that there is an axial spacing between the first extension portion located at the end and the penetration portion, and a slot for accommodating the connecting portion is formed, and the connecting portion is locked in the slot to achieve axial positioning of the blade assembly.

[0013] Optionally, in the above-mentioned fan, the first end cover is provided with a plug-in hole, and the blade assembly is provided with a plug-in portion, and the plug-in portion extends into the plug-in hole to achieve connection between the blade assembly and the first end cover.

[0014] Optionally, in the above-mentioned fan, a protrusion is provided on the side of the first end surface facing the second end surface, and the protrusion abuts against the second end surface.

[0015] Optionally, in the above-mentioned fan, a plurality of the protrusions are provided, and the plurality of protrusions are evenly arranged in the overlapping area.

[0016] Optionally, in the above-mentioned fan, the protrusion is linear, and a plurality of the protrusions are radially arranged along the radial direction of the output shaft; or,

[0017] The protrusion is arc-shaped, and a plurality of the protrusions are arranged along the circumference of the output shaft; or, the protrusion is a bump and / or a convex point.

[0018] A cleaning device comprises the fan described in any one of the above items.

[0019] It can be seen from the above technical solution that the fan provided by the utility model can limit the blade assembly in the axial direction by abutting the blocking member on the connecting part of the blade assembly, thereby improving the fixing effect of the blade assembly and the reliability of the impeller, solving the problem of axial separation of the blade assembly and the first end cover in the related technology, and further solving the problem of relatively large rotational noise generated by the high-speed rotation of the impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A cross-sectional view of a fan provided by an embodiment of the utility model;

[0022] Figure 2 A partial enlarged view of the location of the first shaft sleeve provided in an embodiment of the utility model;

[0023] Figure 3 A schematic diagram of the structure of an impeller provided in an embodiment of the utility model;

[0024] Figure 4 A schematic diagram of the structure of the volute provided in an embodiment of the utility model;

[0025] Figure 5 A schematic diagram of the structure of a first end cover provided in an embodiment of the utility model;

[0026] Figure 6 A schematic diagram of the structure of a blade assembly provided in an embodiment of the utility model;

[0027] Figure 7 A front view of a volute provided in an embodiment of the utility model.

[0028] in:

[0029] 1- impeller, 11- first end cover, 111- penetration part, 112- plug hole, 12- blade assembly, 121- connection part, 122- plug part,

[0030] 2-motor, 21-output shaft, 22-second sleeve, 221-second end face,

[0031] 3-volute, 31-first shell, 32-second shell, 311-first end surface, 3111-protrusion,

[0032] 4-first sleeve, 41-blocking member, 42-end portion,

[0033] 5-Card slot. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] In the description of the utility model, it should be noted that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, and are only for the convenience of describing the utility model 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 cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0036] like Figures 1 to 7 As shown, an embodiment of the utility model provides a fan.

[0037] The fan includes an impeller 1 and a motor 2, wherein the impeller 1 includes a first end cover 11, a blade assembly 12 and a blocking member 41. The output shaft 21 of the motor 2 passes through the penetration portion 111 of the first end cover 11. It should be noted that the connection method between the first end cover 11 and the output shaft 21 can be, but is not limited to, an interference connection, and the output shaft 21 can drive the first end cover 11 to rotate coaxially; it should be noted that the connection portion 121 refers to a portion located on the blade and close to the output shaft 21. Generally, the connection portion 121 refers to the root of the blade; the blocking member 41 abuts against the connection portion 121 and is at least partially located above the connection portion 121, which can limit the axial displacement of the blade assembly 12, so as to play a role in axial positioning of the blade assembly 12, and prevent the first end cover 11 and the blade assembly 12 from being separated and delaminated.

[0038] The impeller 1 may also include a second end cover. From bottom to top along the axial direction of the output shaft 21, the first end cover 11, the blade assembly 12 and the second end cover are arranged in sequence. The blade assembly 12 includes a plurality of blades. The connecting parts 121 of the plurality of blades are evenly arranged around the circumference of the output shaft 21, and the plurality of blades are located between the first end cover 11 and the second end cover, so that the fan is more stable during operation. In the related art, when the fan is running at high speed, the first end cover 11 and the blade assembly 12 will be delaminated. For this reason, the present application provides a blocking member 41 for pressing against the connecting part 121 of the blade assembly 12, thereby preventing the blade assembly 12 from axial displacement when the fan is running at high speed, avoiding delamination of the first end cover 11 and the blade assembly 12, and thus avoiding fan failure.

[0039] By abutting the blocking member 41 against the connecting portion 121 of the blade assembly 12, the blade assembly 12 can be limited in the axial direction, thereby preventing the first end cover 11 of the impeller 1 and the blade assembly 12 from separating when the fan is at high temperature, large negative pressure, or rapid start and stop. In this way, the fixing effect of the blade assembly 12 and the performance of the fan are improved.

[0040] It should be noted that the blocking member 41 may be, but is not limited to, a component having a cylindrical structure, which at least includes a cylindrical body and a protruding structure protruding radially relative to the cylindrical body.

[0041] Further, such as Figure 1 and Figure 2 As shown, a first sleeve 4 may be provided between the penetration portion 111 and the output shaft 21, and the portion of the first sleeve 4 protruding from the connecting portion 121 forms a first extension portion, the first extension portion protrudes along the radial direction of the output shaft 21, and the first extension portion constitutes a blocking member 41. The first extension portion is the blocking member 41. The penetration portion 111 is located at the center of the first end cover 11 and is sleeved on the outside of the output shaft 21. More specifically, the first extension portion, i.e., the blocking member 41, may be formed by riveting the first sleeve 4. It should be noted that the material of the first sleeve 4 may be, but is not limited to, copper. It can be seen that the setting of the blocking member 41 does not add other structural parts, which can save costs.

[0042] In some optional embodiments, the blocking member 41 is disposed on the penetration portion 111 and protrudes from the connecting portion 121. It should be noted that the blocking member 41 is disposed along the end of the penetration portion 111, similar to the structure of riveting the end of the penetration portion 111, and can be pressed against the connecting portion 121, thereby avoiding the first end cover 11 and the blade assembly 12 of the impeller 1 from separating when the fan is at high temperature, large negative pressure, and rapid start and stop, thereby improving the fixing effect of the blade assembly 12 and the performance of the fan. It can be seen that the axial limitation of the blade assembly 12 is achieved by improving the structure of the original fan component, namely the penetration portion 111 itself, without adding other additional structural parts, which can save costs.

[0043] In other optional embodiments, the blocking member 41 may also be a separate component, for example, the blocking member 41 may be but is not limited to a sleeve or a nut, and the sleeve is tightly sleeved on the output shaft 21, or in other words, the sleeve is interference fit with the output shaft 21, so that it can be tightly connected to the output shaft 21, and the outer edge of the sleeve can abut the connecting portion 121, thereby achieving an axial limiting effect on the connecting portion 121, or a thread is opened on the output shaft 21, and the nut is tightened on the thread and pressed against the connecting portion 121, thereby avoiding separation of the blade assembly 12 and the first end cover 11, thereby improving the performance of the fan.

[0044] In some optional embodiments, such as Figure 1 and Figure 4 As shown, the motor 2 has a second sleeve 22 connected to the output shaft 21, and the fan further includes a first housing 31, the first housing 31 is located between the motor 2 and the first end cover 11, the first housing 31 has a first end face 311 arranged toward the second sleeve 22, the second sleeve 22 has a second end face 221 arranged toward the first housing 31 and capable of abutting against the first end face 311, and in the axial direction of the output shaft 21, the projection of the first end face 311 and the projection of the second end face 221 have an overlapping area. In the prior art, the first housing 31 is usually connected to the edge of the motor 2 by fasteners, but lacks axial locking with the first housing 31 in the middle area of ​​the motor 2, so that during the operation of the fan, there is usually vibration noise generated by the high-speed rotating motor 2.

[0045] It should be noted that, in the present application, the overlapping area is arranged in the middle area of ​​the fan, and the second sleeve 22 and the first shell 31 are arranged in sequence from bottom to top in the axial direction of the output shaft 21, and the first shell 31 has a first end face 311 facing the second sleeve 22, and the second sleeve 22 has a second end face 221 facing the first shell 31, that is, the first end face 311 of the first shell 31 and the second end face 221 of the second sleeve 22 are arranged opposite to each other, and the first end face 311 and the second end face 221 are located in the middle area of ​​the fan, and the first end face 311 of the first shell 31 can be pressed against the second end face 221 of the second sleeve 22, so that the first shell 31 can apply axial pressure to the second sleeve 22, that is, the axial fixation of the middle area of ​​the motor 2 and the first shell 31 is achieved. In combination with the prior art, the first shell 31 and the edge of the motor 2 can be fixed by means of screws. In the present application, the first shell 31 can also apply axial pressure to the middle of the motor 2, so that the middle and edge positions of the motor 2 are axially locked with the first shell 31, thereby reducing the vibration and noise between the motor 2 and the first shell 31 when the fan is running.

[0046] It should be noted that the second end face 221 may be annular in shape, and the overlapping area may be annular, or may be a segmented discontinuous shape, or may be a continuous irregular shape. Those skilled in the art may make specific designs according to actual needs.

[0047] It should also be noted that the fan further includes a second shell 32 , and the second shell 32 and the first shell 31 are covered to form a volute 3 of the fan.

[0048] In other optional embodiments, a buffer washer may be additionally provided between the first housing 31 and the second sleeve 22 to reduce noise between the motor 2 and the first housing 31 .

[0049] In some optional embodiments, such as Figure 2 As shown, the end 42 of the first sleeve 4 axially protrudes relative to the penetration portion 111, so that there is an axial spacing between the first extension portion located at the end 42 and the penetration portion 111, and a slot 5 for accommodating the connection portion 121 is formed, and the connection portion 121 is locked in the slot 5 to achieve axial limitation of the blade assembly 12. It should be noted that the end 42 of the first sleeve 4 axially protrudes relative to the penetration portion 111, which means that the first sleeve 4 and the penetration portion 111 are both sleeved on the output shaft 21, and in the axial direction of the output shaft 21, the end 42 of the first sleeve 4 is located above the penetration portion 111, and the end 42 and the penetration portion 111 are separated by a certain distance, and a slot 5 for accommodating the connection portion 121 of the blade assembly 12 is formed within this distance interval to axially limit the connection portion 121, that is, one end of the connection portion 121 abuts against the penetration portion 111, and the other end abuts against the first extension portion.

[0050] In other words, the diameter of the slot 5 is smaller than the outer diameter of the penetration portion 111 and the outer diameter of the first extension portion, that is, the slot 5 is a groove, the connecting portion 121 is arranged in the groove, and is abutted in the groove by the first extension portion and the penetration portion 111 located on both sides of the groove, thereby realizing axial limitation of the connecting portion.

[0051] It can be seen that the penetration portion 111 and the blocking member 41 axially limit the connection portion 121, and the arrangement of the slot 5 makes the axial positioning of the blade assembly 12 more secure, so that the impeller 1 can operate better and its rotation noise can be reduced. At the same time, it can solve the problem of obvious separation of multiple blades when the fan is at high temperature, large negative pressure, and rapid start and stop, thereby avoiding failure of the impeller 1 and fan failure.

[0052] In other optional embodiments, an insertion slot is provided on the slot 5 to allow the blade to extend therein, the blade extends thereinto and is locked therein, and the blocking member 41 presses against the blade to achieve axial limitation of the connecting portion 121 .

[0053] In an optional embodiment, the first end cover 11 is provided with a plug hole 112, and the blade assembly 12 is provided with a plug portion 122, and the plug portion 122 extends into the plug hole 112 to achieve the connection between the blade assembly 12 and the first end cover 11. In this way, the connection between the first end cover 11 and the blade assembly 12 is a detachable connection, which is conducive to the cleaning and maintenance of the blade assembly 12, and when a blade is damaged, it can also be replaced, thereby saving costs.

[0054] In other optional embodiments, the first end cover 11 and the blade assembly 12 are fixedly connected, for example, the first end cover 11 and the blade assembly 12 are integrally formed.

[0055] In an optional embodiment, a protrusion 3111 is provided on one side of the first end surface 311 facing the second end surface 221, and the protrusion 3111 abuts against the second end surface 221. The provision of the protrusion 3111 can prevent the first housing 31 and the second sleeve 22 from being in surface contact, which involves a larger contact area, and thus generates more friction and wear during the operation of the motor 2, resulting in wear of parts and shortened life.

[0056] In other optional embodiments, a protrusion 3111 may be provided on the side of the second end surface 221 facing the first end surface 311 , that is, the protrusion 3111 is located on the second end surface 221 .

[0057] Further, there are multiple protrusions 3111, and the multiple protrusions 3111 are evenly arranged in the overlapping area. The force between the first shell 31 and the second sleeve 22 is dispersed to the multiple protrusions 3111 in abutment contact, and the pressure on each protrusion 3111 is reduced, which can improve the stability of the abutment structure between the first shell 31 and the second sleeve 22. It helps to improve the durability of the structure. Even if some protrusions 3111 are in virtual contact with the second end face 221 due to defects in their own structure or other reasons, other protrusions 3111 can still abut against the second end face 221. In addition, multiple protrusions 3111 can share the load of friction and wear between the first shell 31 and the second sleeve 22, so that the friction force and wear degree of each contact position are more uniform. It should be noted that the specific number, specific form and specific position of the protrusions 3111 can be specifically designed by those skilled in the art according to actual needs. In this way, the contact between the first shell 31 and the second sleeve 22 is more uniform, and vibration and noise are better avoided.

[0058] In other optional embodiments, a plurality of protrusions 3111 are provided, and the plurality of protrusions 3111 may be randomly distributed in the overlapping area.

[0059] Furthermore, if Figure 4As shown, the protrusion 3111 is linear, and multiple protrusions 3111 are radially arranged along the radial direction of the output shaft 21. The first housing 31 and the second end face 221 are in line contact, and multiple straight lines are radially arranged around the output shaft 21. When the overlapping area is annular, since the lengths of the protrusions 3111 can be the same, the stress can be evenly distributed on the overlapping area, and the preparation of the protrusions 3111 in the first housing 31 can be more convenient. However, it is not limited to this. When the overlapping area is not annular, multiple linear protrusions 3111 are radially arranged along the radial direction, which can also play a role in evenly distributing stress.

[0060] Alternatively, the protrusion 3111 is arc-shaped, and multiple protrusions 3111 are arranged along the circumference of the output shaft 21. When the overlapping area is annular, the preparation of the protrusion 3111 in the first shell 31 can be more convenient. However, it is not limited to when the overlapping area is only annular. It can be any other form, and can also evenly distribute stress in the overlapping area.

[0061] Alternatively, the protrusion 3111 is a bump and / or a convex point, which is equivalent to point contact between the first housing 31 and the second end surface 221, which can better distribute stress, and at the same time, the shape of the overlapping area is not limited.

[0062] In other optional embodiments, along the axial direction, one end of the protrusion 3111 facing the second end face 221 is an arc-shaped end, and the arc-shaped end abuts against the second end face 221. This makes the contact surface between the protrusion 3111 and the second end face 221 smaller, and during the operation of the fan, the friction and wear between the second end face 221 and the first housing 31 can be more effectively reduced. In addition, the load can be concentrated on a relatively small area, which can more effectively bear large pressure or load and can effectively adapt to the high-speed operation of the fan.

[0063] In addition, the embodiment of the present application further provides a cleaning device, which includes the above-mentioned fan. For the beneficial effects of the cleaning device brought by the above-mentioned fan, please refer to the above-mentioned description of the fan, which will not be repeated here.

[0064] The above specific embodiments describe the basic principles of the present application. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. must be possessed by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation. The above details do not limit the present application to being implemented by adopting the above specific details.

[0065] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0066] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0067] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0068] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used to more clearly explain the technical solutions and cannot be used to limit the scope of protection of the present application.

[0069] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A fan, characterized in that: The invention comprises an impeller (1) and a motor (2), wherein the impeller (1) comprises: A first end cover (11) comprising a penetration portion (111) penetrated by the output shaft (21) of the motor, so that the first end cover (11) and the output shaft (21) rotate coaxially; A blade assembly (12) is arranged on a side of the first end cover (11) away from the motor (2), and the blade assembly (12) has a connecting portion (121) close to the output shaft (21); A blocking member (41) abuts against the connecting portion (121) to limit the blade assembly (12) from separating from the first end cover (11).

2. The fan according to claim 1, characterized in that: A first sleeve (4) is provided between the penetration portion (111) and the output shaft (21); a portion of the first sleeve (4) protruding from the connection portion (121) forms a first extension portion, the first extension portion protrudes in a radial direction of the output shaft (21), and the first extension portion constitutes the blocking member (41).

3. The fan according to claim 1, characterized in that: The blocking member (41) is arranged on the penetration portion (111) and protrudes from the connection portion (121).

4. The fan according to claim 2, characterized in that: The motor (2) has a second sleeve (22) connected to the output shaft (21); the fan also includes a first shell (31), the first shell (31) is located between the motor (2) and the first end cover (11), the first shell (31) has a first end face (311) arranged toward the second sleeve (22), the second sleeve (22) has a second end face (221) arranged toward the first shell (31) and capable of abutting against the first end face (311), and in the axial direction of the output shaft (21), the projection of the first end face (311) and the projection of the second end face (221) have an overlapping area.

5. The fan according to claim 2, characterized in that: The end portion (42) of the first sleeve (4) protrudes axially relative to the penetration portion (111), so that an axial spacing exists between the first extension portion located at the end portion (42) and the penetration portion (111), and a slot (5) is formed to accommodate the connecting portion (121), and the connecting portion (121) is locked in the slot (5) to achieve axial positioning of the blade assembly (12).

6. The fan according to claim 2 or 5, characterized in that: The first end cover (11) is provided with a plug hole (112), and the blade assembly (12) is provided with a plug portion (122), and the plug portion (122) extends into the plug hole (112) to achieve connection between the blade assembly (12) and the first end cover (11).

7. The fan according to claim 4, characterized in that: A protrusion (3111) is provided on the side of the first end surface (311) facing the second end surface (221), and the protrusion (3111) abuts against the second end surface (221).

8. The fan according to claim 7, characterized in that: The protrusions (3111) are provided in plurality, and the plurality of protrusions (3111) are evenly arranged in the overlapping area.

9. The fan according to claim 8, characterized in that: The protrusion (3111) is linear, and a plurality of the protrusions (3111) are radially arranged along the radial direction of the output shaft (21); or, The protrusion (3111) is arc-shaped, and a plurality of the protrusions (3111) are arranged along the circumference of the output shaft (21); or, The protrusion (3111) is a bump and / or a convex point.

10. A cleaning device, characterized in that: A fan comprising any one of claims 1 to 9.

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