CN212177495U

CN212177495U - Impeller and fan

Info

Publication number: CN212177495U
Application number: CN201922309247.2U
Authority: CN
Inventors: 顾兆武; 道下淳
Original assignee: Nidec Corp
Current assignee: Nidec Corp
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-12-18
Anticipated expiration: 2029-12-20

Abstract

The embodiment of the utility model provides an impeller and fan, the impeller has: a cup portion having a top portion and a sidewall portion extending axially from a peripheral edge of the top portion; the impeller further comprises an annular part, the annular part extends from one surface of the top part along the same direction as the extending direction of the side wall part, the annular part is closer to the radial inner side than the side wall part and is coaxial with the side wall part, a plurality of first ribs extending along the axial direction are formed on the surface of the radial inner side of the annular part, and the number of the first ribs is integral multiple of the number of the fan blades.

Description

Impeller and fan

Technical Field

The utility model relates to an electromechanical field.

Background

In manufacturing a fan, a rotor frame is usually pressed into a cup portion of an impeller, and the rotor frame is fixed by a rib in the cup portion.

It should be noted that the above background description is only for the sake of clarity and complete description of the technical solutions of the present invention, and is set forth for facilitating understanding of those skilled in the art. These solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the present invention.

SUMMERY OF THE UTILITY MODEL

The inventors have found that the impeller itself may be deformed by the general resin molding of the impeller, and the cup portion may be easily deformed when the rotor frame is press-fitted into the cup portion of the impeller, and these factors may cause a poor dynamic balance performance of the impeller, and it is necessary to correct the dynamic balance of the impeller by a later process, but there is a problem that the number of correction steps is too large, and the production cost is too high.

To address at least one of the above problems or other similar problems, embodiments of the present invention provide an impeller and a fan.

According to an aspect of the embodiments of the present invention, there is provided an impeller, the impeller having: a cup portion having a top portion and a sidewall portion extending axially from a peripheral edge of the top portion; the impeller further comprises an annular part, the annular part extends from one surface of the top part along the same direction as the extending direction of the side wall part, the annular part is closer to the radial inner side than the side wall part and is coaxial with the side wall part, a plurality of first ribs extending along the axial direction are formed on the surface of the radial inner side of the annular part, and the number of the first ribs is integral multiple of the number of the fan blades.

In at least one embodiment, the plurality of first ribs are equally circumferentially spaced.

In at least one embodiment, each fan blade corresponds in circumferential direction to the position of at least one first rib.

In at least one embodiment, the impeller further has: and a plurality of positioning portions that protrude from the top portion in the axial direction and abut against the plurality of first ribs, respectively, wherein the height of the first ribs is 2/3 times the distance from the positioning portions to the edge of the annular portion in the axial direction.

In at least one embodiment, a plurality of second ribs extending radially outward from the center of the top portion are formed on one surface of the top portion, and the number of the second ribs is the same as the number of the fan blades.

In at least one embodiment, the impeller further has: and a plurality of gates for injection molding, which are provided on the other surface of the top portion, and the positions of the plurality of gates and the positions of the plurality of second ribs correspond to each other in the circumferential direction.

In at least one embodiment, the impeller further has: and a plurality of positioning portions that protrude from the apex portion in the axial direction and abut against the plurality of first ribs, respectively, wherein the plurality of second ribs are provided at equal intervals in the circumferential direction, and one end of each of the plurality of second ribs on the outer side in the radial direction abuts against one of the positioning portions.

In at least one embodiment, a first dynamic balance correction portion is formed at one end of the annular portion away from the top portion, and a second dynamic balance correction portion is formed at one end of the side wall portion away from the top portion.

In at least one embodiment, the cup portion is integrally formed with the annular portion.

According to another aspect of the present invention, there is provided a fan having: the impeller of any preceding embodiment; a motor that drives the impeller to rotate; and a housing provided radially outside the motor and the impeller.

In at least one embodiment, the fan further includes a magnet held radially inside the rotor frame, and a rotor frame pressed into the annular portion in the axial direction, a surface of the rotor frame radially outside abutting against the plurality of first ribs.

The embodiment of the utility model provides an one of the beneficial effect lies in: the number of the first rib parts for fixing the rotor frame in the circumferential direction is set to be integral multiple of the number of the fan blades, so that the dynamic balance of the impeller can be improved, the labor hour consumed for correcting the dynamic balance of the impeller in later engineering is saved, and the production cost is reduced.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and the accompanying drawings, which specify the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the present invention are not so limited in scope. The embodiments of the invention include many variations, modifications and equivalents within the scope of the terms of the appended claims.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

Elements and features described in one drawing or one implementation of an embodiment of the invention may be combined with elements and features shown in one or more other drawings or implementations. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views, and may be used to designate corresponding parts for use in more than one embodiment.

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

fig. 1 is a schematic view of an impeller according to an embodiment of the present invention.

Fig. 2 is a schematic view of the impeller as viewed from a direction opposite to that of fig. 1.

Fig. 3 is an exploded view of the fan according to the embodiment of the present invention.

Detailed Description

The foregoing and other features of the invention will become apparent from the following description taken in conjunction with the accompanying drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the embodiments in which the principles of the invention may be employed, it being understood that the invention is not limited to the embodiments described, but, on the contrary, is intended to cover all modifications, variations and equivalents falling within the scope of the appended claims. Various embodiments of the present invention will be described below with reference to the accompanying drawings. These embodiments are merely exemplary and are not intended to limit the present invention.

In the embodiments of the present invention, the terms "first", "second", "upper", "lower", and the like are used for distinguishing between different elements by reference, but do not denote any order, such as spatial arrangement, temporal order, or the like, of the elements, and the elements should not be limited by these terms. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising," "including," "having," and the like, refer to the presence of stated features, elements, components, and do not preclude the presence or addition of one or more other features, elements, components, and elements.

In the embodiments of the present invention, the singular forms "a", "an", and the like include the plural forms and should be interpreted broadly as "a" or "an" and not limited to the meaning of "a" or "an"; furthermore, the term "comprising" should be understood to include both the singular and the plural, unless the context clearly dictates otherwise. Further, the term "according to" should be understood as "at least partially according to … …," and the term "based on" should be understood as "based at least partially on … …," unless the context clearly dictates otherwise.

In the following description of the embodiments of the present invention, for the sake of convenience of description, a radial direction centering on the center axis of the rotation shaft of the motor or the center axis of the impeller top portion is referred to as a "radial direction", a direction surrounding the center axis is referred to as a "circumferential direction", a direction along the center axis or a direction parallel thereto is referred to as an "axial direction", a side away from the center axis in the radial direction is referred to as a "radially outer side", and a side close to the center axis in the radial direction is referred to as a "radially inner side".

Embodiments of the first aspect

Embodiments of the first aspect of the present invention provide an impeller, fig. 1 is a schematic diagram of an impeller of embodiments of the present invention, and fig. 2 is a schematic diagram of an impeller observed in a direction opposite to that of fig. 1.

In an embodiment of the present invention, as shown in fig. 1, the impeller 10 may include a cup portion 110, a plurality of blades 120, and a ring portion 130, as shown in fig. 2, the cup portion 110 includes a top portion 111 and a side wall portion 112, the side wall portion 112 extends from a circumferential edge of the top portion 111 along an axial direction S, and the plurality of blades 120 are disposed in a circumferential direction of the side wall portion 112.

The number of the fan blades 120 can be set according to actual needs. For example, the number of the fan blades 120 shown in fig. 1 and 2 is 3, but the embodiment of the present invention does not limit the number of the fan blades 120.

As shown in fig. 1, the annular portion 130 extends from the one surface 111a of the top portion 111 in the same direction as the side wall portion 112, that is, the annular portion 130 and the side wall portion 112 are located on the same axial side with respect to the top portion 111, the annular portion 130 is located radially inward of the side wall portion 112, and the annular portion 130 is coaxial with the side wall portion 112. A plurality of first ribs 131 extending in the axial direction S are formed on the radially inner surface of the annular portion 130, and the number of the first ribs 131 is an integral multiple of the number of the blades 120.

For example, the number of the fan blades 120 shown in fig. 1 is 3, and the number of the first ribs 131 may be 3 times the number of the fan blades 120, that is, the number of the first ribs 131 may be 9. However, the embodiment of the present invention is not limited thereto, and the number of the first rib portions 131 may be other integer multiples of the number of the fan blades 120.

Accordingly, the number of the first ribs 131 for fixing the rotor frame in the circumferential direction is set to be an integral multiple of the number of the fan blades 120, so that the dynamic balance of the impeller can be improved, the man-hour required for correcting the dynamic balance of the impeller in the later stage of the process can be saved, and the production cost can be reduced.

In at least one embodiment, the plurality of first ribs 131 are distributed at equal intervals in the circumferential direction, so that the probability of the shaft misalignment between the rotor and the impeller can be reduced, the concentricity between the rotor and the impeller can be improved, the balance of the impeller can be improved, and the dynamic balance of the impeller can be further improved.

In at least one embodiment, each fan blade 120 corresponds in position to at least one first rib 131 in the circumferential direction. As shown in fig. 1, in the case that the number of the first ribs 131 is 3 times of the number of the fan blades 120, each fan blade 120 corresponds to 3

first ribs

131, and 1 first rib 131 located at the middle position among the 3 first ribs 131 approximately corresponds to the middle position of the fan blade 120 in the circumferential direction; however, the embodiment of the present invention is not limited thereto, for example, in a case that the number of the first rib portions 131 is 2 times of the number of the fan blades 120, each fan blade 130 corresponds to 2 first rib portions 131, and the 2 first rib portions 131 may be symmetrically distributed with respect to the middle position of the fan blade 120 in the circumferential direction. As long as each fan blade 120 at least corresponds to 1 first rib portion 131, the embodiment of the present invention does not limit the specific distribution position of the plurality of first rib portions 131.

In at least one embodiment, as shown in fig. 1, the impeller 10 may further include a positioning portion 140, the positioning portion 140 protruding from the top portion 111 in the axial direction S and abutting against the first rib 131. The number of the positioning parts 140 may be the same as the number of the first rib parts 131, but the embodiment of the present invention does not limit the number of the positioning parts 140. Thereby, the position of the rotor frame, which will be described later, in the axial direction S is positioned by the positioning portion 140.

As shown in the partially enlarged view of fig. 1, the height of the first rib is H, the distance from the positioning portion 140 to the edge of the annular portion 130 is D, and the height H is smaller than the distance D, and for example, the height H may be equal to 2/3 times the distance D. This can further improve the dynamic balance of the impeller. The embodiment of the utility model provides a do not do the restriction to height H and the relative size relation of distance D, for example, height H also can be 4/5 times, 1/2 times etc. of distance D, as long as height H is little than distance D.

In at least one embodiment, as shown in fig. 1, a second rib 113 is further formed on the surface 111a of the top portion 111, the second rib 113 extends from the center of the top portion 111 to the outside in the radial direction, the number of the second ribs 113 may be multiple, for example, the number of the second ribs 113 is the same as the number of the fan blades 120, but the embodiment of the present invention is not limited thereto, and other numbers of the second ribs 113 may be included. As shown in fig. 1, the plurality of second ribs 113 are provided at equal intervals in the circumferential direction, and one end of each second rib 113 on the outer side in the radial direction abuts on one positioning portion 140. Thereby, the strength of the cup 110 is enhanced by the second ribs 113.

In at least one embodiment, as shown in fig. 2, the impeller 10 further has a gate 10a for injection molding, and the gate 10a may be plural, and the plural gates 10a are provided on the other face 111b of the top portion 111. Positions of the plurality of gates 10a in the circumferential direction correspond to positions of the plurality of second ribs 113 in the circumferential direction, respectively. For example, the number of gates 10a shown in fig. 2 is 3, and the position of each gate 10a corresponds to the position of each second rib 113 (shown in fig. 1) formed on the surface 111a of the top portion 111 in the circumferential direction, in accordance with the number of the fan blades 120, respectively, whereby the dynamic balance of the impeller can be further improved.

In at least one embodiment, as shown in fig. 1, the first dynamic balance correction portion 130a is formed at one end of the annular portion 130 away from the top portion 111, and the second dynamic balance correction portion 112a is formed at one end of the side wall portion 112 away from the top portion 111, so that the dynamic balance of the impeller can be further improved.

For example, the radial dimension of the first dynamic balance correction portion 130a is larger than the radial dimension of the other portion of the annular portion 130, and the radial dimension of the second dynamic balance correction portion 112a is larger than the radial dimension of the other portion of the side wall portion 112. The dynamic balance of the impeller 10 is corrected by attaching a material for correcting the dynamic balance to the inner walls of the first dynamic balance correction portion 130a and the second dynamic balance correction portion 112a, for example, a mud material is attached to the inner wall of the first dynamic balance correction portion 130a, and a metal material is attached to the inner wall of the second dynamic balance correction portion 112 a.

In at least one embodiment, the cup portion 110 and the annular portion 130 are integrally formed, for example, by injection molding the cup portion 110 and the annular portion 130 from a resin material. The embodiment of the present invention does not limit the material or the forming process of the cup portion 110 and the annular portion 130.

According to the utility model discloses the embodiment of first aspect will be used for carrying out the quantity of fixed first rib portion in the week to the rotor frame and establish to the integer multiple of flabellum quantity, can improve the dynamic balance of impeller to practice thrift the dynamic balance of impeller in the later stage engineering and revise the man-hour that consumes, and then reduction in production cost.

Embodiments of the second aspect

An embodiment of the second aspect of the present invention provides a fan, and fig. 3 is an exploded schematic view of the fan according to the embodiment of the present invention.

In an embodiment of the present invention, as shown in fig. 3, the fan 1 comprises an impeller 10 as described in the embodiment of the first aspect. Since the structure of the impeller 10 has been described in detail in the embodiment of the first aspect, the contents thereof are incorporated herein, and the description thereof is omitted here.

As shown in fig. 3, the fan 1 may further include a motor 20 and a housing 30, the motor 20 driving the impeller 10 to rotate, the housing 30 being disposed radially outside the motor 20 and the impeller 10 for accommodating the motor 20 and the impeller 10.

In at least one embodiment, as shown in fig. 3, the fan 1 further has a magnet 40 and a rotor frame 50, the magnet 40 being held radially inside the rotor frame 50, the rotor frame 50 being pressed into an annular portion 130 (not identified in fig. 3) of the impeller 10 in the axial direction S, and a radially outer surface of the rotor frame 50 abutting against a plurality of first ribs 131 (not identified in fig. 1 and 3) of the impeller 10. Thereby, the rotor frame 50 is fixed and positioned in the radial direction by the first rib 131.

In the embodiment of the second aspect of the present invention, the application field of the fan 1 is not limited, and the fan can be applied to a wireless charger of a mobile terminal, and can also be applied to products such as an air conditioner, a water dispenser, a washing machine, a sweeper, a compressor, a blower, a blender, and electrical equipment in other fields.

According to the utility model discloses the embodiment of second aspect will be used for carrying out the quantity of the first rib portion that fixes to the rotor frame in the week and establish to the integer multiple of flabellum quantity, can improve the dynamic balance of impeller to practice thrift the dynamic balance of impeller in the later stage engineering and revise the man-hour that consumes, and then reduction in production cost.

The present invention has been described in connection with specific embodiments, but it should be clear to a person skilled in the art that these descriptions are intended to be illustrative and not limiting to the scope of the invention. Various modifications and adaptations of the present invention may occur to those skilled in the art, which are within the spirit and scope of the present invention.

Claims

1. An impeller, the impeller having:

a cup portion having a top portion and a sidewall portion extending axially from a peripheral edge of the top portion;

a plurality of blades disposed in a circumferential direction of the sidewall portion,

the method is characterized in that:

the impeller further includes an annular portion extending from one surface of the top portion in the same direction as the side wall portion, the annular portion being located radially inward of the side wall portion and coaxial with the side wall portion,

a plurality of first ribs extending in the axial direction are formed on the surface of the radial inner side of the annular part,

the number of the first ribs is an integral multiple of the number of the fan blades.

2. The impeller according to claim 1,

the plurality of first ribs are distributed at equal intervals in the circumferential direction.

3. The impeller according to claim 1,

in the circumferential direction, each fan blade corresponds to the position of at least one first rib.

4. The impeller according to claim 1,

the impeller further has:

a plurality of positioning portions that protrude from the top portion in the axial direction and abut against the plurality of first ribs, respectively,

in the axial direction, the height of the first rib is 2/3 times the distance from the positioning portion to the edge of the annular portion.

5. The impeller according to claim 1,

a plurality of second ribs extending radially outward from the center of the top portion are formed on one surface of the top portion,

the number of the second ribs is the same as the number of the fan blades.

6. The impeller according to claim 5,

the impeller further has:

a plurality of gates for injection molding, provided on the other surface of the top portion,

positions of the plurality of gates correspond to positions of the plurality of second ribs, respectively, in the circumferential direction.

7. The impeller according to claim 6,

the impeller further has:

the plurality of second rib portions are provided at equal intervals in the circumferential direction, and one end of the radially outer side of each of the plurality of second rib portions abuts against one of the positioning portions.

8. The impeller according to claim 1,

a first dynamic balance correcting part is formed at one end of the annular part far away from the top part,

and a second dynamic balance correcting part is formed at one end of the side wall part far away from the top part.

9. The impeller according to claim 1,

the cup portion is integrally formed with the annular portion.

10. A fan, characterized in that the fan has:

the impeller of any one of claims 1 to 9;

a motor that drives the impeller to rotate; and

a housing disposed radially outward of the motor and the impeller.

11. The fan as claimed in claim 10,

the fan further includes a magnet held radially inside the rotor frame, and a rotor frame axially press-fitted into the annular portion, and a radially outer surface of the rotor frame abuts against the plurality of first ribs.