CN216390676U - Motor, rotor support and electric product - Google Patents

Abstract

The embodiment of the application provides a motor, a rotor bracket and an electric product. The motor includes: a stationary part having a stator; and a rotating portion in which a magnet is disposed radially outside the stator. The rotating portion includes a cover portion that is axially opposed to the stator and covers one end in the axial direction; the cover part is provided with a plurality of ribs, and an exhaust port is formed between two adjacent ribs; the first surface in the axial direction of at least one of the plurality of ribs has a first inclined surface that is inclined in the circumferential direction. Therefore, the rib part with the inclined surface is arranged on the cover part, and the inclined heat radiation holes can be formed on the rotor bracket to increase the air flow of the motor, so that the cooling fan can be omitted, the number of parts can be reduced, the cost can be reduced, and the motor is beneficial to miniaturization; in addition, the inclined heat dissipation holes enable air of the motor to flow smoothly, and the motor is high in air fluidity and heat dissipation efficiency.

Description

Motor, rotor support and electric product

Technical Field

The application relates to the electromechanical field, in particular to a motor, a rotor support and an electrical product.

Background

An outer rotor type motor is often used in an electric power tool, and a rotating portion of the outer rotor type motor has a cover portion that covers one end in an axial direction and that faces a stator in the axial direction. When the motor rotates, the coil generates heat, so that the heat is retained in the motor, and the electric performance of the motor is influenced; especially for high-speed motors, the phenomenon of coil heating is particularly obvious due to large current. Generally, a heat dissipation fan is additionally arranged to cool the motor, so as to ensure the performance of the motor.

It should be noted that the above description of the technical background is only for the sake of clarity and complete description of the technical solutions of the present application and for the understanding of the skilled person, and the technical solutions are not considered to be known to the skilled person merely because they are described in the background section of the present application.

SUMMERY OF THE UTILITY MODEL

However, the inventors found that: in the outer rotor type motor additionally provided with the cooling fan, the increase of the number of parts causes the increase of the cost, and is not favorable for the miniaturization of the motor; in addition, the air is exhausted through the heat dissipation holes in the vertical direction, a large amount of eddy current still exists in the motor, the air fluidity is low, and the heat dissipation efficiency is low.

To solve at least one of the above problems or other similar problems, embodiments of the present application provide a motor, a rotor bracket, and an electric product,

according to an aspect of an embodiment of the present application, there is provided a motor including: a stationary part having a stator; and a rotating part, wherein a magnet is arranged at the radial outer side of the stator;

wherein the rotating portion has a cover portion that is axially opposed to the stator and covers one axial end; the cover part is provided with a plurality of ribs, and an exhaust port is formed between two adjacent ribs; the first surface of at least one of the plurality of ribs in the axial direction has a first inclined surface that is inclined in the circumferential direction.

In some embodiments, the first inclined surface is inclined from the first surface to the first exhaust port in the circumferential direction, and a direction in which the first inclined surface is inclined from the first surface to the first exhaust port in the circumferential direction coincides with a direction in which the rotating portion rotates.

In some embodiments, the first inclined surface intersects the first surface of the rib to form a first straight line portion.

In some embodiments, the first straight portion is parallel to a first side surface on the first exhaust port side in the circumferential direction on the rib.

In some embodiments, the rib further has a second inclined surface inclined in the circumferential direction on a second surface in the axial direction.

In some embodiments, the second inclined surface is inclined from the second surface to a second exhaust port in a circumferential direction, and a direction in which the second inclined surface is inclined from the second surface to the second exhaust port in the circumferential direction is opposite to a direction in which the rotating portion rotates.

In some embodiments, the second inclined surface intersects the second surface of the rib portion to form a second straight portion.

In some embodiments, the second straight portion is parallel to a second side surface on the second exhaust port side in the circumferential direction on the rib portion.

In some embodiments, the plurality of ribs is at least three in number, and the plurality of ribs are arranged at equal intervals in the circumferential direction.

In some embodiments, the plurality of ribs are radially arranged, and a first length of the ribs in the circumferential direction on the radially inner side is smaller than a second length of the ribs in the circumferential direction on the radially outer side.

According to another aspect of the embodiments of the present application, there is provided a rotor holder having a cover portion covering one end in an axial direction; the cover part is provided with a plurality of ribs, and an exhaust port is formed between two adjacent ribs; the first surface of at least one of the plurality of ribs in the axial direction has a first inclined surface that is inclined in the circumferential direction.

According to a further aspect of embodiments of the present application, there is provided an electric product having the aforementioned motor.

One of the beneficial effects of the embodiment of the application lies in: the cover is provided with the rib part with the inclined surface, and the inclined heat dissipation holes can be formed on the rotor bracket to increase the air flow of the motor, so that a cooling fan can be omitted, the number of parts is reduced, the cost is reduced, and the motor is beneficial to miniaturization; in addition, the inclined heat dissipation holes enable air of the motor to flow smoothly, and the motor is high in air fluidity and heat dissipation efficiency.

Embodiments of the present application are disclosed in detail with reference to the following description and the accompanying drawings. It should be understood that the embodiments of the present application are not so limited in scope. The embodiments of the application include many variations, modifications and equivalents within the spirit and scope 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/comprises/having" when used herein, is taken to specify the presence of stated features, integers or components, but does not preclude the presence or addition of one or more other features, integers or components.

Drawings

The above and other objects, features and advantages of the embodiments of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic view of a motor according to an embodiment of the present application;

FIG. 2 is another schematic view of a motor according to an embodiment of the present application;

FIG. 3 is another schematic view of a motor according to an embodiment of the present application;

FIG. 4 is another schematic view of a motor according to an embodiment of the present application;

FIG. 5 is a schematic view of a rotating portion of an embodiment of the present application;

FIG. 6 is another schematic view of a rotating portion of an embodiment of the present application;

FIG. 7 is another schematic view of a rotating portion of an embodiment of the present application;

fig. 8 is another schematic view of a rotating portion of an embodiment of the present application.

Detailed Description

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

In embodiments of the present application, 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 application, the singular forms "a", "an", and the like may 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 present application, for the sake of convenience of description, a direction extending along or parallel to the motor shaft O O' is referred to as an "axial direction", a radial direction centering on the axial direction is referred to as a "radial direction", and a direction surrounding the axial direction is referred to as a "circumferential direction". One side in the axial direction O is referred to as an upper side or an upper side, and one side in the axial direction O' is referred to as a lower side or a lower side. It should be noted that these are for convenience of illustration only and do not limit the orientation of the motor during manufacture and use.

Embodiments of the present application will be described below with reference to the drawings.

Embodiments of the first aspect

Embodiments of a first aspect of the present application provide a motor. Fig. 1 is a schematic view of a motor according to an embodiment of the present application, schematically illustrating the motor 100 after assembly from a perspective; fig. 2 is another schematic view of the motor of the embodiment of the present application, schematically illustrating the motor 100 assembled from another perspective; fig. 3 is another schematic view of the motor of the embodiment of the present application, schematically showing the motor 100 before assembly from one perspective; fig. 4 is another schematic view of the motor of the embodiment of the present application, schematically showing the motor 100 before assembly from another angle.

As shown in fig. 1 to 4, the motor 100 includes: a stationary portion 101 having a stator 1011; and a rotating portion 102 in which a magnet 1021 is disposed radially outside the stator 1011. Further, the motor 100 further includes a rotating shaft 1022 and the like. Reference may be made to the related art with respect to other components and structures of the motor 100.

As shown in fig. 1 to 4, the rotating portion 102 includes a cover 201, the cover 201 axially faces the stator 1011 and covers one end in the axial direction; the lid 201 has a plurality of ribs 2011, and a vent 2012 is formed between two adjacent ribs 2011; a first surface (upper surface) of at least one of the plurality of ribs 2011 in the axial direction has a first inclined surface 2013 inclined in the circumferential direction.

In the following description, one rib 2011 is taken as an example, and the number of ribs 2011 is not limited in the present application. In the present embodiment, all the ribs 2011 may be provided with inclined surfaces, or only some of the ribs 2011 may be provided with inclined surfaces. In the following description, the inclined surfaces are provided on all the ribs 2011, but the present invention is not limited thereto. In addition, for simplicity, only some parts of the embodiments of the present application are labeled, but the labels are not to be construed as limiting the present application.

Therefore, the rib part with the inclined surface is arranged on the cover part, and the inclined heat radiation holes can be formed on the rotor bracket to increase the air flow of the motor, so that the cooling fan can be omitted, the number of parts can be reduced, the cost can be reduced, and the motor is beneficial to miniaturization; in addition, the inclined heat dissipation holes enable air of the motor to flow smoothly, and the motor is high in air fluidity and heat dissipation efficiency.

It is to be noted that fig. 1 to 4 only schematically illustrate the motor of the present application, but the present application is not limited thereto; for example, other components or devices may be provided, and the description thereof is omitted. Reference may be made to the related art for elements or elements (e.g., housing, bearings, seals, coils, etc.) not specifically identified in fig. 1-4, but not limited thereto.

In some embodiments, the first inclined surface 2013 is inclined from the first surface to the first exhaust port in the circumferential direction, and a direction in which the first inclined surface is inclined from the first surface to the first exhaust port in the circumferential direction coincides with a direction in which the rotating portion rotates.

Fig. 5 is a schematic view of the rotating portion according to the embodiment of the present application, showing a rotor holder (cover) viewed from the upper side with the rotating shaft removed. As shown in fig. 5, the first inclined surface 2013 is inclined in the circumferential direction from the first surface 301 (axially upper surface) toward the first exhaust port 302, and the direction in which the first inclined surface 2013 is inclined in the circumferential direction (the direction from the first surface 301 toward the first exhaust port 302) coincides with the direction in which the rotating portion 102 rotates (the clockwise direction shown in a in fig. 5).

Therefore, the air-cutting area of the inclined heat dissipation holes is reduced, and the air resistance is reduced, so that the pressure difference between the inside and the outside of the motor is further increased, and the air fluidity is increased.

In some embodiments, the first inclined surface 2013 intersects the first surface 301 of the rib 2011 to form a first straight line portion.

As shown in fig. 5, the first inclined surface 2013 intersects the first surface 301 (axially upper surface) of the rib 2011 to form a first linear portion 303. Further, as shown in fig. 5, the first inclined surface 2013 also intersects the first side surface 304 (the side surface on the first exhaust port 302 side in the circumferential direction) of the rib 2011.

In some embodiments, the first linear portion 303 is parallel to a first side surface of the rib 2011 on the side of the first exhaust port 302 in the circumferential direction.

Fig. 6 is another schematic view of the rotating portion according to the embodiment of the present application, showing the rotor holder (cover) viewed from above with the rotating shaft removed. As shown in fig. 6, the first inclined surface 2013 intersects the first surface 301 (axially upper surface) of the rib 2011 to form a first linear portion 303. Further, as shown in fig. 6, the first inclined surface 2013 also intersects the first side surface 304 (the side surface on the first exhaust port 302 side in the circumferential direction) of the rib 2011. The first linear portion 303 is parallel to the first side face 304 (formed in a straight line due to the angle of view in fig. 6).

Therefore, the first inclined surface can be formed on the rib part through the processes of cutting and the like, and the processing of the component is convenient; and the resistance of the air discharged from the air outlet can be reduced, and the air fluidity can be further increased.

In some embodiments, the rib 2011 also has a second inclined surface that is inclined in the circumferential direction on a second surface in the axial direction.

As shown in fig. 5, the rib 2011 also has a second inclined surface 305 inclined in the circumferential direction on a second surface in the axial direction (axially lower surface).

This can further increase the difference in pressure between the inside and the outside of the motor, thereby increasing the air fluidity.

In some embodiments, the second inclined surface 305 is inclined from the second surface to the second exhaust port in the circumferential direction, and the direction in which the second inclined surface 305 is inclined from the second surface to the second exhaust port in the circumferential direction is opposite to the direction in which the rotating portion rotates.

Fig. 7 is another schematic view of the rotating portion according to the embodiment of the present application, showing a rotor holder (cover) viewed from the lower side with the rotating shaft removed. As shown in fig. 7, the second inclined surface 305 is inclined from the second surface 501 (axially lower surface) toward the second exhaust port 502 in the circumferential direction, and the direction in which the second inclined surface 305 is inclined in the circumferential direction (the direction from the second surface 501 toward the second exhaust port 502) is opposite to the direction in which the rotating portion 102 rotates (counterclockwise direction shown by B in fig. 5).

This increases the flow space inside the motor, and when the air resistance is reduced, the air fluidity can be increased by further increasing the difference in pressure between the inside and the outside of the motor.

In some embodiments, the second inclined surface 305 intersects the second surface 501 of the rib 2011 to form a second straight portion.

As shown in fig. 7, the second inclined surface 305 intersects with a second surface 501 (axially lower surface) of the rib 2011 to form a second linear portion 503. Further, as shown in fig. 7, the second inclined surface 305 also intersects the second side surface 504 (the side surface on the second exhaust port 502 side in the circumferential direction) of the rib 2011.

In some embodiments, the second linear portion 503 is parallel to a second side surface 504 on the side of the second exhaust port 502 in the circumferential direction on the rib 2011.

Fig. 8 is another schematic view of the rotating portion according to the embodiment of the present application, showing a rotor holder (cover) as viewed from below with the rotating shaft removed. As shown in fig. 8, the second inclined surface 305 intersects with a second surface 501 (axially lower surface) of the rib 2011 to form a second linear portion 503. Further, as shown in fig. 8, the second inclined surface 305 also intersects the second side surface 504 (the side surface on the second exhaust port 502 side in the circumferential direction) of the rib 2011. The second straight portion 503 is parallel to the second side surface 504 (formed in a straight line due to the angle of view in fig. 8).

Therefore, the second inclined surface can be formed on the rib part through the processes of cutting and the like, and the processing of the component is convenient; and the circulation space in the motor can be enlarged, and the air fluidity can be further increased.

In some embodiments, the plurality of ribs 2011 is at least three in number, and the plurality of ribs 2011 are arranged at equal intervals in the circumferential direction. Therefore, under the condition of ensuring the stability and the reliability of the rotor bracket, the whole area of the heat dissipation holes can be increased, and the air of the motor can flow smoothly.

For example, fig. 1 to 8 each illustrate 4 ribs, and one exhaust port is formed between every two ribs, so that the rotor holder has four exhaust ports. However, the present invention is not limited to this, and for example, other numbers of ribs may be provided as needed, and the ribs may be arranged at unequal intervals.

For another example, each rib portion in fig. 1 to 8 is provided with a first inclined surface (on an axially upper surface) and a second inclined surface (on an axially lower surface), but the present application is not limited thereto. For example, a portion of the rib may be provided with the first inclined surface and another portion of the rib may be provided with the second inclined surface, or a portion of the rib may be provided with the first inclined surface and the second inclined surface and another portion of the rib may be provided with only the first inclined surface or only the second inclined surface, and the like, and the present application is not limited thereto.

For another example, the first inclined surface and the second inclined surface in fig. 1 to 8 are described using a flat surface as an example, but the present application is not limited thereto. For example, the first inclined surface and/or the second inclined surface may also be an inclined surface with a certain curvature, or an inclined surface with an irregular shape, or an inclined surface with some grooves (for example, further grooves) or protrusions (for example, further ribs), and so on.

In some embodiments, the plurality of ribs 2011 are radially arranged, and a first length of the ribs 2011 in the circumferential direction on the radially inner side is smaller than a second length of the ribs 2011 in the circumferential direction on the radially outer side.

For example, as shown in fig. 6, a first length (length L1 between d1 and d 2) of the rib 2011 in the circumferential direction on the radially inner side is smaller than a second length (length L2 between d3 and d 4) in the circumferential direction on the radially outer side. This can further increase the air fluidity while ensuring the stability and reliability of the components.

In the embodiment of the present application, the air flow of the motor is smooth through the inclined heat dissipation holes. It can be known through simulation experiments that, compared with the vertical type heat dissipation hole structure, the inclined type heat dissipation hole structure of the embodiment of the present application can increase the flow rate by about 34%, so that the air flow of the motor is smooth, the air flow is large and the heat dissipation efficiency is high.

The above embodiments are merely illustrative of the embodiments of the present application, but the present application is not limited thereto, and appropriate modifications may be made on the basis of the above embodiments. For example, the above-described embodiments may be used alone, or one or more of the above-described embodiments may be combined.

In addition, the above is only an exemplary explanation of each device or component, but the present application is not limited thereto, and the specific contents of each device or component may also refer to the related art; it is also possible to add devices or components not shown in fig. 1 to 8 or to reduce one or more devices or components in fig. 1 to 8.

According to the embodiment of the application, the rib part with the inclined surface is arranged on the cover part, and the inclined heat dissipation holes can be formed on the rotor bracket to increase the air flow of the motor, so that a cooling fan can be omitted, the number of parts is reduced, the cost is reduced, and the motor is favorably miniaturized; in addition, the inclined heat dissipation holes enable air of the motor to flow smoothly, and the motor is high in air fluidity and heat dissipation efficiency.

Embodiments of the second aspect

Embodiments of the second aspect of the present application provide a rotor support as described for the rotating part 102 in embodiments of the first aspect. Since the structure of the rotating portion 102 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.

In some embodiments, the rotor support has a cover portion covering the axial one end; the cover part is provided with a plurality of ribs, and an exhaust port is formed between two adjacent ribs; the first surface of at least one of the plurality of ribs in the axial direction has a first inclined surface that is inclined in the circumferential direction.

In some embodiments, the rib further has a second inclined surface inclined in the circumferential direction on a second surface in the axial direction.

According to the embodiment of the application, the inclined heat dissipation holes are formed in the rotor bracket to increase air flow, so that a cooling fan can be omitted, the number of parts is reduced, the cost is reduced, and the miniaturization is facilitated; in addition, the inclined heat dissipation holes enable air to flow smoothly, and the air has high fluidity and high heat dissipation efficiency.

Examples of the third aspect

Embodiments of a third aspect of the present application provide an electrical product having a motor as described in embodiments of the first aspect. Since the structure of the motor 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.

In the embodiment of the present application, the electric product may be any device provided with a motor, such as an electric tool, a blower, a sweeping robot, a vacuum cleaner, an oven, a refrigerator, and the like.

It is to be noted that the above merely illustrates the embodiments of the present application, but the embodiments of the present application are not limited thereto, and may be modified as appropriate based on the above embodiments. In addition, the above is only an exemplary description of each component, but the embodiments of the present application are not limited thereto, and the specific content of each component may also refer to the related art; it is also possible to add components not shown in the figures or to reduce one or more components in the figures.

The embodiments of the present application have been described in conjunction with specific embodiments, but it should be clear to those skilled in the art that these descriptions are only illustrative and not intended to limit the scope of the embodiments of the present application. Various modifications and adaptations to the embodiments of the present application may occur to those skilled in the art based upon the spirit and principles of the embodiments of the present application and are within the scope of the embodiments of the present application.

Preferred embodiments of the present application are described above with reference to the accompanying drawings. The many features and advantages of the embodiments are apparent from the detailed specification, and thus, it is intended by the appended claims to cover all such features and advantages of the embodiments that fall within the true spirit and scope thereof. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the embodiments of the present application to the exact construction and operation illustrated and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope thereof.

Claims (12)

1. A motor, comprising:

a stationary part having a stator; and

a rotating portion having a magnet disposed radially outside the stator,

it is characterized in that the preparation method is characterized in that,

the rotating portion includes a cover portion that is axially opposed to the stator and covers one end in the axial direction;

the cover part is provided with a plurality of ribs, and an exhaust port is formed between two adjacent ribs; the first surface of at least one of the plurality of ribs in the axial direction has a first inclined surface that is inclined in the circumferential direction.

2. The motor according to claim 1, wherein the first inclined surface is inclined from the first surface to a first exhaust port in a circumferential direction, and a direction in which the first inclined surface is inclined from the first surface to the first exhaust port in the circumferential direction coincides with a direction in which the rotating portion rotates.

3. The motor according to claim 1, wherein the first inclined surface intersects with the first surface of the rib to form a first straight line portion.

4. The motor according to claim 3, wherein the first straight line portion is parallel to a first side surface on the first exhaust port side in the circumferential direction on the rib portion.

5. The motor according to claim 1, wherein the second surface of the rib in the axial direction further has a second inclined surface inclined in the circumferential direction.

6. The motor of claim 5, wherein the second inclined surface is inclined from the second surface to a second exhaust port in a circumferential direction, and a direction in which the second inclined surface is inclined from the second surface to the second exhaust port in the circumferential direction is opposite to a direction in which the rotating portion rotates.

7. The motor of claim 5, wherein the second inclined surface intersects the second surface of the rib to form a second linear portion.

8. The motor according to claim 7, wherein the second straight portion is parallel to a second side surface on the second exhaust port side in the circumferential direction on the rib portion.

9. The motor according to any one of claims 1 to 8, wherein the plurality of ribs is at least three in number, and the plurality of ribs are arranged at equal intervals in the circumferential direction.

10. The motor according to any one of claims 1 to 8, wherein the plurality of ribs are radially arranged, and a first length of the ribs in the circumferential direction on a radially inner side is smaller than a second length of the ribs in the circumferential direction on a radially outer side.

11. A rotor support is characterized in that a rotor support is arranged on the rotor support,

the rotor holder has a cover portion that covers one axial end;

the cover part is provided with a plurality of ribs, and an exhaust port is formed between two adjacent ribs; the first surface of at least one of the plurality of ribs in the axial direction has a first inclined surface that is inclined in the circumferential direction.

12. An electrical product, characterized in that it has a motor according to any one of claims 1 to 10.

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