CN215934536U - Motor and fan - Google Patents
Motor and fan Download PDFInfo
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- CN215934536U CN215934536U CN202121093173.4U CN202121093173U CN215934536U CN 215934536 U CN215934536 U CN 215934536U CN 202121093173 U CN202121093173 U CN 202121093173U CN 215934536 U CN215934536 U CN 215934536U
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Abstract
The embodiment of the application provides a motor and a fan, the motor includes a stator and a rotor, the stator includes a coil and a yoke covering the coil, the yoke includes a first yoke and a second yoke respectively disposed on one side of the coil in the axial direction and the other side of the coil in the axial direction, the first yoke and the second yoke respectively include a body and at least one extension unit extending from the outer end of the body in the radial direction in the axial direction, the extension unit includes a first extension portion, a second extension portion and a third extension portion sequentially arranged in the circumferential direction, at least the second extension portion and the third extension portion are provided with through holes penetrating in the radial direction, and the ratio of the total area of the through holes of the second extension portion to the area of the second extension portion is smaller than the ratio of the total area of the through holes of the third extension portion to the area of the third extension portion. Through this application embodiment, can avoid the natural stop position of motor and the not enough scope of moment of torsion to overlap, prevent that the motor from producing the dead point.
Description
Technical Field
The present application relates to the electromechanical field, and in particular, to a motor and a fan.
Background
The fan generally includes a motor, such as a single-phase or 2-phase motor, and the motor has a range in which a torque is smaller than a shaft friction, which may be referred to as an insufficient torque range, and in a state in which a stop position of a fan blade (which may be referred to as a natural stop position) overlaps with the insufficient torque range of the motor, the fan may fail to start by its own force, thereby generating a stop point (which may be referred to as a dead point).
It should be noted that the above background description is only for the convenience of clear and complete description of the technical solutions of the present application and for the understanding of those skilled in the art. Such 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 application.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a motor and a fan, avoids the motor to naturally stop in the insufficient torque range, avoids the natural stop position of motor and the insufficient torque range overlapping promptly, prevents that the motor from producing the dead point.
According to a first aspect of embodiments of the present application, there is provided a motor including:
a stator including a coil and a yoke covering the coil; and
a rotor provided on a radially outer side of the stator and facing the stator, the rotor including a rotor frame and a magnet provided on the rotor frame,
the magnetic yoke comprises a first magnetic yoke and a second magnetic yoke which are respectively arranged on one axial side and the other axial side of the coil,
the first and second yokes each include a body and at least one extension unit extending in an axial direction from a radially outer end of the body,
the extension unit comprises a first extension part, a second extension part and a third extension part which are sequentially arranged along the circumferential direction,
at least the second extension part and the third extension part are provided with through holes penetrating in the radial direction,
the ratio of the total area of the through holes of the second extension part to the area of the second extension part is smaller than the ratio of the total area of the through holes of the third extension part to the area of the third extension part.
In one or more embodiments, the first extension portion of the first yoke and the third extension portion of the second yoke are circumferentially adjacent, and the third extension portion of the first yoke and the first extension portion of the second yoke are circumferentially adjacent.
In one or more embodiments, the first extension is not provided with a through hole, or
The first extension part is provided with through holes extending in the radial direction, and the ratio of the total area of the through holes of the first extension part to the area of the first extension part is smaller than the ratio of the total area of the through holes of the second extension part to the area of the second extension part.
In one or more embodiments, the number of the through holes on the second extension portion is less than the number of the through holes on the third extension portion, and/or the aperture of the through holes on the second extension portion is less than the aperture of the through holes on the third extension portion.
In one or more embodiments, the through holes on the second extension part are arranged at equal intervals with a first interval,
the through holes on the third extending part are arranged at equal intervals with a second interval,
the first interval is greater than the second interval.
In one or more embodiments, the through-hole is circular.
In one or more embodiments, the second extension portion is provided with 2 through holes, and the third extension portion is provided with 3 through holes.
In one or more embodiments, the body of the yoke is provided with a center hole through which the rotating shaft of the motor passes.
In one or more embodiments, there is a space between the first extension and the second extension in the circumferential direction, and/or a space between the second extension and the third extension in the circumferential direction,
the spacing edge completely separates two adjacent extensions.
In one or more embodiments, the first yoke and the second yoke each have two of the extension units, and the extension unit of the first yoke and the extension unit of the second yoke are adjacent in the circumferential direction.
In one or more embodiments, the yoke and the coil are fixed by an adhesive.
According to a second aspect of embodiments of the present application, there is provided a fan having the motor of the first aspect described above.
One of the beneficial effects of the embodiment of the application lies in: the acting force between the extension unit of the magnetic yoke and the magnet is gradually enhanced or weakened in the circumferential direction, namely, the asymmetry of the acting force between the extension unit of the magnetic yoke and the magnet in the circumferential direction is enhanced, the motor is prevented from naturally stopping in the insufficient torque range, namely, the natural stopping position of the motor is prevented from being overlapped with the insufficient torque range, and the dead point of the motor is prevented from being generated.
Specific embodiments of the present application are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the application may be employed. 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.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, 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 an exploded schematic view of a fan having a motor in accordance with an embodiment of the first aspect;
FIG. 2 is an enlarged schematic view of the stator shown in FIG. 1;
fig. 3 is another schematic view of a stator of an embodiment of the first aspect 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 central axis OO 'of the motor of the fan is referred to as an "axial direction", and a radial direction centered on the central axis OO' is referred to as a "radial direction". The direction around the central axis OO' is referred to as "circumferential". It should be noted that these are for illustrative convenience only and do not limit the orientation of the fan and motor during use and manufacture.
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 an exploded schematic view of a fan having the motor. Fig. 2 is an enlarged schematic view of the stator shown in fig. 1. Fig. 3 is another schematic view of a stator of an embodiment of the first aspect of the present application, showing the components of fig. 2 in an assembled state.
As shown in fig. 1, the motor includes a stator 10 and a rotor 11, the stator 10 includes a coil 101 and a yoke 102 covering the coil 101, the rotor 11 is disposed radially outward of the stator 10 and faces the stator 10, and the rotor 11 includes a rotary shaft 14 centered on a central axis OO', a rotor frame 111, and a magnet 112 disposed on the rotor frame 111.
As shown in fig. 1, 2, and 3, the yoke 102 includes a first yoke 1021 and a second yoke 1022, which are respectively disposed on one axial side (O side) and the other axial side (O' side) of the coil 101.
As shown in fig. 2, each of the first and second yokes 1021 and 1022 includes a body and at least one extension unit extending in an axial direction from a radially outer end of the body, e.g., the first yoke 1021 includes a body 10211 and at least one extension unit 10212 extending in an axial direction from a radially outer end of the body 10211, the second yoke 1022 includes a body 10221 and at least one extension unit 10222 extending in an axial direction from a radially outer end of the body 10221,
In the embodiment of the present application, at least the second extending portions 10212b and 10222b and the third extending portions 10212c and 10222c are provided with through holes penetrating in the radial direction, and the ratio of the total area of the through holes of the second extending portions to the area of the second extending portions is smaller than the ratio of the total area of the through holes of the third extending portions to the area of the third extending portions.
For example, the ratio of the total area of the through holes h1 of the second extension portion 10212b to the area of the second extension portion 10212b is smaller than the ratio of the total area of the through holes h2 of the third extension portion 10212c to the area of the third extension portion 10212c, and the ratio of the total area of the through holes h3 of the second extension portion 10222b to the area of the second extension portion 10222b is smaller than the ratio of the total area of the through holes h4 of the third extension portion 10222c to the area of the third extension portion 10222 c.
As can be seen from the above embodiments, the acting force between the extension unit of the yoke 102 and the magnet 112 is gradually increased or decreased in the circumferential direction, that is, the asymmetry of the acting force between the extension unit of the yoke 102 and the magnet 112 in the circumferential direction is enhanced, the natural stop of the motor in the insufficient torque range, that is, the overlap of the natural stop position of the motor and the insufficient torque range is avoided, and the dead point of the motor can be prevented.
In the embodiment of the present application, the motor may be of various types, and further, the motor may include other components, such as a shaft, a bearing, etc., in addition to the stator 10 and the rotor 11, as referred to in the related art.
In the present embodiment, the yoke 102 may cover at least a portion of the coil 101.
In the embodiment of the present application, the total area of the through holes of the second extending portion is the sum of the areas of the through holes provided in the second extending portion, wherein the area of the through holes is the opening area of the through holes on the radial outer peripheral surface of the second extending portion, the area of the second extending portion is the area of the radial outer peripheral surface of the second extending portion, the total area of the through holes of the third extending portion is the sum of the areas of the through holes provided in the third extending portion, the area of the through holes is the opening area of the through holes on the radial outer peripheral surface of the third extending portion, and the area of the third extending portion is the area of the radial outer peripheral surface of the third extending portion.
As for the ratio of the total area of the through holes of the second extension portion to the area of the second extension portion, which is smaller than the ratio of the total area of the through holes of the third extension portion to the area of the third extension portion, the following description will be made by way of example.
For example, in one or more embodiments, the number of through holes on the second extension portion may be less than the number of through holes on the third extension portion, that is, the number of through holes h1 on the second extension portion 10212b may be less than the number of through holes h2 on the third extension portion 10212c, and the number of through holes h3 on the second extension portion 10222b may be less than the number of through holes h4 on the third extension portion 10222 c. For example, 2 through holes are formed in each of the second extending portions 10212b and 10222b, and 3 through holes are formed in each of the third extending portions 10212c and 10222 c. For example, 2 through holes may be provided in the second extending portion, 4 through holes may be provided in the third extending portion, 1 through hole may be provided in the second extending portion, and 2 through holes may be provided in the third extending portion, or 1 through hole may be provided in the second extending portion, and 3 through holes may be provided in the third extending portion, and the number of through holes provided in the second extending portion and the third extending portion may be other values so that the number of through holes in the second extending portion may be smaller than the number of through holes in the third extending portion.
However, it should be noted that, in the present application, the number of the through holes disposed on the second extending portion and the third extending portion is not particularly limited, and the number of the through holes on the second extending portion may be less than that of the through holes on the third extending portion so as to satisfy that the ratio of the total area of the through holes of the second extending portion to the area of the second extending portion is less than that of the total area of the through holes of the third extending portion to the area of the third extending portion.
Furthermore, in one or more embodiments, the aperture of the through hole on the second extension portion may be smaller than the aperture of the through hole on the third extension portion, that is, the aperture of the through hole h1 on the second extension portion 10212b is smaller than the aperture of the through hole h2 on the third extension portion 10212c, and the aperture of the through hole h3 on the second extension portion 10222b is smaller than the aperture of the through hole h4 on the third extension portion 10222 c. Therefore, the ratio of the total area of the through holes of the second extending portion to the area of the second extending portion can be smaller than the ratio of the total area of the through holes of the third extending portion to the area of the third extending portion, but the invention is not limited thereto, for example, the aperture of the through holes on the second extending portion may be equal to or larger than the aperture of the through holes on the third extending portion, and it is only necessary that the ratio of the total area of the through holes of the second extending portion to the area of the second extending portion is smaller than the ratio of the total area of the through holes of the third extending portion to the area of the third extending portion.
It should be noted that the first extension portion, the second extension portion, and the third extension portion are defined for convenience of description, and as for one extension portion unit of the first yoke 1021 or the second yoke 1022, when viewed in one circumferential direction, it is only necessary to have a structure in which an acting force between the extension portion unit of the yoke 102 and the magnet 112 is gradually increased or decreased in the circumferential direction, and for example, the through holes of the extension portion unit may be gradually increased in density or gradually decreased in the one circumferential direction.
In one or more embodiments, the through holes on the second extension portion may be disposed at equal intervals at a first interval, and the through holes on the third extension portion may be disposed at equal intervals at a second interval, the first interval being greater than the second interval. Accordingly, by forming the through holes at equal intervals in the second extending portion and the third extending portion, it is possible to ensure the reliability of the processing of forming the through holes, for example, the processing of forming the through holes is facilitated, and the reliability of the second extending portion and the third extending portion after the formation of the through holes is ensured. However, the present invention is not limited to this, and the through holes of the second extending portion and the third extending portion may be arranged at unequal intervals.
As shown in fig. 2 and 3, in one or more embodiments, the through-hole may be circular, i.e., a cross-section of the through-hole perpendicular to the radial direction is circular. This facilitates processing. However, the present application is not limited thereto, and the cross-sectional shape of the through-hole in the direction perpendicular to the radial direction may be other shapes, such as a triangle, a rectangle, and the like.
As shown in fig. 3, in one or more embodiments, the first extended portion 10212a of the first yoke 1021 and the third extended portion 10222c of the second yoke 1022 are adjacent in the circumferential direction, and the third extended portion 10212c of the first yoke 1021 and the first extended portion 10222a of the second yoke 1022 are adjacent in the circumferential direction. Accordingly, the force acting between the yoke 102 and the magnet 112 is periodically increased or decreased in the circumferential direction with respect to the entire yoke 102, and the different extension units are not symmetrical in the circumferential direction, so that the asymmetry can be further increased, and the possibility of no occurrence of dead spots can be improved.
In one or more embodiments, the first extension portions 10212a, 10222a may not be provided with a through hole, and thus, the process may be simplified and the processing cost may be reduced by not providing a through hole, but the present application is not limited thereto.
The first extending portions 10212a, 10222a may also be provided with through holes extending radially, the ratio of the total area of the through holes of the first extending portion to the area of the first extending portion is smaller than the ratio of the total area of the through holes of the second extending portion to the area of the second extending portion, for example, the ratio of the total area of the through holes of the first extending portion 10212a to the area of the first extending portion 10212a is smaller than the ratio of the total area of the through holes of the second extending portion 10212b to the area of the second extending portion 10212b, and the ratio of the total area of the through holes of the first extending portion 10222a to the area of the first extending portion 10222a is smaller than the ratio of the total area of the through holes of the second extending portion 10222b to the area of the second extending portion 10222 b. Therefore, the through holes can save the usage amount of the magnetic yokes, reduce the material cost and can be flexibly arranged according to the situation.
As shown in fig. 1, 2, and 3, in one or more embodiments, the first and second yokes each have two extension units, and the extension units of the first and second yokes are adjacent in the circumferential direction. For example, the number of the extension units of the first yoke and the number of the extension units of the second yoke may be equal or different, and the application is not limited thereto and may be selected according to actual needs.
As shown in fig. 1, 2 and 3, in one or more embodiments, the body of the yoke is provided with a central hole H through which the rotating shaft 14 of the motor passes. The inner magnet ring 13 can thus be arranged inside the stator by means of the rotary shaft 14.
In one or more embodiments, as shown in fig. 3, the first extension and the second extension have a gap G1 between them in the circumferential direction, and/or the second extension and the third extension have a gap G2 between them in the circumferential direction, the gap extending in the axial direction and completely separating the two adjacent extensions. Therefore, the first extension part, the second extension part and the third extension part are discontinuously arranged, so that the using amount of the magnetic yoke can be reduced, and the material cost is reduced. However, the present invention is not limited thereto, and for example, the first extension portion, the second extension portion, and the third extension portion may be continuously provided, thereby simplifying the process and reducing the process cost.
In one or more embodiments, the yoke and the coil may be fixed by an adhesive. Thereby, a reliable mounting between the yoke and the coil can be ensured, but the present application is not limited thereto, and the yoke and the coil may be fixed by other means.
According to the embodiment of the present application, the acting force between the extension unit of the yoke 102 and the magnet 112 is gradually increased or decreased in the circumferential direction, that is, the asymmetry of the acting force between the extension unit of the yoke 102 and the magnet 112 in the circumferential direction is enhanced, the natural stop of the motor in the insufficient torque range, that is, the overlap of the natural stop position of the motor and the insufficient torque range is avoided, and the dead point of the motor can be prevented.
Embodiments of the second aspect
Embodiments of the second aspect of the present application provide a fan 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.
As shown in fig. 1, the fan further includes an impeller 20, wherein the impeller 20 is connected to a radially outer end of the rotor 11 of the motor and rotates as the rotor 11 rotates.
In the embodiment of the present application, the fan may be applied to various devices including various home appliances, office automation equipment, industrial equipment, or components of various devices.
According to the embodiment of the present application, the acting force between the extension unit of the yoke 102 and the magnet 112 is gradually increased or decreased in the circumferential direction, that is, the asymmetry of the acting force between the extension unit of the yoke 102 and the magnet 112 in the circumferential direction is enhanced, the impeller 20 is prevented from being naturally stopped in the insufficient torque range, that is, the natural stop position of the impeller and the insufficient torque range of the motor are prevented from overlapping, and the fan can be prevented from generating a dead point.
It is to be noted that the above is merely an exemplary description of the present application, but the present application is not limited thereto, and appropriate modifications may be made on the basis of the above respective embodiments. In addition, the above is only an exemplary description of each component, but the present application is 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 present application has been described in conjunction with specific embodiments, but it should be understood by those skilled in the art that these descriptions are intended to be illustrative, and not limiting. Various modifications and adaptations of the present application may occur to those skilled in the art based on the teachings herein and are within the scope 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, the motor comprising:
a stator including a coil and a yoke covering the coil; and
a rotor provided radially outside the stator and facing the stator, the rotor including a rotating shaft centered on a central axis, a rotor frame, and a magnet provided on the rotor frame,
the magnetic yoke comprises a first magnetic yoke and a second magnetic yoke which are respectively arranged on one axial side and the other axial side of the coil,
it is characterized in that the preparation method is characterized in that,
the first and second yokes each include a body and at least one extension unit extending in an axial direction from a radially outer end of the body,
the extension unit comprises a first extension part, a second extension part and a third extension part which are sequentially arranged along the circumferential direction,
at least the second extension part and the third extension part are provided with through holes penetrating in the radial direction,
the ratio of the total area of the through holes of the second extension part to the area of the second extension part is smaller than the ratio of the total area of the through holes of the third extension part to the area of the third extension part.
2. The motor of claim 1,
the first extension portion of the first yoke and the third extension portion of the second yoke are adjacent in a circumferential direction,
the third extension portion of the first yoke and the first extension portion of the second yoke are adjacent in a circumferential direction.
3. The motor of claim 1,
the first extension portion is not provided with a through hole, or
The first extension part is provided with through holes extending in the radial direction, and the ratio of the total area of the through holes of the first extension part to the area of the first extension part is smaller than the ratio of the total area of the through holes of the second extension part to the area of the second extension part.
4. The motor of claim 1,
the number of the through holes on the second extending part is less than that of the through holes on the third extending part, and/or the aperture of the through holes on the second extending part is less than that of the through holes on the third extending part.
5. The motor of claim 1,
the through holes on the second extension part are arranged at equal intervals with a first interval,
the through holes on the third extending part are arranged at equal intervals with a second interval,
the first interval is greater than the second interval.
6. The motor of claim 1,
the through hole is circular.
7. The motor of claim 1,
the second extension part is provided with 2 through holes, and the third extension part is provided with 3 through holes.
8. The motor of claim 1,
the body of the magnet yoke is provided with a center hole, and a rotating shaft of the motor penetrates through the center hole.
9. The motor of claim 1,
a space is arranged between the first extension part and the second extension part in the circumferential direction, and/or a space is arranged between the second extension part and the third extension part in the circumferential direction,
the space completely separates two adjacent extensions.
10. The motor of claim 1,
the first and second yokes each have two of the extension units, and the extension unit of the first yoke and the extension unit of the second yoke are adjacent in the circumferential direction.
11. The motor of claim 1,
the yoke and the coil are fixed by an adhesive.
12. A fan, characterized in that the fan has a motor according to any one of claims 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121093173.4U CN215934536U (en) | 2021-05-20 | 2021-05-20 | Motor and fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121093173.4U CN215934536U (en) | 2021-05-20 | 2021-05-20 | Motor and fan |
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| Publication Number | Publication Date |
|---|---|
| CN215934536U true CN215934536U (en) | 2022-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121093173.4U Active CN215934536U (en) | 2021-05-20 | 2021-05-20 | Motor and fan |
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| CN (1) | CN215934536U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2619101A (en) * | 2022-05-23 | 2023-11-29 | Reckitt & Colman Overseas Hygiene Home Ltd | Fan for an automatic dispensing device |
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2021
- 2021-05-20 CN CN202121093173.4U patent/CN215934536U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2619101A (en) * | 2022-05-23 | 2023-11-29 | Reckitt & Colman Overseas Hygiene Home Ltd | Fan for an automatic dispensing device |
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