Motor and fan for sweeper

Abstract

The embodiment of the utility model provides a motor and a fan for a sweeper, and the motor comprises a rotor which is provided with a rotor support and a magnet disposed on the rotor support; a stator facing the rotor in the radial direction; the motor includes a rotor support that supports the rotor, a stator that supports the rotor, and a bearing that supports the rotor so as to be rotatable with respect to the stator, the motor further includes an annular balance correction portion that is provided on an outer peripheral side of the rotor support, and a part of the balance correction portion overlaps the rotor support when viewed in an axial direction. According to the embodiment of the invention, under the condition of realizing dynamic balance adjustment, the outer diameter of the motor can be reduced, and the miniaturization of the motor is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electromechanical technology, and in particular to a motor and a fan for a sweeper. BACKGROUND

[0002] Motors are widely used in various devices, such as air supply devices. A motor includes a stator and a rotor rotatable relative to the stator, and in addition, the motor usually further includes a dynamic balance correction component provided on the rotor to reduce the vibration of the motor and improve the stability of the motor in operation, etc.

[0003] In some existing structures, the dynamic balance correction component is provided on the outer periphery of the rotor. Such a structure results in a large overall outer diameter of the rotor and the dynamic balance correction component, which is not conducive to the miniaturization of the motor.

[0004] It should be noted that the above introduction to the technical background is only to facilitate a clear and complete description of the technical solutions of the present application, and to facilitate the understanding of those skilled in the art. The above technical solutions cannot be considered as known to those skilled in the art merely because they are described in the background section of the present application. SUMMARY

[0005] In order to solve at least one of the above problems or other similar problems, the embodiments of the present application provide a motor and a fan for a sweeper, which can achieve dynamic balance adjustment while reducing the outer diameter of the motor and realizing the miniaturization of the motor.

[0006] According to an embodiment of the first aspect of the present application, a motor is provided, the motor comprising:

[0007] a rotor having a rotor support and a magnet provided on the rotor support;

[0008] a stator opposite to the rotor in the radial direction; and

[0009] a bearing supporting the rotor to be rotatable relative to the stator;

[0010] wherein the motor further comprises a balance correction component in the form of a ring, the balance correction component is provided on the outer periphery of the rotor support, and a portion of the balance correction component overlaps the rotor support when viewed in the axial direction.

[0011] In at least one embodiment, the balance correction component comprises:

[0012] a plate portion extending in a direction intersecting the central axis of the rotor and axially overlapping the rotor support; and

[0013] a wall portion extending from the circumferential outer edge of the plate portion in the axial direction;

[0014] A groove portion for accommodating a balance correction material is formed between the plate portion and the wall portion.

[0015] In at least one embodiment, the number of the groove portions is plural, and the plural groove portions are circumferentially spaced apart.

[0016] In at least one embodiment, the balance correction portion further includes a plurality of division portions, and the plurality of division portions are circumferentially spaced apart on a radially inner side of the wall portion.

[0017] In at least one embodiment, the magnet is disposed on an inner circumferential surface of the rotor holder, a radially inner end surface of the plate portion abuts an outer circumferential surface of the magnet, and the wall portion abuts an outer circumferential surface of the rotor holder.

[0018] In at least one embodiment, the wall portion extends in an axial direction from a circumferential outer edge of the plate portion to both axial ends.

[0019] In at least one embodiment, the balance correction portion is integrally formed with the rotor holder.

[0020] In at least one embodiment, the balance correction portion is made of a resin material or a metal material.

[0021] In at least one embodiment, the rotor holder has a cylindrical portion extending in an axial direction, the magnet is disposed on an inner circumferential surface of the cylindrical portion, and an end portion on one axial side of the magnet is exposed from the cylindrical portion.

[0022] According to an embodiment of the second aspect of the present application, a blower for a cleaning machine is provided, the blower including the motor according to the embodiment of the first aspect of the present application.

[0023] An advantage of the embodiment of the present application is that the balance correction portion is disposed on an outer circumferential side of the rotor holder, and a portion of the balance correction portion overlaps the rotor holder as viewed in an axial direction. Thus, in a case where dynamic balance adjustment is achieved, the motor outer diameter can be reduced, and the motor can be miniaturized.

[0024] Certain embodiments of the application are disclosed in the specification and illustrated in the accompanying drawings by way of examples. The embodiments of the application provided herein are illustrative of the principles of the application and are not meant to limit the scope of the application. The application encompasses many changes and modifications within the spirit and scope of the appended claims along with their full scope of equivalents. It is therefore intended to embrace all known or convenient alternatives to the provisions outlined herein.

[0025] Features described and / or illustrated with respect to one implementation can be used in one or more other implementations in the same or similar manner, in combination with or in place of other features, or in combination with other features. BRIEF DESCRIPTION OF DRAWINGS

[0026] Elements and features depicted in one drawing or embodiment of the application can be combined with elements and features depicted in one or more other drawings or embodiments, as

[0027] The accompanying drawings are included to provide a further understanding of embodiments of the application, and are incorporated in and constitute a part of this specification, illustrate embodiments of the application, and together with the description serve to explain principles of the application. It is to be understood that other embodiments can be utilized, and structural and functional modifications can be made without departing from the scope of the present application. In the drawings, which are made part of this disclosure, and which are not intended to be limiting of the application, and which are depicted in the following illustrative embodiments:

[0028] Figure 1 is a schematic view of a motor of an embodiment of the application;

[0029] Figure 2 is another schematic view of a motor of an embodiment of the application;

[0030] Figure 3 is a schematic view of a motor taken along the central axis OO’ shown. Figure 2 DETAILED DESCRIPTION

[0031] The foregoing and other features of the present application are hereinafter more fully described, described, illustrated and particularly pointed out in the accompanying drawings and specification. In the following description, specific embodiments of the present application are disclosed in order to provide a thorough understanding of the application. It will be apparent, however, to one skilled in the art, that the specific embodiments of the application described herein can be readily substituted for, or modified into, other embodiments of the application, and that the present application is not limited to the embodiments described herein. The following description and drawings are illustrative of the principles of the present application.

[0032] In the present application, the term "and / or" includes any and all combinations of one or more of the associated listed terms. The terms "comprise", "comprising", "including", "including", "having" and their conjugates mean that the stated features, elements, components or integers are included, but not excluding the presence or addition of one or more other features, elements, components or integers.

[0033] In the present application, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. The terms "comprise", "comprising", "including", "including", "having" and their conjugates mean that the stated features, elements, components or integers are included, but not excluding the presence or addition of one or more other features, elements, components or integers. In addition, the term "according to" should be interpreted as "at least partially according to", the term "based on" should be interpreted as "at least partially based on", unless the context clearly dictates otherwise. ​

[0034] In the embodiments of the present application, for the convenience of description, the central axis OO' of the motor or the direction parallel to the central axis OO' is referred to as "axial direction", the radial direction centered on the axis is referred to as "radial direction", and the direction around the axis is referred to as "circumferential direction", but this is only for the convenience of description and does not limit the orientation of the motor and the fan in use and manufacture.

[0035] The various embodiments of the present application will be described below in conjunction with the accompanying drawings. These embodiments are only exemplary and are not limiting of the present application.

[0036] The present application provides a motor, Figure 1 is a schematic diagram of the motor of the present application, showing the case of cutting the motor along the axis.

[0037] As shown in Figure 1 , the motor 10 includes a rotor 11, a stator 12, and a bearing 13. The rotor 11 has a rotor support 111 and a magnet 112 provided on the rotor support 111, the stator 12 is opposite to the rotor 11 in the radial direction, and the bearing 13 supports the rotor 11 to be rotatable relative to the stator 12.

[0038] As shown in Figure 1 , the motor 10 further includes an annular balance correction portion 14, the balance correction portion 14 is provided on the outer circumferential side of the rotor support 111, and part of the balance correction portion 14 overlaps the rotor support 111 when viewed in the axial direction.

[0039] According to the present application, part of the balance correction portion 14 provided on the rotor support 111 overlaps the rotor support 111 when viewed in the axial direction, that is, part of the balance correction portion 14 is embedded in the rotor support 111 in the radial direction, so that the overall radial dimension of the rotor support 111 and the balance correction portion 14 can be reduced when the dynamic balance adjustment is achieved by the balance correction portion 14, the structure is more compact, and the motor can be miniaturized and lightened.

[0040] In the embodiments of the present application, the motor can be of various types, for example Figure 1 The motor 10 is shown as an external rotor motor, but the present application is not limited thereto. For the motor that needs to be provided with dynamic balance material, the structure of the balance correction portion and the connection mode between the balance correction portion and the rotor support of the present application can be used, so as to achieve the effect of considering dynamic balance correction and motor miniaturization. The motor of the present application can be applied to various devices or scenes, including but not limited to a fan for a sweeper, a robot sweeper, etc.

[0041] As shown in Figure 1As shown, in one or more embodiments, the rotor support 111 has an axially extending cylindrical portion 113, a magnet 112 is disposed on the inner circumferential surface of the cylindrical portion 113, and the end 112A of the magnet 112 on one axial side (O' side) protrudes from the cylindrical portion 113. Thus, while keeping the axial length of the rotor support constant, the axial length of the magnet can be increased, improving motor performance; while keeping the axial length of the magnet constant, the axial length of the rotor support can be shortened. When the magnet is bonded to the rotor support with adhesives such as glue, the amount of glue used can be reduced, lowering costs. Furthermore, since the area requiring adhesive application between the magnet and the rotor support is reduced, the assembly process can be optimized, production manpower reduced, and production efficiency improved.

[0042] However, this application is not limited to this. The positional relationship between the balance correction part and the rotor support can also be implemented in other ways. For example, the ends of the balance correction part and the rotor support on the axial O' side can be flush. In this case, the position of the balance correction part on the rotor support can form a plurality of recesses or through holes that are recessed radially inward from the outer peripheral surface. The balance correction part includes a plurality of protrusions that protrude radially inward and cooperate with the recesses or through holes. In this case, a part of the balance correction part 14 can also be embedded in the rotor support 111 in the radial direction. In addition, a gap for setting dynamic balance correction material can be formed between the part of the balance correction part that is not embedded in the rotor support and the rotor support. Thus, when viewed in the axial direction, a part of the balance correction part 14 provided on the rotor support 111 overlaps with the rotor support 111, thereby achieving the effect of both dynamic balance correction and motor miniaturization.

[0043] The following is Figure 1 The following is a detailed description of an embodiment in which the end 112A of the magnet 112 on one axial side (O' side) protrudes from the cylindrical portion 113.

[0044] like Figure 1 As shown, in one or more embodiments, the balance correction section 14 includes a plate portion 141 and a wall portion 142. The plate portion 141 extends along a direction intersecting the central axis OO' of the rotor 11 and overlaps axially with the rotor support 111. The wall portion 142 extends axially from the circumferential outer edge of the plate portion 141, that is, the wall portion 142 extends axially from the radially outer peripheral edge of the plate portion 141, or in other words, the wall portion 142 is disposed on the radially outer peripheral side of the plate portion 141. A groove portion 143 is formed between the plate portion 141 and the wall portion 142 for accommodating balance correction material. Thus, reliable dynamic balance correction can be achieved by using the groove portion 143 formed between the plate portion 141 and the wall portion 142 for accommodating balance correction material.

[0045] Figure 2is another schematic view of the motor of the embodiment of the present application, showing a case where the motor 10 is viewed from the axial direction O’ side.

[0046] As Figure 2 shown, the number of the groove portions 143 is plural, and the plural groove portions 143 are arranged at intervals in the circumferential direction of the wall portion. Thereby, it is possible to further achieve reliable dynamic balance correction.

[0047] Figure 3 is a schematic view of a partial structure observed when the motor 10 is cut along the central axis OO’. Figure 2

[0048] As Figure 2 and Figure 3 shown, the balance correction portion 14 further includes plural division portions 144, and the plural division portions 144 are arranged at intervals in the circumferential direction on the radially inner side of the wall portion 142. Thereby, it is possible to form the plural groove portions 143 for accommodating the balance correction material, and achieve reliable dynamic balance correction.

[0049] In the embodiment of the present application, as Figure 3 shown, the division portion 144 is a partition plate provided between the plate portion 141 and the wall portion 142, and in addition, the partition plate-shaped division portion 144 can also be in contact with the outer peripheral surface of the magnet 112. Thereby, the groove portion 143 is a space surrounded by the plate portion 141, the wall portion 142, the magnet 112, and the partition plate-shaped division portion 144, and it is possible to reliably accommodate the balance correction material, and achieve reliable dynamic balance correction.

[0050] However, the present application is not limited thereto, for example, the groove portion 143 can also have other structures, for example, it is also possible to form the groove portion by recessing the inner peripheral surface of the wall portion 142 toward the radially outer side, and the structure between the groove portions serves as the division portion, but the present application is not limited thereto, for example, it is also possible to form the groove portion by recessing the axial O’ side surface of the plate portion 141 toward the axial O side, or, recessing both the inner peripheral surface of the wall portion 142 and the axial O’ side surface of the plate portion 141 to form the groove portion, and the present application does not limit thereto.

[0051] As Figure 1 and Figure 3 ​As shown, in one or more embodiments, the magnet 112 is arranged on the inner circumferential surface of the rotor holder 111, the radially inner end surface of the plate portion 141 abuts against the outer circumferential surface of the magnet 112, and the wall portion 142 abuts against the outer circumferential surface of the rotor holder 111. Thus, the balance correction portion 14 abuts against both the rotor holder 111 and the magnet 112, and the balance correction portion 14 can be fixed to both the rotor holder 111 and the magnet 112 to achieve reliable connection between the balance correction portion 14 and the rotor, thereby ensuring reliable dynamic balance correction. For example, the balance correction portion 14 can be fixed by applying an adhesive for fixation to the portions in contact with the rotor holder 111 and the magnet 112 to achieve fixation therebetween.

[0052] For example, as shown in FIG. 1, the balance correction portion 14 can be arranged on the outer circumferential surface of the rotor holder 111. Figure 1 and Figure 3 As shown, in one or more embodiments, the wall portion 142 extends in the axial direction from the circumferential outer edge of the plate portion 141. That is, the balance correction portion 14 is in a "T" shape, the portion of the wall portion 142 extending in the axial O side abuts against the outer circumferential surface of the rotor holder 111, and the radially inner surface of the plate portion 141 extending in the direction intersecting the central axis OO' abuts against the outer circumferential surface of the magnet 112, thereby enabling reliable fixation of the balance correction portion 14. Here, the direction intersecting the central axis OO' can be understood as a radial direction or a direction having an included angle with the radial direction, and the included angle is less than 90 degrees. In addition, the portion of the wall portion 142 extending in the axial O' side can form a groove portion with the plate portion 141, the magnet 112, and the partition portion, thereby ensuring a space for accommodating the balance correction material.

[0053] However, the present application is not limited thereto, for example, as viewed in the axial cross section, the balance correction portion can also be in an "L" shape including two edges perpendicular to each other, one of which is inserted into the rotor holder or fixed to the axial O' side end surface of the rotor holder by an adhesive, and the inner circumferential surface of the other edge located on the outer circumferential side of the rotor holder is used to form a groove portion for accommodating the balance correction material.

[0054] In one or more embodiments, the balance correction portion can be integrally formed with the rotor holder, for example, the rotor holder is arranged and fixed in a mold, and the balance correction portion is formed by injection molding, thereby achieving integral formation of the balance correction portion and the rotor holder. Thus, reliable connection between the balance correction portion and the rotor holder can be achieved, thereby ensuring reliable dynamic balance correction.

[0055] In one or more embodiments, the balance correction portion is made of a resin material, thereby further achieving lightweight of the motor, but the present application is not limited thereto, for example, the balance correction portion can also be made of a metal material, and the present application does not limit this, and the selection can be made according to actual needs, thereby improving flexibility.

[0056] The embodiment of the present application provides a fan for a cleaning machine, and the fan for the cleaning machine comprises a motor 10, and the motor 10 is specifically described in the above embodiment, and the content is incorporated herein, and will not be repeated here.

[0057] According to the embodiment of the present application, part of the balance correction part of the motor is embedded in the rotor support in the radial direction, so that the overall radial size of the rotor support and the balance correction part can be reduced when the dynamic balance adjustment is realized by the balance correction part, the structure is more compact, the motor can be miniaturized and lightened, and the product performance is improved.

[0058] It is worth noting that the above Figures 1 to 3 Only the motor of the embodiment of the present application is schematically described, but the present application is not limited to this, and the specific content of each structure or component can also be referred to the related art, and in addition, the structure or component not shown in the above Figures 1 to 3 may be added, or one or more structures or components in the above Figures 1 to 3 may be reduced. Figures 1 to 3 The components or elements not specifically indicated in the above may be referred to the related art, and the present application is not limited to this.

[0059] The embodiment of the present application is described above in combination with the specific implementation, but those skilled in the art should know that these descriptions are exemplary, and are not a limitation on the protection scope of the embodiment of the present application. Those skilled in the art can make various modifications and changes to the embodiment of the present application according to the spirit and principle of the embodiment of the present application, and these modifications and changes are also within the scope of the embodiment of the present application.

[0060] The preferred embodiments of the present application are described above with reference to the accompanying drawings. Many features and advantages of these embodiments are clear according to the detailed description, and therefore the appended claims are intended to cover all these features and advantages falling within the true spirit and scope of these embodiments. In addition, since many modifications and changes are easily thought by those skilled in the art, the embodiments of the present application are not limited to the exact structure and operation exemplified and described, but can cover all suitable modifications and equivalents falling within the scope thereof.

Claims

1. A motor comprising: a rotor having a rotor holder and a magnet provided to the rotor holder; a stator opposed to the rotor in a radial direction; a bearing supporting the rotor to be rotatable with respect to the stator; and a balance correction portion provided to an outer circumferential side of the rotor holder, a part of the balance correction portion overlapping the rotor holder in an axial direction.

2. The motor according to claim 1, wherein the balance correction portion includes: a plate portion extending in a direction intersecting a central axis of the rotor and axially overlapping the rotor holder; and a wall portion extending from a circumferential outer edge of the plate portion in the axial direction; a groove portion is formed between the plate portion and the wall portion, the groove portion accommodating a balance correction material.

3. The motor according to claim 2, wherein a plurality of the groove portions are circumferentially spaced apart.

4. The motor according to claim 3, wherein the balance correction portion further includes a plurality of division portions circumferentially spaced apart on an inner radial side of the wall portion.

5. The motor according to claim 2, wherein the magnet is provided to an inner circumferential surface of the rotor holder, a radially inner end surface of the plate portion abutting an outer circumferential surface of the magnet, and the wall portion abutting an outer circumferential surface of the rotor holder.

6. The motor according to claim 2, wherein the wall portion extends in the axial direction from both ends of the circumferential outer edge of the plate portion.

7. The motor according to claim 1, wherein the balance correction portion is integrally formed with the rotor holder.

8. The motor according to claim 1, wherein the balance correction portion is made of a resin material or a metal material.

9. The motor according to claim 1 or 2, wherein the rotor holder has a cylindrical portion extending in the axial direction, the magnet is provided to an inner circumferential surface of the cylindrical portion, and an end portion on one axial side of the magnet is exposed from the cylindrical portion. The blower includes the motor according to any one of claims 1 to 9. ​ 10. A fan for a sweeper, characterized by ​

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