KR20230101428A - Motor assembly for cleaner - Google Patents

Abstract

According to various embodiments, the motor assembly 100 for a vacuum cleaner may include a lower case, a connection portion extending upward from the lower case and having a smaller width than the lower case, and extending upward from the connection portion and having a wider width than the connection portion. A case 11 including an upper case having a motor 14 including a stator provided inside the upper case, a coil wound around the stator, and a rotor provided rotatably relative to the stator ), housings 12 and 13 fixed to the upper case and supporting the stator, a shaft 15 fixed to the rotor and rotatably connected to the housing, and fixed to the shaft, the motor It may include an impeller 16 located below.
In addition, various embodiments are possible.

Description

Motor assembly for cleaner {MOTOR ASSEMBLY FOR CLEANER}

Various embodiments of the present disclosure relate to a motor assembly for a vacuum cleaner.

An electric motor is a device that converts electrical energy into mechanical energy to obtain rotational power. Electric motors are widely used in various fields because they are easy to start and operate. Electric motors are widely used in precision machinery and portable devices because of their simple operation principle, low noise and vibration generation, and high output despite their small size and light weight.

In general, a vacuum cleaner is a device that sucks air from a surface to be cleaned, separates and collects dust or contaminants from the sucked air, and discharges the purified air to the outside of the main body. Such cleaners may be classified into canister-type cleaners, upright-type cleaners, handheld cleaners, stick-type cleaners, and the like, depending on their shapes. The vacuum cleaner may include a motor driven to generate a suction force. A motor is a machine that obtains rotational force from electrical energy, and includes a stator and a rotor, and may include an impeller that rotates together with the rotor to generate suction force.

In recent years, there has been an increasing trend in the use of cordless stick cleaners that are lightweight and easy to handle. Since the suction force of the cordless stick cleaner required in the market is gradually increasing, the motor for the cordless stick cleaner is also required to be miniaturized and have high power.

Since the temperature of the motor rises as the output increases, in order to suppress the temperature rise, the size of the motor must be increased to reduce the power density. Since it is difficult to increase the size of a cordless stick cleaning motor that needs to be miniaturized, a separate method for suppressing a temperature rise is required.

Various embodiments may provide a motor assembly for a vacuum cleaner.

According to various embodiments, the motor assembly 100 for a vacuum cleaner may include a lower case, a connection portion extending upward from the lower case and having a smaller width than the lower case, and extending upward from the connection portion and having a wider width than the connection portion. A case 11 including an upper case having a motor 14 including a stator provided inside the upper case, a coil wound around the stator, and a rotor provided rotatably relative to the stator ), housings 12 and 13 fixed to the upper case and supporting the stator, a shaft 15 fixed to the rotor and rotatably connected to the housing, and fixed to the shaft, the motor It may include an impeller 16 located below.

According to various embodiments, the motor assembly 300 for a vacuum cleaner includes a case, a stator provided inside the case, a coil wound around the stator, and a rotor provided rotatably relative to the stator. a motor fixed to the case and supporting the stator; a shaft fixed to the rotor and rotatably connected to the housing; and an impeller spaced apart from each other, wherein the housing includes an upper housing supporting an upper side of the stator and a lower housing supporting a lower side of the stator, and the lower housing includes a plurality of housings covering a lower side of the stator. lower housing arms, a lower housing body extending upward from at least some of the plurality of lower housing arms and supporting the stator, a plurality of lower housing rods protruding from the lower housing body toward the case, and the plurality of housing arms. A lower housing ring 336 connecting one end of the lower housing rods, having a ring shape, and capable of surface contact with the case may be included.

According to various embodiments, the motor assembly 100 for a vacuum cleaner may include a lower case, a connection portion extending upward from the lower case and having a smaller width than the lower case, and extending upward from the connection portion and having a wider width than the connection portion. A case 11 including an upper case having a motor 14 including a stator provided inside the upper case, a coil wound around the stator, and a rotor provided rotatably relative to the stator ), housings 12 and 13 fixed to the upper case and supporting the stator, a shaft 15 fixed to the rotor and rotatably connected to the housing, and fixed to the shaft, the motor It includes an impeller 16 located below, the center of the motor is located inside the upper case, and the air flowing along the inside of the case can flow toward the impeller after passing through the motor. there is.

According to various embodiments of the present disclosure, the motor assembly for a vacuum cleaner may cool the motor with relatively cool air before being compressed by locating the motor above the impeller.

According to various embodiments of the present disclosure, a motor assembly for a vacuum cleaner may provide a case in which a portion covering the motor and a portion covering the impeller are integrally formed, so that the shaft and the case may be concentric. When the shaft and the case are concentric, noise generation can be reduced.

According to various embodiments of the present disclosure, the motor assembly for a vacuum cleaner may assist air introduced into the case to sufficiently cool the motor by positioning the center of the motor lower than the top of the case.

In addition to this, various effects identified directly or indirectly through this document may be provided.

1A is a plan view of a motor assembly for a vacuum cleaner according to an embodiment.
FIG. 1B is a cross-sectional view of the motor assembly for a vacuum cleaner taken along the cutting line AA of FIG. 1A.
2 is a cross-sectional view of a motor assembly for a vacuum cleaner according to an embodiment.
3 is a cross-sectional view of a motor assembly for a vacuum cleaner according to an embodiment.
4 is a cross-sectional view of a motor assembly for a vacuum cleaner according to an embodiment.
5 is a cross-sectional view of a motor assembly for a vacuum cleaner according to an embodiment.
6 is a cross-sectional view of a motor assembly for a vacuum cleaner according to an embodiment.
7A is a cross-sectional view of a motor assembly for a vacuum cleaner according to an embodiment.
7B is a perspective view of a lower housing according to an embodiment.
7C is a plan view of a motor assembly for a vacuum cleaner according to an exemplary embodiment.
8 is a plan view of a motor assembly for a vacuum cleaner according to an embodiment.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. In the description with reference to the accompanying drawings, the same reference numerals are given to the same components regardless of reference numerals, and overlapping descriptions thereof will be omitted.

Various embodiments of this document and terms used therein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, like reference numbers may be used for like or related elements. The singular form of a noun corresponding to an item may include one item or a plurality of items, unless the relevant context clearly dictates otherwise. In this document, "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C", and "A Each of the phrases such as "at least one of , B, or C" may include any one of the items listed together in that phrase, or all possible combinations thereof. Terms such as "first", "second", or "first" or "secondary" may simply be used to distinguish a given component from other corresponding components, and may be used to refer to a given component in another aspect (eg, importance or order) is not limited. A (e.g., first) component is said to be "coupled" or "connected" to another (e.g., second) component, with or without the terms "functionally" or "communicatively." When mentioned, it means that the certain component may be connected to the other component directly (eg by wire), wirelessly, or through a third component.

According to various embodiments, each component (eg, module or program) of the components described above may include a single object or a plurality of objects, and some of the multiple objects may be separately disposed in other components. . According to various embodiments, one or more components or operations among the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (eg modules or programs) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by a corresponding component of the plurality of components prior to the integration. . According to various embodiments, operations performed by modules, programs, or other components are executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations are executed in a different order, omitted, or , or one or more other operations may be added.

FIG. 1A is a plan view of a motor assembly for a cleaner according to an embodiment, and FIG. 1B is a cross-sectional view of the motor assembly for a cleaner taken along a cut line A-A of FIG. 1A.

Referring to FIGS. 1A and 1B , a motor assembly 100 (hereinafter referred to as “motor assembly”) for a cleaner may be a motor assembly mounted on a cleaner (not shown). The motor assembly 100 includes a case 11, housings 12 and 13, a motor 14, a shaft 15, an impeller 16, a diffuser 17, and a fixing member 19. can include

In one embodiment, the motor assembly 100 may generate power through the motor 14 and transmit the power to other parts of the cleaner through the shaft 15 . The motor assembly 100 may have a structure for cooling internal parts, particularly the motor 14 . The impeller 16 provided inside the case 11 may rotate while being fixed to the shaft 15 . The impeller 16 may draw air outside the case 11 into the case 11 . As the impeller 16 rotates, outside air may enter the inside of the case 11 through an upper opening of the case 11 . Air entering the inside of the case 11 may flow downward. Air may pass through the motor 14 . Air may cool the motor 14. Air passing through the motor 14 may pass through the impeller 16 . As the air passes through the impeller 16, the temperature may rise. The air may pass through the motor 14 before passing the impeller 16 . Since the air passes through the motor 14 before the impeller 16, the air can cool the motor 14 at a relatively low temperature. Air passing through the impeller 16 may be discharged to the outside through the diffuser 17 .

Hereinafter, on the basis of the coordinate axis, the +z side is referred to as the upper side and the -z side is referred to as the lower side. The +z direction is referred to as upward and the -z direction as downward.

In one embodiment, the case 11 may configure the appearance (appearance) of the motor assembly 100. The case 11 may include an upper case 111 , a connecting portion 112 and a lower case 113 . The lower case 113 may support the diffuser 17 . The connecting portion 112 may extend upward from the lower case 113 and have a smaller width than the lower case 113 . The upper case 111 extends upward from the connecting portion 112 and may have a wider width than the connecting portion 112 . The upper case 111 may open upwardly, and the lower case 113 may open downwardly.

In one embodiment, the case 11 may be integrally configured. The case 11 may be one-body. According to this shape, it may be easy to maintain the concentricity of the case 11 and the shaft 15 .

In one embodiment, the connection part 112 and the lower case 113 may accommodate the impeller 16 . The upper case 111 may have a shape in which the width gradually decreases toward the connecting portion 112 . According to this shape, air entering the upper case 111 is concentrated in a direction toward the shaft 15, so that the motor 14 can be cooled more efficiently.

In one embodiment, the housings 12 and 13 may be fixed to the upper case 111 . The housings 12 and 13 may include an upper housing 12 supporting the upper side of the stator 141 and a lower housing 13 supporting the lower side of the stator 141 . At least one of the upper housing 12 and the lower housing 13 may be fixed to the upper case 111 . For example, the lower housing 13 may be fixed to the upper case 111 . For example, at least a portion of the lower housing 13 may be adhered to the upper case 111 . As another example, the lower housing 13 and the upper case 111 may have a structure coupled to each other.

In one embodiment, the motor 14 is relatively rotatable with respect to the stator 141 provided inside the upper case 111, the coil 142 wound around the stator 141, and the stator 141. It may include a rotor 143 provided to do so. For example, the rotor 143 may be provided inside the stator 141 .

In one embodiment, the stator 141 may be provided in plurality. A plurality of stators 141 may be arranged at equal intervals around the shaft 15 . For example, six stators 141 may be provided, and adjacent stators 141 may be disposed at intervals of 60 degrees.

In one embodiment, an air flow space (S) through which air can flow may be provided between two adjacent stators 141 . Air may flow through the air flow space S as well as the space between the motor 14 and the case 11 . For example, when 6 stators 141 are provided, 6 air flow spaces S may be provided. The air flowing in the air flow space S may cool not only the stator 141 but also the rotor 143 .

In one embodiment, the stator 141 may include a stator body 1411 and stator teeth 1412 disposed on upper and lower surfaces of the stator body 1411 and supporting the coil 142. there is. The stator teeth 1412 may prevent the coil 142 from being separated in the x-axis direction or the y-axis direction. For example, the stator tooth 1412 may include a pair of protrusions provided on both sides and protruding in the z-axis direction. The coil 142 may be provided between a pair of protrusions.

In one embodiment, the center (C) of the motor 14, may be located inside the upper case (111). In other words, the center C of the motor 14 may be provided at a position surrounded by the upper case 111 . At least half of the motor 14 may be provided in a state surrounded by the upper case 111 . According to this structure, air entering the inside of the case 11 may pass through more than half of the area of the motor 14 . The air can flow along an area of more than half of the area of the motor 14 to sufficiently cool the motor 14 .

In one embodiment, the shaft 15 may be fixed to the rotor 143. The shaft 15 may rotate simultaneously with the rotation of the rotor 143 . The shaft 15 may have a longitudinal direction in the z-axis direction. An upper portion of the shaft 15 may be fixed to the rotor 143 and a lower portion of the shaft 15 may be fixed to the impeller 16 . The shaft 15 may be provided concentrically with the case 11 .

In one embodiment, impeller 16 may be fixed to shaft 15 . The impeller 16 may be located below the motor 14 . The impeller 16 may generate a flow inside the case 11 through rotational force. As the impeller 16 rotates, a downward flow may be generated inside the case 11 . As the impeller 16 rotates, external air may enter the inside of the case 11 .

In one embodiment, the diffuser 17 may be connected to the lower case 113 . Air passing through the impeller 16 may pass through the diffuser 17 and be discharged to the outside.

In one embodiment, the fixing member 19 may fasten the upper housing 12 and the lower housing 13 . For example, the fixing member 19 may be a screw penetrating the upper housing 12 and the lower housing 13 . A plurality of fixing members 19 may be provided. In the drawing, although the number of fixing members 19 is shown as three, it should be noted that the number is not limited thereto.

In one embodiment, the upper housing 12 may include an upper housing head 121, an upper housing arm 122, an upper housing bearing 123, an upper housing body 124 and an upper housing rod 125. there is.

In one embodiment, the upper housing head 121 may surround one side of the shaft 15 . An inner surface of the upper housing head 121 may face an outer surface of the shaft 15 . For example, the upper housing head 121 may have a ring shape. The upper housing head 121 may connect one end of each of the plurality of upper housing arms 122 . For example, the upper housing head 121 may connect inner ends of the plurality of upper housing arms 122 .

In one embodiment, the upper housing arm 122 may cover the upper side of the stator 141 . The upper housing arm 122 may be positioned above the stator 141 . A plurality of upper housing arms 122 may be provided. The plurality of upper housing arms 122 may have a shape radially extending outward from the upper housing head 121 . For example, the plurality of upper housing arms 122 may be provided in the same number as the number of stators 141 .

In one embodiment, the upper housing arm 122 may overlap the stator 141 in the longitudinal direction of the shaft 15, that is, in the z-axis direction. For example, the upper housing arm 122 may have a relatively smaller width than the width of the stator 141 and may completely overlap the stator 141 based on the longitudinal direction of the shaft 15 . According to this structure, the upper housing arm 122 may not close at least a part of the air flow space S. The air flow space S may be open to the outside in the +z direction without being covered by the upper housing arm 122 .

In one embodiment, the upper housing bearing 123 may be disposed between the upper housing head 121 and the shaft 15 . The upper housing bearing 123 may support the shaft 15 to reduce or prevent shaking of the shaft 15 . The upper housing bearing 123 may assist the shaft 15 to smoothly rotate relative to the upper housing 12 .

In one embodiment, the upper housing body 124 extends downward from the upper housing arm 122 and may support the stator 141 . For example, a plurality of upper housing bodies 124 may be provided. For example, the plurality of upper housing bodies 124 may be provided in the same number as the number of the plurality of upper housing arms 122 . The upper housing body 124 may support the upper side of the stator 141 . For example, the upper housing body 124 may support the stator 141 while being in contact with a side surface of the stator 141 . For example, the upper housing body 124 may include a step portion capable of accommodating the stator 141 .

In one embodiment, the upper housing rod 125 may protrude from the upper housing body 124 toward the case 11 and be connected to the lower housing 13 . For example, the length direction of the upper housing body 124 may be formed in the z-axis direction, and the upper housing rod 125 may be formed in a direction perpendicular to the length direction of the upper housing body 124 . The upper housing rod 125 may have a relatively smaller thickness than the upper housing body 124 in the z-axis direction. According to this structure, the user can easily fasten the upper housing rod 125 to the lower housing 13 .

In one embodiment, the lower housing 13 may include a lower housing head 131, a lower housing arm 132, a lower housing bearing 133, a lower housing body 134, and a lower housing rod 135. there is.

In one embodiment, the lower housing head 131 may surround one side of the shaft 15 . An inner surface of the lower housing head 131 may face an outer surface of the shaft 15 . For example, the lower housing head 131 may have a ring shape. The lower housing head 131 may connect one end of each of the plurality of lower housing arms 132 . For example, the lower housing head 131 may connect inner ends of the plurality of lower housing arms 132 .

In one embodiment, the lower housing arm 132 may cover the lower side of the stator 141 . The lower housing arm 132 may be positioned below the stator 141 . A plurality of lower housing arms 132 may be provided. The plurality of lower housing arms 132 may have a shape radially extending outward from the lower housing head 131 . For example, the plurality of lower housing arms 132 may be provided in the same number as the number of stators 141 .

In one embodiment, the lower housing arm 132 may overlap the stator 141 in the longitudinal direction of the shaft 15, that is, in the z-axis direction. For example, the lower housing arm 132 may have a relatively smaller width than the width of the stator 141 and may completely overlap the stator 141 based on the longitudinal direction of the shaft 15 . In the z-axis direction, the upper housing arm 122, the stator 141, and the lower housing arm 132 may all overlap each other. According to this structure, the lower housing arm 132 may not close at least a part of the air flow space S. The air flow space S may be open to the outside in the -z direction without being covered by the lower housing arm 132 . Air entering the case 11 can flow smoothly in the air flow space S.

In one embodiment, the lower housing bearing 133 may be disposed between the lower housing head 131 and the shaft 15 . The lower housing bearing 133 may support the shaft 15 to reduce or prevent shaking of the shaft 15 . The lower housing bearing 133 may assist the shaft 15 to smoothly rotate with respect to the lower housing 13 .

In one embodiment, the lower housing body 134 extends upward from the lower housing arm 132 and may support the stator 141 . For example, a plurality of lower housing bodies 134 may be provided. For example, the plurality of lower housing bodies 124 may be provided in the same number as the number of the plurality of lower housing arms 132 . The lower housing body 134 may support the lower side of the stator 141 . For example, the lower housing body 134 may support the stator 141 while being in contact with a side surface of the stator 141 . For example, the lower housing body 134 may include a step portion capable of accommodating the stator 141 .

In one embodiment, the lower housing rod 135 protrudes from the lower housing body 134 toward the case 11 and may be connected to the upper housing 12 . For example, the lower housing rod 135 may be fastened to the upper housing rod 125 by the fixing member 19 . For example, the length direction of the lower housing body 134 may be formed in the z-axis direction, and the lower housing rod 135 may be formed in a direction perpendicular to the length direction of the lower housing body 134 . The lower housing rod 135 may have a relatively smaller thickness than that of the lower housing body 134 in the z-axis direction. According to this structure, the user can easily fasten the lower housing rod 135 and the upper housing rod 135 .

In one embodiment, at least one of the lower housing rod 135 and the upper housing rod 125 may be fixed to the case 11 . For example, the lower housing rod 135 may be connected to the case 11 . For example, the lower housing rod 135 may be connected to the upper case 111 . For example, an outer end of the lower housing rod 135 may be welded or bonded to the upper case 111 . As another example, the lower housing rod 135 may be fastened to the upper case 111 through members such as bolts and nuts.

2 is a cross-sectional view of a motor assembly for a vacuum cleaner according to an embodiment.

Referring to FIG. 2 , a motor assembly 200 (eg, the motor assembly 100 of FIG. 1 ) may include a case 21, an upper housing 22, a lower housing 23, and a fixing member 29. can

In one embodiment, the upper housing 22 may include an upper housing head 221, an upper housing arm 222, an upper housing bearing 223, an upper housing body 224 and an upper housing rod 225. there is.

In one embodiment, upper housing rod 225 may be connected to case 21 . For example, an outer end of the upper housing rod 235 may be welded or bonded to the case 21 . As another example, the upper housing rod 225 may be fastened to the case 21 through members such as bolts and nuts.

3 is a cross-sectional view of a motor assembly for a vacuum cleaner according to an embodiment.

Referring to FIG. 3 , a motor assembly 300 (eg, the motor assembly 100 of FIG. 1 ) may include a case 31, an upper housing 32, a lower housing 33, and a fixing member 39. can

In one embodiment, the lower housing 33 includes a plurality of lower housing bodies 334 supporting the stator, and a plurality of lower housing rods 335 extending from the lower housing body 334 toward the case 31. and a plurality of lower housing rods 335 connected to one end, having a ring shape, and a lower housing ring 336 capable of surface contact with the case 31 . The lower housing ring 336 is capable of surface contact with, for example, the upper case of the case 31 .

In one embodiment, the lower housing ring 336 may be welded or bonded to the case 31 . As another example, the lower housing ring 336 may be fastened to the case 31 through members such as bolts and nuts. The lower housing ring 336 may contact the case 31 with a relatively large area compared to the lower housing rod 335 . The lower housing ring 336 may assist parts provided inside the case 31 to prevent unintentional shaking.

4 is a cross-sectional view of a motor assembly for a vacuum cleaner according to an embodiment.

Referring to FIG. 4 , a motor assembly (eg, the motor assembly 100 of FIG. 1 ) may include a case 41 , an upper housing 42 , a lower housing 43 , and a fixing member 49 . The lower housing 43 may include a lower housing ring 436 .

In one embodiment, the lower housing ring 436 may be welded or bonded to the case 41 . As another example, the lower housing ring 436 may be fastened to the case 41 through members such as bolts and nuts.

In one embodiment, the upper end of the lower housing ring 436 may be located above the upper end of the upper case of the case 41 . According to this structure, the area of the structure surrounding the motor can be relatively large, and as a result, the air entering the inside of the case 41 and/or the lower housing ring 436 can operate the motor more efficiently. Can help with cooling. For example, air entering the inside of the case 41 and/or the lower housing ring 436 may flow along a relatively large outer surface of the motor.

5 is a cross-sectional view of a motor assembly for a vacuum cleaner according to an embodiment.

Referring to FIG. 5, a motor assembly 500 (eg, the motor assembly 100 of FIG. 1) may include a case 51, an upper housing 52, a lower housing 53, and a fixing member 59. can

In one embodiment, the upper housing 52 includes a plurality of upper housing bodies 524 supporting the stator and a plurality of upper housing rods 525 extending from the upper housing body 524 toward the case 51. and an upper housing ring 526 connecting one end of the plurality of upper housing rods 525, having a ring shape, and capable of surface contact with the case 51. The upper housing ring 526 is surface contactable to, for example, the upper case of the case 51 .

6 is a cross-sectional view of a motor assembly for a vacuum cleaner according to an embodiment.

Referring to FIG. 6 , a motor assembly 600 (eg, the motor assembly 100 of FIG. 1 ) may include a case 61, an upper housing 62, a lower housing 63, and a fixing member 69. can

In one embodiment, the case 61 is formed extending toward the motor from the upper case 611, the connection portion 612, the lower case 613, and the inner surface of the upper case 611 to form a lower housing 63 ) and/or a case arm 614 connected to the upper housing 62 . A plurality of case arms 614 may be provided. For example, the case arm 614 may be welded or bonded to the upper case 611 . As another example, the case arm 614 may be fastened to the upper case 611 through members such as bolts and nuts.

In one embodiment, the fixing member 69 , the case arm 614 , and the case arm 614 may be fastened to the upper housing 62 and/or the lower housing 63 .

7A is a cross-sectional view of a motor assembly for a cleaner according to an embodiment, FIG. 7B is a perspective view of a lower housing according to an embodiment, and FIG. 7C is a plan view of a motor assembly for a cleaner according to an embodiment.

Referring to FIGS. 7A to 7C , a motor assembly 700 (eg, the motor assembly 100 of FIG. 1 ) may include an upper housing 72 and a lower housing 73 .

In one embodiment, the lower housing 73 includes a lower housing head 731, a plurality of lower housing arms 732, a lower housing bearing 733, and a plurality of lower housing bodies 734 supporting the stator. ), a plurality of lower housing rods 735a extending from the plurality of lower housing bodies 734 toward the case), and a plurality of lower housing arms 732 that are not connected to the lower housing body 734. It may include a plurality of lower base rods 735b extending from the lower housing arms, and a lower housing ring 736 connecting one end of the plurality of lower base rods 735b and the plurality of lower housing rods 735a. can The lower housing ring 736 is surface contactable to the upper case.

In one embodiment, the plurality of lower housing arms 732 may be formed equal to the number of stators. For example, six lower housing arms 732 may be provided. The plurality of lower housing bodies 734 may be connected to three lower housing arms of the six lower housing arms 732 . Among the plurality of lower housing arms 732 , a lower housing arm connected to the lower housing body 734 and a lower housing arm not connected to the lower housing body 734 may be alternately provided. The plurality of lower housing rods 735a may be provided in three pieces, and the plurality of lower base rods 735b may be provided in three pieces. A plurality of lower housing rods 735a and a plurality of lower base rods 735b may be alternately provided.

In one embodiment, the position where the plurality of lower housing rods 735a are connected to the lower housing ring 736 may be lower than the position where the plurality of lower base rods 735b are connected to the lower housing ring 736. According to this structure, a phenomenon in which the motor and the shaft are shaken around the x-axis or shaken around the y-axis can be reduced or prevented.

In one embodiment, the lower housing ring 736 may be welded or glued to the case. As another example, the lower housing ring 736 may be fastened to the case through members such as bolts and nuts. The lower housing ring 736 may contact the case with a relatively large area compared to the lower housing rod 735a or the lower base rod 735b. The lower housing ring 736 may assist in preventing parts provided inside the case from being unintentionally shaken.

8 is a plan view of a motor assembly for a vacuum cleaner according to an embodiment.

Referring to FIG. 8 , a motor assembly 800 (eg, the motor assembly 100 of FIG. 1 ) according to an embodiment may include an upper housing 82 and a lower housing 83 .

In one embodiment, the upper housing 82 includes an upper housing bearing 823 supporting the shaft 85, an upper housing head 821 supporting the upper housing bearing 823, and an upper housing head 821. It may include an upper housing arm 822 extending outward from the upper housing arm 822 and an upper housing rod 825 connected to the upper housing arm 822 and fixed to the lower housing 83 by the fixing member 19 .

In one embodiment, the upper housing 82 may not have a ring-shaped upper housing body (eg, the upper housing body 124 of FIG. 1A ). For example, upper housing 82 may have three upper housing arms 822 . For example, three stators may be covered by the upper housing arm 822 in the z-axis direction, and the remaining three stators may not be covered by the upper housing arm 822 . A plurality of stators may be fixed by the lower housing 83 . The lower housing 83 may be connected to the case 81. According to various embodiments, the motor assembly 100 for a vacuum cleaner may include a lower case, and a lower case extending upward from the lower case and having a width smaller than that of the lower case. A case 11 including a connection part, an upper case extending upward from the connection part and having a wider width than the connection part, a stator provided inside the upper case, a coil wound around the stator, and the stator A motor 14 including a relatively rotatable rotor, housings 12 and 13 fixed to the upper case and supporting the stator, fixed to the rotor and rotatably connected to the housing It may include a shaft 15, and an impeller 16 fixed to the shaft and located below the motor.

In various embodiments, the center of the motor may be located inside the upper case.

In various embodiments, the lower housing may include a plurality of lower housing arms covering a lower side of the stator, and a lower housing body extending upward from at least a portion of the plurality of lower housing arms and supporting the stator. can

In various embodiments, the upper housing may include a plurality of upper housing arms covering an upper side of the stator.

In various embodiments, the stator, the lower housing arm, and the upper housing arm may overlap each other based on the length direction of the shaft.

In various embodiments, a plurality of stators may be provided, and an air flow space opened in a vertical direction may be provided between two adjacent stators among the plurality of stators.

In various embodiments, the lower housing may include a lower housing head connecting one end of each of the plurality of lower housing arms, a lower housing bearing disposed between the lower housing head and the shaft, and the case from the lower housing body. It may include a plurality of lower housing rods protruding toward each other.

In various embodiments, the upper housing may include an upper housing head connecting one end of each of the plurality of upper housing arms, an upper housing bearing disposed between the upper housing head and the shaft, and the plurality of lower housing rods. It may include a plurality of upper housing rods connected to.

In various embodiments, at least one of the lower housing rod and the upper housing rod may be fixed to the case.

In various embodiments, the lower housing may further include a lower housing ring that connects one end of the plurality of lower housing rods, has a ring shape, and is capable of surface contact with the upper case.

In various embodiments, an upper end of the lower housing ring may be positioned higher than an upper end of the upper case.

In various embodiments, the lower housing may include a plurality of lower base rods extending from lower housing arms not connected to the lower housing body among the plurality of lower housing arms, and the plurality of lower base rods and the plurality of lower housing arms. A lower housing ring connected to ends of the housing rods and capable of surface contact with the upper case may be further included.

In various embodiments, a position where the lower base rod is connected to the lower housing ring may be lower than a position where the lower housing rod is connected to the lower housing ring.

In various embodiments, the plurality of housing rods and the plurality of lower base rods may be alternately provided.

According to various embodiments, the motor assembly 300 for a vacuum cleaner includes a case, a stator provided inside the case, a coil wound around the stator, and a rotor provided rotatably relative to the stator. a motor fixed to the case and supporting the stator; a shaft fixed to the rotor and rotatably connected to the housing; and an impeller spaced apart from each other, wherein the housing includes an upper housing supporting an upper side of the stator and a lower housing supporting a lower side of the stator, and the lower housing includes a plurality of housings covering a lower side of the stator. lower housing arms, a lower housing body extending upward from at least some of the plurality of lower housing arms and supporting the stator, a plurality of lower housing rods protruding from the lower housing body toward the case, and the plurality of housing arms. A lower housing ring 336 connecting one end of the lower housing rods, having a ring shape, and capable of surface contact with the case may be included.

In various embodiments, the lower housing may further include a plurality of lower base rods extending from lower housing arms not connected to the lower housing body among the plurality of lower housing arms and fixed to the lower housing ring. .

In various embodiments, a position where the lower base rod is connected to the lower housing ring may be lower than a position where the lower housing rod is connected to the lower housing ring.

In various embodiments, the lower housing may further include a lower housing head connecting one end of each of the plurality of lower housing arms, and a lower housing bearing disposed between the lower housing head and the shaft.

According to various embodiments, the motor assembly 100 for a vacuum cleaner may include a lower case, a connection portion extending upward from the lower case and having a smaller width than the lower case, and extending upward from the connection portion and having a wider width than the connection portion. A case 11 including an upper case having a motor 14 including a stator provided inside the upper case, a coil wound around the stator, and a rotor provided rotatably relative to the stator ), housings 12 and 13 fixed to the upper case and supporting the stator, a shaft 15 fixed to the rotor and rotatably connected to the housing, and fixed to the shaft, the motor It includes an impeller 16 located below, the center of the motor is located inside the upper case, and the air flowing along the inside of the case can flow toward the impeller after passing through the motor. there is.

Motor assemblies for vacuum cleaners: 100
Case: 11
Upper housing: 12
Lower housing: 13
Motor: 14
Shaft: 15
Impeller: 16
Diffuser: 17
Fixed members: 19

Claims (20)

a case including a lower case, a connection part extending upward from the lower case and having a smaller width than the lower case, and an upper case extending upward from the connection part and having a wider width than the connection part;
a motor including a stator provided inside the upper case, a coil wound around the stator, and a rotor provided rotatably relative to the stator;
a housing fixed to the upper case and supporting the stator;
a shaft fixed to the rotor and rotatably connected to the housing; and
A motor assembly for a vacuum cleaner, comprising: an impeller fixed to the shaft and positioned below the motor.
According to claim 1,
The motor assembly for a vacuum cleaner, wherein the center of the motor is located inside the upper case.
According to claim 1,
the housing,
an upper housing supporting an upper side of the stator; and
A motor assembly for a vacuum cleaner comprising a lower housing supporting a lower side of the stator.
According to claim 3,
The lower housing,
a plurality of lower housing arms covering a lower side of the stator; and
and a lower housing body extending upward from at least some of the plurality of lower housing arms and supporting the stator.
According to claim 4,
The upper housing,
A motor assembly for a vacuum cleaner comprising a plurality of upper housing arms covering an upper side of the stator.
According to claim 5,
The motor assembly for a vacuum cleaner, wherein the stator, the lower housing arm, and the upper housing arm overlap each other in the longitudinal direction of the shaft.
According to claim 6,
The motor assembly for a vacuum cleaner, wherein a plurality of stators are provided, and an air flow space opened in a vertical direction is provided between two adjacent stators among the plurality of stators.
According to claim 5,
The lower housing,
a lower housing head connecting one end of each of the plurality of lower housing arms;
a lower housing bearing disposed between the lower housing head and the shaft; and
A motor assembly for a vacuum cleaner comprising: a plurality of lower housing rods protruding from the lower housing body toward the case.
According to claim 8,
The upper housing,
an upper housing head connecting one end of each of the plurality of upper housing arms;
an upper housing bearing disposed between the upper housing head and the shaft; and
A motor assembly for a cleaner, comprising: a plurality of upper housing rods connected to the plurality of lower housing rods.
According to claim 9,
At least one of the lower housing rod and the upper housing rod is fixed to the case.
According to claim 8,
The lower housing,
The motor assembly for a vacuum cleaner may further include a lower housing ring connected to one end of the plurality of lower housing rods, having a ring shape, and capable of surface-contacting with the upper case.
According to claim 11,
A motor assembly for a vacuum cleaner, wherein an upper end of the lower housing ring is positioned above an upper end of the upper case.
According to claim 8,
The lower housing,
a plurality of lower base rods extending from lower housing arms not connected to the lower housing body among the plurality of lower housing arms; and
The motor assembly for a vacuum cleaner, further comprising a lower housing ring connecting one end of the plurality of lower base rods and the plurality of lower housing rods and contacting a surface of the upper case.
According to claim 13,
A motor assembly for a vacuum cleaner, wherein a position where the lower base rod is connected to the lower housing ring is lower than a position where the lower housing rod is connected to the lower housing ring.
According to claim 13,
The motor assembly for a vacuum cleaner, wherein the plurality of housing rods and the plurality of lower base rods are alternately provided.
case;
a motor including a stator provided inside the case, a coil wound around the stator, and a rotor provided rotatably relative to the stator;
a housing fixed to the case and supporting the stator;
a shaft fixed to the rotor and rotatably connected to the housing; and
An impeller fixed to the shaft and spaced apart from the motor along the length direction of the shaft,
The housing includes an upper housing supporting an upper side of the stator and a lower housing supporting a lower side of the stator,
The lower housing,
a plurality of lower housing arms covering a lower side of the stator;
a lower housing body extending upward from at least a portion of the plurality of lower housing arms and supporting the stator;
a plurality of lower housing rods protruding from the lower housing body toward the case; and
A motor assembly for a vacuum cleaner comprising: a lower housing ring connected to one end of the plurality of lower housing rods, having a ring shape, and capable of making surface contact with the case.
17. The method of claim 16,
The lower housing,
The motor assembly for a vacuum cleaner may further include a plurality of lower base rods extending from lower housing arms not connected to the lower housing body among the plurality of lower housing arms and fixed to the lower housing ring.
18. The method of claim 17,
A motor assembly for a vacuum cleaner, wherein a position where the lower base rod is connected to the lower housing ring is lower than a position where the lower housing rod is connected to the lower housing ring.
17. The method of claim 16,
The lower housing,
a lower housing head connecting one end of each of the plurality of lower housing arms; and
A motor assembly for a cleaner, further comprising a lower housing bearing disposed between the lower housing head and the shaft.
a case including a lower case, a connection part extending upward from the lower case and having a smaller width than the lower case, and an upper case extending upward from the connection part and having a wider width than the connection part;
a motor including a stator provided inside the upper case, a coil wound around the stator, and a rotor provided rotatably relative to the stator;
a housing fixed to the upper case and supporting the stator;
a shaft fixed to the rotor and rotatably connected to the housing; and
An impeller fixed to the shaft and located below the motor,
The center of the motor is located inside the upper case,
The motor assembly for a vacuum cleaner according to claim 1 , wherein the air flowing along the inside of the case flows toward the impeller after passing through the motor.

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