Motor and cleaner comprising same

Abstract

This motor comprises: a motor body; a stator supported by the motor body; a rotor electromagnetically interacting with the stator and provided so as to rotate about a rotary shaft; an impeller coupled to one end of the rotor; and a weight balancer coupled to the rotor and disposed between the stator and the impeller. The weight balancer is provided to be accessible from the outside of the motor body.

Description

Motor and vacuum cleaner including same

[0001] The present disclosure relates to a motor including a motor body and a weight balancer having an improved structure, and a vacuum cleaner including the same.

[0002] Typically, a motor is a machine that obtains rotational power from electrical energy, and includes a stator and a rotor. The rotor is designed to interact electromagnetically with the stator and rotates due to the force acting between a magnetic field and the current flowing in the coil.

[0003] The motor may include a stator, a rotor configured to rotate, a motor body housing the stator and rotor, and an impeller that generates airflow. Additionally, the vacuum cleaner motor may include a weight balancer to compensate for any imbalance in the rotor.

[0004] A motor cover that covers the motor body may be coupled to the motor body. The motor cover may be coupled to the motor body to protect the motor body from friction caused by components around the motor.

[0005] The motor can be placed inside the body of the vacuum cleaner to generate power and can be used in various types of vacuum cleaners.

[0006] One aspect of the present disclosure provides a motor capable of easily compensating for unbalance of a rotor and a vacuum cleaner including the same.

[0007] One aspect of the present disclosure provides a motor capable of reducing vibration caused by rotor rotation and a vacuum cleaner including the same.

[0008] The technical problems to be achieved in this document are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0009] A motor according to the invention comprises a motor body, a stator supported on the motor body, a rotor electromagnetically interacting with the stator and configured to rotate about a rotational axis, an impeller coupled to one end of the rotor, and a weight balancer coupled to the rotor and disposed between the stator and the impeller. The weight balancer is configured to be accessible from the outside of the motor body.

[0010] A vacuum cleaner according to the invention comprises a suction head, a body communicating with the suction head, and a motor for forming a suction airflow from the suction head into the interior of the body. The motor comprises a stator, a rotor configured to electromagnetically interact with the stator and rotate about a rotational axis, and a motor body configured to accommodate at least a portion of the rotor. The motor body comprises a cover portion configured to accommodate at least a portion of the rotor, and a support portion formed to protrude from the cover portion toward the stator. The support portion forms an opening portion to allow access to another portion of the rotor from the outside of the motor body.

[0011] A motor according to the invention comprises a stator, a rotor electromagnetically interacting with the stator and configured to rotate about a rotational axis, an impeller coupled to one end of the rotor, a weight balancer coupled to the rotor and disposed between the stator and the impeller, and a motor housing accommodating the stator, the rotor, the impeller, and the weight balancer. The motor housing comprises a motor body defining a first space therein to accommodate the impeller, and a motor cover defining a second space therein to accommodate the stator and the weight balancer.

[0012] FIG. 1 is a drawing illustrating a vacuum cleaner according to one embodiment.

[0013] FIG. 2 is a drawing illustrating a motor according to one embodiment.

[0014] Figure 3 is a cross-sectional view of a motor according to one embodiment.

[0015] Figure 4 is a diagram illustrating an exploded view of a motor according to one embodiment.

[0016] FIG. 5 is a drawing illustrating a part of a motor according to one embodiment.

[0017] FIG. 6 is a drawing showing a motor cover coupled to a motor body according to one embodiment.

[0018] Fig. 7 is a drawing showing the motor cover combined with the motor body of Fig. 6 from a different angle.

[0019] FIG. 8 is a drawing illustrating a portion of a motor including a motor body according to one embodiment.

[0020] Fig. 9 is a drawing illustrating a motor body according to one embodiment.

[0021] Fig. 10 is a drawing showing the motor body of Fig. 9 from a different angle.

[0022] Fig. 11 is a drawing illustrating a motor cover according to one embodiment.

[0023] Figure 12 is a drawing showing the motor cover of Figure 11 from a different angle.

[0024] Fig. 13 is a drawing showing a motor housed in a motor case according to one embodiment.

[0025] The embodiments described in this specification and the configurations illustrated in the drawings are merely preferred examples of the disclosed invention, and there may be various modified examples that can replace the embodiments and drawings of this specification at the time of filing of this application.

[0026] Additionally, the same reference numbers or symbols presented in each drawing of this specification represent parts or components that perform substantially the same function.

[0027] In addition, the terminology used in this specification is used to describe embodiments and is not intended to limit and / or restrict the disclosed invention. The singular expression includes plural expressions unless the context clearly indicates otherwise. In this specification, the terms "comprises" or "has" and the like are intended to specify the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0028] Additionally, terms including ordinal numbers such as “first,” “second,” etc. used herein may be used to describe various components, but the components are not limited by the terms, and the terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. The term “and / or” includes any combination of a plurality of related listed items or any item among a plurality of related listed items.

[0029] Meanwhile, the shape and position of each component are not limited by the terms such as “front,” “back,” “left,” “right,” “upper,” and “lower” used in the description below.

[0030] When a component is said to be “connected,” “coupled,” “supported,” or “in contact with” another component, this includes not only cases where the components are directly connected, coupled, supported, or in contact, but also cases where the components are indirectly connected, coupled, supported, or in contact through a third component.

[0031] When we say that a component is "on" another component, this includes not only cases where the component is in contact with the other component, but also cases where there is another component between the two components.

[0032] When referring to the direction of rotation, clockwise may be referred to as the first direction, and counterclockwise, the direction opposite to the first direction, may be referred to as the second direction. While these expressions may be commonly used to describe specific details for implementing the invention, the rotational direction of the components of the present invention is not limited by these terms.

[0033] Hereinafter, a motor and a vacuum cleaner including the same according to various embodiments will be specifically described with reference to the attached drawings.

[0034] FIG. 1 is a drawing illustrating a vacuum cleaner according to one embodiment.

[0035] Referring to FIG. 1, a vacuum cleaner (1) according to one of various embodiments of the present invention may include a motor (100). At this time, the type of the vacuum cleaner (1) is not limited. For example, the motor (100) may be used in a stick-type vacuum cleaner or an upright-type vacuum cleaner. Furthermore, the motor (100) may be applied to various home appliances in addition to the vacuum cleaner (1). Hereinafter, a description will be given focusing on a stick-type vacuum cleaner including a motor (100).

[0036] A vacuum cleaner (1) may include a main body (12) and a suction head (16). The vacuum cleaner (1) may include an extension pipe (15) connecting the main body (12) and the suction head (16) and a handle (18) connected to the main body (12). The main body (12) and the suction head (16) may be connected to each other through the extension pipe (15).

[0037] A suction head (16) is provided at the lower portion of the main body (12) and can be positioned so as to come into contact with the surface to be cleaned. The suction head (16) can come into contact with the surface to be cleaned and suck dust or dirt from the surface to be cleaned into the interior of the main body (12) using suction force generated from the motor (100).

[0038] The suction head (16) includes a suction brush and can be attached to the surface to be cleaned to suck up air and foreign substances from the surface to be cleaned. The suction head (16) can be rotatably connected to the extension tube (15).

[0039] The extension pipe (15) can be formed of a pipe or flexible hose having a certain rigidity.

[0040] The vacuum cleaner (1) may include a motor (100). The motor (100) may generate power to generate suction force inside the main body (12). The motor (100) may be configured to form a suction air flow from the suction head (16) to the inside of the main body (12).

[0041] The vacuum cleaner (1) may include a motor case (17). The motor case (17) may be arranged to accommodate a motor (100) therein. At least a portion of the motor case (17) may be open to allow air to flow.

[0042] The extension tube (15) can transmit the suction force generated by the motor (100) inside the main body (12) to the suction head (16) and guide the air and foreign substances such as dust sucked through the suction head (16) to the main body (12).

[0043] The vacuum cleaner (1) may include a dust collector (11). The dust collector (11) may be provided to collect dust or dirt on the surface to be cleaned that is sucked in from the suction head (16) and moved into the interior of the main body (12).

[0044] The handle (18) is a part that is connected to the main body (12) and can be provided so that a user can hold and operate the vacuum cleaner (1). The handle (18) can be provided with an operating part (13) so that a user can operate the vacuum cleaner (1).

[0045] The main body (12) may include a control unit (13). The user can turn the vacuum cleaner (1) on / off or control the suction strength by operating the power button, etc. provided on the control unit (13).

[0046] The main body (12) may include a battery (14) provided to supply power necessary for driving the components of the vacuum cleaner (1).

[0047] FIG. 2 is a diagram illustrating a motor according to one embodiment. FIG. 3 is a cross-sectional view of a motor according to one embodiment. FIG. 4 is an exploded view of a motor according to one embodiment. FIG. 5 is a diagram illustrating a portion of a motor according to one embodiment.

[0048] Referring to FIGS. 2 to 5, the motor (100) may include a stator (130) and a rotor assembly (150). The rotor assembly (150) may include a rotor (151) and an impeller (152).

[0049] The stator (130) may include a rotor receiving portion (131), a stator coil (132), an insulator (133), and a stator core (134). The stator (130) may be configured to generate magnetic flux when current is applied to the stator coil (132).

[0050] A rotor receiving portion (131) may be provided to receive a rotor (151). The rotor receiving portion (131) may be provided at the center of a stator core (134). The rotor receiving portion (131) may be open on one side and the other side. A rotor core (1512), which will be described later, may be placed inside the rotor receiving portion (131).

[0051] The stator coil (132) can be wound around the stator core (134) while the insulator (133) is coupled to the stator core (134). In other words, the stator coil (132) can be wound around the insulator (133) surrounding the stator core (134).

[0052] A plurality of stator coils (132) may be provided. A plurality of stator coils (132) may be arranged to surround the rotor receiving portion (131).

[0053] The insulator (133) may be made of a material having electrical insulation properties. The insulator (133) may surround the stator core (134) to insulate the stator core (134) and the stator coil (132).

[0054] The stator core (134) can be opened on one side and the other side. A rotor receiving portion (131) and a stator coil (132) can be received inside the stator core (134).

[0055] The stator (130) may include an insertion groove (135) formed on the outer surface of the stator core (134). A stator coupling protrusion (2125), which will be described later, may be inserted into the insertion groove (135). The insertion groove (135) may extend along the direction of the rotation axis (R) along which the rotor (151) rotates.

[0056] The stator (130) may further include an insertion portion (136) provided at one end of the insulator (133). The insertion portion (136) may be provided to be inserted into a control portion (not shown).

[0057] The rotor (151) may include a rotor body (1511). The rotor body (1511) may include a cylindrical shape extending in the direction of the rotational axis (R) about which the rotor (151) rotates. However, the present invention is not limited thereto.

[0058] The rotor (151) may include a rotor core (1512) that is arranged to rotate inside the stator (130). The rotor core (1512) may be made of a permanent magnet having magnetic properties, or may include a coil having electromagnetic properties. Through this configuration, the rotor (151) may be arranged to electromagnetically interact with the stator (130) and rotate about a rotation axis (R). In one embodiment of the present invention, it is assumed that the rotor core (1512) is made of a permanent magnet.

[0059] The impeller (152) can be coupled to one end of the rotor (151). The impeller (152) can include a rotor coupling portion (1521) to which the rotor (151) is coupled. When the rotor (151) is coupled to the rotor coupling portion (1521), the impeller (152) can rotate together with the rotor (151). The impeller (152) can generate air flow by rotating while coupled to the rotor (151).

[0060] The impeller (152) may include a hub (1522). The hub (1522) may be configured to discharge air introduced in the direction of the rotation axis (R) in the radial direction of the rotor (151).

[0061] The hub (1522) may be provided so that its cross-sectional area decreases along the direction of the rotation axis (R) of the rotor (151). Specifically, the hub (1522) may be provided so that its cross-sectional area decreases upward when the rotor (151) is arranged to extend in the vertical direction. In other words, the hub (1522) may be formed to extend from the outer surface of the rotor coupling portion (1521) so that the rotor coupling portion (1521) is arranged at the center. At this time, the direction in which the hub (1522) extends from the outer surface of the rotor coupling portion (1521) may be defined as the outward direction.

[0062] The impeller (152) may include a plurality of blades (1523) protruding from one surface of the hub (1522). The plurality of blades (1523) may be arranged to form an airflow by rotating together with the hub (1522). The plurality of blades (1523) may be arranged on the outer surface of the hub (1522). The plurality of blades (1523) and the hub (1522) may be provided as one piece.

[0063] The impeller (152) has a plurality of blades (1523) so that air flowing in from the upper side of the hub (1522) can be discharged in the radial direction of the rotor (151).

[0064] The motor (100) may include a weight balancer (140). The weight balancer (140) may be coupled with a rotor (151). Specifically, the weight balancer (140) may be coupled with a rotor body (1511). However, the present invention is not limited thereto, and the weight balancer (140) may be formed integrally with the rotor body (1511).

[0065] The weight balancer (140) may be placed adjacent to one end (1512a) of the rotor core (1512). In other words, the weight balancer (140) may be placed at the center of the rotor (151).

[0066] The weight balancer (140) may be placed between the stator (130) and the impeller (152). The direction from the stator (130) toward the weight balancer (140) may be defined as the downward direction. That is, the weight balancer (140) may be positioned lower than the stator (130). The direction from the impeller (152) toward the weight balancer (140) may be defined as the upward direction. That is, the weight balancer (140) may be positioned higher than the impeller (152).

[0067] The weight balancer (140) may be provided to be cuttable to correct the unbalance of the rotor assembly (150) with respect to the rotation axis (R). That is, the weight balancer (140) may be provided to be cuttable to correct the unbalance of the rotor (151) and the impeller (152) with respect to the rotation axis (R). The unbalance of the rotor assembly (150) may mean that the center of gravity of the rotor assembly (150) is not located on the rotation axis (R).

[0068] The weight balancer (140) may be provided in a symmetrical shape with respect to the rotation axis (R) such that the center of gravity of the weight balancer (140) is located on the rotation axis (R). According to this configuration, the unbalance correction of the rotor assembly (150) through cutting the weight balancer (140) may be made easier. For example, the weight balancer (140) may be provided in a cylindrical shape. However, the present invention is not limited thereto.

[0069] The motor (100) generates large vibrations due to the high-speed rotation of the rotor (151), and these vibrations can be the main cause of noise in the vacuum cleaner (1). One way to reduce the vibrations generated by the motor (100) is to correct the imbalance of the rotor assembly (150).

[0070] A weight balancer (140) may be used to correct the imbalance of the rotor assembly (150). Specifically, the weight balancer (140) may be coupled to the rotor (151) of the rotor assembly (150). Thereafter, the weight balancer (140) may be appropriately cut so that the center of gravity of the rotor assembly (150) to which the weight balancer (140) is coupled is located on the rotation axis (R).

[0071] The motor (100) may include a bearing (160) mounted on the rotor (151). The bearing (160) may be arranged on the rotor body (1511) to rotatably support the rotor (151). The bearing (160) may be arranged to allow the rotor (151) to rotate about a rotation axis (R).

[0072] The bearing (160) can be placed apart from the weight balancer (140). Through this configuration, cutting of the weight balancer (140) can be made easier.

[0073] The bearing (160) may include a first bearing (161) and a second bearing (162).

[0074] The first bearing (161) may be positioned adjacent to the other end (1512b) of the rotor core (1512). In other words, the first bearing (161) may be positioned on the opposite side of the weight balancer (140) with respect to the stator (130). That is, the first bearing (161) may be positioned above the rotor core (1512).

[0075] The second bearing (162) may be positioned adjacent to the impeller (152). Specifically, the second bearing (162) may be positioned on the opposite side of the weight balancer (140) with respect to the impeller (152). That is, the second bearing (162) may be positioned lower than the impeller (152).

[0076] The motor (100) may include a diffuser (170). The diffuser (170) may include a diffuser body (171) that forms the outer shape of the diffuser (170). The diffuser (170) may include a diffuser upper surface (172). The diffuser (170) may include a diffuser flow path (173). The diffuser flow path (173) may be formed along the outer periphery of the diffuser upper surface (172).

[0077] The diffuser (170) may include diffuser vanes (174). The diffuser vanes (174) may be provided in multiples. The diffuser vanes (174) may be arranged to be inserted into the diffuser passage (173).

[0078] The diffuser (170) can be placed on the lower side of the impeller (152). Accordingly, the air discharged in the radial direction of the rotor (151) by the impeller (152) can flow into the diffuser passage (173), have its flow direction changed by the diffuser vane (174), and finally be discharged to the lower side of the diffuser (170).

[0079] The diffuser (170) may include a second bearing support (175). The diffuser (170) may include a diffuser hole (176). The second bearing support (175) may be provided in a substantially ring shape to support the second bearing (162). The second bearing support (175) may be formed at a central portion of the upper surface (172) of the diffuser. The second bearing support (175) may protrude from the upper surface (172) of the diffuser toward the impeller (152). The second bearing support (175) may form a diffuser hole (176). The second bearing (162) may be arranged in the diffuser hole (176).

[0080] The diffuser (170) may include a cover joint (177). A detailed description of the cover joint (177) will be described later.

[0081] The motor (100) may include a cover member (110). The motor (100) may include a fixing member (120) that supports the stator (130) to a motor body (2100) to be described later.

[0082] The cover member (110) may include a cover member body (111) forming an outer shape. The cover member body (111) may be provided in an approximately ring shape. The cover member body (111) may form a cover member hole (112) in the center. A first bearing support member (121) and a first bearing (161), which will be described later, may be arranged in the cover member hole (112).

[0083] The cover member (110) may include a cover member connecting portion (113) extending downward from the outer surface of the cover member body (111). The cover member connecting portion (113) may be connected to the motor body (2100) through a connecting portion insertion portion (2127) formed in a stator connecting portion (2124) to be described later. That is, the cover member (110) may be connected to the motor body (2100). The cover member connecting portion (113) and the motor body (2100) may be connected by a connecting portion (114) such as a screw, but the connecting method is not limited thereto. As the cover member connecting portion (113) is connected to the motor body (2100), the cover member (110) may be supported by a supporting portion (2120) to be described later.

[0084] The fixed member (120) may include a first bearing support member (121). The first bearing support member (121) may be formed in an approximately ring shape. The first bearing support member (121) may have a fixed member hole (122) formed in the center. A first bearing (161) may be placed in the fixed member hole (122).

[0085] The fixed member (120) can be coupled with the stator (130). Specifically, the fixed member (120) can be coupled with the stator (130) by the first bearing support member (121) being inserted into the cover member hole (112) and fixed to the cover member (110). Through this, the fixed member (120) can cover the upper portion of the stator (130).

[0086] The fixed member (120) may include a fixed member connecting portion (123). The fixed member connecting portion (123) may be formed to extend downward from the outer surface of the first bearing support portion (121). The fixed member connecting portion (123) may contact the side surface of the stator (130) to support the stator (130).

[0087] Fig. 6 is a drawing illustrating a motor cover coupled to a motor body according to one embodiment. Fig. 7 is a drawing illustrating a motor cover coupled to the motor body of Fig. 6 from a different angle.

[0088] Referring to FIGS. 4, 6 and 7, the motor (100) may include a motor housing (2000) that accommodates a stator (130), a rotor (151), an impeller (152) and a weight balancer (140).

[0089] A motor housing (2000) may include a motor body (2100). The motor housing (2000) may include a motor cover (2200) coupled with the motor body (2100). The motor body (2100) may form an accommodation space (2001) together with the motor cover (2200) to accommodate a stator (130), a rotor (151), an impeller (152), and a weight balancer (140). The accommodation space (2001) may include a first space (2101) formed by the motor body (2100) and a second space (2201) formed by the motor cover (2200). Specifically, the motor body (2100) may form a first space (2101) therein to accommodate at least a portion of the rotor (151) and the impeller (152). The motor cover (2200) may form a second space (2201) therein to accommodate another portion of the rotor (151), the stator (130), and the weight balancer (140). At this time, the weight balancer (140) may be coupled to another portion of the rotor (151). Through this configuration, when the motor cover (2200) is not coupled to the motor body (2100), the weight balancer (140) may be accessible from the outside of the motor body (2100) (see FIG. 8).

[0090] FIG. 8 is a drawing illustrating a portion of a motor including a motor body according to one embodiment. FIG. 9 is a drawing illustrating a motor body according to one embodiment. FIG. 10 is a drawing illustrating the motor body of FIG. 9 from a different angle.

[0091] Referring to FIGS. 4 and 8 to 10, the motor body (2100) may include a cover portion (2110) that covers at least a portion of the impeller (152). Specifically, the cover portion (2110) may cover the outer surface of the hub (1522) of the impeller (152). The cover portion (2110) may accommodate at least a portion of the rotor (151).

[0092] The cover portion (2110) may include an impeller cover (2111) configured to surround the impeller (152). The impeller cover (2111) may have a shape whose cross-section widens as it goes downward. For example, the impeller cover (2111) may have a hollow hemispherical shape with an open lower portion. However, the shape of the impeller cover (2111) is not limited thereto.

[0093] The cover portion (2110) may include a diffuser coupling portion (2112). The diffuser coupling portion (2112) may be provided to extend downward from the outer periphery of the lower portion of the impeller cover (2111). The cover coupling portion (177) of the diffuser (170) may be inserted into the diffuser coupling portion (2112). Through this, the diffuser (170) may be coupled to the cover portion (2110) and coupled to the motor body (2100).

[0094] The cover part (2110) may include a motor body hole (2113). The motor body hole (2113) may be provided on the upper side of the impeller cover (2111). Air may be introduced into the motor body hole (2113) through the motor body hole (2113).

[0095] The cover portion (2110) may include an outlet (2114) provided to discharge air. The outlet (2114) may include an opening formed by the diffuser coupling portion (2112). At least a portion of the diffuser (170) may be disposed within the outlet (2114). Specifically, a diffuser upper surface (172), a second bearing support (175), and a diffuser hole (176) may be disposed within the outlet (2114). The outlet (2114) may guide air to flow into the diffuser passage (173).

[0096] The exhaust port (2114) may be formed on the opposite side of the motor body hole (2113) with respect to the motor body (2100). In other words, the exhaust port (2114) may be formed on one side of the motor body (2100), and the motor body hole (2113) may be formed on the other side of the motor body (2100).

[0097] The exhaust port (2114) can be connected to the motor body hole (2113) to allow air to flow within the first space (2101). Through this configuration, the exhaust port (2114) can discharge air drawn in through the motor body hole (2113) to the outside of the motor body (2100).

[0098] The cover portion (2110) may include an inner surface (2115) of the cover portion. Protruding ribs (2116, 2117) may be formed on the inner surface (2115) of the cover portion. The protruding ribs (2116, 2117) may be provided to protrude inwardly along the inner surface (2115) of the cover portion.

[0099] The protruding ribs (2116, 2117) may include a first protruding rib (2116) and a second protruding rib (2117). The first protruding rib (2116) may be formed closer to the motor body hole (2113) than the second protruding rib (2117).

[0100] The motor body (2100) may include a support member (2120). The support member (2120) may support the stator (130). The support member (2120) may be formed to protrude from the cover member (2110) toward the stator (130).

[0101] The support member (2120) may form an inner space (2121). The inner space (2121) may be a part of the second space (2201) formed by the motor cover (2200). A weight balancer (140) may be placed in the inner space (2121).

[0102] The support member (2120) may include a support member (2122). The support member (2122) may be formed to extend in a direction parallel to the direction in which the rotational axis (R) of the rotor (151) extends from the cover member (2110). The support member (2122) may connect the stator coupling member (2124) to be described later and the cover member (2110).

[0103] The support (2122) may form an opening (2123) to allow access to the weight balancer (140) from the outside of the motor body (2100). The opening (2123) may be opened in the radial direction of the rotor (151).

[0104] As described above, the cover portion (2110) can accommodate at least a portion of the rotor (151). At this time, the support portion (2120) can form an opening (2123) to allow access to another portion of the rotor (151) from the outside of the motor body (2100).

[0105] A plurality of supports (2122) may be provided. Each of the plurality of supports (2122) may be spaced apart from each other to form an opening (2123). The spacing between the plurality of supports (2122) may be provided at the same interval. Although the drawing illustrates three supports (2122), the number of supports (2122) may vary.

[0106] A plurality of supports (2122) can be arranged along the outer periphery of the motor body hole (2113). Accordingly, a motor body hole (2113) can be located between the plurality of supports (2122).

[0107] The support member (2120) may include a stator coupling member (2124) that supports the stator (130). The stator coupling member (2124) may be formed to extend in a direction parallel to the direction in which the rotational axis (R) of the rotor (151) extends.

[0108] The support member (2120) may include a stator coupling protrusion (2125) formed on the stator coupling member (2124). The stator coupling protrusion (2125) may be inserted into an insertion groove (135) formed on the outer circumferential surface of the stator core (134). Through this configuration, the stator coupling member (2124) may be coupled with the stator (130) to support the stator (130).

[0109] The support member (2120) may include a support rib (2126). The support rib (2126) may be formed to protrude in the radial direction of the rotor (151) from the support member (2122) and the stator coupling member (2124). The direction in which the support rib (2126) protrudes may be away from the inner space (2121).

[0110] The support rib (2126) may be formed to extend along the direction in which the support member (2122) extends and to be connected to the cover member (2110). That is, the support rib (2126) may be formed to protrude from the cover member (2110) and to extend along the direction in which the support member (2122) extends.

[0111] The motor body (2100) may include a motor cover coupling portion (2130). The motor cover coupling portion (2130) may be formed along the outer periphery of the motor body hole (2113) and the outer surface of the support portion (2120). Specifically, the coupling portion (2130) may be formed to protrude outward from the outer periphery of the motor body hole (2113) and the outer surface of the support portion (2120). The motor cover coupling portion (2130) may be inserted into a motor body coupling groove (2218) to be described later. Through this configuration, the motor cover (2200) may be coupled to the motor body (2100).

[0112] Below, the process of assembling the motor (100) is roughly examined.

[0113] A rotor core (1512) may be coupled to a portion of a rotor body (1511). An impeller (152) may be coupled to one end of the rotor body (1511). A weight balancer (140) may be disposed between the rotor core (1512) and the impeller (152). A first bearing (161) may be disposed on an upper side of the rotor core (1512). A second bearing (162) may be disposed on a lower side of the impeller (152). The rotor (151) and the impeller (152) coupled to the rotor (151) may be defined as a rotor assembly (150). The rotor assembly (150) may be arranged to rotate by electromagnetically interacting with the stator (130).

[0114] The rotor assembly (150) may be accommodated in the motor body (2100) with the first bearing (161) facing upward and the second bearing (162) facing downward. When the rotor assembly (150) is accommodated in the motor body (2100), the cover member (110), the fixing member (120), and the stator (130) may be coupled to the motor body (2100).

[0115] When the rotor assembly (150) is inserted into the motor body (2100), the rotor body (1511) can be inserted into the motor body (2100) by sequentially penetrating the discharge port (2114), the motor body hole (2113), the inner space (2121) formed by the support member (2120), the rotor receiving portion (131), the fixing member hole (122), and the cover member hole (112).

[0116] A motor cover (2200) may be coupled to the upper side of the motor body (2100). If the motor cover (2200) is not coupled to the motor body (2100), the weight balancer (140) may be provided to be accessible through the opening (2123) of the motor body (2100). That is, the weight balancer (140) may be provided to be accessible before the manufacturing of the motor (100) is completely completed. Accordingly, the weight balancer (140) may be cut before the manufacturing of the motor (100) is completely completed, thereby correcting the unbalance of the rotor assembly (150). After the unbalance of the rotor assembly (150) is corrected, the motor cover (2200) may be coupled to the motor body (2100).

[0117] Fig. 11 is a drawing illustrating a motor cover according to one embodiment. Fig. 12 is a drawing illustrating the motor cover of Fig. 11 from a different angle.

[0118] Referring to FIGS. 4, 11, and 12, the motor cover (2200) may include a motor cover housing (2202) forming an outer shape. The motor cover housing (2202) may include, but is not limited to, a generally cylindrical shape.

[0119] The motor cover (2200) may include an intake port (2203) configured to intake air. The motor cover (2200) may include a motor cover hole (2204). The intake port (2203) may be formed to open on the upper side of the motor cover housing (2202). The motor cover hole (2204) may be formed to open on the lower side of the motor cover housing (2202).

[0120] The suction port (2203) may be formed on the opposite side of the motor cover hole (2204) with respect to the motor cover (2200). In other words, the suction port (2203) may be formed on one side of the motor cover (2200), and the motor cover hole (2204) may be formed on the other side of the motor cover (2200).

[0121] The intake port (2203) can be connected to the motor cover hole (2204) to allow air to flow within the second space (2201). Through this configuration, the motor cover hole (2204) can discharge air drawn in through the intake port (2203) to the outside of the motor cover (2200).

[0122] The motor cover hole (2204) and the motor body hole (2113) can be connected to allow air to flow inside the receiving space (2001).

[0123] When the rotor assembly (150) rotates and the impeller (152) causes air to flow from the upper side to the lower side, the air can flow into the motor cover housing (2202) through the intake port (2203). The air that has flowed into the motor cover housing (2202) is guided by the first guide surface (2209) and the second guide surface (2210) described later, and can flow into the motor cover hole (2204) and be discharged to the outside of the motor cover (2200). The discharged air can be drawn into the motor body hole (2113) of the motor body (2100), and then discharged through the impeller (152) and the exhaust port (2114) (see FIG. 3).

[0124] The motor cover (2200) may include a border portion (2205) formed along the border of the suction port (2203). The motor cover (2200) may include a connecting rib (2206) connecting the suction port (2203) and the border portion (2205). The connecting rib (2206) may be formed to protrude radially from the motor cover housing (2202). The border portion (2205) may be connected to the connecting rib (2206) and may be connected to the motor cover housing (2202).

[0125] The motor cover (2200) may include a housing side portion (2207). The motor cover (2200) may include a housing support portion (2208) formed on the housing side portion (2207) and arranged to extend in the vertical direction.

[0126] The motor cover (2200) may include a first guide surface (2209) and a second guide surface (2210) formed on the inner surface of the motor cover housing (2202). The first guide surface (2209) may be provided to cover the support portion (2120) while being spaced apart from the support portion (2120) when the motor cover (2200) is coupled to the motor body (2100).

[0127] The second guide surface (2210) may be extended downwardly from the first guide surface (2209) toward the impeller (152). In other words, the second guide surface (2210) may be formed by extending from the first guide surface (2209) such that the inner surface of the motor cover (2200) narrows from the support portion (2120) toward the cover portion (2110).

[0128] The motor cover (2200) may include a housing bottom portion (2216). The motor cover (2200) may include a motor cover extension portion (2211) formed to protrude downward from the housing bottom portion (2216).

[0129] The motor cover (2200) may include a support groove (2212) formed on the inner surface of the motor cover (2200). The support groove (2212) may be provided on the first guide surface (2209). The support groove (2212) may be formed to extend in a direction parallel to the direction in which the rotor (151) extends.

[0130] The support groove (2212) may include a support groove cutout (2213) that is formed by cutting out to open toward the inner surface of the motor cover housing (2202). The support groove cutout (2213) may be formed to extend in a direction parallel to the direction in which the rotor (151) extends along the support groove (2212).

[0131] When the motor cover (2200) is coupled to the motor body (2100), the support rib (2126) of the motor body (2100) can be inserted into the support groove (2212) of the motor cover (2200). Accordingly, the motor cover (2200) can be supported by the motor body (2100) and coupled with the motor body (2100). The support grooves (2212) can be formed in multiple numbers along the inner circumferential surface of the motor cover (2200).

[0132] The motor cover (2200) may include a through hole (2214, 2215) formed in the second guide surface (2210) so that the support (2122) and the support rib (2126) pass therethrough when coupled to the motor body (2100). More specifically, the motor cover extension (2211) may include a support rib through hole (2214) and a support through hole (2215) formed to open downward. The support rib through hole (2214), the support through hole (2215), and the motor cover hole (2204) may be connected to each other.

[0133] When the motor cover (2200) is coupled to the motor body (2100), the support (2122) of the motor body (2100) may be arranged to be inserted into the support through-hole (2215) of the motor cover (2200). When the motor cover (2200) is coupled to the motor body (2100), the support rib (2126) of the motor body (2100) may be arranged to be inserted into the support rib through-hole (2214) of the motor cover (2200). Therefore, the motor cover (2200) may be more stably mounted on the motor body (2100).

[0134] The motor cover (2200) may include a motor body coupling portion (2217) formed to extend downward. The motor body coupling portion (2217) may be formed to protrude downward from the housing bottom portion (2216). More specifically, the motor body coupling portion (2217) may be formed to protrude downward from the housing bottom portion (2216) to form a motor cover hole (2204) that communicates with the suction port (2203).

[0135] The motor body coupling portion (2217) may include a motor body coupling groove (2218). The motor cover coupling portion (2130) of the motor body (2100) may be coupled to the motor body coupling groove (2218). For example, the motor cover coupling portion (2130) may be formed to protrude outward, and the motor body coupling groove (2218) may be formed to be recessed in the direction in which the motor cover coupling portion (2130) protrudes, so that they may be coupled to each other.

[0136] Fig. 13 is a drawing showing a motor housed in a motor case according to one embodiment.

[0137] The motor cover (2200) may include a rubber material. Through this configuration, the motor cover (2200) can seal between the motor case (17) and the motor (100).

[0138] The outer surface of the frame (2205) can be in contact with the inner surface of the motor case (17). The frame (2205) can be made of a rubber material and can be provided to contact the motor case (17) and at the same time seal between the motor case (17) and the motor (100). That is, the motor cover (2200) can be provided to accommodate the stator (130), the weight balancer (140), and the rotor (151) and at the same time seal between the motor (100) and the motor case (17).

[0139] A motor (100) according to the invention includes a motor body (2100), a stator (130) supported by the motor body (2100), a rotor (151) arranged to electromagnetically interact with the stator (130) and rotate about a rotation axis (R), an impeller (152) coupled to one end of the rotor (151), and a weight balancer (140) arranged between the stator (130) and the impeller (152). The weight balancer (140) is arranged to be accessible from the outside of the motor body (2100).

[0140] The motor body (2100) may include a cover portion (2110) that covers at least a portion of the impeller (152) and a support portion (2120) that is formed to protrude from the cover portion (2110) toward the stator (130) to support the stator (130).

[0141] The above weight balancer (140) can be placed in the inner space (2121) formed by the support member (2120).

[0142] The above support member (2120) may include a stator coupling member (2124) that is coupled with the stator (130) to support the stator (130) and a support member (2122) that connects the stator coupling member (2124) and the cover member (2110). The support member (2122) may form an opening (2123) to enable access to the weight balancer (140) from the outside of the motor body (2100).

[0143] The above support (2122) is provided in multiple pieces, and each of the multiple supports (2122) can be spaced apart from each other to form the opening (2123).

[0144] It further includes a motor cover (2200) coupled with the motor body (2100), and the motor cover (2200) can form an accommodation space (2001) together with the motor body (2100) to accommodate the stator (130), the rotor (151), the impeller (152), and the weight balancer (140).

[0145] The above motor cover (2200) may include an intake port (2203) formed on one side of the motor cover (2200) and configured to suck in air, and the above motor body (2100) may include an exhaust port (2114) formed on one side of the motor body (2100) and configured to discharge air.

[0146] The above motor cover (2200) may further include a motor cover hole (2204) formed on the other side of the motor cover (2200). The above motor body (2100) may further include a motor body hole (2113) formed on the other side of the motor body (2100). The hole of the motor cover (2200) and the hole of the motor body (2100) may be connected to allow air to flow within the receiving space (2001).

[0147] The above motor cover (2200) may further include a border portion (2205) formed along the border of the suction port (2203) and a connecting rib (2206) connecting the suction port (2203) and the border portion (2205).

[0148] The above weight balancer (140) may be provided to be cut to correct the imbalance of the rotor (151) with respect to the rotation axis (R).

[0149] The above weight balancer (140) may be provided in a symmetrical shape with respect to the rotation axis (R) so that the center of gravity of the weight balancer (140) is located on the rotation axis (R).

[0150] The rotor (151) further includes a bearing (160, 161, 162) mounted on the rotor (151) so that the rotor (151) rotates about the rotation axis (R), and the weight balancer (140) can be arranged spaced apart from the bearing (160, 161, 162).

[0151] The above bearing (161) can be placed on the opposite side of the weight balancer (140) with respect to the stator (130).

[0152] The above bearing (162) can be placed on the opposite side of the weight balancer (140) with respect to the impeller (152).

[0153] The above motor cover (2200) may include a rubber material.

[0154] A vacuum cleaner (1) according to the invention includes a suction head (16), a main body (12) communicating with the suction head (16), and a motor (100) that forms a suction airflow from the suction head (16) into the interior of the main body (12). The motor (100) includes a stator (130), a rotor (151) that electromagnetically interacts with the stator (130) and rotates about a rotation axis (R), and a motor body (2100) that accommodates at least a portion of the rotor (151). The motor body (2100) includes a cover portion (2110) that accommodates at least a portion of the rotor (151), and a support portion (2120) that protrudes from the cover portion (2110) toward the stator (130). The above support member (2120) forms an opening (2123) to enable access to another part of the rotor (151) from the outside of the motor body (2100).

[0155] The above motor (100) may further include a weight balancer (140) coupled to another part of the above rotor (151).

[0156] The above motor (100) may further include a motor cover (2200) that is coupled to the motor body (2100) and includes a rubber material.

[0157] The motor cover (2200) may further include a motor case (17) that accommodates the motor (100) therein, and the motor cover (2200) may include a frame portion (2205) that is provided to seal between the motor case (17) and the motor (100).

[0158] A motor (100) according to the invention includes a stator (130), a rotor (151) that electromagnetically interacts with the stator (130) and rotates about a rotation axis (R), an impeller (152) coupled to one end of the rotor (151), a weight balancer (140) coupled to the rotor (151) and arranged between the stator (130) and the impeller (152), and a motor housing (2000) that accommodates the stator (130), the rotor (151), the impeller (152), and the weight balancer (140). The above motor housing (2000) includes a motor body (2100) forming a first space (2101) therein to accommodate the impeller (152), and a motor cover (2200) forming a second space (2201) therein to accommodate the stator (130) and the weight balancer (140).

[0159] According to the concept of the present disclosure, since the weight balancer is configured to be accessible from the outside of the motor body, the unbalance of the rotor can be easily corrected by cutting the weight balancer during the manufacturing process of the motor.

[0160] According to the invention, by correcting the imbalance of the rotor, vibration of the motor caused by rotor rotation can be reduced.

[0161] The effects that can be obtained from the present disclosure are not limited to the effects mentioned above, and other effects that are not mentioned can be clearly understood by a person having ordinary skill in the art to which the present disclosure belongs from the description below.

[0162] The above illustrates and describes specific embodiments. However, the invention is not limited to the above-described embodiments, and those skilled in the art will readily appreciate that various modifications and implementations can be made without departing from the spirit and scope of the invention as set forth in the claims below.

Claims

1. Motor body; A stator supported on the above motor body; A rotor which electromagnetically interacts with the stator and is arranged to rotate about a rotation axis; an impeller coupled to one end of the above rotor; and Including a weight balancer arranged between the stator and the impeller, A motor in which the weight balancer is accessible from the outside of the motor body.

2. In paragraph 1, The above motor body, A cover portion covering at least a portion of the impeller; and A motor including a support portion formed to protrude from the cover portion toward the stator to support the stator.

3. In paragraph 2, The above weight balancer is a motor placed in the inner space formed by the above support member.

4. In paragraph 2, The above support part, A stator coupling portion coupled with the stator and supporting the stator; and Including a support connecting the stator joint and the cover part, A motor in which the support forms an opening to enable access to the weight balancer from the outside of the motor body.

5. In paragraph 4, The above supports are provided in multiple pieces, A motor in which each of the plurality of supports is spaced apart from each other to form the opening.

6. In paragraph 1, Further comprising a motor cover coupled with the above motor body, A motor in which the above motor cover forms an accommodation space together with the motor body to accommodate the stator, the rotor, the impeller, and the weight balancer.

7. In paragraph 6, The above motor cover includes an intake port formed on one side of the motor cover and configured to intake air, A motor having a motor body including an exhaust port formed on one side of the motor body and configured to exhaust air.

8. In paragraph 7, The above motor cover further includes a motor cover hole formed on the other side of the motor cover, The above motor body further includes a motor body hole formed on the other side of the motor body, A motor in which the above motor cover hole and the above motor body hole are connected to allow air to flow inside the receiving space.

9. In paragraph 7, The above motor cover, A border formed along the edge of the above suction port; and A motor further comprising a connecting rib connecting the suction port and the edge portion.

10. In paragraph 1, The above weight balancer is a motor that is provided to be cut to correct unbalance of the rotor and the impeller with respect to the rotation axis.

11. In paragraph 1, The above weight balancer is a motor provided in a symmetrical shape with respect to the rotation axis so that the center of gravity of the weight balancer is located on the rotation axis.

12. In paragraph 1, The rotor further includes a bearing mounted on the rotor so that the rotor rotates about the rotation axis, The above weight balancer is a motor arranged apart from the bearing.

13. In paragraph 12, A motor in which the above bearing is placed on the opposite side of the weight balancer with respect to the above stator.

14. In paragraph 12, A motor in which the above bearing is placed on the opposite side of the weight balancer with respect to the above impeller.

15. In paragraph 6, The above motor cover is a motor containing a rubber material.

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