COVER ARRANGEMENT AND MOTOR SO THAT

Description

[Technical Field]

[0001] The present invention relates to a cover assembly and a motor including the same.[Background Art]

[0002] A motor is an apparatus configured to convert electric energy to rotational energy using a force applied to a conductor in a magnetic field. Recently, with the expansion of a use of the motor, the role of the motor has become important. Particularly, as more electric devices are used in a vehicle, demands for a motor applied to a steering system, a braking system, a machinery system, and the like are greatly increasing.

[0003] Generally, a motor includes a rotating shaft which is rotatably formed, a rotor coupled to the rotating shaft, and a stator fixed in a housing, and the stator is installed to be spaced a gap from a circumference of the rotor. In addition, coils, which generate a rotational magnetic field, are wound around the stator to induce an electrical interaction with the rotor so that the rotor rotates. As the rotor rotates, the rotating shaft rotates to generate a driving force.

[0004] In addition, a busbar electrically connected to the coils is disposed on an upper end of the stator. The busbar includes a busbar housing and a busbar terminal coupled to the busbar housing and connected to the coil. Here, the busbar terminal is formed by performing a pressing process on a metal plate such as a copper plate.

[0005] In this case, the busbar terminal may include a plurality of terminals directly connected to the coils. A part of each of the terminals may be bent due to a spatial limitation or a position of a connecting end of the coil.

[0006] In addition, the rotating shaft may be rotatably supported by a bearing in the housing. Here, the bearing may be disposed in the housing to be supported or may be press-fitted and installed in the busbar housing.

[0007] However, in the case of the above-described motor, since components have to be assembled through various assembly processes, there is a problem of increasing manufacturing costs.

[0008] In addition, since gaps are generated due to tolerances of the components, there is a problem of lowered reliability.

[0009] In addition, removing the busbar to decrease a size of the motor and meet performance is in demand according to user's requirements.

[0010] US 6 936 940 B2, DE 10 2016 204647 A1 and US 2011 / 309724 A1 are about motors.[Disclosure][Technical Problem]

[0011] The present invention is directed to providing a cover assembly in which a bearing is disposed and by which coils are guided to the outside, and a motor including the same.

[0012] In addition, the present invention is directed to providing a motor which has a simplified structure, a reduced size, and a simplified assembly process due to an insert-injection molded bearing in the cover assembly.

[0013] Objectives that should be solved according to the embodiments are not limited to the above described objectives, and other objectives which are not described above will be clearly understood by those skilled in the art from the following specification.[Technical Solution]

[0014] The invention is defined in the appended claims.

[0015] In the present description and drawings, any examples and technical descriptions of apparatuses, products and / or methods which are not covered by the claims should be taken as background art or examples useful for understanding the invention.[Advantageous Effects]

[0016] According to embodiments, since coils are guided by holes formed in a cover assembly, assemblability of a motor can be improved.

[0017] Here, arrangement positions of end portions of coils can be adjusted using grooves disposed in an upper portion of a cover assembly.

[0018] In addition, assemblability of holes can be improved using coil terminals configured to guide coils to be arranged. Here, since the coil terminals are disposed above insulators, a busbar, which is conventionally used, can be removed, and thus a size of a motor can be decreased.

[0019] Meanwhile, in the case of a motor in which coil terminals are formed in a router, since coils are individually wound around each of a stator and a router, winding and routing can be excellently performed. In addition, since an assembly process for the router is performed after the coils are wound, the coil terminals can be adjusted to be arranged in consideration of required positions.

[0020] In addition, since a bearing is insert-injection-molded in the cover assembly, a structure can be simplified, and a size can be decreased. Accordingly, since additional processes or members for sealing the bearing are not needed, productivity of a motor can be improved.

[0021] Accordingly, a size of the motor including the cover assembly can be decreased.

[0022] A variety of useful advantages and effects are not limited to the above-described contents and will be more easily understood when specific embodiments of the present invention are described.[Description of Drawings]

[0023] FIG. 1 is a perspective view illustrating a motor according to a first embodiment of the invention. FIG. 2 is a plan view illustrating the motor according to the first embodiment of the invention. FIG. 3 is a cross-sectional view illustrating the motor according to the first embodiment of the invention. FIG. 4 is a perspective view illustrating a cover assembly of the motor according to the first embodiment of the invention. FIG. 5 is a plan view illustrating the cover assembly of the motor according to the first embodiment of the invention. FIG. 6 is a cross-sectional view illustrating the cover assembly of the motor according to the first embodiment of the invention. FIG. 7 is a perspective view illustrating a motor according to a second embodiment, which is not part of the invention. FIG. 8 is an exploded perspective view illustrating the motor according to the second embodiment. FIG. 9 is a cross-sectional view taken along line B-B of FIG. 7 illustrating the motor according to the second embodiment. FIG. 10 is a view illustrating coupling of a stator core and an insulator which are disposed in the motor according to the second embodiment. FIG. 11 is a perspective view illustrating a first insulator of the motor according to the second embodiment. FIG. 12 is a plan view illustrating the first insulator of the motor according to the second embodiment. FIG. 13 is a perspective view illustrating a motor according to a third embodiment, which is not part of the invention. FIG. 14 is an exploded perspective view illustrating the motor according to the third embodiment. FIG. 15 is a cross-sectional view taken along line B 1-B 1 of FIG. 13 illustrating the motor according to the third embodiment. FIG. 16 is a view illustrating coupling of a stator and a router which are disposed in the motor according to the third embodiment. FIG. 17 is a perspective view illustrating the router of the motor according to the third embodiment. FIG. 18 is a plan view illustrating the router of the motor according to the third embodiment. [Modes of the Invention]

[0024] Since the invention allows for various changes and numerous embodiments, specific embodiments will be illustrated in the accompanying drawings and described in detail in the written description. It will be understood that, although the terms "first," "second," etc. may be used herein to describe various elements, these elements should not be limited to these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and a second element could similarly be termed a first element without departing from the scope of the present invention. As used herein, the term "and / or" includes combinations or any one of a plurality of associated listed items.

[0025] It will be understood that when an element Is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to another element or intervening elements may be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements.

[0026] In the description of embodiments, when an element is referred to as being "on or under" another element, the term "on or under" refers to either a direct connection between two elements or an indirect connection between two elements having one or more elements formed therebetween. In addition, when the term "on or under" is used, it may refer to a downward direction as well as an upward direction with respect to an element.

[0027] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting to the invention. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and / or "including," when used herein, specify the presence of stated features, integers, steps, operations, elements, components, and / or groups thereof but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0028] Unless otherwise defined, all terms including technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined here.

[0029] Hereinafter, example embodiments of the invention will be described below in more detail with reference to the accompanying drawings, components that are the same or correspond to each other are rendered with the same reference numeral regardless of the figure number, and redundant descriptions thereof will be omitted.

[0030] Coils may be disposed in holes formed in a cover assembly of a motor according to the embodiments. Accordingly, one end of the coil may be guided to the outside by the hole. Here, the hole may be formed to pass through the cover assembly.First Embodiment

[0031] FIG. 1 is a perspective view illustrating a motor according to a first embodiment, FIG. 2 is a plan view illustrating the motor according to the first embodiment, and FIG. 3 is a cross-sectional view illustrating the motor according to the first embodiment.

[0032] Referring to FIGS. 1 to 3, a motor 1 according to the first embodiment includes a cover assembly 100, a housing 200, a stator 300, coils 320, a rotor 400, and a rotating shaft 500 according to an embodiment. Here, the cover assembly 100 is be disposed to cover an open upper portion of the housing 200.

[0033] The cover assembly 100 and the housing 200 may form an exterior of the motor 1. Here, the housing 200 may be formed in a cylindrical shape having an opening formed in an upper portion thereof.

[0034] Accordingly, due to the cover assembly 100 and the housing 200 being coupled, an accommodation space may be formed therein. In addition, as illustrated in FIG. 2, the stator 300, the coils 320, the rotor 400, the rotating shaft 500, and the like are be disposed in the accommodation space.

[0035] The stator 300 may be supported by an inner circumferential surface of the housing 200. Here, the stator 300 is disposed outside the rotor 400.

[0036] The stator 300 may include a stator core and the coils 320 wound around the stator core to generate a rotating magnetic field. Here, the stator core may be formed as a single core or a plurality of separate cores which are coupled.

[0037] In addition, the stator core may be formed to have a form in which a plurality of plates having a thin steel plate shape is stacked on each other but is not necessarily limited thereto. For example, the stator core may also be formed as a single part.

[0038] A plurality of teeth may be formed to protrude from an outer circumferential surface of the stator core. The teeth may be disposed to protrude in a radial direction with respect to a center of the stator core. Here, the teeth may be disposed to face magnets. In addition, the coil 320 is wound around each of the teeth. Here, insulators (not shown) may be installed on the teeth. Accordingly, the insulators insulate the stator core from the coils 320.

[0039] Accordingly, when a current is supplied to the coil 320, an electrical interaction is induced between the coil 320 and the magnet so that the rotor 400 may rotate. In the case in which the rotor 400 rotates, the rotating shaft 500 also rotates with the rotor 400. Here, the rotating shaft 500 may be supported by a bearing 140.

[0040] The rotor 400 is be disposed inside the stator 300. In addition, the rotating shaft 500 may be coupled to a central portion of the rotor 400.

[0041] The rotor 400 may include a rotor core and the magnets. For example, the rotor 400 may be formed to have a form in which the magnets are disposed on an outer circumferential surface of the rotor core.

[0042] Here, the magnets and the coils 320 wound around the stator 300 generate a rotating magnetic field. In addition, the magnets may be disposed such that N and S poles thereof are alternately positioned in a circumferential direction about the rotating shaft 500.

[0043] Accordingly, the rotor 400 rotates due to an electrical interaction between the coils 320 and the magnets, and when the rotor 400 rotates, the rotating shaft 500 rotates to generate a driving force.

[0044] Meanwhile, the rotor core of the rotor 400 may be manufactured to have a form in which a plurality of separate cores is coupled or a single core is formed as a single cylinder.

[0045] As illustrated in FIG. 2, the rotating shaft 500 may be rotatably supported by the bearing 140 of the cover assembly 100 in the housing 200.

[0046] FIG. 4 is a perspective view illustrating a cover assembly of the motor according to the first embodiment, FIG. 5 is a plan view illustrating the cover assembly of the motor according to the first embodiment, and FIG. 6 is a cross-sectional view illustrating the cover assembly of the motor according to the first embodiment. Here, FIG. 6 is the cross-sectional view taken along line A-A of FIG. 5 illustrating the cover assembly.

[0047] Hereinafter, the cover assembly 100 according to the embodiment will be described with reference to FIGS. 4 to 6.

[0048] The cover assembly 100 may be disposed to cover an opening of the housing 200. The cover assembly 100 includes a cover body 110, a plurality of grooves 120, holes 130 which are formed in one sides of the grooves 120, and the bearing 140.

[0049] The cover body 110 may be formed to cover the opening of the housing 200. Here, the cover body 110 is be formed in a disc shape and may be formed of an insulating material. For example, the cover body 110 may be formed of a synthetic resin material such as mold.

[0050] In addition, an arrangement hole 112 may be formed at a center C of the cover body 110 such that the rotating shaft 500 is disposed therein.

[0051] The plurality of grooves 120 are formed in an upper surface 111 of the cover body 110.

[0052] The groove 120 may be formed in a groove shape having an opening. In addition, the coil 320 may be guided along the groove 120. In addition, the hole 130 is disposed in one side of the groove 120.

[0053] The groove 120 includes a first groove 120a, a second groove 120b, and a third groove 120c.

[0054] The first groove 120a includes a first curved portion 121 which is formed to have a predetermined curvature of 1 / R1 and a first extended portion 122 which extends from the first curved portion 121 in a radial direction with respect to the center C of the cover body 110.

[0055] In addition, the hole 130 is disposed in the first extended portion 122.

[0056] Accordingly, as illustrated in FIG. 3, one side of the coil 320 wound around the stator 300 may pass through the hole 130 disposed in the first extended portion 122 and may be disposed along the first extended portion 122. That is, the coil 320, which passes through the hole 130, is guided to be arranged by the first extended portion 122. Then, the coil 320 is guided to the other side of the first curved portion 121 by the first curved portion 121 disposed on one side of the first extended portion 122.

[0057] The second groove 120b includes a second curved portion 123 formed to have a predetermined curvature of 1 / R2, a second extended portion 124 which extends from one end portion of the second curved portion 123 in the radial direction with respect to the center C of the cover body 110, and a third extended portion 125 which extends from an outer side of the second curved portion 123 in the radial direction with respect to the center C of the cover body 110.

[0058] Here, the curvature of 1 / R2 of the second curved portion 123 may be greater than the curvature of 1 / R1 of the first curved portion 121. That is, on the basis of the center C, a radius R2 of the second curved portion 123 may be smaller than a radius R1 of the first curved portion 121.

[0059] Accordingly, as illustrated in FIG. 5, the second curved portion 123 may be disposed further inward than the first curved portion 121. Here, the term 'inward' may refer to a direction toward the center C in the radial direction. In addition, the term 'outward' may refer to a direction opposite to 'inward'.

[0060] The second extended portion 124 and the third extended portion 125 may be disposed to be spaced apart from each other by a predetermined distance d. In addition, the third extended portion 125 may be formed to extend from the second curved portion 123 in the same direction as the second extended portion 124.

[0061] In addition, the holes 130 are disposed in the second extended portion 124 and the third extended portion 125.

[0062] As illustrated in FIG. 3, one side of the coil 320 wound around the stator 300 passes through the hole 130 disposed in the second extended portion 124 and is guided by the second extended portion 124. Then, the coil 320 is guided to the other side of the second curved portion 123 by the second curved portion 123 disposed on one side of the second extended portion 124.

[0063] As illustrated in FIG. 3, one side of the coil 320 wound around the stator 300 passes through the hole 130 disposed in the third extended portion 125, and one side of the coil 320 is guided to be arranged along the third extended portion 125. Then, the coil 320 is guided to the other side of the second curved portion 123 by the second curved portion 123 disposed to extend from one side of the third extended portion 125.

[0064] Here, a guide protrusion (not shown) may be disposed on the second curved portion 123.

[0065] The guide protrusion may be formed to protrude upward from a lower surface 123a of the second curved portion 123. In addition, the guide protrusion may be disposed on a center of the second curved portion 123.

[0066] Accordingly, the coil 320 guided by the second extended portion 124 meets the coil 320 guided by the third extended portion 125 at one region of the second curved portion 123. In addition, the coil 320 guided by the second extended portion 124 and the coil 320 guided by the third extended portion 125 are separated by the guide protrusion and guided along the second curved portion 123.

[0067] As illustrated in FIG. 5, the third groove 120c may be formed in a 'v' shape. In addition, the holes 130 may be formed in one and the other sides of the third groove 120c.

[0068] As illustrated in FIG. 3, one side of the coil 320 wound around the stator 300 may pass through the hole 130 disposed in the third groove 120c and may be guided by the third groove 120c. That is, the coils 320 exposed to the outside through the holes 130 formed at one and the other sides of the third groove 120c may be guided to a bent region of a central portion of the third groove 120c by the third groove 120c.

[0069] The hole 130 is formed to pass through the cover body 110. Here, the hole 130 may be formed in the same direction as an axial direction of the rotating shaft 500. In addition, one region of the coil 320 may be disposed in the hole 130.

[0070] In addition, one side of the hole 130 is disposed in the groove 120.

[0071] Accordingly, the coil 320 wound around the stator 300 may be exposed outside the motor 1 through the hole 130. In addition, the exposed coil 320 may be guided by the groove 120.

[0072] The bearing 140 may rotatably support the rotating shaft 500. As illustrated in FIG. 2, the bearing 140 may be disposed on an outer circumferential surface of the rotating shaft 500.

[0073] Meanwhile, the bearing 140 may be disposed in the cover body 110. That is, the bearing 140 may be disposed in the cover body 110 by an insert injection method and may rotatably support the rotating shaft 500.

[0074] FIGS. 7 to 12 are views illustrating a motor 1a according to a second embodiment, which is not part of the invention, and FIGS. 13 to 18 are views illustrating a motor 1b according to a third embodiment, which is not part of the invention.

[0075] In the motor 1a or 1b according to the embodiment, coil terminals which guide end sides of coils to be arranged may be coupled to holes of a cover assembly to improve assemblability. In addition, in the motor 1a or 1b, since the coil terminals are assembled with the cover assembly by an insertion method, assembly tolerances may be minimized.Second Embodiment

[0076] FIG. 7 is a perspective view illustrating a motor according to a second embodiment, which is not claimed. FIG. 8 is an exploded perspective view illustrating the motor according to the second embodiment. FIG. 9 is a cross-sectional view taken along line B-B of FIG. 7 illustrating the motor according to the second embodiment. Here, an x direction refers to a radial direction and y direction refers to an axis direction in FIG. 9.

[0077] Referring to FIGS. 7 to 9, the motor 1a according to the second embodiment may include a cover assembly 100a, a housing 200, a stator 300, a rotor 400, and a rotating shaft 500. Here, the cover assembly 100a may be disposed to cover an open upper portion of the housing 200. In addition, the stator 300 may include a stator core 310, coils 320, and insulators 330. In addition, first coil terminals 340 may be formed on the insulators 330. Here, the coil terminals may refer to terminals.

[0078] The cover assembly 100a and the housing 200 may form an exterior of the motor 1a. Here, the housing 200 may be formed in a cylindrical shape having an opening formed in an upper portion thereof.

[0079] Accordingly, due to the cover assembly 100a and the housing 200 being coupled, an accommodation space may be formed therein. In addition, as illustrated in FIG. 9, the stator 300, the rotor 400, the rotating shaft 500, and the like may be disposed in the accommodation space.

[0080] The cover assembly 100a may be disposed to cover an opening 210 of the housing 200.

[0081] Referring to FIGS. 8 and 9, the cover assembly 100a may include a cover body 110, holes 130, and a bearing 140.

[0082] The cover body 110 may be disposed to cover the opening 210 of the housing 200. Here, the cover body 110 may be formed in a disc shape and formed of an insulating material. For example, the cover body 110 may be formed of a synthetic resin material such as mold.

[0083] In addition, an arrangement hole 112 may be formed at a center C of the cover body 110 such that the rotating shaft 500 is disposed therein. Here, the center C is a center of the motor 1a.

[0084] The holes 130 may be formed to pass through the cover body 110. As illustrated in FIG. 8, at least three holes 130 may be formed. In addition, the three holes 130 may be formed to be spaced apart from each other in a circumferential direction about the center C.

[0085] Here, the three holes 130 are exemplified as being disposed in the motor 1a, but the present invention is not necessarily limited thereto, and the number of holes 130 may be adjusted according to the number of phases of the motor.

[0086] The first coil terminal 340 may pass through an inside of the hole 130 and be coupled thereto. Here, the hole 130 guides the first coil terminal 340 of the stator 300 such that the first coil terminal 340 is disposed in the hole 130, and thus the first coil terminal 340 is disposed at a preset position.

[0087] The bearing 140 may rotatably support the rotating shaft 500. As illustrated in FIG. 9, the bearing 140 may be disposed on an outer circumferential surface of the rotating shaft 500.

[0088] Meanwhile, the bearing 140 may be disposed in the cover body 110. That is, the bearing 140 may be disposed in the cover body 110 by an insert injection method and may rotatably support the rotating shaft 500.

[0089] The stator 300 may be supported by an inner circumferential surface of the housing 200. In addition, the stator 300 is disposed outside the rotor 400. That is, the rotor 400 may be disposed inside the stator 300.

[0090] Referring to FIGS. 8 and 10, the stator 300 may include the stator core 310, the coils 320 wound around the stator core 310, and the insulators 330 interposed between the stator core 310 and the coils 320. Here, a wire having a coated outer circumferential surface may also be provided as the coil 320.

[0091] The coil 320 configured to generate a rotating magnetic field may be wound around the stator core 310. Here, the stator core 310 may be formed as a single core or a plurality of separate cores which are coupled.

[0092] The stator core 310 may be formed to have a form in which a plurality of plates having a thin steel plate shape is stacked on each other but is not necessarily limited thereto. For example, the stator core 310 may also be formed as a single part.

[0093] The stator core 310 may include a yoke 311 having a cylindrical shape and a plurality of teeth 312.

[0094] Here, the teeth 312 may be disposed to protrude in the radial direction (x direction) with respect to a center C of the stator core 310. In addition, the plurality of teeth 312 may be disposed to be spaced apart from each other in a circumferential direction of the yoke 311. Accordingly, slots may be formed between the teeth 312.

[0095] Meanwhile, the teeth 312 may be disposed to face magnets of the rotor 400. In addition, the coils 320 are wound around the teeth 312.

[0096] The insulators 330 insulate the stator core 310 from the coils 320. Accordingly, the insulators 330 may be interposed between the stator core 310 and the coils 320.

[0097] Accordingly, the coils 320 may be wound around the stator core 310 on which the insulators 330 are disposed.

[0098] As illustrated in FIG. 10, the insulators 330 may include a first insulator 331 disposed on an upper portion of the stator core 310 and a second insulator 332 disposed on a lower portion of the stator core 310.

[0099] The first coil terminal 340 may be formed to extend in an axial direction from an upper surface of the insulator 330. In addition, the first coil terminal 340 may guide one region of the coil 320.

[0100] For example, the first coil terminal 340 may be disposed on the first insulator 331. In addition, the first coil terminal 340 may be integrally formed with the first insulator 331.

[0101] The first coil terminal 340 may be coupled to the hole 130. As illustrated in FIG. 7, the first coil terminal 340 may be disposed to pass through and protrude from the hole 130 of the cover assembly 100a. Here, three first coil terminals 340 may be provided.

[0102] Referring to FIG. 11, the first coil terminals 340 may include coil terminal bodies 341 and fourth grooves 342.

[0103] The coil terminal body 341 may be disposed to protrude from an upper portion of the first insulator 331. In addition, the coil terminal body 341 may be integrally formed with the first insulator 331.

[0104] The fourth groove 342 may be concavely formed in the coil terminal body 341. In addition, the coil 320 may be disposed in the fourth groove 342. Here, the coil 320 may be disposed in the fourth groove 342 by an insert fitting method.

[0105] Accordingly, the fourth groove 342 may guide the coil 320 to be arranged. In addition, the concave fourth groove 342 may prevent movement of the coil 320.

[0106] As illustrated in FIG. 11, the fourth groove 342 may be long in a longitudinal direction of the coil terminal body 341.

[0107] For example, the fourth groove 342 may be long from a lower end to an upper end of the coil terminal body 341. Here, as illustrated in FIG. 7, an end portion of the coil 320 may be disposed to be exposed from the fourth groove 342.

[0108] Meanwhile, openings 342a of the fourth grooves 342 may be disposed to face an outside of the stator 300. That is, the opening of the fourth groove 342 may be disposed in a direction opposite to a direction (inward direction) toward the center C. Here, an inward direction refers to a direction toward the center C, and an outward direction refers to a direction opposite to the inward direction.

[0109] For example, as illustrated in FIG. 12, the fourth groove 342 may be disposed to be spaced apart from the center C of the stator 300 in the radial direction. In addition, the fourth grooves 342 may be radially disposed with respect to the center C of the stator 300.

[0110] Meanwhile, the fourth groove 342 may be disposed at a predetermined angle θ1 with respect to a line L which passes through the center C of the stator 300 in the radial direction. As illustrated in FIG. 12, the opening 342a of the fourth groove 342 may be disposed to have the predetermined angle θ1 with respect to the line L.

[0111] Accordingly, the coil 320 is wound around the first insulator 331 in a circumferential direction of the first insulator 331, and the coil 320 may be guided to be arranged by the fourth groove 342.

[0112] Meanwhile, when a current is supplied to the coil 320, an electrical interaction with the magnets is induced so that the rotor 400 may rotate. In the case in which the rotor 400 rotates, the rotating shaft 500 also rotates together therewith. Here, the rotating shaft 500 may be supported by the bearing 140.

[0113] The rotor 400 may be disposed inside the stator 300. In addition, the rotating shaft 500 may be coupled to a central portion of the rotor 400.

[0114] A rotor core may be coupled to the magnets to form the rotor 400. For example, the rotor 400 may be formed to have a form in which the magnets are disposed on an outer circumferential surface of the rotor core.

[0115] Accordingly, the magnets and the coils 320 wound around the stator 300 generate a rotating magnetic field. The magnets may be disposed such that N and S poles thereof are alternately positioned in a circumferential direction about the rotating shaft 500.

[0116] Accordingly, the rotor 400 rotates due to an electrical interaction between the coils 320 and the magnets, and when the rotor 400 rotates, the rotating shaft 500 rotates to generate a driving force of the motor 1a.

[0117] Meanwhile, the rotor core of the rotor 400 may be manufactured to have a form in which a plurality of separate cores is coupled or a single core is formed as a single cylinder.

[0118] As illustrated in FIG. 9, the rotating shaft 500 may be rotatably supported by the bearing 140 of the cover assembly 100a in the housing 200.Third Embodiment

[0119] FIG. 13 is a perspective view illustrating a motor according to a third embodiment, which is not claimed. FIG. 14 is an exploded perspective view illustrating the motor according to the third embodiment. FIG. 15 is a cross-sectional view taken along line B1-B1 of FIG. 13 illustrating the motor according to the third embodiment.

[0120] Hereinafter, when the motor 1b according to the third embodiment is described, since the same components as those of the motor 1a according to the second embodiment refer to the same symbols, detailed descriptions thereof will be omitted.

[0121] Referring to FIGS. 13 to 15, the motor 1b according to the third embodiment may include a cover assembly 100a, a housing 200, a stator 300, a rotor 400, a rotating shaft 500, and a router 600. Here, the cover assembly 100a may be disposed to cover an open upper portion of the housing 200. In addition, the router 600 may include a router body 610 and second coil terminals 620.

[0122] The cover assembly 100a and the housing 200 may form an exterior of the motor 1b. Here, the housing 200 may be formed in a cylindrical shape having an opening formed in an upper portion thereof.

[0123] Accordingly, due to the cover assembly 100a and the housing 200 being coupled, an accommodation space may be formed therein. In addition, as illustrated in FIG. 15, the stator 300, the rotor 400, the rotating shaft 500, the router 600, and the like may be disposed in the accommodation space.

[0124] The cover assembly 100a may be disposed to cover an opening 210 of the housing 200.

[0125] Referring to FIGS. 14 and 15, the cover assembly 100a may include a cover body 110, holes 130, and a bearing 140.

[0126] The cover body 110 may be disposed to cover the opening 210 of the housing 200. Here, the cover body 110 may be formed in a disc shape and formed of an insulating material. For example, the cover body 110 may be formed of a synthetic resin material such as mold.

[0127] In addition, an arrangement hole 112 may be formed at a center C of the cover body 110 such that the rotating shaft 500 is disposed therein. Here, the center C is a center of the motor 1b.

[0128] The holes 130 may be formed to pass through the cover body 110. As illustrated in FIG. 14, at least three holes 130 may be formed. In addition, the three holes 130 may be formed to be spaced apart from each other in a circumferential direction about the center C.

[0129] Here, the three holes 130 are exemplified as being disposed in the motor 1b, but the present invention is not necessarily limited thereto, and the number of holes 130 may be adjusted according to the number of phases of the motor.

[0130] The second coil terminal 620 may pass through an inside of the hole 130 and be coupled thereto. Here, the hole 130 guides the second coil terminal 620 such that the second coil terminal 620 is disposed at a preset position.

[0131] The bearing 140 may rotatably support the rotating shaft 500. As illustrated in FIG. 15, the bearing 140 may be disposed on an outer circumferential surface of the rotating shaft 500.

[0132] Meanwhile, the bearing 140 may be disposed in the cover body 110. That is, the bearing 140 may be disposed in the cover body 110 by an insert injection method and may rotatably support the rotating shaft 500.

[0133] The stator 300 may be supported by an inner circumferential surface of the housing 200. In addition, the stator 300 is disposed outside the rotor 400. That is, the rotor 400 may be disposed inside the stator 300.

[0134] Referring to FIG. 14, the stator 300 may include a stator core 310, coils 320 wound around the stator core 310, and insulators 330 interposed between the stator core 310 and the coils 320. Here, a wire having a coated outer circumferential surface may also be provided as the coil 320.

[0135] The coil 320 configured to generate a rotating magnetic field may be wound around the stator core 310. Here, the stator core 310 may be formed as a single core or a plurality of separate cores which are coupled.

[0136] The stator core 310 may be formed to have a form in which a plurality of plates having a thin steel plate shape is stacked on each other but is not necessarily limited thereto. For example, the stator core 310 may also be formed as a single part.

[0137] The stator core 310 may include a yoke 311 having a cylindrical shape and a plurality of teeth 312.

[0138] Here, the teeth 312 may be disposed to protrude in a radial direction with respect to a center C of the stator core 310. In addition, the plurality of teeth 312 may be disposed to be spaced apart from each other in a circumferential direction of the yoke 311. Accordingly, slots may be formed between the teeth 312.

[0139] Meanwhile, the teeth 312 may be disposed to face magnets of the rotor 400. In addition, the coils 320 are wound around the teeth 312.

[0140] The insulators 330 insulate the stator core 310 from the coils 320. Accordingly, the insulators 330 may be interposed between the stator core 310 and the coil 320.

[0141] Referring to FIG. 10, the insulators 330 may include a first insulator 331 disposed on an upper portion of the stator core 310 and a second insulator 332 disposed on a lower portion of the stator core 310. Here, each of the first insulator 331 and the second insulator 332 may include a plurality of insulator members or a single insulator member.

[0142] The insulators 330 according to the embodiment is exemplified to include the first insulator 331 and the second insulator 332 which are respectively coupled to the upper portion and the lower portion of the stator core 310 but are not necessarily limited thereto. For example, the insulators 330 may also be disposed on the stator core 310 by an insert injection method.

[0143] Accordingly, the coils 320 may be wound around the stator core 310 on which the insulators 330 are disposed.

[0144] Here, as illustrated in FIG. 16, the coil 320 may be wound around a side of the tooth 312 and wound around an outer circumferential surface 333 of the first insulator 331. That is, the coil 320 may be wound around the side of the tooth 312 and wound in a circumferential direction of the first insulator 331.

[0145] Meanwhile, when a current is supplied to the coil 320, an electrical interaction with the magnet is induced so that the rotor 400 may rotate. In the case in which the rotor 400 rotates, the rotating shaft 500 also rotates together therewith. Here, the rotating shaft 500 may be supported by the bearing 140.

[0146] The rotor 400 may be disposed inside the stator 300. In addition, the rotating shaft 500 may be coupled to a central portion of the rotor 400.

[0147] A rotor core may be coupled to the magnets to form the rotor 400. For example, the rotor 400 may be formed to have a form in which the magnets are disposed on the outer circumferential surface of the rotor core.

[0148] Accordingly, the magnets and the coils 320 wound around the stator 300 generate a rotating magnetic field. The magnets may be disposed such that N and S poles thereof are alternately positioned in a circumferential direction about the rotating shaft 500.

[0149] Accordingly, the rotor 400 rotates due to an electrical interaction between the coils 320 and the magnets, and when the rotor 400 rotates, the rotating shaft 500 rotates to generate a driving force of the motor 1b.

[0150] Meanwhile, the rotor core of the rotor 400 may be manufactured to have a form in which a plurality of separate cores is coupled or a single core is formed as a single cylinder.

[0151] As illustrated in FIG. 15, the rotating shaft 500 may be rotatably supported by the bearing 140 of the cover assembly 100a in the housing 200.

[0152] The router 600 may be disposed on the stator 300. As illustrated in FIG. 16, the router 600 guides the coil 320 of the stator 300 such that the coil 320 may be disposed at a predetermined position.

[0153] FIG. 17 is a perspective view illustrating the router of the motor according to the third embodiment, and FIG. 18 is a plan view illustrating the router of the motor according to the third embodiment.

[0154] Referring to FIGS. 17 and 18, the router 600 may include the router body 610 and the second coil terminals 620.

[0155] The router body 610 may be formed in a disc shape. In addition, the router body 610 may be formed of a synthetic resin material.

[0156] A sixth groove 630 and a seventh groove 640 may be formed in an upper surface 611 of the router body 610. In addition, each of the sixth groove 630 and the seventh groove 640 may be formed in a groove shape having an opening which is formed upward.

[0157] Accordingly, as illustrated in FIG. 16, any one of the coils 320 of the stator 300 may be guided to be arranged by the sixth groove 630 or the seventh groove 640 and may be guided by the second coil terminal 620.

[0158] The sixth groove 630 and the seventh groove 640 may be formed in the circumferential direction about the center C. Here, curvatures of 1 / R3 and 1 / R4 of the sixth groove 630 and the seventh groove 640 may be different. That is, radii of R3 and R4 of the sixth groove 630 and the seventh groove 640 may be different. Accordingly, the coils 320 which are guided to be arranged by the sixth groove 630 and the seventh groove 640 may be disposed such that the coils 320 do not intersect.

[0159] Meanwhile, a first protrusion 650 may be further interposed between the sixth groove 630 and the seventh groove 640. Here, as illustrated in FIG. 17, the first protrusion 650 may be formed to protrude in the circumferential direction about the center C. Accordingly, the first protrusion 650 may prevent interference between the coils 320 disposed along the sixth groove 630 and the seventh groove 640.

[0160] In addition, cut portions 660 in which some regions are cut may further be formed in the router body 610. The cut portions 660 may be formed from an outer side of router body 610 in a radial direction. Accordingly, the plurality of coils 320 may be guided to be arranged by the sixth groove 630 or the seventh groove 640 through the cut portions 660 while the plurality of coils 320 is not interfered therewith.

[0161] Meanwhile, the second coil terminal 620 may be formed to protrude from the upper surface 611 of the router body 610 in an axial direction. Here, the second coil terminal 620 may be disposed further outward than the seventh groove 640. In addition, the second coil terminal 620 may guide one region of the coil 320.

[0162] The second coil terminals 620 may be integrally formed with the router body 610. The second coil terminals 620 may be coupled to the holes 130. As illustrated in FIG. 15, the second coil terminals 620 may be disposed to pass through and protrude from the holes 130 of the cover assembly 100a. Here, three second coil terminals 620 may be provided.

[0163] Referring to FIG. 17, the second coil terminals 620 may include coil terminal bodies 621, fifth grooves 622, and second protrusions 623.

[0164] The coil terminal bodies 621 may be disposed to protrude from an upper portion of the router body 610. In addition, the coil terminal bodies 621 may be integrally formed with the router body 610.

[0165] The fifth groove 622 may be concavely formed in the coil terminal body 621. In addition, the coil 320 may be formed in the fifth groove 622. Here, the coil 320 may be disposed in the fifth groove 622 by an insert fitting method.

[0166] Accordingly, the fifth groove 622 may guide the coil 320 to be arranged. In addition, the concave fifth groove 622 may prevent movement of the coil 320.

[0167] As illustrated in FIG. 17, the fifth groove 622 may be long in a longitudinal direction of the coil terminal body 621.

[0168] For example, the fifth groove 622 may be long from a lower end to an upper end of the coil terminal body 621. Here, as illustrated in FIG. 16, an end portion of the coil 320 may be disposed to be exposed from the fifth groove 622.

[0169] Meanwhile, an opening 622a of the fifth groove 622 may be disposed to face an inner side of the router 600. That is, the opening 622a of the fifth groove 622 may be disposed in an inward direction toward the center C.

[0170] As illustrated in FIG. 18, the fifth grooves 622 may be disposed to be spaced apart from a center C of the router 600 in a radial direction. In addition, the fifth grooves 622 may be radially disposed with respect to the center C of the router 600.

[0171] Meanwhile, the fifth groove 622 may be disposed to have a predetermined angle θ2 with respect to a line L which passes through the center C of the router 600. As illustrated in FIG. 18, the opening 622a of the fifth groove 622 may be disposed to have the angle θ2 having a predetermined slope with respect to the line L.

[0172] Accordingly, the coil 320 is disposed along the sixth groove 630 or the seventh groove 640, and the coil 320 may be guided to be arranged by the fifth groove 622.

[0173] The second protrusion 623 may be formed from one side of the fifth groove 622. As illustrated in FIG. 17, the second protrusion 623 may be formed to protrude from a side of the opening 622a of the fifth groove 622. Here, the second protrusion 623 may be disposed on an upper portion of the coil terminal body 621.

[0174] Accordingly, the second protrusion 623 may prevent departure of the coil 320 disposed in the fifth groove 622.

[0175] Although the present invention has been described with reference to the embodiments thereof, it will be understood by those skilled in the art that the invention may be variously changed and modified within the scope of the invention which is defined by the appended claims.[Reference Numerals]

[0176] 1, 1a, 1b:MOTOR100, 100a:COVER ASSEMBLY110:COVER BODY120:GROOVE120a:FIRST GROOVE120b:SECOND GROOVE120c:THIRD GROOVE130:HOLE140:BEARING200:HOUSING300:STATOR320:COIL330:INSULATOR340, 620:COIL TERMINAL342:FOURTH GROOVE622:FIFTH GROOVE630:SIXTH GROOVE640:SEVENTH GROOVE650:FIRST PROTRUSION

Claims

1. A cover assembly for covering an open upper portion of a housing of a motor, the cover assembly comprising: a cover body (110) having a disc shape, the disc shape having a center (C); and a plurality of grooves (120) formed in an upper surface of the cover body (110) to guide a coil (320), wherein a hole (130) is formed in one side of each of the grooves (120) and passes through the cover body (110), so that one side of the coil may pass through the hole (130) and be is guided by the groove, characterized in that the plurality of grooves (120) includes: a first groove (120a) comprising a first curved portion (121) shaped as a circular arc having a first radius (R1) with respect to the center (C) of the disc shape, and a first extended portion (122) which extends radially from the first curved portion (121) away from the center (C) of the disc shape, wherein the respective hole (130) is disposed in the first extended portion (122); and a second groove (120b) comprising a second curved portion (123) shaped as a circular arc having a second radius (R2) with respect to the center (C) of the disc shape, and second and third extended portions (124, 125) which both extend radially from the second curved portion away from the center (C), wherein the respective hole (130) is respectively disposed in the second extended portion (124) and in the third extended portion (125).

2. The cover assembly of claim 1, wherein the second radius (R2) is smaller than the first radius (R1).

3. The cover assembly of claim 1, wherein the plurality of grooves (120) further includes a third groove (120c) formed in a 'v' shape with a bent region at a central portion thereof, and wherein the plurality of holes (130) further includes holes respectively disposed in the third groove at both ends of the 'v' shape.

4. A motor comprising: a rotating shaft (500); a rotor (400) coupled to the rotating shaft (500); a stator (300) disposed outside the rotor (400); coils (320) wound around the stator (300); a housing (200) which accommodates the rotor (400) and the stator (300) and in which an opening (210) is formed at one side thereof; and a cover assembly (100) according to any one of the preceding claims, which covers the opening (210), wherein the cover body (110) of the cover assembly (100) covers the opening (210), and wherein each individual coil (320) has a region disposed in a respective hole (130).

5. The motor of claim 4, wherein one of the coils (320) passes through the hole (130) disposed in the first extended portion (122) and is guided by the first curved portion (121) to an end of the first groove (120a).

6. The motor of claim 4, wherein: a bearing (140) is further disposed in the cover body (110) by an insert injection method; and the bearing (140) is disposed on an outer circumferential surface of the rotating shaft (500).