Motor

Abstract

In one embodiment, a motor includes a housing, a cover disposed on the housing, a stator disposed inside the housing, a rotor disposed inside the stator, a shaft coupled to the rotor, and a connector disposed on the cover, the connector including a connector body and a shield terminal disposed with a portion exposed from the connector body, the cover being made of a metal material, and the shield terminal being inserted into a hole in the cover so as to contact the hole. Accordingly, the motor can improve grounding force by utilizing the curved shield terminal and the hole formed in the cover.

Description

[Technical field]

[0001] The embodiment relates to a motor. [Background technology]

[0002] Motors are devices that convert electrical energy into mechanical energy to obtain rotational force, and are used in a wide range of applications, including vehicles, household appliances, and industrial equipment.

[0003] In particular, the motor may be applied to an active roll stabilizer (ARS). Here, the ARS may refer to a device that increases the safety and riding comfort of a vehicle by varying a stabilizer bar. Specifically, when the vehicle turns, the ARS may be a device that improves the turning safety of the vehicle by adjusting the degree of torsion of the stabilizer bar.

[0004] The motor may include a housing, a shaft, a stator disposed on an inner circumferential surface of the housing, a rotor installed on an outer circumferential surface of the shaft, and a busbar disposed on an upper portion of the stator, etc. Here, the stator induces electrical interaction with the rotor to induce rotation of the rotor.

[0005] Here, the motor may implement grounding using a wire connected to a bolting area. However, if a separate wire is used, there is a risk of disconnection and interference between the wire and other parts of the motor. Therefore, the motor may include a shield terminal to implement grounding. Here, the shield terminal may be a ground terminal provided to reduce noise from sensing when sensing is performed for electronic control.

[0006] At this time, the shield terminal may be made of a material with low resistance such as gold, silver, copper, etc. However, since gold, silver, copper, etc. are materials having flexibility, a separate fixing method or structure is required.

[0007] Therefore, when structurally or mechanically implementing the shield terminal of the motor, a grounding structure is required that takes into consideration the fact that the shield terminal is made of a soft material and the contactability of the shield terminal. Summary of the Invention [Problem to be solved by the invention]

[0008] The embodiments provide a motor that includes a shield terminal for improved grounding.

[0009] The problems that the embodiments aim to solve are not limited to those mentioned above, and other problems not mentioned here will be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0010] The object is achieved by a motor including a housing, a cover disposed on an upper portion of the housing, a stator disposed inside the housing, a rotor disposed inside the stator, a shaft coupled to the rotor, and a connector disposed on an upper portion of the cover, the connector including a connector body and a shield terminal disposed such that a portion of the connector body is exposed, the cover is made of a metal material, and the shield terminal is inserted so as to contact a hole in the cover.

[0011] Here, the shield terminal may include a first region, a second region extending in an axial direction from an end of the first region, a third region extending to have a curved surface at an end of the second region, and a fourth region extending from an end of the third region, the curved surface being disposed to contact an inner circumferential surface of the hole, and when the curved surface is in contact with the inner circumferential surface of the hole, the fourth region may be in contact with a corner on a lower side of the hole.

[0012] In addition, before the cover and the connector are coupled to each other, the fourth region may be disposed to be spaced apart from the second region in the axial direction.

[0013] Furthermore, before the cover and the connector are coupled to each other, the fourth region can be disposed on an imaginary line L that crosses the second region in the axial direction.

[0014] In addition, the hole may be formed to have a circular horizontal cross section, and the shield terminal may be formed by bending a plate-like member. Here, the hole may be formed in a tapered shape. In this case, the inner peripheral surface of the tapered hole is in sliding contact with the curved surface, so that deformation of the shield terminal can be more easily induced.

[0015] In addition, the cover includes a cover body, a first cover protrusion extending from an outer periphery of the cover body to protrude upward in the axial direction, a second cover protrusion extending from the cover body to protrude downward in the axial direction, and a hole formed to penetrate the cover body in the axial direction, and a bearing may be disposed inside the second cover protrusion.

[0016] Meanwhile, the connector may further include a busbar disposed on an upper portion of the stator, the busbar including a busbar body and a plurality of busbar terminals disposed on the busbar body, and an end of the busbar terminal disposed to penetrate the cover may be electrically connected to a power terminal of the connector. Effect of the Invention

[0017] The embodiment can improve the grounding force by using the shield terminal including the curved surface and the hole formed in the cover.

[0018] In addition, the embodiment may implement two-point contact by inducing deformation of the shield terminal using the coupling force between the cover and the connector, thereby further improving the grounding ability of the shield terminal.

[0019] Various beneficial advantages and effects of the embodiments are not limited to the above, but will be more easily understood in the course of describing specific embodiments of the embodiments. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a perspective view showing a motor according to an embodiment. [Diagram 2] 1 is a cross-sectional perspective view showing a motor according to an embodiment of the present invention; [Diagram 3] 1 is a cross-sectional view showing a motor according to an embodiment of the present invention. [Figure 4] 4 is a diagram showing a cover disposed on a motor according to an embodiment. [Diagram 5] FIG. 2 is an exploded perspective view showing the positional relationship between a cover and a connector disposed in the motor according to the embodiment. [Figure 6] 1 is a view showing a state before a cover and a connector disposed in a motor according to an embodiment are joined together; [Figure 7] 13 is a view showing a state after a cover and a connector arranged on a motor according to an embodiment are coupled to each other; [Figure 8a] This is a diagram showing the arrangement and structure of a cover and connector arranged in a motor according to an embodiment, and also shows the structure of the shield terminal before the cover and connector are coupled and the arrangement relationship with the holes when the shield terminal of the connector is made of a soft material. [Figure 8b]FIG. 13 is a diagram showing the arrangement and structure of a cover and a connector disposed in a motor according to an embodiment, and shows the structure of a shield terminal before the cover and the connector are coupled and the arrangement relationship with holes when the shield terminal is made of an elastic material. [Figure 9] 13 is a diagram showing a modified example of a hole formed in a cover disposed in a motor according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0022] However, the technical concept of the present invention is not limited to the described embodiments, but may be embodied in various different forms, and one or more of the components of the embodiments may be selectively combined or substituted within the scope of the technical concept of the present invention.

[0023] Furthermore, terms (including technical and scientific terms) used in the embodiments of the present invention may be interpreted in a manner that is commonly understood by a person having ordinary skill in the art to which the present invention belongs, unless otherwise clearly defined and described, and commonly used terms, such as terms defined in a dictionary, may be interpreted in light of the contextual meaning of the relevant art.

[0024] Furthermore, the terms used in the embodiments of the present invention are intended to describe the embodiments and are not intended to limit the present invention.

[0025] In this specification, the singular can include the plural unless otherwise specified in the context, and when it is stated that "A and (and) at least one (or more) of B and C" it can include one or more of all possible combinations of A, B, and C.

[0026] Additionally, terms such as first, second, A, B, (a), (b), etc. may be used to describe components of embodiments of the present invention.

[0027] Such terms are merely used to distinguish a component from other components, and are not intended to limit the nature, order, or sequence of the components.

[0028] Furthermore, when a component is described as being "coupled," "coupled," or "connected" to another component, it includes not only cases where the component is directly coupled, coupled, or connected to the other component, but also cases where the component is "coupled," "coupled," or "connected" by yet another component between the component and the other component.

[0029] In addition, when described as being formed or disposed "above or below" each component, "above" or "below" includes not only the case where two components are in direct contact with each other, but also the case where one or more other components are formed or disposed between the two components. In addition, when described as "above or below," it can include not only the upper direction but also the lower direction based on one component.

[0030] Fig. 1 is a perspective view showing a motor according to an embodiment, Fig. 2 is a cross-sectional perspective view showing a motor according to an embodiment, and Fig. 3 is a cross-sectional view showing a motor according to an embodiment. In Figs. 1 to 3, the x direction may refer to the axial direction, and the y direction may refer to the radial direction. The axial direction and the radial direction may be perpendicular to each other. Here, the axial direction may be the length direction of shaft 500.

[0031] 1 to 3, the motor 1 according to the embodiment may include a housing 100 having an opening on one side, a cover 200 disposed on the upper part of the housing 100, a stator 300 disposed inside the housing 100, a rotor 400 disposed inside the stator 300, a shaft 500 rotating together with the rotor 400, a bus bar 600 disposed on the upper side of the stator 300, and a connector 700 disposed on the upper part of the cover. Here, the inside may refer to a direction toward the center C based on the center C, and the outside may refer to a direction opposite to the inside.

[0032] The motor 1 may be a motor used in an ARS.

[0033] The housing 100 and the cover 200 may form the outer shape of the motor 1. An accommodating space may be formed by combining the housing 100 and the cover 200. As a result, a stator 300, a rotor 400, a shaft 500, etc. may be disposed in the accommodating space as shown in Fig. 1. At this time, the shaft 500 is rotatably disposed in the accommodating space. Therefore, the motor 1 may further include bearings 10 disposed on the upper and lower parts of the shaft 500.

[0034] The housing 100 may be formed in a cylindrical shape. The housing 100 may accommodate the stator 300, the rotor 400, etc. inside. At this time, the shape and material of the housing 100 may be variously modified. For example, the housing 100 may be formed of a metal material that can withstand high temperatures.

[0035] The cover 200 may be disposed on an opening surface of the housing 100, i.e., on the upper portion of the housing 100, to cover the opening of the housing 100. Here, the cover 200 may be made of a metal material.

[0036] FIG. 4 is a diagram showing a cover disposed on the motor according to the embodiment.

[0037] 4, the cover 200 may include a cover body 210, a first cover protrusion 220, a second cover protrusion 230, and a hole 240 formed for grounding. Here, the cover body 210, the first cover protrusion 220, and the second cover protrusion 230 may be integrally formed.

[0038] The cover body 210 may act as a lid for covering the opening of the housing 100. Thus, the cover body 210 may be disposed on the opening surface of the housing 100, i.e., on the upper portion of the housing 100.

[0039] The first cover protrusion 220 may be formed to protrude upward in one of the axial directions from the outer periphery or edge of the cover body 210. Thus, the first cover protrusion 220 may guide the placement of the connector 700. Here, the first cover protrusion 220 may be referred to as a wall body.

[0040] The second cover protrusion 230 may be formed to protrude downward from the center of the cover body 210 to the other side in the axial direction. Thus, the bearing 10 may be disposed inside the second cover protrusion 230. Here, the second cover protrusion 230 may be called a bearing receiving portion or a cover pocket. The second cover protrusion 230 may include a hole formed in the center for disposing the shaft 500 therein.

[0041] The hole 240 may be formed in the cover body 210 to penetrate in the axial direction, and one side of the shield terminal 730 may be disposed to contact an inner circumferential surface 241 of the hole 240.

[0042] The stator 300 may be disposed inside the housing 100. In this case, the stator 300 may be supported on an inner circumferential surface of the housing 100. The stator 300 may be disposed outside the rotor 400. That is, the rotor 400 may be rotatably disposed inside the stator 300.

[0043] Referring to FIG. 2 , the stator 300 may include a stator core 310 , a coil 320 wound around the stator core 310 , and an insulator 330 disposed between the stator core 310 and the coil 320 .

[0044] A coil 320 for generating a rotating magnetic field may be wound around the stator core 310. Here, the stator core 310 may be formed of a single core or a plurality of divided cores combined together.

[0045] In addition, the stator core 310 may be formed by stacking a plurality of thin steel plates, but is not limited thereto. For example, the stator core 310 may be formed as a single piece.

[0046] The stator core 310 may include a cylindrical yoke (not shown) and a plurality of teeth (not shown) protruding in a radial direction from the yoke, and a coil 320 may be wound around the teeth.

[0047] The insulator 330 insulates the stator core 310 from the coil 320. Thereby, the insulator 330 can be disposed between the stator core 310 and the coil 320.

[0048] Therefore, the coil 320 can be wound around the teeth of the stator core 310 on which the insulator 330 is disposed.

[0049] The rotor 400 may be disposed inside the stator 300. And, a shaft 500 may be coupled to the central portion.

[0050] The rotor 400 may be configured by combining the magnet 420 with the rotor core 410. For example, the rotor 400 may be configured in such a way that the magnet 420 is disposed on the outer circumferential surface of the rotor core 410.

[0051] Therefore, the magnet 420 can form a rotating magnetic field together with the coil 320 wound around the stator 300. The magnets 420 can be arranged such that the north poles and south poles are alternately positioned in the circumferential direction around the shaft 500.

[0052] As a result, the rotor 400 rotates due to electrical interaction between the coil 320 and the magnet 420, and when the rotor 400 rotates, the shaft 500 rotates, thereby generating a driving force for the motor 1.

[0053] Meanwhile, the rotor core 410 of the rotor 400 may be manufactured by combining a plurality of divided cores or may be manufactured in the form of a single core consisting of one cylinder. Here, the rotor core 410 may be implemented in the form of a plurality of stacked plates in the form of circular thin steel sheets.

[0054] 1 and 2, the shaft 500 can be rotatably supported inside the housing 100 by the bearings 10. The shaft 500 can rotate together with the rotor 400 in conjunction with the rotation of the rotor 400.

[0055] The busbar 600 may be disposed on top of the stator 300 .

[0056] And, the bus bar 600 may be electrically connected to the coil 320 of the stator 300 .

[0057] The busbar 600 may include a busbar body 610 and a plurality of busbar terminals 620 disposed on the busbar body 610 .

[0058] The bus bar body 610 may be a molded product formed by injection molding an insulating material, and may be formed in a ring shape.

[0059] The busbar terminal 620 may be disposed on the busbar body 610 through injection molding. At this time, the busbar terminal 620 may be formed to be partially exposed from the busbar body 610.

[0060] In addition, one side of the bus bar terminal 620 may be electrically connected to the coil 320 of the stator 300. The other side of the bus bar terminal 620 may be formed to protrude upward and penetrate the cover 200. As a result, the other side of the bus bar terminal 620 may be connected to a power terminal 720 of the connector 700 through fusing.

[0061] The connector 700 is disposed on the top of the cover 200 and may be coupled to the cover 200 through a coupling member such as a bolt. That is, the motor 1 has an advantage in that a grounding configuration between the shield terminal 730 and the hole 240 of the cover 200 is naturally realized in the process of assembling the connector 700 to the cover 200.

[0062] FIG. 5 is an exploded perspective view showing the positional relationship between the cover and connector placed on the motor of the embodiment, FIG. 6 is a drawing showing the cover and connector placed on the motor of the embodiment before they are joined, and FIG. 7 is a drawing showing the cover and connector placed on the motor of the embodiment after they are joined.

[0063] 2, 3, and 5 to 7, a connector 700 may be disposed on the cover 200. The connector 700 may include a connector body 710, and a plurality of power terminals 720 and a shield terminal 730 disposed on the connector body 710. Here, the shield terminal 730 may be called a ground terminal.

[0064] Therefore, the connector 700 can transmit power applied from the outside to the coil 320 using the power terminal 720 .

[0065] The connector body 710 may be a molded product made of an insulating material, and may act as a frame for assembling the power terminal 720 and the shield terminal 730 as one component.

[0066] The connector body 710 may include a body portion 711 and a connector portion 712 .

[0067] The body portion 711 may be disposed on the top of the cover 200 .

[0068] The connector part 712 may be formed to protrude in an axial direction from the body part 711. An external power source may be connected to the connector part 712.

[0069] The power terminal 720 and the shield terminal 730 may be disposed in the connector body 710 through injection molding. At this time, the power terminal 720 and the shield terminal 730 may be disposed so that a portion of each of them is exposed from the connector body 710.

[0070] The power terminal 720 transmits power applied from an external source to the bus bar 600. Here, the power terminal 720 may be made of a metal material.

[0071] One end of the power terminal 720 may be disposed to face or contact the other end of the bus bar terminal 620, and may be electrically coupled to the bus bar terminal 620 through fusing or the like.

[0072] At least three power supply terminals 720 may be formed, and each of the power supply terminals 720 may be connected to a bus bar terminal 620 of a U, V, or W phase.

[0073] The shield terminal 730 may be disposed to contact the cover 200 to implement grounding. As shown in Fig. 7, an end of the shield terminal 730 exposed from the connector body 710 may be disposed to contact the inner peripheral surface 241 of the hole 240 to implement grounding.

[0074] 6 and 7, the shield terminal 730 may include a first region 731 disposed in a radial direction and a portion of which is disposed in the connector body 710, a second region 732 extending in an axial direction from an end of the first region 731, a third region 733 extending from an end of the second region 732 to have a curved surface 733a, and a fourth region 734 extending in an axial direction from an end of the third region 733. At this time, the position of the fourth region 734 may be changed by a reaction force generated when the curved surface 733a contacts an inner circumferential surface 241 of the hole 240. Thus, the fourth region 734 may contact a corner 242 on a lower side of the hole 240. Here, the curved surface 733a may be formed to have a predetermined curvature.

[0075] 7, a reaction force formed by the contact between the inner circumferential surface 241 of the hole 240 and the curved surface 733a causes one area of ​​the third region 733 to warp, and the position of the fourth region 734 may be changed to be inclined. As a result, the shield terminal 730 may implement a two-point contact structure through the fourth region 734 contacting the lower corner 242 of the hole 240 in addition to the third region 733 contacting the inner circumferential surface 241 of the hole 240. In particular, since the curved surface 733a may be formed to have a predetermined curvature, the curved surface 733a of the shield terminal 730 moves downward while contacting the upper corner of the inner circumferential surface 241. As a result, the shield terminal 730 is bent toward the inside of the hole 240. In addition to the third region 733 contacting the inner surface 241 of the hole 240, the shield terminal 730 may have a two-point contact structure through a fourth region 734 contacting a lower corner 242 of the hole 240.

[0076] That is, during an assembly process of the connector 700 and the cover 200, a portion of the curved surface 733a of the third region 733 may be disposed to overlap the hole 240 with respect to the axial direction. Then, when the fourth region 734 is guided by the hole 240, a portion of the curved surface 733a of the third region 733 may be disposed to overlap the hole 240, so that the curved surface 733a may come into contact with an inner peripheral surface 241 of the hole 240. Then, one region of the third region 733 may be warped by a reaction force caused by the contact between the curved surface 733a and the inner peripheral surface 241 of the hole 240, so that one side of the fourth region 734 may come into contact with a corner 242 on a lower side of the hole 240.

[0077] Therefore, when the end of the shield terminal 730 is inserted into the hole 240 through the combination of the cover 200 and the connector 700, the shield terminal 730 realizes a two-point contact structure realized through the reaction force, thereby improving the grounding force of the shield terminal 730. For example, the shield terminal 730 realizes a two-point contact structure through the contact between the curved surface 733a and the inner peripheral surface 241 of the hole 240 and the contact between the fourth region 734 and the corner 242 on the lower side of the hole 240, thereby improving the grounding force of the shield terminal 730.

[0078] Meanwhile, the hole 240 may be formed to have a circular horizontal cross section. And, the shield terminal 730 may be formed by bending a plate-like member. Thus, a corner on a circumferential side of the third region 733 may contact an inner peripheral surface 241 of the hole 240 on at least one side. Also, a corner on a circumferential side of the fourth region 734 may contact a corner 242 disposed at a lower portion of the hole 240 on at least one side.

[0079] That is, the hole 240 is formed in a circular shape, and the shield terminal 730 is formed by bending a plate-like member, so that the hole 240 and the shield terminal 730 can contact each other at a maximum of four points.

[0080] Also, the shield terminal 730 may be made of an elastic material or a soft material, etc. For example, in order to reduce noise interfering with the sensing, the shield terminal 730 may be made of a low-resistance material such as gold, silver, copper, etc. Therefore, the structure of the shield terminal 730 may be embodied in various shapes depending on the material, thereby optimizing the grounding structure.

[0081] Fig. 8 is a diagram showing the structure of a connector disposed in a motor according to an embodiment. Fig. 8a is a diagram showing the structure of shield terminal 730 and the arrangement of holes 240 before cover 200 and connector 700 are coupled when shield terminal 730 is made of a flexible material, and Fig. 8b is a diagram showing the structure of shield terminal 730 and the arrangement of holes 240 before cover 200 and connector 700 are coupled when shield terminal 730 is made of an elastic material.

[0082] Here, the soft material may refer to a material that does not break but deforms even when subjected to a force exceeding its elastic limit. For example, the soft material may refer to a material in which the load (reaction force) applied to curved surface 733a of shield terminal 730 exceeds its elastic limit. And, the elastic material may refer to a material in which the load (reaction force) applied to curved surface 733a of shield terminal 730 is within its elastic limit.

[0083] Therefore, the soft material means a material that cannot return to its original state even when the reaction force (deforming force) is removed because the reaction force exceeds its elastic limit, and therefore the material remains deformed, and can be called a plastic material, whereas the elastic material means a material that returns to its original state when the reaction force is removed because the reaction force does not exceed its elastic limit, and can be called an elastically deformable material.

[0084] 8a, when the shield terminal 730 is made of a flexible material, the fourth region 734 may be disposed so as not to overlap with the second region 732 in the axial direction. Thus, the fourth region 734 may be formed to have an offset G in the radial direction from the second region 732. As shown in FIG. 8a, the fourth region 734 may be disposed so as to be spaced apart from the imaginary line L with a predetermined distance with respect to an imaginary line L that crosses the second region 732 in the axial direction. Thus, when the third region 733 is deformed, the fourth region 734 may easily come into contact with the lower corner 242 of the hole 240 even if the deformation amount of the third region 733 is less than the deformation amount of the third region 733 of the shield terminal 730 made of an elastic material.

[0085] 8b, when the shield terminal 730 is made of an elastic material, the fourth region 734 may be disposed to overlap the second region 732 in the axial direction. Thus, the fourth region 734 may be formed so as not to form an offset G in the radial direction with respect to the second region 732. As shown in FIG 8b, the fourth region 734 may be disposed on an imaginary line L that crosses the second region 732 in the axial direction. Thus, even if the third region 733 is elastically deformed by the reaction force, the fourth region 734 may easily come into contact with the lower corner 242 of the hole 240.

[0086] FIG. 9 shows a modification of the hole formed in the cover disposed in the motor according to the embodiment.

[0087] 9, the hole 240 of the cover 200 may be formed in a tapered shape. For example, the hole 240 may be formed in a tapered shape with an inner diameter of an upper side larger than an inner diameter of a lower side. As a result, the fourth region 734 may more easily come into contact with a corner 242 on the lower side of the hole 240. For example, the inner circumferential surface 241 of the hole 240 formed in a tapered shape is in sliding contact with the curved surface 733a, so that the fourth region 734 may more easily come into contact with a corner 242 on the lower side of the hole 240.

[0088] In particular, when the shield terminal 730 is formed of the soft material, even if the deformation amount of the third region 733 is less than the deformation amount of the third region 733 of the shield terminal 730 formed of the elastic material, the tapered shape allows the fourth region 734 to more easily contact the lower corner 242 of the hole 240.

[0089] Although the present invention has been described above with reference to preferred embodiments, it will be understood by those skilled in the art that various modifications and variations of the present invention may be made without departing from the spirit and scope of the present invention as set forth in the following claims. [Explanation of symbols]

[0090] 1: Motor 100: Housing 200:Cover 240: Hall 300:Stator 310: Stator core 320: Coil 330: Insulator 400:Rotor 500: Shaft 600: Busbar 700: Connector 730: Shield terminal

Claims

1. housing, a cover disposed on the top of the housing; a stator disposed inside the housing; A rotor disposed inside the stator; a shaft coupled to the rotor; and a connector disposed on the top of the cover; The connector includes a connector body and a shield terminal arranged so that a portion of the shield terminal is exposed to the connector body, The cover is made of a metal material. The shield terminal is A first region, a portion of which is disposed in the connector body; a second region extending axially from an end of the first region; a third region extending to have a curved surface at an end of the second region; and a fourth region extending in the axial direction from an end of the third region; the third region is warped at one region by a reaction force formed by contact between an inner circumferential surface of the hole and the curved surface when the shield terminal is inserted into the hole of the cover, The fourth region is changed in position by the reaction force so as to be inclined with respect to the axial direction and contacts a lower corner of the hole.

2. The motor of claim 1 , wherein the fourth region is disposed to be offset from the second region.

3. The motor according to claim 1 , wherein the fourth region is disposed on an imaginary line (L) that axially crosses the second region.

4. The hole is formed to have a circular horizontal cross section, The motor according to claim 1 , wherein the shield terminal is formed by bending a plate-like member.

5. The motor of claim 4 , wherein the hole is tapered.

6. The motor according to claim 5 , wherein an inner peripheral surface of the hole is in sliding contact with the curved surface.

7. The cover is Cover body, a first cover protrusion extending from an outer periphery of the cover body so as to protrude upward in the axial direction; A second cover protruding portion extending from the cover body so as to protrude downward in the axial direction; and The hole is formed in the cover body so as to penetrate the cover body in the axial direction. The motor according to claim 1 , wherein a bearing is disposed inside the second cover protrusion.

8. The stator further includes a bus bar disposed on an upper portion of the stator. The busbar includes a busbar body and a plurality of busbar terminals disposed on the busbar body, The motor according to claim 1 , wherein an end of the bus bar terminal disposed to penetrate the cover is electrically connected to a power terminal of the connector.

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