Motor

Abstract

The present invention may provide a motor comprising: a housing; a stator disposed within the housing; a rotor disposed within the stator; a busbar disposed on the stator; a plate disposed on the busbar; and a terminal portion comprising a body portion in contact with the plate and a protrusion protruding from the body portion and disposed on the plate, wherein a portion of the body portion is disposed radially between the housing and the plate.

Description

Technology Field

[0001] The example relates to a motor. Background Technology

[0002] The motor may include a rotor, a stator, a housing, and a plate. The rotor and the stator are contained within the housing. The housing is a cylindrical member with an open top. The plate covers the open top of the housing. A busbar may be positioned on the upper side of the stator. The terminals of the busbar are connected to coils wound on the stator, and the terminals of the busbar may be connected to an axially elongated terminal section. The terminal section is connected to an external power source.

[0003] Because the terminal portion extends axially, the bonding strength between the mold of the terminal portion and the plate may be reduced. To improve bonding strength, the protrusion of the terminal portion penetrating the plate can be ultrasonically welded and bonded to the plate.

[0004] However, ultrasonic welding of protrusions has the problem that it is difficult to manage the welded part. In addition, the ultrasonic welding process is complex, and there is a problem that the terminal part shakes and the position becomes misaligned during the welding process. The problem to be solved

[0005] Accordingly, the embodiment aims to solve the above-mentioned problems and sets as its objective the provision of a motor that facilitates the assembly of the terminal portion.

[0006] The problems that the present invention aims to solve are not limited to those mentioned above, and other problems not mentioned herein will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0007] An embodiment for achieving the above objective may provide a motor comprising a housing, a stator disposed within the housing, a rotor disposed within the stator, a bus bar disposed on the stator, a plate disposed on the bus bar, a terminal portion including a body portion in contact with the plate and a protrusion protruding from the body portion and disposed on the plate, wherein a portion of the body portion is disposed radially between the housing and the plate.

[0008] An embodiment may provide a motor comprising a housing, a stator disposed within the housing, a rotor disposed within the stator, a bus bar disposed on the stator, a plate disposed on the bus bar, a body portion in contact with the plate, and a terminal portion including a protrusion protruding from the body portion and protruding over the plate, wherein the body portion includes a first region disposed to overlap the plate in a radial direction and a second region disposed to overlap the plate in an axial direction, and the first region disposed radially to the outside of the plate.

[0009] An embodiment may provide a motor comprising a housing, a stator disposed within the housing, a rotor disposed within the stator, a bus bar disposed on the stator, a plate disposed on the bus bar, a body portion in contact with the plate, and a terminal portion including a protrusion protruding from the body portion and protruding above the plate, wherein the body portion includes a first body disposed on the plate, a second body disposed below the plate, and a third body connecting the first body and the second body, and the third body is disposed on the outside of the plate.

[0010] Preferably, the body portion includes a first hole penetrating the outer and inner sides of the body portion in a first direction, and the plate may include a first projection protruding from the edge of the plate and disposed in the first hole.

[0011] Preferably, the body portion includes a second projection protruding in the axial direction, and the plate includes a second hole in which the second projection is located, with the length being longer than the width, and the longitudinal direction of the second hole may be parallel to the first direction.

[0012] Preferably, the body portion may include a first surface disposed opposite to the inner surface of the housing and having the second hole disposed therein.

[0013] Preferably, the body portion may include a plurality of first ribs that protrude radially from the first surface and contact the inner surface of the housing.

[0014] Preferably, the first hole includes a second surface and a third surface arranged facing each other with respect to the axial direction, and the axial distance between the second surface and the third surface is greater than the thickness of the plate and less than the height of the body part, and at least one of the boundary between the second surface and the inner surface of the body part and the boundary between the third surface and the inner surface of the body part may include a first inclined surface.

[0015] Preferably, the body portion may include a second rib that protrudes from at least one of the second surface and the third surface and contacts the plate.

[0016] Preferably, the terminal portion includes a terminal connected to the busbar terminal of the busbar, and the plate includes a third hole positioned to correspond to the position of the terminal. In the first direction, the first projection may be positioned to overlap the third hole. Effects of the invention

[0017] According to the embodiment, there is an advantage that the terminal part can be easily assembled to the plate without ultrasonic welding or a separate fastening member.

[0018] According to the embodiment, there is an advantage in that deformation or foreign substances can be reduced during the assembly process of the terminal part. Brief explanation of the drawing

[0019] FIG. 1 is a drawing illustrating a motor according to an embodiment, FIG. 2 is a drawing showing the busbar, plate, and terminal part before joining. FIG. 3 is a perspective view of the terminal section, Fig. 4 is a front view of the terminal section, FIG. 5 is a drawing showing the body portion of the terminal portion, FIG. 6 is a side cross-sectional view showing the terminal part and the plate mounted in the housing based on AA of FIG. 3. FIG. 7 is a side cross-sectional view with the terminal part and plate mounted on the housing, based on the BB of FIG. 3. FIG. 8 is a drawing showing a plate, FIG. 9 is a drawing illustrating a state in which the first rib is in contact with the inner surface of the housing while the terminal portion is mounted on the housing. FIG. 10 is a perspective view illustrating the state in which a terminal part is assembled to a plate. FIG. 11 is a side view illustrating the state in which the terminal part is assembled to the plate. Specific details for implementing the invention

[0020] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0021] However, the technical concept of the present invention is not limited to some of the described embodiments but can be implemented in various different forms, and within the scope of the technical concept of the present invention, one or more of the components among the embodiments may be selectively combined or substituted.

[0022] In addition, terms used in the embodiments of the present invention (including technical and scientific terms) may be interpreted in a sense that is generally understood by those skilled in the art to which the present invention belongs, unless explicitly and specifically defined otherwise. Terms that are commonly used, such as terms defined in advance, may be interpreted in consideration of their meaning in the context of the relevant technology.

[0023] Furthermore, the terms used in the embodiments of the present invention are for the purpose of describing the embodiments and are not intended to limit the present invention.

[0024] In this specification, the singular form may include the plural form unless specifically stated otherwise in the text, and when described as “at least one of A and B, C (or more than one of them),” it may include one or more of all combinations that can be formed from A, B, and C.

[0025] In addition, terms such as first, second, A, B, (a), (b), etc. may be used when describing the components of the embodiments of the present invention.

[0026] These terms are intended merely to distinguish a component from other components and are not limited by the nature, order, sequence, etc., of the said component.

[0027] And, where it is stated that a component is 'connected', 'combined', or 'joined' to another component, this may include not only cases where the component is directly connected, combined, or joined to the other component, but also cases where it is 'connected', 'combined', or 'joined' due to another component located between the component and the other component.

[0028] Furthermore, when described as being formed or placed on the “top or bottom” of each component, “top or bottom” includes not only cases where two components are in direct contact with each other, but also cases where one or more other components are formed or placed between the two components. Additionally, when expressed as “top or bottom,” it may include the meaning of a downward direction as well as an upward direction relative to a single component.

[0029] FIG. 1 is a drawing illustrating a motor according to an embodiment.

[0030] Referring to FIG. 1, the motor according to the embodiment may include a rotor (100), a magnet (200), a stator (300), a cover (400), a housing (500), a bus bar (600), a plate (700), and a terminal portion (800). Hereinafter, "inner side" refers to a direction arranged toward the rotor (200) with respect to the radial direction of the motor, and "outer side" refers to a direction opposite to the inner side.

[0031] The rotor (100) may be a hollow member with one side open. In the axial direction, both ends of the rotor (100) may be rotatably supported by bearings. The shaft (100) may have parts with different outer diameters arranged along the axial direction.

[0032] The magnet (200) can be placed on the outer surface of the rotor (100).

[0033] The stator (300) is positioned on the outside of the magnet (200). The stator (300) may include a stator core (310), an insulator (320) mounted on the stator core (310), and a coil (330) wound on the insulator (320). The coil (330) forms a magnetic field. The stator core (310) may be a single component or a combination of multiple divided cores. Additionally, the stator core (310) may be formed by stacking multiple plates in the form of thin steel plates, but is not necessarily limited thereto. For example, the stator core (310) may be formed as a single piece.

[0034] The cover (400) secures the magnet (200) to the rotor (100). The cover (400) covers a portion of the magnet (200) and the rotor (100). The cover (400) may be a molded member formed through overmolding, or a can member or an adhesive member that encloses the magnet.

[0035] The housing (500) may be positioned outside the stator (300). The housing (500) may be a cylindrical member with an open top. The housing (500) accommodates the shaft (100), magnet (200), stator (300), and cover (400) inside. The housing (500) may also accommodate a bearing that supports the shaft (100).

[0036] The busbar (600) is positioned on the upper side of the stator (300). The busbar (600) connects the coils (330) wound on the stator (300).

[0037] The plate (700) is positioned on the upper side of the bus bar (600). A bearing (10) is accommodated on the inner side of the plate (700).

[0038] The terminal portion (800) is positioned on the upper side of the plate (700).

[0039] FIG. 2 is a drawing showing the bus bar (600), plate (700), and terminal part (800) before assembly.

[0040] Referring to FIGS. 2 and 3, a busbar (600) may be positioned on the lower side of a plate (700). The busbar (600) may include a busbar body (610) and a busbar terminal (620). The busbar body (610) may be an annular molded member. The busbar terminal (620) may be connected to the end of a coil (330). The first terminal terminal (621) of the busbar terminal (620) contacts the terminal portion (800). The first terminal terminal (621) is positioned extending upward. Three first terminal terminals (621) may each be connected to power sources on the U, V, and W phases.

[0041] A plate (700) is positioned on the upper side of the bus bar (600). The plate (700) may be an annular member. A bearing supporting the rotor (100) may be positioned on the inner side of the plate (700).

[0042] The terminal portion (800) may include a body portion (810), a terminal (820), and a protrusion (830).

[0043] The body part (810) is fixed to the plate (700) and the housing (500).

[0044] The terminal (820) is connected to an external power source or a terminal of the housing cover connected to the external power source. The terminal (820) is fixed to the protrusion (830). The second terminal terminal (821) of the terminal (820) contacts the first terminal terminal (621) of the busbar (600).

[0045] The protrusion (830) surrounds the terminal (820). The protrusion (830) protrudes from the body portion (810) and is positioned on the plate (700). The protrusion (830) is extended so that the terminal (820) can be connected to an external power source or a terminal of the housing cover connected to the external power source.

[0046] This terminal section (800) is separate from the bus bar (600).

[0047] Fig. 3 is a perspective view of the terminal section, and Fig. 4 is a front view of the terminal section.

[0048] Referring to FIGS. 2 to 4, the protrusion (830) protrudes from the body portion (810). The protrusion (830) supports the terminal (820) which is arranged lengthwise and serves to guide the terminal (820) to an external power source or a power terminal of the housing cover connected to the external power source.

[0049] A portion of the terminal (820) is exposed at the tip of the protrusion (830). The protrusion (830) includes an opening (831). The opening (831) is intended to expose the second terminal terminal (821) of the terminal (820) to the outside for fusing. When the terminal portion (800) is fixed to the plate (700) and the plate (700) is fixed to the housing (500), the first terminal terminal (621) of the bus bar (600) and the second terminal terminal (821) of the terminal portion (800) are arranged to overlap so as to make surface contact at the opening (831).

[0050] FIG. 5 is a drawing illustrating the body portion (810) of the terminal portion (800).

[0051] Referring to FIG. 5, the body portion (810) is fixed to the housing (500) and the plate (700) and structurally supports the terminal (820) placed on the protrusion (830) together with the protrusion (830). This body portion (810) may include a first body (811), a second body (812), and a third body (813).

[0052] The first body (811) is positioned on top of the plate (700). The protrusion (830) protrudes from the first body (811). The second body (812) is positioned below the plate (700). The third body (813) connects the first body (811) and the second body (812). There may be multiple third bodies (813). Multiple third bodies (813) may be spaced apart. A first hole (814) that penetrates the inner and outer sides of the body portion (810) may be positioned between the third bodies (813). The first hole (814) is where the first projection (710) of the plate (700) is inserted.

[0053] A first rib (815) may be arranged to protrude radially on the first surface (801) of the body portion (810). The first surface (801) is a surface facing the inner circumferential surface of the housing (500). The first rib (815) is a part that contacts the inner surface (520) of the housing (500) during the process in which the terminal portion (800) is mounted on the housing (500). This first rib (815) may be arranged in an axially elongated manner. Additionally, multiple first ribs (815) may be arranged. For example, some of the multiple first ribs (815) may be arranged on one side of the first hole (814), and other parts may be arranged on the other side of the first hole (814). Additionally, some of the multiple first ribs (815) may be arranged across the first hole (814). A second rib (814c) may be protruded and disposed on the inner surface of the body portion (810) forming the first hole (814). The second rib (814c) contacts the first projection (710) of the plate (700) inserted into the first hole (814).

[0054] The body portion (810) may include a second projection (816). The second projection (816) may protrude axially from the lower surface of the first body (811). The second projection (816) is intended to guide the assembly direction of the terminal portion (800) during the process of assembling the terminal portion (800) to the plate (700).

[0055] FIG. 6 is a side cross-sectional view showing the terminal part (800) and the plate (700) mounted on the housing (500) based on AA of FIG. 3.

[0056] Referring to FIGS. 5 and 6, after the terminal portion (800) is assembled to the plate (700), the terminal portion (800) and the plate (700) can be mounted in the housing (500). The terminal portion (800) and the plate (700) can be mechanically joined without ultrasonic welding or separate fastening members.

[0057] Based on the axial direction, the space between the lower surface of the first body (811) and the upper surface of the second body (812) is formed like a slot, and the terminal part (800) and the plate (700) can be mechanically assembled in such a way that a part of the plate (700) is inserted into this space. Then, the terminal part (800) is mounted on a step (510) arranged on the inner surface (520) of the housing (500) while coupled to the plate (700), and is additionally coupled to the housing (500). Accordingly, a part of the body part (810) is positioned between the housing (500) and the plate (700) based on the radial direction.

[0058] The body portion (810) includes a first region (S1) that overlaps the plate (700) in the radial direction and a second region (S2) that overlaps the plate (700) in the axial direction. The first region (S1) is positioned on the third body (813) and is positioned on the outer side of the plate (700). The second region (S2) is positioned on the first body (811) and the second body (812), respectively, and is positioned on the upper and lower sides of the plate (700) respectively with respect to the plate (700). The third body (813) may contact the inner surface (520) of the housing (500). The second body (812) is positioned on the lower side of the plate (700) and may contact the step (510) of the housing (500).

[0059] FIG. 7 is a side cross-sectional view with the terminal part (800) and plate (700) mounted on the housing (500) based on the BB of FIG. 3.

[0060] Referring to FIG. 7, when a terminal portion (800) is assembled to a plate (700), a first projection (710) of the plate (700) is placed in a first hole (814) of the body portion (810). The first hole (814) may include a second surface (814a) and a third surface (814b) that are positioned facing each other with respect to the axial direction. The axial distance (d) between the second surface (814a) and the third surface (814b) may be greater than the thickness (t) of the plate (700) and smaller than the height (h) of the body portion (810).

[0061] A first inclined surface (812a) may be disposed at least on the boundary between the second surface (814a) and the inner surface of the body part (810) or between the third surface (814b) and the inner surface (520) of the body part (810). The first inclined surface (812a) expands the entrance of the first hole (814) to guide the first projection (710) of the plate (700) to be easily slid and inserted into the first hole (814).

[0062] A second inclined surface (813b) may also be disposed at the corner near the boundary between the lower surface and the outer surface of the body part (810). This second inclined surface (813b) serves to reduce interference between the housing (500) and the body part (810) when the terminal part (800) is mounted on the housing (500) while fixed to the plate (700).

[0063] FIG. 8 is a drawing showing a plate (700).

[0064] Referring to FIG. 8, the plate (700) may include a first projection (710), a second hole (720), and a third hole (730).

[0065] The first projection (710) protrudes outward along the first direction (F) from the edge of the plate (700). Here, the first direction (F) is the direction in which the terminal portion (800) slides to be assembled to the plate (700). The first hole (814) of the body portion (810) is also formed along the first direction (F) corresponding to the direction of protrusion of the first projection (710). The edge (711) of the first projection (710) may be a curved surface. In this case, the center of curvature of the edge (711) of the first projection (710) may be the same as the center (C) of the plate (700).

[0066] The second hole (720) penetrates the plate (700) in the axial direction and is where the first projection (710) of the terminal portion (800) is positioned. During the process of inserting the body portion (810) into the plate (700), the second projection (816) moves along the second hole (720) to guide the movement of the body portion (810). This second hole (720) can be formed concavely inward from the edge of the plate (700).

[0067] The second hole (720) is also arranged along the first direction (F). Multiple second holes (720) may be arranged. For example, the second hole (720) may include a second-1 hole (721) and a second-2 hole (722), where the second-1 hole (721) is arranged on one side of the first projection (710) and the second-2 hole (722) is arranged on the other side of the second projection (816). The longitudinal direction of the second-1 hole (721) and the longitudinal direction of the second-2 hole (722) are both directions parallel to the first direction (F).

[0068] The third hole (730) penetrates the plate (700) in the axial direction and is where the busbar terminal (820) penetrates. When the terminal part (800) is assembled to the plate (700), the position of the third hole (730) corresponds to the position of the terminal (820) of the terminal part (800). The first projection (710) can be arranged to overlap with the third hole (730) with respect to the first direction (F).

[0069] FIG. 9 is a drawing showing the state in which the first rib (815) is in contact with the inner surface (520) of the housing (500) while the terminal part (800) is mounted on the housing (500).

[0070] Referring to FIG. 9, when the terminal portion (800) is mounted on the housing (500), the first rib (815) comes into contact with the inner surface (520) of the housing (500). If the first surface (801) of the body portion (810) comes into direct contact with the inner surface (520) of the housing (500), a gap is created between the body portion (810) and the inner surface (520) of the housing (500), and there is a risk that the terminal portion (800) will move or detach. However, if a plurality of first ribs (815) each come into contact with the inner surface (520) of the housing (500), the terminal portion (800) is prevented from moving.

[0071] FIG. 10 is a perspective view illustrating the state in which the terminal part (800) is assembled to the plate (700), and FIG. 11 is a side view illustrating the state in which the terminal part (800) is assembled to the plate (700).

[0072] FIG. 10(a) and FIG. 11(a) illustrate a terminal part (800) and a plate (700) before being assembled together, in which the first hole (814) of the terminal part (800) and the first projection (710) of the plate (700) are aligned. FIG. 10(b) and FIG. 11(a) illustrate a state in which the terminal part (800) is pushed along the first direction (F) and fixed to the plate (700). When the terminal part (800) is pushed along the first direction (F), the first projection (710) is inserted into the first hole (814), and the terminal part (800) is coupled to the plate (700). At this time, the first projection (710) of the terminal part (800) moves along the first hole (814) of the plate (700) to guide the movement of the terminal part (800). When the first projection (710) is inserted into the first hole (814), the first projection (710) comes into contact with the second rib (814c). Therefore, it is possible to prevent movement of the plate (700) that may occur between the first hole (814) and the first projection (710) compared to when the first projection (710) is in direct contact with the second surface (814a) or the third surface (814b).

[0073] In this way, since the terminal part (800) is pushed from the outer side to the inner side of the plate (700) based on the radial direction to assemble the terminal part (800) and the plate (700), there is an advantage that the assembly process is very simple and fast. In addition, since the first body (811) and the second body (812) of the terminal part (800) fix the plate (700) from the upper and lower sides of the plate (700) based on the axial direction, and the third body (813) of the terminal part (800) restrains the plate (700) in the radial direction, the terminal part (800) can be firmly connected to the plate (700) without the need for separate fastening members or a welding process.

[0074] In addition, when the terminal part (800) is mounted on the housing (500), the inner surface (520) of the housing (500) restrains the body part (810) of the terminal part (800) from moving out in the radial direction, and in particular, since the outer surface of the body part (810) is in contact with the inner surface (520) of the housing (500), the structural stability is significantly higher than that of assembling the terminal part (800) through a fastening member or a fusion process.

[0075] For the above, a motor according to one preferred embodiment of the present invention has been specifically examined with reference to the attached drawings.

[0076] The foregoing description is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art to which the present invention pertains will be able to make various modifications, changes, and substitutions within the scope of the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are intended to explain, not limit, the technical concept of the present invention, and the scope of the technical concept of the present invention is not limited by such embodiments and accompanying drawings. The scope of protection of the present invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention. Explanation of the symbols

[0077] 100: Rotor 200: Magnet 300: Status 400: Cover 500: Housing 600: Busbar 610: Busbar body 620: Bus terminal 700: Plate 710: 1st projection 720: 2nd Hall 730: 3rd Hall 800: Terminal section 810: Body 811: First Body 812: Second body 813: Third body 814: 1st Hall 815: 1st Lib 816: Second projection 820: Terminal 830: Protrusion 831: Opening

Claims

Claim 1 A motor comprising: a housing; a stator disposed within the housing; a rotor disposed within the stator; a bus bar disposed on the stator; a plate disposed on the bus bar; and a terminal portion comprising a body portion in contact with the plate and a protrusion protruding from the body portion and disposed on the plate, wherein the body portion comprises a first hole penetrating the outer and inner sides of the body portion, and the plate comprises a first projection protruding from the edge of the plate and coupled to the first hole. Claim 2 In claim 1, a motor in which a portion of the body part is disposed radially between the housing and the plate. Claim 3 In claim 1, the body portion includes a first region arranged to overlap the plate in a radial direction and a second region arranged to overlap the plate in an axial direction, and the first region is a motor arranged on the outer side of the plate in a radial direction. Claim 4 In claim 1, the body portion comprises a first body disposed on the plate, a second body disposed below the plate, and a third body connecting the first body and the second body, wherein the third body is a motor disposed on the outer side of the plate. Claim 5 A motor according to claim 1, wherein the body portion includes a second projection protruding in the axial direction, the plate includes a second hole in which the second projection is located and which is arranged with a length longer than its width, and the longitudinal direction of the second hole is parallel to the direction in which the terminal portion slides to be assembled to the plate. Claim 6 In claim 5, the motor comprises a body portion disposed opposite to the inner circumferential surface of the housing and a first surface on which the second hole is disposed. Claim 7 In claim 6, the motor comprises a plurality of first ribs that protrude radially from the first surface and contact the inner surface of the housing. Claim 8 A motor according to claim 1, wherein the first hole includes a second surface and a third surface arranged facing each other with respect to the axial direction, the axial distance between the second surface and the third surface is greater than the thickness of the plate and less than the height of the body part, and at least one of the boundary between the second surface and the inner surface of the body part and the boundary between the third surface and the inner surface of the body part includes a first inclined surface. Claim 9 In claim 8, the body portion comprises a second rib protruding from at least one of the second surface and the third surface and contacting the plate. Claim 10 In claim 1, the terminal portion includes a terminal connected to the busbar terminal of the busbar, and the plate includes a third hole positioned to correspond to the position of the terminal. The motor has a first projection positioned to overlap the third hole in the direction in which the terminal portion slides to be assembled to the plate.

Images