Busbar and motor comprising a busbar

Abstract

Embodiments provide a motor including a stator, a rotor disposed corresponding to the stator, a shaft coupled to the rotor, and a bus bar disposed above the stator, wherein: the bus bar includes a bus bar body and a plurality of bus bar terminals disposed in the bus bar body; each of the bus bar terminals includes a body portion and a power terminal portion coupled to the body portion; the body portion includes a body, a plurality of terminal parts disposed in the body, and a protrusion protruding from an upper surface of the body in a shaft direction; and one surface of a lower portion of the power terminal portion is in contact with an inner surface of the protrusion. Accordingly, the motor uses a bus bar terminal having a structure in which a power terminal portion is coupled to a body portion, and thus can minimize waste generated in a forming process of the bus bar terminal.

Description

Technical Field

[0001] This embodiment relates to a busbar and a motor including the busbar. Background Technology

[0002] The motor may include a busbar disposed on the stator. In this case, the busbar may include busbar terminals that are connected to the end portions of coils disposed on the stator.

[0003] In conventional busbar terminals, the finished busbar terminal can be formed by providing the main part formed through a main process of cutting a plate component and bending the main part. However, a problem with conventional busbar terminals is that a lot of waste is generated during the forming process of cutting a plate component.

[0004] Furthermore, one side of a conventional busbar terminal can be connected to a component, such as a connector for applying external power. Accordingly, the problem is that electroplating across the entire conventional busbar terminal increases production costs. Moreover, due to the complex structure of the conventional busbar terminal resulting from multiple bending processes, electroplating must be performed using a rack plating method, further increasing production costs.

[0005] Therefore, there is a need to develop a busbar terminal structure that can reduce electroplating costs while minimizing waste. Summary of the Invention

[0006] Technical issues

[0007] The embodiments aim to provide a busbar formed by minimizing waste generation through the use of a busbar terminal that connects two components, and a motor including the busbar.

[0008] The embodiment aims to provide a busbar having a protruding structure that increases the fixing force between two components when the two components constituting the busbar terminal are welded together, and a motor including the busbar.

[0009] Furthermore, the embodiments aim to provide a motor that is compatible with various connection locations of an external power source.

[0010] Technical solution

[0011] One aspect of the present invention provides a motor comprising: a stator, a rotor configured to correspond to the stator, a shaft coupled to the rotor, and a busbar disposed above the stator, wherein the busbar includes a busbar body and a plurality of busbar terminals disposed on the busbar body, each of the busbar terminals including a body portion and a power terminal portion coupled to the body portion, the body portion including a body, a plurality of terminals disposed on the body, and a protrusion projecting axially from an upper surface of the body, and a lower surface of the power terminal portion contacting an inner surface of the protrusion. In this case, the lower end of the power terminal portion may be configured to be spaced axially away from the upper surface of the body by a predetermined interval (d).

[0012] Another aspect of the present invention provides a busbar including a busbar body and a plurality of busbar terminals connected by a welding process, wherein each busbar terminal includes a body portion and a power terminal portion connected to the body, the body portion including a body, a plurality of terminals disposed on the body, and a protrusion protruding from the upper surface of the body in an axial direction, and the lower surface of the power terminal portion contacting the inner surface of the protrusion.

[0013] The power terminal portion may include: a first region disposed at a predetermined interval (d) away from the upper surface of the body, a second region extending radially from the end portion of the first region, and a third region extending axially from the end portion of the second region, wherein the outer surface of the first region may contact the inner surface of the protrusion, and the lower surface of the second region may contact the upper surface of the protrusion.

[0014] The power terminal portion may include: a first region disposed at a predetermined interval (d) away from the upper surface of the body, a second region extending radially from the end portion of the first region, a third region extending axially from the end portion of the second region, and a protrusion protruding from the outer surface of the first region, wherein the protrusion, which is formed in a hemispherical shape, can contact the inner surface of the protrusion.

[0015] The protrusion may include a first protrusion extending axially from the upper surface of the body and a second protrusion extending outwardly from the end portion of the first protrusion. The power terminal portion may include a first region spaced apart from the upper surface of the body by a predetermined interval (d), a second region extending radially from the end portion of the first region, and a third region extending axially from the end portion of the second region. The inner surface of the second protrusion may contact the outer surface of the first region.

[0016] The protrusion may include a first protrusion extending axially from the upper surface of the body and a second protrusion extending outwardly from the end portion of the first protrusion. The power terminal portion may include: a first region disposed at a predetermined interval (d) away from the upper surface of the body, a second region extending radially from the end portion of the first region, a third region extending axially from the end portion of the second region, and a protrusion protruding from the outer surface of the first region. The protrusion, which is hemispherical in shape, may contact the inner surface of the second protrusion.

[0017] Another aspect of the present invention provides a motor comprising: a shaft, a rotor coupled to the shaft, and a stator configured to correspond to the rotor, wherein the stator includes a stator core, an insulator coupled to the stator core, and a coil disposed on the insulator; the busbar includes a plurality of busbar terminals electrically connected to the coil and a busbar retainer supporting the busbar terminals; each of the plurality of busbar terminals includes a first body and a second body coupled to the first body; and in at least some of the plurality of busbar terminals, the first body is twisted and coupled to the second body; and in at least some of the plurality of busbar terminals, the center of curvature of the second body is different.

[0018] Beneficial effects

[0019] The busbar and motor including the busbar according to the embodiment can minimize the amount of waste generated when forming the busbar terminal, because the busbar terminal is implemented as a connection structure having a body portion and a power terminal portion.

[0020] Furthermore, in the implementation, since the electroplating process can be performed on the front of the power terminal portion, and multiple power terminal portions can be electroplated in a barrel plating manner, the electroplating cost can be minimized.

[0021] An advantage of this implementation is that it provides a busbar terminal that is compatible with various connection locations of external power sources.

[0022] The advantage of this implementation method is that it simplifies the manufacturing process by eliminating the bending process of the busbar terminals. Attached Figure Description

[0023] Figure 1 The illustration shows a view of a motor according to an embodiment.

[0024] Figure 2 The illustration shows a cross-sectional view of a motor according to an embodiment.

[0025] Figure 3The illustration shows a perspective view of the busbar of the motor according to the first embodiment.

[0026] Figure 4 This is a perspective view illustrating a plurality of busbar terminals disposed in a busbar in a motor according to the first embodiment.

[0027] Figure 5 This is a plan view illustrating a plurality of busbar terminals disposed in a busbar in a motor according to the first embodiment.

[0028] Figure 6 This is an expanded view showing the main body portion of the busbar terminal provided in the motor according to the first embodiment.

[0029] Figure 7 This is a perspective view illustrating a first example of a busbar terminal disposed in a motor according to a first embodiment.

[0030] Figure 8 This is an exploded perspective view illustrating a first example of a busbar terminal disposed in a motor according to the first embodiment.

[0031] Figure 9 This is a plan view illustrating a first example of a busbar terminal disposed in a motor according to the first embodiment.

[0032] Figure 10 This is a side view illustrating a first example of a busbar terminal disposed in a motor according to the first embodiment.

[0033] Figure 11 It is along Figure 9 A cross-sectional view of line BB.

[0034] Figure 12 This is a view illustrating a modified example of the body portion of the busbar terminal according to the first example, which is provided in the motor according to the first embodiment.

[0035] Figure 13 This is a perspective view illustrating a second example of a busbar terminal disposed in a motor according to the first embodiment.

[0036] Figure 14 This is an exploded perspective view illustrating a second example of a busbar terminal disposed in a motor according to the first embodiment.

[0037] Figure 15 This is a plan view illustrating a second example of a busbar terminal disposed in a motor according to the first embodiment.

[0038] Figure 16 This is a side view illustrating a second example of a busbar terminal disposed in a motor according to the first embodiment.

[0039] Figure 17 It is along Figure 15 A cross-sectional view of line CC.

[0040] Figure 18 This is a view illustrating a modified example of the body portion of the busbar terminal according to the second example, which is provided in the motor according to the first embodiment.

[0041] Figure 19 This is a perspective view illustrating a third example of a busbar terminal disposed in a motor according to the first embodiment.

[0042] Figure 20 This is an exploded perspective view illustrating a third example of a busbar terminal provided in a motor according to the first embodiment.

[0043] Figure 21 This is a plan view illustrating a third example of a busbar terminal disposed in a motor according to the first embodiment.

[0044] Figure 22 This is a side view illustrating a third example of a busbar terminal disposed in a motor according to the first embodiment.

[0045] Figure 23 It is along Figure 21 Cross-sectional view of line DD.

[0046] Figure 24 The illustration shows a view of the power terminal portion of the busbar terminal according to a third example provided in the motor according to the first embodiment.

[0047] Figure 25 This is a view illustrating the busbar terminal and busbar retainer of the motor according to the second embodiment.

[0048] Figure 26 The diagram shows a plan view of the busbar terminal of the motor according to the second embodiment.

[0049] Figure 27 This is a plan view illustrating a busbar having overlapping areas of busbar terminals according to the second embodiment of the motor.

[0050] Figure 28 It's a diagram. Figure 26 The diagram shows an exploded view of the busbar terminals.

[0051] Figure 29 This is a 3D view illustrating the assembled busbar terminals.

[0052] Figure 30This is a view illustrating a busbar terminal including a first body having a bent shape.

[0053] Figure 31 This is a perspective view of an assembled busbar terminal. Figure 30 Busbar terminals,

[0054] Figure 32 This is a developed view illustrating the plate component that forms the second body of the busbar terminal.

[0055] Figure 33 This is a developed view illustrating the plate component that forms the first body of the busbar terminal.

[0056] Figure 34 This is an enlarged plan view illustrating the cross-sectional shape of the busbar terminal. Detailed Implementation

[0057] In the following, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the technical spirit of the present invention is not limited to the embodiments to be described and which may be implemented in various different forms, and at least one or more components of the embodiments may be selectively combined, substituted, and used.

[0058] Furthermore, when any element is described as being formed or positioned "on" or "below" another element, this description includes both cases where the two elements are formed or positioned in direct contact with each other, and cases where one or more other elements are inserted between the two elements. Additionally, when an element is described as being formed "on" or "below" another element, this description can include cases where one element is formed above or below the other element.

[0059] In the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings, the same or corresponding parts will be indicated by the same reference numerals in all figures, and redundant descriptions will be omitted.

[0060] First Implementation Method

[0061] Figure 1 The illustration shows a view of a motor according to the first embodiment. Figure 2 The illustration shows a cross-sectional view of a motor according to a first embodiment. In this case, Figure 2 It is along Figure 1 The cross-sectional view of line AA. Furthermore, in Figure 1 In this context, the x-direction can represent the radial direction, and the y-direction can represent the axial direction. Furthermore, the axial and radial directions can be perpendicular to each other. In this case, the axial direction can be the longitudinal direction of shaft 500.

[0062] Reference Figure 1 and Figure 2 The motor according to the first embodiment may include a housing 100 having an opening formed on one side thereon, a cover 200 disposed on the housing 100, a stator 300 disposed within the housing 100, a rotor 400 disposed within the stator 300, and a shaft 500 connected to the rotor 400. In this case, the term "inward" may refer to a direction toward the rotation center C of the motor in the radial direction, and the term "outward" may refer to the opposite direction to "inward".

[0063] In addition, the motor may include a busbar 600 disposed above the stator 300 and a sensor component 900 for detecting the rotation of the rotor 400.

[0064] The housing 100 and cover 200 can form the exterior of the motor. Furthermore, the housing 100 and cover 200 can be joined to form a receiving space therein. Therefore, as... Figure 2 As shown in the diagram, the stator 300, rotor 400, shaft 500, busbar 600, sensor component 900, etc. can be installed in this receiving space.

[0065] In this configuration, the shaft 500 is rotatably disposed within the receiving space. Accordingly, the motor may also include bearings B disposed on the upper and lower portions of the shaft 500. In this case, the bearing B disposed in the housing 100 may be referred to as the first bearing or the lower bearing, and the bearing B disposed in the cover 200 may be referred to as the second bearing or the upper bearing.

[0066] The housing 100 can be formed into a cylindrical shape. The housing 100 can accommodate the stator 300, rotor 400, etc. In this case, the shape or material of the housing 100 can be changed in various ways. For example, the housing 100 can be formed of a metallic material that can withstand high temperatures.

[0067] The housing 100 may include a container portion capable of housing the bearing B in its lower portion. In this case, the container portion of the housing 100 may be referred to as the housing container portion.

[0068] The cover 200 can be disposed on the opening surface of the housing 100, that is, disposed on the housing 100 to cover the opening of the housing 100.

[0069] The cover 200 may include a container portion capable of accommodating the bearing B. In this case, the container portion of the cover 200 may be referred to as the cover container portion.

[0070] The stator 300 causes an electrical interaction with the rotor 400 to cause the rotor 400 to rotate.

[0071] The stator 300 can be disposed inside the housing 100. In this case, the stator 300 can be supported by the inner circumferential surface of the housing 100. Alternatively, the stator 300 can be disposed outside the rotor 400. That is, the rotor 400 can be rotatably disposed inside the stator 300.

[0072] Reference Figure 1 and Figure 2 The stator 300 may include a stator core 310, an insulator 320 disposed on the stator core 310, and a coil 330 wound around the insulator 320.

[0073] The coil 330 that generates the rotating magnetic field can be wound around the stator core 310. In this case, the stator core 310 can be formed as a single core or by connecting multiple separate cores.

[0074] The stator core 310 can be formed in the shape of multiple thin steel plates stacked on top of each other, but is not limited to this. For example, the stator core 310 can be formed as a single part.

[0075] The stator core 310 may include a yoke 311, a plurality of teeth 312, and pole shoes 313 formed on the inner ends of the teeth 312. In this case, when viewed from above, the inner surface of each pole shoe 313 may be formed parallel to a dashed line arranged perpendicular to the radial direction.

[0076] The yoke 311 can be formed into a cylindrical shape. Therefore, when viewed from above, the yoke 311 can include a cross-section with an annular shape.

[0077] Multiple teeth 312 can be arranged to be spaced apart from each other in the circumferential direction of the yoke 311. Therefore, slots can be formed between the teeth 312, which are spaces for winding the coil 330.

[0078] The pole shoe 313 can extend inward from the inner end of the tooth 312. In this case, the width of the pole shoe 313 can be greater than the width of the tooth 312.

[0079] The pole shoe 313 can be positioned opposite the magnet 420 of the rotor 400. In this case, the pole shoe 313 can be positioned radially spaced from the outer peripheral surface of the magnet 420 by a predetermined distance. In this case, this distance can be referred to as the air gap, and can be the radial distance between the pole shoe 313 and the magnet 420.

[0080] Insulator 320 insulates the stator core 310 from the coil 330. Therefore, insulator 320 can be disposed between the stator core 310 and the coil 330.

[0081] Accordingly, the coil 330 can be wound around the stator core 310 on which the insulator 320 is disposed.

[0082] The rotor 400 rotates due to its electrical interaction with the stator 300. In this case, the rotor 400 can be rotatably positioned relative to the stator 300.

[0083] The rotor 400 may include a rotor core 410 and a plurality of magnets 420 disposed outside the rotor core 410. Furthermore, the rotor 400 may include a can-shaped portion disposed outside the rotor core 410 and connected to the magnets 420 to prevent the magnets 420 from separating and to increase the connection force. In this case, the magnets 420 may be arranged on the rotor core 410 at predetermined intervals from each other in the circumferential direction relative to the center C.

[0084] The rotor core 410 can be formed into a shape in which multiple thin steel plates are stacked or into the shape of a drum.

[0085] In addition, a hole for connection with shaft 500 can be formed at the center C of rotor core 410.

[0086] The magnet 420 and the coil 330 wound around the stator core 310 of the stator 300 generate a rotating magnetic field.

[0087] Therefore, the rotor 400 rotates through the electrical interaction between the coil 330 and the magnet 420, and the shaft 500 rotates together with the rotor 400 to generate the driving force of the motor.

[0088] In this case, magnet 420 can be disposed outside rotor core 410 to realize a surface permanent magnet (SPM) type rotor.

[0089] The can-shaped portion protects the rotor core 410 and the magnet 420 from physical or chemical irritation. Furthermore, the can-shaped portion prevents the magnet 420 from separating from the rotor core 410. In this case, the can-shaped portion can be configured to cover the magnet 420 disposed on the rotor core 410.

[0090] The shaft 500 can be disposed inside the housing 100 so that it can rotate via the bearing b. The shaft 500 can rotate together with the rotor 400.

[0091] The shaft 500 can be press-fitted to a hole formed at the center of the rotor core 410.

[0092] Busbar 600 can be installed on stator 300, such as Figure 2 As shown in the diagram. Busbar 600 can be electrically connected to coil 330 of stator 300.

[0093] Figure 3 The illustration shows a perspective view of the busbar of the motor according to the first embodiment. Figure 4 This is a perspective view illustrating a plurality of busbar terminals disposed in a motor according to the first embodiment. Figure 5 This is a plan view illustrating a plurality of busbar terminals disposed in a busbar in a motor according to the first embodiment, and Figure 6 This is an unfolded view of the main body portion of the busbar terminal provided in the motor according to the first embodiment.

[0094] Reference Figures 3 to 5 The busbar 600 may include a busbar body 700 formed of insulating material and a plurality of busbar terminals 800 disposed on the busbar body 700.

[0095] The busbar body 700 can be a molded component formed by injection molding. Accordingly, the busbar body 700 can be injection molded to form a busbar 600 in which a plurality of busbar terminals 800 are arranged to be spaced apart from each other in the radial direction by a predetermined gap G.

[0096] Multiple busbar terminals 800 can be arranged to be spaced apart from each other in the radial direction. In addition, each busbar terminal 800 can be electrically connected to the coil 330 of the stator 300.

[0097] Busbar terminal 800 can be formed by connecting two separate parts. That is, busbar terminal 800 can be formed by connecting body portion 810 and power terminal portion 820. In this case, body portion 810 and power terminal portion 820 can be connected by welding.

[0098] Accordingly, since the busbar terminal 800 according to the embodiment is formed by cutting only the body portion 810, rather than cutting the body portion and the power terminal portion which are integrally formed on a plate member at the same time as a conventional busbar terminal, the amount of waste discarded due to cutting its structure can be minimized.

[0099] That is, in the busbar terminal 800 according to the embodiment, only the body portion 810 is formed from a plate member with a predetermined thickness, which minimizes the amount of waste discarded by cutting. For example, as Figure 6 As illustrated in the diagram, since the body portion 810 is formed with a predetermined width W1, the main portion can be formed by a main process of cutting only the area corresponding to the body portion 810 of a single plate member. Therefore, the amount of waste discarded during cutting can be minimized. Furthermore, this main portion can be bent to form the body portion 810 of the busbar terminal 800 disposed on the busbar 600.

[0100] Furthermore, since the busbar terminal 800 is formed by connecting the body portion 810 and the power terminal portion 820, which are to be separated into two components, electroplating can be performed on each of the body portion 810 and the power terminal portion 820.

[0101] In conventional busbar terminals, electroplating is performed using a rack plating method due to their complex structure. This increases production costs. In such cases, the rack plating method can be a method of suspending the target object on a fixture or hanger and then electroplating it.

[0102] However, in the busbar terminal 800, since the body portion 810 and the power terminal portion 820 are formed as separate components, the body portion 810 can be formed by cutting and bending a plate-shaped pre-plated component. Therefore, an electroplated layer can be formed on a portion of the surface of the body portion 810, and an electroplated layer may not be formed on the cut surface. For example, since the body portion 810 is formed by cutting a pre-plated plate-shaped component, an electroplated layer may not be formed on a portion of the surface. That is, since the body portion 810 is formed by molding a pre-plated plate component, the body portion 810 may include a non-electroplated surface on which no electroplating has been performed. In this case, the non-electroplated surface may be a cut surface formed by the cutting process of the body portion 810.

[0103] Furthermore, in the power terminal section 820, the plate-shaped component can be cut and bent, and the electroplating process can be performed separately by post-plating. In this case, in the power terminal section 820, the electroplating process can be performed by a barrel plating method that is low-cost and can plate multiple parts at once.

[0104] Therefore, in the busbar terminal 800, electroplating can be performed only on the entire surface of the power terminal portion 820 to be connected to the connector—through which external power is applied—and thus costs can be reduced, i.e., an electroplated layer can be formed on the entire surface of the power terminal portion 820. Furthermore, since the electroplating process is performed on multiple power terminal portions 820 by a barrel plating method, costs can be further reduced. In this case, the barrel plating method can be a method in which electroplating is performed after a large number of electroplating targets are placed in a barrel.

[0105] Reference Figure 5Multiple busbar terminals 800 can be configured to be spaced apart from each other by a predetermined gap G in the radial direction. Specifically, the body portions 810 of the multiple busbar terminals 800 can be configured to be spaced apart from each other by a predetermined gap G in the radial direction. In this case, a portion of the inner portion of the power terminal portion 820 can be configured to overlap with the gap G in the axial direction. However, the power terminal portion 820 can be coupled to the body portion 810 to be spaced apart from each other in the axial direction, such that the multiple busbar terminals 800 are physically and electrically separated from each other.

[0106] like Figure 5 As shown in the figure, the inner end portion of the power terminal portion 820 of any busbar terminal 800 arranged outward in the radial direction can be configured to overlap with the body portion 810 of another busbar terminal 800 arranged therein in the axial direction.

[0107] For example, the first busbar terminal, the second busbar terminal, and the third busbar terminal can be arranged to be radially spaced apart from each other relative to the center C. Furthermore, the inner end portion of the power terminal portion of the second busbar terminal can be arranged to overlap the body portion of the first busbar terminal in the axial direction. However, in the case of the busbar terminal according to the second embodiment described below, the thickness can be reduced when the protrusion formed in the body portion of the second busbar terminal is bent outward by a pressing process. In this case, the inner end portions of the body portion of the first busbar terminal and the power terminal portion of the second busbar terminal may not overlap in the axial direction.

[0108] According to the busbar terminal of the first example

[0109] Figure 7 This is a perspective view illustrating a first example of a busbar terminal disposed in a motor according to a first embodiment. Figure 8 This is an exploded perspective view illustrating a first example of a busbar terminal disposed in a motor according to a first embodiment. Figure 9 This is a plan view illustrating a first example of a busbar terminal disposed in a motor according to the first embodiment. Figure 10 This is a side view illustrating a first example of a busbar terminal disposed in a motor according to a first embodiment, and Figure 11 It is along Figure 9 A cross-sectional view of line BB.

[0110] Reference Figures 7 to 11The busbar terminal 800 includes a body portion 810 electrically connected to an end portion of the coil 330 and a power terminal portion 820 coupled to the body portion 810. In this case, the power terminal portion 820 can be electrically connected to a connector (not shown) for applying external power. Therefore, one side of the power terminal portion 820 can pass through the cover 200 and be exposed to the outside.

[0111] The body portion 810 may include a body 811, a terminal 812 connected to the coil 330, and a protrusion 813 projecting axially from the upper surface 811a of the body 811. In this case, the body portion 810 can be formed by cutting and bending the plate-like member. Therefore, the body 811, the terminal 812, and the protrusion 813 can be integrally formed. The protrusion 813 may be referred to as the first protrusion.

[0112] When viewed along the axial direction, the body 811 can be formed into an arc shape with a predetermined curvature. In this case, one surface of the body 811 can be formed into an arc surface with a predetermined curvature.

[0113] Terminal 812 can be formed as multiple terminals 812 on the body 811. For example... Figure 1 As shown in the diagram, the three terminals 812 can be arranged at equal intervals in the circumferential direction relative to the center C.

[0114] In this configuration, the terminals 812 can be formed into hooks for welding to the end of the coil 330. In this configuration, each terminal of the terminals 812 can be formed to protrude radially from the upper surface 811a of the body 811.

[0115] The protrusion 813 may be formed to extend axially from the upper surface 811a of the body 811, and the protrusion may contact one side of the power terminal portion 820. For example... Figure 9 As shown in the diagram, a portion of the inner surface 813a of the protrusion 813 can contact the protrusion 813. In this case, the portion of the inner surface 813a of the protrusion 813 that contacts one side of the power terminal portion 820 can be referred to as the contact surface or welding surface. Furthermore, considering the rigidity and process stability of the welding, the contact surface can be at least 1.5 times the thickness t of the body 811 in the radial direction.

[0116] The power terminal portion 820 can be formed by bending a plate-like component. In this case, one side of the power terminal portion 820 can be configured to contact the protrusion 813, and a component (not shown), such as a connector, can be attached to its other side to apply external power. Therefore, the power transmitted through the protrusion 813 can be transmitted to the coil 330 through the terminal 812.

[0117] Reference Figure 8 and Figure 11 The power terminal portion 820 may include a first region 821 in which one side contacts the protrusion 813, a second region 822 extending radially from the end portion of the first region 821, and a third region 823 extending axially from the end portion of the second region 822.

[0118] Taking into account the amount of contact with the protrusion 813 projecting axially from the body 811, the first region 821 can be formed into a plate shape arranged axially. Therefore, the outer surface 821a of the first region 821 can contact a portion of the inner surface 813a of the protrusion 813. Furthermore, the first region 821 and the protrusion 813 can be joined by a welding process. In this case, the first region 821 can be referred to as the lower end portion of the power terminal portion 820.

[0119] Reference Figure 11 The lower end of the first region 821 can be configured to be spaced apart from the upper surface 811a of the body 811 by a predetermined interval d in the axial direction. Therefore, it is possible to prevent any one of the power terminal portions 820 of the plurality of busbar terminals 800 from contacting another body portion 810.

[0120] The second region 822 can be configured to extend radially from the end portion of the first region 821.

[0121] The lower surface of the second region 822 can contact the upper surface of the protrusion 813. Therefore, the protrusion 813 can support the second region 822, and thus can increase the amount of contact between the body portion 810 and the power terminal portion 820.

[0122] In this case, an example is described where the lower surface of the second region 822 contacts the upper surface of the protrusion 813, but the invention is not limited thereto. For example, the lower surface of the second region 822 may be spaced apart from the upper surface of the protrusion 813, and in this case, a portion of the busbar body 700 may be disposed between the upper surface of the protrusion 813 and the second region 822. However, since the busbar body 700 has not yet been formed during the welding process, there is a possibility that the body portion 810 and the power terminal portion 820 may move relative to each other. Therefore, it is preferable that the upper surface of the protrusion 813 and the lower surface of the second region 822 are configured to contact each other.

[0123] The third region 823 can be configured to extend axially from the outer end portion of the second region 822. Furthermore, a component that applies external power, such as a connector, can be connected to the third region 823. In this case, the first region 821 can be referred to as the upper end portion of the power terminal portion 820.

[0124] Figure 12 This is a view illustrating a modified example of the body portion of the busbar terminal according to the first example, which is provided in the motor according to the first embodiment.

[0125] Reference Figure 12 The body portion 810 may also include a guide portion 814 for guiding the power terminal portion 820. In this case, the guide portion 814 prevents the power terminal portion 820 from moving during the welding process, thereby improving the accuracy of the connection position between the body portion 810 and the power terminal portion 820.

[0126] The guide portion 814 can be configured as two protrusions, which are spaced apart from each other in the circumferential direction on the upper surface of the protrusion 813. Therefore, the guide portion 814 can be referred to as a guide protrusion.

[0127] Each guide protrusion in the guide protrusion may be formed to protrude axially from the upper surface of the protrusion 813. The guide protrusion may be configured to face the side surface of the second region 822 in the circumferential direction.

[0128] According to the busbar terminal of the second example

[0129] Figure 13 This is a perspective view illustrating a second example of a busbar terminal disposed in a motor according to the first embodiment, and Figure 14 This is an exploded perspective view illustrating a second example of a busbar terminal disposed in a motor according to the first embodiment. Figure 15 This is a plan view illustrating a second example of a busbar terminal disposed in a motor according to the first embodiment, and Figure 16 This is a side view illustrating a second example of a busbar terminal disposed in a motor according to the first embodiment. Figure 17 It is along Figure 15 Cross-sectional view of line CC.

[0130] In reference Figures 13 to 17 When describing the busbar terminal 800a according to the second example, detailed descriptions of these components will be omitted since the same reference numerals can be assigned to the same components as those of the busbar terminal 800 according to the first example.

[0131] When comparing the busbar terminal 800 according to the first example with the busbar terminal 800a according to the second example, the difference lies in the shape between the protrusions connected to the power terminal portion 820. For example, considering the stability of the connection between the busbar terminals and the possibility of contact, the difference between the busbar terminal 800a according to the second example and the busbar terminal 800 according to the first example is that the busbar terminal 800a includes protrusions formed with a stepped structure.

[0132] Reference Figures 13 to 17 According to the second example, the busbar terminal 800a includes a body portion 810a electrically connected to an end portion of the coil 330 and a power terminal portion 820 connected to the body portion 810a. In this case, the body portion 810a may include a body 811, a terminal 812 connected to the coil 330, and a protrusion 815 projecting axially from the upper surface 811a of the body 811. The protrusion 815 may be referred to as a second protrusion.

[0133] When comparing the protrusion 815 with the protrusion 813 of the busbar terminal 800 according to the first example, the difference is that the upper portion is bent outward to form a stepped structure. That is, instead of the protrusion 813 of the busbar terminal 800 according to the first example, the protrusion 815 of the busbar terminal 800a according to the second example can be provided on the body 811.

[0134] Reference Figure 14 and Figure 17 The protrusion 815 may include a first protrusion 816 formed to extend axially from the upper surface 811a of the body 811 and a second protrusion 817 bent outward from the end portion of the first protrusion 816. Accordingly, the inner surface 816a of the first protrusion 816 and the inner surface 817a of the second protrusion may be configured to form an offset O in the radial direction. Furthermore, a stepped structure may be formed at the protrusion 815 due to this offset O.

[0135] The upper surface 816b of the first protrusion 816 can contact the lower surface of the first region 821 of the power terminal portion 820. Furthermore, the first protrusion 816 can support the lower end portion of the power terminal portion 820. Therefore, the power terminal portion 820 can be configured to be spaced axially from the upper surface 811a of the body 811 by a predetermined distance d.

[0136] The inner surface 817a of the second protrusion 817 can contact the outer surface 821a of the first region 821. Furthermore, the first region 821 and the protrusion 815 can be joined by a welding process. In this case, the inner surface 817a of the second protrusion 817 can be either the contact surface or the welding surface described above.

[0137] The upper surface 817b of the second protrusion 817 can contact the lower surface of the second region 822 of the power terminal portion 820. Furthermore, the second protrusion 817 can support the second region 822, and thus, the amount of contact between the body portion 810 and the power terminal portion 820 can be increased.

[0138] Meanwhile, the thickness t2 of the second protrusion 817 in the radial direction can be less than the thickness t1 of the first protrusion 816 in the radial direction. For example, the thickness t2 of the second protrusion 817 in the radial direction can be reduced by molding, such as pressing. Therefore, the ratio of the second protrusion 817 and the power terminal portion 820 in the radial direction can be reduced by welding, thereby reducing the possibility of contact with the other busbar terminal 800a.

[0139] Figure 18 This is a view illustrating a modified example of the body portion of the busbar terminal according to the second example, which is provided in the motor according to the first embodiment.

[0140] Reference Figure 18 The main body portion 810a may also include a guide portion 814 that guides the power terminal portion 820.

[0141] The guide portion 814 can be configured as two protrusions, which are spaced apart from each other in the circumferential direction on the upper surface 817b of the second protrusion portion 817. Therefore, the guide portion 814 can be referred to as a guide protrusion.

[0142] Each of the guide protrusions can be formed to protrude axially from the upper surface 817b of the second protrusion 817. The guide protrusions can be configured to face the side surface of the second region 822 in the circumferential direction.

[0143] According to the busbar terminal in the third example

[0144] Figure 19 This is a perspective view illustrating a third example of a busbar terminal disposed in a motor according to the first embodiment, and Figure 20 This is an exploded perspective view illustrating a third example of a busbar terminal disposed in a motor according to the first embodiment. Figure 21 This is a plan view illustrating a third example of a busbar terminal disposed in a motor according to the first embodiment, and Figure 22 This is a side view illustrating a third example of a busbar terminal disposed in a motor according to the first embodiment. Figure 23 It is along Figure 21 The cross-sectional view of the DD line, and Figure 24This is a view illustrating the power supply terminal portion of the busbar terminal according to the third example, which is provided in the motor according to the first embodiment.

[0145] In reference Figures 19 to 24 When describing the busbar terminal 800b according to the third example, detailed descriptions of these components will be omitted since the same reference numerals can be assigned to the same components as those of the busbar terminal 800 according to the first example.

[0146] When comparing the busbar terminal 800 according to the first example with the busbar terminal 800b according to the third example, the difference lies in the shape between the power terminal portions connected to the body portion 810. For example, considering the stability of the connection made by welding, the difference is that the power terminal portion 820a of the busbar terminal 800b according to the third example includes a raised structure.

[0147] Reference Figures 19 to 24 According to the third example, the busbar terminal 800b includes a body portion 810 electrically connected to an end portion of the coil 330 and a power terminal portion 820a connected to the body portion 810.

[0148] In this case, the power terminal portion 820a includes a first region 821, a second region 822 extending radially from the end portion of the first region 821, a third region 823 extending axially from the end portion of the second region 822, and a protrusion 824 formed to protrude radially from the outer surface 821a of the first region 821.

[0149] The protrusion 824 may be formed to protrude toward the protrusion 813 in a radial direction. The protrusion 824 may be configured to contact the inner surface 813a of the protrusion 813.

[0150] The protrusion 824 can be formed by molding by pressing the inner surface of the first region 821 to make a portion of the outer surface 821a protrude.

[0151] like Figure 24 As shown in the diagram, the protrusion 824 can be formed into a hemispherical shape. Accordingly, the protrusion 824 can make point contact with the inner surface 813a of the protrusion 813. Consequently, during the welding process, since the current density at the contact point P between the protrusion 813 and the protrusion 824 increases, and the welding process starts from the contact point P, the fixing force between the body portion 810 and the power terminal portion 820a is increased.

[0152] In describing the bus terminal 800b according to the third example, the bus terminal 800b according to the third example has been described based on the body portion 810 of the bus terminal 800 according to the first example, but not necessarily limited thereto. For example, the body portion 810a of the bus terminal 800a according to the second example can be used instead of the body portion 810 of the bus terminal 800 according to the first example.

[0153] The sensor component 900 can detect the rotation of the shaft 500 by detecting the magnetic force of a sensing magnet mounted to operate in conjunction with the rotation of the rotor 400 to determine the current position of the rotor 400.

[0154] The sensor component 900 may include a sensing magnet assembly 910 and a printed circuit board (PCB) 920.

[0155] The sensing magnet assembly 910 is coupled to the shaft 500 to operate together with the rotor 400 to detect the position of the rotor 400. In this case, the sensing magnet assembly 910 may include a sensing magnet and a sensing plate.

[0156] The sensing magnet may include a main magnet arranged adjacent to a hole formed on the inner circumferential surface in the circumferential direction and a sub-magnet formed at the edge.

[0157] The main magnet can be set up in the same way as the drive magnet in the rotor 400 of the inserted motor.

[0158] Sub-magnets can be further subdivided and formed with many magnetic poles than the main magnet. Accordingly, sub-magnets allow for more precise division and measurement of rotation angles and smoother motor drive.

[0159] The sensing plate can be formed from a metal material with a disk shape. A sensing magnet can be attached to the upper surface of the sensing plate. Furthermore, the sensing plate can be attached to a shaft 500. In this case, a hole can be formed in the sensing plate for the shaft 500 to pass through.

[0160] On PCB 920, a sensor can be installed to detect the magnetic force of a sensing magnet. In this case, the sensor can be configured as a Hall integrated circuit (IC). Furthermore, the sensor can detect changes in the N and S poles of the sensing magnet to generate a sensing signal. Therefore, PCB 920 with a Hall integrated circuit can be referred to as a sensing component or a position detection device.

[0161] Second Implementation Method

[0162] The direction parallel to the longitudinal direction (vertical direction) of the axis will be called the axial direction, the direction perpendicular to the axial direction will be called the radial direction relative to the axis, and the direction along a circle with a radius in the radial direction will be called the circumferential direction relative to the axis.

[0163] The motor according to the second embodiment may include a housing 100, a cover 200, a stator 300, a rotor 400, a shaft 500, a busbar 600, etc. In this case, the shaft 500 may be formed of a hollow component.

[0164] According to the second embodiment, the busbar 600 of the motor may include a busbar retainer 1700 and a busbar terminal 1800.

[0165] Busbar retainer 1700 supports busbar terminal 1800. Busbar retainer 1700 may be an annular member including busbar terminal 1800. In this case, busbar retainer 1700 is a component corresponding to the busbar body of the motor according to the first embodiment, and may be referred to as busbar body.

[0166] Busbar terminal 1800 can be disposed on stator 300. Busbar terminal 1800 is electrically connected to coil 330. In addition, busbar terminal 1800 can be connected to an external power supply.

[0167] Figure 25 This is a view illustrating the busbar terminal and busbar retainer of the motor according to the second embodiment. Figure 26 The diagram illustrates a plan view of the busbar terminal of a motor according to the second embodiment, and Figure 27 This is a plan view illustrating a busbar having an overlapping area of ​​busbar terminals of a motor according to the second embodiment.

[0168] Reference Figure 25 and Figure 26 Busbar terminal 1800 is disposed inside busbar holder 1700. Furthermore, one end portion of busbar terminal 1800 is exposed on the outer surface of busbar holder 1700 for connection to coil 330. The area of ​​one end portion of busbar terminal 1800 in contact with coil 330 may be uniformly exposed radially on the outer peripheral surface of busbar holder 1700. The other end portion of busbar terminal 1800 may be exposed on the upper surface of busbar holder 1700 for connection to an external power source.

[0169] Multiple busbar terminals 1800 can be divided into a first group G1, a second group G2, and a neutral busbar 1800N. The first group G1 and the second group G2 may include busbar terminals 1800 connected to the U-phase, V-phase, and W-phase power supplies. The first group G1 and the second group G2 can be electrically isolated. The coil 330 contacting the busbar terminals 1800 of the first group G1 and the coil 330 contacting the busbar terminals 1800 of the second group G2 can be electrically isolated.

[0170] The first group G1 may include a first busbar terminal 1800A, a second busbar terminal 1800B, and a third busbar terminal 1800C. The first busbar terminal 1800A, the second busbar terminal 1800B, and the third busbar terminal 1800C can be connected to the U-phase, V-phase, and W-phase power supplies, respectively. Furthermore, the second group G2 may include a fourth busbar terminal 1800D, a fifth busbar terminal 1800E, and a sixth busbar terminal 1800F. The fourth busbar terminal 1800D, the fifth busbar terminal 1800E, and the sixth busbar terminal 1800F can be connected to the U-phase, V-phase, and W-phase power supplies, respectively.

[0171] The first group G1 and the second group G2 can be set up separately in space.

[0172] In the following text, the features of the busbar terminal 1800 corresponding to the common features of the busbar terminals 1800 of the first group G1 and the second group G2 will be described.

[0173] Figure 28 It's a diagram. Figure 26 The diagram shows an exploded view of busbar terminal 1800, and... Figure 29 It is a perspective view illustrating the assembled busbar terminals.

[0174] Reference Figure 28 and Figure 29 The busbar terminal 1800 may include a first body 1810 and a second body 1820. The first body 1810 and the second body 1820 may be separate components, and the first body 1810 may be mechanically connected to the second body 1820, or the first body 1810 may be soldered to the second body 1820. In this case, the first body 1810 may be a component corresponding to the power terminal portion 820 of the motor according to the first embodiment, and the second body 1820 may be a component corresponding to the body portion 810 of the motor according to the first embodiment. Therefore, the first body 1810 may be referred to as the power terminal portion, and the second body 1820 may be referred to as the body portion.

[0175] The first body 1810 may be a straight strip-shaped member. One end portion of the first body 1810 may be connected to an external power source, and the other end portion of the first body may be welded to the second body 1820. The first body 1810 may contact and be welded to either of the two bent end portions of the second body 1820.

[0176] The second body 1820 may be a strip-shaped member with a repeating uneven pattern. The second body 1820 includes a bent portion 1821 constituting the body of the busbar terminal 1800 and an end portion 1822 connected to the coil 330. Each end portion 1822 can be formed by bending both ends of the bent portion 1821 outwards. The end 1822a of the end portion 1822 is bent into a loop shape, and the end portion of the coil 330 is positioned therein. All shapes and dimensions of the second bodies 1820 of the busbar terminals 1800 provided in the first group G1 and the second group G2 may be identical.

[0177] The first body 1810 can be twisted and connected to the second body 1820. This is because the direction in which one end portion 1811 is connected to an external power source is different from the direction in which the other end portion 1812 is welded to the second body 1820, and therefore the first body 1810 can be twisted and configured to match that direction.

[0178] When considering the difference in angle between the direction in which one end portion 1811 is connected to an external power source and the direction in which the other end portion 1812 is welded to the second body 1820, the twist angle of the first body 1810 can be set. All twist angles of the first body 1810 of the busbar terminal 1800 can be the same, but the invention is not limited to this, and when considering the direction in which one end portion 1811 of the first body 1810 is connected to an external power source or the direction in which the other end portion 1812 is welded to the first body 1810, first bodies 1810 with different twist angles can also be provided. Since the first body 1810 does not have the bending area described above, its advantage is that the bending process can be omitted, and its advantage is that it has a shape that can greatly reduce the amount of waste to be discarded.

[0179] Meanwhile, the twisting direction of the first body 1810 of the busbar terminal 1800 provided in the first group G1 can be the same. The twisting direction of the first body 1810 of the busbar terminal 1800 provided in the second group G2 can also be the same. On the other hand, the twisting direction of the second body 1820 of the busbar terminal 1800 provided in the first group G1 can be different from the twisting direction of the second body 1820 of the busbar terminal 1800 provided in the second group G2.

[0180] Figure 30 It's a diagram. Figure 26 The diagram shows an exploded view of a busbar terminal 1800 including a first body 1810 having a bent shape, and... Figure 31 This is a perspective view of the assembled busbar terminal 1800, which is... Figure 30 Busbar terminal 1800.

[0181] Referring to 30 and 31, in some of the multiple busbar terminals 1800, the first body 1810 can be formed in a bent shape instead of a twisted shape. Therefore, busbar terminals 1800 with a twisted first body 1810 and busbar terminals 1800 with a bent first body 1810 can be combined. Taking into account the difference in angle between the direction in which one end portion 1811 is connected to an external power source and the direction in which the other end portion 1812 is welded to the first body 1810, the bending direction and the number of bends of the first body 1810 can be set.

[0182] Reference Figures 26 to 31 Each of the first bus terminal 1800A and the second bus terminal 1800B may have a twisted first body 1810. Furthermore, each of the fourth bus terminal 1800D, the fifth bus terminal 1800E, and the sixth bus terminal 1800F may also have a twisted first body 1810. However, the third bus terminal 1800C may have a bent first body 1810, unlike the other bus terminals.

[0183] At the same time, such as Figure 26 As illustrated in the diagram, the busbar terminals 1800 of the first group G1 can be configured such that the curvature center CA of the first busbar terminal 1800A, the curvature center CB of the second busbar terminal 1800B, and the curvature center CC of the third busbar terminal 1800C are different. However, when the busbar terminals 1800 are viewed in the axial direction, the second body 1820 of the first group G1 can be configured to be helical so that the end portion 1822a of the end portion that contacts the coil 330 is positioned identically in the radial direction.

[0184] Therefore, as Figure 27As illustrated in the diagram, in the axial direction of shaft 500, the end portion 1822 of the second bus terminal 1800B and the first body 1810 of the first bus terminal 1800A can form an overlapping area O1. Furthermore, the end portion 1822 of the third bus terminal 1800C and the second body 1820 of the first bus terminal 1800A can form an overlapping area O2, and the end portion 1822 of the third bus terminal 1800C and the second body 1820 of the second bus terminal 1800B can also form an overlapping area O2. Based on the second body 1820 of the second bus terminal 1800B, the first bus terminal 1800A can be located at the outermost portion, the third bus terminal 1800C can be located at the innermost portion, and the second bus terminal 1800B can be located radially between the first bus terminal 1800A and the third bus terminal 1800C.

[0185] On the other hand, such as Figure 26 As illustrated in the diagram, the busbar terminals 1800 of the second group G2 can be configured such that the curvature centers CD of the fourth busbar terminal 1800D, CE of the fifth busbar terminal 1800E, and CF of the sixth busbar terminal 1800F are different. When the busbar terminals 1800 are viewed axially, the second body 1820 of the second group G2 can be configured as a spiral shape to allow the end portion 1822a of its contact with the coil 330 to be positioned identically in the radial direction. In the axial direction of the shaft 500, the end portion 1822a of the fifth busbar terminal 1800E and the first body 1810 of the fourth busbar terminal 1800D can form an overlapping area O1. Furthermore, the end portion 1822 of the sixth bus terminal 1800F and the second body 1820 of the fourth bus terminal 1800D can form an overlapping area O2, and the end portion 1822 of the sixth bus terminal 1800F and the second body 1820 of the fifth bus terminal 1800E can also form an overlapping area O2. Based on the second body 1820, the fourth bus terminal 1800D can be located at the outermost position, the sixth bus terminal 1800F can be located at the innermost position, and the fifth bus terminal 1800E can be located radially between the fourth bus terminal 1800D and the sixth bus terminal 1800F.

[0186] Figure 32 This is an unfolded view of the plate component that forms the second body 1820 of the busbar terminal 1800.

[0187] Reference Figure 32The second body 1820 of the busbar terminal 1800 is manufactured by pressing the plate member 10 according to the unfolded pattern. In the region of the plate member 10, the region having a repeating strip shape with an uneven shape is the first region 11 for forming the second body 1820 of the busbar terminal 1800, and the remaining region S is the region to be discarded as waste. Because the plate member 10 includes a pattern in which unfolded shapes of a predetermined width are formed in an orderly manner, and there are no structures branching from the first region 11 or protruding structures for bending, the width L1 of the plate member 10 can be greatly reduced. Therefore, there is the advantage of not only reducing the size of the plate member 10, but also greatly reducing the amount of waste to be discarded.

[0188] Figure 33 This is an unfolded view of the plate member 20 that forms the first body 1810 of the busbar terminal 1800.

[0189] Reference Figure 33 The plate member 20 forming the first body 1810 can be a plate member 20 cut to correspond to the size of the first body 1810, and this plate member does not require an additional unfolded pattern. The width L2 of the plate member 20 can be the same as the width of the first body 1810. Therefore, no waste material to be discarded can be generated during the manufacture of the first body 1810.

[0190] Figure 34 This is an enlarged plan view illustrating the cross-sectional shape of the busbar terminal 1800.

[0191] Reference Figure 34 The second body 1820 of the busbar terminal 1800 can be configured such that the width SW in the axial direction is greater than the width RW3 in the axial direction. That is, the busbar terminal 1800 can be configured such that the second body 1820 is upright. In the twisted first body 1810, the cross-section of one end portion 1811 connected to the external power supply can be formed such that the width CW1 in the circumferential direction is greater than the width RW1 in the radial direction. On the other hand, in the twisted first body 1810, the cross-section of the other end portion 1812 welded to the first body 1810 can be formed such that the width CW2 in the circumferential direction is less than the width RW2 in the radial direction.

[0192] The third busbar terminal 1800C includes a first body 1810 having a bent shape. In the third busbar terminal 1800C, the cross-section of one end portion 1811 connected to an external power source may be spaced apart from the cross-section of another end portion 1812 welded to the first body 1810.

[0193] The above embodiments describe an example of an internal rotor type motor, but the invention is not limited thereto. The invention can also be applied to external rotor type motors. Furthermore, the invention can be used in various devices, such as vehicles or household appliances.

[0194] Figure Labels

[0195] 100: Housing; 200: Cover; 300: Stator; 400: Rotor; 500: Shaft; 600: Busbar; 700: Busbar body; 800: Busbar terminal; 810: Body portion; 811: Body; 812: Terminal; 813, 815: Protrusion; 814: Guide portion; 820: Power terminal portion; 824: Protrusion; 900: Sensor component; 1800A: First busbar terminal; 1800B: Second busbar terminal; 1800C: Third busbar terminal; 1800D: Fourth busbar terminal; 1800E: Fifth busbar terminal; 1800F: Sixth busbar terminal; 1810: First body; 1820: Second body

Claims

1. A motor, comprising: stator; A rotor, the rotor being configured to correspond to the stator; A shaft, which is connected to the rotor; as well as Busbar, the busbar being disposed above the stator; The busbar includes a busbar body and a plurality of busbar terminals disposed on the busbar body. Each of the busbar terminals includes a body portion and a power terminal portion connected to the body portion. The body portion includes a body, a plurality of terminals disposed on the body, and a protrusion extending axially from the upper surface of the body. One lower surface of the power terminal portion contacts the inner surface of the protrusion. The body portions of the plurality of busbar terminals are configured to be radially spaced apart from each other by a predetermined gap (G). A portion of the internal part of the power terminal section overlaps with the gap (G) in the axial direction. The protrusion also includes a guide portion for guiding the power terminal portion, and The power terminal portion guided by the guide portion is connected to the protrusion through a welding process.

2. The motor according to claim 1, wherein, The lower end of the power terminal portion is configured to be spaced apart from the upper surface of the body by a predetermined interval (d) in the axial direction.

3. The motor according to claim 2, wherein, The power terminal portion includes: A first region is configured to be separated from the upper surface of the body by the predetermined interval (d). A second region, the second region extending radially from the end portion of the first region; and A third region extends from the end portion of the second region along the axial direction. Wherein, the outer surface of the first region contacts the inner surface of the protrusion, and The lower surface of the second region contacts the upper surface of the protrusion.

4. The motor according to claim 2, wherein, The power terminal portion includes: A first region is configured to be separated from the predetermined interval (d) by the upper surface of the body. A second region extends radially from the end portion of the first region; A third region, the third region extending from the end portion of the second region along the axial direction; and A protrusion that extends from the outer surface of the first region. Wherein, the protrusion contacts the inner surface of the projection, and The lower surface of the second region contacts the upper surface of the protrusion.

5. The motor according to claim 4, wherein, The protrusion is formed in a hemispherical shape and makes point contact with the inner surface of the protrusion.

6. The motor according to claim 2, wherein: The protrusion includes a first protruding portion formed to extend from the upper surface of the body along the axial direction and a second protruding portion extending from the end portion of the first protruding portion and bending outward; The power terminal portion includes: a first region disposed away from the upper surface of the body and spaced apart by the predetermined interval (d); a second region extending radially from an end portion of the first region; and a third region extending axially from an end portion of the second region; and The inner surface of the second protrusion contacts the outer surface of the first region.

7. The motor according to claim 2, wherein: The protrusion includes a first protruding portion formed to extend from the upper surface of the body along the axial direction and a second protruding portion extending from the end portion of the first protruding portion to bend outward; The power terminal portion includes: a first region disposed at a predetermined interval (d) away from the upper surface of the body; a second region extending radially from an end portion of the first region; a third region extending axially from an end portion of the second region; and a protrusion protruding from the outer surface of the first region. and The protrusion contacts the inner surface of the second protruding portion.

8. The motor according to claim 7, wherein, The protrusion is formed in a hemispherical shape and makes point contact with the inner surface of the second protrusion.

9. The motor according to claim 6 or 7, wherein, The thickness (t2) of the second protrusion in the radial direction is less than the thickness (t1) of the first protrusion in the radial direction.

10. The motor according to claim 1, wherein, The guide portion is configured as two protrusions spaced apart from each other in the circumferential direction, disposed on the upper surface of the protrusion.

11. A motor, comprising: axis; Rotor, the rotor being connected to the shaft; as well as Stator, the stator being configured to correspond to the rotor, The stator includes a stator core, an insulator connected to the stator core, and coils disposed on the insulator. The busbar includes a plurality of busbar terminals electrically connected to the coil and a busbar holder supporting the busbar terminals. Each of the plurality of busbar terminals includes a first body and a second body connected to the first body. In at least some of the plurality of busbar terminals, the first body is twisted and connected to the second body, and In at least some of the plurality of busbar terminals, the curvature center of the second body is different.

12. The motor according to claim 11, wherein, The first body to be twisted and connected to the second body is connected to the second body such that the width of the cross section of one end portion in the circumferential direction is greater than the width of the cross section in the radial direction, and the width of the cross section of the other end portion in the circumferential direction is less than the width of the cross section in the radial direction.

13. The motor according to claim 11, wherein, The second body is configured such that its width in the axial direction is greater than its width in the radial direction.

14. The motor according to claim 11, wherein: The second body is formed of a strip-shaped member in which an uneven pattern is continuously repeated; and The end portion of the second body connected to the coil is formed by bending the two ends of the strip member.

15. The motor according to claim 11, wherein: All the shapes of the second bodies of the plurality of busbar terminals are identical; and Some of the first bodies of the plurality of busbar terminals are twisted and connected to the second body; and The remaining first bodies of the first bodies of the plurality of busbar terminals are bent and connected to the second body.

16. The motor according to claim 15, wherein, The portion of the busbar terminal in which the first body is bent and connected to the second body is configured to overlap the busbar terminal in which the first body is twisted and connected to the second body in the axial direction relative to the shaft.

17. The motor according to claim 11, wherein: The plurality of busbar terminals include: The first group includes a first busbar terminal, a second busbar terminal, and a third busbar terminal; and The second group includes a fourth busbar terminal, a fifth busbar terminal, and a sixth busbar terminal; The first group and the second group are configured to be electrically separated.

18. The motor according to claim 17, wherein, The twisting direction of the second body in the first group is different from that of the twisting direction of the second body in the second group in the axial direction relative to the axis.

19. The motor according to claim 18, wherein: A portion of the second busbar terminal is configured to overlap the first busbar terminal in the axial direction relative to the axis; A portion of the third busbar terminal is configured to overlap with the first busbar terminal and the second busbar terminal in the axial direction relative to the shaft; A portion of the fifth busbar terminal is configured to overlap the fourth busbar terminal in the axial direction relative to the shaft; and A portion of the sixth bus terminal is configured to overlap with the fourth and fifth bus terminals in the axial direction relative to the shaft.

Images