Motor

Abstract

The present invention provides a motor comprising: a shaft; a rotor coupled to the shaft; and a stator disposed corresponding to the rotor; wherein the stator comprises a stator core, an insulator coupled to the stator core, and a coil disposed on the insulator, and comprises a busbar electrically connected to the coil and a busbar holder supporting the busbar, wherein the busbar comprises a first terminal and a second terminal connected to the first terminal, wherein the first terminal comprises a first emboss and a second emboss, and the second terminal comprises a first part in contact with the first emboss and a second part in contact with the second emboss.

Description

Technology Field

[0001] The present invention relates to a motor. Background Technology

[0002] A motor includes a rotor and a stator. The rotor rotates due to the electrical interaction between the rotor and the stator. Additionally, the motor includes a busbar electrically connected to a coil wound on the stator.

[0003] Generally, busbar terminals are connected by fusing. Consequently, equipment for the fusing process is required, which leads to a problem of high manufacturing costs. The problem to be solved

[0004] The present invention aims to provide a motor with busbar terminals connected without fusing. means of solving the problem

[0005] An embodiment provides a motor comprising: a shaft; a rotor coupled to the shaft; and a stator disposed corresponding to the rotor; wherein the stator comprises a stator core, an insulator coupled to the stator core, and a coil disposed on the insulator, and comprises a busbar electrically connected to the coil and a busbar holder supporting the busbar, wherein the busbar comprises a first terminal and a second terminal connected to the first terminal, wherein the first terminal comprises a first emboss and a second emboss, and the second terminal comprises a first part in contact with the first emboss and a second part in contact with the second emboss. Effects of the invention

[0006] According to an embodiment, terminals can be connected without fusing by utilizing an embossing formed on a busbar terminal. Accordingly, this can have the effect of simplifying the manufacturing process and reducing the cost required for the fusing process. Brief explanation of the drawing

[0007] FIG. 1 is a cross-sectional view of a motor according to an embodiment of the present invention. FIG. 2 is a drawing showing a part of a busbar included in a motor according to an embodiment of the present invention. FIG. 3 is a drawing showing a part of a busbar holder and a first terminal included in a motor according to an embodiment of the present invention. FIG. 4 is a drawing showing a part of a first terminal according to an embodiment of the present invention. FIG. 5 is a drawing showing a part of a second terminal included in a motor according to an embodiment of the present invention. FIG. 6 to 8 are drawings showing the state in which a second terminal is inserted between a first part and a second part included in a motor according to an embodiment of the present invention. Specific details for implementing the invention

[0008] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0009] The direction parallel to the length direction (up and down direction) of the shaft is called the axial direction, the direction perpendicular to the axial direction with respect to the shaft is called the radial direction, and the direction following a circle with a radius in the radial direction with respect to the shaft is called the circumferential direction.

[0010] FIG. 1 is a cross-sectional view of a motor according to one embodiment of the present invention.

[0011] Referring to FIG. 1, the motor may include a shaft (100), a rotor (200), a stator (300), a bus bar (400), and a housing (500).

[0012] Hereinafter, "inner side" refers to the direction from the housing (500) toward the shaft (100), which is the center of the motor, and "outer side" refers to the opposite direction of the inner side, which is the direction from the shaft (100) toward the housing (500).

[0013] The shaft (100) can be coupled to the rotor (200). When an electromagnetic interaction occurs between the rotor (200) and the stator (300) through the supply of current, the rotor (200) rotates and the shaft (100) rotates in conjunction with it. The shaft (100) can be connected to the steering system of the vehicle to transmit power.

[0014] The rotor (200) rotates through electrical interaction with the stator (300). The rotor (200) may be positioned inside the stator (300). The rotor (200) may include a rotor core and a rotor magnet positioned in the rotor core.

[0015] The stator (300) is positioned on the outside of the rotor (200). The stator (300) may include a stator core (310), a coil (320), and an insulator (330) mounted on the stator core (310). The coil (320) may be wound around the insulator (330). The insulator (330) is positioned between the coil (320) and the stator core (310). The coil causes electrical interaction with the rotor magnet.

[0016] The busbar (400) is positioned on the upper side of the stator (300). The busbar (400) connects the coils (320) wound on the stator (300).

[0017] The housing (500) may be positioned on the outside of the stator (300). The housing (500) may be a cylindrical member with one side open. The shape and material of the housing (500) may vary, but a metal material capable of withstanding high temperatures may be selected.

[0018] FIG. 2 is a drawing showing a part of a bus bar included in a motor according to an embodiment of the present invention.

[0019] Referring to FIG. 2, the busbar (400) may include a first terminal (410), a second terminal (420), and a busbar holder (430).

[0020] The first terminal (410) can be connected to a power source. The first terminal (410) can be connected to each phase (U, V, W) of a three-phase power source. One end of the first terminal (410) can be exposed from the busbar holder (430). The other end of the first terminal (410) can be bent into a U-shape to form a gap. The gap can have a predetermined width in the first direction.

[0021] The second terminal (420) can be connected to a coil (320 shown in FIG. 1). Also, the second terminal (420) can be in contact with the first terminal (410). At this time, one end of the second terminal (420) can be inserted into a gap formed in the first terminal (410).

[0022] The busbar holder (430) may be an annular member. The busbar holder (430) may be a molded member formed through injection molding. A plurality of first terminals (410) and a plurality of second terminals (420) may be disposed on the busbar holder (430).

[0023] FIG. 3 is a drawing showing a part of a busbar holder and a first terminal included in a motor according to one embodiment of the present invention, and FIG. 4 is a drawing showing a part of a first terminal according to one embodiment of the present invention.

[0024] Referring to FIGS. 3 and 4, the first terminal (410) can be placed on the busbar holder (430).

[0025] The first terminal (410) may include a first part (411), a second part (412), and a third part (413). The first part (411) may be positioned on one side of the busbar holder (430). The first part (411) may include at least one first emboss (4111). Although the drawing shows only one first emboss (4111), there may be multiple first emboss (4111). The first emboss (4111) may have a shape protruding toward the second part (412). Also, the first part (411) may include a first surface (4112). The first surface (4112) may be positioned toward the first part (411).

[0026] The second part (412) may be spaced apart from the first part (411) in a first direction. The second part (412) may include at least one second emboss (4121). Although the drawing shows only one second emboss (4121), there may be multiple second emboss (4121). The second emboss (4121) may have a shape protruding toward the first part (411). The second emboss (4121) may overlap with the first surface (4112) in a first direction. Additionally, the second part (412) may include a second surface (4122). The second surface (4112) may be positioned toward the first part (411). At least a portion of the second surface (4122) overlaps with the first emboss (4111) in the first direction, and another portion of the second surface (4122) may overlap with the first surface (4112) in the first direction.

[0027] The third part (413) can connect the first part (411) and the second part (412). The third part (413) may have a bent shape. The first part (411), the second part (412), and the third part (413) may be formed by banding a single member into a U-shape.

[0028] The first terminal (410) may include an opening (414). The opening (414) may be positioned at the ends of the first part (411) and the second part (412). At this time, the second terminal (420 shown in FIG. 2) may be inserted between the first part (411) and the second part (412) through the opening (414). At this time, the first part (411) and the second part (412) may be separated by a separation distance (D) in the first direction. Here, the separation distance (D) may be the straight distance in the first direction between the first surface (4112) and the second surface (4122). At this time, the separation distance (D) between the first part and the second part may change elastically by an external force. That is, the width of the opening (414) in the first direction may change elastically by an external force.

[0029] The first emboss (4111) and the second emboss (4121) may not overlap in the first direction and the second direction. In this case, the distance (D1) between the first emboss (4111) and the second surface (4122) may be smaller than the separation distance (D) between the first surface (4112) and the second surface (4122). Also, the distance (D2) between the second emboss (4121) and the first surface (4122) may be smaller than the separation distance (D) between the first surface (4112) and the second surface (4122). In this case, the distance (D1) between the first emboss (4111) and the second surface (4122) and the distance (D2) between the second emboss (4121) and the first surface (4122) may be equal to or smaller than the thickness in the first direction of the second terminal (420) to be described later.

[0030] The first emboss (4111) and the second emboss (4121) may each have a second direction width (W1, W2) greater than the first direction thickness (T1, T2). The second direction width (W1) of the first emboss (4111) may be smaller than half the second direction length of the first part (411). Additionally, the second direction width (W2) of the second emboss (4121) may be smaller than half the second direction length of the second part (412). Furthermore, the first direction thickness (T1) of the first emboss (4111) may be smaller than half the separation distance (D) between the first surface (4112) and the second surface (4122). Additionally, the first direction thickness (T2) of the second emboss (4121) may be smaller than half the distance (D) between the first surface (4112) and the second surface (4122).

[0031] The first emboss (4111) may include a first round portion (411R). The first round portion (411R) may be positioned toward the opening (414). The first round portion (411R) may be positioned at the edge of the first emboss (4111). The first round portion (411R) may include a curved surface. Additionally, the second emboss (4121) may include a second round portion (412R). The second round portion (412R) may be positioned toward the opening (414). The second round portion (412R) may be positioned at the edge of the second emboss (4121). The second round portion (412R) may include a curved surface. In this case, the second round portion (412R) may be positioned closer to the opening (414) than the first round portion (411R).

[0032] FIG. 5 is a drawing showing a part of a second terminal included in a motor according to one embodiment of the present invention.

[0033] Referring to FIG. 5, the second terminal (420) may include a first part (421), a second part (422), and a third part (423).

[0034] The first part (421) may be extended in a second direction. The first part (421) may include a first contact surface (4211) that contacts the first emboss (4111). At this time, the thickness (T3) of the first part (421) in the first direction may be equal to or greater than the distance (D1) between the first emboss (4111) and the second surface (4122) shown in FIG. 5.

[0035] The second part (422) may be positioned in a second direction with respect to the first part (421). The second part (422) may be spaced apart from the first part (421). Additionally, the second part (422) may include a second contact surface (4221) that contacts the second emboss (4121). The first contact surface (4211) and the second contact surface (4221) may be positioned facing different directions. The first contact surface (4211) and the second contact surface (4221) may not overlap in the second direction. The thickness (T4) of the second part (422) in the first direction may be equal to or greater than the distance (D2) between the second emboss (4121) and the first surface (4112) shown in FIG. 5. The first direction thickness (T4) of the second part (422) may be the same as the first direction thickness (T3) of the first part (421).

[0036] The third part (423) can connect the first part (421) and the second part (422). The third part (423) can be positioned at an angle with respect to the second direction. The first direction length (L3) of the third part (423) may be greater than the first direction thickness (T3) of the first part (421) or the first direction thickness (T4) of the second part (422).

[0037] The second terminal (420) may include a first region (420R1) and a second region (420R2). The first region (420R1) and the second region (420R2) may be placed at the end of the first part (421). At this time, the first region (420R1) may include a curved surface or an inclined surface corresponding to the curved surface of the first rounded portion (411R) shown in FIG. 5. And, the second region (420R2) may include a curved surface or an inclined surface corresponding to the curved surface of the second rounded portion (412R). At this time, while the second terminal (420) is inserted between the first part (411) and the second part (412), the first region (420R1) may slide along the curved surface of the first rounded portion (411R). And, the second region (420R2) may slide along the curved surface of the second rounded portion (412R). Accordingly, the phenomenon of the end of the second terminal (420) getting caught on the first embo (4111) and the second embo (4121) can be prevented.

[0038] FIGS. 6 to 8 are drawings illustrating a state in which a second terminal is inserted between a first part and a second part included in a motor according to an embodiment of the present invention.

[0039] Referring to FIG. 6, the second terminal (420) can be inserted between the first part (411) and the second part (412) through the opening (414). The second terminal (420) can be moved in a second direction. The end of the second terminal (420) can pass through the opening (414) and come into contact with the second embo (4121). At this time, the end of the second terminal (420) can come into contact with the second embo (4121) before the first embo (4111). The second region (420R2) of the second terminal (420) can come into contact with the second round part (412R). At this time, the first region (420R2) can move along the curvature of the second round part (412R) and slide between the second embo (4121) and the first surface (4112).

[0040] Referring to FIG. 7, the end of the second terminal (420) can pass between the second emboss (4121) and the first surface (4112) and come into contact with the first emboss (4111). The first region (420R1) of the second terminal (420) can come into contact with the first rounded portion (411R). At this time, the first region (420R1) can move along the curvature of the first rounded portion (411R) and slide between the first emboss (4111) and the second surface (4122).

[0041] Referring to FIG. 8, with the first terminal (410) and the second terminal (420) combined, the first part (421) may have a first contact surface (4211) in contact with the first emboss (4111). Additionally, the first part (421) may have the opposite side of the first contact surface (4211) in contact with the second surface (4122). Accordingly, the first part (421) may have its first direction movement fixed by the first emboss (4111) and the second surface (4122). Furthermore, the second part (422) may have a second contact surface (4221) in contact with the second emboss (4121). Additionally, the opposite side of the second contact surface (4221) may be in contact with the first surface (4112). Accordingly, the movement of the second part (422) in the first direction can be fixed by the second emboss (4121) and the first surface (4112). And, the third part (423) can be positioned between the first emboss (4111) and the second emboss (4121). The third part (423) can be positioned at an angle with respect to the second direction. The third part (423) may include an inclined surface facing the first emboss (4111). And, the third part (423) may include an inclined surface facing the second emboss (4121). The movement of the third part (423) in the second direction can be restricted by the first emboss (4111) and the second emboss (4121).

[0042] In this way, by using the first embossing (4111) and the second embossing (4121) to fix the second terminal (420) in the first direction and the second direction, the first terminal (410) and the second terminal (420) can be combined without fusing, and the manufacturing process can be simplified and the manufacturing cost can be reduced.

[0043] Although the aforementioned embodiments describe an inner rotor type motor as an example, they are not limited thereto. The present invention is also applicable to outer rotor type motors. Furthermore, it can be used in various devices, such as automobiles or home appliances. Explanation of the symbols

[0044] 100: Shaft 200: Rotor 300: Status 400: Busbar 410: Terminal 1 411: Part 1 4111: 1st Emboss 412: 2nd Part 4121: 2nd Emboss 413: 3rd Part 420: Terminal 2 421: Part 1 422: Part 2 423: Part 3 430: Busbar holder 500: Housing

Claims

Claim 1 A motor comprising: a shaft; a rotor coupled to the shaft; and a stator disposed corresponding to the rotor; wherein the stator comprises a stator core, an insulator coupled to the stator core, and a coil disposed on the insulator, and comprises a busbar electrically connected to the coil and a busbar holder supporting the busbar, wherein the busbar comprises a first terminal and a second terminal connected to the first terminal, wherein the first terminal comprises a first emboss and a second emboss, and the second terminal comprises a first part in contact with the first emboss and a second part in contact with the second emboss, wherein the first part is disposed in a first direction with the first emboss, and the second part is disposed in a second direction perpendicular to the first direction, and the first part and the second part are disposed in a second direction perpendicular to the first direction. Claim 2 delete Claim 3 A motor according to claim 1, wherein the first terminal comprises a first part and a second part spaced apart from the first part in the first direction, and the first terminal comprises an opening disposed at one end of the first part and the second part. Claim 4 In paragraph 3, a motor comprising at least one of the first embossing and the second embossing having a round portion positioned toward the opening. Claim 5 In paragraph 4, the second terminal is a motor including a round portion disposed at the end. Claim 6 In paragraph 3, the first direction distance between the first part and the second part is a motor that changes elastically. Claim 7 In paragraph 3, the motor in which the first embossing is placed in the first part and the second embossing is placed in the second part. Claim 8 In claim 7, the first part comprises a first surface spaced apart from the second embossing in the first direction, and the second part is a motor in contact with the second embossing and the first surface. Claim 9 In claim 7, the second part comprises a second surface spaced apart from the first embossing in the first direction, and the first part is a motor in contact with the first embossing and the second surface. Claim 10 A motor comprising: a shaft; a rotor coupled to the shaft; and a stator disposed corresponding to the rotor; wherein the stator comprises a stator core, an insulator coupled to the stator core, and a coil disposed on the insulator, and comprises a busbar electrically connected to the coil and a busbar holder supporting the busbar, wherein the busbar comprises a first terminal and a second terminal connected to the first terminal, wherein the first terminal comprises a first emboss and a second emboss, wherein the second terminal comprises a first part in contact with the first emboss and a second part in contact with the second emboss, wherein the second terminal comprises a third part connecting the first part and the second part, and wherein the third part is disposed at an angle to the first part and the second part.

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