Motor

Abstract

The present invention may provide 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 wherein the insulator comprises a first insulator and a second insulator, wherein the first insulator comprises a plurality of first unit insulators and a first connecting portion connecting each of the plurality of first unit insulators, and the second insulator comprises a plurality of second unit insulators and a second connecting portion connecting each of the plurality of second unit insulators, and wherein one of the plurality of first unit insulators is disposed between two of the second unit insulators.

Description

Technology Field

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

[0002] Generally, in a motor, the rotor rotates due to the electromagnetic interaction between the rotor and the stator. At this time, the shaft connected to the rotor also rotates, generating rotational driving force.

[0003] The stator may include a stator core, an insulator coupled to the stator core, and a coil disposed on the insulator. The stator may include a plurality of segmented cores.

[0004] Insulators can be mounted on each of the multiple split cores. For example, an upper insulator and a lower insulator can be mounted by fitting them onto one side and the other side of the split core, respectively. With the insulators mounted on the stator core, a coil is wound on the insulator.

[0005] These motors present a problem of complex manufacturing processes because an insulator must be installed on each segmented core. In particular, there is a significant risk of damage to the insulators during the process of inserting them into the segmented cores. Additionally, there is a risk that the installed insulators may detach from the segmented cores. The problem to be solved

[0006] Accordingly, the embodiment aims to solve the aforementioned problems by providing a motor that prevents damage to the insulator and significantly reduces the assembly process of the stator.

[0007] 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

[0008] An embodiment may provide a motor comprising a shaft, a rotor coupled to the shaft, and a stator positioned corresponding to the rotor, wherein the stator comprises a stator core, an insulator coupled to the stator core, and a coil positioned on the insulator, wherein the insulator comprises a first insulator and a second insulator, wherein the first insulator comprises a plurality of first unit insulators and a first connecting portion connecting each of the plurality of first unit insulators, and the second insulator comprises a plurality of second unit insulators and a second connecting portion connecting each of the plurality of second unit insulators, and wherein one of the plurality of first unit insulators is positioned between two of the second unit insulators.

[0009] An embodiment may provide 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, wherein the stator core comprises a plurality of first segmented cores and a plurality of second segmented cores, and the insulator comprises a first insulator coupled to the plurality of first segmented cores and a second insulator coupled to the plurality of second segmented cores, wherein the first insulator and the second insulator are each integrally formed, and the first insulator and the second insulator are coupled to each other. Effects of the invention

[0010] According to the embodiment, there is an advantage in that the assembly process of the stator can be significantly simplified by eliminating the process of assembling an insulator to the stator core.

[0011] According to the embodiment, there is an advantage of significantly reducing the risk of damage to the insulator during the assembly process of the stator.

[0012] According to the embodiment, since a plurality of split cores are fixed to a single insulator, the process of welding adjacent split cores is eliminated, thereby providing the advantage of reducing the assembly process of the stator.

[0013] According to the embodiment, since multiple split cores are insert-molded with a single insulator, there is an advantage in that the accuracy of the position of the inner surface of the split cores can be increased.

[0014] According to the embodiment, in the injection process of the split core and the insulator, since injection is possible while applying pressure to the split core, there is an advantage in that the positions of the split cores can be aligned in the axial direction.

[0015] According to an embodiment, only the first projection of the first insulator and the second projection of the second insulator are in contact, and other regions of the first insulator and the second insulator are spaced apart, so there is an advantage that the assembly of the first insulator and the second insulator is easy.

[0016] According to the embodiment, there is an advantage in that a coil of a large diameter can be easily wound. Brief explanation of the drawing

[0017] FIG. 1 is a side cross-sectional view of a motor according to an embodiment, FIG. 2 is a drawing showing the first insulator and the first split core of the motor illustrated in FIG. 1. FIG. 3 is a drawing showing the second insulator and the second split core of the motor illustrated in FIG. 1. FIG. 4 is a drawing showing a state in which a coil is wound on a first insulator and a first split core that are integrally molded. FIG. 5 is a drawing showing a state in which a coil is wound on a second insulator and a second split core that are integrally molded. FIG. 7 is a perspective view illustrating the first insulator, FIG. 8 is a plan view of the first insulator, FIG. 9 is a perspective view illustrating a second insulator, FIG. 10 is a drawing illustrating a first projection disposed on a first insulator, FIG. 11 is a drawing illustrating a second projection disposed on a second insulator, FIG. 12 is a drawing illustrating the contact state between the first protrusion and the second protrusion when the first insulator and the second insulator are assembled. FIG. 13 is a bottom view of the first insulator and the second insulator, FIG. 14 is a perspective view of the first insulator and the second insulator. FIG. 15 is a perspective view of a stator showing the combined state of the first split core and the second split core. Specific details for implementing the invention

[0018] The direction parallel to the length direction (up-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.

[0019] FIG. 1 is a side cross-sectional view of a motor according to an embodiment.

[0020] Referring to FIG. 1, the motor according to the embodiment may include a shaft (100), a rotor (200), a stator (300), and a housing (400). Hereinafter, "inner side" refers to the direction from the housing (400) 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 (400).

[0021] The shaft (100) can be coupled with 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 this.

[0022] The rotor (200) rotates through electrical interaction with the stator (300). The rotor (200) may be positioned corresponding to the stator (300) and may be positioned inside. The rotor (200) may include a rotor core and a magnet.

[0023] The stator (300) is positioned on the outside of the rotor (200). The stator (300) may include a stator core (310), an insulator (320), and a coil (330). The insulator (320) is seated on the stator core (310). The coil (330) is mounted on the insulator (320). The coil (330) causes electrical interaction with the magnet of the rotor (200).

[0024] The housing (400) may be positioned on the outside of the stator (300). The housing (400) may be a cylindrical member. The housing (400) may be made of steel.

[0025] FIG. 2 is a drawing showing the first insulator (320A) and the first split core (310A) of the motor shown in FIG. 1.

[0026] Referring to FIG. 2, the stator core (310) may include a plurality of first segmented cores (310A). The first insulator (320A) and the plurality of first segmented cores (310A) may be injection molded together and formed integrally. The plurality of first segmented cores (310A) may be positioned on the first insulator (320A) at regular intervals along the circumferential direction of the stator (300), corresponding to the shape of the first insulator (320A).

[0027] For example, if the number of first divided cores (310A) is 6, the first divided cores (310A) may be arranged at 60° intervals. The shape of the first insulator (320A) may also be formed corresponding to the position of these first divided cores (310A). A nozzle for winding may be inserted into the space between adjacent first divided cores (310A) along the circumferential direction.

[0028] FIG. 3 is a drawing showing the second insulator (320B) and the second split core (310B) of the motor shown in FIG. 1.

[0029] Referring to FIG. 3, the stator core (310) may include a plurality of second segmented cores (310B). The second insulator (320B) and the plurality of second segmented cores (310B) may be injection-molded together to form a single integral. The plurality of second segmented cores (310B) may be positioned on the second insulator (320B) at regular intervals along the circumferential direction of the stator (300), corresponding to the shape of the second insulator (320B).

[0030] For example, if the number of second split cores (310B) is 6, the second split cores (310B) may be arranged at 60° intervals. The shape of the second insulator (320B) may also be formed corresponding to the position of these second split cores (310B). A nozzle for winding may be inserted into the space between adjacent second split cores (310B) along the circumferential direction.

[0031] The shape and size of the first insulator (320A) may be the same as the shape and size of the second insulator (320B).

[0032] Since multiple segmented cores are injected together and molded into the insulator (320), the process of assembling the insulator (320) to the stator core (310) can be eliminated. Additionally, since the stator core (310) and the insulator (320) are implemented as a single unit during the molding process of the insulator (320), there is an advantage in that positional alignment between the segmented cores is easy.

[0033] For example, since the split cores are fixed to the insulator (320) at once, the positions of the inner circumference of the split cores can be accurately aligned rather than assembling each split core individually. In addition, since the split cores can be injected under pressure during the process of injecting the split cores together with the insulator (320), the axial positions of multiple split cores can be accurately aligned.

[0034] FIG. 4 is a drawing showing a state in which a coil is wound on a first insulator (320A) and a first split core (310A) that are integrally molded, and FIG. 5 is a drawing showing a state in which a coil (330) is wound on a second insulator (320B) and a second split core (310B) that are integrally molded.

[0035] Referring to FIG. 4, a plurality of first split cores (310A) are fixed to the first insulator (320A) through injection. A nozzle enters the space between the first split cores (310A) so that the first insulator (320A) coil (330) can be wound. The winding process of the coil (330) can be performed for each first split core (310A), or after winding one coil (330) on all first split cores (310A), the coil (330) can be cut.

[0036] Referring to FIG. 5, a plurality of second split cores (310B) are fixed to a second insulator (320B) through injection. A nozzle enters the space between the second split cores (310B) so that a coil (330) can be wound on the second insulator (320B). The winding process of the coil (330) may be performed for each second split core (310B), or after winding one coil (330) on all second split cores (310B), the coil (330) may be cut.

[0037] Thus, since the winding of the coil (330) is divided and carried out in the first insulator (320A) and the second insulator (320B), it is easy to secure space for winding, which has the advantage of making the winding work easy.

[0038] FIG. 6 is a drawing illustrating the process of assembling the first insulator (320A) and the second insulator (320B).

[0039] Referring to FIG. 6, the stator can be completed by assembling together axially one part consisting of a first insulator (320A) with a coil (330) wound thereon and a first split core (310A), and another part consisting of a second insulator (320B) with a coil (330) wound thereon and a second split core (310B).

[0040] When the first insulator (320A) and the second insulator (320B) are assembled in this way, the first insulator (320A) and the second insulator (320B) are alternately arranged along the circumferential direction.

[0041] This type of stator structure has the advantage of simplifying the process and facilitating assembly because it eliminates the need to assemble individual segmented cores by arranging them in a circular pattern.

[0042] FIG. 7 is a perspective view illustrating the first insulator (320A), and FIG. 8 is a plan view of the first insulator (320A).

[0043] Referring to FIGS. 7 and 8, the first insulator (320A) may include a plurality of first unit insulators (321A) and a first connecting part (322A).

[0044] A plurality of first unit insulators (321A) are each coupled to the first split core (310A). The first unit insulators (321A) are arranged at regular intervals along the circumferential direction of the first insulator (320A). The space (SP1) between adjacent first unit insulators (321A) based on the circumferential direction is where the second unit insulator (320) is located. These first unit insulators (321A) may include a first body (A3) on which a coil (330) is wound, a first inner guide (A2) disposed inside the first body (A1), and a first outer guide (A3) disposed outside the first body (A1).

[0045] The first outer guide (A3) may be divided into an intermediate section (A31), a first end section (A32), and a second end section (A33) along the axial direction. The intermediate section (A31) is positioned at a location corresponding to the first body (A1) in the axial direction. The first end section (A32) and the second end section (A33) are each positioned to protrude beyond the first body (A1) in the axial direction.

[0046] The first connecting part (322A) connects each of the first unit insulators (321A). The first connecting part (322A) can connect one end of the first inner guide (A2) of the adjacent first unit insulator (321A). This first connecting part (322A) may be formed as an arc-shaped member so that the first connecting part (322A) and one end of the first inner guide (A2) together form an annular shape.

[0047] The first inner guide (A2) may include a first surface (S1) and a second surface (S2). The first surface (S1) and the second surface (S2) may be disposed on each side of the first inner guide (A2).

[0048] During the process of assembling the first insulator (320A) and the second insulator (320B), the first surface (S1) may come into contact with one side of the second inner guide (B2), and the second surface (S2) may come into contact with the other side of the second inner guide (B2).

[0049] Meanwhile, the first insulator (320A) may include a plurality of ribs (323A). The ribs (323A) protrude axially from the first connecting part (322A) or the first inner guide (A2). The ribs (323A) may be arranged at regular intervals based on the circumferential direction of the first insulator (320A). The ribs (323A) may contact a busbar (not shown) and serve to fix the busbar to the first insulator (320A).

[0050] FIG. 9 is a perspective view illustrating the second insulator (320B).

[0051] FIG. 9 shows that the second insulator (320B) may include a plurality of second unit insulators (321B) and a second connecting part (322B). The plurality of second unit insulators (321B) are each coupled to the second split core (310B). The second unit insulator (321B) may include a second body (B1) on which a coil (330) is wound, a second inner guide (B2) disposed inside the second body (B1), and a second outer guide (B3) disposed outside the second body (B1). The second insulator (320B) may also include a plurality of ribs (323A), similar to the first insulator (320A).

[0052] This second insulator (320B) may have the same size and shape as the first insulator (320A).

[0053] FIG. 10 is a drawing illustrating a first projection (P1) placed on a first insulator (320A).

[0054] Referring to FIG. 10, the first insulator (320A) may include a first projection (P1). The first projection (P1) may be positioned to protrude from both sides of the first end (A32) and both sides of the second end (A33) of the first outer guide (A3). The first projection (P1) is intended for assembly with the second insulator (320B). This first projection (P1) may be positioned lengthwise along the axial direction from the first end (A32). The first projection (P1) may have a tapered shape. For example, the first projection (P1) may be formed such that the protruding height is greater closer to the middle section (A31).

[0055] FIG. 11 is a drawing showing a second projection placed on the second insulator (320B).

[0056] Referring to FIG. 11, the second insulator (320B) may include a second projection (P2). The second projection (P2) may be positioned to protrude from both sides of the first end (A32) and both sides of the second end (A33) of the second outer guide (B3), respectively. The second projection (P2) is intended for assembly with the first insulator (320A). This second projection (P2) may be positioned lengthwise along the axial direction from the first end (A32). The first projection (P1) may have a tapered shape. For example, the first projection (P1) may be formed such that the protruding height increases as it approaches the middle section (A31).

[0057] FIG. 12 is a drawing illustrating the contact state between the first protrusion (P1) and the second protrusion (P2) when assembling the first insulator (320A) and the second insulator (320B).

[0058] Referring to FIG. 12, when one part consisting of a first insulator (330) wound with a coil (330) and a first split core (310A) and another part consisting of a second insulator (320B) wound with a coil (330) and a second split core (310B) are assembled axially together, the first protrusion (P1) and the second protrusion (P2) come into contact. As the first protrusion (P1) and the second protrusion (P2) come into contact with each other, the bonding force between the first insulator (320A) and the second insulator (320B) is increased.

[0059] The first insulator (320A) and the second insulator (320B) are spaced apart from each other in the area excluding the first protrusion (P1) and the second protrusion (P2), so as to form a spaced-away space like G in FIG. 12.

[0060] Since the first protrusion (P1) and the second protrusion (P2) each have a tapered shape, when the first split core (310A) and the second split core (310B) begin to be combined in the axial direction, the first protrusion (P1) and the second protrusion (P2) do not come into contact, thereby preventing interference during assembly. However, when the combination of the first split core (310A) and the second split core (310B) proceeds, the first protrusion (P1) and the second protrusion (P2) come into contact, thereby securing the bonding force between the first insulator (320A) and the second insulator (320B).

[0061] FIG. 13 is a bottom view of the first insulator (320A) and the second insulator (320B), and FIG. 14 is a perspective view of the first insulator (320A) and the second insulator (320B).

[0062] Referring to FIG. 13, the inner surface (A2a) of the first inner guide (A2) of the first insulator (320A) and the inner surface (322Ba) of the second connecting part (322B) of the second insulator (320B) can be arranged on the same plane. And referring to FIG. 14, the inner surface (B2a) of the second inner guide (B2) of the second insulator (320B) and the inner surface (322Aa) of the first connecting part (322A) of the first insulator (320A) can be arranged on the same plane.

[0063] This is to reduce interference from the insulator (320) when inserting the rotor (200) into the inside of the stator (300).

[0064] Referring to FIG. 3, the first inner guide (A2) may include a third surface (S3). The third surface (S3) is a surface that contacts the second connecting part (322B) of the second insulator (320B). Also, the two side ends (S3a) of the third surface (S3) connected to the side of the first inner guide (A2) may be curved surfaces.

[0065] Referring to FIG. 4, the second inner guide (B2) may include a fourth surface (S4). The fourth surface (S4) is a surface that contacts the first connecting part (322A) of the first insulator (320A). And the two side ends (S4a) of the fourth surface (S4) connected to the side of the second inner guide (B2) may be curved surfaces.

[0066] This has the advantage of facilitating the combination of the first inner guide (A2) and the second inner guide (B2).

[0067] Referring to FIG. 13, the outer surface (A2b) of the first inner guide (A2) of the first insulator (320A) and the outer surface (322Bb) of the second connecting part (322B) of the second insulator (320B) can be arranged on the same plane.

[0068] Referring to FIG. 14, the outer surface (B2b) of the second inner guide (B2) of the second insulator (320B) and the outer surface (322Ab) of the first connecting part (322A) of the first insulator (320A) can be arranged on the same plane.

[0069] This configuration is intended to prevent interference with the coil (330) during the winding process by preventing a step difference from occurring between the first inner guide (A2) and the second connecting part (322B) or between the second inner guide (B2) and the first connecting part (322A).

[0070] FIG. 15 is a perspective view of a stator showing the combined state of the first split core (310A) and the second split core (310B).

[0071] Referring to FIG. 15, the first split core (310A) may include a groove (310Aa). The groove (310Aa) may be disposed on one side of the first split core (310A). The groove (310Aa) may be disposed along the axial direction. The second split core (310B) may include a third projection (310Ba). The third projection (310Ba) may be disposed on the other side of the second split core (310B) facing the one side of the first split core (310A). The third projection (310Ba) may be disposed along the axial direction on the other side of the second split core (310B).

[0072] When one part consisting of a first insulator (320A) with a coil (330) wound around it and a first split core (310A) and another part consisting of a second insulator (320B) with a coil (330) wound around it and a second split core (310B) are assembled together in the axial direction, the third projection (310Ba) is slidably coupled to the groove (310Aa) along the axial direction.

[0073] In this way, the first split core (310A) and the second split core (310B) interlock with each other, and the first protrusion (P1) of the first insulator (320A) and the second protrusion (P2) of the second insulator (320B) come into contact, thereby securing a bonding force and hot-pressing into the housing (400), so the process of separately welding the first split core (310A) and the second split core (310B) can be omitted.

[0074] The aforementioned embodiments can be used in various devices, such as vehicles or home appliances. Explanation of the symbols

[0075] 100: Shaft 200: Rotor 300: Status 310: Status Core 320: Insulator 320A: First insulator 321A: 1st unit insulator 320B: Second insulator 321B: Second unit insulator 330: Coil 400: 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, wherein the insulator comprises a first insulator and a second insulator, wherein the first insulator comprises a plurality of first unit insulators and a first connecting portion connecting each of the plurality of first unit insulators, and the second insulator comprises a plurality of second unit insulators and a second connecting portion connecting each of the plurality of second unit insulators, wherein one of the plurality of first unit insulators is disposed between two of the second unit insulators, wherein the first insulator comprises a first outer guide, and the second insulator comprises a second outer guide, wherein the first outer guide comprises a first projection, and the first projection contacts the second outer guide. Claim 2 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; wherein the stator core comprises a plurality of first segmented cores and a plurality of second segmented cores; wherein the insulator comprises a first insulator coupled to the plurality of first segmented cores and a second insulator coupled to the plurality of second segmented cores; wherein the first insulator and the second insulator are each integrally formed, and the first insulator and the second insulator are coupled to each other; wherein the first insulator comprises a first outer guide, and the second insulator comprises a second outer guide, and the first outer guide comprises a first projection, and the first projection contacts the second outer guide. Claim 3 In claim 1 or 2, the first insulator and the second insulator are alternately arranged along the circumferential direction based on the circumferential direction of the insulator. Claim 4 A motor according to claim 1 or 2, wherein the first insulator comprises a first inner guide, the second insulator comprises a second inner guide, and the first inner guide comprises a first surface in contact with one side of the second inner guide and a second surface in contact with the other side of the second inner guide. Claim 5 delete Claim 6 In claim 1 or 2, the second outer guide includes a second projection, and the second projection contacts the first projection, forming a motor. Claim 7 In claim 6, the first insulator and the second insulator are spaced apart from each other in the area excluding the first protrusion and the second protrusion, forming a motor. Claim 8 A motor according to claim 4, wherein the inner surface of the first inner guide and the inner surface of the second connecting part are arranged on the same plane, and the inner surface of the second inner guide and the inner surface of the first connecting part are arranged on the same plane. Claim 9 A motor according to claim 4, wherein the outer surface of the first inner guide and the outer surface of the second connecting part are arranged on the same plane, and the outer surface of the second inner guide and the outer surface of the first connecting part are arranged on the same plane. 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; wherein the insulator comprises a first insulator and a second insulator; wherein the first insulator comprises a plurality of first unit insulators and a first connecting portion connecting each of the plurality of first unit insulators; wherein the second insulator comprises a plurality of second unit insulators and a second connecting portion connecting each of the plurality of second unit insulators; wherein one of the plurality of first unit insulators is disposed between two of the second unit insulators; wherein the first insulator comprises a first inner guide, wherein the first inner guide comprises a third surface in contact with the second connecting portion; wherein the second insulator comprises a second inner guide, wherein the second inner guide comprises a fourth surface in contact with the first connecting portion.

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