Motor device

Abstract

To provide a motor device capable of suppressing interference between coil crossing wires.SOLUTION: A wiper motor 10 includes a stator core, a conductor wire LW, and a terminal 82. The terminal 82 includes a U-phase first terminal 84, a V-phase second terminal 86, and a W-phase third terminal 88. The conductor wire LW includes a first wiring portion LW1 that connects the first terminal 84 and the second terminal 86, a second wiring portion LW2 that connects the second terminal 86 and the third terminal 88, and a third wiring portion LW3 that connects the third terminal 88 and the first terminal 84. Each of the first wiring portion LW1, the second wiring portion LW2, and the third wiring portion LW3 includes a plurality of coil portions C. A routing direction of the first wiring portion LW1 and that of the third wiring portion LW3 are a forward direction, and the routing direction of the second wiring portion LW2 is a reverse direction toward a side opposite to the forward direction.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to a motor device.

Background Art

[0002] In the motor described in Patent Document 1, for each of the first power supply terminal, the second power supply terminal, and the third power supply terminal, the extension and reach of the coil for that power supply terminal are performed multiple times. Further, the winding directions of the coils of adjacent different phases (W phase and U phase, U phase and V phase, V phase and W phase) are the same.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the motor of Patent Document 1, the extension and reach of the coil are performed multiple times for each power supply terminal. Further, since the winding directions of the coils of adjacent different phases are the same, it is difficult to avoid the intersection of the crossover wires of the coils not only in the coils of different phases but also within the coils of the same phase. Thus, in the motor of Patent Document 1, there is a risk that there will be many locations where the crossover wires of the coils interfere with each other.

[0005] An object of the present invention is to provide a motor device capable of suppressing the interference between the crossover wires of the coils.

Means for Solving the Problems

[0006] A motor device according to one aspect of the present invention comprises a cylindrical body and a plurality of teeth projecting radially outward from the body, a stator core facing the rotor body in the radial direction, a conductor routed along the circumferential direction of the body, and a terminal located on one axial end face of the stator core that supplies current to the conductor, having a first terminal for the first phase, a second terminal for the second phase, and a third terminal for the third phase arranged sequentially in the circumferential direction, wherein the conductor has a first wiring section connecting the first terminal and the second terminal, and a section connecting the second terminal and the third terminal. It has a second wiring section and a third wiring section connecting the third terminal and the first terminal, and each of the first, second, and third wiring sections has a plurality of coil sections wound around the plurality of teeth, and the routing direction of the first wiring section from the first terminal to the second terminal and the routing direction of the third wiring section from the third terminal to the first terminal are aligned in the forward direction toward one side of the circumferential direction, and the routing direction of the second wiring section from the second terminal to the third terminal is in the reverse direction toward the opposite side of the forward direction. The first wiring section has a first jumper section connecting a plurality of coil sections, the second wiring section has a second jumper section connecting a plurality of coil sections, the third wiring section has a third jumper section connecting a plurality of coil sections, the conductor has two conductors, a first conductor and a second conductor, any two of the first, second, and third wiring sections are formed by the first conductor, the remaining one wiring section is formed by the second conductor, of the first, second, and third jumper sections, the two jumper sections formed by the first conductor are located on the one end face side of the stator core, and the one jumper section formed by the second conductor is located on the opposite side of the one end face in the axial direction. It is characterized by the following: Another aspect of the present invention provides a motor device comprising a cylindrical body and a plurality of teeth projecting radially outward from the body, a stator core facing the rotor body in the radial direction, a conductor routed along the circumferential direction of the body, and a terminal located on one axial end face of the stator core that supplies current to the conductor, the conductor comprising a first wiring section connecting the first terminal and the second terminal, a second wiring section connecting the second terminal and the third terminal, The device has a third wiring section connecting the third terminal and the first terminal, the first wiring section, the second wiring section and the third wiring section are formed from a single conductor, or the first wiring section and the second wiring section are formed from a single conductor and the third wiring section is formed from a single conductor, and each of the first wiring section, the second wiring section and the third wiring section has a plurality of coil sections wound around the plurality of teeth, and a connecting section that connects the terminal and the coil sections and the coil sections to each other and is routed along the circumferential direction, The wiring has the following characteristics: the routing direction of the connecting portion of the first wiring section and the routing direction of the connecting portion of the third wiring section are aligned in the forward direction toward one side of the circumferential direction, the routing direction of the connecting portion of the second wiring section is in the reverse direction toward the opposite side of the forward direction, the plurality of coil sections have a first coil section, a second coil section, a third coil section, a fourth coil section, a fifth coil section, a sixth coil section, a seventh coil section, an eighth coil section, a ninth coil section, a tenth coil section, an eleventh coil section, and a twelfth coil section arranged in the forward direction, and the first wiring section extends from the first terminal to the front The wiring is routed in the order of the first coil section, the second coil section, the seventh coil section, and the eighth coil section, and the second wiring section is routed from the second terminal in the order of the twelfth coil section, the eleventh coil section, the sixth coil section, and the fifth coil section, and the third wiring section is routed from the third terminal in the order of the third coil section, the fourth coil section, the ninth coil section, and the tenth coil section, and when the multiple coil sections are viewed from the center of the main body, the first coil section, the fourth coil section, the fifth coil section, and the eighth coil section,The winding direction of the conductor in the 9th coil section and the 12th coil section is clockwise, and the winding direction of the conductor in the 2nd coil section, the 3rd coil section, the 6th coil section, the 7th coil section, the 10th coil section and the 11th coil section is counterclockwise, and the plurality of teeth include a first tooth and a second tooth on which the coil sections are wound adjacent to each other in the circumferential direction and in phase, and the first wiring section, the second wiring section and the third wiring section each have one of the coil sections wound on the first tooth and another coil section wound on the second tooth, and the starting and ending portions of the winding of one of the coil sections on the first tooth of the conductor are located on either one of the axial end faces and the other end face of the stator core and are located between the first tooth and the second tooth in the circumferential direction. The conductor, of which the starting and ending portions of the other coil section to the second tooth are located on the other of either one end face or the other end face in the axial direction of the stator core, and are located between the first tooth and the second tooth in the circumferential direction. The conductor has an intermediate connecting portion that extends from either one of the end faces through the space between the first tooth and the second tooth to the other end face, connecting one coil section to the other coil section; an inlet portion that extends from the connecting portion to the starting portion of the first coil section; and an outlet portion that extends from the ending portion of the other coil to the connecting portion. The inlet portion extends in the same direction as the winding direction of the conductor in the first coil section, and the outlet portion extends in the same direction as the winding direction of the conductor in the other coil section. [Effects of the Invention]

[0007] According to one aspect of the present invention, the first wiring section and the third wiring section are routed in the forward direction from the first terminal and the third terminal, respectively. On the other hand, the second wiring section is routed in the reverse direction from the second terminal. As a result, near the second and third terminals of the terminal, the portion of the second wiring section that extends in the reverse direction from the second terminal and the portion that extends toward the third terminal are less likely to intersect. This makes it possible to suppress interference between the jumper wires compared to a configuration in which the first, second, and third wiring sections are routed in the forward direction. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view of a wiper motor according to the first embodiment. [Figure 2] This is a cross-sectional view along line AA in Figure 1. [Figure 3]Figure 1 is a plan view showing the stator unit and rotor unit of the wiper motor. [Figure 4] Figure 1 is a perspective view showing the stator unit of the wiper motor. [Figure 5] This is an explanatory diagram showing the winding direction of each coil section wound around each tooth of the stator unit in Figure 4. [Figure 6] Figure 5 is a schematic diagram illustrating the delta connection of the three phases of conductors. [Figure 7] Figure 5 is a schematic unfolded diagram showing the winding direction in each coil section of the three-phase conductor. [Figure 8] This is an explanatory diagram showing the relationship between the position of the U-phase terminal and the starting position of the wire winding in the first coil group. [Figure 9] This is an explanatory diagram showing the relationship between the position of the V-phase terminal and the starting position of the wire winding in the second coil group. [Figure 10] This is an explanatory diagram showing the relationship between the position of the W-phase terminal and the starting position of the wire winding in the third coil group. [Figure 11] This is a plan view showing the stator unit of a wiper motor according to the second embodiment. [Figure 12] This is a schematic unfolded view showing the winding direction in each coil section of Figure 11. [Figure 13] This is a plan view that is an enlarged portion of Figure 11. [Figure 14] Figure 11 is a schematic diagram illustrating the state in which the two conductors are connected in a delta configuration. [Figure 15] Figure 14 is a side view showing how the two wires are routed along one and the other axial sides of the stator core. [Figure 16] Figure 11 is a schematic unfolded view showing the winding direction in each coil section for the first modified example of the stator unit. [Figure 17] Figure 16 is a schematic explanatory diagram illustrating the first modified example in which two conductors are connected in a delta configuration. [Figure 18] Figure 11 shows a schematic unfolded view illustrating the winding direction in each coil section for a second modified example of the stator unit. [Figure 19] It is an explanatory diagram schematically showing a state in which two conducting wires are delta-connected in the second modification of FIG. 18. [Figure 20] It is a developed view schematically showing the winding direction in each coil part of the wiper motor according to the third embodiment. [Figure 21] It is an explanatory diagram schematically showing a state in which a conducting wire is wound around one set of coil parts among a plurality of coil parts in FIG. 20. [Figure 22] It is an explanatory diagram schematically showing a state in which a conducting wire is wound around another set of coil parts among a plurality of coil parts in FIG. 2o. [Figure 23] As a first comparative example with respect to the third embodiment, it is an explanatory diagram schematically showing a state in which a conducting wire is wound around one set of coil parts among a plurality of coil parts. [Figure 24] As a second comparative example with respect to the third embodiment, it is an explanatory diagram schematically showing a state in which a conducting wire is wound around another set of coil parts among a plurality of coil parts.

Embodiments for Carrying out the Invention

[0009] Hereinafter, the first embodiment of the present invention will be described with reference to FIGS. 1 to 10. In FIGS. 1 to 10, the same or similar components are denoted by the same reference numerals, and redundant descriptions are omitted. Also, in FIGS. 1 to 10, the scales and dimensions of each component may be exaggerated, or some components may be omitted. In the following description, unless otherwise specified, terms such as "first", "second", etc. are only used to distinguish components from each other and do not represent a specific order or sequence.

[0010] In the following explanation, "axial direction" refers to the direction in which the central axis CA (Figure 2) of the stator core 72 (Figure 2), described later, extends. "Circumferential direction" refers to the circumferential direction of the main body portion 74 (Figure 4) of the stator core 72. "Radial direction" refers to the radial direction of the main body portion 74. The axial direction and radial direction are perpendicular to each other. Here, the axial direction is denoted as the Z direction and is indicated by the arrow Z. The axial direction, as an example, runs along the vertical direction. The tip of arrow Z corresponds to the upper side, and the base of arrow Z corresponds to the lower side.

[0011] The direction in which the rotation axis SH1 and output axis SH2, described later, are aligned is defined as the X direction and is indicated by the arrow X. The X direction is, for example, the left-right direction. The tip of arrow X corresponds to the right side, and the base of arrow X corresponds to the left side. The direction perpendicular to both the X and Z directions is defined as the Y direction and is indicated by the arrow Y. The Y direction is, for example, the front-back direction. The tip of arrow Y corresponds to the front side, and the base of arrow Y corresponds to the back side.

[0012] [First Embodiment] The wiper motor 10 of the first embodiment shown in Figure 1 is a drive source for a wiper device (not shown) mounted on the front of a vehicle such as an automobile. The wiper motor 10 is an example of a motor device and is mounted near the windshield (not shown) of the vehicle. The wiper motor 10 is operated by operating a wiper switch (not shown) located inside the vehicle. A wiper member (not shown) that is swingably mounted on the windshield performs a wiping operation by reciprocating in response to the operation of the wiper motor 10.

[0013] The wiper motor 10 comprises a gear section 20 and a motor body section 40. The gear section 20 and the motor body section 40 are firmly fixed together by a plurality of fixing screws S1.

[0014] [Gear section] As shown in Figure 2, the gear section 20 includes a gear housing 22, a helical gear 28, and an output shaft SH2.

[0015] The gear housing 22 is formed in a stepped, roughly dish-like shape by injection molding molten aluminum material. The gear housing 22 also has a gear housing section 24, a base plate mounting section 26, and a bearing member housing section 36. The gear housing section 24 rotatably houses the helical gear 28. The gear housing 22 is provided with a cylindrical bearing section 29 that rotatably supports the output shaft SH2. As a result, the output shaft SH2 is supported by the gear housing 22 smoothly and rotatably without any play.

[0016] The output shaft SH2 is formed in a substantially cylindrical shape with a central axis CB along the Z direction. The lower end of the output shaft SH2 is fixed to a disc-shaped shaft fixing part 32. The shaft fixing part 32 is fixed to the upper center of the helical gear 28 by pins and screws (not shown). A substantially disc-shaped sensor magnet 34 is fixed to the lower center of the helical gear 28. The sensor magnet 34 is used to detect the rotational position of the helical gear 28.

[0017] The bearing member housing 36 is located to the right in the X direction relative to the output shaft SH2. Inside the bearing member housing 36 is the third bearing B3. The third bearing B3 rotatably supports the upper end of the rotating shaft SH1, which will be described later. The third bearing B3 restricts the radial movement of the rotating shaft SH1, but does not restrict its thrust movement.

[0018] A backup member 38 is fixed to the lower part of the gear housing 24 relative to the bearing member housing 36. The backup member 38 is made of a resin material such as plastic. The backup member 38 is positioned with a small gap between it and the outer circumferential surface of the pinion gear 66, which will be described later. The backup member 38 is also positioned to cover half of the circumferential surface of the pinion gear 66. In this way, the backup member 38 prevents the pinion gear 66 from bending when a large external force is applied to the output shaft SH2 and the pinion gear 66 receives a pressing force from the helical gear 28.

[0019] [Motor body] As shown in Figure 2, the motor body 40 includes a motor housing 42 and a brushless motor 60.

[0020] <Motor Housing> The motor housing 42 is formed in a stepped, roughly dish-like shape by injection molding molten aluminum material. The motor housing 42 includes a motor housing section 44, a base mounting section 48, and a base plate 56.

[0021] The motor housing 44 has a bottom wall 45, a fixed wall 46, and side walls 47. A brushless motor 60 is housed inside the motor housing 44. The bottom wall 45 is formed in a substantially disc shape with a predetermined thickness in the Z direction. The fixed wall 46 is a cylindrical wall portion that stands upright from the center of the bottom wall 45 to the upper side in the Z direction. The first bearing B1 is fixed to the fixed wall 46. The side walls 47 stand upright from the outer edge of the bottom wall 45 to the upper side in the Z direction.

[0022] A flange 47A is provided at the upper end of the side wall 47, aligning with the XY plane. The flange 47A, together with the base plate mounting portion 26, sandwiches the base plate 56 in the Z direction. The flange 47A and the base plate 56 are fixed to the base plate mounting portion 26 by fixing screws S1.

[0023] The base mounting portion 48 is located to the left in the X direction relative to the motor housing portion 44 and is adjacent to the motor housing portion 44. The base mounting portion 48 is also located below the output shaft SH2. A retaining member 54 for holding the sensor substrate 52 is mounted inside the base mounting portion 48.

[0024] As an example, the sensor board 52 is equipped with one Hall sensor HS1 and three Hall sensors HS2. Note that in Figure 2, only one of the three Hall sensors HS2 is shown, and the other two Hall sensors HS2 are not shown.

[0025] The Hall sensor HS1 detects the rotational position of the sensor magnet 34. In other words, the Hall sensor HS1 is used to detect the rotational position of the helical gear 28 and the output shaft SH2. A controller (not shown) determines the rotational state of the output shaft SH2 based on the detection signal from the Hall sensor HS1.

[0026] The three Hall sensors HS2 correspond to the U-phase, V-phase, and W-phase described later. The controller, based on the detection signals (square wave signals) from each Hall sensor HS2, determines the rotation state of the rotating shaft SH1 (rotation speed, direction of rotation, etc.) and precisely controls the rotation state of the rotating shaft SH1.

[0027] The base plate 56 is a member having a predetermined thickness in the Z direction and covers the motor housing 44 from above. A second bearing B2 is fixed to the lower part of the base plate 56. The second bearing B2 is located above the first bearing B1. Together with the first bearing B1 and the third bearing B3, the second bearing B2 rotatably supports the rotating shaft SH1.

[0028] <Brushless motor> The brushless motor 60 comprises a rotor unit 62 and a stator unit 70.

[0029] (Rotor unit) The rotor unit 62 has a rotating shaft SH1 made of a round steel bar and a rotor body 64 formed in a roughly dish shape. The lower part of the rotating shaft SH1 in the Z direction is rotatably supported by a first bearing B1 and a second bearing B2. The upper end of the rotating shaft SH1 is rotatably supported by a third bearing B3. A pinion gear 66 is integrally provided on the upper part of the rotating shaft SH1 relative to its center in the Z direction. The pinion gear 66 is formed in a helical shape by knurling or the like.

[0030] The rotor body 64 rotates the rotation shaft SH1. The rotor body 64 is formed by pressing a steel plate (magnetic material) to create a roughly U-shaped cross-section. The rotor body 64 comprises a rotor bottom wall 64A and a cylindrical rotor side wall 64B extending upward in the Z direction from the outer edge of the rotor bottom wall 64A.

[0031] A boss portion 64C is integrally provided at the center (rotation center) of the rotor bottom wall 64A. The boss portion 64C is a cylindrical portion that stands upright from the rotor bottom wall 64A in the axial direction of the rotation shaft SH1. The lower part of the rotation shaft SH1 is firmly fixed to the boss portion 64C by press-fitting. In this way, the base end portion of the rotation shaft SH1 is fixed to the rotor bottom wall 64A, so that the rotation shaft SH1 rotates together with the rotor body 64.

[0032] As shown in Figure 3, a 14-pole magnet MG is fixed to the inner circumferential surface 65 located radially inward of the rotor sidewall 64B, as an example. The magnet MG is formed in a roughly tile-like (roughly arc-shaped) form when viewed from the Z direction. These magnet MGs are arranged at equal intervals in the circumferential direction of the rotor body 64 and are firmly fixed to the rotor sidewall 64B with an epoxy resin adhesive. A stator core 72, which will be described later, is located radially inward of the 14-pole magnet MG.

[0033] (Stator unit) As shown in Figure 4, the stator unit 70 includes, as an example, a stator core 72, an insulator 76, a terminal 82, and a conductor LW.

[0034] <Stator Core> The stator core 72 comprises a cylindrical body portion 74 and a plurality of teeth T, with the body portion 74 facing the rotor body 64 (Figure 3) in the radial direction. The stator core 72 is formed by laminating a plurality of thin steel plates (magnetic material) in the Z direction. Three fixing portions 75 are provided on the inner circumference of the body portion 74 for fixing the stator core 72 to the base plate 56 (Figure 2).

[0035] Multiple teeth T protrude radially outward from the outer circumferential surface of the main body 74. Specifically, the multiple teeth T consist of, for example, teeth T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, and T12. When viewing the stator core 72 from above, teeth T1 to T12 are arranged in order at equal intervals in a clockwise direction (forward direction). Note that "viewing from above" means viewing the stator core 72 from the upper side in the Z direction (the side where the terminal 82, described later, is located).

[0036] <Insulator> The insulator 76 is made of an insulating material such as plastic and covers the upper and lower ends of the main body 74, as well as the portion around which the conductors LW of the multiple teeth T are wound. The insulator 76 does not cover the outer circumferential surface of teeth T1 to T12. In other words, the outermost portion of teeth T1 to T12 is exposed radially. Of the parts that make up the insulator 76, the cylindrical portion that covers the upper end of the main body 74 is called the upper edge portion 77. The upper edge portion 77 is provided on one axial end face 72A of the stator core 72.

[0037] <Terminal> Terminal 82 is located on the upper edge portion 77. In other words, terminal 82 is located on one end face 72A in the axial direction of the stator core 72. Terminal 82 is a terminal portion that supplies current supplied at predetermined timings from a controller (not shown) to the conductor LW. Specifically, terminal 82 comprises a first terminal 84 for the first phase, a second terminal 86 for the second phase, and a third terminal 88 for the third phase, which are arranged in order in the circumferential direction (clockwise direction in a plan view) of the main body portion 74.

[0038] For example, the first terminal 84, the second terminal 86, and the third terminal 88 are arranged within a range of approximately 60° in the circumferential direction of the main body 74. Furthermore, the first terminal 84, the second terminal 86, and the third terminal 88 are arranged at equal intervals in the circumferential direction.

[0039] <Conductor> As shown in Figure 6, the conductor LW consists of a single conductive wire and is a component corresponding to the U phase (an example of the first phase), the V phase (an example of the second phase), and the W phase (an example of the third phase). The conductor LW is routed along the circumferential direction of the main body 74 (Figure 4). The conductor LW has a first wiring section LW1 connecting the first terminal 84 and the second terminal 86, a second wiring section LW2 connecting the second terminal 86 and the third terminal 88, and a third wiring section LW3 connecting the third terminal 88 and the first terminal 84. Note that the first wiring section LW1, the second wiring section LW2, and the third wiring section LW3 are names used to distinguish three parts of a single conductor LW, and do not mean that there are three conductors LW.

[0040] Each of the first wiring section LW1, the second wiring section LW2, and the third wiring section LW3 has multiple coil sections C (Figure 4) wound around each of the multiple teeth T with a predetermined number of turns. In a single conductor LW, the portion between the multiple coil sections C (the portion not wound around the teeth T) is referred to as a jumper wire K (Figure 7).

[0041] Figure 7 schematically shows the routing of a single conductor LW and the winding state in multiple coil sections C. Note that Figure 7 shows the winding direction of the conductor LW in each coil section C, and does not represent the number of turns of the conductor LW in each coil section C. The first wiring section LW1 is distinguished by a solid line, the second wiring section LW2 by a dotted line, and the third wiring section LW3 by a dashed line. Terminals A1, A2, and A3 shown in Figure 7 are hypothetical terminals that represent the connection between the right and left ends of the conductor LW in Figure 7.

[0042] As shown in Figure 7, the first wiring section LW1 includes a jumper wire K1 and the first coil section C1, the second coil section C2, the seventh coil section C7, and the eighth coil section C8, which will be described later. The second wiring section LW2 includes a jumper wire K2 and the fifth coil section C5, the sixth coil section C6, the eleventh coil section C11, and the twelfth coil section C12, which will be described later. The third wiring section LW3 includes a jumper wire K3 and the third coil section C3, the fourth coil section C4, the ninth coil section C9, and the tenth coil section C10, which will be described later.

[0043] Furthermore, the portion of the jumper wire K2 from the second terminal 86 to the twelfth coil section C12 is designated as jumper wire K2A, and the portion from the fifth coil section C5 to the third terminal 88 is designated as jumper wire K2B.

[0044] As shown in Figure 4, the multiple coil sections C have a first coil section C1, a second coil section C2, a third coil section C3, a fourth coil section C4, a fifth coil section C5, a sixth coil section C6, a seventh coil section C7, an eighth coil section C8, a ninth coil section C9, a tenth coil section C10, an eleventh coil section C11, and a twelfth coil section C12, which are arranged in the forward direction (clockwise direction) when viewed from above. The first coil section C1 is the portion wound around tooth T1, the twelfth coil section C12 is the portion wound around tooth T12, and so on, with the first coil section C1 to the twelfth coil section C12 corresponding one-to-one to teeth T1 to T12.

[0045] As shown in Figure 5, the first coil section C1 corresponds to the U- phase. Subsequently, the second coil section C2 corresponds to the U+ phase, the third coil section C3 to the W+ phase, the fourth coil section C4 to the W- phase, the fifth coil section C5 to the V- phase, and the sixth coil section C6 to the V+ phase. Furthermore, the seventh coil section C7 corresponds to the U+ phase, the eighth coil section C8 to the U- phase, the ninth coil section C9 to the W- phase, the tenth coil section C10 to the W+ phase, the eleventh coil section C11 to the V+ phase, and the twelfth coil section C12 to the V- phase. Thus, when viewing the stator unit 70 from above, the multiple coil sections C are arranged in a clockwise direction in the order of U-, U+, W+, W-, V-, V+, U+, U-, W-, W+, V+, V-.

[0046] The "+" sign for each phase indicates that, when viewing each of the coil sections C from the center CP of the main body 74, the winding direction of the conductor LW (Figure 4) to the teeth T is clockwise. The "-" sign for each phase indicates that, when viewing each of the coil sections C from the center CP, the winding direction of the conductor LW to the teeth T is counterclockwise. Figure 5 shows the distance L1 when the second coil section C2 wound around the teeth T2 is connected in such a way that the distance between the winding entry point (black circle in the figure) and the winding exit point (X mark in the figure) is minimized.

[0047] As shown in Figure 3, the brushless motor 60 has, for example, a total of 12 teeth T (Figure 4). In other words, the brushless motor 60 has a total of 12 slots. The rotor unit 62 has a 14-pole magnet MG. That is, the brushless motor 60 according to this embodiment is a "14-pole 12-slot type" brushless motor.

[0048] As shown in Figure 6, the U-phase, V-phase, and W-phase conductors LW are "delta connected". This simplifies the structure of the brushless motor 60 (Figure 3) because it eliminates the need for a coil or conductive member to form a neutral point, which is required in a "star connection". For delta connected conductors LW, U1 corresponds to the U-phase, U2 to the U+ phase, U7 to the U+ phase, U8 to the U- phase, V12 to the V- phase, V11 to the V+ phase, V6 to the V+ phase, V5 to the V- phase, W3 to the W+ phase, W4 to the W- phase, W9 to the W- phase, and W10 to the W+ phase.

[0049] As shown in Figure 7, the routing direction of the first wiring section LW1 from the first terminal 84 to the second terminal 86 and the routing direction of the third wiring section LW3 from the third terminal 88 to the first terminal 84 are aligned in the forward direction (to the right in Figure 7) toward one side in the circumferential direction of the main body section 74 (Figure 4). The routing direction of the second wiring section LW2 from the second terminal 86 to the third terminal 88 is in the reverse direction (to the left in Figure 7) toward the opposite side of the forward direction.

[0050] The first wiring section LW1 is routed from the first terminal 84 through the first coil section C1, the second coil section C2, the seventh coil section C7, and the eighth coil section C8, reaching the second terminal 86. The second wiring section LW2 is routed from the second terminal 86 through the twelfth coil section C12, the eleventh coil section C11, the sixth coil section C6, and the fifth coil section C5, reaching the third terminal 88. The third wiring section LW3 is routed from the third terminal 88 through the third coil section C3, the fourth coil section C4, the ninth coil section C9, and the tenth coil section C10, reaching the first terminal 84.

[0051] When viewing each of the coil sections C from the center CP (Figure 5) of the main body section 74, the winding direction of the conductor LW in the first coil section C1, the fourth coil section C4, the fifth coil section C5, the eighth coil section C8, the ninth coil section C9, and the twelfth coil section C12 is clockwise.

[0052] On the other hand, when viewing each of the coil sections C from the center CP, the winding direction of the conductor LW in the second coil section C2, the third coil section C3, the sixth coil section C6, the seventh coil section C7, the tenth coil section C10, and the eleventh coil section C11 is counterclockwise.

[0053] For example, in the second coil section C2, the distance in the winding direction from the winding entry position to the winding exit position is L1 (corresponding to distance L1 in Figure 5). Here, in the second coil section C2, if the winding direction is different, the winding entry position and winding exit position will be different, so the length of the connecting wire K will be different by at least an amount equivalent to distance L1. The same applies to the other coil sections C.

[0054] As shown in Figures 8, 9, and 10, the first terminal 84 of the U phase, the second terminal 86 of the V phase, and the third terminal 88 of the W phase are positioned at locations corresponding to a group of four teeth, consisting of teeth T1 (U-), teeth T2 (U+), and teeth T3 (W+) and teeth T12 (V-) which are adjacent to them in the circumferential direction, out of the 12 coil sections C (teeth T). A position corresponding to a group of teeth is a position that is radially aligned with at least a part of the group of teeth in a plan view.

[0055] As shown in Figure 8, three coil sections adjacent to each other in the circumferential direction of the main body 74, from the first coil section C1 to the twelfth coil section C12, are considered one coil group G. The stator unit 70 has a total of 12 coil groups G. Note that only one coil group G is shown in each of Figures 8 to 10, and the remaining 11 coil groups G are not shown. Coil groups G are indicated by dashed lines G.

[0056] Of the multiple (12 sets) coil groups G, the first coil group G1, which is radially aligned with the first terminal 84, includes the first coil section C1. Specifically, the first coil group G1 has an eleventh coil section C11, a twelfth coil section C12, and the first coil section C1. The first coil section C1 is the starting coil section C of the first wiring section LW1 extending from the first terminal 84.

[0057] As shown in Figure 9, the second coil group G2, which is radially aligned with the second terminal 86, includes the twelfth coil section C12. Specifically, the second coil group G2 has the twelfth coil section C12, the first coil section C1, and the second coil section C2. The twelfth coil section C12 is the starting coil section C of the second wiring section LW2 extending from the second terminal 86.

[0058] As shown in Figure 10, the third coil group G3, which is radially aligned with the third terminal 88, includes a third coil section C3. Specifically, the third coil group G3 has a first coil section C1, a second coil section C2, and a third coil section C3. The third coil section C3 is the starting coil section C of the third wiring section LW3 extending from the third terminal 88.

[0059] [Operation of the First Embodiment] As shown in Figure 7, according to the wiper motor 10, the first wiring section LW1 and the third wiring section LW3 are routed in the forward direction from the first terminal 84 and the second terminal 86.

[0060] On the other hand, the second wiring section LW2 is routed in the reverse direction from the second terminal 86. Therefore, near the second terminal 86 and the third terminal 88 of terminal 82, the jumper wire K2A extending in the reverse direction from the second terminal 86 and the jumper wire K2B heading toward the third terminal 88 of the second wiring section LW2 are less likely to intersect. Specifically, in the region S indicated by the dashed line, the jumper wires K2A and K2B are less likely to intersect. As a result, interference between the jumper wires K (K1, K2, K3) of the conductor LW can be suppressed compared to a configuration in which the first wiring section LW1, the second wiring section LW2, and the third wiring section LW3 are each routed in the forward direction.

[0061] According to the wiper motor 10, when viewing each coil section C from the center CP (Figure 5) of the main body 74, the winding direction of the conductor LW in the first coil section C1, the fourth coil section C4, the fifth coil section C5, the eighth coil section C8, the ninth coil section C9, and the twelfth coil section C12 is clockwise.

[0062] On the other hand, when viewed from the center CP, the winding direction of the conductor LW in the second coil section C2, the third coil section C3, the sixth coil section C6, the seventh coil section C7, the tenth coil section C10, and the eleventh coil section C11 is counterclockwise. In this way, by routing a single conductor LW and pre-setting the winding direction at each tooth T, it becomes possible to set the length of the jumper wire K1 shorter than that of the jumper wires K2 and K3. In other words, it becomes easier to set a shorter section of the jumper wire K in the conductor LW, and interference between the jumper wires K (K1, K2, K3) of the conductor LW can be suppressed.

[0063] As shown in Figure 8, the first coil group G1, which is radially aligned with the first terminal 84, includes the first coil section C1, which is wound first in the first wiring section LW1. Therefore, the distance of the conductor LW from the first terminal 84 to the first coil section C1 is shorter compared to a configuration in which the first coil group G1 does not include the first coil section C1. This makes it easier to start winding the first wiring section LW1 with a large tension applied, and thus suppresses slack in the conductor LW when it is hooked onto the teeth T1.

[0064] As shown in Figure 9, the second coil group G2, which is radially aligned with the second terminal 86, includes the 12th coil section C12, which is the first to be wound in the second wiring section LW2. Therefore, compared to a configuration in which the second coil group G2 does not include the 12th coil section C12, the distance of the conductor LW from the second terminal 86 to the 12th coil section C12 is shortened. This makes it easier to start winding with a large tension applied to the second wiring section LW2, and thus suppresses slack in the conductor LW when it is hooked onto the teeth T12.

[0065] As shown in Figure 10, the third coil group G3, which is radially aligned with the third terminal 88, includes the third coil section C3, which is wound first in the third wiring section LW3. Therefore, the distance of the conductor LW from the third terminal 88 to the third coil section C3 is shorter compared to a configuration in which the third coil group G3 does not include the third coil section C3. This makes it easier to start winding with a large tension applied to the third wiring section LW3, thereby suppressing slack in the conductor LW when it is hooked onto the teeth T3.

[0066] Furthermore, in the wiper motor 10, the crossing of the jumper wires K near the connection point of terminal 82 is mitigated, which suppresses slack in the conductor LW when winding it around the teeth T, and also improves the insulation and voltage resistance of the conductor LW between each phase.

[0067] Furthermore, in the wiper motor 10, a single conductor LW is connected in a delta configuration, eliminating the need for separate connection components such as busbars. This reduces the assembly process and the number of parts compared to a configuration using busbars, thereby lowering the cost of the wiper motor 10.

[0068] [Second Embodiment] A second embodiment of the present invention will be described below with reference to Figures 11 to 15. In Figures 11 to 15, components that are the same as or similar to those in the first embodiment are denoted by the same reference numerals, and redundant descriptions are omitted. Also, in Figures 11 to 15, the scale and dimensions of each component may be exaggerated, and some components may be omitted.

[0069] The wiper motor 90 of the second embodiment shown in Figure 11 is an example of a motor device equipped with a gear unit 20 and a motor body unit 40 (Figure 1). The wiper motor 90 differs from the wiper motor 10 (Figure 1) in that the stator unit 70 (Figure 3) is replaced with a stator unit 100. The configuration other than the stator unit 100 is the same as that of the wiper motor 10.

[0070] (Stator unit) As shown in Figure 11, the stator unit 100 includes a stator core 72, an insulator 76, a terminal 92, a first conductor LA, and a second conductor LB.

[0071] <Terminal> Terminal 92 is provided on the upper edge portion 77. Terminal 92 is a terminal portion that supplies current supplied at predetermined timings from a controller (not shown) to the first conductor LA and the second conductor LB. Specifically, terminal 92 comprises a first terminal 94 for the first phase, a second terminal 96 for the second phase, and a third terminal 98 for the third phase, which are arranged sequentially in the circumferential direction of the main body portion 74. For example, the first terminal 94, the second terminal 96, and the third terminal 98 are arranged within a range of a central angle of about 70° in the circumferential direction of the main body portion 74. Also, the first terminal 94, the second terminal 96, and the third terminal 98 are arranged at approximately equal intervals in the circumferential direction.

[0072] <First and second conductors> In Figure 11, the portions of the first conductor LA and the second conductor LB extending from terminal 92 to tooth T are shown as solid lines, and the portions returning from tooth T to terminal 92 are shown as dotted lines. Note that the first conductor LA and the second conductor LB are shown as straight lines to clearly illustrate their connection to terminal 92, but in reality they are routed in an arc along the insulator 76.

[0073] Figure 12 schematically shows the routing of the first conductor LA and the second conductor LB, and the winding state in multiple coil sections C. Note that Figure 12 shows the winding direction of the first conductor LA or the second conductor LB in each coil section C, and does not represent the number of turns of the first conductor LA or the second conductor LB in each coil section C. Terminals A1, A2, and A3 shown in Figure 12 are hypothetical terminals representing the connection between the right and left ends of the first conductor LA or the second conductor LB.

[0074] The first conductor LA and the second conductor LB each consist of a single conductive wire. In other words, the wiper motor 90 uses two conductors. The first conductor LA is shown as a solid line. The second conductor LB is shown as a dashed line. The first conductor LA connects the first terminal 94 to the second terminal 96 and also connects the second terminal 96 to the third terminal 98. The second conductor LB connects the third terminal 98 to the first terminal 94. The first conductor LA and the second conductor LB are routed along the circumferential direction of the main body 74 (Figure 11).

[0075] The first conductor LA includes, for example, a first wiring section LA1 connecting the first terminal 94 and the second terminal 96, and a second wiring section LA2 connecting the second terminal 96 and the third terminal 98. Note that the first wiring section LA1 and the second wiring section LA2 are names used to distinguish two parts of a single first conductor LA, and do not mean that there are two first conductors LA.

[0076] The second conductor LB includes, for example, the remaining third wiring section LB1. Thus, the first wiring section LA1 and the second wiring section LA2 are included in the first conductor LA. The third wiring section LB1 is included in the second conductor LB. Each of the first wiring section LA1, the second wiring section LA2, and the third wiring section LB1 has multiple coil sections C wound with a predetermined number of turns on each of multiple teeth T (Figure 11).

[0077] The first wiring section LA1 has a first jumper wire section KA that connects the first coil section C1, the second coil section C2, the seventh coil section C7, and the eighth coil section C8. In other words, the first jumper wire section KA is the remaining part of the first wiring section LA1, excluding the first coil section C1, the second coil section C2, the seventh coil section C7, and the eighth coil section C8.

[0078] The second wiring section LA2 has a second jumper wire section KB that connects the fifth coil section C5, the sixth coil section C6, the eleventh coil section C11, and the twelfth coil section C12. In other words, the second jumper wire section KB is the remaining part of the second wiring section LA2, excluding the fifth coil section C5, the sixth coil section C6, the eleventh coil section C11, and the twelfth coil section C12. Of the second wiring section LA2, the second jumper wire section KB from the second terminal 96 to the twelfth coil section C12 is designated as jumper wire K2A, and the second jumper wire section KB from the fifth coil section C5 to the third terminal 98 is designated as jumper wire K2B.

[0079] The third wiring section LB1 has a third jumper section KC that connects the third coil section C3, the fourth coil section C4, the ninth coil section C9, and the tenth coil section C10. In other words, the third jumper section KC is the remaining part of the third wiring section LB1, excluding the third coil section C3, the fourth coil section C4, the ninth coil section C9, and the tenth coil section C10.

[0080] The routing direction of the first wiring section LA1 from the first terminal 94 to the second terminal 96, and the routing direction of the third wiring section LB1 from the third terminal 98 to the first terminal 94, are aligned in the forward direction (to the right in Figure 12) toward one side in the circumferential direction of the main body section 74 (Figure 11). The routing direction of the second wiring section LA2 from the second terminal 96 to the third terminal 98 is in the reverse direction (to the left in Figure 12), toward the opposite side of the forward direction.

[0081] When viewing each of the coil sections C from the center CP (Figure 11) of the main body section 74, the winding direction of the conductor LW in the first coil section C1, the fourth coil section C4, the fifth coil section C5, the eighth coil section C8, the ninth coil section C9, and the twelfth coil section C12 is clockwise.

[0082] On the other hand, when viewing each of the coil sections C from the center CP, the winding direction of the conductor LW in the second coil section C2, the third coil section C3, the sixth coil section C6, the seventh coil section C7, the tenth coil section C10, and the eleventh coil section C11 is counterclockwise.

[0083] Figure 13 is an enlarged view of the stator unit 100 (Figure 11), showing the area around terminal 92. The 12th coil section C12 of the V phase and the 3rd coil section C3 of the W phase sandwich the 1st coil section C1 and the 2nd coil section C2 of the U phase in the circumferential direction of the main body 74. Here, the 12th coil section C12, the 1st coil section C1, the 2nd coil section C2, and the 3rd coil section C3 are referred to as the 4th coil group G4. Terminal 92 is located in the radial direction of the main body 74, opposite the 4th coil group G4.

[0084] As shown in Figure 14, the first conductor LA and the second conductor LB of the U, V, and W phases are "delta connected". This simplifies the structure of the wiper motor 90. The solid lines represent the actual wiring, while the dashed lines are virtual lines used to distinguish between the portion corresponding to the first conductor LA and the portion corresponding to the second conductor LB. For one first conductor LA, the position of the first terminal 94 is the winding start position, and after passing through the second terminal 96, the position of the third terminal 98 is the winding end position. For one second conductor LB, the position of the third terminal 98 is the winding start position, and the position of the first terminal 94 is the winding end position. In this way, the stator unit 100 uses two winding machines (flyers) (not shown) simultaneously to form multiple coil sections C of the first conductor LA and the second conductor LB. Note that the winding machine is not limited to a flyer type; for example, a nozzle type winding machine may also be used.

[0085] As shown in Figure 12, of the first wiring section LA1, the second wiring section LA2, and the third wiring section LB1, the first wiring section LA1 and the second wiring section LA2 are included in the first conductor LA. The third wiring section LB1 is included in the second conductor LB. Of the first jumper section KA, the second jumper section KB, and the third jumper section KC, the first jumper section KA and the second jumper section KB, which are included in the first conductor LA, are located on the other end side in the axial direction relative to the center of the stator core 72 (Figure 2). The third jumper section KC, which is included in the second conductor LB, is located on the one end side in the axial direction relative to the center of the stator core 72.

[0086] Figure 15 shows the trajectory of the flyer when the first conductor LA, which has the coil sections C (Figure 12) for the U-phase and V-phase, is routed along the upper part (other end in the axial direction) of the stator unit 100, indicated by arrow F1. Similarly, the trajectory of the flyer when the second conductor LB, which has the coil sections C for the W-phase, is routed along the lower part (one end in the axial direction) of the stator unit 100, indicated by arrow F2.

[0087] [Operation of the second embodiment] The operation of the wiper motor 90 of the second embodiment will be described with reference to Figures 11 to 15. Note that individual figure numbers are omitted.

[0088] Regarding the jumper wires K2A and K2B of the first conductor LA, interference between jumper wire K2A and jumper wire K2B can be suppressed, similar to the wiper motor 10 of the first embodiment. Furthermore, since the portion of the second conductor LB that is routed is offset on one side and the other side in the axial direction of the stator core 72 relative to the portion of the first conductor LA that is routed, interference between the jumper wires can be further reduced. Note that the "portion of the second conductor LB that is routed" is the portion of the third jumper section KC that is routed along the circumferential direction of the stator core 72. The "portion of the first conductor LA that is routed" is the portion of the first jumper section KA and the second jumper section KB that is routed along the circumferential direction of the stator core 72. Furthermore, since the first conductor LA and the second conductor LB can be wound using two flyers (winding machines), the time required to wind the first conductor LA and the second conductor LB can be reduced compared to when winding is done using a single flyer.

[0089] When winding with the second wire LB, time is required to move the flyer from one side to the other in the axial direction. Here, since the number of coil sections C formed by winding with the second wire LB is half the number of coil sections C (8) of the first wire LA (4), the difference in winding time between the first wire LA and the second wire LB can be reduced.

[0090] Specifically, in the process of winding the first conductor LA, the first conductor LA is hooked to the first terminal 94 of the U phase and wound around each tooth T of the U phase. Subsequently, the first conductor LA is hooked to the second terminal 96 of the V phase and wound around each tooth T of the V phase. Furthermore, the first conductor LA is hooked to the third terminal 98 of the W phase.

[0091] Meanwhile, in the process of winding the second conductor LB, the second conductor LB is hooked to the third terminal 98 of the W phase, routed on the opposite side of the axial direction from the third terminal 98, and wound around each tooth T of the W phase. Furthermore, the second conductor LB is routed on the same side of the axial direction as the third terminal 98 and hooked to the second terminal 96 of the V phase.

[0092] Thus, when winding two of the U, V, and W phases, the time required to form multiple coil sections (winding operation) is longer, but the time required to route the jumper wires is shorter. On the other hand, when winding one of the U, V, and W phases, the time required to form multiple coil sections (winding operation) is shorter, but the time required to route the jumper wires is longer. In this way, the total time required for winding and routing operations can be adjusted to be approximately the same for the first conductor LA and the second conductor LB.

[0093] The first conductor LA is wound starting from the first terminal 94, and the second conductor LB is wound starting from the third terminal 98. Here, the positions of the first terminal 94 and the third terminal 98 are further apart in the circumferential direction of the main body 74 compared to the positions of the first terminal 94 and the second terminal 96, or the positions of the second terminal 96 and the third terminal 98. This suppresses interference between the two winding machines when winding the first conductor LA and the second conductor LB onto the teeth T.

[0094] As a first modification of the stator unit 100 of the second embodiment, a stator unit 110 may be used, as shown in Figures 16 and 17. In the stator unit 110, the first terminal 94 of the U phase and the second terminal 96 of the V phase become the starting terminals for winding.

[0095] As a second modification of the stator unit 100 of the second embodiment, a stator unit 120 may be used, as shown in Figures 18 and 19. In the stator unit 120, the second terminal 96 of the V phase and the third terminal 98 of the W phase become the starting terminals for winding.

[0096] [Third Embodiment] A third embodiment of the present invention will be described below with reference to Figures 20 and 21. In Figures 20 and 21, components that are the same as or similar to those in the first and second embodiments are denoted by the same reference numerals, and redundant descriptions are omitted. Also, in Figures 20 and 21, the scale and dimensions of each component may be exaggerated, and some components may be omitted.

[0097] The wiper motor 130 of the third embodiment shown in Figure 20 is an example of a motor device equipped with a gear unit 20 and a motor body unit 40 (Figure 1). The wiper motor 130 differs from the wiper motor 10 (Figure 1) in that the stator unit 70 (Figure 3) is replaced with a stator unit 140. The configuration other than the stator unit 140 is the same as that of the wiper motor 10.

[0098] (Stator unit) The stator unit 140 includes a stator core 72, an insulator 76 (Figure 4), a terminal 92, and a conductor LW. Compared to the stator unit 70, the winding method of the conductor LW in the teeth T (from the first coil section C1 to the twelfth coil section C12) is different in the stator unit 140.

[0099] Furthermore, for multiple teeth T, those with adjacent and in-phase coils wound around the stator core 72 (Figure 4) in the circumferential direction are referred to as the first teeth TA and the second teeth TB. In other words, multiple teeth T include circumferentially adjacent and in-phase first teeth TA and second teeth TB (Figure 21). Teeth T1, T3, T5, T7, T9, and T11 are examples of first teeth TA. Teeth T2, T4, T6, T8, T10, and T12 are examples of second teeth TB.

[0100] The first wiring section LW1, the second wiring section LW2, and the third wiring section LW3 each have coil sections C1, C3, C5, C7, C9, and C11 wound around the first tooth TA, and coil sections C2, C4, C6, C8, C10, and C12 wound around the second tooth TB. Coil sections C1, C3, C5, C7, C9, and C11 are examples of one coil section. Coil sections C2, C4, C6, C8, C10, and C12 are examples of other coil sections.

[0101] Here, as an example, we will describe the 7th coil section C7 and the 8th coil section C8 within region SA, indicated by the dashed line, and the 9th coil section C9 and the 10th coil section C10 within region SB. The 1st coil section C1 and the 2nd coil section C2, the 3rd coil section C3 and the 4th coil section C4, the 5th coil section C5 and the 6th coil section C6, the 11th coil section C11 and the 12th coil section C12 have similar configurations except for the arrangement of the jumper wires, so we will omit their description.

[0102] Figure 21 schematically shows a state in which a portion of the conductor LW is wound around teeth T7 and T8. As mentioned above, tooth T7 is an example of the first tooth TA, and tooth T8 is an example of the second tooth TB. Of the conductor LW, the starting point of the seventh coil section C7, which is the portion wound around the first tooth TA (T7), is denoted as P1, and the ending point as P2. Of the conductor LW, the starting point of the eighth coil section C8, which is the portion wound around the second tooth TB (T8), is denoted as P3, and the ending point as P4. The other end face 72B is the surface located on the other end side in the axial direction of the stator core 72 relative to one end face 72A of the stator core 72.

[0103] The portion of the connecting wire K of the conductor LW that is routed along the circumferential direction of the stator core 72 is defined as the connecting section KS. The portion extending from the connecting section KS to the winding start section P1 is defined as the inlet section KM. The portion extending from the winding end section P2 of the seventh coil section C7 to the winding start section P3 of the eighth coil section C8 is defined as the intermediate connecting section KT. The portion extending from the winding end section P4 of the eighth coil section C8 to the connecting section KS is defined as the lead-out section KD. The connecting section KS, the inlet section KM, the intermediate connecting section KT, and the lead-out section KD are all included in the connecting wire K (conductor LW).

[0104] Of the conductor LW, the starting portion P1 of the winding of the seventh coil portion C7 onto the first tooth TA(T7) is located on the other axial end face 72B of the stator core 72. Of the conductor LW, the ending portion P2 of the winding of the seventh coil portion C7 onto the first tooth TA(T7) is located on the other axial end face 72B of the stator core 72. Of the conductor LW, the starting portion P3 of the winding of the eighth coil portion C8 onto the second tooth TB(T8) is located on one axial end face 72A of the stator core 72. Of the conductor LW, the ending portion P4 of the winding of the eighth coil portion C8 onto the second tooth TB(T8) is located on one axial end face 72A of the stator core 72. When viewed from the protruding direction of the first tooth TA(T7), the starting portion P1 and the ending portion P2 of the seventh coil portion C7 overlap. When viewed from the protruding direction of the second tooth TB(T8), the starting portion P3 and the ending portion P4 of the eighth coil section C8 overlap. The intermediate connecting portion KT extends from the other end face 72B through the space between the first tooth TA(T7) and the second tooth TB(T8) to one end face 72A and connects the seventh coil section C7 and the eighth coil section C8.

[0105] Figure 22 schematically shows another example in which a portion of the conductor LW is wound around teeth T9 and T10. As mentioned above, tooth T9 is an example of the first tooth TA, and tooth T10 is an example of the second tooth TB. Of the conductor LW, the starting point of winding the ninth coil section C9 onto the first tooth TA (T9) is designated as P5. Of the conductor LW, the ending point of winding the ninth coil section C9 onto the first tooth TA (T9) is designated as P6. Of the conductor LW, the starting point of winding the tenth coil section C10 onto the second tooth TB (T10) is designated as P7. Of the conductor LW, the ending point of winding the tenth coil section C10 onto the second tooth TB (T10) is designated as P8.

[0106] The portion extending from the connecting section KS to the winding start section P5 is designated as the entry section KN. The portion extending from the winding end section P6 of the 9th coil section C9 to the winding start section P7 of the 10th coil section C10 is designated as the intermediate connecting section KT. The portion extending from the winding end section P8 of the 10th coil section C10 to the connecting section KS is designated as the lead-out section KG. The connecting section KS, the entry section KN, the intermediate connecting section KT, and the lead-out section KG are all included in the connecting wire K (conductor wire LW).

[0107] Of the conductor LW, the starting portion P5 of the ninth coil section C9 for the first tooth TA(T9) is located on one end face 72A. Of the conductor LW, the ending portion P6 of the ninth coil section C9 for the first tooth TA(T9) is located on one end face 72A. Of the conductor LW, the starting portion P7 of the tenth coil section C10 for the second tooth TB(T10) is located on the other end face 72B. Of the conductor LW, the ending portion P8 of the tenth coil section C10 for the second tooth TB(T10) is located on the other end face 72B. When viewed from the protruding direction of the first tooth TA(T9), the starting portion P5 and ending portion P6 of the ninth coil section C9 overlap. When viewed from the protruding direction of the second tooth TB(T10), the starting portion P7 and ending portion P8 of the tenth coil section C10 overlap. The intermediate connecting section KT extends from one end face 72A through the space between the first tooth TA (T9) and the second tooth TB (T10) to the other end face 72B, and also connects the ninth coil section C9 and the tenth coil section C10.

[0108] <Explanation of the comparative example> A comparative example to the third embodiment will be described with reference to Figures 23 and 24. Components described previously may be denoted by the same reference numerals and their descriptions omitted. In Figures 23 and 24, the scale and dimensions of each component may be exaggerated, and some components may be omitted. Regarding the coil section C, a coil section C that is wrapped around three or more of the four outer edges of the teeth T is referred to as a 1-turn coil section C.

[0109] Figure 23 schematically shows a state in which a portion of the conductor wire LW is wound around teeth T7 and T8 as a first comparative example to the third embodiment (Figure 21). Of the conductor wire LW, the starting point of the seventh coil portion C7, which is the portion wound around the first tooth TA (T7), is designated as P1', and the ending point as P2'. Of the conductor wire LW, the starting point of the eighth coil portion C8, which is the portion wound around the second tooth TB (T8), is designated as P3', and the ending point as P4'.

[0110] In Figure 23, the starting portion P1' of the winding of the seventh coil portion C7 on the first tooth TA(T7) of the conductor LW is located on one axial end face 72A of the stator core 72. The ending portion P2' of the winding of the seventh coil portion C7 on the first tooth TA(T7) of the conductor LW is located on one axial end face 72A of the stator core 72. The starting portion P3' of the winding of the eighth coil portion C8 on the second tooth TB(T8) of the conductor LW is located on one axial end face 72A of the stator core 72. The ending portion P4' of the winding of the eighth coil portion C8 on the second tooth TB(T8) is located on one axial end face 72A of the stator core 72. When viewed from the protruding direction of the first tooth TA(T7), the starting portion P1' and the ending portion P2' of the seventh coil portion C7 do not overlap. When viewed from the protruding direction of the second tooth TB(T8), the starting portion P3' and ending portion P4' of the eighth coil section C8 overlap. The intermediate connecting portion KT is routed along one end face 72A and connects the seventh coil section C7 and the eighth coil section C8.

[0111] As shown in Figure 23, in the first comparative example, the conductor LW is drawn from one end of the stator core 72 between tooth T6 and the first tooth TA(T7). Furthermore, after being wound around the first tooth TA(T7), the conductor LW is wound around the second tooth TB(T8) and then drawn out from between the second tooth TB(T8) and tooth T9 to one end of the stator core 72. Note that in Figure 23, the seventh coil section C7 is shown as having been wound two turns.

[0112] In the first comparative example, as described above, the length of the conductor LW in the seventh coil section C7 and the eighth coil section C8 are different due to the winding of the seventh coil section C7 and the eighth coil section C8. Specifically, the last turn of the seventh coil C7 is shorter by the length of one side of the outer circumference of the teeth T compared to the eighth coil C8. As a result, the magnetomotive force of the seventh coil section C7 and the eighth coil section C8 becomes uneven, which may cause an imbalance in the magnetic balance.

[0113] Furthermore, in the first comparative example, when viewed from the protruding direction of the first tooth TA(T7), the starting portion P1' and the ending portion P2' of the seventh coil section C7 do not overlap. As a result, the seventh coil section C7 may not be tightly wound, potentially causing the conductor LW to loosen.

[0114] Figure 24 schematically shows a second comparative example to the third embodiment (Figure 22), in which a portion of the conductor wire LW is wound around teeth T9 and T10. Of the conductor wire LW, the starting point of the ninth coil portion C9, which is the portion wound around the first tooth TA (T9), is designated as P5', and the ending point as P6'. Of the conductor wire LW, the starting point of the tenth coil portion C10, which is the portion wound around the second tooth TB (T10), is designated as P7', and the ending point as P8'.

[0115] In Figure 24, the starting portion P5' of the winding of the ninth coil section C9 onto the first tooth TA(T9) of the conductor LW is located at one end face 72A. The ending portion P6' of the winding of the ninth coil section C9 onto the first tooth TA(T9) of the conductor LW is located at one end face 72A. The starting portion P7' of the winding of the tenth coil section C10 onto the second tooth TB(T10) of the conductor LW is located at one end face 72A. The ending portion P8' of the winding of the tenth coil section C10 onto the second tooth TB(T10) of the conductor LW is located at one end face 72A. When viewed from the protruding direction of the first tooth TA(T9), the starting portion P5' and the ending portion P6' of the winding of the ninth coil section C9 overlap. When viewed from the protruding direction of the second tooth TB (T10), the starting portion P7' and ending portion P8' of the tenth coil section C10 do not overlap. The intermediate connecting portion KT is routed along the circumferential direction of the stator core 72 on one end face 72A, connecting the seventh coil section C7 and the eighth coil section C8.

[0116] As shown in Figure 24, in the second comparative example, the conductor LW is drawn from one end of the stator core 72 between tooth T8 and the first tooth TA(T9). Furthermore, after being wound around the first tooth TA(T9), the conductor LW is wound around the second tooth TB(T10) and then drawn out from between the second tooth TB(T10) and tooth T11 to one end of the stator core 72. Note that in Figure 24, the tenth coil section C10 is shown as having been wound two turns.

[0117] In the second comparative example, as described above, the ninth coil section C9 and the tenth coil section C10 are wound in such a way that the length of the conductor LW in the ninth coil section C9 and the length of the conductor LW in the tenth coil section C10 are different. Specifically, the last turn of the tenth coil C10 is shorter than that of the ninth coil C9 by the length of one side of the outer circumference of the teeth T. As a result, the magnetomotive force of the ninth coil section C9 and the tenth coil section C10 becomes uneven, which may cause an imbalance in the magnetic balance.

[0118] Furthermore, in the second comparative example, when viewed from the protruding direction of the second tooth TB(T10), the starting portion P7' and the ending portion P8' of the tenth coil section C10 do not overlap. As a result, the tenth coil section C10 may not be tightly wound, potentially causing the conductor LW to loosen.

[0119] [Operation of the third embodiment] The operation of the wiper motor 130 in the third embodiment will be described with reference to Figures 21 and 22. Components identical or similar to those in the first and second embodiments are denoted by the same reference numerals and their descriptions are omitted.

[0120] As shown in Figure 21, the conductor LW is drawn in from the other end of the stator core 72 between the first tooth TA(T7) and the second tooth TB(T8). Furthermore, after being wound around the first tooth TA(T7), the conductor LW is wound around the second tooth TB(T8) and then drawn out from between the first tooth TA(T7) and the second tooth TB(T8) to one end of the stator core 72.

[0121] In the wiper motor 130, as described above, the length of the wire LW in the seventh coil section C7 and the eighth coil section C8 are made uniform. As a result, the magnetomotive force of the seventh coil section C7 and the eighth coil section C8 becomes uniform, and the bias in the magnetic balance is suppressed. This improves the variability of the motor characteristics of the wiper motor 130 and reduces the operating noise of the wiper motor 130.

[0122] Furthermore, when viewed from the protruding direction of the first tooth TA (T7), the starting portion P1 and the ending portion P2 of the seventh coil section C7 overlap. Also, when viewed from the protruding direction of the second tooth TB (T8), the starting portion P3 and the ending portion P4 of the eighth coil section C8 overlap. As a result, slack in the conductor LW at the starting and ending portions of the seventh coil section C7 and the eighth coil section C8 is reduced. In other words, the tighter winding of the conductor LW makes it easier to apply tension to the jumper wire K, thus suppressing damage to the conductor LW due to slack in the jumper wire K, as well as insulation failure or voltage resistance failure.

[0123] As shown in Figure 22, the conductor LW is drawn from one end of the stator core 72 between the first tooth TA(T9) and the second tooth TB(T10). Furthermore, after being wound around the first tooth TA(T9), the conductor LW is wound around the second tooth TB(T10), drawn out from between the first tooth TA(T9) and the second tooth TB(T10) to the other axial end of the stator core 72, and then routed to the one axial end.

[0124] In the wiper motor 130, as described above, the ninth coil section C9 and the tenth coil section C10 are wound in such a way that the length of the conductor LW of the ninth coil section C9 and the length of the conductor LW of the tenth coil section C10 become uniform. As a result, compared to the first and second comparative examples, the magnetomotive force of the ninth coil section C9 and the tenth coil section C10 becomes uniform, and the bias in magnetic balance is suppressed. This improves the variation in the motor characteristics of the wiper motor 130 and reduces the operating noise of the wiper motor 130.

[0125] Furthermore, when viewed from the protruding direction of the first tooth TA (T9), the starting portion P5 and the ending portion P6 of the ninth coil section C9 overlap. Also, when viewed from the protruding direction of the second tooth TB (T10), the starting portion P7 and the ending portion P8 of the tenth coil section C10 overlap. As a result, the loosening of the conductor LW at the starting and ending portions of the ninth coil section C9 and the tenth coil section C10 is reduced. In other words, the tighter winding of the conductor LW makes it easier to apply tension to the jumper wire K, thereby suppressing damage to the conductor LW due to loosening of the jumper wire K, and also suppressing insulation failure or voltage resistance failure.

[0126] <Modified form of this embodiment> It goes without saying that the present invention is not limited to the embodiments described above, and may be implemented in various different forms within the scope of its technical concept. Modifications will be described below.

[0127] The first wiring section LW1 does not have to be routed in the order of first coil section C1, second coil section C2, seventh coil section C7, and eighth coil section C8 from the first terminal 84. The second wiring section LW2 does not have to be routed in the order of twelfth coil section C12, eleventh coil section C11, sixth coil section C6, and fifth coil section C5 from the second terminal 86. The third wiring section LW3 does not have to be routed in the order of third coil section C3, fourth coil section C4, ninth coil section C9, and tenth coil section C10 from the third terminal 88.

[0128] When viewing each of the coil sections C from the center CP of the main body 74, the winding direction of the conductor LW in the first coil section C1, the fourth coil section C4, the fifth coil section C5, the eighth coil section C8, the ninth coil section C9, and the twelfth coil section C12 does not have to be clockwise. Also, the winding direction of the conductor LW in the second coil section C2, the third coil section C3, the sixth coil section C6, the seventh coil section C7, the tenth coil section C10, and the eleventh coil section C11 does not have to be counterclockwise.

[0129] Among multiple coil groups G, the first coil group G1 may include the first coil section C1, the second coil group G2 may not include the twelfth coil section C12, and the third coil group G3 may not include the third coil section C3. The first coil group G1 may not include the first coil section C1, the second coil group G2 may include the twelfth coil section C12, and the third coil group G3 may not include the third coil section C3. The first coil group G1 may not include the first coil section C1, the second coil group G2 may not include the twelfth coil section C12, and the third coil group G3 may include the third coil section C3.

[0130] The first coil group G1 may include the first coil section C1, the second coil group G2 may include the twelfth coil section C12, and the third coil group G3 may not include the third coil section C3. The first coil group G1 may not include the first coil section C1, the second coil group G2 may include the twelfth coil section C12, and the third coil group G3 may include the third coil section C3. The first coil group G1 may include the first coil section C1, the second coil group G2 may not include the twelfth coil section C12, and the third coil group G3 may include the third coil section C3.

[0131] In the above embodiment, the brushless motor 60 is shown as a "14-pole, 12-slot type" brushless motor, but it is also possible to set it to a "10-pole, 12-slot type". Furthermore, it may be set to other numbers of poles and other numbers of slots.

[0132] The motor device is not limited to wiper motors 10 (brushless motors 60), 90, and 130, but may also be a brushless sunroof motor, brushless power window motor, brushless power seat motor, etc.

[0133] The first conductor LA may include a first crossover section KA and a third crossover section KC, and the second conductor LB may include a second crossover section KB. In this case, the first crossover section KA and the third crossover section KC are located on one end in the axial direction, and the second crossover section KB is located on the other end in the axial direction.

[0134] The first conductor LA may include the second jumper section KB and the third jumper section KC, and the second conductor LB may include the first jumper section KA. In this case, the second jumper section KB and the third jumper section KC are located on one end in the axial direction, and the first jumper section KA is located on the other end in the axial direction.

[0135] According to the first, second, and third embodiments or each of the modified forms, the assembly process of the parts is reduced as described above, thereby saving manufacturing energy and suppressing the generation of greenhouse gases. Furthermore, variations in the size of multiple coil sections C from product to product are suppressed, thereby reducing the occurrence of defective products. This makes it possible to achieve the United Nations Sustainable Development Goals (SDGs), particularly Goal 7 (Ensure access to affordable, reliable, sustainable, and modern energy for all) and Goal 13 (Take urgent action to combat climate change and its impacts). [Explanation of Symbols]

[0136] 10... Wiper motor, 20... Gear section, 22... Gear housing, 24... Gear housing section, 26... Base plate mounting section, 28... Helical gear, 29... Bearing section, 32... Shaft fixing section, 34... Sensor magnet, 36... Bearing member housing section, 38... Backup member, 40... Motor body section, 42... Motor housing, 44... Motor housing section, 45... Bottom wall, 46... Fixing wall, 47... Side wall, 47A... Flange, 48... Base mounting section, 52... Sensor substrate, 54... Holding member, 56... Base plate, 60... Brushless motor, 62... Rotor unit, 64... Rotor body, 64A... Rotor bottom Wall, 64B…Rotor side wall, 64C…Boss part, 65…Inner surface, 66…Pinion gear, 70…Stator unit, 72…Stator core, 72A…One end face, 72B…Other end face, 74…Main body part, 75…Fixing part, 76…Insulator, 77…Upper edge part, 82…Terminal, 84…First terminal, 86…Second terminal, 88…Third terminal, 90…Wiper motor, 92…Terminal, 94…First terminal, 96…Second terminal, 98…Third terminal, 100…Stator unit, 110…Stator unit, 120…Stator unit, 130…Wiper motor, 140…Stator unit, A1…End Child, A2...Terminal, A3...Terminal, B1...First bearing, B2...Second bearing, B3...Third bearing, C...Coil section, C1...First coil section, C2...Second coil section, C3...Third coil section, C4...Fourth coil section, C5...Fifth coil section, C6...Sixth coil section, C7...Seventh coil section, C8...Eighth coil section, C9...Ninth coil section, C10...Tenth coil section, C11...Eleventh coil section, C12...Twelfth coil section, CA...Central axis, CB...Central axis, CP...Center, G...Coil group, G1...First coil group, G2...Second coil group, G3...Third coil group, G4...Fourth coil group Loop, HS1...Hall sensor, HS2...Hall sensor, K...Jumper wire, K1...Jumper wire, K2...Jumper wire, K2A...Jumper wire, K2B...Jumper wire, K3...Jumper wire, KA...First jumper wire section, KB...Second jumper wire section, KC...Third jumper wire section, KD...Outlet section, KG...Outlet section, KM...Inlet section, KN...Inlet section, KS...Jumper section, KT...Intermediate jumper section, L1...Distance, LA...First conductor, LA1...First wiring section, LA2...Second wiring section, LB...Second conductor, LB1...Third wiring section, LW...Conductor, LW1...First wiring section, LW2...Second wiring section, LW3...Third wiring section, MG...Magnet, P1...Starting winding section,P2...end of winding, P3...beginning of winding, P4...end of winding, P5...beginning of winding, P6...end of winding, P7...beginning of winding, P8...end of winding, P1'...beginning of winding, P2'...end of winding, P3'...beginning of winding, P4'...end of winding, P5'...beginning of winding, P6'...end of winding, P7'...beginning of winding, P8'...end of winding, S...area, S1...fixing screw, SA...area, SB...area, SH1...rotating shaft, SH2...output shaft, T...teeth, T1...teeth, T2...teeth, T3...teeth, T4...teeth, T5...teeth, T6...teeth, T7...teeth, T8...teeth, T9...teeth, T10...teeth, T11...teeth, T12...teeth, TA...first tooth, TB...second tooth,

Claims

1. A stator core comprising a cylindrical body portion and a plurality of teeth protruding radially outward from the body portion, and facing the rotor body in the radial direction, A conductor routed along the circumferential direction of the main body, The terminal comprises a first terminal of the first phase, a second terminal of the second phase, and a third terminal of the third phase, which are arranged sequentially in the circumferential direction, and is located on one end face in the axial direction of the stator core, and supplies current to the conductor, It has, The conductor has a first wiring section connecting the first terminal and the second terminal, a second wiring section connecting the second terminal and the third terminal, and a third wiring section connecting the third terminal and the first terminal. Each of the first wiring section, the second wiring section, and the third wiring section has a plurality of coil sections wound around the plurality of teeth, The routing direction of the first wiring section from the first terminal to the second terminal and the routing direction of the third wiring section from the third terminal to the first terminal are aligned in the forward direction toward one side of the circumferential direction. The routing direction of the second wiring section from the second terminal to the third terminal is the reverse direction, opposite to the forward direction. The first wiring section has a first jumper wire section that connects a plurality of the coil sections, The second wiring section has a second jumper wire section that connects a plurality of the coil sections, The third wiring section has a third connecting wire section that connects a plurality of the coil sections, The aforementioned conductor has two conductors, a first conductor and a second conductor. Of the first, second, and third wiring sections, any two are formed by the first conductor, and the remaining wiring section is formed by the second conductor. Of the first, second, and third connecting wire sections, the two connecting wire sections formed by the first conductor are located on the side of one end face of the stator core, and the one connecting wire section formed by the second conductor is located on the opposite side of the one end face in the axial direction. A motor device characterized by the following features.

2. The plurality of coil sections have a first coil section, a second coil section, a third coil section, a fourth coil section, a fifth coil section, a sixth coil section, a seventh coil section, an eighth coil section, a ninth coil section, a tenth coil section, an eleventh coil section, and a twelfth coil section, arranged in the forward direction. The first wiring section is routed from the first terminal in the order of the first coil section, the second coil section, the seventh coil section, and the eighth coil section. The second wiring section is routed from the second terminal in the order of the 12th coil section, the 11th coil section, the 6th coil section, and the 5th coil section. The third wiring section is routed from the third terminal in the order of the third coil section, the fourth coil section, the ninth coil section, and the tenth coil section. When viewing each of the multiple coil sections from the center of the main body, The winding direction of the conductor in the first coil section, the fourth coil section, the fifth coil section, the eighth coil section, the ninth coil section, and the twelfth coil section is clockwise. The winding direction of the conductor in the second coil section, the third coil section, the sixth coil section, the seventh coil section, the tenth coil section, and the eleventh coil section is counterclockwise. The motor device according to feature 1.

3. Three coils from the first coil section to the twelfth coil section that are adjacent in the circumferential direction are treated as one coil group. Among the multiple coil groups, the first coil group aligned radially with the first terminal includes the first coil portion. The motor device according to feature 2.

4. Of the multiple coil groups, the second coil group aligned radially with the second terminal includes the 12th coil portion. The motor device according to feature 3.

5. Of the multiple coil groups, the third coil group aligned radially with the third terminal includes the third coil portion. The motor device according to feature 4.

6. The first wiring section and the second wiring section are included in the first conductor, and the third wiring section is included in the second conductor. The motor device according to claim 1.

7. A stator core comprising a cylindrical body portion and a plurality of teeth protruding radially outward from the body portion, and facing the rotor body in the radial direction, A conductor routed along the circumferential direction of the main body, The terminal comprises a first terminal of the first phase, a second terminal of the second phase, and a third terminal of the third phase, which are arranged sequentially in the circumferential direction, and is located on one end face in the axial direction of the stator core, and supplies current to the conductor, It has, The conductor has a first wiring section connecting the first terminal and the second terminal, a second wiring section connecting the second terminal and the third terminal, and a third wiring section connecting the third terminal and the first terminal. The first wiring section, the second wiring section, and the third wiring section are formed from a single conductor, or the first wiring section and the second wiring section are formed from a single conductor and the third wiring section is formed from a single conductor. Each of the first wiring section, the second wiring section, and the third wiring section is: Multiple coil sections wound around the aforementioned multiple teeth, A connecting portion is provided between the terminal and the coil portion, and between the coil portions themselves, and is routed along the circumferential direction. It has, The routing direction of the connecting portion of the first wiring section and the routing direction of the connecting portion of the third wiring section are aligned in the forward direction toward one side of the circumferential direction. The routing direction of the connecting portion of the second wiring section is the reverse direction, which is opposite to the forward direction. The plurality of coil sections have a first coil section, a second coil section, a third coil section, a fourth coil section, a fifth coil section, a sixth coil section, a seventh coil section, an eighth coil section, a ninth coil section, a tenth coil section, an eleventh coil section, and a twelfth coil section, arranged in the forward direction. The first wiring section is routed from the first terminal in the order of the first coil section, the second coil section, the seventh coil section, and the eighth coil section. The second wiring section is routed from the second terminal in the order of the 12th coil section, the 11th coil section, the 6th coil section, and the 5th coil section. The third wiring section is routed from the third terminal in the order of the third coil section, the fourth coil section, the ninth coil section, and the tenth coil section. When viewing each of the multiple coil sections from the center of the main body, The winding direction of the conductor in the first coil section, the fourth coil section, the fifth coil section, the eighth coil section, the ninth coil section, and the twelfth coil section is clockwise. The winding direction of the conductor in the second coil section, the third coil section, the sixth coil section, the seventh coil section, the tenth coil section, and the eleventh coil section is counterclockwise. The plurality of teeth include first teeth and second teeth on which the coil portions are wound, and which are adjacent to each other in the circumferential direction and in the same phase. The first wiring section, the second wiring section, and the third wiring section each have one coil section wound around the first tooth and another coil section wound around the second tooth. Of the aforementioned conductors, the starting and ending portions of one of the coil sections wound onto the first tooth are located on either one of the axial end faces and the other end face of the stator core, and are located between the first tooth and the second tooth in the circumferential direction. Of the aforementioned conductors, the starting and ending portions of the other coil sections wound onto the second teeth are located on either the axial end face or the other end face of the stator core, and are located between the first teeth and the second teeth in the circumferential direction. The aforementioned conductor is An intermediate connecting portion extending from either the one end face or the other end face through the space between the first teeth and the second teeth to the other end face, and connecting one coil portion to the other coil portion, An entry portion extending from the connecting portion to the starting portion of the first coil, A lead-out portion extending from the winding end portion of the other coil to the connecting portion, It has, The aforementioned entry portion extends in the same direction as the winding direction of the conductor in the first coil portion. The aforementioned extension portion extends in the same direction as the winding direction of the conductor in the other coil portion. A motor device characterized by the following features.

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