Motor

Abstract

To provide a motor that can improve ease of assembly of conductors to a substrate.SOLUTION: A motor of the embodiment has a substrate 2 having a substrate-side first recess 21 and a substrate-side second recess 22, which are recessed inward in a radial direction from an outer circumferential edge and in which ends of the conductive wires 14 are located inside, and a land 30 that is conductive and connected to the conductive wires 14. The land 30 has a first land part 31 disposed along each substrate-side first recess 21 and substrate-side second recess 22 on a surface side of a substrate body 20, a second land part 32 disposed along each substrate-side first recess 21 and substrate-side second recess 22 on a back face side of the substrate body 20, and a third land part 33 disposed on the inner peripheral surface of each substrate-side first recess 21 and substrate-side second recess 22. The first land part 31, the second land part 32, and the third land part 33 are connected.SELECTED DRAWING: Figure 15

Description

Technical Field

[0001] The present invention relates to a motor.

Background Art

[0002] Conventionally, a motor has a plurality of stator cores, and both ends of a conducting wire wound around each stator core are physically and electrically connected to a connection member such as a bus bar or a substrate (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when the connection member is a substrate, for example, after passing the end of the conducting wire through a through hole provided in the substrate and then soldering and connecting it to a land on the substrate, there is room for improvement from the viewpoint of the assemblability of the conducting wire to the substrate.

[0005] An example of a problem of the present invention is to provide a motor capable of improving the assemblability of a conducting wire to a substrate.

Means for Solving the Problems

[0006] A motor according to an aspect of the present invention includes a stator having a magnetic body and a conducting wire wound around the magnetic body, and an annular substrate provided on the stator. It is. The substrate It has a first recess, a second recess, and a land. The first recess is recessed from an outer peripheral end radially inward, and first the end of the conducting wire is disposed inside. 。 The second recess is recesses inward in the radial direction from the outer peripheral end, and the second end portion of the conductor is disposed inside. The land conductive and is connected to the conducting wire. 。 The land is on the surface side of the substrate and thefirst Recessed portion and the second recess A first land disposed along the portion and, on the back side of the substrate, the first recess and the second A second land disposed along the recess portion and the inner peripheral surface of the first recess and the second A third land disposed on the inner peripheral surface of the recess portion and has It does. The first land portion includes a part electrically connected to the first end portion of the conductor and another part electrically connected to the second end portion of the conductor. In the circumferential direction, one of a part of the adjacent first land portion and the other part of the first land portion extends toward the other, and the other extends toward the one. The first land a part of the portion and the second land a part of the portion and the third land a part of the portion communicate with each other. The other part of the first land portion, the other part of the second land portion, and the other part of the third land portion communicate with each other. The first land portion has a larger area than the second land portion and the third land portion.

[0007] According to one aspect of the present invention, the assemblability of the conducting wire to the substrate can be improved.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11A

Figure 11B

Figure 12A

Figure 12B

Figure 13A

Figure 13B

Figure 14A

Figure 14B

Figure 14C

Figure 15

Figure 16

Figure 17A

Figure 17B

Figure 18

MODE FOR CARRYING OUT THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited by the embodiments shown below. Also, the dimensional relationships of the elements in the drawings, the ratios of the elements, etc. may be different from reality. Further, even between the drawings, there may be portions where the dimensional relationships and ratios of each other are different. In addition, the content described in one embodiment or modification example is generally applied to other embodiments and modification examples as well.

[0010] (Embodiment) FIG. 1 is an external perspective view of a stator according to an embodiment. FIG. 2 is a partially exploded perspective view of the stator. FIG. 3 is a longitudinal sectional view of the stator. FIG. 4 is an external perspective view of a split core constituting the stator. FIG. 5 is an enlarged plan view of a connection portion between the split core and a substrate. FIG. 6 is a partially exploded perspective view of the split core. FIG. 7 is a schematic sectional view of an insulator and a coil constituting the split core. FIG. 8 is a schematic sectional view of adjacent split cores. FIG. 9 is a longitudinal sectional view of the insulator. FIG. 10 is a schematic diagram showing a change in the position of a conducting wire when a substrate is assembled to the split core. FIG. 11A is an enlarged side view of a connection portion between the split core and the substrate. FIG. 11B is a schematic diagram showing an example of a soldering state of the conducting wire to a substrate recess.

[0011] In the following description, for convenience, the axial direction shown in the drawings is the rotation axis direction of the motor in the present embodiment. Of the axial directions, one is the first direction and the other is the second direction. The radial direction shown in the drawings is the radial direction orthogonal to the rotation axis direction of the motor in the present embodiment. Of the radial directions, the direction away from the rotation axis X shown in the drawings is the outer radial direction, and the direction toward the rotation axis X is the inner radial direction. The circumferential direction shown in the drawings is the direction coinciding with the rotation direction of the motor in the present embodiment.

[0012] The stator 1 according to the embodiment is applied to, for example, an inner rotor type brushless motor or the like. The motor of the present embodiment includes an inner rotor as a rotor, a shaft fixed to the inner rotor, a stator 1 having a coil and a magnetic body around which the coil is wound, and an annular substrate 2 provided on the stator 1. Note that the motor to which the stator 1 is applied is not limited to a brushless motor.

[0013] The stator 1 shown in FIG. 1 is arranged so as to surround an inner rotor (not shown). As shown in FIG. 4, the stator 1 includes a plurality of divided cores 10 as so-called divided cores. The stator 1 is formed by arranging a plurality of divided cores 10 in an annular shape along the circumferential direction and joining and integrating adjacent divided cores 10. As shown in FIG. 2, the stator 1 has an annular substrate 2 formed on the first direction side in the axial direction. The plurality of divided cores 10 are integrated by insert molding, for example, in a state of being arranged in an annular shape along the circumferential direction.

[0014] As shown in FIGS. 3 and 4, the divided core 10 includes a stator core 11, an insulator 12, and a coil 13 surrounding the stator core 11 via the insulator 12.

[0015] The stator core 11 is a magnetic body having a laminated structure in which, for example, a plurality of electromagnetic steel sheets are laminated. The plurality of stator cores 11 are arranged in an annular shape along the circumferential direction. The stator core 11 has a tooth portion 11a and a yoke portion 11b. The tooth portion 11a extends radially inward from the inner peripheral side of the yoke portion 11b. As shown in FIG. 8, the yoke portion 11b is circumferentially connected to adjacent yoke portions 11b in a state where the plurality of divided cores 10 are arranged in an annular shape along the circumferential direction.

[0016] The insulator 12 is formed of, for example, an insulator and is interposed between the stator core 11 and the coil 13 to electrically insulate them. As shown in FIG. 6, the insulator 12 has a housing portion 121 that houses the stator core 11 therein and a wall portion 122 formed at an end portion on the radially outer side of the housing portion 121. The insulator 12 is formed so as to be dividable into two parts, and can house the stator core 11 therein in a divided state.

[0017] The wall portion 122 is located on the outer peripheral side of the substrate 2 in a state where the substrate 2 is assembled to the stator 1. When viewed in the radial direction, the wall portion 122 is formed in a substantially rectangular shape and protrudes from the yoke portion 11b in the axial direction. The wall portion 122 has two recesses that face each other in the radial direction at the positions where the two lead wires 14 drawn out from the coil 13 are drawn out. Specifically, as shown in FIG. 9, the wall portion 122 has an insulator-side first recess 126 and an insulator-side second recess 127.

[0018] The insulator-side first recess 126 (third recess) is formed corresponding to one of the lead wire 14 extraction positions, and the one lead wire 14 is disposed inside from a direction intersecting the extending direction of the one lead wire 14. The insulator-side second recess 127 (fourth recess) is formed corresponding to the other of the lead wire 14 extraction positions, and the other lead wire 14 is disposed inside from a direction intersecting the extending direction of the other lead wire 14. The insulator-side first recess 126 and the insulator-side second recess 127 are formed at positions facing the extraction positions of the lead wires 14 respectively drawn out from the coil 13 in the split core 10 as shown in FIGS. 5 and 11A. Specifically, the insulator-side first recess 126 is formed at a position facing the first end portion 141 of the lead wire 14 drawn out from the coil 13 in the split core 10. The insulator-side second recess 127 is formed at a position facing the second end portion 142 of the lead wire 14 drawn out from the coil 13 in the split core 10. An insulator-side convex portion 128 is formed between the insulator-side first recess 126 and the insulator-side second recess 127 in the circumferential direction. The insulator-side convex portion 128 extends outward without protruding from the end portion in the first direction in the axial direction of the wall portion 122. The insulator-side convex portion 128 faces the substrate convex portion 23 in the axial direction in the assembled state where the substrate 2 is assembled to the stator 1.

[0019] Further, the insulator-side first recess 126 and the insulator-side second recess 127 face the substrate-side first recess 21 and the substrate-side second recess 22 of the substrate 2, respectively, in the assembled state where the substrate 2 is assembled to the stator 1. Specifically, the insulator-side first recess 126 faces the substrate-side first recess 21 in the assembled state where the substrate 2 is assembled to the stator 1. The insulator-side second recess 127 faces the substrate-side second recess 22 in the assembled state where the substrate 2 is assembled to the stator 1. The insulator-side first recess 126 and the insulator-side second recess 127 form a space for allowing the first end portion 141 and the second end portion 142 of the lead wire 14 to escape radially outward when connecting the lead wire 14 drawn from the coil 13 to the substrate 2. The substrate-side first recess 21 and the substrate-side second recess 22 of the substrate 2 form a space for joining the first end portion 141 and the second end portion 142 of the lead wire 14 to the substrate 2 side when connecting the lead wire 14 drawn from the coil 13 to the substrate 2.

[0020] The accommodating portion 121 is formed in a rectangular cylindrical shape when viewed in the radial direction, and the tooth portion 11a is accommodated inside in the assembled state where the insulator 12 is assembled to the stator core 11 (FIG. 6). The accommodating portion 121 has four outer surfaces 125 on the outer peripheral surface. The outer surface 125 has the lead wire 14 wound around it. The outer surface 125 is surrounded by a plurality of layers of coils 13. The outer surface 125 of the present embodiment is surrounded by two layers of coils 13 as shown in FIGS. 7 and 8. Among the four outer surfaces 125, the two surfaces on both sides in the circumferential direction are composed of only flat surfaces, and the two surfaces on both sides in the axial direction are composed of a plurality of recesses 130 and flat surfaces 131. In the present embodiment, a plurality of recesses and flat surfaces 131 are formed on the two surfaces, but they may be formed on at least one or more surfaces.

[0021] The plurality of recesses 130 are formed on two of the four outer surfaces 125 of the accommodating portion 121 on both axial sides, on the radially outer side. Each recess 130 is arranged continuously along the radial direction. Each recess 130 is, for example, a portion that protrudes toward the first direction side in the axial direction and is surrounded by two convex portions 132 adjacent in the radial direction. Each recess 130 stores the conductor 14 wound around the insulator 12. The conductors 14 wound around the plurality of recesses 130 are regulated in position by each recess 130 and are arranged evenly and in a lattice pattern along the teeth portion 11a of the stator core 11, as shown in FIG. 7.

[0022] The flat surface 131 is formed on two of the four outer surfaces 125 of the accommodating portion 121 on both axial sides, on the radially inner side (FIG. 7). The flat surface 131 is formed on the outer surface 125 where the plurality of recesses 130 are formed on the radially outer side, on the radially inner side, and is a flat surface where no recess 130 is formed. The radial length of the flat surface 131 is set to be longer than the outer diameter length of the conductor 14.

[0023] A part of the conductor 14 wound around the flat surface 131 is radially spaced apart between adjacent conductors 14 in the first layer of the coil 13. Specifically, the conductor 14a and the conductor 14b in the first layer of the adjacent coils 13 are not in contact and are radially spaced apart (FIG. 7). On the other hand, a part of the conductor 14 fitted in the plurality of recesses 130 is not radially spaced apart between adjacent conductors 14 in the first layer of the coil 13 and is in contact with each other.

[0024] A part of the conductor 14 facing the two flat surfaces 131 in two adjacent insulators 12 in the circumferential direction faces each other. Specifically, among two adjacent insulators 12, the conductors 14a to 14c facing the flat surface 131 in one insulator 12 face the conductors 14a to 14c facing the flat surface 131 in the other insulator 12 in the circumferential direction, as shown in FIG. 8.

[0025] With respect to a part of the conductor 14 stacked on a part of the conductor 14 fitted in the plurality of recesses 130, a part of the conductor 14 facing the flat surface 131 is arranged on the inner side in the circumferential direction. Specifically, as shown in FIG. 7, the conductor 14b at the 9th turn of the first layer of the coil 13 moves radially inward, and the conductor 14c at the 10th turn, which is the first winding of the second layer, is wound so as to be arranged more on the inner side in the circumferential direction (for example, on the second direction side in the axial direction) than usual. In other words, the maximum height in the axial direction of the conductor 14c on the second layer side laminated on the flat surface 131 is lower than the maximum height in the axial direction of the conductor 14 on the second layer side laminated on the recess 130 side. Also, the axial separation distance between the central axis of the conductor 14c on the second layer side and the flat surface 131 is shorter than the separation distance between the central axis of the conductor 14 on the second layer side laminated on the recess 130 side and the outer surface 125.

[0026] A part of the conductor 14 facing the flat surface 131 is exposed to the outside with respect to a part of the conductor 14 stacked on a part of the conductor 14 fitted in the plurality of recesses 130. Specifically, among the conductors 14a to 14c facing the flat surface 131, as shown in FIG. 7, the conductor 14a is not shielded from the outside by the conductor 14c or the like constituting the second layer of the coil 13 and can be visually recognized from the outside.

[0027] A part of the conductor 14 facing the flat surface 131 is located at a position farther from the outer surface 125 with respect to a part of the conductor 14 fitted in the plurality of recesses 130. Specifically, since the conductor 14c, which is a part of the conductor facing the flat surface 131, is stacked between the conductor 14a and the conductor 14b, it is arranged at a position farther from the outer surface 125 on the first direction side in the axial direction, and the separation distance at that time is smaller than the distance from a part of the conductor 14 stacked on a part of the conductor 14 fitted in the plurality of recesses 130 to the outer surface 125.

[0028] Of the insulator-side first recess 126 and the insulator-side second recess 127, the position of one of the recesses in the circumferential direction is, as shown in FIG. 9, a position overlapping, when viewed radially, one of the pair of outer surfaces 125 facing each other in the circumferential direction (inner side in the circumferential direction) of the outer surface of the housing portion 121. The position of the other recess in the circumferential direction is a position shifted outward in the circumferential direction when viewed radially with respect to the other of the pair of outer surfaces 125 facing each other in the circumferential direction (outer side in the circumferential direction).

[0029] The coil 13 is formed of a conductor 14 wound around the stator core 11 via the insulator 12. The coil 13 is arranged so as to surround the outer surface 125 of the insulator 12. The coil 13 is formed by winding around the teeth portion 11a of the stator core 11 clockwise or counterclockwise via the housing portion 121 of the insulator 12. The coil 13 is formed of the conductor 14 wound in two layers, but is not limited thereto. The coil 13 may be wound, for example, in two or more even layers, or may be wound in one or more odd layers. As lead wires, the first end portion 141 and the second end portion 142 of the conductor 14 are drawn out in the same direction for the coil 13. Both the first end portion 141 and the second end portion 142 are drawn out from the coil 13 in the first axial direction. The first end portion 141 is drawn out from the outer peripheral portion of the coil 13, and the drawing position thereof is at the outer peripheral portion of the coil 13. The second end portion 142 is drawn out from the inner peripheral portion of the coil 13, and the drawing position thereof is inside the outer peripheral portion of the coil 13.

[0030] The substrate 2 is arranged on the first direction side in the axial direction of the stator 1. The substrate 2 is formed of a resin material having insulation properties such as epoxy, for example. Electronic components (not shown) are arranged on the substrate 2. The electronic components include, for example, an inverter and a control IC. As shown in FIGS. 2, 5, 11A, and 11B, the substrate 2 is recessed inward in the radial direction from the outer peripheral end and has a plurality of substrate-side first recesses 21 and substrate-side second recesses 22 adjacent to each other in the circumferential direction.

[0031] As shown in Fig. 11A, in the assembled state where the substrate 2 is assembled to the stator 1, the first end portion 141, which is one end portion of the conducting wire 14 drawn out from the coil 13, is inserted into the first recess 21 on the substrate side. As shown in Fig. 11A, in the assembled state where the substrate 2 is assembled to the stator 1, the second end portion 142, which is the other end portion of the conducting wire 14 drawn out from the coil 13, is inserted into the second recess 22 on the substrate side. A substrate convex portion 23 is formed in the circumferential direction between the first recess 21 on the substrate side and the second recess 22 on the substrate side. The substrate convex portion 23 is formed to protrude radially outward from the outer periphery of the substrate body 20.

[0032] The first end portion 141 of the conducting wire 14 is inside the first recess 21 on the substrate side in the assembled state where the substrate 2 is assembled to the stator 1, and the other second end portion 142 is inside the second recess 22 on the substrate side. The first end portion 141 and the second end portion 142 are arranged in directions facing each other in the circumferential direction. The first end portion 141 is arranged in a state of inclining inside the first recess 21 on the substrate side toward the second recess 22 on the substrate side in the circumferential direction. The second end portion 142 is arranged in a state of inclining inside the second recess 22 on the substrate side toward the first recess 21 on the substrate side in the circumferential direction. The first end portion 141 and the second end portion 142 sandwich the substrate convex portion 23 between the first recess 21 on the substrate side and the second recess 22 on the substrate side in the circumferential direction. As shown in Fig. 11B, the first end portion 141 and the second end portion 142 are joined to the land 30 of the substrate 2 by, for example, solder H in a state of sandwiching the substrate convex portion 23 between the first recess 21 on the substrate side and the second recess 22 on the substrate side in the circumferential direction.

[0033] The land 30 has conductivity and is connected to the conducting wire 14. As shown in Fig. 11B, the land 30 is physically and electrically connected to the first end portion 141 and the second end portion 142 of the conducting wire 14 drawn out from the coil 13 by soldering. The land 30 is provided on the substrate surface 20a side.

[0034] Next, the operation of winding the conductor 14 around the insulator 12 in this embodiment to form the coil 13 will be described. When the conductor 14 is wound around the insulator 12, the first layer of the coil 13 is wound along a plurality of recesses 130 from the first turn to the eighth turn, and the ninth turn is wound around the flat surface 131. From this state, when the conductor 14c of the second layer of the coil 13 is wound so as to be positioned between the conductors 14a and 14b of the first layer, the ninth turn, which was located at the innermost position in the radial direction of the first layer of the coil 13, moves inward in the radial direction, and the tenth turn, which is the first winding of the second layer, is wound so as to be positioned on the second direction side in the axial direction more than usual. That is, since the position of the conductor 14 arranged on the flat surface 131 is not restricted, it moves by the force when the conductor 14c of the second layer is wound, and guides the conductor 14c of the second layer to the second direction side in the axial direction. At this time, the conductor 14b of the first layer at the ninth turn facing the flat surface 131 of the insulator 12 is separated from the conductors 14 at the first to eighth turns facing the plurality of recesses 130. Therefore, a part of the conductor 14 facing the flat surface 131 in the radial direction is separated from a part of the conductor 14 fitted in the plurality of recesses 130. As a result, as shown in FIG. 8, the space between the conductors 14 wound around the adjacent stator cores 11 can be made wider, and an electrical short circuit due to contact between the conductors 14c of the adjacent coils 13 can be suppressed.

[0035] Next, an operation of routing the first end portion 141 and the second end portion 142 of the conductor 14, which is a lead wire drawn from the coil 13 in the present embodiment, and assembling them into the substrate-side first recess 21 and the substrate-side second recess 22 will be described. When connecting the conductor 14 drawn from the coil 13 to the substrate 2, the first end portion 141 and the second end portion 142 of the conductor 14 are tilted radially outward and released inside the insulator-side first recess 126 and the insulator-side second recess 127 of the insulator 12. Next, after assembling the substrate 2 to the stator 1, the end portions of the conductor 14 released inside the insulator-side first recess 126 and the insulator-side second recess 127 are inserted inside the substrate-side first recess 21 and the substrate-side second recess 22. Thereby, the stator 1 and the substrate 2 can be assembled without the conductor 14 interfering with the insulator 12.

[0036] As described above, the motor according to one aspect of the present invention includes a coil 13 formed of a conductor 14 and an insulator 12 having an outer surface 125 surrounded by the coil 13. The outer surface 125 of the insulator 12 includes a plurality of recesses 130 and a flat surface 131. A part of the conductor 14 facing the flat surface 131 is spaced apart from a part of the conductor 14 fitted in the plurality of recesses 130. For example, when winding the conductor 14 around the insulator 12 to form the coil 13, the conductor 14 is wound along the plurality of recesses 130 from the first turn to the eighth turn, and the ninth turn is wound around the flat surface 131. As a result, the conductor 14 of the ninth turn in the first layer moves radially inward, and the conductor 14 of the tenth turn, which is the first winding of the second layer, is wound so as to be arranged more inward in the circumferential direction (for example, on the second direction side in the axial direction) than before. That is, since the inward movement in the radial direction of the conductor 14 wound around the flat surface 131 is not restricted, the conductor 14 moves by the force when the tenth turn of the conductor 14 is wound, and the tenth turn of the conductor 14 is guided inward in the circumferential direction. As a result, the circumferential size (height) inside the radial direction of the coil 13 becomes smaller (lower). Thereby, contact between the coils 13 formed on the adjacent insulators 12 can be suppressed.

[0037] Further, in the motor according to one aspect of the present invention, in the circumferential direction, a part of the conductor 14 facing the two flat surfaces 131 in two adjacent insulators 12 faces each other. Thereby, contact between the coils 13 formed in the two adjacent insulators 12 can be suppressed.

[0038] Further, in the motor according to one aspect of the present invention, with respect to a part of the conductor 14 stacked on a part of the conductor 14 fitted in the plurality of recesses 130, a part of the conductor 14 stacked on a part of the conductor 14 facing the flat surface 131 is arranged on the inner side in the circumferential direction. Thereby, the conductor 14b at the 9th turn of the first layer of the coil 13 moves radially inward, and the conductor 14c at the 10th turn, which is the first winding of the second layer, is wound so as to be arranged more inward in the circumferential direction (for example, on the second direction side in the axial direction) than usual.

[0039] Further, in the motor according to one aspect of the present invention, a part of the conductor 14 facing the flat surface 131 is exposed to the outside with respect to a part of the conductor 14 stacked on a part of the conductor 14 fitted in the plurality of recesses 130. Thereby, the conductor at the 9th turn of the first layer moves in the radial direction, and the conductor at the 10th turn, which is the first in the second row, is more likely to be arranged more inward in the circumferential direction than usual.

[0040] Further, in the motor according to one aspect of the present invention, a part of the conductor 14 facing the flat surface 131 is located at a position away from the outer surface 125 of the insulator 12 with respect to a part of the conductor 14 fitted in the plurality of recesses 130. Thereby, the conductor 14b at the 9th turn in the first layer of the coil 13 is more likely to move in the radial direction.

[0041] As described above, the motor according to one aspect of the present invention has an annular substrate 2 provided on the stator 1. The substrate 2 is recessed radially inward from the outer peripheral end and has a substrate-side first recess 21 and a substrate-side second recess 22 adjacent to each other in the circumferential direction. Of the two ends of the conducting wire 14, one first end 141 is inside the substrate-side first recess 21, and the other second end 142 is inside the substrate-side second recess 22. The first end 141 and the second end 142 of the conducting wire 14 are arranged in directions facing each other in the circumferential direction. Thereby, the first end 141 and the second end 142 of the conducting wire 14 can sandwich the substrate convex portion 23 between the substrate-side first recess 21 and the substrate-side second recess 22 in the circumferential direction. For example, it is possible to restrict the substrate 2 from moving in the circumferential direction with respect to the stator 1 due to vibration or the like, and reduce the load on the conducting wire 14 routed between the stator 1 and the substrate 2.

[0042] Further, in the motor according to one aspect of the present invention, the first end 141 is arranged in a state of being inclined from the inside of the substrate-side first recess 21 toward the substrate-side second recess 22 in the circumferential direction, and the second end 142 is arranged in a state of being inclined from the inside of the substrate-side second recess 22 toward the substrate-side first recess 21 in the circumferential direction. The first end 141 and the second end 142 sandwich the substrate convex portion 23 between the substrate-side first recess 21 and the substrate-side second recess 22 in the circumferential direction.

[0043] As described above, the motor according to one aspect of the present invention includes a wall portion 122 in which the insulator 12 has two recesses (insulator-side first recess 126, insulator-side second recess 127) facing two lead-out positions of the conducting wire 14 drawn out from the coil 13 in the radial direction. Of the two lead-out positions, one is at the outer peripheral portion of the coil 13, and the other is inside the outer peripheral portion. The substrate 2 is recessed radially inward from the outer peripheral end and has a substrate-side first recess 21 and a substrate-side second recess 22 adjacent to each other in the circumferential direction. The substrate-side first recess 21 faces the insulator-side first recess 126, and the substrate-side second recess 22 faces the insulator-side second recess 127.

[0044] By having the above configuration, when connecting the conducting wire 14 drawn from the coil 13 to the substrate 2, the ends of the conducting wire 14 (the first end 141 and the second end 142) can be released into the recesses (the first insulator-side recess 126 and the second insulator-side recess 127) of the insulator 12 that are on the radially outer side. Then, after assembling the substrate 2 to the stator 1, the ends of the conducting wire 14 released into the recesses of the insulator 12 can be inserted into the recesses on the substrate 2 side (the first substrate-side recess 21 and the second substrate-side recess 22). As a result, the stator 1 and the substrate 2 can be assembled without the conducting wire 14 interfering with the insulator 12, and the productivity of the motor can be improved.

[0045] Also, in the motor according to one aspect of the present invention, among the first insulator-side recess 126 and the second insulator-side recess 127, the position in the circumferential direction of one of the recesses is, as shown in FIG. 9, at a position that overlaps, when viewed radially, one of the pair of outer surfaces 125 facing each other in the circumferential direction (the inner circumferential side) of the outer surface of the housing portion 121. The position in the circumferential direction of the other recess is at a position shifted outward in the circumferential direction when viewed radially with respect to the other of the pair of outer surfaces 125 facing each other in the circumferential direction (the outer circumferential side).

[0046] The insulator-side second recess 127 is formed at a position aligned with one (inner circumferential direction) of the outer surfaces 125 at both ends in the circumferential direction of the accommodating portion 121 of the insulator 12 so that the leading wire 14 at the start of winding of the coil 13 can enter and exit. On the other hand, the insulator-side first recess 126 is formed one wire pitch in the circumferential direction outward from a position aligned with the other (outer circumferential direction) of the outer surfaces 125 at both ends in the circumferential direction of the accommodating portion 121 of the insulator 12 so that the leading wire 14 at the end of winding of the coil 13 (the leading wire 14 of the second layer in this embodiment) can enter and exit. With such a configuration, when connecting the leading wire 14 drawn from the coil 13 to the substrate 2, the ends (the first end 141 and the second end 142) of the leading wire 14 can be released into the recesses (the insulator-side first recess 126 and the insulator-side second recess 127) of the insulator 12 on the radially outer side. Therefore, the stator 1 and the substrate 2 can be assembled without the leading wire 14 interfering with the insulator 12, and the productivity of the motor can be improved.

[0047] (First Modification of the Embodiment) In the above embodiment, the first end 141 of the leading wire 14 is arranged inside the substrate-side first recess 21 in a state inclined in the circumferential direction toward the substrate-side second recess 22, and the second end 142 of the leading wire 14 is arranged inside the substrate-side second recess 22 in a state inclined in the circumferential direction toward the substrate-side first recess 21, but the present invention is not limited thereto. FIG. 12A is an enlarged plan view of the connection portion in the first modification of the embodiment. FIG. 12B is an enlarged side view of the connection portion. The motor according to the second modification of the embodiment is different from the above embodiment in that the first end 141 and the second end 142 of the leading wire 14 each have a bent portion.

[0048] As shown in FIGS. 12A and 12B, the first end portion 141 of the lead wire 14 has a first bent portion 143 in the assembled state where the substrate 2 is assembled to the stator 1. The second end portion 142 of the lead wire 14 has a second bent portion 144 in the assembled state where the substrate 2 is assembled to the stator 1. The first bent portion 143 and the second bent portion 144 are bent in directions facing each other. The first bent portion 143 is formed at a portion that protrudes from the inside of the substrate-side first recess 21 to the outside on the first direction side at the first end portion 141 of the lead wire 14 that is straightly drawn out from the coil 13 toward the first direction side in the axial direction. The first bent portion 143 is bent from the substrate-side first recess 21 toward the substrate-side second recess 22 across the substrate protrusion 23 in the circumferential direction of the substrate 2. The second bent portion 144 is formed at a portion that protrudes from the inside of the substrate-side second recess 22 to the outside on the first direction side at the second end portion 142 of the lead wire 14 that is straightly drawn out from the coil 13 toward the first direction side in the axial direction. The second bent portion 144 is bent from the substrate-side second recess 22 toward the substrate-side first recess 21 across the substrate protrusion 23 in the circumferential direction of the substrate 2.

[0049] In the motor according to one aspect of the present invention, the first end portion 141 of the lead wire 14 drawn out from the coil 13 has a first bent portion 143 bent in the circumferential direction of the substrate 2 at a portion that protrudes from the inside of the substrate-side first recess 21 to the outside. The second end portion 142 of the lead wire 14 has a second bent portion 144 bent in the circumferential direction of the substrate 2 at a portion that protrudes from the inside of the substrate-side second recess 22 to the outside. The first bent portion 143 and the second bent portion 144 are bent in directions facing each other. In this way, by having the first bent portion 143 and the second bent portion 144 where the first end portion 141 and the second end portion 142 of the lead wire 14 are bent inward in the circumferential direction so as to face each other, the substrate protrusion 23 is held in the circumferential direction. Thereby, when the lead wire 14 is drawn out from the coil 13, since it is not necessary to draw out the first end portion 141 and the second end portion 142 while inclining them, the lead wire 14 and the substrate 2 can be more easily connected.

[0050] (Second Modified Example of the Embodiment) In the first modification of the above embodiment, although the first end portion 141 and the second end portion 142 of the conducting wire 14 each have a bent portion, the present invention is not limited thereto. FIG. 13A is an enlarged perspective view of a connection portion in the second modification of the embodiment. FIG. 13B is an enlarged side view of the connection portion. The motor according to the second modification of the embodiment is different from the first modification in that the first end portion 141 and the second end portion 142 of the conducting wire 14 each have a bent portion and a deformed portion.

[0051] As shown in FIGS. 13A and 13B, in the assembled state where the substrate 2 is assembled to the stator 1, the first end portion 141 of the conducting wire 14 has a first deformed portion 145 having a cross-sectional shape different from the cross-sectional shape of the conducting wire 14. The first deformed portion 145 is formed in a rectangular shape when viewed from the axial direction and is located on the side of the second bent portion 144 with respect to the first bent portion 143. The first deformed portion 145 is, for example, a portion crushed in the circumferential direction before the first end portion 141 is bent at the first bent portion 143. The second end portion 142 of the conducting wire 14 has a second deformed portion 146 having a cross-sectional shape different from the cross-sectional shape of the conducting wire 14 in the assembled state where the substrate 2 is assembled to the stator 1. The second deformed portion 146 is formed in a rectangular shape when viewed from the axial direction and is located on the side of the first bent portion 143 with respect to the second bent portion 144. The second deformed portion 146 is, for example, a portion crushed in the circumferential direction before the second end portion 142 is bent at the second bent portion 144.

[0052] In the motor according to one aspect of the present invention, the first end portion 141 of the conducting wire 14 has a first deformed portion 145 that is located on the side of the second bent portion 144 with respect to the first bent portion 143 and has a cross-sectional shape different from the cross-sectional shape of the conducting wire 14. The second end portion 142 of the conducting wire 14 has a second deformed portion 146 that is located on the side of the first bent portion 143 with respect to the second bent portion 144 and has a cross-sectional shape different from the cross-sectional shape of the conducting wire 14. Thereby, by deforming and crushing the first end portion 141 and the second end portion 142 of the conducting wire 14 in the axial direction respectively, the height of the connection portion in the axial direction can be made lower than the outer diameter of the conducting wire 14. As a result, the height of the stator 1 including the substrate 2 in the axial direction can be suppressed, and the motor can be downsized.

[0053] (Third modification of the embodiment) In the above-described embodiment, the substrate 2 has lands 30 for electrically connecting the ends of the conducting wires 14 drawn from the coil 13, and the lands 30 are provided on the surface 20a side of the substrate, but the present invention is not limited thereto. FIG. 14A is an enlarged perspective view of a substrate recess in the third modification of the embodiment. FIG. 14B is an enlarged plan view of the surface side of the substrate recess. FIG. 14C is an enlarged plan view of the back surface side of the substrate recess. FIG. 15 is a schematic diagram showing an example of the soldering state of the conducting wire to the substrate recess in the third modification of the embodiment. The motor according to the third modification of the embodiment is different from the above-described embodiment in that the lands 30 are formed not only on the front and back surfaces of the substrate body 20 but also on the inner peripheral surfaces of the respective recesses.

[0054] The land 30 has a first land portion 31, a second land portion 32, and a third land portion 33. The first land portion 31 is disposed on one end surface in the thickness direction of the substrate 2. Specifically, as shown in FIGS. 14A and 14B, the first land portion 31 is disposed along the first substrate-side recess 21 and the second substrate-side recess 22 on the front surface side of the substrate body 20. The second land portion 32 is disposed on the other end surface in the thickness direction of the substrate 2. Specifically, as shown in FIG. 14C, the second land portion 32 is disposed along the first substrate-side recess 21 and the second substrate-side recess 22 on the back surface side of the substrate body 20. The third land portion 33 is disposed on the inner peripheral surfaces of the first substrate-side recess 21 and the second substrate-side recess 22 as shown in FIGS. 14A to 14C. The first land portion 31, the second land portion 32, and the third land portion 33 communicate with each other. Specifically, in each of the first substrate-side recess 21 and the second substrate-side recess 22, the first land portion 31, the second land portion 32, and the third land portion 33 are continuously formed and electrically conductive. The area of the first land portion 31 in the third modification of the present embodiment is larger than that of the third land portion 33. Also, the area of the second land portion 32 is smaller than that of the first land portion 31.

[0055] The first end portion 141 of the conducting wire 14 is inserted in an inclined state from the inside of the substrate-side first recess 21 toward the substrate-side second recess 22 in the circumferential direction in a state where the substrate 2 is assembled to the stator 1. The second end portion 142 of the conducting wire 14 is inserted in an inclined state from the inside of the substrate-side second recess 22 toward the substrate-side first recess 21 in the circumferential direction in a state where the substrate 2 is assembled to the stator 1. As shown in FIG. 15, the outer peripheral surfaces of the first end portion 141 and the second end portion 142 of the conducting wire 14 are in contact with and supported by the circumferential ends on the substrate surface 20a side and the circumferential ends on the substrate back surface 20b side of the respective recesses (substrate-side first recess 21, substrate-side second recess 22). Therefore, it is possible to prevent the end portion of the conducting wire 14, which is a lead wire, from moving relative to the substrate 2.

[0056] As described above, in the motor according to one aspect of the present invention, the substrate-side first recess 21 and the substrate-side second recess 22 are recessed radially inward from the outer peripheral end and open radially outward. Thus, unlike the through hole provided in the substrate 2, the end portion of the conducting wire 14 can be wired into the substrate-side first recess 21 and the substrate-side second recess 22 from the radial direction instead of the axial direction (the direction perpendicular to the substrate surface). Therefore, the assemblability of the conducting wire 14 to the substrate 2 can be facilitated, and the productivity can be improved. Further, the third land portion 33 is disposed on the inner circumferential surfaces of the respective substrate-side first recess 21 and substrate-side second recess 22, and the first land portion 31, the second land portion 32, and the third land portion 33 communicate with each other. Thus, when soldering the land 30 and the conducting wire 14, not only the joining of the first land portion 31 and the conducting wire 14 but also the joining of the second land portion 32 and the third land portion 33 and the conducting wire 14 becomes possible. Thereby, the strength of the joint portion between the land 30 and the conducting wire 14 can be improved, and since the conducting wire 14, which is a lead wire from the coil 13, is widely connected in the thickness direction of the substrate 2, for example, relative movement between the substrate 2 and the conducting wire 14 due to vibration of the motor or the like can be suppressed, and disconnection of the conducting wire 14 or the like can be prevented.

[0057] Note that in the third modification of the above embodiment, the first end portion 141 is disposed in an inclined state toward the second substrate-side recess 22 in the circumferential direction inside the first substrate-side recess 21, and the second end portion 142 is disposed in an inclined state toward the first substrate-side recess 21 in the circumferential direction inside the second substrate-side recess 22. However, the present invention is not limited to this. The third modification of the embodiment may be applied to the first and second modifications of the embodiment.

[0058] Further, in the third modification of the above embodiment, by soldering to the first land portion 31 from the substrate surface 20a side, the end portions of the conductive wire 14 are soldered and fixed to the substrate 2 at three locations using the solder that flows into the third land portion 33 and the second land portion 32 in this order. However, the present invention is not limited to this. For example, by soldering to the first land portion 31 from the substrate surface 20a side, the end portions of the conductive wire 14 may be soldered and fixed to the substrate 2 at two locations using the solder that flows into the third land portion 33. Further, by soldering to the first land portion 31 from the substrate surface 20a side and soldering to the second land portion 32 from the back surface 20b side of the substrate, the end portions of the conductive wire 14 may be soldered and fixed to the substrate 2 at three locations using the solder that flows into the third land portion 33.

[0059] (Fourth Modification of the Embodiment) In the above embodiment, the wall portion 122 of the insulator 12 has two recesses (the first insulator-side recess 126 and the second insulator-side recess 127) that face two lead-out positions of the conductive wire 14 drawn from the coil 13 in the radial direction. However, the present invention is not limited to this. FIG. 16 is an external perspective view of the split core in the fourth modification of the embodiment. FIG. 17A is an enlarged side view of the connection portion between the split core and the substrate in the fourth modification of the embodiment. FIG. 17B is an enlarged plan view of the connection portion in the fourth modification of the embodiment. FIG. 18 is a schematic diagram showing the positional change of the conductive wire when the substrate is assembled to the split core in the fourth modification of the embodiment. The motor according to the fourth modification of the embodiment is different from the above embodiment in that the wall portion 122A of the insulator 12A has an inclined surface 152.

[0060] As shown in FIG. 16, the insulator 12 has a housing portion 121 and a wall portion 122A formed at the radially outer end of the housing portion 121. The wall portion 122A is located on the outer peripheral side of the substrate 2 in the assembled state where the substrate 2 is assembled to the stator 1. The wall portion 122A is formed in a substantially rectangular shape when viewed from the radial direction and protrudes from the yoke portion 11b in the axial direction. As shown in FIG. 16, the wall portion 122A has a recess 151 and an inclined surface 152. The recess 151 is formed to be recessed from the end on the first direction side in the axial direction of the wall portion 122A toward the second direction side. The recess 151 is a portion where the substrate protrusion 23 fits in the assembled state where the substrate 2 is assembled to the stator 1. When viewed from the circumferential direction, as shown in FIG. 18, the inclined surface 152 is inclined so that the radial thickness decreases from the middle in the axial direction of the wall portion 122A toward the end on the first direction side. Further, in the assembled state where the substrate 2 is assembled to the stator 1, the inclined surface 152 is inclined from the inner side to the outer side in the radial direction toward the lead-out direction of the lead wire 14.

[0061] As described above, in the motor according to one aspect of the present invention, the insulator 12A has a wall portion 122A located on the outer peripheral side of the substrate 2 in the assembled state where the substrate 2 is assembled to the stator 1. The wall portion 122A has an inclined surface 152 that is inclined from the inner side to the outer side in the radial direction toward the lead-out direction of the lead wire 14 in the assembled state where the substrate 2 is assembled to the stator 1. Thereby, when connecting the lead wire 14 drawn from the coil 13 to the substrate 2, the ends (the first end 141 and the second end 142) of the lead wire 14 can be released to the inclined surface 152 side of the insulator 12A on the radially outer side. Then, after the substrate 2 is assembled to the stator 1, the ends of the lead wire 14 released to the inclined surface 152 side of the insulator 12A can be inserted into the recesses (the first recess 21 on the substrate side and the second recess 22 on the substrate side) on the substrate 2 side. As a result, the stator 1 and the substrate 2 can be assembled without the lead wire 14 interfering with the insulator 12A, and the productivity of the motor can be improved.

[0062] Further, in the above-described embodiments and modified examples, the plurality of concave portions 130 are formed to be recessed from the outer surface 125 toward the second direction side in the axial direction. However, the present invention is not limited to this, and they may be formed to protrude from the outer surface 125 toward the first direction side in the axial direction. Also, among the four outer surfaces 125, one is composed of the plurality of concave portions 130 and the flat surface 131, but the present invention is not limited to this. For example, all of the four outer surfaces 125 may include the plurality of concave portions 130 and the flat surface 131.

[0063] Further, in the above-described embodiments and modified examples, it has been described that, among the four outer surfaces 125 of the insulator 12, three are composed of only flat surfaces, and one is composed of the plurality of concave portions 130 and the flat surface 131. However, the present invention is not limited to this. For example, the outer surface 125 composed of the plurality of concave portions 130 and the flat surface 131 may be applied to all of the four outer surfaces 125 that constitute the outer peripheral surface of the housing portion 121, or may be applied to a part thereof.

[0064] As described above, the embodiments and modified examples of the present invention have been explained. However, the present invention is not limited to the above-described embodiments and modified examples, and various changes can be made without departing from the spirit thereof. Also, the present invention is not limited by the above-described embodiments and modified examples. Those configured by appropriately combining the above-described respective components are also included in the present invention. Further, additional effects and modified examples can be easily derived by those skilled in the art. Therefore, a broader aspect of the present invention is not limited to the above-described embodiments, and various changes are possible.

Explanation of Reference Numerals

[0065] 1 Stator, 2 Substrate, 10 Split Core, 11 Stator Core, 11a Tooth Portion, 11b Yoke Portion, 12 Insulator, 13 Coil, 14 Conductive Wire, 20 Substrate Body, 21 First Concave Portion on Substrate Side, 22 Second Concave Portion on Substrate Side, 30 Land, 31 First Land Portion, 32 Second Land Portion, 33 Third Land Portion, 121 Accommodating Portion, 122 Wall Portion, 125 Outer Surface, 126 First Concave Portion on Insulator Side (Third Concave Portion), 127 Second Concave Portion on Insulator Side (Fourth Concave Portion), 128 Convex Portion on Insulator Side, 130 Concave Portion, 131 Flat Surface, 132 Convex Portion, 141 First End Portion, 142 Second End Portion, 143 First Bending Portion, 144 Second Bending Portion, 145 First Deformation Portion, 146 Second Deformation Portion

Claims

1. A stator having a magnetic body and a conducting wire wound around the magnetic body, An annular substrate provided on the stator, and comprising: The substrate has: A first recess that is recessed radially inward from the outer peripheral end and in which the first end portion of the conducting wire is disposed inside; A second recess that is recessed radially inward from the outer peripheral end and in which the second end portion of the conducting wire is disposed inside; A land having conductivity and connected to the conducting wire, and having: The land has: A first land portion disposed along the first recess and the second recess on the surface side of the substrate; A second land portion disposed along the first recess and the second recess on the back side of the substrate; And a third land portion disposed on the inner peripheral surfaces of the first recess and the second recess, The first land portion includes a part electrically connected to the first end portion of the conducting wire and another part electrically connected to the second end portion of the conducting wire; In the circumferential direction, one of a part of the adjacent first land portion and the other part of the first land portion extends toward the other, and the other extends toward the one; A part of the first land portion, a part of the second land portion, and a part of the third land portion communicate with each other; The other part of the first land portion, the other part of the second land portion, and the other part of the third land portion communicate with each other; The first land portion has: A larger area than the second land portion and the third land portion, A motor.

2. The first end portion of the conducting wire disposed inside the first recess is electrically connected by soldering to a part of the first land portion, a part of the second land portion, and a part of the third land portion. The second end portion of the conducting wire disposed inside the second recess is electrically connected by soldering to the other portion of the first land portion, the other portion of the second land portion, and the other portion of the third land portion. The motor according to claim 1.

3. The stator includes an insulator having a first recess and a second recess. The conducting wire is wound around the magnetic body via the insulator. In the radial direction, the end of the first recess of the substrate faces the first recess of the insulator. In the radial direction, the end of the second recess of the substrate faces the second recess of the insulator. The motor according to claim 1 or 2.

4. The substrate has a convex portion between the first recess and the second recess. The insulator has a convex portion between the first recess and the second recess. In the axial direction, the convex portion of the substrate faces the convex portion of the insulator. The motor according to claim 3.

5. The land is formed on the convex portion of the substrate. The motor according to claim 4.

6. A plurality of magnetic bodies including the magnetic body, A plurality of coils formed by a plurality of conducting wires, including the coil formed by the conducting wire, Comprising, Each of the plurality of magnetic bodies is wound with each of the plurality of coils. The motor according to any one of claims 1 to 5.

7. The stator is integrated by insert molding. The motor according to any one of claims 1 to 6.

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