Coil for motor, stator, and motor

Abstract

A motor coil (2) is provided with: a first lead wire (10) wound in the winding axis direction; and second conductive lines (30, 40) connected to the first conductive line (10). The first conductive wire (10) is provided with: side surfaces (15, 16, 17, 18) extending in the circumferential direction around which the first conductive wire (10) is wound; and holes (13, 14) formed in the side surface (15). A part of the second lead wire (30, 40) is disposed in the hole portion (13, 14).

Description

Technical Field

[0001] The present invention relates to a coil for a motor, a stator, and a motor. Background Art

[0002] A technique for manufacturing a coil for a motor by cutting a cylindrical conductor such as copper is known. At this time, the terminals of the coil are formed, for example, by bending the cut ends. For example, in a technique for manufacturing a coil by cutting a conductive cylindrical body into a spiral shape, a technique is known in which protrusions and rods are cut out at both ends of the cylindrical body to form terminals, or the terminals are further bent to form bent terminals. Further, in a technique for forming a flat wire by cutting a cylindrical conductor into a spiral shape, it is known that a circuit terminal portion is formed by bending the end portion of the flat wire formed by the cut of the cylindrical conductor. Prior Art Documents Patent Documents

[0003] Patent Document 1: Japanese Patent Laid-Open No. 11-97270 Patent Document 2: Japanese Patent Laid-Open No. 2004-274965 Summary of the Invention Problems to be Solved by the Invention

[0004] When using a motor under a large current, it is required to increase the cross-sectional area of the coil for the motor. At this time, it is sometimes difficult to bend the cut ends.

[0005] In one aspect, an object is to provide a coil for a motor, a stator, and a motor in which terminals can be easily formed in a coil having a large cross-sectional area. Means for Solving the Problems

[0006] In one aspect, a coil for a motor includes: a first wire wound in a winding axis direction; and a second wire connected to the first wire. The first wire includes: a side surface extending in a circumferential direction around which the first wire is wound; and a hole portion formed in the side surface. A part of the second wire is disposed within the hole portion.

[0007] According to one aspect, terminals can be easily formed in a coil having a large cross-sectional area. Brief Description of the Drawings

[0008] Figure 1 It is a diagram showing an example of a motor in the first embodiment. Figure 2 It is an exploded perspective view showing an example of the installation of the coil for a motor to the stator in the first embodiment. Figure 3 It is a perspective view showing an example of the coil for a motor installed in the stator in the first embodiment. Figure 4 This is a perspective view showing an example of a motor coil in the first embodiment. Figure 5 This is an exploded perspective view showing an example of a motor coil in the first embodiment. Figure 6 This is a perspective view showing an example of a second wire in the first embodiment. Figure 7 This is a perspective view showing an example of a motor in the second embodiment. Figure 8 This is an exploded perspective view showing an example of the installation of a coil on a stator in the second embodiment. Figure 9 This is a perspective view showing an example of a coil installed on a stator in the second embodiment. Figure 10 This is a perspective view showing an example of a coil in the second embodiment. Figure 11 This is a perspective view showing an example of a conductive member in the second embodiment. Figure 12 This is a top view showing an example of a conductive member before processing in the second embodiment. Figure 13 This is a perspective view showing an example of a coil with terminals installed in the second embodiment. Figure 14 This is an exploded perspective view showing an example of the process of installing terminals on a coil in the second embodiment. Figure 15 This is a perspective view showing an example of a coil in the first modification. Figure 16 This is a perspective view showing an example of a conductive member in the first modification. Figure 17 This is a top view showing an example of a coil installed on a stator in the first modification. Figure 18 This is a perspective view showing an example of a coil in the third embodiment. Figure 19 This is a perspective view showing an example of a conductive member in the third embodiment. Figure 20 This is an enlarged perspective view showing an example of an engaging mechanism in the third embodiment. Figure 21 This is a top view showing an example of a conductive member before processing in the third embodiment. Figure 22 This is a top view showing an example of the manufacturing process of a conductive member in the third embodiment. Figure 23 It is an exploded perspective view showing an example of the process of mounting a terminal to a coil in the third embodiment. Figure 24 It is a top view showing an example of a conductive member with a terminal before processing in the second modification. Figure 25 It is a top view showing another example of a conductive member with a terminal before processing in the second modification. Figure 26 It is a perspective view showing an example of a coil with a terminal in the second modification. Figure 27 It is a perspective view showing an example of a conductive member in the third modification. Figure 28 It is an enlarged perspective view showing an example of an engaging mechanism in the third modification. Figure 29 It is a perspective view showing an example of a coil in the third modification. Figure 30 It is a perspective view showing an example of a conductive member in the fourth modification. Figure 31 It is a perspective view showing an example of a conductive member in the fifth modification. Figure 32 It is a perspective view showing an example of a segmented core mounted on a stator core in the fourth embodiment. Figure 33 It is a perspective view showing an example of a segmented core in the fourth embodiment. Figure 34 It is a perspective view showing an example of a segmented core in the fourth embodiment. Figure 35 It is an exploded perspective view showing an example of a segmented core in the fourth embodiment. Figure 36 It is an exploded perspective view showing an example of a segmented core in the fourth embodiment. Figure 37 It is a perspective view showing an example of a segmented core in the sixth modification. Figure 38 It is an exploded perspective view showing an example of a segmented core in the sixth modification. Figure 39 It is an exploded perspective view showing an example of a segmented core in the sixth modification. Figure 40 It is a perspective view showing an example of the process of mounting a coil to a housing in the seventh modification. Figure 41 It is a perspective view showing an example of a segmented core in the seventh modification. Figure 42 It is a cross-sectional perspective view showing an example of the divided core in the seventh modification. Figure 43 It is a perspective view showing an example of the process of mounting the coil on the housing in the eighth modification. Figure 44 It is a perspective view showing an example of the coil accommodated in the housing in the eighth modification. Figure 45 It is an enlarged perspective view showing an example of the engaging portion of the coil accommodated in the housing in the eighth modification. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0009] Hereinafter, each embodiment of the coil for a motor, the stator, and the motor disclosed in the present application will be described in detail with reference to the drawings. It should be noted that the dimensional relationships between the elements in the drawings, the ratios of the elements, etc. are sometimes different from the actual ones. Sometimes there are also parts with different dimensional relationships and ratios between the drawings. In each drawing, for ease of explanation, a coordinate system based on the circumferential direction, the radial direction, and the axial direction of the rotor described later may be illustrated.

[0010] [First Embodiment] First, Figure 1 will be used to describe the motor in the first embodiment. Figure 1 is a view showing an example of the motor in the first embodiment. As Figure 1 shown, the motor 1 in the first embodiment is a so-called inner rotor type motor in which the stator 80 is disposed at a position radially outside the rotor 91.

[0011] As Figure 1 shown, the motor 1 includes a stator 80, a rotor 91, and a shaft 99. The stator 80 includes a coil 2, an insulator 83, and a stator core 81. The stator core 81 is, for example, an annular member formed by laminating a plurality of magnetic bodies such as stainless steel and magnetic steel sheets in the axial direction.

[0012] As Figure 2 shown, the stator core 81 includes teeth 82 extending radially inward. Figure 2 is an exploded perspective view showing an example of mounting the motor coil on the stator. As Figure 2 shown, the coil 2 is attached to the teeth 82 with the insulator 83 interposed therebetween. It should be noted that the coil 2 is an example of the motor coil.

[0013] The insulator 83 is formed of an insulator such as resin. As Figure 3 shown, the insulator 83 is inserted through the teeth 82 in a state of being surrounded by the coil 2, for example. Figure 3This is a perspective view showing an example of a motor coil installed on a stator. In this case, the stator core 81 is surrounded by the coil 2 with an insulating member 83 interposed therebetween.

[0014] The rotor 91 is arranged to be rotatable about the axis 99 as the rotation axis in the motor 1. The rotor 91 includes the axis 99, a rotor yoke (yoke), and magnets (not shown).

[0015] The axis 99 is a rotation axis and is formed in a cylindrical shape at the innermost side in the radial direction of the rotor 91. The rotor yoke is formed in a cylindrical shape from a magnetic material such as iron, for example. Further, the inner circumferential surface of the rotor 91 is arranged to be in contact with the outer circumferential surface of the axis 99.

[0016] As Figure 4 shown, the coil 2 includes: a first wire 10 wound in the winding axis direction; and a second wire 30 connected to the first wire 10. Figure 4 This is a perspective view showing an example of a motor coil in the first embodiment. As Figure 4 shown, the first wire 10 of the coil 2 is wound with the radial direction of the rotor 91 as the winding axis direction. Further, the coil 2 in the first embodiment further includes a second wire 40 connected to the first wire 10.

[0017] The first wire 10 of the coil 2 is formed, for example, by cutting a conductor such as copper. For example, a spiral cut is made in a cylindrical copper, thereby forming Figure 4 the first wire 10 as shown. It should be noted that after cutting the cut, an insulating coating is applied to the first wire 10 by electrodeposition coating or the like. Thereby, the portions adjacent to each other in the winding axis direction of the first wire 10 are insulated from each other.

[0018] As Figure 5 shown, the first wire 10 includes side surfaces 15, 16, 17, 18 extending in the circumferential direction in which the first wire 10 is wound. Figure 5 This is an exploded perspective view showing an example of a motor coil in the first embodiment. As Figure 5 shown, the side surface 15 is located on the positive side in the axial direction, and the side surface 17 is located on the negative side in the axial direction. Further, the side surface 16 is located on one side in the circumferential direction, and the side surface 18 is located on the other side in the circumferential direction.

[0019] The cross-sectional area of the first wire 10 in the first embodiment is, for example, 4 square mm or more. As Figure 5 shown, for example, when the thickness W1 in the winding axis direction of the first wire 10 is 1 mm, the thickness W2 in the axial direction is 4 mm to 6 mm.

[0020] In the first embodiment, the first wire 10 includes one end portion 11 and the other end portion 12 in the winding axis direction. As Figure 5As shown, one end 11 and the other end 12 are both located on the side surface 15 on the positive direction side in the axial direction.

[0021] In addition, the first wire 10 has hole portions 13 and 14 formed in the side surface 15. As Figure 5 shown, the hole portion 13 is formed near one end 11, and the hole portion 14 is formed near the other end 12. In the first embodiment, the hole portions 13 and 14 have a substantially circular cross-section with a diameter of about 0.8 mm, for example.

[0022] In the first embodiment, the second wire 30 is disposed in the hole portion 13 of the first wire 10, and the second wire 40 is disposed in the hole portion 14 of the first wire 10. In this case, as Figure 5 shown, the second wire 30 is disposed near one end in the winding axis direction of the coil 2, and the second wire 40 is disposed near the other end in the winding axis direction of the coil 2.

[0023] Figure 6 is a perspective view showing an example of the second wire in the first embodiment. It should be noted that Figure 6 the second wire 40 is shown, but since the second wire 30 also has the same configuration, the detailed description of the second wire 30 will sometimes be omitted hereinafter.

[0024] As Figure 6 shown, the second wire 40 has one end 41 and the other end 42 on the side of the first wire 10. It should be noted that one end 41 and one end 31 described below are examples of a part of the second wire.

[0025] One end 31 of the second wire 30 is inserted into the hole portion 13 of the first wire 10 from the positive direction side in the axial direction, and one end 41 of the second wire 40 is inserted into the hole portion 14 of the first wire 10 from the positive direction side in the axial direction. In this case, one end 31 is located in the hole portion 13, and one end 41 is located in the hole portion 14. That is, a part of the second wire 30 and the second wire 40 is disposed in the hole portions 13 and 14. In this case, one end 31 and one end 41 have a cross-section substantially the same as or slightly smaller than the diameter W3 of the cross-section of the hole portions 13 and 14. For example, the diameter W3 of the cross-section of one end 31 and one end 41 is about 0.7 mm.

[0026] One end 31 and one end 41 of the second wires 30 and 40 are electrically connected to the first wire 10. That is, at least a part of one end 31 and one end 41 is not insulated and is fixed to the hole portions 13 and 14 of the first wire 10 by welding. In this case, as Figure 1 shown, the second wire 30 and the second wire 40 extend in the direction of the rotation axis of the rotor 91.

[0027] The thickness W4 of the other end 42 of the second wire 40 is, for example, greater than the diameter W3 of one end 41. In addition, at least a part of the other end 42 of the second wire 40 is not insulated. In this case, the other end 42 becomes a terminal for connecting to an external device. Thus, there is no need to process the end of the first wire 10 as a connection terminal, so the workability when forming the connection terminal can be improved.

[0028] In addition, in order to allow a large current to flow through the coil 2, it is preferable to thicken the second wire 30 and the second wire 40 that serve as connection terminals. According to the first embodiment, the other ends 32 and 42 of the second wire 30 and the second wire 40 can be made thicker than the thickness W1 of the first wire 10. For example, when the thickness W1 in the winding axis direction of the first wire 10 is 1 mm, the thickness W4 of the other ends 32 and 42 of the second wire 30 and the second wire 40 can be set to 2 mm or more.

[0029] As described above, the motor coil 2 in the first embodiment includes: a first wire 10 wound in the winding axis direction; and second wires 30 and 40 connected to the first wire 10. The first wire 10 includes: side surfaces 15, 16, 17, and 18 extending in the circumferential direction around which the first wire 10 is wound; and hole portions 13 and 14 formed in the side surface 15. One end 31 of the second wire 30 is disposed within the hole portion 13. In addition, the stator 80 in the first embodiment includes the motor coil 2, an insulator 83, and a stator core 81 surrounded by the motor coil 2 with the insulator 83 interposed therebetween. In addition, the motor 1 in the first embodiment includes a rotor 91, and the second wires 30 and 40 extend in the direction of the rotation axis of the rotor 91. According to this configuration, terminals can be easily formed in a coil having a large cross-sectional area.

[0030] [Modification Example] The configuration in the first embodiment has been described above, but the embodiment is not limited thereto. For example, a coil having two second wires 30 and 40 has been described, but it is not limited thereto. The motor coil may have only one second wire, or may have three or more second wires.

[0031] The second wires 30 and 40 may be oriented in other directions such as the radial direction or the circumferential direction of the rotor 91 instead of the axial direction of the rotor 91. In addition, the second wires 30 and 40 may have bent portions or curved shapes. In addition, the second wire 30 and the second wire 40 may have different shapes.

[0032] In addition, the second wire 30 and the second wire 40 can also be arranged on the first wire 10 by other methods such as welding. The shapes of the holes 13 and 14 for arranging the second wire 30 and the second wire 40 are not limited to having Figure 5 the shape of a substantially circular cross-section shown.

[0033] [Second Embodiment] Next, Figure 7 is used to describe the motor in the second embodiment. Figure 7 is a perspective view showing an example of the motor in the second embodiment. As Figure 7 shown, the motor A1 in the second embodiment is a so-called inner rotor type motor in which the stator A80 is arranged at a position radially outside the rotor A90.

[0034] As Figure 7 shown, the motor A1 includes a coil A10, a stator A80, and a rotor A90. The stator A80 has an insulator A83 and a stator core A81 surrounded by the coil A10 with the insulator A83 interposed therebetween. The stator core A81 is an annular member formed by laminating a plurality of magnetic bodies such as stainless steel and magnetic steel sheets in the axial direction. It should be noted that the coil A10 is an example of a motor coil.

[0035] As Figure 8 shown, the stator core A81 has teeth A82 extending radially inward. Figure 8 is an exploded perspective view showing an example of the installation of the coil in the second embodiment on the stator. As Figure 8 shown, the coil A10 is attached to the teeth A82 with the insulator A83 interposed therebetween.

[0036] The insulator A83 is formed of an insulating material such as resin. As Figure 9 shown, the insulator A83 is inserted through the teeth A82 in a state of being surrounded by the coil A10, for example. Figure 9 is a perspective view showing an example of the coil installed on the stator. In this case, the stator core A81 is surrounded by the coil A10 with the insulator A83 interposed therebetween.

[0037] The rotor A90 is arranged to be rotatable about the shaft A99 that serves as the rotation axis in the motor A1. The rotor A90 includes a shaft A99, a rotor yoke A91 (yoke), and an annular magnet A92 surrounding the outer peripheral portion of the rotor yoke.

[0038] The shaft A99 is a rotating shaft and is formed in a cylindrical shape at the innermost side in the radial direction of the rotor A90. The rotor yoke A91 is formed in a cylindrical shape from a magnetic material such as iron, for example. Further, the inner circumferential surface of the rotor yoke A91 is arranged to contact the outer circumferential surface of the shaft A99. It should be noted that the stator A80, the rotor A90, and the shaft A99 may also be the same components as the stator 80, the rotor 91, and the shaft 99 in the first embodiment.

[0039] In the second embodiment, Figure 10 the coil A10 shown is formed by laminating a plurality of Figure 11 conductive members 100 shown in the radial direction of the rotor A90. Figure 10 is a perspective view showing an example of the coil in the second embodiment. Figure 11 is a perspective view showing an example of the conductive member in the second embodiment. As Figure 10 shown, the coil A10 in the second embodiment includes a plurality of conductive members 100 stacked in the radial direction of the rotor A90. Further, in the radial direction of the rotor A90, the plurality of conductive members 100 are engaged with each other. In this case, the winding axis direction of the coil A10 becomes the radial direction of the rotor A90. It should be noted that the radial direction of the rotor A90 is an example of a specified direction. Further, hereinafter, when the plurality of conductive members 100 are separately distinguished, they may be expressed as conductive members 1a0 to 1j0.

[0040] As Figure 11 shown, the conductive member 100 includes a first plane 101, an inclined surface 104, a second plane 105, and a third plane 106. In the second embodiment, the thicknesses of the first plane 101, the inclined surface 104, the second plane 105, and the third plane 106 in the radial direction are substantially the same.

[0041] The first plane 101 includes a portion extending in the circumferential direction on the negative direction side in the axial direction and portions extending from both ends in the circumferential direction of this portion to the positive direction side in the axial direction. The second plane 105 extends from the end on the positive direction side in the axial direction on one side in the circumferential direction of the first plane 101 to the other side in the circumferential direction. The inclined surface 104 extends from a portion on the positive direction side in the axial direction on the other side in the circumferential direction of the first plane 101 to the positive direction side in the axial direction. Further, the inclined surface 104 is inclined toward the positive direction side in the radial direction. The third plane 106 extends from the end on the positive direction side in the axial direction of the inclined surface 104 to the positive direction side in the axial direction.

[0042] Further, as Figure 11 shown, the plurality of conductive members 100 each include an engaged portion 107 and an engaging portion 108. The engaged portion 107 and the engaging portion 108 constitute an engaging mechanism 109. As Figure 11As shown, the engaged portion 107 is a recess formed by cutting away from the end on the other side in the circumferential direction of the second plane 105 toward the one side in the circumferential direction. Further, the engaging portion 108 is a convex portion protruding from the portion on the positive direction side in the axial direction of the third plane 106 toward the one side in the circumferential direction. That is, in the second embodiment, the engaging portion 108 is a convex portion protruding in the circumferential direction, and the engaged portion 107 is a recess recessed in the circumferential direction.

[0043] In the second embodiment, as Figure 11 shown, the engaging portion 108 is located on the outer side in the radial direction with respect to the engaged portion 107, the second plane 105, and the first plane 101. It should be noted that the inner side in the radial direction is an example of one side in the specified direction, and the outer side in the radial direction is an example of the other side in the specified direction.

[0044] In this case, Figure 10 the engaged portion 107 of the first conductive member 1b0 among the plurality of conductive members 100 shown is engaged with the engaging portion 108 of the second conductive member 1a0 located on the inner side in the radial direction. Further, the engaging portion 108 of the first conductive member 1b0 is engaged with the engaged portion 107 of the third conductive member 1c0 located on the outer side in the radial direction. Further, as Figure 10 shown, the second conductive member 1a0, the first conductive member 1b0, and the third conductive member 1c0 constitute a spiral conductive member.

[0045] Among the plurality of conductive members 100, when engaging in a spiral shape, the engaged portion 107 and the engaging portion 108 of two adjacent conductive members 100 in the winding axis direction are electrically connected to each other. On the other hand, two adjacent conductive members 100 in the winding axis direction are engaged with a gap therebetween so as to prevent a short circuit at portions other than the engaged portion 107 and the engaging portion 108. Further, for example, an insulating coating film (coating film) is applied to the plurality of conductive members 100 engaged in a spiral shape by electrodeposition coating or the like, and the insulating coating film fills the gap between two adjacent conductive members 100. Thus, between the conductive members 100 engaged with each other in the winding axis direction, while maintaining the electrical connection between the engaged portion 107 and the engaging portion 108, a short circuit at other portions is suppressed.

[0046] The conductive member 100 in the second embodiment is formed, for example, by processing the Figure 12 plate material 199 shown. Figure 12 is a top view showing an example of the conductive member before processing in the second embodiment. The plate material 199 is, for example, a ring-shaped plate member made of a conductive material such as copper that surrounds the Figure 12 cavity 10r shown.

[0047] In the second embodiment, the cut plate 199 is bent into a valley fold at the folding line 10u and into a mountain fold at the folding line 10t, thereby forming the first plane 101 and the inclined plane 104 that is inclined toward the positive direction in the radial direction. Further, by cutting the bent plate 199 along the cutting line 10s, the second plane 105 having the engaged portion 107 and the third plane 106 having the engaging portion 108 are formed. In this case, the cavity 10r becomes a through hole that is inserted into the tooth A82 shown in Figure 8 in the coil A10 in which the conductive members 100 are stacked.

[0048] As described above, the motor A1 in the second embodiment includes: the motor coil A10; the stator A80 having the insulator A83 and the stator core A81, and the stator core A81 is surrounded by the motor coil A10 with the insulator A83 interposed therebetween; and the rotor A90. Further, the motor coil A10 in the second embodiment includes a plurality of conductive members 100 stacked in a predetermined direction, and in the predetermined direction, the plurality of conductive members 100 are engaged with each other. According to this configuration, the workability in forming the motor coil can be improved.

[0049] It should be noted that, as Figure 13 shown, the terminals A31 and A32 may also be installed on the coil A10 in the second embodiment. Figure 13 is a perspective view showing an example of the coil with terminals installed in the second embodiment. Figure 14 is an exploded perspective view showing an example of the process of installing the terminals on the coil in the second embodiment. The terminals A31 and A32 are, for example, substantially cylindrical conductors formed of a conductive material such as copper.

[0050] In the second embodiment, as Figure 13 shown, the terminals A31 and A32 extend toward the positive direction in the axial direction. The terminals A31 and A32 are installed on the conductive members 100 by welding or the like, for example. In the second embodiment, the terminal A31 is electrically connected to the position shown by the dotted line in the second plane 105 of the conductive member 100 on the negative side in the radial direction, and the terminal A32 is electrically connected to the position shown by the dotted line in the third plane 106 of the conductive member 100 on the positive side in the radial direction. According to this configuration, the coil 10a with terminals can be easily formed.

[0051] Further, the directions in which the terminals A31 and A32 extend may be other directions such as the radial direction and the circumferential direction, and the connected positions are not limited to Figure 13 and Figure 14The position shown. In addition, it may also be configured as follows: Only one of the conductive members 1a0 at the end on the negative direction side in the radial direction of the coil A10 and the conductive member 1j0 at the end on the positive direction side in the radial direction is connected to the terminal A31 or the terminal A32.

[0052] [First Variant Example] In the second embodiment, the coil A10 is formed of a plurality of identical conductive members 100, but is not limited thereto. As Figure 15 shown, the coil may also be formed by spirally engaging a plurality of conductive members having different sizes and shapes. Figure 15 is a perspective view showing an example of the coil in the first variant example. It should be noted that in the following embodiments and variant examples, the same reference numerals are assigned to the parts that are the same as those shown in the previously described drawings, and repeated descriptions are omitted.

[0053] As Figure 15 shown, the coil A20 in the first variant example includes a plurality of conductive members 1a0 to 1g0 and other plurality of conductive members 2h0 to 2j0 having different circumferential sizes from the conductive member 100. It should be noted that hereinafter, without distinguishing the expression of the plurality of conductive members 2h0 to 2j0, they are sometimes only described as the conductive member 200.

[0054] Figure 16 is a perspective view showing an example of the conductive member in the first variant example. The conductive member 200 is Figure 11 shown, and similarly to the conductive member 100, includes a first plane 201, an inclined surface 204, a second plane 205, and a third plane 206. The first plane 201, the inclined surface 204, the second plane 205, and the third plane 206 extend in substantially the same directions as the first plane 101, the inclined surface 104, the second plane 105, and the third plane 106 of the conductive member 100, respectively. In addition, the inclined surface 204 is formed by bending at the fold lines 20t and 20u.

[0055] As Figure 16 shown, the conductive member 200 in the first variant example includes one or more portions (overhanging portions 20k and 20m) that protrude in the circumferential direction compared to the conductive member 100.

[0056] In the first modification example, the engaging mechanism 109 of the conductive member 200 having the overhanging portion 20k and the overhanging portion 20m has the same shape as the engaging mechanism 109 of the conductive member 100. In addition, the shape and size of the cavity 10r of the conductive member 200 are also substantially the same as the shape and size of the cavity 10r of the conductive member 100. Thereby, the conductive member 100 and the conductive member 200 can be easily engaged, and thus a coil A20 having different outer sizes of the conductive member can be easily formed and attached to the stator A80.

[0057] As described above, in the first modification example, among the plurality of conductive members 100 and 200 stacked in a specified direction, the outer shape of one conductive member 200 is larger than the outer shape of the other conductive member 100. According to this configuration, as Figure 17 shown, the duty factor of the coil A20 can be improved. Figure 17 FIG. is a plan view showing an example of the coil attached to the stator in the first modification example. Figure 17 Compared with the coil A10 in the second embodiment, the coil A20 shown can improve the duty factor of the coil A20 in the stator A80 by a portion corresponding to the overhanging portion 20k and the overhanging portion 20m of the conductive member 200.

[0058] [Third Embodiment] As described above, the second embodiment in which the engaging mechanism is formed in the circumferential direction has been described, but it is not limited thereto, and an embodiment in which the engaging mechanism is formed in other directions may also be used. Figure 18 FIG. is a perspective view showing an example of the coil in the third embodiment. Figure 19 FIG. is a perspective view showing an example of the conductive member in the third embodiment. In the third embodiment, Figure 18 the coil A40 shown is formed by laminating a plurality of Figure 19 the conductive members 400 shown in the radial direction.

[0059] As Figure 19 shown, the conductive member 400 is Figure 11 similarly provided with a first plane 401, an inclined surface 404, a second plane 405, and a third plane 406 as the conductive member 100 shown. The first plane 401, the inclined surface 404, the second plane 405, and the third plane 406 extend in substantially the same directions as the first plane 101, the inclined surface 104, the second plane 105, and the third plane 106 of the conductive member 100, respectively. In addition, the inclined surface 404 is formed by bending at the broken lines 40t and 40u.

[0060] On the other hand, on the first plane 401 of the conductive member 400, two concave portions 40p and 40q are formed in a portion on the other side in the circumferential direction. The concave portion conceptually includes the shape of a groove such as the concave portion 40q. It should be noted that hereinafter, the portion of the first plane 401 located on the other side in the circumferential direction than the concave portion 40q may sometimes be referred to as the second portion 402 of the first plane 401.

[0061] In addition, in the conductive member 400, as Figure 20 shown, a part of the second plane 405 and a part of the third plane 406 are opposed to each other in the radial direction. Figure 20 It is an enlarged perspective view showing an example of the engaging mechanism in the third embodiment. Figure 20 It is to Figure 19 enlarge the part shown in the frame F1 of

[0062] As Figure 20 shown, the engaged portion 407 is formed in a portion of the second plane 405 of the conductive member 400 that is opposed to the third plane 406, and the engaging portion 408 is formed in a portion of the third plane 406 that is opposed to the second plane 405. In this case, the engaging portion 408 and the engaged portion 407 are opposed to each other in the radial direction. The engaging portion 408 and the engaged portion 407 constitute the engaging mechanism 409.

[0063] In the third embodiment, the engaging portion 408 protrudes toward the positive direction side in the radial direction. It should be noted that as Figure 20 shown, a concave portion 408a that is recessed toward the positive direction side in the radial direction may also be formed on the negative direction side in the radial direction of the engaging portion 408. The concave portion 408a may also be a hole portion.

[0064] In addition, in the third embodiment, the engaged portion 407 is a hole portion that is open in the radial direction. In addition, the engaged portion 407 may also be a concave portion formed in the radial direction. That is, in the third embodiment, the engaging portion 408 is a convex portion that protrudes in a specified direction, and the engaged portion 407 is a hole portion or a concave portion formed in the specified direction.

[0065] In this case, Figure 19The engaging portion 408 of the conductive member 4b0 shown engages with the engaged portion 407 of another conductive member 4c0 located on the positive side in the radial direction. In addition, the engaged portion 407 of the conductive member 4b0 engages with the engaging portion 408 of another conductive member 4a0 located on the negative side in the radial direction. In this configuration, the conductive members 4c0, 4b0, and 4a0 are also spiral conductive members. Further, in the third embodiment, for example, an insulating coating is also applied to the plurality of spirally engaged conductive members 400 by electrodeposition coating or the like, whereby short circuits in other parts are suppressed while maintaining the electrical connection between the engaging portion 408 and the engaged portion 407 between the conductive members 400 that are engaged with each other in the winding axis direction.

[0066] The conductive member 400 in the third embodiment is formed, for example, by processing the Figure 21 plate material 499 shown. Figure 21 FIG. is a plan view showing an example of the conductive member before processing in the third embodiment. As Figure 21 shown, in the plate material 499, the second portion 402 of the first plane 401 extends in a direction inclined toward one side in the circumferential direction with respect to the axial direction.

[0067] In the third embodiment, the conductive member 400 is formed by bending the portion 403 including the second portion 402 of the first plane 401, the inclined surface 404, and the third plane 406 in the plate material 499 in the Figure 21 and Figure 22 direction of the arrow shown, for example, a direction orthogonal to the radial direction. Figure 22 FIG. is a plan view showing an example of the manufacturing process of the conductive member in the third embodiment. In this bending process, as Figure 22 shown, the angle of the concave portion 40p gradually increases with respect to the circumferential direction, and conversely, the angle of the concave portion 40q gradually decreases with respect to the circumferential direction.

[0068] Then, the portion 403 is bent to the position shown by the dashed line in Figure 22 and is bent at the fold lines 40t and 40u. As a result, the portion 403 inclined toward one side in the circumferential direction extends toward the positive side in the axial direction. At this time, for example, the substantially circular portion 40v in the second plane 405 and the substantially circular portion 40w in the third plane 406 are opposed to each other in the radial direction. In addition, a cavity 40r having substantially the same size as the cavity 10r in the second embodiment is formed in the portion surrounded by the first plane 401, the inclined surface 404, the second plane 405, and the third plane 406.

[0069] Then, the substantially circular portions 40v and 40w that are radially opposed are pushed out, for example, toward the positive side in the radial direction, thereby forming the engaging portion 408 as a convex portion and the engaged portion 407 as a through hole.

[0070] It should be noted that the engaged portion 407 may also be a concave portion that is recessed toward the positive side in the radial direction instead of a hole portion that opens in the radial direction. In this case, for example, the following configuration may also be adopted: in a state where a plurality of conductive members 400 are arranged in the radial direction, the plurality of substantially circular portions 40v and 40w that overlap in the radial direction are punched out together. Thereby, the process of separately forming the engaging mechanism 409 can be omitted.

[0071] As described above, in the third embodiment, the engaging portion 408 is a convex portion that protrudes in a specified direction, and the engaged portion 407 is a hole portion or a concave portion formed in a specified direction. In this configuration, the workability when forming the motor coil can also be improved.

[0072] In addition, as Figure 23 shown, in the third embodiment, terminals may also be installed on the coil A40. Figure 23 is an exploded perspective view showing an example of the process of installing a terminal on a coil in the third embodiment. As Figure 23 shown, a convex portion A47 that protrudes toward the positive side in the radial direction is formed on the terminal A43, and a concave portion A48 that is recessed toward the positive side in the radial direction is formed on the terminal A44.

[0073] In the third embodiment, the convex portion A47 of the terminal A43 is engaged with the engaged portion 407 of the conductive member 4a0 located on the negative side in the radial direction, and the engaging portion 408 of the conductive member 4i0 located on the positive side in the radial direction is engaged with the concave portion A48 of the terminal A44. Through this configuration, a coil 40a with terminals A43 and A44 is formed.

[0074] [Other Modification Examples] As described above, the configurations and modification examples in each embodiment have been described, but the embodiments and modification examples are not limited thereto. For example, in the second embodiment, the shapes of the engaged portion 107 and the engaging portion 108 are not limited to Figures 10 to 12 the shapes shown, and may, for example, also include portions on a curve.

[0075] In addition, in the third embodiment, the second plane 405 and the third plane 406 are formed such that the end surface on the other side in the circumferential direction and the end surface on the positive side in the axial direction are substantially in the same plane, but are not limited thereto. For example, as Figure 24 shown, a part of the second plane 505 may protrude in any direction with respect to the third plane 406. In addition, as Figure 25As shown, a part of the third plane 506 may also protrude in any direction with respect to the second plane 405. Figure 24 It is a top view showing an example of the conductive member with terminals before processing in the second modified example. Figure 25 It is a top view showing another example of the conductive member with terminals before processing in the second modified example. In this case, the part protruding from the second plane 605 or the third plane 606 can also be used as the terminal part of the coil with terminals as Figure 26 shown. Figure 26 It is a perspective view showing an example of the coil with terminals in the second modified example. As Figure 26 shown, the coil 40b with terminals in the second modified example includes: conductive members 4b0 to 4h0; a conductive member 5a0 with terminals, on which a terminal portion A51 is formed as Figure 24 shown; and a conductive member 5i0 with terminals, on which a terminal portion A52 is formed as Figure 25 shown.

[0076] The conductive member 5a0 with terminals is formed by bending the plate material 5a9 as Figure 24 shown in the same way as the plate material 499, and the conductive member 5i0 with terminals is formed by bending the plate material 5i9 as Figure 25 shown. As Figure 24 shown, the terminal portion A51 extends from the second plane 505 of the conductive member 5a0 with terminals to the positive direction side in the axial direction. In addition, as Figure 26 shown, the terminal portion A52 extends from the third plane 506 of the conductive member 5i0 with terminals to the positive direction side in the axial direction.

[0077] In addition, similar to the plate material 499 in the third embodiment, a engaging portion 408 protruding toward the positive direction side in the radial direction is formed in the substantially circular portion 40w of the plate material 5a9, and a engaged portion 407 opening in the radial direction is formed in the substantially circular portion 40v of the plate material 5i9. The engaging portion 408 of the conductive member 5a0 with terminals engages with the engaged portion 407 of the conductive member 4b0, and the engaging portion 408 of the conductive member 4h0 engages with the engaged portion 407 of the conductive member 5i0 with terminals. Thus, as Figure 26 shown, a coil 40b with terminals having the terminal portion A51 on the negative direction side in the radial direction and the terminal portion A52 on the positive direction side in the radial direction is formed.

[0078] It should be noted that the positions where the terminal portion A51 or the terminal portion A52 is formed are not limited to Figures 24 to 26The positions shown, for example, may also be formed in any direction in the circumferential direction, other directions such as a direction inclined with respect to the axial direction, etc. The same applies to the terminals A31, A32, A43, and A44 in the second embodiment. In addition, it may be configured such that, similarly to the conductive member 600, a terminal portion is formed in the conductive member 100 in the second embodiment.

[0079] In addition, in each embodiment, the thickness in the radial direction of the second plane and the third plane is substantially the same as the thickness in the radial direction of the first plane, but as Figures 27 to 29 shown, it may also be configured such that the thickness in the radial direction varies according to each part. Figure 27 is a perspective view showing an example of the conductive member in the third modification. Figure 28 is an enlarged perspective view showing an example of the engaging mechanism in the third modification. Figure 29 is a perspective view showing an example of the coil in the third modification. Figure 28 is to Figure 27 the part shown in the frame F2 of

[0080] As Figure 27 and Figure 28 shown, in the third modification, the thickness W12 in the radial direction of the second plane 605 is smaller than the thickness W11 in the radial direction of the first plane 401. Similarly, the thickness W13 in the radial direction of the third plane 606 is also smaller than the thickness W11. It should be noted that the thickness obtained by adding the thickness W12 and the thickness W13 is, for example, substantially the same as the thickness W11.

[0081] In the third modification, the conductive members 600 are also radially engaged with each other by an engaging mechanism 609 including an engaged portion 607 and an engaging portion 608. In this case, as Figure 29 shown, the interval W14 between two adjacent conductive members 600 in the radial direction is smaller than Figure 18 the interval W10 between two conductive members 400 in the coil A40 shown in Figure 18 According to this configuration, the radial distance between the conductive members 600 can be made smaller, so that the duty factor of the coil A60 can be improved. For example, Figure 29 the coil A40 shown in

[0082] has nine conductive members 4a0 to 4i0, while Figure 28 the coil A60 shown in

[0083] In addition, in the conductive member, the position and direction where the engaging mechanism is formed are not limited to those shown above. For example, Figure 30 as shown, an engaging mechanism that engages in the axial direction can also be formed at different positions. Figure 30 FIG. is a perspective view showing an example of the conductive member in the fourth modification. As Figure 30 shown, in the fourth modification, the engaging portion 707 of the engaging mechanism 709 constituting the conductive member 700 is a convex portion that protrudes from the second plane 705 toward the negative direction side in the axial direction. In addition, the engaged portion 708 is a concave portion that is recessed from the third plane 706 toward the negative direction side in the axial direction.

[0084] In addition, in the third embodiment, the engaging mechanism is not limited to the configuration shown above, and may also be a configuration that engages in the circumferential direction in the same manner as in the second embodiment. In addition, as Figure 31 shown, the engaging mechanism may also be a configuration that engages in the axial direction. Figure 31 FIG. is a perspective view showing an example of the conductive member in the fifth modification. Figure 31 The conductive member 800 shown, for example, is formed by bending a plate material having the concave portion 40p and the concave portion 40q in a direction orthogonal to the radial direction, in the same manner as the conductive member 400, rather than by punching a ring-shaped member.

[0085] As Figure 31 shown, the engaging portion 807 of the engaging mechanism 809 protrudes toward the negative direction side in the axial direction in the same manner as the engaging portion 707 in the fourth modification, and the engaged portion 808 is recessed toward the negative direction side in the axial direction in the same manner as the engaged portion 708. It should be noted that, as Figure 31 shown, the engaging portion 807 is formed, for example, on the positive direction side in the axial direction with respect to the end face 805b on the negative direction side in the axial direction of the second plane 805. In this case, the end face 806c on the positive direction side in the axial direction of the third plane 806 protrudes more toward the positive direction side in the axial direction than the end face 805b of the second plane 805. It should be noted that the cavity 70r of the conductive member 700 in the fourth modification and the cavity 80r of the conductive member 800 in the fifth modification also have substantially the same size as the cavity 10r in the second embodiment.

[0086] [Fourth Embodiment] Next, Figure 32 will be used to describe the stator in the fourth embodiment. Figure 32 FIG. is a perspective view showing an example of the segmented core mounted on the stator core in the fourth embodiment. As Figure 32As shown, the motor B1 in the fourth embodiment includes a stator B80 and a rotor B91. The motor B1 is, for example, a so-called inner rotor type motor in which the rotor B91 is disposed on the inner side in the radial direction of the stator B80. In addition, the motor B1 is, for example, housed in a frame (not shown).

[0087] The rotor B91 is configured to be rotatable about the axis B99 as the rotation axis in the motor B1. The rotor B91 includes the axis B99, a rotor yoke (yoke), and magnets (not shown).

[0088] The axis B99 is a rotation axis and is formed in a cylindrical shape on the innermost side in the radial direction of the rotor B91. The rotor yoke is formed in a cylindrical shape from a magnetic material such as iron, for example. Moreover, the inner peripheral surface of the rotor B91 is disposed in contact with the outer peripheral surface of the axis B99.

[0089] The stator B80 includes a stator core B81 and a plurality of divided cores B2. The stator core B81 is, for example, an annular member formed by laminating a plurality of magnetic bodies such as stainless steel and magnetic steel sheets in the axial direction. As Figure 32 shown, a plurality of concave portions B84 recessed outward in the radial direction are formed on the inner peripheral surface of the stator core B81.

[0090] The plurality of divided cores B2 are respectively fixed to the concave portions B84 of the stator core B81. It should be noted that only one divided core B2 is shown in Figure 32 , but for example, one divided core B2 is housed in each of the twelve concave portions B84 shown in Figure 32 .

[0091] As Figure 33 and Figure 34 shown, the divided core B2 in the fourth embodiment includes a magnetic body B10, a housing B20, and a coil B50. Figure 33 and Figure 34 are perspective views showing an example of the divided core in the fourth embodiment. Figure 33 shows the state of observing the divided core B2 from the negative direction side in the radial direction, i.e., the inner side, Figure 34 shows the state of observing the divided core B2 from the positive direction side in the radial direction, i.e., the outer side.

[0092] As Figure 35 and Figure 36 shown, the coil B50 as a conductive member has a strip-shaped outer shape B54 wound in a spiral shape. Figure 35 and Figure 36 are exploded perspective views showing an example of the divided core in the fourth embodiment. Figure 35 shows the state of observing each component constituting the divided core B2 from the negative direction side in the radial direction, i.e., the inner side, Figure 36This shows the state of each component that makes up the split core B2 when viewed from the positive direction side in the radial direction, i.e., the outside. The coil B50 is, for example, a flat rectangular coil or the like that can increase the cross-sectional area. The coil B50 is formed by spirally winding a flat conductive member made of a metal such as copper with the radial direction as the winding axis direction. The belt-like outer shape B54 is wound in a substantially rectangular shape with respect to the winding axis direction. It should be noted that the coil B50 is an example of a conductive member.

[0093] In addition, as Figure 35 and Figure 36 shown, the coil B50 has a terminal B51 and a terminal B52 that protrude toward the positive direction side in the axial direction. The terminal B51 is located on the negative direction side in the radial direction, and the terminal B52 is located on the positive direction side in the radial direction.

[0094] In addition, the coil B50 has through holes B53a to B53c and a hole portion B54e that extend in the radial direction, i.e., the winding axis direction of the coil B50. The through holes B53a to B53c are formed, for example, in portions of the four corners of the substantially rectangular outer shape B54 where the terminals B51 and B52 are not formed. The hole portion B54e is a portion surrounded by the outer shape B54. It should be noted that the through holes B53a to B53c are an example of a plurality of fitting portions.

[0095] The magnetic body B10 is formed, for example, by laminating metal plates such as stainless steel in the axial direction. As Figure 35 shown, the magnetic body B10 has a first part B11 and a pair of second parts B12. As Figure 35 shown, the first part B11 extends outward in the winding axis direction, i.e., the radial direction. A part of the first part B11 protrudes outward in the radial direction in the split core B2 and, as Figure 32 shown, is fitted into the recess B84 of the stator core B81. The second parts B12 extend in two circumferential directions away from the first part B11.

[0096] Figure 33 and Figure 34 shown, the housing B20 is, for example, a resin-made component and has a housing B30 located on the inner side in the radial direction and a cover B40 located on the outer side in the radial direction. As Figure 35 and Figure 36 shown, the coil B50 is accommodated in the housing B30 and is covered from the outer side in the radial direction by the cover B40.

[0097] As Figure 35 and Figure 36As shown, the housing B30 has a back surface B31, an inner wall B32, and an outer wall B33. The back surface B31 is on the negative direction side in the radial direction. The inner wall B32 and the outer wall B33 extend from the back surface B31 toward the positive direction side in the radial direction. The portion surrounded by the inner wall B32 forms a through hole B32e extending in the radial direction. In addition, an opening B35e that opens toward the positive direction side in the radial direction is formed between the inner wall B32 and the outer wall B33. It should be noted that, as Figure 35 and Figure 36 shown, an opening B33d that opens toward the positive direction side in the axial direction is formed in the outer wall B33.

[0098] On the surface of the back surface B31 of the housing B30 on the positive direction side in the radial direction, three protrusions B34a to B34c that protrude outward in the radial direction, which is the winding axis direction of the coil B50, are formed. The protrusions B34a to B34c are respectively formed at positions corresponding to the through holes B53a to B53c of the coil B50. In this case, the protrusion B34a is opposed to the through hole B53a in the radial direction, the protrusion B34b is opposed to the through hole B53b in the radial direction, and the protrusion B34c is opposed to the through hole B53c in the radial direction. It should be noted that the surface of the back surface B31 of the housing B30 on the positive direction side in the radial direction is an example of the inner surface of the outer shell, and the protrusions B34a to B34c are an example of a plurality of fitting portions.

[0099] As Figure 35 and Figure 36 shown, when the coil B50 is accommodated in the housing B30, the protrusions B34a to B34c as fitting portions are respectively fitted with the through holes B53a to B53c as the fitted portions. That is, the back surface B31 of the housing B30 has a plurality of fitting portions B34a to B34c in the winding axis direction of the coil B50. In addition, the coil B50 has a plurality of fitted portions B53a to B53c in the winding axis direction of the coil B50. In addition, the fitting portions B34a to B34c of the back surface B31 of the housing B30 are protrusions extending in the winding axis direction of the coil B50, and the fitted portions B53a to B53c of the coil B50 are hole portions such as through holes. In this case, the protrusion B34a is located in the through hole B53a, the protrusion B34b is located in the through hole B53b, and the protrusion B34c is located in the through hole B53c.

[0100] In addition, as Figure 35 and Figure 36As shown, the magnetic body B10 is inserted through the through-hole B32e inside the housing B30 from the negative direction side in the radial direction. Further, the coil B50 is accommodated in the opening B35e from the positive direction side in the radial direction. In this case, the inner surface of the inner wall B32 faces and contacts the first portion B11 of the magnetic body B10. On the other hand, the outer surface of the inner wall B32 faces and contacts the hole portion B54e of the coil B50. In this case, the resin-made inner wall B32 insulates the first portion B11 of the magnetic body B10 from the coil B50. Further, as Figure 33 and Figure 34 shown, the terminals B51 and B52 of the coil B50 project from the opening B33d formed in the outer wall B33 of the housing B30 toward the positive direction side in the axial direction.

[0101] Further, the cover B40 has three through-holes B43a to B43c and a hole portion B45e. The through-holes B43a to B43c are respectively formed at positions corresponding to the protruding portions B34a to B34c of the housing B30, and the hole portion B45e is formed at a position corresponding to the inner wall B32 of the housing B30. In this case, the protruding portion B34a is fitted into the through-hole B43a, the protruding portion B34b is fitted into the through-hole B43b, and the protruding portion B34c is fitted into the through-hole B43c. Further, the hole portion B45e is fitted with the inner wall B32.

[0102] As described above, the stator in the fourth embodiment includes: a conductive member (coil B50) having a spiral-wound strip-like outer shape; an annular outer shell B20 that houses the coil B50; and a magnetic body B10 that passes through the annular outer shell B20. The back surface B31 of the outer shell B20 has a plurality of fitting portions B34a to B34c in the winding axis direction of the coil B50, and the coil B50 has a plurality of fitted portions B53a to B53c in the winding axis direction of the coil B50. According to this configuration, the conductive member can be more reliably fixed to the stator, and thus the vibration resistance can be improved.

[0103] Note that, from the viewpoint of increasing the cross-sectional area of the coil B50, it is preferable to reduce the cross-sectional areas of the through-holes B53a to B53c formed in the coil B50.

[0104] The configuration in the fourth embodiment has been described above, but the embodiment is not limited thereto. For example, the protruding portions B34a to B34c may be formed on the cover B40, or the cover may be located on the negative direction side in the radial direction. Further, the configuration in which the outer shell B20 includes the housing B30 and the cover B40 has been described, but the housing and the cover may be integrally formed.

[0105] In addition, the through-holes B53a to B53c of the coil B50 are hole portions that penetrate in the winding axis direction, but are not limited thereto, and may also be recessed portions that do not penetrate in the winding axis direction. In this case, it is also possible that the cover B40 is also formed with a protruding portion that protrudes toward the positive direction side in the winding axis direction, and the coil has a recessed portion that engages with the protruding portions B34a to B34c of the outer shell B20 and is recessed toward the negative direction side in the winding axis direction, and a recessed portion that engages with the protruding portion of the cover B40 and is recessed toward the positive direction side in the winding axis direction.

[0106] In addition, a configuration in which both the terminal B51 and the terminal B52 protrude toward the positive direction side in the axial direction has been described, but the embodiment is not limited thereto. For example, the terminal may protrude in other directions such as the negative direction side in the axial direction and the outer side in the radial direction. In addition, the two terminals may also face different directions.

[0107] [Sixth Modification Example] In addition, as Figure 37 shown, it is also possible to have a configuration in which the second part of the magnetic body and the outer surface of the outer shell facing the second part of the magnetic body are fitted in the winding axis direction of the conductive member. Figure 37 It is a perspective view showing an example of the split core in the sixth modification example.

[0108] As Figure 37 shown, the split core B3 in the sixth modification example includes a magnetic body B100, a coil B50, and an outer shell B200. The outer shell B200 includes a housing B300 and a cover B40. It should be noted that the shape of the split core B3 in the sixth modification example as viewed from the positive direction side in the radial direction is substantially the same as the shape of the split core B2 shown in Figure 34 .

[0109] As Figure 38 and Figure 39 shown, in the sixth modification example, two recessed portions B12a and B12b that are recessed toward the outer side in the radial direction are formed in the second part B120 of the magnetic body B100. Figure 38 and Figure 39 are exploded perspective views showing an example of the split core in the sixth modification example. As Figure 38 shown, the two recessed portions B12a and B12b are respectively formed on one side and the other side in the circumferential direction of the first part B11 of the magnetic body B100. It should be noted that the recessed portions B12a and B12b are examples of the engaged portions of the second part of the magnetic body.

[0110] In addition, as Figure 38As shown, the surface on the negative direction side in the radial direction of the back surface B310 of the housing B300 has a protrusion B31a and a protrusion B31b. The protrusion B31a is formed at a position opposed to the recess B12a in the radial direction, and the protrusion B31b is formed at a position opposed to the recess B12b in the radial direction. It should be noted that the surface on the negative direction side in the radial direction of the back surface B310 of the housing B300 is an example of the outer surface of the housing, and the protrusions B31a and B31b are examples of the fitting portions of the outer surface of the housing.

[0111] In the sixth modification, as Figure 37 shown, the protrusion B31a is fitted into the recess B12a of the second portion B120 of the magnetic body B100. Similarly, the protrusion B31b is fitted into the recess B12b. That is, the fitting portions B31a and B31b of the back surface B310 of the housing B200 opposed to the second portion B120 of the magnetic body B100 are protrusions extending in the winding axis direction of the coil B50, the fitted portions B12a and B12b of the second portion B120 of the magnetic body B100 are recesses, and the protrusion B31a is located within the recess B12a. In addition, the protrusion B31b is located within the recess B12b.

[0112] It should be noted that, instead of forming a recess in the magnetic body B100 and forming a protrusion in the housing B200, a protrusion may be formed in the magnetic body and a recess or a notch may be formed in the housing. In addition, a configuration may be such that a recess is formed on one side in the circumferential direction of the magnetic body B100 and a protrusion is formed on the other side. In this configuration, a protrusion is formed on one side in the circumferential direction of the housing B300 and a recess is formed on the other side, whereby the magnetic body B100 is fitted to the housing B300.

[0113] As described above, in the stator of the sixth modification, the magnetic body B100 includes: a first portion B11 extending in the winding axis direction of the coil B50; and a second portion B120 extending in a direction away from the first portion B11. In addition, in the winding axis direction of the coil B50, the second portion B120 of the magnetic body B100 and the back surface B310 of the housing B300 opposed to the second portion B120 of the magnetic body B100 are fitted. According to this configuration, by further fitting the housing B200 fixed with the coil B50 to the magnetic body B100, the vibration resistance of the segmented core B3 can be further improved.

[0114] [Seventh Modification] In addition, as Figure 36As shown, the outer shape of the coil B50 in the fourth embodiment is substantially the same as the inner shape of the outer wall B33 of the housing B20, but the embodiment is not limited thereto. For example, in the case where the outer shape of the conductive member is smaller than the inner diameter of the outer wall B33 of the housing, the gap between the outer wall B33 of the housing and the conductive member accommodated in the housing may also be covered with a resin such as varnish.

[0115] Figure 40 1 is a perspective view showing an example of a process of mounting the coil to the housing in the seventh modification. Figure 40 As shown, in the split core B4 in the seventh modification, the width W22 of the outer shape B64 of the coil B60 is slightly smaller than the width W21 of the opening B35e. In this case, the outer shape B64 of the coil B60 in the seventh modification is opposite to the outer wall B33 of the housing B20 with a gap G1 therebetween. It should be noted that the coil B60 is another example of a conductive member.

[0116] Figure 41 : is a perspective view showing an example of a split core in the seventh modification. Figure 41 As shown in FIG. 1 , the width W23 of the terminals B61 and B62 of the coil B60 is smaller than the width of the terminals B51 and B52 of the coil B50 of the split core B3 in the sixth variation. In this case, a gap G2 is formed between the end of the coil B60 on one side in the circumferential direction of the opening B33d and the terminals B61 and B62. It should be noted that, except for the width of the terminals B61 and B62 mentioned above, the appearance of the split core B4 is similar to that of the split core B4. Figure 33 and Figure 34 The split cores B2 shown have substantially the same appearance.

[0117] In the seventh modification, after the coil B60 is accommodated in the housing B20, a liquid resin such as varnish is filled in the gap G1 and the gap G2 between the coil B60 and the outer wall B33 of the housing B30 of the housing B20. For example, the resin is filled from the opening B33d of the housing B30 toward the negative direction in the axial direction. Then, the filled resin is cured to form a resin member B69.

[0118] Figure 42 It is a cross-sectional perspective view showing an example of a split core in a seventh modification. Figure 42 Indicates that Figure 41 The cross section is obtained by cutting at plane S1. Figure 42 As shown, the outer shape B64 of the coil B60 is opposite to the outer wall B33 of the housing B30 via the resin member B69 as another member. In this case, the coil B60 is fixed to the housing B20 via the resin member B69. It should be noted that the opening B33d may also be covered by the resin member B69.

[0119] In this configuration, a resin member B69 is provided inside the housing B20, and the resin member B69 covers a part of the coil B60. As a result, the coil B60 is more reliably fixed to the divided core B4. In addition, vibrations are absorbed by the resin member B69, so that transmission of vibrations of the motor B1 to the coil B60 is further suppressed. Moreover, heat dissipation from the coil B60 is promoted via the resin member B69 having good thermal conductivity and the housing B20.

[0120] [Eighth Modification Example] In addition, as Figure 43 shown, the conductive member may be configured to have recesses that are radially opposed to the protrusions B34a to B34c instead of having through-holes B53a to B53c that engage with the protrusions B34a to B34c. Figure 43 is a perspective view showing an example of the process of mounting the coil in the housing in the eighth modification example. Figure 43 The coil B600 shown has a recess B65a in which a part of the outer shape B640 is cut out at a position radially opposed to the protrusion B34a of the housing B30. Similarly, the coil B600 has a recess B65b at a position radially opposed to the protrusion B34b and a recess B65c at a position radially opposed to the protrusion B34c.

[0121] In this configuration, when the coil B600 is housed in the housing B30, as Figure 44 shown, the recesses B65a to B65c of the coil B600 are respectively in contact with the protrusions B34a to B34c of the housing B30 in the axial and circumferential directions. Figure 44 is a perspective view showing an example of the coil housed in the housing in the eighth modification example. Figure 44 shows a state in which the cover B40 and the magnetic body B10 are removed from the divided core B5 in the eighth modification example. It should be noted that the shape of the divided core B5 in the eighth modification example is substantially the same as the shape of the divided core B4 in the Figure 41 seventh modification example shown.

[0122] Similar to the seventh modification example, as Figure 44 shown, a resin member B691, which is a part of the resin member B690, exists in the gap between the outer shape B640 of the coil B600 housed in the housing B30 and the outer wall B33 of the housing B30.

[0123] In addition, in the eighth modification example, as Figure 44 and Figure 45 shown, a part B69b of the resin member B690 exists between the recess B65b and the outer wall B33. Figure 45 is an enlarged perspective view showing an example of the engaging portion of the coil housed in the housing in the eighth modification example.Figure 45 is a view showing an enlarged portion of the frame F3 shown in Figure 44 Similarly, a part B69a of the resin member B690 exists between the recess B65a and the outer wall B33, and a part B69c of the resin member B690 exists between the recess B65c and the outer wall B33. According to this configuration, the volume of the resin member B690 that fixes the fixed coil B600 can be increased, so that the vibration resistance can be further improved.

[0124] It should be noted that in the case where the conductive member can be fixed to the housing by the resin member B69 or the like as in the seventh modification and the eighth modification, for example, the housing may not have a configuration such as the cover B40.

[0125] In addition, the stator and the coil in each embodiment and each modification can also be used for a so-called outer-rotor type motor in which the stator is located radially inside the rotor.

[0126] It should be noted that each embodiment and each modification can be appropriately combined. For example, in the seventh modification and the eighth modification, the magnetic body B100 and the housing B200 shown in the sixth modification can also be used instead of the magnetic body B10 and the housing B20 shown in the fourth embodiment.

[0127] As described above, the present invention has been described based on each embodiment and each modification, but the present invention is not limited to the embodiments and each modification, and of course, various changes can be made without departing from the gist of the present invention. The solutions obtained by making various changes without departing from such a gist are also included in the technical scope of the present invention, which is obvious to those skilled in the art from the description of the claims. Explanation of reference numerals

[0128] 1. A1: Motor; 2, A10, A20, A40, A60, B50, B60, B600: Coils; 10a, 40a, 40b: Coils with terminals; 10: First wire; 11: One end; 12: The other end; 13, 14: Hole parts; 15, 16, 17, 18: Sides; 30, 40: Second wires; 31, 41: One end; 32, 42: The other end; A31, A32, A43, A44, B51, B52, B61, B62: Terminals; A51, A52: Terminal parts; 40p, 40q: Recesses; 80, B80: Stators; 81, B81: Stator cores; 82: Teeth; 83: Insulators; B84: Recess; A90, 91, B91: Rotors; A91: Rotor yoke; A92: Magnet; 99, B99: Shafts; 100, 200, 400, 600, 700, 800: Conductive members; 101, 201, 401: First planes; 104, 204, 404: Inclined surfaces; 105, 205, 405, 505, 605, 705, 805: Second planes; 106, 206, 406, 506, 606, 706, 806: Third planes; 108, 408, 608, 707, 807: Engaging parts; 107, 407, 607, 708, 808: Parts to be engaged; 109, 409, 609, 709, 809: Engaging mechanisms; B2, B3, B4, B5: Divided cores; B10, B100: Magnetic bodies; B11: First part; B12, B120: Second part; B20, B200: Housings; B30, B300: Casings; B31, B310: Backs; B31a - B31b: Protrusions; B32: Inner walls; B32e: Through holes; B33: Outer walls; B33d: Openings; B34a - B34c: Protrusions; B35e: Openings; B40: Covers; B43a - B43c: Through holes; B45e: Hole parts; B53a - B53c: Through holes; B54, B64, B640: Outer shapes; B54e: Hole parts; B65a - B65c: Recesses; B69, B690: Resin members.

Claims

1. A coil for a motor, the coil for the motor comprising: A first wire wound in the winding axis direction; and A second wire connected to the first wire, The first wire includes: a side surface extending in the circumferential direction of the first wire; and a hole portion formed in the side surface, A part of the second wire is disposed within the hole portion.

2. The coil for a motor according to claim 1, wherein The second wire has one end and the other end on the side of the first wire, The one end is located within the hole portion, The other end becomes a terminal connected to an external device.

3. A stator, the stator comprising: The coil for a motor according to claim 1 or 2; An insulator; and A stator core surrounded by the coil for the motor with the insulator therebetween.

4. A motor, the motor comprising: The stator according to claim 3; and A rotor, The second wire extends in the direction of the rotation axis of the rotor.

5. A coil for a motor, Comprising a plurality of conductive members stacked in a specified direction, In the specified direction, the plurality of conductive members are engaged with each other.

6. The coil for a motor according to claim 5, wherein The plurality of conductive members each include an engaging portion and an engaged portion.

7. The coil for a motor according to claim 6, wherein The engaging portion of the first conductive member among the plurality of conductive members is engaged with the engaged portion of the second conductive member located on one side in the specified direction, The engaged portion of the first conductive member is engaged with the engaging portion of the third conductive member located on the other side in the specified direction, The second conductive member, the first conductive member, and the third conductive member are spiral conductive members.

8. The coil for a motor according to claim 7, wherein The engaging portion is a convex portion protruding in the circumferential direction, The engaged portion is a concave portion recessed in the circumferential direction.

9. The coil for a motor according to claim 7, wherein The engaging portion is a convex portion protruding in the specified direction, The engaged portion is a hole portion or a concave portion formed in the specified direction.

10. The coil for a motor according to any one of claims 5 to 9, wherein Among the plurality of conductive members stacked in the specified direction, the outer shape of one conductive member is larger than the outer shape of the other conductive member.

11. A motor, the motor comprising: The coil for a motor according to claim 5; A stator having an insulator and a stator core, the stator core being surrounded by the coil for the motor with the insulator therebetween; and A rotor.

12. A stator, the stator comprising: A conductive member having a strip-shaped outer shape wound in a spiral shape; An annular outer shell that houses the conductive member; and A magnetic body passing through the annular outer shell, The inner surface of the outer shell has a plurality of fitting portions in the winding axis direction of the conductive member, The conductive member has a plurality of fitted portions in the winding axis direction of the conductive member.

13. The stator according to claim 12, wherein There is a resin member within the outer shell, The resin member covers a part of the conductive member.

14. The stator according to claim 12, wherein The fitting portion on the inner surface of the housing is a protruding portion extending in the winding axis direction of the conductive member, The fitted portion of the conductive member is a hole portion, The protruding portion is located within the hole portion.

15. The stator according to any one of claims 12 to 14, wherein, The magnetic body includes: A first portion extending in the winding axis direction of the conductive member; and A second portion extending in a direction away from the first portion, In the winding axis direction of the conductive member, the second portion of the magnetic body and the outer surface of the housing opposing the second portion of the magnetic body are fitted together.

16. The stator according to claim 15, wherein, The fitting portion on the outer surface of the housing opposing the second portion of the magnetic body is a protruding portion extending in the winding axis direction of the conductive member, The fitted portion of the second portion of the magnetic body is a concave portion, The protruding portion is located within the concave portion.

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