Stator and motor

Abstract

The stator (1) has a ring-shaped core seat formed by a magnet, a plurality of teeth protruding radially inward from the core seat, and slots (5) formed between adjacent teeth. The stator (1) has: a first insulator (6A) disposed at one end of the stator (1) along the central axis of the core seat; a second insulator disposed at the other end of the stator (1) along the central axis; a coil wire (7) continuously wound around adjacent teeth; and a conductive terminal fixed to the first insulator (6A) to hold the coil wire (7). The coil wire (7) includes a jumper wire extending from one of two adjacent teeth toward the other. A first cavity (61a) is formed in the first insulator (6A) for inserting the terminal. A jumper wire is arranged in the second insulator.

Description

Technical Field

[0001] The present invention relates to a stator in which coil wires are continuously wound around adjacent teeth, and a motor having the stator. Background Art

[0002] Conventionally, there is known an electric motor having a stator in which a coil wire is continuously wound around adjacent teeth. The coil wire includes a jumper wire arranged between adjacent teeth.

[0003] For example, Patent Document 1 describes a stator having a conductive terminal for connecting a coil wire and a lead wire, and an insulator having a cavity into which the terminal is inserted, wherein the coil wire is continuously wound around adjacent teeth. In the stator described in Patent Document 1, the cavity and the jumper wire are arranged at one end of the stator along the central axis.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2003-111362 Summary of the invention

[0005] However, in the stator described in Patent Document 1, the cavity and the jumper are arranged at one end of the stator along the central axis, so the cavity and the jumper sometimes interfere with each other. In order to avoid such interference, the position of the cavity needs to be offset relative to the jumper along the central axis, but this has the problem of increasing the size of the motor along the central axis.

[0006] The present invention has been made in view of the above circumstances, and an object of the present invention is to obtain a stator capable of suppressing an increase in the size of a motor along the central axis even when a coil wire is continuously wound around adjacent teeth and a cavity is provided in an insulator.

[0007] In order to solve the above-mentioned problems and achieve the purpose, the stator involved in the present invention has a ring-shaped core seat formed by a magnet, a plurality of teeth protruding radially inward from the core seat, and slots formed between adjacent teeth. The stator has: a first insulator, which is arranged at one end of the stator along the central axis of the core seat; a second insulator, which is arranged at the other end of the stator along the central axis; a coil wire, which is continuously wound around every two adjacent teeth; and a conductive terminal, which is fixed to the first insulator to hold the coil wire. The coil wire includes a jumper extending from one of two adjacent teeth toward the other. A cavity for inserting the terminal is formed in the first insulator. A jumper is arranged in the second insulator. The tooth has a winding portion for winding the coil wire. The winding portion is formed in a rectangular parallelepiped shape whose length along the central axis direction is longer than the length in the circumferential direction, and has two long sides extending along the central axis and two short sides shorter than the long sides and extending in the circumferential direction. When one end of the stator where the connection terminal is arranged is set as the connection side, and the other end of the stator and the opposite side to the connection terminal is set as the opposite side to the connection, one of the two adjacent teeth is provided with a winding start portion of the coil wire extending from the connection side to the opposite side of the connection along one long side portion and a guide portion that offsets the coil wire wound along the other long side portion radially inward. The cross-sectional shape of the guide portion after cutting in a direction orthogonal to the central axis is polygonal. The other of the two adjacent teeth is provided with a winding end portion of the coil wire extending from the opposite side of the connection to the connection side along one long side portion. The teeth provided with the guide portion on the other long side portion and the teeth without the guide portion are alternately arranged in the circumferential direction. The portion arranged on the short side portion on the connection side of the coil wire in each tooth extends along the extension direction of the short side portion. The portion arranged on the short side portion on the opposite side of the connection of the coil wire in each tooth extends obliquely relative to the extension direction of the short side portion.

[0008] Effects of the Invention

[0009] According to the present invention, there is an effect that even when the coil wire is continuously wound around adjacent teeth and the cavity is provided in the insulator, an increase in the size of the motor along the central axis can be suppressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a cross-sectional view of the electric motor including the stator according to the first embodiment cut along a direction perpendicular to the central axis.

[0011] Figure 2 This is a perspective view showing one end portion of the stator according to the first embodiment along the central axis.

[0012] Figure 3 It is a perspective view showing the other end portion of the stator according to the first embodiment along the central axis.

[0013] Figure 4 It is a perspective view showing the first insulator and the connection terminal.

[0014] Figure 5 This is a cross-sectional view showing the state where the coil wire and lead wire are connected to the terminal. Figure 4 A cross-sectional view of the first insulator and the connecting terminal taken along the VV line is shown.

[0015] Figure 6 This is an explanatory diagram for explaining the order in which the coil wire is wound around adjacent teeth.

[0016] Figure 7 This is a cross-sectional view of a core holder, teeth, and coil wires included in the stator according to the second embodiment cut along a direction perpendicular to the central axis.

[0017] Figure 8 It is a perspective view showing teeth, coil wires, first insulators, and second insulators included in the stator according to the third embodiment.

[0018] Fig. 9 This is a cross-sectional view of a core holder, teeth, and coil wires included in the stator according to the fourth embodiment cut along a direction perpendicular to the central axis.

[0019] Fig.10 This is a cross-sectional view of the stator according to the fifth embodiment cut along a direction perpendicular to the central axis.

[0020] Fig.11 This is a diagram of a core holder, teeth, and coil wires included in a stator according to a sixth embodiment as viewed along the central axis.

[0021] Fig.12 This is a cross-sectional view of a core holder, teeth, coil wires, and guide portions included in the stator according to the seventh embodiment cut along a direction perpendicular to the central axis.

[0022] Fig.13 It is an explanatory diagram for explaining a winding process of a coil wire according to the seventh embodiment, and is a diagram schematically showing a state of two adjacent teeth viewed from the connection side.

[0023] Fig.14 This is an explanatory diagram for explaining a winding process of a coil wire according to the seventh embodiment, and is a diagram schematically showing a state of two adjacent teeth viewed from the opposite side of the connection. DETAILED DESCRIPTION

[0024] Hereinafter, a stator and a motor according to the embodiment will be described in detail with reference to the drawings.

[0025] Implementation method 1.

[0026] Figure 1This is a cross-sectional view of the electric motor 100 having the stator 1 involved in Embodiment 1 cut in a direction perpendicular to the center axis C. The electric motor 100 has a stator 1, a rotor 12 and a frame 13. The stator 1 is formed in a cylindrical shape having a center axis C. The rotor 12 is arranged on the inner side of the stator 1. A gap is provided between the rotor 12 and the stator 1. The rotor 12 is connected to a shaft not shown in the figure and can rotate about the center axis C as a rotation axis. The frame 13 accommodates the stator 1 and the rotor 12. The frame 13 is formed in a cylindrical shape. Below, when describing the directions with respect to each structural element of the electric motor 100, the center axis C, radial direction, and circumferential direction of the cylindrical core seat 3 described later are used as a reference.

[0027] The stator 1 has a stator core 2 and a coil wire 7. The stator core 2 has a cylindrical core base 3 formed of a magnet and a plurality of teeth 4 protruding radially inward from the inner circumferential surface of the core base 3. Slots 5 are formed between adjacent teeth 4. A coil wire 7 directed toward a connection terminal 9 described later is arranged in each slot 5. The teeth 4 will be described in detail later.

[0028] Figure 2 1 is a perspective view showing one end portion of the stator 1 according to the first embodiment along the central axis C. A plurality of first insulators 6A are provided at one end portion of the stator 1 along the central axis C. Figure 2 In the figure, two first insulators 6A are shown, but in reality, the same number of first insulators 6A as the teeth 4 are provided. Each of the plurality of first insulators 6A includes a first outer peripheral wall 61, a first inner peripheral wall 62 arranged radially inward of the first outer peripheral wall 61, and a first connecting portion 63 located between the first outer peripheral wall 61 and the first inner peripheral wall 62.

[0029] The first outer peripheral wall 61 extends in the circumferential direction. The first outer peripheral wall 61 is formed with a first cavity 61a into which the connecting terminal 9 described later is inserted, a second cavity 61b through which the coil wire 7 passes, and a third cavity 61c through which the lead wire 8 described later passes. The first cavity 61a extends approximately in the circumferential direction. The second cavity 61b and the third cavity 61c extend in the radial direction and intersect with a portion of the first cavity 61a. The second cavity 61b and the third cavity 61c are arranged at intervals from each other in the circumferential direction. The first inner peripheral wall 62 extends in the circumferential direction. The first connecting portion 63 extends in the circumferential direction to connect the first outer peripheral wall 61 and the first inner peripheral wall 62.

[0030] Figure 3 1 is a perspective view showing the other end portion of the stator 1 according to the first embodiment along the central axis C. A plurality of second insulators 6B are provided at the other end portion of the stator 1 along the central axis C. Figure 32, but in reality, the second insulators 6B are provided in the same number as the teeth 4. Each of the plurality of second insulators 6B includes a second outer peripheral wall 64, a second inner peripheral wall 65 arranged radially inward of the second outer peripheral wall 64, and a second connecting portion 66 located between the second outer peripheral wall 64 and the second inner peripheral wall 65.

[0031] The second outer peripheral wall 64 extends in the circumferential direction. A jumper line 75 described later is disposed on the second outer peripheral wall 64. The second inner peripheral wall 65 extends in the circumferential direction. The second connecting portion 66 extends in the circumferential direction and connects the second outer peripheral wall 64 and the second inner peripheral wall 65. Figure 1 Although omitted in the figure, an insulator covering the teeth 4 is actually provided, and the insulator, the first insulator 6A, and the second insulator 6B are integrally molded.

[0032] Figure 4 It is an oblique view showing the first insulator 6A and the terminal 9. The terminal 9 is inserted into the first cavity 61a. The terminal 9 is a conductive metal component that allows the coil wire 7 and the lead wire 8 to be electrically connected. The terminal 9 is formed by performing a hole-making process and a bending process on a piece of metal plate. The terminal 9 is bent into a U-shape and has two opposite side walls 91 and a bottom wall 92 that connects the side walls 91 to each other. By inserting the terminal 9 into the first cavity 61a, the terminal 9 is fixed to the first insulator 6A. Each of the cavities 61a to 61c and the terminal 9 are arranged at one end of the stator 1 along the central axis C. In the following, one end of the stator 1 where the terminal 9 is arranged is set as the connection side, and the other end of the stator 1 and the opposite side of the terminal 9 are set as the opposite connection side.

[0033] Figure 5 is a cross-sectional view showing the state in which the coil wire 7 and the lead wire 8 are connected to the connection terminal 9. Figure 4 The VV line cross-sectional view of the first insulator 6A and the connecting terminal 9 is shown. Figure 4 and Figure 5 As shown, the first slit 93 for holding the coil wire 7 and the second slit 94 for holding the lead wire 8 are formed in the connection terminal 9. The first slit 93 and the second slit 94 extend from one side wall 91 through the bottom wall 92 to the other side wall 91. When the connection terminal 9 is inserted into the first cavity 61a, the first slit 93 communicates with the second cavity 61b, and the second slit 94 communicates with the third cavity 61c.

[0034] like Figure 5 As shown in FIG. 1 , the coil wire 7 is an insulated conductor in which a conductive core wire 71 is covered by an insulating coating 72. Figure 5In the figure, for convenience of explanation, the insulating coating 72 is shown by a dotted line. The core wire 71 is, for example, a copper wire. Electric power is supplied to the coil wire 7 from an inverter (not shown) via a lead wire 8. The coil wire 7 will be described in detail later.

[0035] The lead wire 8 is an insulated conductor having a plurality of conductive strands of wires 81 which are collectively covered with an insulating coating 82. Figure 5 In the figure, for convenience of explanation, the insulating coating 82 is shown by a dotted line. The conductive wire 81 is, for example, a copper wire. The lead wire 8 connects an inverter (not shown) and the motor 100. The lead wire 8 is a conductor for supplying power from the inverter (not shown) to each coil.

[0036] The width of the first slit 93 is formed to be smaller than the outer diameter of the portion of the coil wire 7 covered by the insulating coating 72. Therefore, when the connection terminal 9 is inserted into the first cavity 61a, the insulating coating 72 of the coil wire 7 is cut off at the inner wall of the first slit 93 to expose the core wire 71. As a result, the core wire 71 of the coil wire 7 and the connection terminal 9 come into contact, and the coil wire 7 and the connection terminal 9 are electrically connected. The portion of the coil wire 7 that is only held in the first slit 93 is the portion where the insulating coating 72 is stripped off and the core wire 71 is electrically connected to the connection terminal 9. The portion of the coil wire 7 that is only held in the first slit 93 is the portion where the core wire 71 is crimped against the inner wall of the first slit 93 in a state where the insulating coating 72 is stripped off. The insulating coating 72 remains in the coil wire 7 except for the portion held in the first slit 93.

[0037] The width of the second slit 94 is formed smaller than the outer diameter of the portion of the lead wire 8 covered by the insulating coating 82. Therefore, when the connection terminal 9 is inserted into the first cavity 61a, the insulating coating 82 of the lead wire 8 is scraped off at the inner wall of the second slit 94 to expose the conductive wire 81. As a result, the conductive wire 81 of the lead wire 8 comes into contact with the connection terminal 9, and the lead wire 8 and the connection terminal 9 are electrically connected. The insulating coating 82 is stripped off at the portion of the lead wire 8 that is only held in the second slit 94, and the conductive wire 81 is electrically connected to the connection terminal 9. At the portion of the lead wire 8 that is only held in the second slit 94, the stranded wire having a plurality of conductive wires 81 is crimped to the inner wall of the second slit 94 in a state where the insulating coating 82 is stripped off. The insulating coating 82 remains at the portion of the lead wire 8 except for the portion held in the second slit 94.

[0038] Here, refer to Figure 6 The teeth 4 and the coil wire 7 will be described in more detail. Figure 6This is an explanatory diagram for explaining the order of winding the coil wire 7 around the adjacent teeth 4. The tooth 4 has a winding portion 41 for winding the coil wire 7. The winding portion 41 is formed into a rectangular parallelepiped shape that is longer along the central axis C than in the circumferential direction. The winding portion 41 has two long sides 42 extending in the central axis C and two short sides 43 extending in the circumferential direction and shorter than the long sides 42. The two long sides 42 are separated from each other in the circumferential direction. The short sides 43 are separated from each other along the central axis C. One short side 43 connects one end of the two long sides 42 along the central axis C to each other. The other short side 43 connects the other end of the two long sides 42 along the central axis C to each other.

[0039] The coil wire 7 is continuously wound around adjacent teeth 4. The coil wire 7 is wound around the winding portion 41 of the tooth 4 to form the coil 10. Hereinafter, when two adjacent teeth 4 are distinguished, one tooth 4 is referred to as tooth 4a and the other tooth 4 is referred to as tooth 4b.

[0040] The coil wire 7 is wound starting from the connection side of the tooth 4a and wound multiple times on the winding portion 41. Then, the coil wire 7 is bridged from the tooth 4a to the tooth 4b on the opposite connection side. That is, the winding is changed from the tooth 4a to the tooth 4b. The coil wire 7 is wound multiple times on the winding portion 41 of the tooth 4b and ends on the connection side of the tooth 4b. The coil wire 7 includes a winding start portion 73, a winding end portion 74, and a bridge line 75.

[0041] The jumper wire 75 extends from one tooth 4a of two adjacent teeth 4a and 4b toward the other tooth 4b on the opposite side of the connection. Figure 2 As shown, the winding start portion 73 of the coil wire 7 is held in the second cavity 61b of one of the two adjacent first insulators 6A, and the winding end portion 74 of the coil wire 7 is held in the second cavity 61b of the other of the two adjacent first insulators 6A. Figure 2 and Figure 4 The cavities 61 a - 61 c and the connection terminals 9 shown are arranged at one end portion along the central axis C of the stator 1 . Figure 3 The jumper wire 75 shown is arranged at the other end of the stator 1 along the central axis C. The jumper wire 75 is arranged radially outward from the radial center of the second insulator 6B. In the present embodiment, the jumper wire 75 is arranged on the second outer peripheral wall 64 of the second insulator 6B.

[0042] Next, the effects of the stator 1 according to the present embodiment will be described.

[0043] In this embodiment, if Figure 2 As shown in FIG. 1 , a first insulator 6A is provided at one end of the stator 1 along the central axis C, and a first cavity 61a, a second cavity 61b, and a third cavity 61c are formed in the first insulator 6A. Figure 3As shown in FIG. 1 , a second insulator 6B is provided at the other end of the stator 1 along the central axis C, and a jumper wire 75 is disposed on the second insulator 6B. Thus, the positions of the cavities 61a to 61c are not restricted by the jumper wire 75, and interference between the cavities 61a to 61c and the jumper wire 75 can be avoided. Furthermore, the cavities 61a to 61c can be disposed close to the winding portion 41, so that an increase in the size of the motor 100 along the central axis C can be suppressed.

[0044] In this embodiment, if Figure 3 As shown, the jumper wire 75 is arranged radially outward relative to the radial center of the second insulator 6B, thereby preventing the winding of the coil wire 7 from loosening, thereby improving the winding line.

[0045] Implementation method 2.

[0046] Figure 7 This is a cross-sectional view obtained by cutting the core base 3 , the teeth 4 , and the coil wire 7 included in the stator 1 according to the second embodiment in a direction perpendicular to the central axis C. Figure 7 This is a cross-sectional view of the tooth 4 and the like as viewed from the connection side. Figure 7 In the figure, for convenience of explanation, one tooth 4 is shown. In the second embodiment, the same reference numerals are given to the parts that overlap with those in the first embodiment, and the explanation thereof is omitted.

[0047] The winding start portion 73 of the coil wire 7 is arranged radially outward from the radial center of the winding portion 41 of the tooth 4. In the present embodiment, the winding start portion 73 of the coil wire 7 is the radially outermost portion of the winding portion 41, that is, the boundary portion of the core base 3 arranged in the winding portion 41.

[0048] In the present embodiment, the winding start portion 73 of the coil wire 7 is arranged radially outward compared to the radial center of the winding portion 41 of the tooth 4. That is, the winding of the coil wire 7 to the tooth 4 starts from the radial outward compared to the radial center of the tooth 4. Thus, interference between the winding start portion 73 of the coil wire 7 and portions other than the winding start portion 73 can be avoided, and the winding of the coil wire 7 to the tooth 4 becomes easy. Therefore, the manufacturing device for winding the coil wire 7 around the tooth 4 can be simplified. In addition, the winding of the coil wire 7 to the tooth 4 starts from the radial outward compared to the radial center of the tooth 4, thereby ensuring a gap between adjacent coils 10 not shown in the figure, and thus improving the insulation resistance.

[0049] Implementation method 3.

[0050] Figure 8 1 is a perspective view showing teeth 4, coil wire 7, first insulator 6A, and second insulator 6B included in stator 1 according to Embodiment 3. Figure 8In the figure, for convenience of explanation, two teeth 4, two first insulators 6A, and two second insulators 6B are shown. In the third embodiment, the same reference numerals are used for the parts that overlap with those in the first embodiment, and the explanation thereof is omitted.

[0051] The coil wire 7 has a first layer rising portion 76 that rises in layers at the long side portion 42 and a second layer rising portion 77 that rises in layers at the short side portion 43. The first layer rising portion 76 is located at the uppermost layer of the coil wire 7 wound on the winding portion 41 of the tooth 4. That is, in the last turn from the connection side toward the opposite connection side, or from the opposite connection side toward the connection side, the layers of the coil wire 7 are raised in the long side portion 42, and in addition to the last turn, the layers of the coil wire 7 are raised in the short side portion 43. In this specification, the last turn refers to the final winding of the coil wire 7 for each tooth 4. In addition, in this specification, the layer rising means that the winding of the lower layer of the coil wire 7 ends, the winding of the upper layer of the coil wire 7 starts, and the coil wire 7 is located at the uppermost layer in the last turn.

[0052] In the present embodiment, the coil wire 7 has a first layer rising portion 76 rising in the long side portion 42 and a second layer rising portion 77 rising in the short side portion 43. That is, when the coil wire 7 is wound around the tooth 4, the portion of the coil wire 7 rising in the long side portion 42 and the portion of the coil wire 7 rising in the short side portion 43 are mixed. Thus, the size of the coil end can be suppressed, and thus the increase in the size of the motor 100 along the central axis C can be suppressed. In addition, the layer rise of the coil wire 7 can be performed in the long side portion 42 except for the last turn.

[0053] Implementation method 4.

[0054] Fig. 9 This is a cross-sectional view obtained by cutting the core base 3 , the teeth 4 , and the coil wire 7 included in the stator 1 according to the fourth embodiment in a direction perpendicular to the central axis C. Fig. 9 This is a cross-sectional view of the tooth 4 and the like as viewed from the connection side. Fig. 9 In the figure, for the sake of convenience of explanation, four teeth 4 are shown, and three first-layer rising portions 76 are shown without showing one first-layer rising portion 76 by a cross section. In addition, in embodiment 4, the parts repeated in the aforementioned embodiment 1 are marked with the same reference numerals and the description is omitted. Hereinafter, when a plurality of teeth 4 are distinguished, they are referred to as teeth 4a, 4b, 4c, and 4d. When a plurality of slots 5 are distinguished, they are referred to as slots 5a, 5b, and 5c. When the coil wires 7 wound around the plurality of teeth 4 are distinguished, they are referred to as coil wires 7a, 7b, 7c, and 7d. When the first-layer rising portions 76 of each of the plurality of coil wires 7 are distinguished, they are referred to as first-layer rising portions 76a, 76b, and 76c.

[0055] The coil wire 7a wound around the tooth 4a has a first-layer rising portion 76a that rises at 42 layers of the long side portion of the tooth 4a. The coil wire 7b wound around the tooth 4b has a first-layer rising portion 76b that rises at 42 layers of the long side portion of the tooth 4b. The coil wire 7c wound around the tooth 4c has a first-layer rising portion 76c that rises at 42 layers of the long side portion of the tooth 4c. The first-layer rising portion 76a is arranged in the groove 5a formed between the adjacent teeth 4a and 4d. The first-layer rising portion 76b is arranged in the groove 5b formed between the adjacent teeth 4a and 4b. The first-layer rising portion 76c is arranged in the groove 5c formed between the adjacent teeth 4b and 4c. In the present embodiment, one first-layer rising portion 76 is arranged for each slot 5.

[0056] In the present embodiment, one first layer rising portion 76 is arranged for each slot 5. That is, one coil wire 7 is layer-rising in the long side portion 42 for each slot 5. Therefore, the contact of the coil wire 7 wound around the adjacent teeth 4 can be suppressed, and the coil duty ratio and insulation resistance can be improved. In addition, in the present embodiment, the layer rising of the coil wires 7a, 7b, and 7c is performed in the long side portion 42 in the last turn, but the layer rising of the coil wires 7a, 7b, and 7c can also be performed in the long side portion 42 except for the last turn.

[0057] Implementation method 5.

[0058] Fig.10 This is a cross-sectional view of the stator 1 according to the fifth embodiment cut along a direction perpendicular to the central axis C. Fig.10 This is a cross-sectional view of the stator 1 as viewed from the connection side. Fig.10 In the embodiment 5, for the sake of convenience, the first layer rising portion 76b is not shown in cross section. In the embodiment 5, the same reference numerals are given to the parts that overlap with those in the above-mentioned embodiment 1, and the description thereof is omitted.

[0059] In the stator 1, the first slot 5A and the second slot 5B are formed alternately in the circumferential direction. The first layer rising portion 76a of the coil wire 7a is arranged in the first slot 5A. The first layer rising portion 76a is provided in the portion of the coil wire 7a extending from the opposite side to the connection side. The first layer rising portion 76b of the coil wire 7b is arranged in the second slot 5B. The first layer rising portion 76b is provided in the portion of the coil wire 7b extending from the connection side to the opposite side to the connection.

[0060] In the present embodiment, the slots 5a for configuring the first layer rising portion 76a provided in the portion extending from the opposite side of the connection to the connection side in the coil wire 7a and the slots 5b for configuring the first layer rising portion 76b provided in the portion extending from the connection side to the opposite side of the connection in the coil wire 7b are alternately arranged in the circumferential direction. As a result, the number of turns of the coil 10 in each slot 5 becomes equal, so that the torque pulsation and electromagnetic excitation force caused by the uneven number of turns of the coil 10 can be reduced. In addition, in the present embodiment, the layer rising of the coil wire 7a is performed in the long side portion 42 in the first slot 5A at the last turn, and the layer rising of the coil wire 7b is performed in the long side portion 42 in the second slot 5B at the last turn, but the layer rising of the coil wires 7a and 7b can also be performed in the long side portion 42 other than the last turn.

[0061] Implementation method 6.

[0062] Fig.11 This is a diagram of a core base 3 , teeth 4 , and coil wires 7 included in a stator 1 according to the sixth embodiment, as viewed along a central axis C. FIG. Fig.11 This is a diagram showing the teeth 4 and the like as viewed from the connection side. Fig.11 In the figure, for convenience of explanation, two teeth 4 are shown. In the sixth embodiment, the same reference numerals are given to the parts that overlap with those in the first embodiment, and the explanation thereof is omitted.

[0063] All the second-layer rising portions 77 are arranged on one side of the stator 1 along the central axis C. In the present embodiment, all the second-layer rising portions 77 are arranged on one end of the stator 1 along the central axis C, but may be arranged on the other end of the stator 1 along the central axis C.

[0064] In the present embodiment, all the second-layer rising portions 77 are arranged on one side of the stator 1 along the central axis C. Thus, compared with the case where the second-layer rising portions 77 are arranged on both sides of the stator 1 along the central axis C, the second-layer rising portions 77 can suppress the size of the coil end portion on the opposite side along the central axis C. Therefore, the increase in the size of the motor 100 along the central axis C can be suppressed.

[0065] Implementation method 7.

[0066] Fig.12 This is a cross-sectional view obtained by cutting the core base 3 , the teeth 4 , the coil wire 7 , and the guide portion 11 included in the stator 1 according to the seventh embodiment in a direction perpendicular to the central axis C. FIG. Fig.12 This is a cross-sectional view of the tooth 4 and the like as viewed from the connection side. Fig.12 In the figure, for convenience of explanation, three teeth 4 are shown. In the seventh embodiment, the same reference numerals are given to the parts that overlap with those in the first embodiment, and the explanation thereof is omitted.

[0067] A guide portion 11 is provided on one tooth 4a of two teeth 4a and 4b around which the coil wire 7 is continuously wound. The guide portion 11 is arranged on the long side portion 42 of the tooth 4a that faces the other tooth 4b. The guide portion 11 has the function of shifting the coil wire 7 wound on the winding portion 41 radially inward by one row. The guide portion 11 may be formed integrally with an insulator (not shown) that covers the surface of the tooth 4a, or may be a component that is separate from the insulator. The winding start portion 73 of the coil wire 7 is arranged on the long side portion 42 of the tooth 4a that is opposite to the guide portion 11. The guide portion 11 and the winding start portion 73 are arranged at symmetrical positions across the winding portion 41.

[0068] The other tooth 4b is not provided with the guide portion 11. The winding end portion 74 of the coil wire 7 in the other tooth 4b is arranged toward the long side 42 of one tooth 4a. The teeth 4a provided with the guide portion 11 and the teeth 4b not provided with the guide portion 11 are alternately arranged in the circumferential direction of the stator 1.

[0069] Next, refer to Fig.13 and Fig.14 The process of winding the coil wire 7 will be described. Fig.13 It is an explanatory diagram for explaining a winding process of the coil wire 7 according to the seventh embodiment, and is a diagram schematically showing a state where two adjacent teeth 4a and 4b are viewed from the connection side. Fig.14 This is an explanatory diagram for explaining the winding process of the coil wire 7 involved in the seventh embodiment, and is a diagram schematically showing the state of two adjacent teeth 4a and 4b observed from the opposite side of the connection. In the following, in one tooth 4a, the long side 42 configured for the winding start portion 73 of the coil wire 7 is referred to as the long side 42a, and the long side 42 provided for the guide portion 11 is referred to as the long side 42b. In addition, in one tooth 4a, the short side 43 on the connection side is referred to as the short side 43a, and the short side 43 on the opposite side of the connection is referred to as the short side 43b. In addition, in another tooth 4b, the long side 42 configured for the winding end portion 74 of the coil wire 7 is referred to as the long side 42c, and the long side 42 on the opposite side of the long side 42c is referred to as the long side 42d. In the other tooth 4 b , the short side portion 43 on the connection side is referred to as a short side portion 43 c , and the short side portion 43 on the opposite side to the connection side is referred to as a short side portion 43 d .

[0070] In the winding process, first, the coil wire 7 of the first layer is wound around the tooth 4a. The coil wire 7 of the first layer is wound around the long side 42a of the tooth 4a from the connection side toward the opposite connection side. When the coil wire 7 is wound around the first column of the first layer, the coil wire 7 is offset radially inward by the guide portion 11. The coil wire 7 is offset radially inward, so that the coil wire 7 is obliquely wound around the short side 43b, but is wound in a full row around the long side 42a, the long side 42b, and the short side 43a. The coil wire 7 of the second column and thereafter guides the already wound coil wire 7 and is wound in sequence. In addition, although not shown in the figure, the coil wire 7 of the second layer and thereafter is also wound in sequence on the already wound coil wire 7. In the last turn, as shown in FIG. Fig.13 and Fig.14 As shown in the reference numeral a, the coil wire 7 is wound around the long side 42a of the tooth 4a from the connection side toward the opposite connection side, and as shown in the reference numeral a Fig.14 As shown by the reference numerals a and b, the layer is raised while the coil wire 7 is moved in the radial direction.

[0071] Next, if Fig.14 As shown in FIG. 1 , the coil wire 7 is bridged from the long side 42a of the tooth 4a toward the long side 42c of the tooth 4b on the opposite side of the connection. That is, the bridge wire 75 is extended from the long side 42a toward the long side 42c. Next, as shown in FIG. Fig.13 and Fig.14 As shown, the coil wire 7 of the first layer is wound around the tooth 4b. The coil wire 7 of the first layer is wound around the long side 42c of the tooth 4b from the opposite side to the wiring side toward the wiring side. When the coil wire 7 is wound around the first column of the first layer, the coil wire 7 wound around the short side 43d is offset radially inward by the coil wire 7 already wound around the long side 42c, but the coil wire 7 wound around the long side 42c, the long side 42d, and the short side 43c is wound in a full column. The coil wire 7 of the second column and thereafter guides the already wound coil wire 7 and is wound sequentially. In addition, although not shown in the figure, the coil wire 7 of the second layer and thereafter is also wound sequentially on the already wound coil wire 7. In the last turn, as shown in FIG. Fig.13 and Fig.14 As shown in the reference numeral d, the coil wire 7 is wound around the long side 42c of the tooth 4b from the opposite side to the connection side, and as shown in Fig.14 As shown by the reference numerals c and d, the coil wire 7 is moved in the radial direction while being layered. As described above, the coil wire 7 is continuously wound around two adjacent teeth 4a and 4b.

[0072] In the present embodiment, the coil wire 7 is wound in a row in the short side portions 43a and 43c, so when all the second layer rising portions 77 are arranged on one side along the central axis C of the stator 1, that is, when all the second layer rising portions 77 are arranged in the short side portions 43a and 43c, it is easy to wind the coil wire 7 around the teeth 4. Therefore, the manufacturing device for winding the coil wire 7 around the teeth 4 can be simplified.

[0073] The structure shown in the above embodiment is just an example, and it is possible to combine with other well-known technologies, and it is possible to combine the embodiments with each other. It is also possible to omit or change a part of the structure without departing from the scope of the gist.

[0074] Description of the label

[0075] 1 stator, 2 stator core, 3 core seat, 4, 4a, 4b, 4c, 4d teeth, 5, 5a, 5b, 5c slots, 5A first slot, 5B second slot, 6A first insulator, 6B second insulator, 7, 7a, 7b, 7c, 7d coil wire, 8 lead wire, 9 terminal, 10 coil, 11 guide portion, 12 rotor, 13 frame, 41 winding portion, 42, 42a, 42b, 42c, 42d long side portion, 43, 43a, 43b, 43c, 43d short side portion, 61 first outer peripheral wall, 61 a the first cavity, 61b the second cavity, 61c the third cavity, 62 the first inner circumferential wall, 63 the first connecting part, 64 the second outer circumferential wall, 65 the second inner circumferential wall, 66 the second connecting part, 71 the core wire, 72 the insulating coating part, 73 the winding starting part, 74 the winding ending part, 75 the jumper wire, 76, 76a, 76b, 76c the first layer rising part, 77 the second layer rising part, 81 the conductive wire, 82 the insulating coating part, 91 the side wall, 92 the bottom wall, 93 the first slit, 94 the second slit, 100 the motor, C the center axis.

Claims

1. A stator comprising a ring-shaped core seat formed of a magnet, a plurality of teeth protruding radially inward from the core seat, and slots formed between adjacent teeth, The stator is characterized by having: a first insulator disposed at one end of the stator along the central axis of the core base; a second insulator disposed at the other end of the stator along the central axis; a coil wire continuously wound around every two adjacent teeth; and a conductive terminal fixed to the first insulator to hold the coil wire; The coil wire includes a jumper wire extending from one of two adjacent teeth toward the other. The first insulator is formed with a cavity for inserting the connection terminal. The jumper wire is arranged on the second insulator. The tooth has a winding portion for winding the coil wire. The winding portion is formed into a rectangular parallelepiped whose length along the central axis is longer than its length in the circumferential direction, and has two long sides extending along the central axis and two short sides shorter than the long sides and extending in the circumferential direction. When one end of the stator where the connection terminal is arranged is set as the connection side, and the other end of the stator and the opposite side to the connection terminal is set as the opposite connection side, One of the two adjacent teeth is provided with a winding start portion of the coil wire extending from the connection side to the opposite connection side along one of the long sides and a guide portion for shifting the coil wire extending and wound along the other of the long sides radially inward. The cross-sectional shape of the guide portion cut in a direction perpendicular to the central axis is a polygon. The other of the two adjacent teeth is provided with a winding end portion of the coil wire extending from the opposite side to the connection side along one of the long sides, The teeth provided with the guide portion on the other long side and the teeth not provided with the guide portion are alternately arranged in the circumferential direction. A portion of each of the teeth arranged at the short side of the coil wire on the connection side extends along an extending direction of the short side. A portion of each of the teeth that is arranged on the short side of the coil wire on the opposite side of the connection line extends obliquely with respect to the extending direction of the short side.

2. The stator according to claim 1, characterized in that: A winding start portion of the coil wire is arranged radially outward of a radial center of the tooth.

3. The stator according to claim 1 or 2, characterized in that: The jumper wire is arranged radially outward relative to the radial center of the second insulator.

4. The stator according to claim 1, characterized in that: The coil wire has a first-layer rising portion which is a winding end portion of the coil wire in each of the teeth and is located at the uppermost layer in the long side portion, and a second-layer rising portion which rises from the lower layer to the upper layer in the short side portion.

5. The stator according to claim 4, characterized in that: One of the first-layer rising portions is disposed for each of the grooves.

6. The stator according to claim 4 or 5, characterized in that: The grooves for configuring the first layer rising portion provided on the portion of the coil wire extending from the connection side to the opposite connection side, and the grooves for configuring the first layer rising portion provided on the portion of the coil wire extending from the opposite connection side to the connection side, are alternately arranged in the circumferential direction.

7. The stator according to claim 4 or 5, characterized in that: All of the second-stage rising portions are arranged on one side of the stator along the central axis.

8. The stator according to claim 6, characterized in that: All of the second-stage rising portions are arranged on one side of the stator along the central axis.

9. An electric motor, characterized in that: have: The stator according to any one of claims 1 to 8; and The rotor is arranged with a gap between it and the stator.

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