Armature and rotating electric machine

Abstract

To prevent wear of a portion of winding led out from a coil.SOLUTION: A stator 14 comprises: a stator core 20; a plurality of coils 26; a second terminal 30 having a caulking part 66; a first lead-out wire 78; and a second lead-out wire 80. The first lead-out wire 78 is formed of a part of winding forming a specific coil 26(U1) of the plurality of coils 26, and has a second portion 70 routed from the specific coil 26(U1) to a side of the caulking part 66 and connected to the caulking part 66. The first lead-out wire 78 is formed of a part of winding forming the specific coil 26(U1), and is routed from the specific coil 26(U1) to the opposite side of the first lead-out wire 78 to be connected to another coil 26.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The present disclosure relates to an armature and a rotating electric machine. [Background technology]

[0002] Patent Document 1 below discloses a stator, which is an armature that constitutes part of a rotating electric machine. The stator described in this document includes a U-phase coil, a V-phase coil, and a W-phase coil formed by windings. These coils extend in the circumferential direction of the stator core and have connection portions where the U-phase conductive members, the V-phase conductive members, and the W-phase conductive members are connected. Each conductive member has a hook that clamps the connection portion from the radial direction of the stator core. This configuration eliminates the need to draw out coil ends from each coil so as to extend in the axial direction of the stator core, making it possible to reduce the axial size of the stator. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2021-151093 Summary of the Invention [Problem to be solved by the invention]

[0004] However, if the portions of the windings forming the coil that are drawn out from the coil come into contact with each other, it is conceivable that the windings will wear out at the contacting portions, but the configuration described in Patent Document 1 above does not take this into consideration.

[0005] In consideration of the above, an object of the present disclosure is to provide an armature and a rotating electric machine that can suppress wear of the portion of the winding that is drawn out from the coil. [Means for solving the problem]

[0006] The armature (14) that solves the above problem includes an armature core (20) having an annular portion (32) formed in an annular shape and a plurality of teeth (34) that protrude from the annular portion toward one radial side and are spaced apart in the circumferential direction; a plurality of coils (26) formed by winding a conductive winding (24) around each of the plurality of teeth; terminals (28, 30) formed using a conductive member and having a locking portion (66) that is arranged between a pair of circumferentially adjacent teeth; a first lead wire (78) formed from a part of the winding that forms a specific coil of the plurality of coils, routed from the specific coil to the locking portion and having a connecting portion (70) that is connected to the locking portion; and a second lead wire (80) formed from a part of the winding that forms the specific coil, routed from the specific coil to the opposite side from the first lead wire, and connecting the specific coil to the other coils. Also, an armature (14) that solves the above problem includes an armature core (20) having an annular portion (32) formed in an annular shape, and a plurality of teeth (34) that protrude from the annular portion toward one radial side and are arranged at intervals in the circumferential direction, a plurality of coils (26) formed by winding conductive windings around the plurality of teeth, respectively, terminals (28, 30) that are formed using a conductive member and have locking portions (66) that are arranged between a pair of circumferentially adjacent teeth, and a terminal (28, 30) that is formed by a portion of the winding that forms a specific coil of the plurality of coils, The armature core includes: a first lead wire (78) arranged from the specific coil toward the locking portion and having a connection portion (70) connected to the locking portion; a second lead wire (80) formed from a part of the winding that forms the specific coil, arranged from the specific coil toward the first lead wire, and connecting between the other coils; and an insulator (22) formed using an insulating material and attached to the armature core, having a lead wire contact portion (86) that abuts against at least one of the first lead wire and the second lead wire, thereby maintaining the first lead wire and the second lead wire separated from each other. In addition, a rotating electric machine (10) that solves the above problem includes one of a stator (14) and a rotor (12) that includes the armature, and the other of a stator and a rotor that has a magnet (18) arranged radially opposite the armature.

[0007] With this configuration, wear on the portion of the winding that is drawn out from the coil can be suppressed. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic view of a motor according to a first embodiment as viewed from the axial direction. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. 3 is an enlarged plan view showing a portion of the stator where a first terminal is provided. [Figure 5] 4 is an enlarged side view of a portion of the stator where a first terminal is provided, viewed from the radially inner side. FIG. [Figure 6] FIG. 2 is a perspective view showing the first terminal. [Figure 7] FIG. 7 is a perspective view of the first terminal as seen from a different direction from that shown in FIG. 6. [Figure 8] FIG. 2 is a perspective view showing the second terminal. [Figure 9] FIG. 4 is a side view of the second terminal as seen from the radially inner side. [Figure 10] FIG. 2 is an enlarged perspective view showing a part of the stator. [Figure 11] FIG. 11 is a schematic diagram showing a part of the stator shown in FIG. [Figure 12] FIG. 10 is a schematic diagram showing a part of a stator of a motor according to a second embodiment. [Figure 13] FIG. 10 is a schematic diagram showing a part of a stator of a motor according to a third embodiment. [Figure 14] FIG. 10 is a schematic diagram showing a part of a stator of a motor according to a fourth embodiment. [Figure 15] FIG. 10 is an enlarged perspective view showing a part of a stator of a motor according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] A motor 10 according to a first embodiment of the present disclosure will be described using FIGS. 1 to 11. Note that the arrow Z direction, arrow R direction, and arrow C direction, as appropriate, shown in the figures, respectively indicate one rotational axial direction side, the outer rotational radial direction side, and one rotational circumferential direction side of a rotor 12, which will be described later. The one axial direction side and the other axial direction side are directions defined for the sake of explanation, and the one axial direction side can also be the other axial direction side. Furthermore, the one circumferential direction side and the other circumferential direction side are directions defined for the sake of explanation, and the one circumferential direction side can also be the other circumferential direction side. Hereinafter, when simply referring to an axial direction, a radial direction, or a circumferential direction, this refers to the rotational axial direction, the rotational radial direction, or the rotational circumferential direction of the rotor 12, unless otherwise specified. Furthermore, the motor 10 of this embodiment and the motors of each embodiment described later are examples of rotating electric machines.

[0010] 1, the motor 10 of this embodiment is an inner rotor brushless motor. The motor 10 includes a stator 14 as an armature and a fixed element, and a rotor 12 as a rotor disposed radially inside the stator 14.

[0011] The rotor 12 includes a rotor core 16 fixed to a rotating shaft (not shown) and magnets 18 fixed to the radially outer surface of the rotor core 16. One example of the magnets 18 is a ring magnet formed in an annular shape. In this magnet 18, portions whose radially outer side is the north pole and portions whose radially outer side is the south pole are alternately arranged along the circumferential direction. Note that a configuration in which a plurality of magnets 18 are fixed to the radially outer surface of the rotor core 16 may also be used. In this configuration, magnets 18 whose radially outer side is the north pole and magnets 18 whose radially outer side is the south pole are alternately arranged along the circumferential direction.

[0012] 2, the stator 14 includes a stator core 20 as an armature core, an insulator 22 attached to the stator core 20, and a plurality of coils 26 formed by winding conductive windings 24 around the stator core 20. Also, as shown in FIGS. 2 and 3, the stator 14 includes three first terminals 28 and one second terminal 30 as terminals to which end portions of the coils 26 are connected.

[0013] The stator core 20 is a laminated core formed by laminating core constituent plates in the axial direction, the core constituent plates being formed by punching steel plates, which are soft magnetic materials, into a predetermined shape. The stator core 20 includes an annular portion 32 formed in an annular shape and a plurality of teeth 34 protruding radially inward from the annular portion 32. As shown in FIG. 3 , in this embodiment, 15 teeth 34 are arranged at equal intervals along the circumferential direction.

[0014] 2 and 3, the insulator 22 is made of an insulating resin material. The insulator 22 includes an annular covering portion 36 disposed along the radially inner surface of the annular portion 32 of the stator core 20.

[0015] The insulator 22 also includes a plurality of tooth covering portions 38 extending radially inward from the annular covering portion 36. The number of tooth covering portions 38 matches the number of teeth 34 of the stator core 20. Each tooth covering portion 38 covers the portion of each tooth 34 where a coil 26, described below, is formed.

[0016] The insulator 22 also has a flange portion 40 that protrudes axially from the radially inner end of the tooth covering portion 38 in the opposite direction to the teeth 34. The coil 26, which will be described later, is arranged around the tooth covering portion 38 and between the flange portion 40 and the annular covering portion 36. The insulator 22 of this embodiment has a structure divided into two parts in the axial direction.

[0017] As shown in FIG. 3 , the insulator 22 includes three first terminal support portions 42 that support three first terminals 28 (described later). The three first terminal support portions 42 are arranged along one axial end face of the annular portion 32 of the stator core 20. The one circumferential end of each first terminal support portion 42 is arranged at the same circumferential position as the tooth 34 on one circumferential side of a pair of circumferentially adjacent teeth 34. The other circumferential end of each first terminal support portion 42 is arranged at the same circumferential position as the tooth 34 on the other circumferential side of a pair of circumferentially adjacent teeth 34. Furthermore, the circumferential center of each first terminal support portion 42 is arranged at a circumferential position corresponding to the space between the pair of circumferentially adjacent teeth 34. In this embodiment, the three first terminal support portions 42 are arranged side by side in the circumferential direction at positions corresponding to the four circumferentially adjacent teeth 34. Each of the three first terminal support portions 42 has a first terminal fitting portion 44 formed therein as a terminal fitting portion. Each of the first terminal fitting portions 44 has a recessed shape that is open on one axial side.

[0018] The insulator 22 also includes a second terminal support portion 46 that supports a second terminal 30 (described later). The second terminal support portion 46 is disposed along one axial end face of the annular portion 32 of the stator core 20. In this embodiment, the second terminal support portion 46 is provided over an area corresponding to four circumferentially adjacent teeth 34. The second terminal support portion 46 is disposed on one circumferential side of the first terminal support portion 42 that is disposed furthest circumferentially of the three first terminal support portions 42. The second terminal support portion 46 is disposed circumferentially adjacent to the first terminal support portion 42 that is disposed furthest circumferentially of the three first terminal support portions 42. The second terminal support portion 46 also includes a second terminal fitting portion 48 that serves as a terminal fitting portion. The second terminal fitting portion 48 is formed in a recessed shape that is open on one axial side. The detailed configuration of the second terminal fitting portion 48 will be described in detail later.

[0019] The coils 26 are formed by windings 24, such as copper wire, around the teeth 34 of the stator core 20 via insulators 22. In this embodiment, five coils 26 constituting the U phase, five coils 26 constituting the V phase, and five coils 26 constituting the W phase are each formed around a predetermined tooth 34. The U-phase coils 26, the V-phase coils 26, and the W-phase coils 26 are arranged in this order along the circumferential direction. The five coils 26 constituting the U phase, the five coils 26 constituting the V phase, and the five coils 26 constituting the W phase are each connected in series. The five coils 26 constituting the U phase, the five coils 26 constituting the V phase, and the five coils 26 constituting the W phase are connected in a star connection.

[0020] Here, one end of the winding 24 forming the five U-phase coils 26 will be referred to as a U-phase first terminal portion 50A, which is a terminal portion of the coils 26. The other end of the winding 24 forming the five U-phase coils 26 will be referred to as a U-phase second terminal portion 50B, which is a terminal portion of the coils 26.

[0021] One end of the winding 24 forming the five V-phase coils 26 will be referred to as a V-phase first terminal portion 50A, which is a terminal portion of the coils 26. The other end of the winding 24 forming the five V-phase coils 26 will be referred to as a V-phase second terminal portion 50B, which is a terminal portion of the coils 26.

[0022] One end of the winding 24 forming the five W-phase coils 26 will be referred to as a W-phase first terminal portion 50A, which is a terminal portion of the coils 26. The other end of the winding 24 forming the five W-phase coils 26 will be referred to as a W-phase second terminal portion 50B, which is a terminal portion of the coils 26.

[0023] 3, 4, and 5, the U-phase first terminal portion 50A, the V-phase first terminal portion 50A, and the W-phase first terminal portion 50A are respectively connected to the three first terminals 28. Furthermore, the U-phase second terminal portion 50B, the V-phase second terminal portion 50B, and the W-phase second terminal portion 50B are connected to the second terminal 30.

[0024] 6 and 7, the first terminal 28 is formed by pressing a copper plate, which is a conductive material. The first terminal 28 includes a first insulator fixing portion 52, which serves as an insulator fixing portion and is formed in the shape of a rectangular plate with its thickness direction in the radial direction. The first terminal 28 also includes a crimping piece 54 that extends radially inward from the other axial end of the circumferential center of the first insulator fixing portion 52.

[0025] The first insulator fixing portion 52 includes a base plate portion 56 formed in a rectangular shape with the circumferential direction as the longitudinal direction and the axial direction as the transverse direction when viewed from the radial direction. The first insulator fixing portion 52 also includes a plurality of (two in this embodiment) press-fitting portions 58 that protrude toward one circumferential side from a portion on the other axial side at one circumferential end of the base plate portion 56. The first insulator fixing portion 52 also includes a plurality of (two in this embodiment) press-fitting portions 58 that protrude toward the other circumferential side from a portion on the other axial side at the other circumferential end of the base plate portion 56. The press-fitting portions 58 have a sawtooth shape when viewed from the radial direction. The first insulator fixing portion 52 also includes backlash-reducing projections 60 that protrude radially inward from portions on the other axial side at both circumferential end portions of the base plate portion 56.

[0026] The crimping piece 54 includes a base plate portion 62 formed in a rectangular shape with the radial direction as the longitudinal direction and the circumferential direction as the short side when viewed from the axial direction. The crimping piece 54 extends from one circumferential end of the radially inner end of the base plate portion 62 toward one circumferential side, and includes an extension portion 64 in which the end opposite the base plate portion 62 is folded back toward the other circumferential side. The extension portion 64, together with the tip of the base plate portion 62, constitutes a crimping portion 66 as a locking portion whose other circumferential side is open. As shown in FIGS. 4 and 5 , the first terminal portion 50A is clamped by the crimping portion 66, thereby connecting the first terminal portion 50A to the crimping portion 66.

[0027] 4, the first insulator fixing portion 52 of the first terminal 28 is inserted into the first terminal fitting portion 44 of the insulator 22. As a result, the first insulator fixing portion 52 is fixed to the insulator 22, and the first terminal 28 is supported by the insulator 22. Furthermore, with the first insulator fixing portion 52 inserted into the first terminal fitting portion 44, the multiple press-fit fitting portions 58 of the first insulator fixing portion 52 are press-fitted into the inner wall of the first terminal fitting portion 44. As a result, the first insulator fixing portion 52 remains fixed to the insulator 22. 4, 6, and 7, when the first insulator fixing portion 52 is fixed to the insulator 22, the multiple press-fit portions 58 on one circumferential side of the first insulator fixing portion 52 are arranged at the same circumferential positions as the tooth portions 34 on one circumferential side of a pair of circumferentially adjacent teeth 34. Similarly, the multiple press-fit portions 58 on the other circumferential side of the first insulator fixing portion 52 are arranged at the same circumferential positions as the tooth portions 34 on the other circumferential side of a pair of circumferentially adjacent teeth 34. Also, as shown in FIGS. 4 and 5, when the first insulator fixing portion 52 is fixed to the insulator 22, the crimping piece 54 is arranged at the center of the pair of circumferentially adjacent teeth 34. Furthermore, the base portion 62 of the crimping piece 54 is arranged between the coil ends 26A on one axial side of a pair of circumferentially adjacent coils 26.

[0028] 4, the first terminal portion 50A includes a first portion 68 that is routed from a radially outer end of the coil end 26A on one axial side toward the other circumferential side. The first terminal portion 50A also includes a second portion 70 that serves as a connecting portion and that is routed from the other circumferential side of the first portion 68 toward the radially inner side (the side opposite the annular portion 32 of the stator core 20). A slack portion 72 that is bent in an L shape from the first portion 68 to the second portion 70 is formed at the boundary between the first portion 68 and the second portion 70 in the first terminal portion 50A. The second portion 70 of the first terminal portion 50A described above is connected to the crimped portion 66 of the first terminal 28.

[0029] 4 and 5, when the second portion 70 of the first terminal portion 50A is connected to the crimped portion 66 of the first terminal 28, the second portion 70 of the first terminal portion 50A is disposed along one axially facing surface of the base portion 62 of the crimped piece 54. In addition, the first portion 68, the second portion 70, and the slack portion 72 of the first terminal portion 50A are disposed between the coil ends 26A on one axial side of a pair of circumferentially adjacent coils 26.

[0030] 8 and 9, the second terminal 30 is formed by pressing a copper plate, which is a conductive material, similarly to the first terminal 28. The second terminal 30 includes a second insulator fixing portion 74, which serves as an insulator fixing portion and is formed in a plate shape extending in the circumferential direction with the radial direction as its thickness direction.

[0031] Here, the central portion of the second insulator fixing portion 74 in the circumferential direction will be referred to as a central fixing portion 74A, and the portions on one and the other sides in the circumferential direction of the second insulator fixing portion 74 will be referred to as end-side fixing portions 74B.

[0032] The central fixing portion 74A is configured similarly to the first insulator fixing portion 52 of the first terminal 28 (see Figure 6), except that it does not have multiple press-fitting portions 58 and that connecting piece portions 76 extend from both circumferential sides on one axial side.

[0033] The end fixing portion 74B on one circumferential side has a configuration similar to the first insulator fixing portion 52 of the first terminal 28 (see FIG. 6), except that a connecting piece 76 extends from the end portion on one axial side and the other circumferential side. The connecting piece 76 of the end fixing portion 74B on one circumferential side is connected to the connecting piece 76 on one circumferential side of the central fixing portion 74A.

[0034] The end fixing portion 74B on the other circumferential side has a configuration similar to the first insulator fixing portion 52 of the first terminal 28 (see FIG. 6), except that a connecting piece 76 extends from an end portion on one axial side and one circumferential side. The connecting piece 76 of the end fixing portion 74B on the other circumferential side is connected to the connecting piece 76 on the other circumferential side of the central fixing portion 74A.

[0035] The same reference numerals as those of the first insulator fixing portion 52 are used to designate the portions of the central fixing portion 74A and the end fixing portion 74B that correspond to the first insulator fixing portion 52 of the first terminal 28.

[0036] The second terminal 30 also includes a central fixing portion 74A, a circumferentially one end fixing portion 74B, and three crimping pieces 54 extending radially inward from the other axial end of the other circumferentially one end fixing portion 74B. The three crimping pieces 54 are arranged at equal intervals along the circumferential direction. The three crimping pieces 54 of the second terminal 30 each have the same configuration as the crimping pieces 54 of the first terminal 28. The crimping pieces 54 of the second terminal 30 are denoted by the same reference numerals as the crimping pieces 54 of the first terminal 28. As shown in FIG. 3 , the second terminal portion 50B is clamped between the crimping portions 66 of the crimping pieces 54, thereby connecting the second terminal portion 50B to the crimping portions 66 of the crimping pieces 54.

[0037] 3 and 9, the second insulator fixing portion 74 of the second terminal 30 described above is inserted into the second terminal fitting portion 48 of the insulator 22. Here, as shown in FIG. 9, a central fitting recess 48A is formed in the circumferential center of the bottom of the second terminal fitting portion 48, into which the other axial end of the central fixing portion 74A is inserted. Also, an end-side fitting recess 48B is formed on one circumferential side of the bottom of the second terminal fitting portion 48, into which the other axial end of the end-side fixing portion 74B on one circumferential side is inserted. Furthermore, an end-side fitting recess 48B is formed on the other circumferential side of the bottom of the second terminal fitting portion 48, into which the other axial end of the end-side fixing portion 74B on the other circumferential side is inserted. When the second insulator fixing portion 74 of the second terminal 30 is inserted into the second terminal fitting portion 48 of the insulator 22, the other axial end of the central fixing portion 74A is disposed within the central fitting recess 48A. Furthermore, the other axial end of the end fixing portions 74B on one and the other circumferential sides is disposed within the respective end fitting recesses 48B. This secures the second insulator fixing portion 74 to the insulator 22, thereby supporting the second terminal 30 on the insulator 22. Furthermore, when the other axial end of the end fixing portions 74B on one and the other circumferential sides is disposed within the respective end fitting recesses 48B, the multiple press-fit fitting portions 58 are press-fitted into the inner walls of the end fitting recesses 48B. This maintains the second insulator fixing portion 74 fixed to the insulator 22. The press-fit portions 58 are arranged at the same circumferential positions as predetermined teeth 34, similar to the press-fit portions 58 of the first terminal 28. As shown in Fig. 3, the three crimping pieces 54 of the second terminal 30 are each arranged at the center of a pair of teeth 34 adjacent to each other in the circumferential direction.

[0038] 3, the second terminal portion 50B has the same configuration as the first terminal portion 50A. Note that the portions of the second terminal portion 50B corresponding to those of the first terminal portion 50A are denoted by the same reference numerals as those of the first terminal portion 50A. The second portions 70 of the second terminal portions 50B of each phase are connected to the three crimped portions 66 of the second terminal 30, respectively.

[0039] Next, a configuration for suppressing wear of the portion of the winding 24 that is drawn out from the coil 26 will be described.

[0040] 10 shows a portion of the stator 14 where the second terminal 30 is provided. Here, the coils 26 of each phase are numbered in order from the coil 26 arranged closest to the second terminal 30 to one side in the circumferential direction.

[0041] Specifically, the U-phase coil 26 that is closest to the second terminal 30 is numbered U1. The U-phase coil 26 that is arranged on one circumferential side of the coil 26 numbered U1 is numbered U2, the U-phase coil 26 that is arranged on one circumferential side of the coil 26 numbered U2 is numbered U3, the U-phase coil 26 that is arranged on one circumferential side of the coil 26 numbered U3 is numbered U4, and the U-phase coil 26 that is arranged on one circumferential side of the coil 26 numbered U4 is numbered U5. Similarly, the five V-phase coils 26 are numbered V1 to V5, and the five W-phase coils 26 are numbered W1 to W5.

[0042] Numbers will also be assigned to each tooth 34 of the stator core 20. Specifically, the tooth 34 around which the coil 26 numbered U1 is formed will be numbered U1, the tooth 34 around which the coil 26 numbered V1 will be numbered V1, and the tooth 34 around which the coil 26 numbered W1 will be numbered W1. Similarly, the remaining tooth 34 will be numbered U2 to U5, V2 to V5, and W2 to W5.

[0043] In the following description, when a coil 26 having a specific number is indicated, the number of the coil 26 may be added in parentheses to the end of the reference numeral 26 indicating the coil 26. In addition, in the following description, when a tooth portion 34 having a specific number is indicated, the number of the tooth portion 34 may be added in parentheses to the end of the reference numeral 34 indicating the tooth portion 34.

[0044] 10 and 11, a portion of the winding 24 forming the coil 26(U1) is a first lead wire 78 and a second lead wire 80 drawn out from the coil 26(U1). The first lead wire 78 and the second lead wire 80 drawn out from the coil 26(U1) are drawn out from between a pair of teeth 34(U1) and 34(V1) that are adjacent in the circumferential direction. Note that the first lead wire 78 shown by a solid line in FIG. 11 indicates the first lead wire 78 drawn out to one axial side, and the first lead wire 78 shown by a dashed line in FIG. 11 indicates the first lead wire 78 routed along a predetermined path.

[0045] The first lead wire 78 drawn out from the coil 26(U1) is the aforementioned second terminal portion 50B. The second portion 70 of this second terminal portion 50B is connected to the crimped portion 66 of the second terminal 30 disposed between the pair of teeth 34(W5) and 34(U1) (between the pair of coils 26(W5) and 26(U1)).

[0046] The second lead wire 80 drawn out from the coil 26(U1) constitutes a portion that connects the coil 26(U1) and the coil 26(U2). This second lead wire 80 has an inclined portion 82 that is routed so as to incline toward the other axial side as it extends from the radially outer portion of the coil end 26A on one axial side toward one circumferential side. This inclined portion 82 is routed along the radially inner surface of the annular covering portion 36 of the insulator 22 between the coil 26(U1) and the coil 26(V1) (between the tooth portion 34(U1) and the tooth portion 34(V1)).

[0047] 11, the second lead wire 80 has an outer routing portion 84 that is routed from an end of the inclined portion 82 opposite the coil 26 (U1) toward one circumferential side. As shown in FIGS. 10 and 11, the outer routing portion 84 is routed radially outward from the annular covering portion 36 along the end portion on the other axial side of the insulator 22. Note that the routing path of the second lead wire 80 is not limited to the above, and other routing paths may be used, such as routing a portion corresponding to the outer routing portion 84 along the end portion on one axial side of the insulator 22.

[0048] 10, like the part of the winding 24 that forms the coil 26(U1), a part of the winding 24 that forms the coil 26(V1) is a first lead wire 78 and a second lead wire 80 that are led out from the coil 26(V1). The first lead wire 78 and the second lead wire 80 that are led out from the coil 26(V1) are led out from between a pair of teeth 34(V1) and teeth 34(W1) that are adjacent in the circumferential direction.

[0049] The first lead wire 78 drawn out from the coil 26(V1) is the aforementioned second terminal portion 50B. The second portion 70 of this second terminal portion 50B is connected to the crimped portion 66 of the second terminal 30 disposed between the pair of teeth 34(U1) and 34(V1) (between the pair of coils 26(U1) and 26(V1)).

[0050] The second lead wire 80 drawn out from the coil 26(V1) constitutes a portion that connects the coil 26(V1) and the coil 26(V2). This second lead wire 80 has an inclined portion 82 and the like, similar to the second lead wire 80 drawn out from the coil 26(U1). The inclined portion 82 of the second lead wire 80 drawn out from the coil 26(V1) is routed along the radially inner surface of the annular covering portion 36 of the insulator 22 between the coil 26(V1) and the coil 26(W1) (between the tooth portion 34(V1) and the tooth portion 34(W1)).

[0051] Like the part of the winding 24 that forms the coil 26(U1), a part of the winding 24 that forms the coil 26(W1) is a first lead wire 78 and a second lead wire 80 that are drawn out from the coil 26(W1). The first lead wire 78 and the second lead wire 80 that are drawn out from the coil 26(W1) are drawn out from between a pair of teeth 34(W1) and teeth 34(U2) that are adjacent in the circumferential direction.

[0052] The first lead wire 78 drawn out from the coil 26(W1) is the aforementioned second terminal portion 50B. The second portion 70 of this second terminal portion 50B is connected to the crimped portion 66 of the second terminal 30 disposed between the pair of teeth 34(V1) and 34(W1) (between the pair of coils 26(V1) and 26(W1)).

[0053] The second lead wire 80 drawn out from the coil 26(W1) constitutes a portion that connects the coil 26(W1) and the coil 26(W2). This second lead wire 80 has an inclined portion 82 and the like, similar to the second lead wire 80 drawn out from the coil 26(U1). The inclined portion 82 of the second lead wire 80 drawn out from the coil 26(W1) is routed along the radially inner surface of the annular covering portion 36 of the insulator 22 between the coil 26(W1) and the coil 26(U2) (between the tooth portion 34(W1) and the tooth portion 34(U2)).

[0054] Although detailed description will be omitted, first lead wires 78 and second lead wires 80 are also drawn out from the coil 26 (U5), coil 26 (V5), and coil 26 (W5). The first lead wires 78 and second lead wires 80 drawn out from each of these coils 26 (U5, V5, W5) correspond to the first lead wires 78 and second lead wires 80 drawn out from the coils 26 (U1, V1, W1) described above. The first terminal portions 50A, which are the first lead wires 78 drawn out from each of these coils 26 (U5, V5, W5), are connected to the crimped portions 66 of the respective first terminals 28. In addition, the inclined portions 82, which are part of the second lead wires 80 drawn out from each of these coils 26 (U5, V5, W5), are respectively arranged between coil 26 (U5) and coil 26 (V5), between coil 26 (V5) and coil 26 (W5), and between coil 26 (W5) and coil 26 (U1).

[0055] 10, the second terminal portion 50B of the first lead wire 78 drawn from the coil 26(U1) and the inclined portion 82 of the second lead wire 80 drawn from the coil 26(W5) are spaced apart in the axial direction between the two coils 26(U1, W5). Also, the second terminal portion 50B of the first lead wire 78 drawn from the coil 26(V1) and the inclined portion 82 of the second lead wire 80 drawn from the coil 26(U1) are spaced apart in the axial direction between the two coils 26(V1, U1). Also, the second terminal portion 50B of the first lead wire 78 drawn from the coil 26(W1) and the inclined portion 82 of the second lead wire 80 drawn from the coil 26(V1) are spaced apart in the axial direction between the two coils 26(W1, V1). Although detailed explanation is omitted, the first lead wire 78 drawn out from the coil 26 (U5, V5, W5) is also axially spaced apart from the inclined portion 82 of the second lead wire 80 arranged at a predetermined position, similar to the first lead wire 78 drawn out from the coil 26 (U1, V1, W1).

[0056] (Actions and Effects of This Embodiment) Next, the operation and effects of this embodiment will be described.

[0057] 1 to 3, in the motor 10 of this embodiment, the current flowing through the coils 26 of each phase is switched by switching the voltage applied to the three first terminals 28. This generates a rotating magnetic field around the stator 14, causing the rotor 12 to rotate.

[0058] 2 to 5, in this embodiment, the crimped portion 66 of the first terminal 28 and the crimped portion 66 of the second terminal 30 are configured to be disposed between a pair of circumferentially adjacent teeth 34 (coils 26). As a result, in this embodiment, the stator 14 can be made smaller in the axial direction than in a configuration in which the crimped portion 66 of the first terminal 28 and the crimped portion 66 of the second terminal 30 are disposed on one or the other axial side of the stator core 20.

[0059] 3, 4, 6, 7, 8, and 9, when the first insulator fastening portion 52 of the first terminal 28 is inserted into the first terminal fitting portion 44 of the insulator 22, the multiple press-fit fitting portions 58 of the first insulator fastening portion 52 are press-fit into the inner wall of the first terminal fitting portion 44. This makes it possible to prevent the first terminal 28 from shifting relative to the insulator 22 due to vibration of the motor 10. As a result, it is possible to ensure or improve reliability against vibration of the motor 10. In particular, by providing the multiple press-fit fitting portions 58 on both circumferential sides of the crimping piece 54, it is possible to suppress vibration of the crimping piece 54.

[0060] Furthermore, in this embodiment, when the second insulator fixing portion 74 of the second terminal 30 is inserted into the second terminal fitting portion 48 of the insulator 22, the multiple press-fitting portions 58 are press-fitted into the inner wall of the end-side fitting recess 48B. This prevents the second terminal 30 from shifting relative to the insulator 22 due to vibration of the motor 10. As a result, reliability against vibration of the motor 10 can be ensured or improved. In particular, the second terminal 30 of this embodiment is configured such that the multiple press-fitting portions 58 are provided on the end-side fixing portion 74B, but the central fixing portion 74A does not have multiple press-fitting portions 58. This effectively suppresses vibration of both circumferential ends of the second terminal 30 relative to the circumferential center portion.

[0061] 3, 4, and 5, in this embodiment, the first terminal portion 50A and the second terminal portion 50B of the coil 26 are configured to include a first portion 68, a second portion 70, and a slack portion 72. This allows the slack portion 72 to relieve tension generated in the first terminal portion 50A and the second terminal portion 50B. This allows stress generated in the connection portion between the coil 26 and the terminals (the first terminal 28 and the second terminal 30) to be relieved. As a result, breakage of the first terminal portion 50A and the second terminal portion 50B of the coil 26 can be suppressed.

[0062] 3 to 5, in this embodiment, the second portions 70 of the first terminal portion 50A and the second terminal portion 50B are disposed along one axial side surface of the base portion 62 of the crimping piece 54. This allows the base portion 62 of the crimping piece 54 to suppress displacement of the second portions 70 toward the other axial side when the motor 10 vibrates in the axial direction. This makes it possible to suppress torsional deformation of the first portion 68 caused by displacement of the second portions 70 in the axial direction.

[0063] Furthermore, in this embodiment, the first portion 68, the second portion 70, and the slack portion 72 of the first terminal portion 50A and the second terminal portion 50B are disposed between the coil ends 26A on one axial side of a pair of circumferentially adjacent coils 26. This makes it possible to prevent the lengths of the first terminal portion 50A and the second terminal portion 50B from increasing, compared to a configuration in which the first portion 68, the second portion 70, and the slack portion 72 of the first terminal portion 50A and the second terminal portion 50B are disposed away from the above-mentioned positions.

[0064] 10 and 11, in this embodiment, a first lead wire 78 and a second lead wire 80 are led out from the coil 26(U1). The first lead wire 78 and the second lead wire 80 led out from the coil 26(U1) are arranged in opposite circumferential directions. This prevents the first lead wire 78 and the second lead wire 80 led out from the coil 26(U1) from contacting each other. This prevents or reduces wear between the first lead wire 78 and the second lead wire 80 led out from the coil 26(U1) due to contact between them. Similarly, for the first lead wire 78 and the second lead wire 80 drawn out from each coil 26 (V1, W1, U5, V5, W5), wear of the first lead wire 78 and the second lead wire 80 drawn out from each coil 26 (V1, W1, U5, V5, W5) due to contact between them can be prevented or suppressed.

[0065] Furthermore, in this embodiment, the second portion 70 of the first lead wire 78 (first terminal portion 50A, second terminal portion 50B) is connected to the crimping portion 66 through which the first lead wire 78 and the second lead wire 80 are drawn out and which is located at a position different from the position between a pair of circumferentially adjacent teeth portions 34. With this configuration, it is possible to prevent or suppress wear between the first lead wire 78 and the second lead wire 80, which are drawn out from between a pair of circumferentially adjacent teeth portions 34, due to contact between them.

[0066] Furthermore, in this embodiment, the U-phase coil 26, the V-phase coil 26, and the W-phase coil 26 are arranged in this order along the circumferential direction. In addition, a first lead wire 78 drawn from a specific coil 26 of one phase and a second lead wire 80 drawn from a specific coil 26 of another phase are spaced apart in the axial direction between the specific coil 26 of one phase and the specific coil 26 of the other phase. With this configuration, it is possible to prevent or suppress wear between the first lead wire 78 and the second lead wire 80 drawn from the coils 26 of different phases due to contact between them.

[0067] In the present embodiment, an example has been described in which the first lead wires 78 and second lead wires 80 drawn from the coils 26 (U1, V1, W1) and the first lead wires 78 and second lead wires 80 drawn from the coils 26 (U5, V5, W5) are arranged in the same manner, but the present invention is not limited to this. For example, as in the stator of a motor according to a second embodiment shown in FIG. 12 , the routing direction of the first lead wires 78 and second lead wires 80 drawn from the coil 26 (U5) may be set in the opposite direction to that in the first embodiment. Although not shown in the drawings, in the motor according to the second embodiment, the routing direction of the first lead wires 78 and second lead wires 80 drawn from the coils 26 (V5, W5) is also set in the opposite direction to that in the first embodiment.

[0068] In the above-described example, the first lead wires 78 drawn from the coils 26 (U1, V1, W1, U5, V5, W5) are connected to the crimped portions 66 located adjacent to the coils 26 (U1, V1, W1, U5, V5, W5), respectively. However, the present invention is not limited to this. For example, as in the stator of a motor according to a third embodiment shown in FIG. 13, the first lead wire 78 drawn from the coil 26 (U1) may be connected to the crimped portion 66 located away from the coil 26 (U1). Although not shown in the drawings, in the motor according to the third embodiment, the first lead wires 78 drawn from the coils 26 (V1, W1, U5, V5, W5) are connected to the crimped portions 66 located away from the coils 26 (V1, W1, U5, V5, W5).

[0069] In the example described above, the first lead wire 78 and the second lead wire 80 drawn from a specific coil 26 are routed in opposite circumferential directions, but the present invention is not limited to this. For example, the motor may be configured as in the fourth embodiment described below.

[0070] As shown in Figures 14 and 15, in the motor of the fourth embodiment, the first lead wire 78 and the second lead wire 80 drawn out from the coil 26 (U1) are arranged in the same circumferential direction, that is, toward one circumferential side.

[0071] The first lead wire 78 drawn out from the coil 26(U1) includes a first portion 68 routed so as to incline toward one axial side as it extends from a radially outer portion of the coil end 26A on the other axial side toward one circumferential side, and a second portion 70 routed radially inward from the first portion 68. The second portion 70 of the first lead wire 78 is connected to a crimped portion 66 arranged between the pair of teeth 34(U1) and teeth 34(V1) (between the pair of coils 26(U1) and coils 26(V1)).

[0072] The second lead wire 80 drawn out from the coil 26(U1) has an inclined portion 82 that is arranged so as to incline toward the other axial side as it extends from the radially outer portion of the coil end 26A on one axial side toward one circumferential side. This inclined portion 82 is arranged so as to intersect with the first portion 68 of the first lead wire 78 drawn out from the coil 26(U1) when viewed from the radially inner side. In this embodiment, the inclined portion 82 is located radially inward of the first portion 68 of the first lead wire 78 drawn out from the coil 26(U1).

[0073] As shown in FIG. 15 , the insulator 22 has a lead wire contact portion 86 that protrudes radially inward from the annular covering portion 36 toward the inclined portion 82 of the second lead wire 80. The inclined portion 82 of the second lead wire 80 abuts against this lead wire contact portion 86. This keeps the inclined portion 82 of the second lead wire 80 and the first portion 68 of the first lead wire 78 separated from each other. As a result, wear between the first lead wire 78 and the second lead wire 80 due to contact between them can be prevented or suppressed. The first lead wire 78 and the second lead wire 80 led from the other coils 26 have the same configuration as the first lead wire 78 and the second lead wire 80 led from the coil 26(U1).

[0074] In the motor of the fourth embodiment described above, an example has been described in which the lead wire contact portion 86 is in contact with the second lead wire 80, but the present invention is not limited to this. Depending on the positional relationship between the first lead wire 78 and the second lead wire 80, the lead wire contact portion 86 may be in contact with the first lead wire 78. Furthermore, depending on the positional relationship between the first lead wire 78 and the second lead wire 80, a configuration may be adopted in which multiple lead wire contact portions 86 are in contact with the first lead wire 78 and the second lead wire 80, respectively.

[0075] The above describes one embodiment of the present disclosure, but the present disclosure is not limited to the above, and it goes without saying that it can be implemented in various other modified forms within the scope that does not deviate from the gist of the present disclosure. [Explanation of symbols]

[0076] 10 motor (rotating electric machine), 12 rotor (rotor), 14 stator (armature, stator), 18 magnet, 20 stator core (armature core), 22 insulator, 24 winding, 26 coil, 28 first terminal (terminal), 30 second terminal (terminal), 32 annular portion, 34 teeth portion, 66 crimped portion (locking portion), 70 second portion (wiring connection portion), 78 first lead wire, 80 second lead wire, 86 lead wire contact portion

Claims

1. an armature core (20) having an annular portion (32) formed in an annular shape and a plurality of teeth portions (34) protruding from the annular portion toward one radial side and arranged at intervals in a circumferential direction; a plurality of coils (26) formed by winding conductive windings (24) around the plurality of teeth, respectively; a terminal (28, 30) formed using a conductive material and having a locking portion (66) disposed between a pair of the teeth portions adjacent in the circumferential direction; a first lead wire (78) formed by a part of the winding that forms a specific coil among the plurality of coils, and arranged from the specific coil to the locking portion side, and having a connecting portion (70) connected to the locking portion; a second lead wire (80) formed by a part of the winding that forms the specific coil, and arranged on the opposite side of the first lead wire from the specific coil, connecting the specific coil to the other coils; Equipped with the first lead wire and the second lead wire are drawn out from between a pair of the teeth portions adjacent to each other in the circumferential direction, The connection portion of the first lead wire is connected to the locking portion, which is located at a position different from between the pair of teeth portions from which the first lead wire and the second lead wire are led out.

2. a plurality of coils for a plurality of phases; The specific coil of one phase is provided on one circumferential side of the locking portion, the specific coil of another phase is provided on the other circumferential side of the locking portion, the connection portion of the first lead wire drawn from the specific coil of one phase is locked to the locking portion arranged between the specific coil of one phase and the specific coil of another phase, 2. The armature according to claim 1, wherein the first lead wire drawn from the specific coil of one phase and the second lead wire drawn from the specific coil of the other phase are spaced apart in the axial direction between the specific coil of one phase and the specific coil of the other phase.

3. an armature core (20) having an annular portion (32) formed in an annular shape and a plurality of teeth portions (34) protruding from the annular portion toward one radial side and arranged at intervals in a circumferential direction; a plurality of coils (26) formed by winding conductive wires around the plurality of teeth, respectively; a terminal (28, 30) formed using a conductive material and having a locking portion (66) disposed between a pair of the teeth portions adjacent in the circumferential direction; a first lead wire (78) formed by a part of the winding that forms a specific coil among the plurality of coils, and arranged from the specific coil to the locking portion side, and having a connecting portion (70) connected to the locking portion; a second lead wire (80) formed by a part of the winding that forms the specific coil, and arranged from the specific coil to the first lead wire side, connecting the specific coil to the other coils; an insulator (22) formed using an insulating material and attached to the armature core, the insulator having a lead wire contact portion (86) with which at least one of the first lead wire and the second lead wire abuts, thereby maintaining the first lead wire and the second lead wire in a spaced-apart state; an armature (14) comprising:

4. One of a stator (14) and a rotor (12) configured to include the armature according to any one of claims 1 to 3; the other of the stator and the rotor having a magnet (18) arranged radially opposite the armature; A rotating electric machine (10) comprising:

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