Armature and rotating electric machine

Abstract

To alleviate stress generated in a connection part between a coil and a terminal.SOLUTION: A stator 14 includes: a stator core 20; an insulator 22; and a plurality of coils 26 that are formed by winding a conductive winding wire 24 around a plurality of teeth parts 34. The stator 14 includes terminals (a first terminal 28 and a second terminal 30). The terminal includes a caulking part 66 that is arranged between the pair of coils 26 adjacent in a circumferential direction and to which terminals (a first terminal 50A and a second terminal 50B) of the coil 26 are fixed. The terminal of the coil 26 includes: a first part 68; and a second part 70 that extends to a side opposite to an annular part 32 of the stator 14 from the first part 68 and is connected to the caulking part 66. In a boundary part between the first part 68 and the second part 70, a slack part 72 bent or curved to the second part 70 from the first part 68 is formed.SELECTED DRAWING: Figure 4

Description

[Technical Field]

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

[0002] Patent Document 1 listed 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. These coils extend circumferentially around the stator core and have connecting 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 connecting portion from the radial direction of the stator core. This eliminates the need to pull out the ends of each coil so that they extend axially around 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] Incidentally, although the configuration described in Patent Document 1 is useful from the viewpoint of miniaturizing the stator in the axial direction, there is room for improvement in terms of alleviating the stress that occurs in the portion of the coil that is connected to the terminal (conductive member).

[0005] In consideration of the above, an object of the present disclosure is to provide an armature and a rotating electric machine that can alleviate stress that occurs in the portion of the coil that is connected to the terminal. [Means for solving the problem]

[0006] The armature (14) that solves the above problem includes a stator 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 direction side and are arranged at intervals in the circumferential direction, a plurality of coils (26) formed by winding a conductive winding (24) around each of the plurality of teeth, and a crimped portion (66) that is formed using a conductive member and is arranged between a pair of circumferentially adjacent coils. and terminal portions (50A, 50B) of the coil having: terminals (28, 30) extending circumferentially from the portion of the coil wound around the tooth portion; a first portion (68) drawn out in the circumferential direction from the portion of the coil wound around the tooth portion; a second portion (70) extending from the first portion toward the opposite side of the annular portion or toward the annular portion and connected to the crimped portion; and a slack portion (72) formed at the boundary between the first portion and the second portion and bent or curved from the first portion to the second portion. The rotating electric machine (10) also includes one of a stator (14) and a rotor (12) configured including the armature, and the other of the stator and rotor having a magnet (18) arranged radially opposite the armature.

[0007] By configuring in this manner, it is possible to alleviate stress occurring at the connection portion between the coil and the terminal. [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. 10 is a side view of a second terminal of a motor according to a second embodiment, as viewed from the radially inner side. [Figure 11] FIG. 10 is an enlarged perspective view showing a portion of the stator where the first terminal is provided, illustrating a process in which the end portion of the coil is bent along a jig. [Figure 12] 10A and 10B are diagrams showing a schematic view of a movement locus of a portion that grips a winding. [Figure 13] 10 is an enlarged plan view showing a portion of the stator where the first terminal is provided, illustrating a process in which the terminal portion of the coil is bent along a jig. FIG. [Figure 14] FIG. 10 is an enlarged side view of a portion of the stator where the first terminal is provided, viewed from the inside in the radial direction, illustrating a process in which the end portion of the coil is bent along a jig. DETAILED DESCRIPTION OF THE INVENTION

[0009] A motor 10 according to a first embodiment of the present disclosure will be described using Figures 1 to 14. Note that the arrow Z direction, arrow R direction, and arrow C direction shown as appropriate in the figures respectively indicate one side in the rotational axis direction, the outer side in the rotational radial direction, and one side in the rotational circumferential direction of a rotor 12, which will be described later. Furthermore, hereinafter, when simply referring to an axial direction, a radial direction, or a circumferential direction, this refers to the rotational axis direction, rotational radial direction, or 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, 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. Furthermore, a first terminal fitting portion 44 is formed as a terminal fitting portion on each of the three first terminal support portions 42. The first terminal fitting portion 44 is formed in 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 winding wires 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, V-phase coils 26, and 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.

[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 formed by folding back the end opposite the base plate portion 62 toward the other circumferential side. The extension portion 64, together with the tip of the base plate portion 62, constitutes a crimping portion 66 that is open on the other circumferential side. 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 extending from the 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 extending 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 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. In a configuration in which the first portion 68 is pulled out from the radially inner end of the coil end 26A on one axial side toward the other circumferential side, the second portion 70 may be formed to extend from the other circumferential side of the first portion 68 toward the radially outer side (toward the annular portion 32 of the stator core 20). The slack portion 72 may also have a gently curved shape.

[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] Although the second terminal 30 described above has been configured such that the multiple press-fit portions 58 are provided in the end-side fixed portion 74B and the central fixed portion 74A is not provided with multiple press-fit portions 58, the present disclosure is not limited to this. For example, as in the second terminal 30 of the motor of the second embodiment shown in Fig. 10, the multiple press-fit portions 58 may be provided in the central fixed portion 74A and the multiple press-fit portions 58 may not be provided in the end-side fixed portion 74B.

[0039] 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.

[0040] 11, the first terminal portion 50A and the second terminal portion 50B described above are formed into a shape having a first portion 68, a second portion 70, and a loose portion 72 using a jig 78. Note that here, the process of forming the first terminal portion 50A using the jig 78 will be briefly described.

[0041] As shown in FIG. 11 , the jig 78 includes a jig body 78A formed in a generally cylindrical shape. The jig body 78A has a recess 78B formed therein to prevent contact with the extending portion 64 of the crimping piece 54. The jig 78 is disposed between a pair of circumferentially adjacent teeth 34, and the tip of a robot that feeds out the winding 24 passes around the jig 78, thereby forming the first terminal portion 50A into a shape including a first portion 68, a second portion 70, and a slack portion 72. In FIG. 12 , the trajectory of the tip of the robot that feeds out the winding 24 is indicated by circles and arrows K1 to K10. As shown in this figure, the tip of the robot moves from the radially outer end of the coil end 26A on one axial side to the other circumferential side along a trajectory indicated by K1 to K3. Next, the tip of the robot moves from position K3, which corresponds to the radially outer end of the crimping piece 54, to the radially inner side along a trajectory indicated by K4 to K9. Next, the tip of the robot moves from position K9 to one circumferential side along the locus K10. Here, as the tip of the robot moves from position K9 to one circumferential side along the locus K10, a part of the winding 24 is pressed against the outer peripheral surface of jig body 78A of jig 78, forming a part corresponding to slack portion 72. Also, as the tip of the robot moves from position K9 to one circumferential side along the locus K10, the part of the winding 24 corresponding to second portion 70 is positioned within crimped portion 66 from the open end side (the other circumferential side) of crimped portion 66. Then, crimped portion 66 is crimped (deformed), so that the part of the winding 24 corresponding to second portion 70 is connected to crimped portion 66. After crimping portion 66 is crimped, jig 78 is removed from between the pair of teeth 34. Through the above steps, the first terminal portion 50A is formed into a shape having the first portion 68, the second portion 70, and the loosened portion 72.

[0042] 11 and 12, an example has been described in which a jig 78 that is inserted between a pair of teeth 34 is used, but the present disclosure is not limited to this. For example, as shown in Figures 13 and 14, a jig 80 that is not inserted between a pair of teeth 34 may also be used.

[0043] (Actions and Effects of This Embodiment) Next, the operation and effects of this embodiment will be described.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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, the reliability of the motor 10 against vibration 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 in the end-side fixing portion 74B, but the central fixing portion 74A does not have multiple press-fitting portions 58. This effectively suppresses vibration at both circumferential ends of the second terminal 30 relative to the circumferential center. Note that the second terminal 30 of the motor of the second embodiment shown in FIG. 10 is configured such that the multiple press-fitting portions 58 are provided in the central fixing portion 74A, but the multiple press-fitting portions 58 are not provided in the end-side fixing portion 74B. This configuration effectively suppresses vibrations in the circumferential center portion of the second terminal 30. Whether to adopt the configuration of the second terminal 30 of the motor 10 of the first embodiment or the configuration of the second terminal 30 of the motor of the second embodiment can be determined appropriately taking into consideration the vibration frequency of the motor 10 and the natural frequency of the second terminal 30, etc. Note that the second terminal 30 may be configured such that, in addition to providing multiple press-fitting portions 58 in the end-side fixing portion 74B, multiple press-fitting portions 58 are also provided in the central fixing portion 74A.

[0048] Furthermore, in this embodiment, the press-fit portions 58 of the first terminal 28 and the second terminal 30 are disposed at the same circumferential positions as the teeth portions 34 of the stator core 20. That is, the press-fit portions 58 of the first terminal 28 and the second terminal 30 are disposed around high-rigidity portions of the stator core 20. This makes it possible to prevent the amplitude of vibration transmitted from the stator core 20 to the press-fit portions 58 from increasing.

[0049] 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.

[0050] In this embodiment, the crimped portion 66 of the first terminal 28 and the second terminal 30 is formed in a shape that is open on the side opposite to the coil 26 from which the first terminal portion 50A and the second terminal portion 50B are drawn (the other circumferential side). As a result, as shown in Figures 11 and 12, by moving the tip of the robot that feeds out the winding 24 from position K9 to one circumferential side along the locus K10, it is possible to position the portion of the winding 24 that corresponds to the second portion 70 within the crimped portion 66, and to form the first terminal portion 50A and the second terminal portion 50B into a shape that has the first portion 68, the second portion 70, and the slack portion 72.

[0051] 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.

[0052] 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.

[0053] While one embodiment of the present disclosure has been described above, the present disclosure is not limited to the above and can be implemented in various other modifications without departing from the spirit and scope of the present disclosure. For example, the configuration of the motor 10 may be applied to a generator. The configuration of the motor 10 may also be applied to an outer rotor brushless motor in which the rotor 12 is disposed radially outside the stator 14. The configuration of the present disclosure may also be applied to a rotor configured to include an armature having a similar configuration to the stator 14 of this embodiment. [Explanation of symbols]

[0054] 10 motor (rotating electric machine), 12 rotor (rotor), 14 stator (armature, stator), 18 magnet, 20 stator core, 24 winding, 26 coil, 26A coil end, 28 first terminal (terminal), 30 second terminal (terminal), 32 annular portion, 34 teeth portion, 50A first terminal portion (coil terminal portion), 50B second terminal portion (coil terminal portion), 54 crimping piece, 66 crimping portion, 68 first portion, 70 second portion, 72 loose portion

Claims

1. a stator 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 crimped portion (66) disposed between a pair of the coils adjacent in the circumferential direction; an end portion (50A, 50B) of the coil having a first portion (68) drawn out in the circumferential direction from a portion of the coil wound around the tooth portion, a second portion (70) extending from the first portion toward the opposite side of the annular portion or toward the annular portion and connected to the crimped portion, and a slack portion (72) formed at the boundary between the first portion and the second portion and bent or curved from the first portion to the second portion; Equipped with the first portion is drawn out in the circumferential direction from one of the coil ends on one axial side of the pair of circumferentially adjacent coils, The armature (14) has the first portion, the second portion, and the slack portion disposed between coil ends (26A) on one axial side of a pair of circumferentially adjacent coils.

2. The armature according to claim 1 , wherein the crimped portion is formed in a shape that is open on a side opposite to the coil from which the first portion is drawn out.

3. The terminal includes a crimping piece (54) extending from the annular portion toward the protruding direction of the teeth portion, and the crimping piece is formed on an end of the crimping piece opposite to the annular portion, 3. The armature according to claim 1, wherein the second portion is disposed along a surface of the crimping piece on one axial side.

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:

Images