Rotary electric machine

Abstract

A rotary electric machine according to one embodiment of the present invention comprises: a stator core having a teeth section; an insulator that surrounds the teeth section around an axial line extending in a first direction and passing through the teeth section, and that is elongated in a second direction orthogonal to the first direction as viewed in the first direction; and a coil part that is formed of an elastic coil wire and is wound around the insulator. The insulator has a first insulator part, a second insulator part opposite the first insulator part in the second direction, and protrusion parts protruding in the second direction. The protrusion parts include a first protrusion part that protrudes from one of the first and second insulator parts toward the other of the first and second insulator parts. The first protrusion part is deformable.

Description

Rotating electric machines

[0001] This application is based on Japanese Patent Application No. 2024-011080, filed on January 29, 2024. This application claims the benefit of priority to that application, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to a rotating electric machine.

[0003] There is known a stator in which an insulating bobbin, around which a coil is wound in advance, is attached to each of a plurality of magnetic poles of a stator core (for example, Japanese Patent Laid-Open Publication No. 2001-161039).

[0004] Japanese Patent Publication: JP 2001-161039 A

[0005] In the stator described above, the bobbin around which the coil is wound is subjected to a restoring force of the coil, which can cause the bobbin to deform in the circumferential direction when the bobbin is attached to the magnetic pole. If the bobbin deforms in the circumferential direction, the coil wound around the bobbin can come into contact with a bobbin or coil arranged adjacent to it in the circumferential direction when the bobbin is attached to the magnetic pole. In this case, it becomes difficult to attach the bobbin to the magnetic pole of the stator core, which can increase the number of steps required to assemble the stator.

[0006] In view of the above circumstances, an object of the present invention is to provide a rotating electric machine that can suppress an increase in the number of steps required for assembling a stator.

[0007] One aspect of the rotating electric machine of the present invention includes a stator core having teeth, an insulator extending in a first direction and surrounding the teeth around an axis passing through the teeth and elongated in a second direction perpendicular to the first direction as viewed from the first direction, and a coil formed of an elastic coil wire wound around the insulator. The insulator has a first insulator portion, a second insulator portion facing the first insulator portion in the second direction, and a protrusion protruding in the second direction. The protrusion includes a first protrusion protruding from either the first insulator portion or the second insulator portion toward the other of the first insulator portion or the second insulator portion. The first protrusion is deformable.

[0008] According to one aspect of the present invention, an increase in the number of steps required to assemble a stator in a rotating electric machine can be suppressed.

[0009] FIG. 1 is a cross-sectional view showing a rotating electric machine of the first embodiment. FIG. 2 is a perspective view showing a stator of the first embodiment. FIG. 3 is a cross-sectional view showing the rotating electric machine of the first embodiment, taken along III-III in FIG. 1 . FIG. 4 is a perspective view showing a part of the stator of the first embodiment. FIG. 5 is a perspective view showing an insulator of the first embodiment. FIG. 6 is a view of the insulator of the first embodiment as seen from the other side in the first direction. FIG. 7 is a flowchart showing an assembly process of the stator of the first embodiment. FIG. 8 is a first perspective view showing a winding process of the first embodiment. FIG. 9 is a second perspective view showing the winding process of the first embodiment. FIG. 10 is a view of the insulator in the mounting process of the first embodiment as seen from the other side in the first direction. FIG. 11 is a perspective view showing the mounting process of the first embodiment. FIG. 12 is a view of an insulator of a first modified example of the first embodiment as seen from the other side in the first direction. FIG. 13 is a perspective view showing an insulator of a second modified example of the first embodiment. Fig. 14 is a view of an insulator according to a second modification of the first embodiment as viewed from the other side in the first direction. Fig. 15 is a perspective view of the insulator according to the second embodiment. Fig. 16 is a perspective view of the insulator according to the second modification of the second embodiment.

[0010] The Z-axis direction shown appropriately in each drawing is the up-down direction with the positive side (+Z side) as the upper side and the negative side (-Z side) as the lower side. Note that the terms "upper side" and "lower side" are simply names used to describe the relative positional relationship of each part, and the actual positional relationship may be one other than the one indicated by these names.

[0011] The first direction D1 shown in each drawing as appropriate is the direction in which the teeth of the stator core protrude. In the following description, the side toward which the arrow of the first direction D1 points (the +D1 side) is referred to as "one side of the first direction D1," and the side opposite to the side toward which the arrow of the first direction D1 points (the -D1 side) is referred to as "the other side of the first direction D1." The second direction D2 shown in each drawing as appropriate is a direction perpendicular to the first direction D1. In the following description, the side toward which the arrow of the second direction D2 points (the +D2 side) is referred to as "one side of the second direction D2," and the side opposite to the side toward which the arrow of the second direction D2 points (the -D2 side) is referred to as "the other side of the second direction D2." The third direction D3 shown in each drawing as appropriate is a direction perpendicular to both the first direction D1 and the second direction D2. In the following description, the side toward which the arrow of the third direction D3 points (the +D3 side) will be referred to as "one side of the third direction D3," and the side opposite the side toward which the arrow of the third direction D3 points (the -D3 side) will be referred to as "the other side of the third direction D3."

[0012] The direction in which the central axis J, as shown appropriately in each drawing, extends is parallel to the Z-axis direction. In this embodiment, the central axis J is a virtual axis. The central axis J is the central axis of the shaft 23. In the following description, a direction parallel to the central axis J will be simply referred to as the "axial direction." A radial direction centered on the central axis J will be simply referred to as the "radial direction." A circumferential direction centered on the central axis J will be simply referred to as the "circumferential direction." In each drawing, the circumferential direction is indicated by an arrow θ. The side of the circumferential direction toward which the arrow θ points will be referred to as the "one circumferential side." The side of the circumferential direction opposite to the side toward which the arrow θ points will be referred to as the "other circumferential side." The one circumferential side is the side that advances clockwise around the central axis J (+θ side) when viewed from above. The other circumferential side is the side that advances counterclockwise around the central axis J (-θ side) when viewed from above.

[0013] First Embodiment The rotating electric machine 10 of this embodiment shown in FIG. 1 is a motor mounted on a device mounted on a vehicle. The device to which the rotating electric machine 10 is mounted may be an automatic transmission or a vehicle drive device that drives an axle of the vehicle. The rotating electric machine 10 of this embodiment is a radial gap motor in which the rotor 20 and the stator 30 are disposed radially opposite each other. In this embodiment, the first direction D1 is parallel to the radial direction. In this embodiment, one side of the first direction D1 (the +D1 side) is the radially inner side, and the other side of the first direction D1 (the −D1 side) is the radially outer side. In this embodiment, the second direction D2 is parallel to the axial direction. In this embodiment, one side of the second direction D2 (the +D2 side) is the upper side, and the other side of the second direction D2 (the −D2 side) is the lower side. In this embodiment, the third direction D3 is a direction perpendicular to both the axial direction and the radial direction. The rotating electric machine 10 may be an axial gap motor in which the rotor 20 and the stator 30 are arranged axially opposite to each other. In this case, the first direction D1 is parallel to the axial direction. The second direction D2 may be parallel to the radial direction or perpendicular to both the axial direction and the radial direction. The rotating electric machine 10 includes a housing 11, a rotor 20, a stator 30, a circuit board 80, a first bearing 16, and a second bearing 17.

[0014] The housing 11 accommodates various components of the rotating electrical machine 10, such as the rotor 20 and the stator 30. The housing 11 includes a cylindrical portion 12, an upper cover portion 13, a first bearing holder 14, and a stator holder 15.

[0015] The cylindrical portion 12 has a cylindrical shape that surrounds the central axis J. The cylindrical portion 12 has an opening 12d that opens to the upper side. The cylindrical portion 12 accommodates various components of the rotating electric machine 10, such as the rotor 20 and the stator 30. The cylindrical portion 12 has a peripheral wall portion 12a and a bottom wall portion 12b. The peripheral wall portion 12a has a generally cylindrical shape that extends axially with the central axis J as its center.

[0016] The bottom wall portion 12b is a substantially annular plate-like member centered on the central axis J. The radial outer edge of the bottom wall portion 12b is connected to the lower end of the peripheral wall portion 12a. The bottom wall portion 12b is provided with a second bearing retaining portion 12c and a bottom wall hole 12e. The second bearing retaining portion 12c protrudes upward from the bottom wall portion 12b. The second bearing retaining portion 12c is cylindrical and centered on the central axis J. The second bearing retaining portion 12c opens upward. A second bearing 17 is attached to the inner peripheral surface of the second bearing retaining portion 12c. The bottom wall hole 12e is a hole that penetrates the bottom wall portion 12b in the axial direction. When viewed in the axial direction, the bottom wall hole 12e is substantially circular and centered on the central axis J.

[0017] The upper cover portion 13 has a generally circular plate shape centered on the central axis J. The upper cover portion 13 is fixed to the upper end of the cylindrical portion 12. The upper cover portion 13 closes the opening 12d from above.

[0018] The first bearing holder 14 is substantially annular and centered on the central axis J. The first bearing holder 14 is disposed inside the cylindrical portion 12. The first bearing holder 14 is disposed above the rotor 20 and the stator 30. The radial outer edge of the first bearing holder 14 is fixed to the peripheral wall portion 12a. A first bearing 16 is attached to the inner peripheral surface of the first bearing holder 14. The first bearing holder 14 is provided with a plurality of substrate holders 14a. Each substrate holder 14a is columnar and protrudes upward from the first bearing holder 14. The substrate holders 14a are disposed at intervals from one another in the circumferential direction.

[0019] The stator holding portion 15 has a substantially circular ring shape centered on the central axis J. The stator holding portion 15 is disposed inside the cylindrical portion 12. The stator holding portion 15 is disposed below the rotor 20 and the stator 30. The radial outer edge of the stator holding portion 15 is fixed to the peripheral wall portion 12a. The stator holding portion 15 is provided with a plurality of holding holes 15a. Each holding hole 15a is a hole that penetrates the stator holding portion 15 in the axial direction. Although not shown, the stator holding portion 15 is provided with six holding holes 15a. The holding holes 15a are disposed at substantially equal intervals along the circumferential direction.

[0020] The rotor 20 is rotatable about a central axis J. In this embodiment, the rotor 20 is disposed radially inside the stator 30. The rotor 20 faces the stator 30 with a radial gap therebetween. The rotor 20 may also be disposed radially outside the stator 30. The rotor 20 includes a rotor core 21 and a shaft 23.

[0021] The rotor core 21 has a substantially circular ring shape centered on a central axis J. The rotor core 21 is rotatable about the central axis J. The rotor core 21 faces the stator 30 with a gap therebetween in the radial direction. A magnet (not shown) is fixed to the rotor core 21. The magnets are arranged at intervals in the circumferential direction.

[0022] The shaft 23 has a generally cylindrical shape extending in the axial direction around the central axis J. The shaft 23 is rotatable around the central axis J. The outer peripheral surface of the shaft 23 is fixed to the inner peripheral surface of the rotor 20. The upper end of the shaft 23 is supported by the first bearing 16 so as to be rotatable around the central axis J. The lower portion of the shaft 23 is supported by the second bearing 17 so as to be rotatable around the central axis J. The lower end of the shaft 23 passes axially through the bottom wall hole 12e and is located outside the housing 11.

[0023] The circuit board 80 is plate-shaped and extends in a direction perpendicular to the axial direction. The circuit board 80 is disposed inside the cylindrical portion 12. The circuit board 80 is disposed above the first bearing holder 14. The circuit board 80 is held by each board holder 14a. The circuit board 80 is electrically connected to an external power supply (not shown). Power is supplied to the circuit board 80 from the external power supply. Although not shown, the circuit board 80 is electrically connected to the stator 30. As a result, power from the external power supply is supplied to the stator 30 via the circuit board 80.

[0024] Each of the first bearing 16 and the second bearing 17 is annular and centered on the central axis J. The first bearing 16 supports the upper end of the shaft 23 rotatably about the central axis J. The second bearing 17 supports the lower portion of the shaft 23 rotatably about the central axis J. In this embodiment, each of the first bearing 16 and the second bearing 17 is a ball bearing. Each of the first bearing 16 and the second bearing 17 may be a sliding bearing.

[0025] The stator 30 is disposed radially outside the rotor 20. The stator 30 faces the rotor 20 with a radial gap therebetween. The stator 30 may also be disposed radially inside the rotor 20. In this embodiment, the stator 30 is fixed to the inner circumferential surface of the peripheral wall portion 12a. The stator 30 includes a stator core 31, a coil portion 38, and an insulator 40. That is, the rotating electric machine 10 includes the stator core 31, the coil portion 38, and the insulator 40.

[0026] The stator core 31 has an annular shape centered on the central axis J. The stator core 31 surrounds the rotor 20 from the radial outside. The stator core 31 faces the rotor 20 with a radial gap therebetween. As shown in FIG. 2 , the stator core 31 is composed of a first portion 31a, a second portion 31b, and a third portion 31c. The first portion 31a, the second portion 31b, and the third portion 31c are stacked in the axial direction. The first portion 31a is disposed above the second portion 31b, and the third portion 31c is disposed below the second portion 31b. The first portion 31a is fixed to the second portion 31b, and the third portion 31c is fixed to the second portion 31b. The stator core 31 may be integrally formed. As shown in FIG. 3 , the stator core 31 includes a core back portion 32, a plurality of teeth 33, and a plurality of fixing portions 34.

[0027] The core back portion 32 has an annular shape surrounding the central axis J. In the present embodiment, the core back portion 32 has an annular shape centered on the central axis J. Each tooth portion 33 protrudes radially from the core back portion 32, i.e., in the first direction D1. In the present embodiment, each tooth portion 33 protrudes radially inward from the core back portion 32. As shown in FIG. 4 , the tooth portions 33 protrude from the core back portion 32 to one side (+D1 side) in the first direction D1. Although not shown, in the present embodiment, the tooth portions 33 are provided in the second portion 31b. Therefore, the upper ends of the tooth portions 33 are located below the upper end of the core back portion 32, and the lower ends of the tooth portions 33 are located above the lower end of the core back portion 32. The axis Jt shown in FIG. 4 is a virtual axis line extending in the first direction D1 and passing through the tooth portions 33. As shown in FIG. 3 , each tooth portion 33 is disposed with a gap in the radial direction from the rotor core 21 .

[0028] In this embodiment, the stator core 31 has six teeth 33. The number of teeth 33 that the stator core 31 has may be five or less, or seven or more. The teeth 33 are arranged in the circumferential direction. In this embodiment, the teeth 33 are arranged at approximately equal intervals in the circumferential direction. The circumferential intervals between adjacent teeth 33 in the circumferential direction increase toward the radially outer side.

[0029] Each fixing portion 34 protrudes radially outward from the core back portion 32. As shown in FIG. 1, each fixing portion 34 is fixed to the inner circumferential surface of the peripheral wall portion 12a. This fixes the stator 30 to the housing 11. As shown in FIG. 3, the stator core 31 has six fixing portions 34. The number of fixing portions 34 included in the stator core 31 may be five or fewer, or seven or more. The fixing portions 34 are arranged at approximately equal intervals along the circumferential direction. Each fixing portion 34 has a fixing hole 34a. The fixing holes 34a are female-threaded holes that penetrate the fixing portion 34 in the axial direction. As shown in FIG. 1, when viewed from the axial direction, each fixing hole 34a overlaps with a different retaining hole 15a. When a screw 51 is axially passed through each retaining hole 15a and tightened into each fixing hole 34a, the stator core 31 is held by the stator retaining portion 15. This determines the circumferential position of the stator core 31 relative to the housing 11 .

[0030] As shown in FIG. 2 , the coil portions 38 are attached to the tooth portions 33 via insulators 40. The coil portions 38 are formed of elastic coil wire wound around the insulators 40. As shown in FIG. 4 , the coil portions 38 are formed of coil wire wound around the insulators 40 around the axis Jt. As shown in FIG. 2 , in this embodiment, the stator 30 has six coil portions 38. Each coil portion 38 is attached to a different tooth portion 33 via a different insulator 40. Each coil portion 38 is electrically connected to the circuit board 80 shown in FIG. 1 via a coil lead wire (not shown). Power from an external power source is supplied to each coil portion 38 via the circuit board 80.

[0031] As described above, the circumferential spacing between adjacent teeth 33 increases radially outward. In this embodiment, the number of turns of the coil wire wound around each insulator 40 increases radially outward. Therefore, as shown in FIG. 3 , when viewed from the axial direction, each coil 38 has a generally trapezoidal shape with its short side positioned radially inward and its long side positioned radially outward. This prevents contact between adjacent coils 38 in the circumferential direction, while allowing the number of turns of the coil 38 attached to each tooth 33 to be increased. Therefore, the output torque of the rotating electric machine 10 can be increased while preventing the stator 30 from becoming too large.

[0032] As shown in FIG. 2 , the insulator 40 is attached to the tooth portion 33. The insulator 40 includes a coil portion 38 wound with a coil wire. The insulator 40 is made of resin. The insulator 40 has insulating properties. The insulator 40 insulates the stator core 31 from the coil portion 38. As shown in FIG. 4 , the insulator 40 surrounds the tooth portion 33 around the axis Jt. The dimension of the insulator 40 in the second direction D2 is greater than the dimension in the third direction D3. Therefore, when viewed from the first direction D1, the insulator 40 is elongated in the second direction D2. As shown in FIG. 2 , the stator 30 includes multiple insulators 40. That is, the rotating electric machine 10 includes multiple insulators 40. In this embodiment, the stator 30 includes six insulators 40. The insulators 40 are arranged at approximately equal intervals along the circumferential direction. Each insulator 40 is attached to a different tooth portion 33. As shown in FIG. 5 , the insulator 40 has a first insulator portion 41, a second insulator portion 45, an insertion hole 40a, and a protrusion 40b. The first insulator portion 41 is the upper portion of the insulator 40. The second insulator portion 45 is the lower portion of the insulator 40. In this embodiment, the first insulator portion 41 and the second insulator portion 45 are different members. That is, the insulator 40 is composed of two members.

[0033] Therefore, according to this embodiment, compared to when the insulator 40 is an integral member, it is possible to simplify the configuration of the mold used when molding the insulator 40 by injection molding or the like, thereby suppressing increases in the manufacturing costs and manufacturing steps of the insulator 40.

[0034] As shown in Fig. 4, the first insulator portion 41 covers the upper portion of the tooth portion 33. As shown in Fig. 5, the first insulator portion 41 has a first coil holding portion 42, a first opposing portion 43, and a first flange portion 44. As shown in Fig. 6, the first insulator portion 41 has a first protrusion 41a.

[0035] The first coil holding portion 42 shown in FIG. 5 covers the upper portion of the tooth portion 33. The first coil holding portion 42 insulates the coil portion 38 from the tooth portion 33. The first coil holding portion 42 extends radially. When viewed radially, the first coil holding portion 42 has a generally U-shape that protrudes upward. As shown in FIG. 3, a coil wire is wound around the first coil holding portion 42. As shown in FIG. 5, a surface of the first coil holding portion 42 facing the other side (-D3 side) of the third direction D3 has multiple grooves 42a. Each groove 42a extends axially. The grooves 42a are arranged side by side in the radial direction. Although not shown, a surface of the first coil holding portion 42 facing one side (+D3 side) of the third direction D3 also has multiple grooves 42a. A portion of the coil portion 38 configured in the first coil holding portion 42 is disposed inside each groove 42a. Therefore, the coil portion 38 can be prevented from being displaced in the radial direction relative to the first coil holding portion 42 .

[0036] The first opposing portion 43 is connected to the radially inner end of the first coil holding portion 42. The first opposing portion 43 protrudes upward and to both sides in the circumferential direction from the first coil holding portion 42. As shown in FIG. 4, the first opposing portion 43 faces the coil portion 38 in the radial direction. This prevents the coil portion 38 from moving radially inward. As shown in FIG. 3, the first opposing portion 43 faces the rotor core 21 with a gap in the radial direction. As shown in FIG. 5, the first opposing portion 43 is provided with a hole 43a. The hole 43a is a hole that penetrates the first opposing portion 43 in the radial direction. The hole 43a is open to the downward side. The hole 43a is connected radially to the interior of the first coil holding portion 42.

[0037] The first flange portion 44 is connected to the radially outer end of the first coil holding portion 42. The first flange portion 44 protrudes upward and to both circumferential sides from the first coil holding portion 42. As shown in FIG. 4 , the first flange portion 44 faces the coil portion 38 in the radial direction. This allows the first flange portion 44 to insulate the coil portion 38 from the core back portion 32. The first flange portion 44 also prevents the coil portion 38 from moving radially outward. As shown in FIG. 6 , the first flange portion 44 has a substantially rectangular shape when viewed from the radial direction. The first flange portion 44 is provided with a hole 44a. The hole 44a is a hole that penetrates the first flange portion 44 in the radial direction. The hole 44a is open to the downward side. The hole 44a is connected radially to the interior of the first coil holding portion 42. As a result, the inside of the first coil holding portion 42, the hole portion 43a, and the hole portion 44a overlap in the radial direction.

[0038] In the present embodiment, the first convex portion 41a protrudes downward from the lower end of a portion of the first flange portion 44 on one side (+D3 side) in the third direction D3, i.e., toward the other side (-D2 side) in the second direction D2. The first convex portion 41a protrudes in the second direction D2. The first convex portion 41a protrudes from the first insulator portion 41 toward the second insulator portion 45. That is, the first convex portion 41a protrudes from either the first insulator portion 41 or the second insulator portion 45 toward the other of the first insulator portion 41 and the second insulator portion 45. The second insulator portion 45 may have the first convex portion 41a. In this case, the first convex portion 41a protrudes from the second insulator portion 45 toward the first insulator portion 41. The first convex portion 41a is provided on a radially outer portion of the first insulator portion 41. The first protrusion 41 a is provided on the radially outer portion of the insulator 40 .

[0039] In this embodiment, when viewed in the radial direction, the first convex portion 41a has a substantially semicircular shape with an arc portion protruding downward from the first flange portion 44. In this embodiment, when viewed in the radial direction, i.e., the first direction D1, the tip of the first convex portion 41a has an arc shape. Note that when viewed in the radial direction, the first convex portion 41a may have another shape, such as a triangular shape protruding downward from the first flange portion 44. In this case, when viewed in the first direction D1, the tip of the first convex portion 41a preferably has an obtuse interior angle. The dimension of the first convex portion 41a in the third direction D3 is smaller than the dimension of the first flange portion 44 in the third direction D3. Therefore, the rigidity of the first convex portion 41a is smaller than the rigidity of the first flange portion 44. This allows the first convex portion 41a to deform due to external forces. Furthermore, the axial rigidity of the first convex portion 41a is smaller than the axial rigidity of the first flange portion 44. As a result, the first convex portion 41 a can be deformed in the second direction D2 by an external force directed in the second direction D2. In the present embodiment, the first convex portion 41 a is elastically deformable in the second direction D2. The first convex portion 41 a is in contact with the second insulator portion 45 in the second direction D2. Note that the first convex portion 41 a may be plastically deformed by an external force.

[0040] As shown in FIG. 5 , the second insulator portion 45 faces the first insulator portion 41 in the axial direction, i.e., the second direction D2. As shown in FIG. 4 , the second insulator portion 45 covers the lower portion of the tooth portion 33. As shown in FIG. 5 , the second insulator portion 45 has a second coil holding portion 46, a second opposing portion 47, a second flange portion 48, and a second convex portion 45a. In this embodiment, the second insulator portion 45 and the first insulator portion 41 are identical in shape. The shape of the second insulator portion 45 is the same as the shape of the first insulator portion 41 rotated 180° around the axis Jt. Therefore, in this embodiment, a common mold can be used to mold the first insulator portion 41 and the second insulator portion 45 by injection molding or the like. This prevents increases in manufacturing costs and man-hours for the insulator 40.

[0041] The second coil holding portion 46 covers the lower portion of the tooth portion 33. The second coil holding portion 46 insulates the coil portion 38 from the tooth portion 33. The second coil holding portion 46 extends radially. When viewed radially, the second coil holding portion 46 has a generally U-shape that protrudes downward. A coil wire is wound around the second coil holding portion 46. A surface of the second coil holding portion 46 facing the other side (-D3 side) of the third direction D3 is provided with multiple grooves 46a. Each groove 46a extends axially. The grooves 46a are arranged side by side in the radial direction. Although not shown, a surface of the second coil holding portion 46 facing one side (+D3 side) of the third direction D3 also has multiple grooves 46a. A portion of the coil portion 38 formed in the second coil holding portion 46 is caught in each groove 46a. Therefore, the coil portion 38 can be prevented from being displaced in the radial direction relative to the second coil holding portion 46 .

[0042] The second opposing portion 47 is connected to the radially inner end of the second coil holding portion 46. The second opposing portion 47 protrudes downward and on both circumferential sides from the second coil holding portion 46. As shown in FIG. 4, the second opposing portion 47 faces the coil portion 38 in the radial direction. This prevents the coil portion 38 from moving radially inward. Although not shown, the second opposing portion 47 faces the rotor core 21 with a gap in the radial direction. As shown in FIG. 5, the second opposing portion 47 is provided with a hole 47a. The hole 47a is a hole that penetrates the second opposing portion 47 in the radial direction. The hole 47a is open to the upper side. The hole 47a is connected radially to the interior of the second coil holding portion 46.

[0043] The second flange portion 48 is connected to the radially outer end of the second coil holding portion 46. The second flange portion 48 protrudes downward and to both sides in the circumferential direction from the second coil holding portion 46. As shown in FIG. 4 , the second flange portion 48 faces the coil portion 38 in the radial direction. This allows the second flange portion 48 to insulate the coil portion 38 from the core back portion 32. The second flange portion 48 also prevents the coil portion 38 from moving radially outward. As shown in FIG. 6 , the second flange portion 48 has a substantially rectangular shape when viewed from the radial direction. The second flange portion 48 is provided with a hole 48a. The hole 48a is a hole that penetrates the second flange portion 48 in the radial direction. The hole 48a is open to the upper side. The hole 48a is connected radially to the interior of the second coil holding portion 46. As a result, the interior of the second coil holding portion 46, the hole 47a, and the hole 48a overlap in the radial direction.

[0044] In the present embodiment, the second convex portion 45a protrudes upward from the upper end of a portion of the second flange portion 48 on the other side (-D3 side) in the third direction D3 (i.e., toward one side (+D2 side) in the second direction D2). The second convex portion 45a protrudes in the second direction D2. The second convex portion 45a protrudes from the second insulator portion 45 toward the first insulator portion 41. That is, the second convex portion 45a protrudes from the other of the first insulator portion 41 and the second insulator portion 45 toward one of the first insulator portion 41 and the second insulator portion 45. The second convex portion 45a may be provided on the first insulator portion 41. The second convex portion 45a is provided on a radially outer portion of the second insulator portion 45. The second convex portion 45a is provided on a radially outer portion of the insulator 40.

[0045] In this embodiment, when viewed in the radial direction, the second convex portion 45a has a substantially semicircular shape with an arc portion protruding upward from the second flange portion 48. In this embodiment, when viewed in the radial direction, i.e., the first direction D1, the tip of the second convex portion 45a has an arc shape. The dimension of the second convex portion 45a in the third direction D3 is smaller than the dimension of the second flange portion 48 in the third direction D3. Therefore, the rigidity of the second convex portion 45a is smaller than the rigidity of the second flange portion 48. This allows the second convex portion 45a to be deformed by an external force. The second convex portion 45a can be deformed in the second direction D2 by an external force directed in the second direction D2. In this embodiment, the second convex portion 45a is elastically deformable in the second direction D2. The second convex portion 45a is in contact with the first insulator portion 41 in the second direction D2. The second protrusion 45a may be plastically deformed by an external force.

[0046] As shown in FIG. 5 , the insertion hole 40a is a hole that penetrates the insulator 40 in the radial direction. When viewed radially, the insertion hole 40a is a rectangular hole that is elongated in the axial direction, i.e., the second direction D2. In this embodiment, the insertion hole 40a is configured by the interior of the first coil holding portion 42, the interior of the second coil holding portion 46, hole portion 43a, hole portion 44a (see FIG. 6 ), hole portion 47a, and hole portion 48a (see FIG. 6 ). As shown in FIG. 4 , the tooth portion 33 is inserted radially into the insertion hole 40a. In this way, the insulator 40 is attached to the tooth portion 33.

[0047] In the present embodiment, the insulator 40 has a plurality of protruding portions 40b. As shown in FIG. 6 , the plurality of protruding portions 40b include a first protruding portion 41a and a second protruding portion 45a. As described above, each of the first protruding portion 41a and the second protruding portion 45a protrudes in the second direction D2. That is, each of the protruding portions 40b protrudes in the second direction D2. As described above, each of the first protruding portion 41a and the second protruding portion 45a is provided on a radially outer portion of the insulator 40. That is, each of the protruding portions 40b is provided on a radially outer portion of the insulator 40. As described above, when viewed from the first direction D1, the tip of each of the first protruding portion 41a and the tip of the second protruding portion 45a are arc-shaped. That is, when viewed from the first direction D1, the tip of each protruding portion 40b is arc-shaped or has an obtuse interior angle.

[0048] 7 is a flowchart showing the assembly process of the stator 30 of this embodiment. The assembly process of the stator 30 includes a winding process S01 in which a coil wire is wound around the insulator 40 to form the coil portion 38, and an attachment process S02 in which the insulator 40 with the coil portion 38 formed thereon is attached to the tooth portion 33. In the following description, the term "workers, etc." includes workers and assembly devices, etc., who perform the work in each process. The work in each process may be performed by workers alone, by an assembly device alone, or by both workers and the assembly device.

[0049] As shown in FIG. 8 , in the winding step S01, a worker first attaches the first insulator portion 41 and the second insulator portion 45 to an attachment jig 91 extending in the first direction D1. The first insulator portion 41 is attached to one side (+D2 side) of the attachment jig 91 in the second direction D2, and the second insulator portion 45 is attached to the other side (-D2 side) of the attachment jig 91 in the second direction D2. At this time, the attachment jig 91 is inserted into the insertion hole 40a of the insulator 40. When viewed from the first direction D1, the shape of the attachment jig 91 is substantially the same as the shape of the tooth portion 33. Therefore, the shape of the insertion hole 40a when viewed from the first direction D1 is substantially the same as the shape of the tooth portion 33 when viewed from the first direction D1. The worker may use a support jig (not shown) to support the first insulator portion 41 and the second insulator portion 45 so as to attach them to the attachment jig 91 .

[0050] Next, as shown in FIG. 9 , the worker winds the coil wire around the first coil holding portion 42 and the second coil holding portion 46 around the axis Jt along the outer periphery of the first coil holding portion 42 and the second coil holding portion 46. This completes the coil portion 38. As described above, the coil wire is elastic. Therefore, the coil portion 38 formed on the insulator 40 is elastically deformed. Note that, as described above, the number of turns of the coil wire wound around the insulator 40 increases radially outward. Therefore, when viewed from the second direction D2, the coil portion 38 has a generally trapezoidal shape with its short sides positioned radially inward and its long sides positioned radially outward. Furthermore, when viewed from the first direction D1, the coil portion 38 is long in the second direction D2. Once the coil portion 38 is formed on the insulator 40, the winding process S01 is complete.

[0051] In the mounting step S02, a worker or the like first removes the insulator 40, including the coil portion 38, from the mounting jig 91. As described above, the coil portion 38 is elongated in the second direction D2 when viewed from the first direction D1. Therefore, as shown in FIG. 10 , the restoring force Fr of the coil portion 38 facing the second direction D2 acts on the insulator 40 removed from the mounting jig 91. More specifically, the restoring force Fr of the coil portion 38 facing the other side (−D2 side) of the second direction D2 acts on the first insulator portion 41, and the restoring force Fr of the coil portion 38 facing one side (+D2 side) of the second direction D2 acts on the second insulator portion 45. As a result, the first protrusion 41a is pressed against the second insulator portion 45, and a force acting in the one direction in the second direction D2 acts on the first protrusion 41a. Furthermore, because the second protrusion 45a is pressed against the first insulator portion 41, a force acting in the other direction in the second direction D2 is applied to the second protrusion 45a. As described above, the protrusion 40b is deformable in the second direction D2. Therefore, the first protrusion 41a and the second protrusion 45a are each deformed in the second direction D2 by the applied force. The insulator 40 absorbs the restoring force Fr of the coil portion 38 by the deformation of the first protrusion 41a and the second protrusion 45a.

[0052] As described above, in the insulator 40 removed from the mounting jig 91, the first convex portion 41 a and the second convex portion 45 a are each deformed in the second direction D2, so that the dimension of the insertion hole 40 a in the second direction D2 becomes smaller than the dimension of the tooth portion 33 in the second direction D2. Also, as described above, the insulator 40 absorbs the restoring force Fr of the coil portion 38 by the deformation of the first convex portion 41 a and the second convex portion 45 a in the second direction D2. Therefore, the insulator 40 can be prevented from being deformed in the third direction D3 by the restoring force Fr of the coil portion 38. This prevents the dimension of the coil portion 38 in the third direction D3 from increasing.

[0053] As described above, in this embodiment, the number of turns of the coil wire wound around each insulator 40 increases radially outward. Therefore, the restoring force Fr of the coil portion 38 acting on the insulator 40 increases radially outward of the insulator 40.

[0054] Next, as shown in FIG. 11 , the worker sequentially attaches the insulators 40 removed from the attachment jig 91 to each tooth portion 33. The worker moves the insulator 40, for example, from one side (+D2 side) in the second direction D2 to the other side (-D2 side) in the second direction D2 to move it into the stator core 31, and then moves the insulator 40 radially outward to insert the tooth portion 33 into the insertion hole 40a. As a result, the insulator 40 is attached to the tooth portion 33. As described above, in the attachment step S02, the dimension of the insertion hole 40a in the second direction D2 is smaller than the dimension of the tooth portion 33 in the second direction D2 due to the restoring force Fr of the coil portion 38. Therefore, the worker applies a force Fa1 to the first insulator portion 41 in one direction in the second direction D2 and a force Fa2 to the second insulator portion 45 in the other direction in the second direction D2, thereby increasing the dimension of the insertion hole 40a in the second direction D2 and inserting the teeth 33 into the insertion hole 40a. As shown in Figure 2, the installation step S02 is completed when the insulators 40 are installed on each tooth 33. When the installation step S02 is completed, the assembly process for the stator 30 is completed.

[0055] As described above, in the present embodiment, the deformation of each of the first convex portion 41 a and the second convex portion 45 a in the second direction D2 can be prevented from increasing the dimension of the coil portion 38 in the third direction D3. Therefore, when the insulator 40 is attached to the tooth portion 33, the coil portion 38 can be prevented from coming into contact with the insulator 40 and the coil portion 38 that are arranged adjacent to each other in the circumferential direction.

[0056] Furthermore, in the present embodiment, as described above, the first convex portion 41 a and the second convex portion 45 a each absorb the restoring force Fr of the coil portion 38 and deform in the second direction D2. That is, after removal from the mounting jig 91, the insertion hole 40 a is likely to deform in the second direction D2 but is unlikely to deform in the third direction D3. Therefore, in the mounting step S02, by adjusting the positions of the first insulator portion 41 and the second insulator portion 45, which are arranged opposite each other in the second direction D2, the shape of the insertion hole 40 a can be adjusted to match the shape of the tooth portion 33.

[0057] According to this embodiment, the insulator 40 includes a first insulator portion 41, a second insulator portion 45 facing the first insulator portion 41 in the axial direction, i.e., the second direction D2, and a convex portion 40b protruding in the second direction D2. The convex portion 40b includes a first convex portion 41a protruding from the first insulator portion 41 toward the second insulator portion 45, and the first convex portion 41a is deformable. Therefore, as described above, when the insulator 40 is removed from the mounting jig 91 in the mounting step S02, the restoring force Fr of the coil portion 38 acting on the insulator 40 in the second direction D2 can be absorbed by deformation of the first convex portion 41a. This makes it easy to prevent the insulator 40 from being deformed in the third direction D3 by the restoring force Fr of the coil portion 38. This makes it easy to prevent the circumferential dimension of the coil portion 38 from increasing. Therefore, in the mounting step S02, when the insulator 40 is mounted on the tooth portion 33, the coil portion 38 formed on the insulator 40 can be prevented from coming into contact with the insulator 40 and the coil portion 38 that are arranged adjacent to each other in the circumferential direction. In addition, as described above, in the mounting step S02, by adjusting the positions of the first insulator portion 41 and the second insulator portion 45 that are arranged opposite each other in the second direction D2, the insertion holes 40a can be inserted so that the shape of the insertion holes 40a matches the shape of the tooth portion 33. Therefore, the insulator 40 can be easily mounted on the tooth portion 33, and an increase in the number of steps for assembling the stator 30 can be prevented.

[0058] According to this embodiment, the first protrusion 41 a is deformable in the second direction D2. Therefore, the restoring force Fr of the coil portion 38 acting in the second direction D2 on the insulator 40 removed from the mounting jig 91 can be absorbed by the deformation of the first protrusion 41 a in the second direction D2. This more effectively prevents the insulator 40 from being deformed in the third direction D3 by the restoring force Fr of the coil portion 38. Therefore, the circumferential dimension of the coil portion 38 can be more effectively prevented from increasing, which more effectively prevents the coil portion 38 from contacting the insulator 40 and the coil portion 38 that are adjacent to each other in the circumferential direction in the mounting step S02. This more effectively prevents an increase in the number of steps required to assemble the stator 30.

[0059] According to this embodiment, the insulator 40 has multiple protrusions 40b, including a second protrusion 45a protruding from the second insulator portion 45 toward the first insulator portion 41. The second protrusion 45a is deformable in the second direction D2. Therefore, the restoring force Fr of the coil portion 38 acting in the second direction D2 on the insulator 40 removed from the mounting jig 91 can be absorbed by the deformation of the second protrusion 45a in the second direction D2 in addition to the deformation of the first protrusion 41a. This more effectively prevents the insulator 40 from deforming in the third direction D3. This more effectively prevents the coil portion 38 from contacting the insulator 40 and the coil portion 38 that are adjacent to each other in the circumferential direction in the mounting step S02. This more effectively prevents an increase in the number of steps required to assemble the stator 30.

[0060] According to this embodiment, the tip of each of the protrusions 40b has an arc shape or an obtuse interior angle as viewed from the first direction D1. Therefore, compared to when the tip of each of the protrusions 40b has an acute interior angle, the increase in pressure applied to the tip of each of the protrusions 40b when the restoring force Fr of the coil portion 38 presses the protrusions 40b against the first insulator portion 41 and the second insulator portion 45 can be suppressed. This suppresses plastic deformation and damage to the protrusions 40b. This suppresses an increase in the amount of deformation of the insertion hole 40a of the insulator 40 as viewed from the first direction D1, thereby facilitating insertion of the tooth portion 33 into the insertion hole 40a in the mounting step S02. Therefore, the insulator 40 can be easily mounted to the tooth portion 33, thereby more effectively suppressing an increase in the number of steps required to assemble the stator 30.

[0061] According to this embodiment, the stator core 31 has an annular shape centered on the central axis J. The teeth 33 protrude radially, and the protruding portions 40b are provided on the radially outer portions of the insulators 40. As described above, in this embodiment, the number of turns of the coil wire wound around each insulator 40 increases radially outward. Therefore, as described above, the restoring force Fr of the coil portions 38 acting on the insulators 40 increases radially outward. In contrast, in this embodiment, the protruding portions 40b are provided on the radially outer portions of the insulators 40, and therefore the restoring force Fr acting in the second direction D2 is likely to be applied to the protruding portions 40b. This makes it easier to prevent the insulators 40 from deforming in the circumferential direction due to, for example, buckling of the protruding portions 40b in the circumferential direction. Therefore, in the mounting step S02, it is possible to more effectively prevent the coil portions 38 from contacting the insulators 40 and the coil portions 38 that are adjacent to each other in the circumferential direction. This more effectively prevents an increase in the number of steps required to assemble the stator 30. Furthermore, since the number of turns of the coil portion 38 attached to each tooth portion 33 can be increased, the output torque of the rotating electrical machine 10 can be increased while preventing the stator 30 from becoming larger.

[0062] According to this embodiment, the rotating electric machine 10 includes a plurality of insulators 40, the stator core 31 has a plurality of teeth 33, the teeth 33 are arranged in a circumferential direction about the central axis J, and each of the plurality of insulators 40 is attached to a different tooth 33. As described above, the circumferential dimension of the coil portion 38 formed in each insulator 40 can be preferably prevented from increasing, and therefore, in the attachment step S02, the coil portion 38 can be preferably prevented from contacting the insulator 40 and the coil portion 38 arranged adjacent to each other in the circumferential direction. Therefore, an increase in the number of steps for assembling the stator 30 can be preferably prevented.

[0063] 12 is a view of an insulator 140 included in a rotating electrical machine 110 of this modification, viewed from the radially outer side, i.e., the other side (-D1 side) in the first direction D1. In this modification, the insulator 140 has a recess 140d. In the following description, the same components as those in the first embodiment described above are denoted by the same reference numerals, and description thereof will be omitted.

[0064] The insulator 140 of this modification has a first insulator portion 141, a second insulator portion 145, an insertion hole 40a, a protrusion 40b, and a recess 140d. In this modification, the first insulator portion 141 and the second insulator portion 145 are different members from each other.

[0065] Although not shown, the first insulator portion 141 covers the upper portion of the tooth portion 33. The first insulator portion 141 has a first coil holding portion 42 (see FIG. 5), a first opposing portion 43 (see FIG. 5), a first flange portion 144, a first convex portion 41 a, and a first concave portion 144 d.

[0066] The first flange portion 144 is connected to the radially outer end of the first coil holding portion 42. The first flange portion 144 protrudes upward and on both circumferential sides from the first coil holding portion 42. The first flange portion 144 insulates the coil portion 38 from the core back portion 32. When viewed from the radial direction, the first flange portion 144 has a substantially rectangular shape.

[0067] In this modification, the first recess 144d is recessed upward from the lower end of the portion of the first flange portion 144 on the other side (-D3 side) in the third direction D3 (i.e., toward one side (+D2 side) in the second direction D2). That is, the first recess 144d is recessed in the second direction D2. The first recess 144d is provided in a radially outer portion of the insulator 140. In this modification, the first recess 144d is substantially semicircular when viewed from the radial direction. When viewed from the radial direction, the first recess 144d may have other shapes, such as a triangular shape or a rectangular shape. A portion of the second protrusion 45a is inserted into the first recess 144d in the second direction D2. The second protrusion 45a may or may not be in contact with the inner surface of the first recess 144d. Other configurations of the first insulator portion 141 of this modified example are similar to other configurations of the first insulator portion 41 of the above-described first embodiment.

[0068] The second insulator portion 145 faces the first insulator portion 141 in the axial direction. Although not shown, the second insulator portion 145 covers the lower portion of the tooth portion 33. The second insulator portion 145 has a second coil holding portion 46 (see FIG. 5), a second opposing portion 47 (see FIG. 5), a second flange portion 148, a second convex portion 45a, and a second concave portion 148d. In this modified example, the second insulator portion 145 and the first insulator portion 141 are members of the same shape. The shape of the second insulator portion 145 is the same as the shape of the first insulator portion 141 rotated 180 degrees around the axis Jt.

[0069] The second flange portion 148 is connected to the radially outer end of the second coil holding portion 46. The second flange portion 148 protrudes downward and on both circumferential sides from the second coil holding portion 46. The second flange portion 148 insulates the coil portion 38 from the core back portion 32. When viewed from the radial direction, the second flange portion 148 has a substantially rectangular shape.

[0070] In this modification, the second recess 148d is recessed downward from the upper end of a portion of the second flange portion 148 on one side (+D3 side) in the third direction D3, i.e., on the other side (-D2 side) in the second direction D2. That is, the second recess 148d is recessed in the second direction D2. The second recess 148d is provided on the radially outer portion of the insulator 140. In this modification, the second recess 148d is substantially semicircular when viewed from the radial direction. When viewed from the radial direction, the second recess 148d may have other shapes, such as a triangular shape or a rectangular shape. A portion of the first protrusion 41a is inserted into the second recess 148d in the second direction D2. The first protrusion 41a may or may not be in contact with the inner surface of the second recess 148d. Other configurations of the second insulator portion 145 of this modified example are similar to other configurations of the second insulator portion 45 of the above-described first embodiment.

[0071] In this modified example, the insulator 140 has a plurality of recesses 140d. The plurality of recesses 140d includes a first recess 144d and a second recess 148d. As described above, each of the first recess 144d and the second recess 148d is recessed in the second direction D2. That is, each recess 140d is recessed in the second direction D2. As described above, a portion of the second protrusion 45a is inserted into the first recess 144d in the second direction D2, and a portion of the first protrusion 41a is inserted into the second recess 148d in the second direction D2. That is, a portion of the protrusion 40b can be inserted into each recess 140d in the second direction D2. Other configurations of the insulator 140 of this modified example are similar to those of the insulator 40 of the first embodiment described above. Other configurations of the rotating electric machine 110 of this modified example are similar to other configurations of the rotating electric machine 10 of the above-described first embodiment.

[0072] According to this modification, the insulator 140 has a recess 140d recessed in the second direction D2, into which a portion of the protrusion 40b can be inserted in the second direction D2. Therefore, by inserting a portion of the protrusion 40b into the recess 140d in the second direction D2, it is possible to prevent the second insulator portion 145 from being misaligned in the third direction D3 relative to the first insulator portion 141. Therefore, in the above-described mounting step S02, when the insulator 140 is removed from the mounting jig 91, even if the restoring force Fr of the coil portion 38 is applied to each of the first insulator portion 41 and the second insulator portion 145, deformation of the insulator 140 in the third direction D3 can be prevented. This more effectively prevents the circumferential dimension of the coil portion 38 from increasing. Therefore, in the mounting step S02, the coil portion 38 can be more effectively prevented from coming into contact with the insulator 140 and the coil portion 38 that are arranged adjacent to each other in the circumferential direction. Therefore, an increase in the number of steps required to assemble the stator 130 can be more effectively prevented.

[0073] <Second Modification of First Embodiment> Fig. 13 is a perspective view showing an insulator 240 included in a rotating electric machine 210 of this modification. In this modification, the insulator 240 has a plurality of protrusions 240b. Each of the protrusions 240b is provided with a through hole 240e. In the following description, the same components as those in the first embodiment described above are denoted by the same reference numerals, and description thereof will be omitted.

[0074] The insulator 240 of this modification has a first insulator portion 241, a second insulator portion 245, an insertion hole 40a, and a plurality of protrusions 240b. In this modification, the first insulator portion 241 and the second insulator portion 245 are different members from each other.

[0075] Although not shown, the first insulator portion 241 covers the upper portion of the tooth portion 33. The first insulator portion 241 has a first coil holding portion 42, a first opposing portion 43, a first flange portion 44, and first convex portions 241b and 241c. As shown in Fig. 14, the first insulator portion 241 has a first convex portion 241a.

[0076] The first convex portion 241a protrudes downward from the lower end of a portion of the first flange portion 44 on one side (+D3 side) in the third direction D3, i.e., toward the other side (-D2 side) in the second direction D2. The first convex portion 241a protrudes in the second direction D2. The first convex portion 241a is provided on a radially outer portion of the first insulator portion 241. The first convex portion 241a is provided on a portion of the insulator 240 on the other side (-D1 side) in the first direction D1. A first through hole 241e is provided in the first convex portion 241a. The first through hole 241e is a hole that penetrates the first convex portion 241a in the first direction D1. In other words, the first through hole 241e is a hole that penetrates the first convex portion 241a in a direction intersecting the second direction D2. The first protrusion 241a does not necessarily have to have the first through-hole 241e.

[0077] As shown in FIG. 13 , each of the first protrusions 241b, 241c protrudes downward from the lower end of the portion of the first coil holding portion 42 on the other side (−D3 side) in the third direction D3, i.e., toward the other side (−D2 side) in the second direction D2. Each of the first protrusions 241b, 241c protrudes in the second direction D2. The first protrusions 241b, 241c are arranged side by side in the radial direction. The first protrusion 241c is arranged radially inward of the first protrusion 241b. The first protrusion 241b is provided on a radially outer portion of the first insulator portion 241. The first protrusion 241b is provided on a portion of the insulator 240 on the other side (−D1 side) in the first direction D1. The first protrusion 241c is provided on a radially inner portion of the first insulator portion 241. The first convex portion 241c is provided on one side (+D1 side) of the insulator 240 in the first direction D1. The first convex portions 241b, 241c are provided with first through holes 241f, 241g, respectively. The first through hole 241f is a hole that penetrates the first convex portion 241b in the third direction D3. The first through hole 241g is a hole that penetrates the first convex portion 241c in the third direction D3. In other words, the first through holes 241f, 241g are holes that penetrate the first convex portions 241b, 241c in a direction intersecting the second direction D2. Note that the first through holes 241f, 241g do not necessarily have to be provided in the first convex portions 241b, 241c, respectively.

[0078] Each of the first convex portions 241a, 241b, and 241c is deformable in the second direction D2 by an external force. In this modification, each of the first convex portions 241a, 241b, and 241c is elastically deformable in the second direction D2. Each of the first convex portions 241a, 241b, and 241c is in contact with the second insulator portion 245 in the second direction D2. Other configurations of the first insulator portion 241 in this modification are similar to those of the first insulator portion 41 in the first embodiment described above.

[0079] The second insulator portion 245 faces the first insulator portion 241 in the axial direction. Although not shown, the second insulator portion 245 covers the lower portion of the tooth portion 33. The second insulator portion 245 has a second coil holding portion 46, a second opposing portion 47, a second flange portion 48, and second convex portions 245a, 245b, and 245c. In this modified example, the second insulator portion 245 and the first insulator portion 241 are members of the same shape. The shape of the second insulator portion 245 is the same as the shape of the first insulator portion 241 rotated 180° around the axis Jt.

[0080] As shown in FIG. 14 , the second convex portion 245a protrudes upward from the upper end of the portion of the second flange portion 48 on the other side (−D3 side) in the third direction D3, i.e., toward one side (+D2 side) in the second direction D2. The second convex portion 245a protrudes in the second direction D2. The second convex portion 245a is provided on a radially outer portion of the second insulator portion 245. The second convex portion 245a is provided on a portion of the insulator 240 on the other side (−D1 side) in the first direction D1. The second convex portion 245a is provided with a second through hole 245e. The second through hole 245e is a hole that penetrates the second convex portion 245a in the first direction D1. That is, the second through hole 245e is a hole that penetrates the second convex portion 245a in a direction intersecting the second direction D2. The second protrusion 245a does not necessarily have to have the second through-hole 245e.

[0081] As shown in FIG. 13 , each of the second protrusions 245b, 245c protrudes upward from the upper end of a portion of the second coil holding portion 46 on one side (+D3 side) in the third direction D3, i.e., on one side (+D2 side) in the second direction D2. Each of the second protrusions 245b, 245c protrudes in the second direction D2. The second protrusions 245b, 245c are arranged side by side in the radial direction. The second protrusion 245c is arranged radially inward of the second protrusion 245b. The second protrusion 245b is provided on a radially outer portion of the second insulator portion 245. The second protrusion 245b is provided on a portion of the insulator 240 on the other side (-D1 side) in the first direction D1. The second protrusion 245c is provided on a radially inner portion of the second insulator portion 245. The second convex portion 245c is provided on one side (+D1 side) of the insulator 240 in the first direction D1. Second through holes 245f and 245g are provided in the second convex portions 245b and 245c, respectively. The second through hole 245f is a hole that penetrates the second convex portion 245b in the third direction D3. The second through hole 245g is a hole that penetrates the second convex portion 245c in the third direction D3. In other words, the second through holes 245f and 245g are holes that penetrate the second convex portions 245b and 245c in a direction intersecting the second direction D2. Note that the second through holes 245f and 245g do not necessarily have to be provided in the second convex portions 245b and 245c, respectively.

[0082] Each of the second convex portions 245a, 245b, and 245c is deformable in the second direction D2 by an external force. In this modification, each of the second convex portions 245a, 245b, and 245c is elastically deformable in the second direction D2. Each of the second convex portions 245a, 245b, and 245c is in contact with the first insulator portion 241 in the second direction D2. Other configurations of the second insulator portion 245 in this modification are similar to other configurations of the second insulator portion 45 in the first embodiment described above.

[0083] As described above, the insulator 240 has a plurality of protruding portions 240b. The plurality of protruding portions 240b include first protruding portions 241a, 241b, and 241c and second protruding portions 245a, 245b, and 245c. As described above, the first protruding portions 241a, 241b, and 241c and the second protruding portions 245a, 245b, and 245c each protrude in the second direction D2. That is, each protruding portion 240b protrudes in the second direction D2. As described above, the first protruding portions 241a and 241b and the second protruding portions 245a and 245b are each provided on the radially outer side of the insulator 240, i.e., on the other side (-D1 side) of the first direction D1. That is, at least one of the multiple protrusions 240b is provided on the other side of the insulator 240 in the first direction D1. Furthermore, each of the first protrusion 241c and the second protrusion 245c is provided on the radially inner side of the insulator 240, i.e., on one side (+D1 side) in the first direction D1. That is, at least one of the multiple protrusions 240b is provided on the one side of the insulator 240 in the first direction D1.

[0084] As described above, the convex portion 240b is provided with the through hole 240e. In this modification, the through hole 240e includes first through holes 241e, 241f, and 241g and second through holes 245e, 245f, and 245g. As described above, the first through holes 241e, 241f, and 241g are holes that penetrate the first convex portions 241a, 241b, and 241c in a direction intersecting with the second direction D2. The second through holes 245e, 245f, and 245g are holes that penetrate the second convex portions 245a, 245b, and 245c in a direction intersecting with the second direction D2. As a result, the convex portion 240b is provided with the through hole 240e that penetrates the convex portion 240b in a direction intersecting with the second direction D2. Other configurations of the insulator 240 of this modified example are similar to other configurations of the insulator 40 of the above-described first embodiment. Other configurations of the rotating electric machine 210 of this modified example are similar to other configurations of the rotating electric machine 10 of the above-described first embodiment.

[0085] According to this modification, at least one of the plurality of protrusions 240b is provided on the radially inner side of the insulator 240, i.e., on one side (+D1) in the first direction D1, and at least one of the plurality of protrusions 240b is provided on the radially outer side of the insulator 240, i.e., on the other side (-D1 side) in the first direction D1. Thus, on both sides in the first direction D1, the first insulator portion 241 and the second insulator portion 245 are supported by the protrusions 240b in the second direction D2. Therefore, in the above-described mounting step S02, even if the restoring force Fr of the coil portion 38 is applied to each of the first insulator portion 241 and the second insulator portion 245 when the insulator 240 is removed from the mounting jig 91, the second insulator portion 245 can be prevented from tilting about the third direction D3 relative to the first insulator portion 241. This prevents the dimension of the insertion hole 40a in the second direction D2 from becoming too small across the entire insertion hole 40a in the first direction D1. Therefore, in the mounting step S02, the tooth portions 33 can be more easily inserted into the insertion hole 40a. Therefore, since the insulator 240 can be more easily mounted on the tooth portions 33, an increase in the number of steps required for assembling the stator 230 can be more effectively prevented.

[0086] According to this modification, the protrusion 240b is provided with a through-hole 240e penetrating the protrusion 240b in a direction intersecting the second direction D2. This facilitates reducing the rigidity of the protrusion 240b in the second direction D2, making it easier to elastically deform the protrusion 240b in the second direction D2. This allows the restoring force Fr of the coil portion 38 acting in the second direction D2 on each of the first insulator portion 241 and the second insulator portion 245 to be more effectively absorbed by the deformation of the protrusion 240b in the second direction D2. This effectively prevents the insulator 240 from deforming in the circumferential direction. Therefore, in the mounting step S02, it is more effectively prevented the coil portion 38 from contacting the insulator 240 and the coil portion 38 arranged adjacent to each other in the circumferential direction. This effectively prevents an increase in the number of steps required to assemble the stator 230.

[0087] Second Embodiment FIG. 15 is a perspective view showing an insulator 340 included in a rotating electric machine 310 according to this embodiment. In this embodiment, the insulator 340 has a first insulator portion 341, a second insulator portion 345, an insertion hole 340a, and a connecting portion 349. The first insulator portion 341 is an upper portion of the insulator 340. The second insulator portion 345 is a lower portion of the insulator 340. The connecting portion 349 connects the first insulator portion 341 and the second insulator portion 345 in the axial direction, i.e., the second direction D2. In this embodiment, the first insulator portion 341, the second insulator portion 345, and the connecting portion 349 are each part of the same single member. In this embodiment, the insulator 340 is integrally formed by the first insulator portion 341, the second insulator portion 345, and the connecting portion 349. In this embodiment, the second insulator portion 345 and the first insulator portion 341 have the same shape. The shape of the second insulator portion 345 is the same as the shape of the first insulator portion 341 rotated 180 degrees around the axis Jt. In the following description, the same reference numerals are used to designate components that are the same as those in the first embodiment, and descriptions thereof will be omitted.

[0088] Although not shown, the insulator 340 is attached to the tooth portion 33. The insulator 340 extends in the first direction D1 and surrounds the tooth portion 33 around an axis Jt that passes through the tooth portion 33 (not shown). The dimension of the insulator 340 in the second direction D2 is greater than the dimension in the third direction D3. Therefore, when viewed from the first direction D1, the insulator 340 is longer in the second direction D2.

[0089] The first insulator portion 341 has a first coil holding portion 42, a first opposing portion 343, and a first flange portion 344. The first opposing portion 343 is connected to the radially inner end of the first coil holding portion 42. The first opposing portion 343 protrudes upward and on both circumferential sides from the first coil holding portion 42. When viewed from the radial direction, the first opposing portion 343 has a substantially rectangular shape. A hole portion 343a is provided in the first opposing portion 343. The hole portion 343a is a hole that penetrates the first opposing portion 343 in the radial direction. The hole portion 343a is open to the downward side.

[0090] The first flange portion 344 is connected to the radially outer end of the first coil holding portion 42. The first flange portion 344 protrudes upward and to both circumferential sides from the first coil holding portion 42. When viewed radially, the first flange portion 344 has a substantially rectangular shape. The first flange portion 344 is provided with a hole 344a. The hole 344a is a hole that penetrates the first flange portion 344 in the radial direction. The hole 344a is open to the lower side. The interior of the first coil holding portion 42, the hole 343a, and the hole 344a overlap in the radial direction. Other configurations of the first insulator portion 341 of this embodiment are similar to those of the first insulator portion 41 of the first embodiment described above.

[0091] The second insulator portion 345 is disposed with a gap between it and the first insulator portion 341 in the axial direction. The second insulator portion 345 faces the first insulator portion 341 in the axial direction, i.e., the second direction D2. The second insulator portion 345 has a second coil holding portion 46, a second opposing portion 347, and a second flange portion 348. The second coil holding portion 46 faces the first coil holding portion 42 with a gap between them in the axial direction. The second opposing portion 347 is connected to the radially inner end of the second coil holding portion 46. The second opposing portion 347 protrudes downward and to both sides in the circumferential direction from the second coil holding portion 46. The second opposing portion 347 faces the first opposing portion 343 with a gap between them in the axial direction. When viewed in the radial direction, the second opposing portion 347 has a substantially rectangular shape. A hole 347a is provided in the second opposing portion 347. The hole 347a is a hole that penetrates the second opposing portion 347 in the radial direction. The hole 347a is open to the upper side.

[0092] The second flange portion 348 is connected to the radially outer end of the second coil holding portion 46. The second flange portion 348 protrudes downward and to both circumferential sides from the second coil holding portion 46. The second flange portion 348 faces the first flange portion 344 with a gap in the axial direction. When viewed from the radial direction, the second flange portion 348 has a substantially rectangular shape. The second flange portion 348 is provided with a hole 348a. The hole 348a is a hole that penetrates the second flange portion 348 in the radial direction. The hole 348a is open to the upper side. The interior of the second coil holding portion 46, the hole 347a, and the hole 348a overlap in the radial direction. Other configurations of the second insulator portion 345 of this embodiment are similar to those of the second insulator portion 45 of the first embodiment described above.

[0093] The insertion hole 340a is a hole that penetrates the insulator 340 in the radial direction. When viewed in the radial direction, the insertion hole 340a is a rectangular hole that is long in the axial direction. In this embodiment, the insertion hole 340a is configured by the interior of the first coil holding portion 42, the interior of the second coil holding portion 46, hole 343a, hole 344a, hole 347a, and hole 348a. Although not shown in the figure, the tooth portion 33 is inserted radially into the insertion hole 340a. In this way, the insulator 340 is attached to the tooth portion 33.

[0094] In the axial direction, the connection portion 349 is disposed between the first coil holding portion 42 and the second coil holding portion 46. When viewed from the third direction D3, the connection portion 349 has a generally N-shape that protrudes radially, i.e., in the first direction D1. In this embodiment, the connection portion 349 has a first connection portion 349a and a second connection portion 349b. The connection portion 349 is deformable in the axial direction, i.e., in the second direction D2.

[0095] The first connecting portion 349a is disposed between a portion of the first coil holding portion 42 on the other side (-D3 side) in the third direction D3 (the -D3 side) and a portion of the second coil holding portion 46 on the other side in the third direction D3. The upper end of the first connecting portion 349a is axially connected to the first coil holding portion 42. The lower end of the first connecting portion 349a is axially connected to the second coil holding portion 46. As a result, the first connecting portion 349a connects the first insulator portion 341 and the second insulator portion 345 in the second direction D2. The dimension of the first connecting portion 349a in the first direction D1 is smaller than the dimension of the first coil holding portion 42 and the dimension of the second coil holding portion 46 in the first direction D1. The rigidity of the first connecting portion 349a is smaller than the rigidity of the first coil holding portion 42 and the second coil holding portion 46. The first connecting portion 349a is deformable in the second direction D2 in response to an external force directed in the second direction D2. In the present embodiment, the first connecting portion 349a is elastically deformable in the second direction D2. Note that the first connecting portion 349a may also be plastically deformed in response to the external force.

[0096] The second connection portion 349b is disposed between a portion of the first coil holding portion 42 on one side (+D3 side) in the third direction D3 and a portion of the second coil holding portion 46 on one side in the third direction D3. The upper end of the second connection portion 349b is axially connected to the first coil holding portion 42. The lower end of the second connection portion 349b is axially connected to the second coil holding portion 46. As a result, the second connection portion 349b connects the first insulator portion 341 and the second insulator portion 345 in the second direction D2. The dimension of the second connection portion 349b in the first direction D1 is smaller than the dimension of the first coil holding portion 42 and the dimension of the second coil holding portion 46 in the first direction D1. The rigidity of the second connection portion 349b is smaller than the rigidity of the first coil holding portion 42 and the second coil holding portion 46. The second connecting portion 349b is deformable in the second direction D2 due to an external force directed in the second direction D2. In the present embodiment, the second connecting portion 349b is elastically deformable in the second direction D2. Note that the second connecting portion 349b may be plastically deformed due to an external force. Other configurations of the insulator 340 of the present embodiment are similar to the other configurations of the insulator 40 of the first embodiment described above. Other configurations of the rotating electric machine 310 of the present embodiment are similar to the other configurations of the rotating electric machine 10 of the first embodiment described above.

[0097] According to this embodiment, the insulator 340 includes a first insulator portion 341, a second insulator portion 345 facing the first insulator portion 341 in the second direction D2, and a connecting portion 349 connecting the first insulator portion 341 and the second insulator portion 345 in the second direction D2. The connecting portion 349 is deformable in the second direction D2. Therefore, when the insulator 340 is removed from the mounting jig 91 in the above-described mounting step S02, the restoring force Fr of the coil portion 38 acting on the insulator 340 in the second direction D2 can be absorbed by the deformation of the connecting portion 349 in the second direction D2. This prevents the insulator 340 from being deformed in the third direction D3 by the restoring force Fr of the coil portion 38. This makes it easier to prevent the circumferential dimension of the coil portion 38 from increasing. Therefore, in the mounting step S02, when the insulator 340 is mounted on the tooth portion 33, the coil portion 38 formed on the insulator 340 can be prevented from coming into contact with the insulator 340 and the coil portion 38 that are arranged adjacent to each other in the circumferential direction. Therefore, the insulator 340 can be easily mounted on the tooth portion 33, and an increase in the number of steps required to assemble the stator 330 can be prevented.

[0098] As described above, in this embodiment, the insulator 340 is integrally formed by the first insulator portion 341, the second insulator portion 345, and the connecting portion 349. Therefore, compared to a case where the first insulator portion 341, the second insulator portion 345, and the connecting portion 349 are separate members, for example, it is possible to prevent an increase in the number of parts of the insulator 340. Therefore, it is easy to prevent an increase in the number of steps in manufacturing the stator 330.

[0099] <Modification of Second Embodiment> FIG. 16 is a perspective view showing an insulator 440 included in a rotating electric machine 410 of this modification. In this modification, the insulator 440 has a first insulator portion 441, a second insulator portion 445, an insertion hole 440a, and a connecting portion 449. The connecting portion 449 connects the first insulator portion 441 and the second insulator portion 445 to each other in the axial direction, i.e., the second direction D2. In this modification, the insulator 440 is integrally formed by the first insulator portion 441, the second insulator portion 445, and the connecting portion 449. In this modification, the second insulator portion 445 and the first insulator portion 441 have the same shape. The shape of the second insulator portion 445 is the same as the shape of the first insulator portion 441 rotated 180 degrees around the axis Jt. In the following description, the same components as those in the second embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

[0100] The first insulator portion 441 has a first coil holding portion 42, a first opposing portion 443, and a first flange portion 444. The first opposing portion 443 is connected to the radially inner end of the first coil holding portion 42. The first opposing portion 443 protrudes upward and on both circumferential sides from the first coil holding portion 42. When viewed from the radial direction, the first opposing portion 443 has a substantially rectangular shape. A hole portion 443a is provided in the first opposing portion 443. The hole portion 443a is a hole that penetrates the first opposing portion 443 in the radial direction. The hole portion 443a is open to the downward side.

[0101] The first flange portion 444 is connected to the radially outer end of the first coil holding portion 42. The first flange portion 444 protrudes upward and to both circumferential sides from the first coil holding portion 42. When viewed radially, the first flange portion 444 has a substantially rectangular shape. The first flange portion 444 is provided with a hole 444a. The hole 444a is a hole that penetrates the first flange portion 444 in the radial direction. The hole 444a is open to the downward side. The interior of the first coil holding portion 42, the hole 443a, and the hole 444a overlap in the radial direction. Other configurations of the first insulator portion 441 of this modified example are similar to other configurations of the first insulator portion 341 of the second embodiment described above.

[0102] The second insulator portion 445 faces the first insulator portion 441 in the axial direction, i.e., the second direction D2. The second insulator portion 445 has a second coil holding portion 46, a second opposing portion 447, and a second flange portion 448. The second coil holding portion 46 faces the first coil holding portion 42 with a gap in the axial direction. The second opposing portion 447 is connected to the radially inner end of the second coil holding portion 46. The second opposing portion 447 protrudes downward and on both sides in the circumferential direction from the second coil holding portion 46. When viewed in the radial direction, the second opposing portion 447 has a substantially rectangular shape. The second opposing portion 447 is connected to the first opposing portion 443 in the axial direction. A hole 447a is provided in the second opposing portion 447. The hole 447a is a hole that penetrates the second opposing portion 447 in the radial direction. The hole 447a is open to the upper side.

[0103] The second flange portion 448 is connected to the radially outer end of the second coil holding portion 46. The second flange portion 448 protrudes downward and on both circumferential sides from the second coil holding portion 46. When viewed radially, the second flange portion 448 has a substantially rectangular shape. The second flange portion 448 is connected to the first flange portion 444 in the axial direction. The second flange portion 448 is provided with a hole portion 448a. The hole portion 448a is a hole that penetrates the second flange portion 448 in the radial direction. The hole portion 448a is open to the upper side. The interior of the second coil holding portion 46, the hole portion 447a, and the hole portion 448a overlap in the radial direction. Other configurations of the second insulator portion 445 of this modified example are similar to other configurations of the second insulator portion 345 of the second embodiment described above.

[0104] The insertion hole 440a is a hole that penetrates the insulator 440 in the radial direction. When viewed in the radial direction, the insertion hole 440a is a rectangular hole that is long in the axial direction. In this modified example, the insertion hole 440a is configured by the interior of the first coil holding portion 42, the interior of the second coil holding portion 46, hole 443a, hole 444a, hole 447a, and hole 448a. Although not shown in the figure, the tooth portion 33 is inserted radially into the insertion hole 440a. In this way, the insulator 440 is attached to the tooth portion 33.

[0105] In the axial direction, the connection portion 449 is disposed between the first coil holding portion 42 and the second coil holding portion 46. The connection portion 449 is deformable in the axial direction, i.e., the second direction D2. In this modification, the connection portion 449 has a first connection portion 449a and a second connection portion 449b.

[0106] The first connecting portion 449a is disposed between a portion of the first coil holding portion 42 on the other side (-D3 side) in the third direction D3 and a portion of the second coil holding portion 46 on the other side in the third direction D3. The first connecting portion 449a is axially connected to each of the first coil holding portion 42 and the second coil holding portion 46. In this modification, the first connecting portion 449a has a generally rectangular plate shape with its plate surface facing the third direction D3. The first connecting portion 449a is provided with a first hole 449d. The first hole 449d is a hole that penetrates the first connecting portion 449a in the third direction D3. The first hole 449d is an elongated hole that extends in the first direction D1. A radially inner edge and a radially outer edge of the first connecting portion 449a are axially connected to the first insulator portion 441 and the second insulator portion 445. As described above, the first connecting portion 449a has the first hole 449d, and therefore the rigidity of the first connecting portion 449a is smaller than the rigidity of the first coil holding portion 42 and the rigidity of the second coil holding portion 46. The first connecting portion 449a is deformable in the second direction D2 due to an external force directed in the second direction D2. In this modification, the first connecting portion 449a is elastically deformable in the second direction D2.

[0107] The second connection portion 449b is disposed between a portion of the first coil holding portion 42 on one side (+D3 side) in the third direction D3 and a portion of the second coil holding portion 46 on one side in the third direction D3. The second connection portion 449b is axially connected to each of the first coil holding portion 42 and the second coil holding portion 46. In this modification, the second connection portion 449b has a generally rectangular plate shape with its plate surface facing the third direction D3. The second connection portion 449b is provided with a second hole portion 449e. The second hole portion 449e is a hole that penetrates the second connection portion 449b in the third direction D3. The second hole portion 449e is an elongated hole that extends in the first direction D1. This allows the radially inner edge portion and the radially outer edge portion of the second connection portion 449b to be axially connected to the first insulator portion 441 and the second insulator portion 445. As described above, the second connection portion 449b is provided with the second hole portion 449e, and therefore the rigidity of the second connection portion 449b is smaller than the rigidity of the first coil holding portion 42 and the rigidity of the second coil holding portion 46. The second connection portion 449b is deformable in the second direction D2 due to an external force directed in the second direction D2. In this modification, the second connection portion 449b is elastically deformable in the second direction D2. Other configurations of the insulator 440 of this modification are similar to the other configurations of the insulator 340 of the second embodiment described above. Other configurations of the rotating electric machine 410 of this modification are similar to the other configurations of the rotating electric machine 310 of the second embodiment described above.

[0108] According to this modification, the insulator 440 includes a first insulator portion 441, a second insulator portion 445 facing the first insulator portion 441 in the second direction D2, and a connecting portion 449 connecting the first insulator portion 441 and the second insulator portion 445 in the second direction D2, and the connecting portion 449 is deformable in the second direction D2. Therefore, as in the second embodiment described above, in the mounting step S02, the restoring force Fr of the coil portion 38 applied to the insulator 440 in the second direction D2 can be absorbed by the deformation of the connecting portion 449 in the second direction D2. Therefore, when the insulator 440 is mounted to the tooth portion 33, the coil portion 38 formed on the insulator 440 can be prevented from coming into contact with the insulator 440 and the coil portion 38 arranged adjacent to it in the circumferential direction. Therefore, the insulator 440 can be easily attached to the tooth portion 33, and an increase in the number of steps required to assemble the stator 430 can be suppressed.

[0109] Although the embodiments of the present invention have been described above, the configurations and combinations thereof in the embodiments are merely examples, and additions, omissions, substitutions, and other modifications of the configurations are possible without departing from the spirit of the present invention. Furthermore, the present invention is not limited to the embodiments.

[0110] For example, the first insulator portion and the second insulator portion do not have to have the same shape. Even in such a configuration, the protrusion or the connecting portion can prevent the insulator from deforming in the third direction, thereby preventing an increase in the number of steps required to assemble the stator.

[0111] The application of the rotating electric machine to which the present invention is applied is not particularly limited. The rotating electric machine may be installed in equipment other than vehicles. Note that the configurations described above in this specification can be combined as appropriate within a range that does not contradict each other.

[0112] The present technology may be configured as follows: (1) A rotating electric machine including: a stator core having teeth; an insulator extending in a first direction, surrounding the teeth around an axis passing through the teeth, and elongated in a second direction perpendicular to the first direction as viewed from the first direction; and a coil formed of an elastic coil wire and wound around the insulator, wherein the insulator has a first insulator portion, a second insulator portion facing the first insulator portion in the second direction, and a convex portion protruding in the second direction, the convex portion including a first convex portion protruding from one of the first insulator portion or the second insulator portion toward the other of the first insulator portion or the second insulator portion, the first convex portion being deformable. (2) The rotating electric machine described in (1), wherein the first convex portion is deformable in the second direction. (3) The rotating electric machine according to (2), wherein the insulator has a plurality of the protruding portions, and the plurality of the protruding portions include a second protruding portion protruding from the other of the first insulator portion and the second insulator portion toward one of the first insulator portion and the second insulator portion, and the second protruding portion is deformable in the second direction. (4) The rotating electric machine according to any one of (1) to (3), wherein, when viewed from either the first direction or a third direction perpendicular to each of the first direction and the second direction, a tip of the protruding portion has an arc shape or an obtuse interior angle. (5) The rotating electric machine according to any one of (1) to (4), wherein the insulator has a recess recessed in the second direction, and a portion of the protruding portion can be inserted into the recess in the second direction. (6) The rotating electric machine according to any one of (1) to (5), wherein the first insulator portion and the second insulator portion are made of different members. (7) The rotating electric machine according to any one of (1) to (6), wherein the stator core is annular about a central axis, the teeth protrude in a radial direction, and the protrusions are provided on radially outer portions of the insulator.(8) The rotating electric machine according to any one of (1) to (6), wherein the insulator has a plurality of the protruding portions, the stator core has a core back portion surrounding a central axis, the teeth portion protrude from the core back portion in the first direction, at least one of the plurality of protruding portions is provided on one side of the insulator in the first direction, and at least one of the plurality of protruding portions is provided on the other side of the insulator in the first direction. (9) The rotating electric machine according to any one of (1) to (8), wherein the protruding portions are provided with through holes penetrating the protruding portions in a direction intersecting with the second direction. (10) A rotating electric machine comprising: a stator core having teeth portions; an insulator extending in a first direction, surrounding the teeth portions around an axis passing through the teeth portions, and elongated in a second direction perpendicular to the first direction as viewed from the first direction; and a coil portion made of an elastic coil wire wound around the insulator, wherein the insulator has a first insulator portion, a second insulator portion facing the first insulator portion in the second direction, and a connecting portion connecting the first insulator portion and the second insulator portion in the second direction, the connecting portion being deformable in the second direction. (11) A rotating electric machine according to any one of (1) to (10), comprising: a plurality of the insulators, the stator core having a plurality of the teeth portions, the plurality of the teeth portions being arranged in a circumferential direction about a central axis, and each of the plurality of the insulators being attached to a different one of the teeth portions.

[0113] DESCRIPTION OF SYMBOLS 10, 110, 210, 310, 410... Rotating electric machine, 31... Stator core, 32... Core back portion, 33... Teeth portion, 38... Coil portion, 40, 140, 240, 340, 440... Insulator, 40b, 240b... Convex portion, 41, 141, 241, 341, 441... First insulator portion, 41a, 241a, 241b, 241c... First convex portion, 45, 145, 245, 345, 445... Second insulator portion, 45a, 245a, 245b, 245c... Second convex portion, 140d... Concave portion, 240e... Through hole, D1... First direction, D2... Second direction, D3... Third direction, 349, 449... Connection portion, J... Central axis, Jt... Axis

Claims

1. A rotating electric machine comprising: a stator core having teeth; an insulator extending in a first direction and surrounding the teeth around an axis passing through the teeth, and long in a second direction perpendicular to the first direction when viewed from the first direction; and a coil formed of elastic coil wire and wound around the insulator, wherein the insulator has a first insulator portion, a second insulator portion facing the first insulator portion in the second direction, and a convex portion protruding in the second direction, the convex portion including a first convex portion protruding from either the first insulator portion or the second insulator portion toward the other of the first insulator portion or the second insulator portion, and the first convex portion is deformable.

2. A rotating electric machine according to claim 1, wherein the first protrusion is deformable in the second direction.

3. A rotating electric machine as described in claim 2, wherein the insulator has a plurality of the protrusions, the plurality of protrusions including a second protrusion protruding from the other of the first insulator portion and the second insulator portion toward one of the first insulator portion and the second insulator portion, and the second protrusion is deformable in the second direction.

4. A rotating electric motor as described in claim 1, wherein the tip of the convex portion is arc-shaped or angular with an obtuse interior angle when viewed from either the first direction or a third direction perpendicular to both the first direction and the second direction.

5. A rotating electric machine according to claim 1, wherein the insulator has a recess recessed in the second direction, and a part of the protrusion can be inserted into the recess in the second direction.

6. The rotating electric machine according to claim 1, wherein the first insulator portion and the second insulator portion are made of different materials.

7. A rotating electric machine according to claim 1, wherein the stator core is annular about a central axis, the teeth protrude radially, and the protrusions are provided on the radially outer portion of the insulator.

8. A rotating electric machine as described in claim 1, wherein the insulator has a plurality of the protrusions, the stator core has a core back portion surrounding a central axis, the teeth protrude from the core back portion in the first direction, at least one of the plurality of protrusions is provided on one side of the insulator in the first direction, and at least one of the plurality of protrusions is provided on the other side of the insulator in the first direction.

9. The rotating electric machine according to claim 1, wherein the protrusion is provided with a through-hole that penetrates the protrusion in a direction intersecting the second direction.

10. A rotating electric machine comprising: a stator core having teeth; an insulator extending in a first direction and surrounding the teeth around an axis passing through the teeth, and long in a second direction perpendicular to the first direction when viewed from the first direction; and a coil portion formed of an elastic coil wire and wound around the insulator, wherein the insulator has a first insulator portion, a second insulator portion facing the first insulator portion in the second direction, and a connecting portion connecting the first insulator portion and the second insulator portion in the second direction, and the connecting portion is deformable in the second direction.

11. A rotating electric machine according to any one of claims 1 to 10, comprising a plurality of the insulators, the stator core having a plurality of the tooth portions, the plurality of the tooth portions being arranged in a circumferential direction centered on a central axis, and each of the plurality of the insulators being attached to a different one of the tooth portions.

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