WO2019082667A1

WO2019082667A1 - Stator and motor

Info

Publication number: WO2019082667A1
Application number: PCT/JP2018/037835
Authority: WO
Inventors: 晃弘大北; 貴之右田; 真郷青野; 佑基濱田
Original assignee: 日本電産株式会社
Priority date: 2017-10-27
Filing date: 2018-10-11
Publication date: 2019-05-02
Also published as: CN111247722B; CN111247722A

Abstract

This stator is equipped with a ring-shaped stator core centered around a center axis, an insulator mounted to the stator core, and a plurality of coils attached to the stator core with the insulator interposed therebetween. The coils have a crossover wire for connecting two or more coils. The insulator has a first outer wall section which is positioned on the outside of the coils in the radial direction, and projects to one side in the axial direction farther than do the coils. The first outer wall section has a projection which projects in a radially outward direction on the radially outward surface of the first outer wall section. The surface on the other side of the projection in the axial direction has a first angled surface which angles toward the one side in the axial direction in a radially outward direction. The crossover wire has a section which extends in the circumferential direction and is positioned in a section constituting part of the radially outward surface of the first outer wall section and located on the other side in the axial direction relative to the first angled surface.

Description

Stator and motor

The present invention relates to a stator and a motor.

Conventionally, a motor has a rotor and a stator. The stator has an insulator, a coil and teeth. The coil is disposed on the teeth via the insulator. A crossover wire is wound between the plurality of coils. Also, a lead wire is drawn from at least one coil. The crossovers are arranged avoiding contact with the lead-outs. For example, in the stator of Patent Document 1, guide protrusions serving as guides for magnet wires are formed upright at positions corresponding to the teeth of the insulator. A retaining projection is formed on the outer peripheral surface of the thick portion on the rising tip end side of each guide projection. The crossover is routed through the guide projections.

Patent No. 5532274 gazette

However, when manufacturing the stator, when the crossover is hooked through the radially outer surface of the outer wall of the insulator, the crossover may be displaced from the predetermined position of the outer wall of the insulator, or the outer wall of the insulator and the nozzle of the winding machine May interfere with The winding machine has a nozzle for feeding the wire. A winding machine winds a conducting wire around teeth of a stator core to produce a coil.

An object of this invention is to provide the stator and motor which can suppress that the connecting wire hooked on the outer wall of an insulator leaves | separates in view of the said situation.

One aspect of the stator according to the present invention comprises an annular stator core centered on a central axis, an insulator mounted on the stator core, and a plurality of coils mounted on the stator core via the insulator, the coil Has a connecting wire connecting at least two of the coils, and the insulator has a first outer wall portion which is disposed radially outward of the coil and protrudes on one side in the axial direction with respect to the coil. The first outer wall portion has a convex portion that protrudes outward in the radial direction on the radial outer surface of the first outer wall portion, and the surface on the other side in the axial direction of the convex portion extends in the axial direction toward the radial outer side. It has a first inclined surface located on one side, and the crossover is disposed at a portion of the radially outer surface of the first outer wall portion located on the other axial side with respect to the first inclined surface. It has a portion extending in a direction.

Moreover, one aspect of the motor of the present invention includes the above-described stator, and a rotor that can rotate around the central axis with respect to the stator.

According to the stator and the motor of one aspect of the present invention, it is possible to suppress the disconnection of the connecting wire hooked on the outer wall of the insulator.

FIG. 1 is a perspective view showing a stator and a motor of the present embodiment. FIG. 2 is a cross-sectional view showing the stator and the motor of the present embodiment. FIG. 3 is a perspective view showing a portion of a stator and a motor of the present embodiment. FIG. 4 is a perspective view showing a portion of a stator and a motor of the present embodiment. FIG. 5 is a side view showing a portion of a stator and a motor of the present embodiment. FIG. 6 is a cross-sectional view showing a portion of a stator and a motor of the present embodiment. FIG. 7 is a perspective view showing a portion of a stator and a motor of the present embodiment.

The Z-axis direction appropriately shown in each drawing is a vertical direction with the positive side as the upper side and the negative side as the lower side. A central axis J appropriately shown in each drawing is an imaginary line which is parallel to the Z-axis direction and extends in the vertical direction. In the following description, the axial direction of the central axis J, that is, the direction parallel to the vertical direction is simply referred to as “axial direction”, and the radial direction centering on the central axis J is simply referred to as “radial direction”. The circumferential direction centered on is simply referred to as "circumferential direction". In the present embodiment, the upper side corresponds to one side in the axial direction, and the lower side corresponds to the other side in the axial direction. Note that the vertical direction, the upper side and the lower side are simply names for describing the relative positional relationship of each part, and the actual arrangement relationship etc. is an arrangement relationship etc. other than the arrangement relationship etc. indicated by these names. May be

As shown in FIGS. 1 and 2, the motor 1 of the present embodiment includes a housing 11, a contact member 70, a rotor 80,

bearings

24 and 25, an attachment member 26, a sensor magnet 27, and a stator 10. And.

As shown in FIG. 2, the housing 11 accommodates the rotor 80 and the stator 10. The housing 11 has a lid 12, a cylinder 13, and a bearing holder 14. As shown to FIG. 1 and FIG. 2, the cover part 12 is plate shape to which a plate surface turns to an axial direction, and is annular ring shape along the circumferential direction. The lid 12 is centered on the central axis J. The lid 12 covers the upper side of the stator 10. More specifically, the lid 12 covers the upper side of the stator core 20, the insulator 50 and the coil 40 described later. The lid 12 has a window hole 17 penetrating the lid 12 in the axial direction. When viewed from the axial direction, the window hole 17 is in the shape of a circular arc extending in the circumferential direction. A plurality of window holes 17 are provided along the circumferential direction.

As shown in FIG. 1, a part of the lid 12 has a protrusion 12 a that protrudes upward. The protrusion 12 a is formed, for example, by pressing the lid 12. The upper surface of the protrusion 12 a is a flat surface. The upper surface of the protrusion 12 a extends in the direction orthogonal to the axial direction. The lid 12 has an attachment hole (not shown) which penetrates the lid 12 in the axial direction. The mounting hole axially penetrates the projection 12a.

The cylindrical portion 13 has a cylindrical shape extending downward from the radial outer edge of the lid 12. The cylindrical portion 13 is cylindrical with the central axis J as a center. The cylindrical portion 13 opens downward. At the lower end portion of the cylindrical portion 13, a plurality of collar portions protruding radially outward from the lower end portion of the cylindrical portion 13 are provided along the circumferential direction. As shown in FIG. 2, the bearing holder 14 is connected to the radially inner edge of the lid 12. The bearing holding portion 14 has a tubular shape extending downward from the radial inner edge portion of the lid 12. The bearing holder 14 is cylindrical around the central axis J and has a bottom. The bearing holder 14 holds the bearing 25. The outer peripheral surface of the bearing 25 is fixed to the inner peripheral surface of the bearing holding portion 14.

In the present embodiment, the housing 11 is made of metal, and is made of only a single metal member having the lid 12, the cylinder 13 and the bearing holder 14. That is, the housing 11 has a metal member made of metal having the lid 12 and the cylinder 13, and the metal member is a single member. The housing 11 is made of, for example, aluminum. The housing 11 is manufactured, for example, by pressing a metal plate member. The housing 11 may be configured of a plurality of members. Also, the housing 11 may be manufactured by a method such as cutting or casting. The material of the housing 11 may be other than metal.

The contact member 70 shown in FIG. 1 is a member attached to the housing 11 and capable of contacting a terminal of an external device (not shown). The external device is, for example, a control device that supplies power to the motor 1 to control the motor 1. The terminal of the external device in contact with the contact member 70 is, for example, a terminal for grounding. The terminals of the external device contact the upper surface of the contact member 70. The contact member 70 is disposed on the protrusion 12a.

The contact member 70 has a contact member main body and a claw portion (not shown). In the present embodiment, the contact member main body has a disk shape. Of the pair of plate surfaces of the contact member main body, the plate surface facing downward is in contact with the upper surface of the protrusion 12a. The claws extend downward from the contact member body. The claws are inserted into the attachment holes of the lid 12, for example crimped, and hooked on the lower surface of the projection 12a.

The contact member 70 is a conductive member. In the present embodiment, the contact member 70 is made of metal. The material of the contact member 70 is, for example, different from the material of the housing 11. The material of the contact member 70 may be the same as the material of the housing 11.

The rotor 80 is rotatable around the central axis J with respect to the stator 10. As shown in FIG. 2, the rotor 80 has a shaft 81, a rotor core 82, a rotor magnet 83, and an output portion 84. The shaft 81 is disposed along the central axis J. The shaft 81 has a cylindrical shape extending in the axial direction about the central axis J. The mounting member 26 is fixed to the upper end portion of the shaft 81. The mounting member 26 has a cylindrical shape that opens upward. A sensor magnet 27 is fixed to the inside of the mounting member 26. The sensor magnet 27 has a cylindrical shape that is flat in the axial direction centering on the central axis J. The output unit 84 is attached to the lower end of the shaft 81. In the present embodiment, the output unit 84 is cylindrical. The output unit 84 is used, for example, for fixing when the motor 1 is attached to a device or the like. The output unit 84 is, for example, a shaft coupling member or the like.

The rotor core 82 has a substantially annular shape fixed to the outer peripheral surface of the shaft 81. The rotor magnet 83 is fixed to the outer peripheral surface of the rotor core 82. The

bearings

24, 25 rotatably support the shaft 81. In the present embodiment, the

bearings

24 and 25 are, for example, ball bearings. The

bearings

24 and 25 may be bearings other than ball bearings as long as they can support the shaft 81 rotatably. The rotor core 82 may be directly fixed to the outer peripheral surface of the shaft 81 or may be fixed indirectly via a member or the like.

The stator 10 is radially opposed to the rotor 80 with a gap. More specifically, the stator 10 is disposed radially outside the rotor 80 with a gap. The stator 10 includes a stator core 20, an insulator 50, a plurality of coils 40, a support member 31, a bus bar terminal 43, and a molded resin portion 35.

The stator core 20 is annular around the central axis J. The stator core 20 surrounds the rotor 80 at the radially outer side of the rotor 80. The stator core 20 is disposed on the radially outer side of the rotor magnet 83 so as to face the space with a gap. The stator core 20 is, for example, a laminated steel plate configured by laminating a plurality of electromagnetic steel plates in the axial direction. The stator core 20 may be a dust core or the like.

The stator core 20 has a substantially annular core back 21 and a plurality of teeth 22. In the present embodiment, the core back 21 has an annular shape centered on the central axis J. The teeth 22 extend radially from the inner or outer surface of the core back 21. In the present embodiment, the teeth 22 extend radially inward from the core back 21. As shown in FIG. 2, the outer peripheral surface of the core back 21 is fixed to the inner peripheral surface of the cylindrical portion 13. The outer peripheral surface of the core back 21 is the outer peripheral surface of the stator core 20. That is, the outer peripheral surface of stator core 20 is fixed to the inner peripheral surface of cylindrical portion 13. In the present embodiment, the stator core 20 is fixed to the cylindrical portion 13 by press fitting. Although illustration is omitted, the plurality of teeth 22 are arranged at intervals in the circumferential direction. The plurality of teeth 22 are arranged in the circumferential direction. In the present embodiment, the plurality of teeth 22 are arranged at equal intervals along the circumferential direction.

The insulator 50 is attached to the stator core 20. The material of the insulator 50 is, for example, an insulating material such as a resin. In the present embodiment, the insulator 50 is made of resin. As shown in FIGS. 2 to 6, the insulator 50 has a substantially cylindrical elongated portion 51 through which each tooth 22 passes, an outer wall 52 positioned radially outward of the elongated portion 51, and a radial direction of the elongated portion 51. And an inner wall 53 located inside. In FIGS. 3 to 6, the housing 11, the contact member 70 and the mold resin portion 35 are not shown.

The insulator 50 has a plurality of extending portions 51. The number of extending portions 51 is the same as the number of teeth 22. The extending portion 51 covers the teeth 22. That is, each tooth 22 is covered by the insulator 50. The extending portion 51 extends in the radial direction. The extension portion 51 is disposed between the stator core 20 and the coil 40. That is, the insulator 50 has a portion disposed between the stator core 20 and the coil 40, and this portion is the extending portion 51.

The outer wall 52 extends upward from the radially outer end of the extension 51. The outer wall 52 is disposed radially outward of the coil 40 and extends in the circumferential direction. The outer wall 52 has a substantially cylindrical shape as a whole. The outer wall 52 projects above the coil 40. The outer wall 52 contacts the support member 31 from the lower side. According to the present embodiment, the outer wall 52 of the insulator 50 can ensure insulation between the coil 40 and the cylindrical portion 13 or the like.

As shown in FIGS. 4 to 7, the outer wall 52 has a first outer wall 52a, a pin 52d, a second outer wall 52g, and an opening 52k. That is, the insulator 50 has a first outer wall 52a, a pin 52d, a second outer wall 52g, and an opening 52k. 7, illustration of the housing 11, the contact member 70, the mold resin portion 35, the support member 31, the bus bar terminal 43 and the lead wire 42 is omitted.

The first outer wall 52 a constitutes a circumferential portion of the outer wall 52. The first outer wall 52 a is disposed radially outward of the coil 40. The first outer wall 52 a protrudes above the coil 40. The first outer wall 52a is in the form of a plate whose plate surface faces in the radial direction. The first outer wall 52a extends in the circumferential direction. The first outer wall 52a extends in the axial direction. As shown in FIGS. 6 and 7, the surface of the first outer wall 52 a facing upward is a flat surface 52 f orthogonal to the central axis J. The first outer wall 52a has a protrusion 52b and a recess 52i.

The convex portion 52 b protrudes radially outward on the radially outer side surface of the first outer wall portion 52 a. The convex portion 52 b extends radially outward from the radial outer side surface of the first outer wall portion 52 a. The convex part 52b is arrange | positioned at the upper end part of the 1st outer wall part 52a. As shown in FIG. 5, the convex part 52b is extended in the circumferential direction in the radial direction outer side of the 1st outer wall part 52a. The circumferential length of the protrusion 52 b is smaller than the circumferential length of the first outer wall 52 a. In the present embodiment, the convex portion 52 b is disposed at one end of the first outer wall portion 52 a in the circumferential direction. In the present embodiment, the right side in FIG. 5 is one circumferential side, and the left side in FIG. 5 is the other circumferential side. However, the relative positional relationship in the circumferential direction of each part is not limited to the example described in the present embodiment. For example, the left side in FIG. 5 may be one circumferential side, and the right side in FIG. 5 may be the other circumferential side.

As shown in FIGS. 5 to 7, the lower surface of the convex portion 52b has a first inclined surface 52c. The first inclined surface 52c is located on the upper side as it goes radially outward. That is, the first inclined surface 52c extends upward as it goes radially outward. The first inclined surface 52c is inclined with respect to the central axis J. The radial direction distance between the first inclined surface 52c and the central axis J becomes larger as it goes upward. The first inclined surface 52c extends in the circumferential direction. The length in the circumferential direction of the first inclined surface 52c is larger than the length in the direction perpendicular to the circumferential direction of the first inclined surface 52c. The first inclined surface 52c is connected to the lower side of the radially outer surface of the protrusion 52b. In the present embodiment, as shown in FIG. 6, the axial length of the first inclined surface 52c is larger than the axial length of the radial outer surface of the convex portion 52b.

In the present embodiment, the first inclined surface 52c is a flat surface. However, the present invention is not limited to this, and the first inclined surface 52c may be a curved surface. The first inclined surface 52c may be, for example, either a curved surface projecting radially outward or a curved surface recessed radially inward. In the example of the present embodiment, the entire lower surface of the convex portion 52 b is the first inclined surface 52 c. Although not particularly illustrated, the lower surface of the convex portion 52b may have a surface other than the first inclined surface 52c. The lower surface of the convex portion 52b may have, for example, a surface orthogonal to the central axis J. In this case, the surface orthogonal to the central axis J may be disposed on the upper side of the first inclined surface 52c or may be disposed on the lower side.

The upper end surface of the convex portion 52 b is a plane orthogonal to the central axis J. As shown in FIG. 7, in the example of the present embodiment, the upper end surface of the convex portion 52 b has a rectangular shape. The upper end surface of the convex portion 52b constitutes a part of the upper surface of the first outer wall 52a. That is, the upper end surface of the convex portion 52b constitutes a portion of the flat surface 52f.

As shown in FIGS. 4 to 7, the recess 52i is recessed downward from the upper surface of the first outer wall 52a. The recess 52i penetrates the first outer wall 52a in the radial direction. In the present embodiment, when viewed in the radial direction, the outer shape of the recess 52i is substantially square. The recess 52i is located at an intermediate portion between both end portions in the circumferential direction of the first outer wall 52a. The recess 52i extends in the circumferential direction. The circumferential length of the recess 52i is larger than the axial length of the recess 52i. The recess 52 i is disposed at a circumferential position different from the circumferential position of the protrusion 52 b. In the present embodiment, the recess 52i is disposed on the other side in the circumferential direction of the protrusion 52b. Specifically, by providing the recessed portion 52i, on both sides in the circumferential direction of the recessed portion 52i in the first outer wall portion 52a, a protruding portion that is positioned at the lower end portion of the recessed portion 52i and protrudes relatively upward than the bottom surface facing upward A pair is provided. And a convex part 52b is arrange | positioned at one protrusion part located in the circumferential direction one side of the recessed part 52i among a pair of protrusion parts. In the example of the present embodiment, of the pair of protrusions, the length in the circumferential direction of one protrusion located on one side in the circumferential direction of the recess 52i is the other protrusion located on the other side in the circumferential direction of the recess 52i. Less than the circumferential length of the The circumferential length of the convex portion 52b is smaller than the circumferential length of one protrusion. As shown in FIG. 5, the axial position of the bottom surface facing the upper side of the recess 52i is disposed lower than the axial position of the lower end portion of the first inclined surface 52c.

As shown in FIGS. 6 and 7, the pin 52d extends upward from the upper end of the first outer wall 52a. The pin 52 d extends upward from the surface of the first outer wall 52 a facing the upper side. That is, the pin 52d extends upward from the plane 52f. In the present embodiment, the pin 52d has a substantially cylindrical shape. The outer diameter of the pin 52d is larger than the radial thickness of the portion of the first outer wall 52a other than the circumferential portion where the convex portion 52b is located. The top end surface of the pin 52 d facing upward is a curved surface. The top end surface of the pin 52 d facing upward is a convex curved surface. In the example of the present embodiment, at least the outer peripheral portion of the tip end surface of the pin 52d has a convex curved surface. The lower end portion of the pin 52d is connected to a surface facing the upper side of the first outer wall 52a. At least a portion of the lower end portion of the pin 52d is disposed on the upper end surface of the convex portion 52b. At least the radially outer end portion of the lower end portion of the pin 52d is located on the upper end surface of the convex portion 52b.

The pin 52d has a rib 52e. The rib 52e extends in the axial direction on the outer peripheral surface of the pin 52d. In the present embodiment, the pin 52d has a plurality of ribs 52e. The plurality of ribs 52e are spaced apart from one another around the central axis of the pin 52d on the outer peripheral surface of the pin 52d. In the example of the present embodiment, the rib 52e is disposed in a portion other than the upper end portion of the pin 52d. The projecting height of the rib 52e from the outer peripheral surface of the pin 52d is the smallest at the upper end of the rib 52e. The protruding height of the rib 52e becomes smaller toward the upper side at the upper end of the rib 52e.

As shown in FIGS. 4, 5 and 7, the second outer wall portion 52 g constitutes a circumferential direction portion of the outer wall 52. The second outer wall 52 g is disposed radially outward of the coil 40. The second outer wall 52 g protrudes above the coil 40. The second outer wall 52 g is spaced apart from the first outer wall 52 a in the circumferential direction. In the present embodiment, the second outer wall portion 52g is disposed apart on one circumferential side of the first outer wall portion 52a. The second outer wall portion 52g is in the form of a plate whose plate surface faces in the radial direction. The second outer wall 52 g extends in the circumferential direction. The second outer wall 52 g extends in the axial direction.

As shown in FIG. 5, the axial position of the upper edge of the second outer wall 52 g is disposed lower than the axial position of the upper edge of the first outer wall 52 a. As shown in FIG. 7, the second outer wall 52 g has a second inclined surface 52 h. The second inclined surface 52h is located at the upper end of the radially inner surface of the second outer wall 52g. The radial distance between the second inclined surface 52h and the central axis J becomes larger as it goes upward. The second inclined surface 52h is located radially outward as it goes upward. That is, the second inclined surface 52h extends radially outward toward the upper side. The second inclined surface 52h extends in the circumferential direction. The circumferential length of the second inclined surface 52h is larger than the length of the second inclined surface 52h in the direction perpendicular to the circumferential direction. In the present embodiment, the second inclined surface 52h is a flat surface. However, the present invention is not limited to this, and the second inclined surface 52h may be a curved surface. The second inclined surface 52h may be, for example, either a curved surface that protrudes radially inward or a curved surface that is recessed outward in the radial direction.

As shown in FIGS. 4, 5 and 7, the opening 52k is located between the first outer wall 52a and the second outer wall 52g in the circumferential direction. The opening 52 k is recessed downward from the surface facing the upper side of the outer wall 52 and penetrates the outer wall 52 in the radial direction. In the present embodiment, the circumferential length of the opening 52k is larger than the axial length of the opening 52k. The opening 52 k is located between one tooth 22 and the other tooth 22 in the circumferential direction. In the example of the present embodiment, when viewed in the radial direction, the outer shape of the opening 52k is substantially square.

The insulator 50 has a plurality of inner walls 53. The number of inner walls 53 is the same as the number of teeth 22. The plurality of inner walls 53 are spaced apart from one another in the circumferential direction. The inner wall 53 is in the form of a plate whose plate surface faces in the radial direction. The inner wall 53 extends upward from the radially inner end of the extension 51. The inner wall 53 protrudes on both sides in the circumferential direction more than the extending portion 51. The inner wall 53 is disposed radially inward of the coil 40.

As shown in FIGS. 2, 3 and 7, the coil 40 is attached to the stator core 20. The plurality of coils 40 are respectively attached to the stator core 20 at circumferential intervals. The plurality of coils 40 are attached to the stator core 20 via the insulators 50. The plurality of coils 40 are configured by winding a wire around each tooth 22 via the insulator 50. Although not particularly illustrated, the coil 40 is formed, for example, by moving a nozzle around the teeth 22 via the insulator 50 and winding a conducting wire, with an automatic winding machine (winding machine) having the nozzle. In the present embodiment, the winding system of the coil 40 is a so-called concentrated winding system. In addition, the winding system of the coil 40 may be another system other than the concentrated winding system. In the present embodiment, the stator 10 has three or more coils 40, specifically, six coils 40.

In the present embodiment, the motor 1 is a three-phase motor. The three phases are the U phase, the V phase and the W phase. In the case of a three-phase motor, each coil 40 of U-phase, V-phase and W-phase is constituted by any of three conductors (a first conductor, a second conductor and a third conductor). As shown in FIGS. 2 to 5, the coil 40 has a lead wire 42 and a connecting wire 41. The stator 10 is provided with a plurality of lead wires 42 and a plurality of crossover wires 41. In the present embodiment, six lead wires 42 are provided and two crossover wires 41 are provided.

The lead wire 42 and the connecting wire 41 are both arranged above the stator core 20. That is, the lead wires 42 and the crossover wires 41 are arranged on the same side of the stator core 20 in the axial direction. The lead wire 42 is drawn from the coil 40. The lead wire 42 is an end portion of a lead that constitutes the coil 40. The lead wire 42 extends upward from the coil 40. The crossover 41 connects between one coil 40 and the other coil 40 among the plurality of coils 40. The crossover 41 connects at least two coils 40 to each other. The crossover 41 is disposed below the support member 31. The crossover 41 extends above the coil 40 and below the support member 31. In the present embodiment, the first to third conductive wires constituting the coil 40 of each phase of the U phase, the V phase and the W phase each have a connecting wire 41 and a lead wire 42. That is, the connecting wire 41 and the lead wire 42 in each phase are a part of the conducting wires (first to third conducting wires) which constitute the coil 40 of each phase.

As shown in FIGS. 3 and 4, at least one coil 40 a of the plurality of coils 40 has a lead wire 42 a having a portion extending upward and a portion disposed on the upper side of the support member 31. The lead wire 42 a is a lead wire 42 a drawn from one coil 40 a among the lead wires 42 of the plurality of coils 40 of the stator 10. The lead wire 42 a extends upward from the coil 40 a, passes through the inside of an outer peripheral recess 31 a of the support member 31 described later, and is drawn to the upper side of the support member 31. In the example of the present embodiment, the lead wire 42 a extends in the circumferential direction on the upper side of the support member 31.

The lead (for example, the first lead) constituting the coil 40a from which the lead wire 42a is drawn is the lead (for example, the second lead) constituting the plurality of coils 40 connected by the crossover 41 shown in FIGS. And different. That is, the conducting wire which comprises the coil 40a which has the lead-out wire 42a differs from the conducting wire which comprises one coil 40 and the other coil 40 which the crossover 41 shown to FIG. 4 and FIG. 5 connects. The current supplied to the lead wire 42a and the current supplied to the connecting wire 41 shown in FIGS. 4 and 5 are out of phase with each other. The crossover wire 41 passes through the radially inner side of the portion of the lead wire 42a extending upward from the coil 40a.

As shown in FIG. 4 to FIG. 7, the crossover 41 is disposed on a portion of the radial outer surface of the first outer wall 52 a located below the first inclined surface 52 c and extends in the circumferential direction. Have. That is, the crossover 41 is hooked to a portion of the radial outer surface of the first outer wall 52a located below the first inclined surface 52c of the convex 52b. According to the present embodiment, even if the connecting wire 41 tries to move in the axial direction due to an external force or vibration, for example, the connecting wire 41 contacts the convex portion 52 b from the lower side. At the time of manufacturing the stator 10 or the like, it is suppressed by the convex portion 52b that the crossover wire 41 slips upward from the radially outer surface of the first outer wall portion 52a.

Then, for example, when winding the coil 40 around the stator core 20 with a winding machine having a nozzle and providing the crossover 41, the convex portion 52b is provided with the first inclined surface 52c, whereby the convex portion 52b is wound. Interference with the nozzle of the machine can be suppressed. That is, since the convex portion 52b has the first inclined surface 52c, when the winding machine hooks the connecting wire 41 below the convex portion 52b, the nozzle of the winding machine can easily avoid the convex portion 52b, and the convex portion The contact between 52b and the nozzle is suppressed. Further, by providing the first inclined surface 52c in the convex portion 52b, it becomes easy to secure a space on the radially outer side and the lower side of the first inclined surface 52c, and the nozzle of the winding machine is along the first inclined surface 52c. Makes it easy to move. As a result, it is suppressed that the nozzle is largely diverted with respect to the convex portion 52b, and waste is not easily generated in the movement path of the nozzle. As a result, tact time in manufacturing the stator 10 can be suppressed. Production productivity can be improved. In addition, even when the crossover 41 is wound on the first inclined surface 52c, the crossover 41 slides from the surface of the first inclined surface 52c to the lower side along the inclination of the first inclined surface 52c. Easy to move. For this reason, the crossover 41 can be stably arranged at a predetermined position. By providing the first inclined surface 52c in the convex portion 52b, application of a large force to the connecting wire 41 is suppressed when the connecting wire 41 is drawn around the radially outer surface of the first outer wall 52a. .

In the embodiment, the insulator 50 is made of resin. When the insulator 50 is resin-molded, a pair of molds (upper mold and lower mold) not shown are moved in the axial direction. As shown in FIG. 6, the parting lines P of the pair of molds are positioned above the first inclined surface 52c. Therefore, even if resin burrs (not shown) are generated in the vicinity of the parting line P of the first inclined surface 52c, the contact between the connecting wire 41 located below the first inclined surface 52c and the resin burr is suppressed. Ru. Therefore, the problem that the crossover wire 41 is damaged or the routing becomes unstable due to the resin burr is suppressed.

As shown in FIGS. 4 to 7, the crossover 41 has a portion passing through the inside of the recess 52i. According to the present embodiment, by passing the crossover wire 41 into the recess 52i, the crossover wire from the lower portion of the first inclined surface 52c of the first outer wall 52a to the inner side in the radial direction of the first outer wall 52a 41 is easy to route. Further, in the present embodiment, the axial position of the bottom surface facing the upper side of the recess 52i is disposed below the axial position of the lower end portion of the first inclined surface 52c. For this reason, the crossover 41 can be more easily routed from the portion located below the first inclined surface 52c into the recess 52i. That is, for example, the crossover wire 41 can be simply extended in the circumferential direction from the lower side of the convex portion 52b without being extended obliquely upward toward the circumferential direction, and can be introduced into the recess 52i. . Therefore, in the radial direction outer side surface of the first outer wall 52a, the length of the connecting wire 41 can be shortened.

Moreover, the crossover 41 has a part which passes along the radial direction inside of the 2nd outer wall part 52g. Specifically, the crossover wire 41 passes through the radially inner side of the second outer wall 52g, passes through the opening 52k, extends radially outward of the first outer wall 52a, and at the radially outer surface of the first outer wall 52a It passes under the convex part 52b. According to the present embodiment, when the coil 40 is wound around the stator core 20 by the winding machine having the nozzle and the crossover 41 is provided, the second inclined surface 52h is provided on the second outer wall 52g. It can suppress that 2 outer wall part 52g interferes with the nozzle of a winding machine. That is, since the second outer wall 52g has the second inclined surface 52h, when the winding machine passes the crossover 41 inside the second outer wall 52g in the radial direction, the nozzle of the winding machine is the second outer wall 52g. Can be avoided, and the contact between the second outer wall 52g and the nozzle can be suppressed. Further, by providing the second inclined surface 52h in the second outer wall 52g, it becomes easy to secure a space on the radially inner side and the upper side of the second inclined surface 52h, and the nozzle of the winding machine is made the second inclined surface 52h. It becomes easy to move along the road. As a result, it is suppressed that the nozzle is largely diverted with respect to the second outer wall portion 52g, and waste is not easily generated in the movement path of the nozzle. As a result, the tact time for manufacturing the stator 10 is shortened. Productivity can be improved.

Further, in the present embodiment, as shown in FIG. 5, the axial position of the upper end of the second outer wall 52g is disposed below the axial position of the upper end of the first outer wall 52a. Be done. For this reason, the nozzle of the winding machine is more difficult to contact with the second outer wall 52g.

As shown in FIGS. 2 to 5, the support member 31 is disposed above the stator core 20, the insulator 50 and the coil 40. The material of the support member 31 is an insulating material such as a resin. In the present embodiment, the support member 3
1 is made of resin. As shown in FIGS. 3 to 6, the support member 31 has a main body portion 33 and a bus bar terminal holding portion 32.

The main body portion 33 is in the form of a plate whose plate surface faces in the axial direction. The main body 33 has an annular shape centered on the central axis J. The main body 33 is disposed inside the housing 11. The main body portion 33 is supported and fixed to the insulator 50 from the lower side. The main body 33 is supported from the lower side on the surface facing the upper side of the outer wall 52. The main body 33 is supported from below by the flat surface 52f of the first outer wall 52a. According to the present embodiment, since the main body 33 is supported by the flat surface 52 f, the mounting posture of the support member 31 with respect to the insulator 50 can be stabilized.

The main body 33 has an attachment hole 33 b, an outer peripheral recess 31 a, a through hole 31 b, a partition wall 31 c, and a hole 33 c. That is, the support member 31 has the attachment hole 33b, the outer peripheral recess 31a, the through hole 31b, the partition wall 31c, and the hole 33c. The support member 31 may not have the hole 33c.

As shown in FIGS. 4 to 6, the mounting holes 33b penetrate the main body 33 in the axial direction. The mounting hole 33 b is disposed at the radially outer end of the main body 33. In the example of the present embodiment, the mounting holes 33 b are circular. The pin 52d is inserted into the mounting hole 33b. According to this embodiment, the support member 31 and the insulator 50 can be positioned by inserting the pin 52d into the attachment hole 33b. For this reason, manufacture of stator 10 becomes easy. When the pin 52d is inserted into the mounting hole 33b, preferably, the rib 52e is plastically or elastically deformed. At least a portion of the rib 52e contacts the inner peripheral surface of the mounting hole 33b. According to the present embodiment, since the rib 52e is provided on the pin 52d, the pin 52d can be made difficult to be detached from the mounting hole 33b. That is, the pin 52d can be firmly fixed to the mounting hole 33b by press fitting or the like.

Further, in the present embodiment, at least a part of the lower end portion of the pin 52d is disposed on the upper end surface of the convex portion 52b. The convex portion 52 b is disposed at the upper end portion of the first outer wall portion 52 a, so that the upper end portion of the first outer wall portion 52 a has a large cross-sectional area perpendicular to the central axis J. That is, since the upper end surface of the convex portion 52b constitutes a part of the upper surface of the first outer wall 52a, the upper surface of the first outer wall 52a has a large area. According to this embodiment, the outer diameter of the pin 52d provided at the upper end of the first outer wall 52a can be increased, and the rigidity of the pin 52d against the load when the pin 52d is press-fit into the mounting hole 33b. Is easy to secure. Therefore, the assembly | attachment attitude | position of the supporting member 31 and the insulator 50 can be stabilized. Further, since the surface of the first outer wall 52a facing upward is the flat surface 52f, even when a force is applied to the upper end of the first outer wall 52a when inserting the pin 52d into the mounting hole 33b, this force Are dispersed, and deformation of the upper end portions of the pins 52d and the first outer wall 52a is suppressed. Further, when the support member 31 is attached to the insulator 50, the lower surface of the main body 33 is axially supported by the flat surface 52f, so that the support member 31 can be prevented from being deformed. Further, since the surface of the first outer wall 52a facing upward is the flat surface 52f, the mold can be formed into a simple shape when the insulator 50 is formed by injection molding using a resin. The manufacturing cost can be reduced.

As shown in FIGS. 3 and 4, the outer peripheral recess 31 a penetrates the main body portion 33 in the axial direction and is recessed radially inward from the outer peripheral surface of the main body portion 33. That is, the outer peripheral recess 31 a passes through the support member 31 in the axial direction, and is recessed radially inward from the outer peripheral surface of the support member 31. The outer circumferential recess 31 a is disposed at the radially outer end of the support member 31. As viewed from the axial direction, the outer circumferential recess 31a has an opening that opens radially outward. In the outer peripheral recess 31a, a portion of the lead wire 42a extending upward from the coil 40a is passed. The lead wire 42a is drawn to the upper side of the support member 31 via the insulator 50 and the outer peripheral recess 31a.

In the example of the present embodiment, when viewed from the axial direction, the outer peripheral recess 31 a is U-shaped that opens radially outward and extends in the radial direction. The outer peripheral recess 31 a has a notch shape which is recessed inward in the radial direction from the outer peripheral surface of the main body portion 33. In addition, a notch shape does not mean a manufacturing method but means the shape (structure) of the outer peripheral recessed portion 31a.

Of the inner peripheral surface (inner edge) of the outer peripheral recess 31a, a pair of portions directed in the circumferential direction is a linear shape extending in the radial direction as viewed from the axial direction. Of the inner peripheral surface of the outer peripheral recess 31a, a pair of portions facing in the circumferential direction are opposed to each other at an interval in the circumferential direction. Of the inner peripheral surface of the outer peripheral recess 31a, the radially inner end portion is in the shape of a concave curve which is recessed inward in the radial direction when viewed from the axial direction, and specifically, it is in the shape of a concave arc. In addition, this part is corresponded to the 1st wall surface which the partition wall part 31c mentions later. That is, viewed from the axial direction, at least a part of the inner peripheral surface of the outer peripheral recess 31a is recessed radially inward. In the example of the present embodiment, when viewed in the axial direction, at least a part of the inner peripheral surface of the outer peripheral recess 31a is located inside the through hole 31b described later. As viewed from the axial direction, the inner circumferential surface of the outer circumferential recess 31 a has a portion located radially inward of the outer wall 52 of the insulator 50. Specifically, at least the radially inner end portion of the inner circumferential surface of the outer circumferential recess 31 a is positioned radially inward of the outer wall 52. A portion of the inner circumferential surface of the outer circumferential recess 31a located radially inward of the outer wall 52 is located above the coil 40a. A portion of the inner peripheral surface of the outer peripheral recess 31a located radially inward of the outer wall 52 overlaps the coil 40a as viewed from the axial direction.

The through hole 31 b penetrates the main body 33 in the axial direction. That is, the through hole 31 b penetrates the support member 31 in the axial direction. The through hole 31 b has a function as a lightening hole of the main body 33, for example. By providing the through holes 31 b, the amount of material used for the main body 33 can be reduced, and weight reduction, material cost reduction, and the like can be performed. The through hole 31 b is disposed radially inward of the outer peripheral recess 31 a. The through hole 31 b is disposed adjacent to the outer circumferential recess 31 a radially inward. When viewed in the radial direction, the through holes 31 b overlap the outer peripheral recess 31 a. In the circumferential direction, the position of the through hole 31 b is the same as the position of the outer peripheral recess 31 a. In the main body portion 33, the through hole 31b and the outer peripheral recess 31a are provided independently of each other.

When viewed in the axial direction, the through holes 31 b overlap the crossovers 41. According to the present embodiment, the worker assembling the motor 1, an assembly device or the like (hereinafter, the worker or the like) can easily recognize the crossover 41 through the through hole 31b. The through holes 31 b extend in the circumferential direction. Both ends in the circumferential direction of the through hole 31 b are disposed on the outer side in the circumferential direction than both ends in the circumferential direction of the outer circumferential recess 31 a. According to the present embodiment, since the through holes 31 b are largely opened in the circumferential direction, the worker or the like can more easily visually recognize the crossover 41 through the through holes 31 b. Further, in the present embodiment, the through hole 31 b overlaps the outer peripheral recess 31 a even when viewed from the circumferential direction. Therefore, the dimension in the radial direction of the main body 33 can be reduced while ensuring both the function of the through hole 31 b and the function of the outer peripheral recess 31 a.

The partition wall portion 31c is disposed between the outer peripheral recess 31a and the through hole 31b. The partition wall portion 31c has a portion located between the outer peripheral recess 31a and the through hole 31b at least in the radial direction. The partition wall portion 31c is a wall portion that partitions the outer peripheral recess 31a and the through hole 31b. Partition wall part 31c constitutes a part of wall part which constitutes perimeter crevice 31a, and constitutes a part of wall parts which constitute penetration hole 31b. In the example of the present embodiment, when viewed from the axial direction, the partition wall portion 31c has an arc shape which is convex inward in the radial direction. The partition wall portion 31c has a first wall surface and a second wall surface.

The first wall surface is a wall surface facing radially outward in the partition wall portion 31c. The first wall surface constitutes a portion of the inner peripheral surface of the outer peripheral recess 31a. The first wall surface is positioned at the radially inner end portion of the inner peripheral surface of the outer peripheral recess 31a. When viewed from the axial direction, the first wall surface is recessed radially inward. In the example of the present embodiment, when viewed from the axial direction, the first wall surface has an arc shape which is recessed inward in the radial direction.

The second wall surface is a wall surface facing inward in the radial direction in the partition wall portion 31c. The second wall surface constitutes a portion of the inner peripheral surface of the through hole 31 b. The second wall surface is connected to the radially outer end portion of the inner peripheral surface of the through hole 31 b. The second wall surface is disposed adjacent to the radially outer end portion of the inner peripheral surface of the through hole 31 b in the circumferential direction. When viewed in the axial direction, the second wall projects radially inward. In the example of the present embodiment, when viewed from the axial direction, the second wall surface has an arc shape that is convex inward in the radial direction.

The portion of the lead wire 42a that extends upward passes radially outward of the first wall surface in the outer circumferential recess 31a. According to the present embodiment, since the lead wire 42a passes through the outer peripheral recess 31a, the lead wire 42a that has been temporarily bent radially outward from the coil 40a through the insulator 50 at the time of manufacturing the stator 10 is It can be bent back upward and disposed in the outer peripheral recess 31a. That is, although not shown in the drawings, the circumferential position of the lead wire 42 a drawn to the radial outer side of the stator core 20 is the same as the circumferential position of the outer circumferential recess 31 a. Therefore, when the radially extending lead wire 42a is raised upward, a part of the portion extending upward of the lead wire 42a is accommodated in the outer peripheral recess 31a, and the lead wire 42a is easily moved upward (toward the support member 31). It can be pulled out. Therefore, a worker or the like can easily arrange the lead wire 42a from the outside to the inside of the outer peripheral recess 31a. According to the present embodiment, it is easy to automate the coil winding operation. That is, according to the above-described structure, the stator 10 can be easily manufactured by automatic assembly using a machine or the like.

Moreover, the lead wire 42a and the crossover 41 are mutually spaced apart and arrange | positioned by the partition wall part 31c. That is, a gap between the lead wire 42a passing radially outside the first wall surface of the partition wall 31c and the connecting wire 41 passing radially inside the lead wire 42a is stably secured. That is, the crossover wire 41 is disposed below the support member 31, and the lead wire 42 a has a portion disposed above the support member 31. And, the lead wire 42a is disposed radially apart from the crossover wire 41 by passing through the outer peripheral recess 31a. According to the present embodiment, the lead wire 42 a and the crossover wire 41 are disposed on the same side in the axial direction of the stator core 20 (the upper side of the stator core 20 in the present embodiment). Contact is suppressed. Further, since the through holes 31 b are provided, the crossovers 41 are easily visually recognized by an operator or the like through the through holes 31 b when the stator 10 is manufactured. And the clearance gap between the lead wire 42a and the crossover 41 is stably ensured. In the present embodiment, the phase of the current flowing through the lead wire 42 a is different from the phase of the current flowing through the connecting wire 41. According to the present embodiment, a short circuit between the lead wire 42 a and the crossover wire 41 can be suppressed.

When viewed from the axial direction, the crossovers 41 are disposed radially inward from the first wall surface of the partition wall 31c. According to the present embodiment, the contact between the crossover wire 41 and the lead wire 42a can be further suppressed.

The first wall surface has a portion of the inner circumferential surface of the through hole 31 b located radially inward of the radially outer end portion. For this reason, the partition wall portion 31c is shaped so as to enter the inside of the through hole 31b. According to the present embodiment, the radial inner end of the outer peripheral recess 31 a can be easily separated from the outer peripheral surface of the support member 31. As in the present embodiment, even when the metal tubular portion 13 is disposed radially outside the support member 31, the lead wire 42 a passing through the inside of the outer peripheral concave portion 31 a can be disposed apart from the tubular portion 13. Therefore, the insulation between the lead wire 42a and the cylindrical portion 13 is secured.

As shown in FIG. 3, the hole 33 c penetrates the main body 33 in the axial direction. The holes 33c extend in the circumferential direction. A plurality of holes 33c are provided at intervals in the circumferential direction. The hole 33 c has, for example, a function as a lightening hole of the main body 33. By providing the holes 33c, the amount of material used in the main body 33 can be reduced, and weight reduction, material cost reduction, and the like can be performed. The lead wire 42 is passed through at least one hole 33 c of the plurality of holes 33 c.

The bus bar terminal holding portion 32 extends upward from the main body portion 33. A plurality of bus bar terminal holding portions 32 are provided along the circumferential direction. In the present embodiment, three bus bar terminal holding portions 32 are provided. The bus bar terminal holding portion 32 holds the bus bar terminal 43. The bus bar terminal holding portion 32 has a tubular shape extending in the axial direction, and holds the bus bar terminal 43 inside. According to the present embodiment, the bus bar terminal 43 can be easily held by the bus bar terminal holding portion 32. The bus bar terminal holding portion 32 extends to the upper side than the lid portion 12 through the window hole 17 and protrudes to the outside of the housing 11.

As shown in FIGS. 3 to 5, the bus bar terminal 43 is supported by the support member 31 and connected to the coil 40. The bus bar terminal 43 is a conductive member. In the present embodiment, the bus bar terminals 43 are made of metal such as copper and silver. The bus bar terminal 43 protrudes from the inside of the housing 11 to the outside of the housing 11 through the window hole 17. The bus bar terminal 43 has a conductive portion 43 b and a connection portion 43 a.

The conduction portion 43 b is in the form of a plate whose plate surface faces in the radial direction, and extends in the axial direction. Conducting portion 43 b is inserted into and held by bus bar terminal holding portion 32. Conducting portion 43 b protrudes upward relative to bus bar terminal holding portion 32. The conduction portion 43 b is connected to an external device such as a control device of the motor 1. The conductive portion 43 b can be connected to, for example, a control substrate or an external power supply.

The connecting portion 43a is connected to the lower end of the conducting portion 43b. The connection portion 43a protrudes to one side in the radial direction more than the conduction portion 43b. In the example of the present embodiment, the connection portion 43 a protrudes radially inward of the conduction portion 43 b. The connection portion 43 a is connected to the lead wire 42. Thus, the bus bar terminal 43 is electrically connected to the coil 40. In the example of the present embodiment, two lead wires 42 are connected to the connection portion 43a. The two lead wires 42 are arranged axially in line with each other.

At least a part of the connection portion 43 a is disposed so as to protrude radially inward with respect to a surface of the bus bar terminal holding portion 32 facing inward in the radial direction. Specifically, at least a portion of the connection portion 43 a connected to the lead wire 42 is disposed radially inward of a surface of the bus bar terminal holding portion 32 facing inward in the radial direction. According to the present embodiment, it is possible to suppress the difficulty in drawing the lead wire 42 in the vicinity of the bus bar terminal holding portion 32, and the connection portion 43a and the lead wire 42 can be easily connected. In the present embodiment, the connection portion 43a and the lead wire 42 are welded.

In the present embodiment, although not shown in the drawings, in the vertical cross section including the central axis J, the connection portion 43a has a substantially U shape opening upward. Connection portion 43 a includes a portion of bus bar terminal 43 that is curved in a U-shape. The connection portion 43a is formed by bending a part of the plate member into a U-shape. The lead wire 42 is inserted into the connection portion 43a.

As shown in FIG. 3, in the present embodiment, three bus bar terminals 43 are provided along the circumferential direction. The three bus bar terminals 43 are supplied with U-phase, V-phase, and W-phase alternating currents, respectively. Thereby, a three-phase alternating current is supplied to the motor 1 through the three bus bar terminals 43. In the present embodiment, the motor 1 is a three-phase motor. However, the motor 1 is not limited to a three-phase motor, and may be a single-phase motor, a two-phase motor, or a four-phase or more multi-phase motor. In that case, the number of bus bar terminals 43 may be appropriately changed according to the number of phases of the motor. In addition, the number of coils 40, the number of lead wires 42, and the number of crossovers 41 described above may be changed as appropriate.

The mold resin portion 35 is a member made of resin. As shown in FIG. 2, the mold resin portion 35 has a substantially cylindrical shape extending in the axial direction centering on the central axis J. As shown in FIGS. 1 and 2, the mold resin portion 35 covers at least a portion of the support member 31 and at least a portion of the bus bar terminal 43. According to the present embodiment, the support member 31 and the bus bar terminal 43 are fixed by the mold resin portion 35, and the support state of the bus bar terminal 43 is stabilized.

More specifically, a portion of stator core 20, at least a portion of insulator 50, at least a portion of coil 40, at least a portion of support member 31, and at least a portion of bus bar terminal 43 are embedded in mold resin portion 35. . Therefore, the stator core 20, the insulator 50, the coil 40, the support member 31, and the bus bar terminal 43 can be integrally fixed together by the mold resin portion 35. In addition, the coil 40 can be easily insulated. In the present embodiment, the entire insulator 50 and the entire coil 40 are embedded in the mold resin portion 35.

In the support member 31, the entire portion excluding the upper end surface of the bus bar terminal holding portion 32 is embedded in the mold resin portion 35. The connection portion 43 a of the bus bar terminal 43 is covered by the mold resin portion 35. As a result, the fixed state of the connection portion 43a and the lead wire 42 is stable, and the sealability in the vicinity of the connection portion 43a is enhanced. Further, in the example of the present embodiment, the mold resin portion 35 covers the portion of the bus bar terminal 43 other than the conductive portion 43 b. At least a part of the conductive portion 43 b is exposed from the mold resin portion 35. Specifically, at least the upper end portion of the conductive portion 43 b is exposed from the mold resin portion 35. According to the present embodiment, the mold resin portion 35 secures the sealing property of the portion of the bus bar terminal 43 other than the conductive portion 43 b while securing the conduction of the conductive portion 43 b.

The mold resin portion 35 is manufactured, for example, by insert molding in which molten resin is poured and solidified in a mold in which the stator core 20, the insulator 50, the coil 40, the support member 31, and the bus bar terminal 43 are inserted. The melted resin is poured into one side of the mold in the axial direction. That is, the resin flows around the stator core 20, the insulator 50 and the coil 40, and then reaches around the support member 31 and the bus bar terminal 43.

The mold resin portion 35 has a first annular portion 36, a second annular portion 37, a plurality of columnar portions (not shown), and a bus bar terminal support portion 38. The first annular portion 36 has a substantially annular shape centered on the central axis J. As shown in FIG. 2, the first annular portion 36 is located above the upper surface of the stator core 20. The first annular portion 36 is disposed radially outward of the rotor 80 and surrounds a portion of the rotor 80. The first annular portion 36 surrounds a portion of the shaft 81 and the bearing 25 from the radially outer side. The outer circumferential surface of the first annular portion 36 is disposed radially inward of the outer circumferential surface of the stator core 20. The outer peripheral surface of the first annular portion 36 extends upward from the upper end surface of the core back 21. The inner circumferential surface of the first annular portion 36 is disposed at the same position as the radially inner side surface of the teeth 22 in the radial direction.

The first annular portion 36 is disposed below the lid 12. The entire first annular portion 36 is housed inside the housing 11. The first annular portion 36 covers the window hole 17 from the lower side. Therefore, foreign matter can be prevented from entering the inside of the housing 11 from the outside of the housing 11 through the window hole 17. In the first annular portion 36, a portion of the insulator 50 above the stator core 20, a portion of the coil 40 above the stator core 20, and a portion of the support member 31 disposed inside the housing 11; A portion of the bus bar terminal 43 disposed inside the housing 11 is embedded.

The first annular portion 36 is in contact with the lower surface of the lid portion 12 along one circumferential direction. Specifically, of the upper end of the first annular portion 36, the end outside in the radial direction is the entire circumference in the circumferential direction with respect to the part of the lower surface of the lid 12 located radially outside of the window hole 17. It contacts from the lower side over.

The first annular portion 36 has a first hole 36 a recessed downward from the upper surface of the first annular portion 36. As shown in FIG. 1, the first hole 36 a overlaps the window hole 17 when viewed along the axial direction. Thereby, for example, by inserting a jig into the first hole 36 a from the upper side of the lid 12 through the window hole 17, the stator 10 is positioned in the circumferential direction with respect to the housing 11 while the stator 10 is housing It can be fixed at 11. In the present embodiment, a plurality of first hole portions 36 a are provided along the circumferential direction.

In the present embodiment, the second annular portion 37 is annular with the central axis J as a center. As shown in FIG. 2, the second annular portion 37 is located below the lower surface of the stator core 20. The second annular portion 37 is disposed radially outward of the rotor 80 and surrounds a portion of the rotor 80. The second annular portion 37 surrounds a portion of the shaft 81 and a portion of the bearing 24 from the radially outer side. The outer circumferential surface of the second annular portion 37 is disposed radially inward of the outer circumferential surface of the stator core 20. The outer peripheral surface of the second annular portion 37 extends downward from the lower end surface of the core back 21. The inner circumferential surface of the second annular portion 37 is disposed at the same position as the radially inner side surface of the teeth 22 in the radial direction.

The lower end of the second annular portion 37 protrudes from the lower opening of the cylindrical portion 13 below the housing 11. A bearing 24 is fitted and held inside the lower end of the second annular portion 37. In the second annular portion 37, a portion of the insulator 50 below the stator core 20 and a portion of the coil 40 below the stator core 20 are embedded.

The plurality of columnar parts are columnar parts extending in the axial direction. Although not shown, the plurality of columnar parts are arranged at equal intervals along the circumferential direction. The plurality of columnar portions are disposed in portions between the teeth 22 adjacent to each other in the circumferential direction. Each columnar portion is filled between the teeth 22 adjacent in the circumferential direction. The upper end of the columnar portion is connected to the first annular portion 36. The lower end of the columnar portion is connected to the second annular portion 37. The columnar portion connects the first annular portion 36 and the second annular portion 37. The radially inner side surface of the columnar portion is disposed at the same position as the radially inner side surface of the tooth 22 in the radial direction.

The inner circumferential surface of the first annular portion 36, the inner circumferential surface of the second annular portion 37, the radially inner side surface of each columnar portion, and the radially inner side surface of each tooth 22 have the same radial position. It forms a cylindrical curved surface centered on the central axis J.

As shown in FIG. 1, the bus bar terminal support portion 38 has a columnar shape that protrudes upward from the first annular portion 36. The upper surface of the bus bar terminal support 38 is in the form of a flat surface extending in the direction perpendicular to the central axis J. The axial position of the upper surface of the bus bar terminal support portion 38 is the same as the axial position of the upper end surface of the bus bar terminal holding portion 32. The upper end surface of the bus bar terminal holding portion 32 is exposed to the outside on the upper surface of the bus bar terminal support portion 38.

When viewed along the axial direction, the bus bar terminal support 38 extends in an arc shape along the circumferential direction. The side surfaces on both sides in the circumferential direction of the bus bar terminal support portion 38 are inclined in a direction approaching each other in the circumferential direction toward the upper side. The circumferential dimension of the bus bar terminal support portion 38 becomes smaller toward the upper side. Thereby, for example, when molding the bus bar terminal support portion 38 by injection molding, the mold can be easily removed. The circumferential dimension of the bus bar terminal support portion 38 is smaller than the circumferential dimension of the window hole 17.

A plurality of bus bar terminal support portions 38 are provided along the circumferential direction. In the present embodiment, three bus bar terminal support portions 38 are provided along the circumferential direction. At least a part of the bus bar terminal 43 is embedded in and supported by the bus bar terminal support portion 38. The lower portion of the bus bar terminal 43 and the upper portion of the bus bar terminal holding portion 32 are embedded in the bus bar terminal support portion 38. The upper end of the bus bar terminal 43 projects upward from the bus bar terminal support 38. Thus, when the external device is disposed on the upper side of the motor 1, the external device can be easily connected to the bus bar terminal 43.

At least a portion of the bus bar terminal support 38 is inserted into the window hole 17. In the present embodiment, the bus bar terminal support portion 38 protrudes above the lid 12 through the window hole 17 from the first annular portion 36. When viewed in the axial direction, the outer edge of the bus bar terminal support 38 is disposed with a gap inside the inner edge of the window hole 17 over the entire circumference. Therefore, when the bus bar terminal support portion 38 is passed through the window hole 17, contact of the bus bar terminal support portion 38 with the inner edge of the window hole 17 can be suppressed, and distortion of the shape of the lid portion 12 can be suppressed. Further, the bus bar terminal support portion 38 can be prevented from being damaged by coming into contact with the inner edge of the window hole 17. The outer edge of the bus bar terminal support 38 may be in contact with the inner edge of the window hole 17.

In the present embodiment, the housing 11 has a bearing holding portion 14 connected to the radially inner edge portion of the lid 12. In the present embodiment, since distortion of the lid 12 can be suppressed as described above, distortion of the bearing holding portion 14 connected to the lid 12 can be suppressed. Therefore, it can suppress that the arrangement | positioning precision of the bearing 25 and the shaft 81 falls.

Among the plurality of bus bar terminal support portions 38, one bus bar terminal support portion 38 has a second hole 39 recessed downward from the upper surface of the bus bar terminal support portion 38. The second hole 39 can be used, for example, for positioning the stator 10 in the circumferential direction, attaching the external device to the bus bar terminal support 38, and the like.

In the process of fixing the stator 10 to the housing 11, an operator or the like presses the stator 10 into the housing 11 from the lower opening of the cylindrical portion 13. The worker or the like moves the stator 10 upward with respect to the housing 11 until the first annular portion 36 contacts the lower surface of the lid 12. Thereby, the stator 10 is fixed to the housing 11 by press fitting.

The present invention is not limited to the above-described embodiment. For example, as described below, changes in configuration and the like are possible without departing from the spirit of the present invention.

In the above-mentioned embodiment, although the example in which insulator 50 has one outer wall 52, a plurality of extension parts 51, and a plurality of inner walls 53 was mentioned, it is not limited to this. Although not particularly illustrated, a plurality of insulators 50 may be provided on the stator core 20. That is, a plurality of insulators 50 each having one outer wall 52, one extending portion 51, and one inner wall 53 may be mounted on the stator core 20 in the circumferential direction. In this case, insulators 50 are respectively disposed on the plurality of teeth 22. The plurality of teeth 22 are adjacent to each other in the circumferential direction, and the insulators 50 provided to the teeth 22 are also adjacent to each other in the circumferential direction. And insulator 50 arranged at one tooth 22 among a plurality of teeth 22 has the 1st outer wall part 52a, and insulator 50 arranged at other teeth 22 has the 2nd outer wall part 52g. Also in this case, the same effects as those of the above-described embodiment can be obtained.

In the above-mentioned embodiment, although pin 52d was substantially cylindrical and the example which attachment hole 33b is circular is mentioned, it is not limited to this. For example, the pin 52d may have a substantially prismatic shape, and the attachment hole 33b may have a substantially square hole shape. In this case, the shape of the cross section perpendicular to the axial direction of the pin 52d may be square or may be polygonal other than square. The shape of the cross section perpendicular to the axial direction of the mounting hole 33b may be square or may be polygonal other than square. That is, the pin 52d may have a substantially polygonal columnar shape, and the attachment hole 33b may have a substantially polygonal hole shape. The shape of the cross section perpendicular to the axial direction of the pin 52d may be the same as or different from the shape of the cross section perpendicular to the axial direction of the mounting hole 33b. Further, the shape, arrangement, number and the like of the ribs 52e are not limited to the above embodiment. For example, only one rib 52e may be provided on the outer peripheral surface of the pin 52d. The rib 52e may not be provided on the pin 52d.

In the above-mentioned embodiment, although the lead wire which constitutes coil 40a which has lead wire 42a differs from the lead wire which constitutes one coil 40 and the other coil 40 which are connected by crossover 41, this gave an example. It is not limited to. The conducting wire which comprises the coil 40a which has the lead-out wire 42a may be the same as the conducting wire which comprises one coil 40 and the other coil 40 which are connected by the connecting wire 41. Also in this case, according to the present embodiment, the contact between the lead wire 42 a and the crossover wire 41 is suppressed, and the motor 1 can be easily assembled.

In the above-mentioned embodiment, although a nozzle type automatic winding machine gave an example which winds a lead around teeth 22 of stator core 20, and produces coil 40, it is not limited to this. Instead of the nozzle type winding machine, a winding machine such as a shaft-turning type or a flyer type may produce the coil 40. Also, the winding machine may be a manual winding machine. Instead of using a winding machine, a worker or the like may produce the coil 40 by manual winding.

In the above embodiment, in the description of the bus bar terminal 43, one radial side is the radial inner side. However, the present invention is not limited to this. The radial one side may be the radial outer side.

Although the example which exposed at least one part of conduction part 43b from mold resin part 35 was mentioned in the above-mentioned embodiment, the whole bus bar terminal 43 may be covered with mold resin part 35.

The application of the motor of the embodiment described above is not particularly limited. The motor of the embodiment described above can be used in various devices such as a pump, a brake, a clutch, a vacuum cleaner, a dryer, a ceiling fan, a washing machine, a refrigerator and an electric power steering device.

In addition, without departing from the spirit of the present invention, each configuration (component) described in the above-described embodiment, modification, and note may be combined, and addition, omission, replacement, and other configurations can be made. Changes are possible. Moreover, this invention is not limited by embodiment mentioned above, It is limited only by the claim.

DESCRIPTION OF SYMBOLS 1 ... Motor, 10 ... Stator, 20 ... Stator core, 22 ... Teeth, 31 ... Support member, 33 ... Body part, 33b ... Mounting hole, 40 ... Coil, 41 ... Connecting wire, 50 ... Insulator, 52a ... 1st outer wall part , 52b: convex portion, 52c: first inclined surface, 52d: pin, 52e: rib, 52f: flat surface, 52g: second outer wall portion, 52h: second inclined surface, 52i: recess, 80: rotor, J: center axis

Claims

An annular stator core centered on the central axis,

An insulator attached to the stator core, and a plurality of coils attached to the stator core via the insulator

Equipped with

The coil has a connecting wire connecting at least two of the coils,

The insulator has a first outer wall portion that is disposed radially outward of the coil and protrudes to one side in the axial direction with respect to the coil.

The first outer wall portion has a convex portion protruding radially outward on the radial outer side surface of the first outer wall portion,

The surface on the other side in the axial direction of the convex portion has a first inclined surface positioned on one side in the axial direction toward the radially outer side,

The stator includes a portion extending in the circumferential direction and disposed in a portion of the radially outer surface of the first outer wall portion positioned on the other axial side with respect to the first inclined surface.
The stator according to claim 1, wherein the insulator is made of resin.
The stator according to claim 1 or 2,

A support member disposed on one side in the axial direction of the stator core;

The support member has a plate-like main portion whose plate surface faces in the axial direction,

The main body portion has a mounting hole axially penetrating the main body portion,

The insulator has a pin extending from one axial end of the first outer wall toward one axial side,

The stator is inserted into the mounting hole.
The stator according to claim 3, wherein

The pin has an axially extending rib on the outer peripheral surface of the pin,

A stator in which at least a portion of the rib contacts an inner circumferential surface of the mounting hole.
The stator according to claim 3 or 4, wherein

The convex portion is disposed at an end portion on one side in the axial direction of the first outer wall portion,

A stator, wherein at least a part of an end on the other axial side of the pin is disposed on an end face on one axial side of the protrusion.
The stator according to claim 5, wherein

The surface of the first outer wall portion facing one side in the axial direction is a plane orthogonal to the central axis,

The pin extends axially from the plane toward one side,

The stator, wherein the main body portion is supported from the other side in the axial direction by the flat surface.
The stator according to any one of claims 1 to 6, wherein

The insulator has a second outer wall portion that is disposed radially outward of the coil, protrudes to one side in the axial direction with respect to the coil, and is spaced apart from the first outer wall portion in the circumferential direction.

The second outer wall portion is located at an end portion on one side in the axial direction of the radially inner surface of the second outer wall portion, and the radial distance between the second outer wall portion and the central axis increases toward the one axial side. Has 2 slopes,

The stator, wherein the crossover has a portion passing radially inward of the second outer wall portion.
The stator according to any one of claims 1 to 6, wherein

A plurality of the insulators are provided on the stator core,

The stator core has a plurality of radially extending and circumferentially arranged teeth,

The insulators are respectively disposed on the plurality of teeth.

The insulator disposed in one of the teeth has the first outer wall portion,

The insulator disposed on the other teeth is disposed radially outward of the coil, protrudes to one side in the axial direction with respect to the coil, and is spaced apart from the first outer wall in the circumferential direction. 2 has an outer wall,

The second outer wall portion is located at an end portion on one side in the axial direction of the radially inner surface of the second outer wall portion, and the radial distance between the second outer wall portion and the central axis increases toward the one axial side. Has 2 slopes,

The stator, wherein the crossover has a portion passing radially inward of the second outer wall portion.
The stator according to claim 7 or 8, wherein

A stator, wherein an axial position of an edge on one axial side of the second outer wall portion is disposed on the other axial side of an axial position of an edge on one axial side of the first outer wall portion.
The stator according to any one of claims 1 to 9, wherein

The first outer wall portion has a recess recessed from a surface on one side in the axial direction of the first outer wall portion to the other side in the axial direction, and disposed at a circumferential position different from the circumferential position of the protrusion.

The recessed portion radially penetrates the first outer wall portion,

The stator has a portion passing through the recess.
The stator according to claim 10, wherein

The stator, wherein the axial position of the bottom surface facing the axial direction one side of the recess is disposed on the other axial side of the axial position of the other axial end of the first inclined surface.
The stator according to any one of claims 1 to 11.

A motor rotatable about the central axis with respect to the stator.